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ruby/string.c

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178 KiB
C
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/**********************************************************************
string.c -
$Author$
created at: Mon Aug 9 17:12:58 JST 1993
Copyright (C) 1993-2007 Yukihiro Matsumoto
Copyright (C) 2000 Network Applied Communication Laboratory, Inc.
Copyright (C) 2000 Information-technology Promotion Agency, Japan
**********************************************************************/
#include "ruby/ruby.h"
#include "ruby/re.h"
#include "ruby/encoding.h"
#define BEG(no) regs->beg[no]
#define END(no) regs->end[no]
#include <math.h>
#include <ctype.h>
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#undef rb_str_new_cstr
#undef rb_tainted_str_new_cstr
#undef rb_usascii_str_new_cstr
#undef rb_external_str_new_cstr
#undef rb_locale_str_new_cstr
#undef rb_str_new2
#undef rb_str_new3
#undef rb_str_new4
#undef rb_str_new5
#undef rb_tainted_str_new2
#undef rb_usascii_str_new2
#undef rb_str_dup_frozen
#undef rb_str_buf_new_cstr
#undef rb_str_buf_new2
#undef rb_str_buf_cat2
#undef rb_str_cat2
VALUE rb_cString;
VALUE rb_cSymbol;
#define RUBY_MAX_CHAR_LEN 16
#define STR_TMPLOCK FL_USER7
#define STR_NOEMBED FL_USER1
#define STR_SHARED FL_USER2 /* = ELTS_SHARED */
#define STR_ASSOC FL_USER3
#define STR_SHARED_P(s) FL_ALL(s, STR_NOEMBED|ELTS_SHARED)
#define STR_ASSOC_P(s) FL_ALL(s, STR_NOEMBED|STR_ASSOC)
#define STR_NOCAPA (STR_NOEMBED|ELTS_SHARED|STR_ASSOC)
#define STR_NOCAPA_P(s) (FL_TEST(s,STR_NOEMBED) && FL_ANY(s,ELTS_SHARED|STR_ASSOC))
#define STR_UNSET_NOCAPA(s) do {\
if (FL_TEST(s,STR_NOEMBED)) FL_UNSET(s,(ELTS_SHARED|STR_ASSOC));\
} while (0)
#define STR_SET_NOEMBED(str) do {\
FL_SET(str, STR_NOEMBED);\
STR_SET_EMBED_LEN(str, 0);\
} while (0)
#define STR_SET_EMBED(str) FL_UNSET(str, STR_NOEMBED)
#define STR_EMBED_P(str) (!FL_TEST(str, STR_NOEMBED))
#define STR_SET_EMBED_LEN(str, n) do { \
long tmp_n = (n);\
RBASIC(str)->flags &= ~RSTRING_EMBED_LEN_MASK;\
RBASIC(str)->flags |= (tmp_n) << RSTRING_EMBED_LEN_SHIFT;\
} while (0)
#define STR_SET_LEN(str, n) do { \
if (STR_EMBED_P(str)) {\
STR_SET_EMBED_LEN(str, n);\
}\
else {\
RSTRING(str)->as.heap.len = (n);\
}\
} while (0)
#define STR_DEC_LEN(str) do {\
if (STR_EMBED_P(str)) {\
long n = RSTRING_LEN(str);\
n--;\
STR_SET_EMBED_LEN(str, n);\
}\
else {\
RSTRING(str)->as.heap.len--;\
}\
} while (0)
#define RESIZE_CAPA(str,capacity) do {\
if (STR_EMBED_P(str)) {\
if ((capacity) > RSTRING_EMBED_LEN_MAX) {\
char *tmp = ALLOC_N(char, capacity+1);\
memcpy(tmp, RSTRING_PTR(str), RSTRING_LEN(str));\
RSTRING(str)->as.heap.ptr = tmp;\
RSTRING(str)->as.heap.len = RSTRING_LEN(str);\
STR_SET_NOEMBED(str);\
RSTRING(str)->as.heap.aux.capa = (capacity);\
}\
}\
else {\
REALLOC_N(RSTRING(str)->as.heap.ptr, char, (capacity)+1);\
if (!STR_NOCAPA_P(str))\
RSTRING(str)->as.heap.aux.capa = (capacity);\
}\
} while (0)
#define is_ascii_string(str) (rb_enc_str_coderange(str) == ENC_CODERANGE_7BIT)
#define is_broken_string(str) (rb_enc_str_coderange(str) == ENC_CODERANGE_BROKEN)
#define STR_ENC_GET(str) rb_enc_from_index(ENCODING_GET(str))
static inline int
single_byte_optimizable(VALUE str)
{
rb_encoding *enc;
/* Conservative. It may be ENC_CODERANGE_UNKNOWN. */
if (ENC_CODERANGE(str) == ENC_CODERANGE_7BIT)
return 1;
enc = STR_ENC_GET(str);
if (rb_enc_mbmaxlen(enc) == 1)
return 1;
/* Conservative. Possibly single byte.
* "\xa1" in Shift_JIS for example. */
return 0;
}
VALUE rb_fs;
static inline const char *
search_nonascii(const char *p, const char *e)
{
#if SIZEOF_VALUE == 8
# define NONASCII_MASK 0x8080808080808080LL
#elif SIZEOF_VALUE == 4
# define NONASCII_MASK 0x80808080UL
#endif
#ifdef NONASCII_MASK
if (sizeof(VALUE) * 2 < e - p) {
const VALUE *s, *t;
const VALUE lowbits = sizeof(VALUE) - 1;
s = (const VALUE*)(~lowbits & ((VALUE)p + lowbits));
while (p < (const char *)s) {
if (!ISASCII(*p))
return p;
p++;
}
t = (const VALUE*)(~lowbits & (VALUE)e);
while (s < t) {
if (*s & NONASCII_MASK) {
t = s;
break;
}
s++;
}
p = (const char *)t;
}
#endif
while (p < e) {
if (!ISASCII(*p))
return p;
p++;
}
return NULL;
}
static int
coderange_scan(const char *p, long len, rb_encoding *enc)
{
const char *e = p + len;
if (rb_enc_to_index(enc) == 0) {
/* enc is ASCII-8BIT. ASCII-8BIT string never be broken. */
p = search_nonascii(p, e);
return p ? ENC_CODERANGE_VALID : ENC_CODERANGE_7BIT;
}
if (rb_enc_asciicompat(enc)) {
p = search_nonascii(p, e);
if (!p) {
return ENC_CODERANGE_7BIT;
}
while (p < e) {
int ret = rb_enc_precise_mbclen(p, e, enc);
if (!MBCLEN_CHARFOUND_P(ret)) {
return ENC_CODERANGE_BROKEN;
}
p += MBCLEN_CHARFOUND_LEN(ret);
if (p < e) {
p = search_nonascii(p, e);
if (!p) {
return ENC_CODERANGE_VALID;
}
}
}
if (e < p) {
return ENC_CODERANGE_BROKEN;
}
return ENC_CODERANGE_VALID;
}
while (p < e) {
int ret = rb_enc_precise_mbclen(p, e, enc);
if (!MBCLEN_CHARFOUND_P(ret)) {
return ENC_CODERANGE_BROKEN;
}
p += MBCLEN_CHARFOUND_LEN(ret);
}
if (e < p) {
return ENC_CODERANGE_BROKEN;
}
return ENC_CODERANGE_VALID;
}
long
rb_str_coderange_scan_restartable(const char *s, const char *e, rb_encoding *enc, int *cr)
{
const char *p = s;
if (*cr == ENC_CODERANGE_BROKEN)
return e - s;
if (rb_enc_to_index(enc) == 0) {
/* enc is ASCII-8BIT. ASCII-8BIT string never be broken. */
p = search_nonascii(p, e);
*cr = (!p && *cr != ENC_CODERANGE_VALID) ? ENC_CODERANGE_7BIT : ENC_CODERANGE_VALID;
return e - s;
}
else if (rb_enc_asciicompat(enc)) {
p = search_nonascii(p, e);
if (!p) {
if (*cr != ENC_CODERANGE_VALID) *cr = ENC_CODERANGE_7BIT;
return e - s;
}
while (p < e) {
int ret = rb_enc_precise_mbclen(p, e, enc);
if (!MBCLEN_CHARFOUND_P(ret)) {
*cr = MBCLEN_INVALID_P(ret) ? ENC_CODERANGE_BROKEN: ENC_CODERANGE_UNKNOWN;
return p - s;
}
p += MBCLEN_CHARFOUND_LEN(ret);
if (p < e) {
p = search_nonascii(p, e);
if (!p) {
*cr = ENC_CODERANGE_VALID;
return e - s;
}
}
}
*cr = e < p ? ENC_CODERANGE_BROKEN: ENC_CODERANGE_VALID;
return p - s;
}
else {
while (p < e) {
int ret = rb_enc_precise_mbclen(p, e, enc);
if (!MBCLEN_CHARFOUND_P(ret)) {
*cr = MBCLEN_INVALID_P(ret) ? ENC_CODERANGE_BROKEN: ENC_CODERANGE_UNKNOWN;
return p - s;
}
p += MBCLEN_CHARFOUND_LEN(ret);
}
*cr = e < p ? ENC_CODERANGE_BROKEN: ENC_CODERANGE_VALID;
return p - s;
}
}
static inline void
str_enc_copy(VALUE str1, VALUE str2)
{
rb_enc_set_index(str1, ENCODING_GET(str2));
}
static void
rb_enc_cr_str_copy_for_substr(VALUE dest, VALUE src)
{
/* this function is designed for copying encoding and coderange
* from src to new string "dest" which is made from the part of src.
*/
str_enc_copy(dest, src);
switch (ENC_CODERANGE(src)) {
case ENC_CODERANGE_7BIT:
ENC_CODERANGE_SET(dest, ENC_CODERANGE_7BIT);
break;
case ENC_CODERANGE_VALID:
if (!rb_enc_asciicompat(STR_ENC_GET(src)) ||
search_nonascii(RSTRING_PTR(dest), RSTRING_END(dest)))
ENC_CODERANGE_SET(dest, ENC_CODERANGE_VALID);
else
ENC_CODERANGE_SET(dest, ENC_CODERANGE_7BIT);
break;
default:
if (RSTRING_LEN(dest) == 0) {
if (!rb_enc_asciicompat(STR_ENC_GET(src)))
ENC_CODERANGE_SET(dest, ENC_CODERANGE_VALID);
else
ENC_CODERANGE_SET(dest, ENC_CODERANGE_7BIT);
}
break;
}
}
static void
rb_enc_cr_str_exact_copy(VALUE dest, VALUE src)
{
str_enc_copy(dest, src);
ENC_CODERANGE_SET(dest, ENC_CODERANGE(src));
}
int
rb_enc_str_coderange(VALUE str)
{
int cr = ENC_CODERANGE(str);
if (cr == ENC_CODERANGE_UNKNOWN) {
rb_encoding *enc = STR_ENC_GET(str);
cr = coderange_scan(RSTRING_PTR(str), RSTRING_LEN(str), enc);
ENC_CODERANGE_SET(str, cr);
}
return cr;
}
int
rb_enc_str_asciionly_p(VALUE str)
{
rb_encoding *enc = STR_ENC_GET(str);
if (!rb_enc_asciicompat(enc))
return Qfalse;
else if (rb_enc_str_coderange(str) == ENC_CODERANGE_7BIT)
return Qtrue;
return Qfalse;
}
static inline void
str_mod_check(VALUE s, const char *p, long len)
{
if (RSTRING_PTR(s) != p || RSTRING_LEN(s) != len){
rb_raise(rb_eRuntimeError, "string modified");
}
}
static inline void
str_frozen_check(VALUE s)
{
if (OBJ_FROZEN(s)) {
rb_raise(rb_eRuntimeError, "string frozen");
}
}
size_t
rb_str_capacity(VALUE str)
{
if (STR_EMBED_P(str)) {
return RSTRING_EMBED_LEN_MAX;
}
else if (STR_NOCAPA_P(str)) {
return RSTRING(str)->as.heap.len;
}
else {
return RSTRING(str)->as.heap.aux.capa;
}
}
static inline VALUE
str_alloc(VALUE klass)
{
NEWOBJ(str, struct RString);
OBJSETUP(str, klass, T_STRING);
str->as.heap.ptr = 0;
str->as.heap.len = 0;
str->as.heap.aux.capa = 0;
return (VALUE)str;
}
static VALUE
str_new(VALUE klass, const char *ptr, long len)
{
VALUE str;
if (len < 0) {
rb_raise(rb_eArgError, "negative string size (or size too big)");
}
str = str_alloc(klass);
if (len > RSTRING_EMBED_LEN_MAX) {
RSTRING(str)->as.heap.aux.capa = len;
RSTRING(str)->as.heap.ptr = ALLOC_N(char,len+1);
STR_SET_NOEMBED(str);
}
else if (len == 0) {
ENC_CODERANGE_SET(str, ENC_CODERANGE_7BIT);
}
if (ptr) {
memcpy(RSTRING_PTR(str), ptr, len);
}
STR_SET_LEN(str, len);
RSTRING_PTR(str)[len] = '\0';
return str;
}
VALUE
rb_str_new(const char *ptr, long len)
{
return str_new(rb_cString, ptr, len);
}
VALUE
rb_usascii_str_new(const char *ptr, long len)
{
VALUE str = rb_str_new(ptr, len);
ENCODING_CODERANGE_SET(str, rb_usascii_encindex(), ENC_CODERANGE_7BIT);
return str;
}
VALUE
rb_enc_str_new(const char *ptr, long len, rb_encoding *enc)
{
VALUE str = rb_str_new(ptr, len);
rb_enc_associate(str, enc);
return str;
}
VALUE
rb_str_new_cstr(const char *ptr)
{
if (!ptr) {
rb_raise(rb_eArgError, "NULL pointer given");
}
return rb_str_new(ptr, strlen(ptr));
}
RUBY_ALIAS_FUNCTION(rb_str_new2(const char *ptr), rb_str_new_cstr, (ptr))
#define rb_str_new2 rb_str_new_cstr
VALUE
rb_usascii_str_new_cstr(const char *ptr)
{
VALUE str = rb_str_new2(ptr);
ENCODING_CODERANGE_SET(str, rb_usascii_encindex(), ENC_CODERANGE_7BIT);
return str;
}
RUBY_ALIAS_FUNCTION(rb_usascii_str_new2(const char *ptr), rb_usascii_str_new_cstr, (ptr))
#define rb_usascii_str_new2 rb_usascii_str_new_cstr
VALUE
rb_tainted_str_new(const char *ptr, long len)
{
VALUE str = rb_str_new(ptr, len);
OBJ_TAINT(str);
return str;
}
VALUE
rb_tainted_str_new_cstr(const char *ptr)
{
VALUE str = rb_str_new2(ptr);
OBJ_TAINT(str);
return str;
}
RUBY_ALIAS_FUNCTION(rb_tainted_str_new2(const char *ptr), rb_tainted_str_new_cstr, (ptr))
#define rb_tainted_str_new2 rb_tainted_str_new_cstr
VALUE
rb_str_conv_enc_opts(VALUE str, rb_encoding *from, rb_encoding *to, int ecflags, VALUE ecopts)
{
rb_econv_t *ec;
rb_econv_result_t ret;
long len;
VALUE newstr;
const unsigned char *sp;
unsigned char *dp;
if (!to) return str;
if (from == to) return str;
if ((rb_enc_asciicompat(to) && ENC_CODERANGE(str) == ENC_CODERANGE_7BIT) ||
to == rb_ascii8bit_encoding()) {
if (STR_ENC_GET(str) != to) {
str = rb_str_dup(str);
rb_enc_associate(str, to);
}
return str;
}
len = RSTRING_LEN(str);
newstr = rb_str_new(0, len);
retry:
ec = rb_econv_open_opts(from->name, to->name, ecflags, ecopts);
if (!ec) return str;
sp = (unsigned char*)RSTRING_PTR(str);
dp = (unsigned char*)RSTRING_PTR(newstr);
ret = rb_econv_convert(ec, &sp, (unsigned char*)RSTRING_END(str),
&dp, (unsigned char*)RSTRING_END(newstr), 0);
rb_econv_close(ec);
switch (ret) {
case econv_destination_buffer_full:
/* destination buffer short */
len *= 2;
rb_str_resize(newstr, len);
goto retry;
case econv_finished:
len = dp - (unsigned char*)RSTRING_PTR(newstr);
rb_str_set_len(newstr, len);
rb_enc_associate(newstr, to);
return newstr;
default:
/* some error, return original */
return str;
}
}
VALUE
rb_str_conv_enc(VALUE str, rb_encoding *from, rb_encoding *to)
{
return rb_str_conv_enc_opts(str, from, to, 0, Qnil);
}
VALUE
rb_external_str_new_with_enc(const char *ptr, long len, rb_encoding *eenc)
{
VALUE str;
str = rb_tainted_str_new(ptr, len);
if (eenc == rb_usascii_encoding() &&
rb_enc_str_coderange(str) != ENC_CODERANGE_7BIT) {
rb_enc_associate(str, rb_ascii8bit_encoding());
return str;
}
rb_enc_associate(str, eenc);
return rb_str_conv_enc(str, eenc, rb_default_internal_encoding());
}
VALUE
rb_external_str_new(const char *ptr, long len)
{
return rb_external_str_new_with_enc(ptr, len, rb_default_external_encoding());
}
VALUE
rb_external_str_new_cstr(const char *ptr)
{
return rb_external_str_new_with_enc(ptr, strlen(ptr), rb_default_external_encoding());
}
VALUE
rb_locale_str_new(const char *ptr, long len)
{
return rb_external_str_new_with_enc(ptr, len, rb_locale_encoding());
}
VALUE
rb_locale_str_new_cstr(const char *ptr)
{
return rb_external_str_new_with_enc(ptr, strlen(ptr), rb_locale_encoding());
}
VALUE
rb_str_export(VALUE str)
{
return rb_str_conv_enc(str, STR_ENC_GET(str), rb_default_external_encoding());
}
VALUE
rb_str_export_locale(VALUE str)
{
return rb_str_conv_enc(str, STR_ENC_GET(str), rb_locale_encoding());
}
VALUE
rb_str_export_to_enc(VALUE str, rb_encoding *enc)
{
return rb_str_conv_enc(str, STR_ENC_GET(str), enc);
}
static VALUE
str_replace_shared(VALUE str2, VALUE str)
{
if (RSTRING_LEN(str) <= RSTRING_EMBED_LEN_MAX) {
STR_SET_EMBED(str2);
memcpy(RSTRING_PTR(str2), RSTRING_PTR(str), RSTRING_LEN(str)+1);
STR_SET_EMBED_LEN(str2, RSTRING_LEN(str));
}
else {
FL_SET(str2, STR_NOEMBED);
RSTRING(str2)->as.heap.len = RSTRING_LEN(str);
RSTRING(str2)->as.heap.ptr = RSTRING_PTR(str);
RSTRING(str2)->as.heap.aux.shared = str;
FL_SET(str2, ELTS_SHARED);
}
rb_enc_cr_str_exact_copy(str2, str);
return str2;
}
static VALUE
str_new_shared(VALUE klass, VALUE str)
{
return str_replace_shared(str_alloc(klass), str);
}
static VALUE
str_new3(VALUE klass, VALUE str)
{
return str_new_shared(klass, str);
}
VALUE
rb_str_new_shared(VALUE str)
{
VALUE str2 = str_new3(rb_obj_class(str), str);
OBJ_INFECT(str2, str);
return str2;
}
RUBY_ALIAS_FUNCTION(rb_str_new3(VALUE str), rb_str_new_shared, (str))
#define rb_str_new3 rb_str_new_shared
static VALUE
str_new4(VALUE klass, VALUE str)
{
VALUE str2;
str2 = str_alloc(klass);
STR_SET_NOEMBED(str2);
RSTRING(str2)->as.heap.len = RSTRING_LEN(str);
RSTRING(str2)->as.heap.ptr = RSTRING_PTR(str);
if (STR_SHARED_P(str)) {
FL_SET(str2, ELTS_SHARED);
RSTRING(str2)->as.heap.aux.shared = RSTRING(str)->as.heap.aux.shared;
}
else {
FL_SET(str, ELTS_SHARED);
RSTRING(str)->as.heap.aux.shared = str2;
}
rb_enc_cr_str_exact_copy(str2, str);
OBJ_INFECT(str2, str);
return str2;
}
VALUE
rb_str_new_frozen(VALUE orig)
{
VALUE klass, str;
if (OBJ_FROZEN(orig)) return orig;
klass = rb_obj_class(orig);
if (STR_SHARED_P(orig) && (str = RSTRING(orig)->as.heap.aux.shared)) {
long ofs;
ofs = RSTRING_LEN(str) - RSTRING_LEN(orig);
if ((ofs > 0) || (klass != RBASIC(str)->klass) ||
(!OBJ_TAINTED(str) && OBJ_TAINTED(orig))) {
str = str_new3(klass, str);
RSTRING(str)->as.heap.ptr += ofs;
RSTRING(str)->as.heap.len -= ofs;
}
rb_enc_cr_str_exact_copy(str, orig);
OBJ_INFECT(str, orig);
}
else if (STR_EMBED_P(orig)) {
str = str_new(klass, RSTRING_PTR(orig), RSTRING_LEN(orig));
rb_enc_cr_str_exact_copy(str, orig);
OBJ_INFECT(str, orig);
}
else if (STR_ASSOC_P(orig)) {
VALUE assoc = RSTRING(orig)->as.heap.aux.shared;
FL_UNSET(orig, STR_ASSOC);
str = str_new4(klass, orig);
FL_SET(str, STR_ASSOC);
RSTRING(str)->as.heap.aux.shared = assoc;
}
else {
str = str_new4(klass, orig);
}
OBJ_FREEZE(str);
return str;
}
RUBY_ALIAS_FUNCTION(rb_str_new4(VALUE orig), rb_str_new_frozen, (orig))
#define rb_str_new4 rb_str_new_frozen
VALUE
rb_str_new_with_class(VALUE obj, const char *ptr, long len)
{
return str_new(rb_obj_class(obj), ptr, len);
}
RUBY_ALIAS_FUNCTION(rb_str_new5(VALUE obj, const char *ptr, long len),
rb_str_new_with_class, (obj, ptr, len))
#define rb_str_new5 rb_str_new_with_class
#define STR_BUF_MIN_SIZE 128
VALUE
rb_str_buf_new(long capa)
{
VALUE str = str_alloc(rb_cString);
if (capa < STR_BUF_MIN_SIZE) {
capa = STR_BUF_MIN_SIZE;
}
FL_SET(str, STR_NOEMBED);
RSTRING(str)->as.heap.aux.capa = capa;
RSTRING(str)->as.heap.ptr = ALLOC_N(char, capa+1);
RSTRING(str)->as.heap.ptr[0] = '\0';
return str;
}
VALUE
rb_str_buf_new_cstr(const char *ptr)
{
VALUE str;
long len = strlen(ptr);
str = rb_str_buf_new(len);
rb_str_buf_cat(str, ptr, len);
return str;
}
RUBY_ALIAS_FUNCTION(rb_str_buf_new2(const char *ptr), rb_str_buf_new_cstr, (ptr))
#define rb_str_buf_new2 rb_str_buf_new_cstr
VALUE
rb_str_tmp_new(long len)
{
return str_new(0, 0, len);
}
void
rb_str_free(VALUE str)
{
if (!STR_EMBED_P(str) && !STR_SHARED_P(str)) {
xfree(RSTRING(str)->as.heap.ptr);
}
}
VALUE
rb_str_to_str(VALUE str)
{
return rb_convert_type(str, T_STRING, "String", "to_str");
}
static inline void str_discard(VALUE str);
void
rb_str_shared_replace(VALUE str, VALUE str2)
{
rb_encoding *enc;
int cr;
if (str == str2) return;
enc = STR_ENC_GET(str2);
cr = ENC_CODERANGE(str2);
str_discard(str);
OBJ_INFECT(str, str2);
if (RSTRING_LEN(str2) <= RSTRING_EMBED_LEN_MAX) {
STR_SET_EMBED(str);
memcpy(RSTRING_PTR(str), RSTRING_PTR(str2), RSTRING_LEN(str2)+1);
STR_SET_EMBED_LEN(str, RSTRING_LEN(str2));
rb_enc_associate(str, enc);
ENC_CODERANGE_SET(str, cr);
return;
}
STR_SET_NOEMBED(str);
STR_UNSET_NOCAPA(str);
RSTRING(str)->as.heap.ptr = RSTRING_PTR(str2);
RSTRING(str)->as.heap.len = RSTRING_LEN(str2);
if (STR_NOCAPA_P(str2)) {
FL_SET(str, RBASIC(str2)->flags & STR_NOCAPA);
RSTRING(str)->as.heap.aux.shared = RSTRING(str2)->as.heap.aux.shared;
}
else {
RSTRING(str)->as.heap.aux.capa = RSTRING(str2)->as.heap.aux.capa;
}
STR_SET_EMBED(str2); /* abandon str2 */
RSTRING_PTR(str2)[0] = 0;
STR_SET_EMBED_LEN(str2, 0);
rb_enc_associate(str, enc);
ENC_CODERANGE_SET(str, cr);
}
static ID id_to_s;
VALUE
rb_obj_as_string(VALUE obj)
{
VALUE str;
if (TYPE(obj) == T_STRING) {
return obj;
}
str = rb_funcall(obj, id_to_s, 0);
if (TYPE(str) != T_STRING)
return rb_any_to_s(obj);
if (OBJ_TAINTED(obj)) OBJ_TAINT(str);
return str;
}
static VALUE
str_duplicate(VALUE klass, VALUE str)
{
VALUE dup = str_alloc(klass);
rb_str_replace(dup, str);
return dup;
}
VALUE
rb_str_dup(VALUE str)
{
return str_duplicate(rb_obj_class(str), str);
}
VALUE
rb_str_resurrect(VALUE str)
{
return rb_str_replace(str_alloc(rb_cString), str);
}
/*
* call-seq:
* String.new(str="") => new_str
*
* Returns a new string object containing a copy of <i>str</i>.
*/
static VALUE
rb_str_init(int argc, VALUE *argv, VALUE str)
{
VALUE orig;
if (argc > 0 && rb_scan_args(argc, argv, "01", &orig) == 1)
rb_str_replace(str, orig);
return str;
}
long
rb_enc_strlen(const char *p, const char *e, rb_encoding *enc)
{
long c;
const char *q;
if (rb_enc_mbmaxlen(enc) == rb_enc_mbminlen(enc)) {
return (e - p + rb_enc_mbminlen(enc) - 1) / rb_enc_mbminlen(enc);
}
else if (rb_enc_asciicompat(enc)) {
c = 0;
while (p < e) {
if (ISASCII(*p)) {
q = search_nonascii(p, e);
if (!q)
return c + (e - p);
c += q - p;
p = q;
}
p += rb_enc_mbclen(p, e, enc);
c++;
}
return c;
}
for (c=0; p<e; c++) {
p += rb_enc_mbclen(p, e, enc);
}
return c;
}
long
rb_enc_strlen_cr(const char *p, const char *e, rb_encoding *enc, int *cr)
{
long c;
const char *q;
int ret;
*cr = 0;
if (rb_enc_mbmaxlen(enc) == rb_enc_mbminlen(enc)) {
return (e - p + rb_enc_mbminlen(enc) - 1) / rb_enc_mbminlen(enc);
}
else if (rb_enc_asciicompat(enc)) {
c = 0;
while (p < e) {
if (ISASCII(*p)) {
q = search_nonascii(p, e);
if (!q) {
if (!*cr) *cr = ENC_CODERANGE_7BIT;
return c + (e - p);
}
c += q - p;
p = q;
}
ret = rb_enc_precise_mbclen(p, e, enc);
if (MBCLEN_CHARFOUND_P(ret)) {
*cr |= ENC_CODERANGE_VALID;
p += MBCLEN_CHARFOUND_LEN(ret);
}
else {
*cr = ENC_CODERANGE_BROKEN;
p++;
}
c++;
}
if (!*cr) *cr = ENC_CODERANGE_7BIT;
return c;
}
for (c=0; p<e; c++) {
ret = rb_enc_precise_mbclen(p, e, enc);
if (MBCLEN_CHARFOUND_P(ret)) {
*cr |= ENC_CODERANGE_VALID;
p += MBCLEN_CHARFOUND_LEN(ret);
}
else {
*cr = ENC_CODERANGE_BROKEN;
p++;
}
}
if (!*cr) *cr = ENC_CODERANGE_7BIT;
return c;
}
#ifdef NONASCII_MASK
#define is_utf8_lead_byte(c) (((c)&0xC0) != 0x80)
static inline VALUE
count_utf8_lead_bytes_with_word(const VALUE *s)
{
VALUE d = *s;
d |= ~(d>>1);
d >>= 6;
d &= NONASCII_MASK >> 7;
d += (d>>8);
d += (d>>16);
#if SIZEOF_VALUE == 8
d += (d>>32);
#endif
return (d&0xF);
}
#endif
static long
str_strlen(VALUE str, rb_encoding *enc)
{
const char *p, *e;
int n, cr;
if (single_byte_optimizable(str)) return RSTRING_LEN(str);
if (!enc) enc = STR_ENC_GET(str);
p = RSTRING_PTR(str);
e = RSTRING_END(str);
#ifdef NONASCII_MASK
if (ENC_CODERANGE(str) == ENC_CODERANGE_VALID &&
enc == rb_utf8_encoding()) {
VALUE len = 0;
if (sizeof(VALUE) * 2 < e - p) {
const VALUE *s, *t;
const VALUE lowbits = sizeof(VALUE) - 1;
s = (const VALUE*)(~lowbits & ((VALUE)p + lowbits));
t = (const VALUE*)(~lowbits & (VALUE)e);
while (p < (const char *)s) {
if (is_utf8_lead_byte(*p)) len++;
p++;
}
while (s < t) {
len += count_utf8_lead_bytes_with_word(s);
s++;
}
p = (const char *)s;
}
while (p < e) {
if (is_utf8_lead_byte(*p)) len++;
p++;
}
return (long)len;
}
#endif
n = rb_enc_strlen_cr(p, e, enc, &cr);
if (cr) {
ENC_CODERANGE_SET(str, cr);
}
return n;
}
/*
* call-seq:
* str.length => integer
* str.size => integer
*
* Returns the character length of <i>str</i>.
*/
VALUE
rb_str_length(VALUE str)
{
int len;
len = str_strlen(str, STR_ENC_GET(str));
return INT2NUM(len);
}
/*
* call-seq:
* str.bytesize => integer
*
* Returns the length of <i>str</i> in bytes.
*/
static VALUE
rb_str_bytesize(VALUE str)
{
return INT2NUM(RSTRING_LEN(str));
}
/*
* call-seq:
* str.empty? => true or false
*
* Returns <code>true</code> if <i>str</i> has a length of zero.
*
* "hello".empty? #=> false
* "".empty? #=> true
*/
static VALUE
rb_str_empty(VALUE str)
{
if (RSTRING_LEN(str) == 0)
return Qtrue;
return Qfalse;
}
/*
* call-seq:
* str + other_str => new_str
*
* Concatenation---Returns a new <code>String</code> containing
* <i>other_str</i> concatenated to <i>str</i>.
*
* "Hello from " + self.to_s #=> "Hello from main"
*/
VALUE
rb_str_plus(VALUE str1, VALUE str2)
{
VALUE str3;
rb_encoding *enc;
StringValue(str2);
enc = rb_enc_check(str1, str2);
str3 = rb_str_new(0, RSTRING_LEN(str1)+RSTRING_LEN(str2));
memcpy(RSTRING_PTR(str3), RSTRING_PTR(str1), RSTRING_LEN(str1));
memcpy(RSTRING_PTR(str3) + RSTRING_LEN(str1),
RSTRING_PTR(str2), RSTRING_LEN(str2));
RSTRING_PTR(str3)[RSTRING_LEN(str3)] = '\0';
if (OBJ_TAINTED(str1) || OBJ_TAINTED(str2))
OBJ_TAINT(str3);
ENCODING_CODERANGE_SET(str3, rb_enc_to_index(enc),
ENC_CODERANGE_AND(ENC_CODERANGE(str1), ENC_CODERANGE(str2)));
return str3;
}
/*
* call-seq:
* str * integer => new_str
*
* Copy---Returns a new <code>String</code> containing <i>integer</i> copies of
* the receiver.
*
* "Ho! " * 3 #=> "Ho! Ho! Ho! "
*/
VALUE
rb_str_times(VALUE str, VALUE times)
{
VALUE str2;
long n, len;
len = NUM2LONG(times);
if (len < 0) {
rb_raise(rb_eArgError, "negative argument");
}
if (len && LONG_MAX/len < RSTRING_LEN(str)) {
rb_raise(rb_eArgError, "argument too big");
}
str2 = rb_str_new5(str, 0, len *= RSTRING_LEN(str));
if (len) {
n = RSTRING_LEN(str);
memcpy(RSTRING_PTR(str2), RSTRING_PTR(str), n);
while (n <= len/2) {
memcpy(RSTRING_PTR(str2) + n, RSTRING_PTR(str2), n);
n *= 2;
}
memcpy(RSTRING_PTR(str2) + n, RSTRING_PTR(str2), len-n);
}
RSTRING_PTR(str2)[RSTRING_LEN(str2)] = '\0';
OBJ_INFECT(str2, str);
rb_enc_cr_str_copy_for_substr(str2, str);
return str2;
}
/*
* call-seq:
* str % arg => new_str
*
* Format---Uses <i>str</i> as a format specification, and returns the result
* of applying it to <i>arg</i>. If the format specification contains more than
* one substitution, then <i>arg</i> must be an <code>Array</code> containing
* the values to be substituted. See <code>Kernel::sprintf</code> for details
* of the format string.
*
* "%05d" % 123 #=> "00123"
* "%-5s: %08x" % [ "ID", self.object_id ] #=> "ID : 200e14d6"
*/
static VALUE
rb_str_format_m(VALUE str, VALUE arg)
{
volatile VALUE tmp = rb_check_array_type(arg);
if (!NIL_P(tmp)) {
return rb_str_format(RARRAY_LEN(tmp), RARRAY_PTR(tmp), str);
}
return rb_str_format(1, &arg, str);
}
static inline void
str_modifiable(VALUE str)
{
if (FL_TEST(str, STR_TMPLOCK)) {
rb_raise(rb_eRuntimeError, "can't modify string; temporarily locked");
}
if (OBJ_FROZEN(str)) rb_error_frozen("string");
if (!OBJ_UNTRUSTED(str) && rb_safe_level() >= 4)
rb_raise(rb_eSecurityError, "Insecure: can't modify string");
}
static inline int
str_independent(VALUE str)
{
str_modifiable(str);
if (!STR_SHARED_P(str)) return 1;
if (STR_EMBED_P(str)) return 1;
return 0;
}
static void
str_make_independent(VALUE str)
{
char *ptr;
long len = RSTRING_LEN(str);
ptr = ALLOC_N(char, len+1);
if (RSTRING_PTR(str)) {
memcpy(ptr, RSTRING_PTR(str), len);
}
STR_SET_NOEMBED(str);
ptr[len] = 0;
RSTRING(str)->as.heap.ptr = ptr;
RSTRING(str)->as.heap.len = len;
RSTRING(str)->as.heap.aux.capa = len;
STR_UNSET_NOCAPA(str);
}
void
rb_str_modify(VALUE str)
{
if (!str_independent(str))
str_make_independent(str);
ENC_CODERANGE_CLEAR(str);
}
/* As rb_str_modify(), but don't clear coderange */
static void
str_modify_keep_cr(VALUE str)
{
if (!str_independent(str))
str_make_independent(str);
if (ENC_CODERANGE(str) == ENC_CODERANGE_BROKEN)
/* Force re-scan later */
ENC_CODERANGE_CLEAR(str);
}
static inline void
str_discard(VALUE str)
{
str_modifiable(str);
if (!STR_SHARED_P(str) && !STR_EMBED_P(str)) {
xfree(RSTRING_PTR(str));
RSTRING(str)->as.heap.ptr = 0;
RSTRING(str)->as.heap.len = 0;
}
}
void
rb_str_associate(VALUE str, VALUE add)
{
/* sanity check */
if (OBJ_FROZEN(str)) rb_error_frozen("string");
if (STR_ASSOC_P(str)) {
/* already associated */
rb_ary_concat(RSTRING(str)->as.heap.aux.shared, add);
}
else {
if (STR_SHARED_P(str)) {
VALUE assoc = RSTRING(str)->as.heap.aux.shared;
str_make_independent(str);
if (STR_ASSOC_P(assoc)) {
assoc = RSTRING(assoc)->as.heap.aux.shared;
rb_ary_concat(assoc, add);
add = assoc;
}
}
else if (STR_EMBED_P(str)) {
str_make_independent(str);
}
else if (RSTRING(str)->as.heap.aux.capa != RSTRING_LEN(str)) {
RESIZE_CAPA(str, RSTRING_LEN(str));
}
FL_SET(str, STR_ASSOC);
RBASIC(add)->klass = 0;
RSTRING(str)->as.heap.aux.shared = add;
}
}
VALUE
rb_str_associated(VALUE str)
{
if (STR_SHARED_P(str)) str = RSTRING(str)->as.heap.aux.shared;
if (STR_ASSOC_P(str)) {
return RSTRING(str)->as.heap.aux.shared;
}
return Qfalse;
}
VALUE
rb_string_value(volatile VALUE *ptr)
{
VALUE s = *ptr;
if (TYPE(s) != T_STRING) {
if (SYMBOL_P(s)) {
s = rb_sym_to_s(s);
}
else {
s = rb_str_to_str(s);
}
*ptr = s;
}
return s;
}
char *
rb_string_value_ptr(volatile VALUE *ptr)
{
VALUE str = rb_string_value(ptr);
return RSTRING_PTR(str);
}
char *
rb_string_value_cstr(volatile VALUE *ptr)
{
VALUE str = rb_string_value(ptr);
char *s = RSTRING_PTR(str);
if (!s || RSTRING_LEN(str) != strlen(s)) {
rb_raise(rb_eArgError, "string contains null byte");
}
return s;
}
VALUE
rb_check_string_type(VALUE str)
{
str = rb_check_convert_type(str, T_STRING, "String", "to_str");
return str;
}
/*
* call-seq:
* String.try_convert(obj) -> string or nil
*
* Try to convert <i>obj</i> into a String, using to_str method.
* Returns converted regexp or nil if <i>obj</i> cannot be converted
* for any reason.
*
* String.try_convert("str") # => str
* String.try_convert(/re/) # => nil
*/
static VALUE
rb_str_s_try_convert(VALUE dummy, VALUE str)
{
return rb_check_string_type(str);
}
char*
rb_enc_nth(const char *p, const char *e, int nth, rb_encoding *enc)
{
if (rb_enc_mbmaxlen(enc) == 1) {
p += nth;
}
else if (rb_enc_mbmaxlen(enc) == rb_enc_mbminlen(enc)) {
p += nth * rb_enc_mbmaxlen(enc);
}
else if (rb_enc_asciicompat(enc)) {
const char *p2, *e2;
int n;
while (p < e && 0 < nth) {
e2 = p + nth;
if (e < e2)
return (char *)e;
if (ISASCII(*p)) {
p2 = search_nonascii(p, e2);
if (!p2)
return (char *)e2;
nth -= p2 - p;
p = p2;
}
n = rb_enc_mbclen(p, e, enc);
p += n;
nth--;
}
if (nth != 0)
return (char *)e;
return (char *)p;
}
else {
while (p<e && nth--) {
p += rb_enc_mbclen(p, e, enc);
}
}
if (p > e) p = e;
return (char*)p;
}
static char*
str_nth(const char *p, const char *e, int nth, rb_encoding *enc, int singlebyte)
{
if (singlebyte)
p += nth;
else {
p = rb_enc_nth(p, e, nth, enc);
}
if (!p) return 0;
if (p > e) p = e;
return (char *)p;
}
/* char offset to byte offset */
static int
str_offset(const char *p, const char *e, int nth, rb_encoding *enc, int singlebyte)
{
const char *pp = str_nth(p, e, nth, enc, singlebyte);
if (!pp) return e - p;
return pp - p;
}
#ifdef NONASCII_MASK
static char *
str_utf8_nth(const char *p, const char *e, int nth)
{
if (sizeof(VALUE) * 2 < nth) {
const VALUE *s, *t;
const VALUE lowbits = sizeof(VALUE) - 1;
s = (const VALUE*)(~lowbits & ((VALUE)p + lowbits));
t = (const VALUE*)(~lowbits & (VALUE)e);
while (p < (const char *)s) {
if (is_utf8_lead_byte(*p)) nth--;
p++;
}
do {
nth -= count_utf8_lead_bytes_with_word(s);
s++;
} while (s < t && sizeof(VALUE) <= nth);
p = (char *)s;
}
while (p < e) {
if (is_utf8_lead_byte(*p)) {
if (nth == 0) break;
nth--;
}
p++;
}
return (char *)p;
}
static int
str_utf8_offset(const char *p, const char *e, int nth)
{
const char *pp = str_utf8_nth(p, e, nth);
if (!pp) return e - p;
return pp - p;
}
#endif
/* byte offset to char offset */
long
rb_str_sublen(VALUE str, long pos)
{
if (single_byte_optimizable(str) || pos < 0)
return pos;
else {
char *p = RSTRING_PTR(str);
return rb_enc_strlen(p, p + pos, STR_ENC_GET(str));
}
}
VALUE
rb_str_subseq(VALUE str, long beg, long len)
{
VALUE str2;
if (RSTRING_LEN(str) == beg + len &&
RSTRING_EMBED_LEN_MAX < len) {
str2 = rb_str_new_shared(rb_str_new_frozen(str));
rb_str_drop_bytes(str2, beg);
}
else {
str2 = rb_str_new5(str, RSTRING_PTR(str)+beg, len);
}
rb_enc_cr_str_copy_for_substr(str2, str);
OBJ_INFECT(str2, str);
return str2;
}
VALUE
rb_str_substr(VALUE str, long beg, long len)
{
rb_encoding *enc = STR_ENC_GET(str);
VALUE str2;
char *p, *s = RSTRING_PTR(str), *e = s + RSTRING_LEN(str);
if (len < 0) return Qnil;
if (!RSTRING_LEN(str)) {
len = 0;
}
if (single_byte_optimizable(str)) {
if (beg > RSTRING_LEN(str)) return Qnil;
if (beg < 0) {
beg += RSTRING_LEN(str);
if (beg < 0) return Qnil;
}
if (beg + len > RSTRING_LEN(str))
len = RSTRING_LEN(str) - beg;
if (len <= 0) {
len = 0;
p = 0;
}
else
p = s + beg;
goto sub;
}
if (beg < 0) {
if (len > -beg) len = -beg;
if (-beg * rb_enc_mbmaxlen(enc) < RSTRING_LEN(str) / 8) {
beg = -beg;
while (beg-- > len && (e = rb_enc_prev_char(s, e, e, enc)) != 0);
p = e;
if (!p) return Qnil;
while (len-- > 0 && (p = rb_enc_prev_char(s, p, e, enc)) != 0);
if (!p) return Qnil;
len = e - p;
goto sub;
}
else {
beg += str_strlen(str, enc);
if (beg < 0) return Qnil;
}
}
else if (beg > 0 && beg > str_strlen(str, enc)) {
return Qnil;
}
if (len == 0) {
p = 0;
}
#ifdef NONASCII_MASK
else if (ENC_CODERANGE(str) == ENC_CODERANGE_VALID &&
enc == rb_utf8_encoding()) {
p = str_utf8_nth(s, e, beg);
len = str_utf8_offset(p, e, len);
}
#endif
else if (rb_enc_mbmaxlen(enc) == rb_enc_mbminlen(enc)) {
int char_sz = rb_enc_mbmaxlen(enc);
p = s + beg * char_sz;
if (p > e) {
p = e;
len = 0;
}
else if (len * char_sz > e - p)
len = e - p;
else
len *= char_sz;
}
else if ((p = str_nth(s, e, beg, enc, 0)) == e) {
len = 0;
}
else {
len = str_offset(p, e, len, enc, 0);
}
sub:
if (len > RSTRING_EMBED_LEN_MAX && beg + len == RSTRING_LEN(str)) {
str2 = rb_str_new4(str);
str2 = str_new3(rb_obj_class(str2), str2);
RSTRING(str2)->as.heap.ptr += RSTRING(str2)->as.heap.len - len;
RSTRING(str2)->as.heap.len = len;
}
else {
str2 = rb_str_new5(str, p, len);
rb_enc_cr_str_copy_for_substr(str2, str);
OBJ_INFECT(str2, str);
}
return str2;
}
VALUE
rb_str_freeze(VALUE str)
{
if (STR_ASSOC_P(str)) {
VALUE ary = RSTRING(str)->as.heap.aux.shared;
OBJ_FREEZE(ary);
}
return rb_obj_freeze(str);
}
RUBY_ALIAS_FUNCTION(rb_str_dup_frozen(VALUE str), rb_str_new_frozen, (str))
#define rb_str_dup_frozen rb_str_new_frozen
VALUE
rb_str_locktmp(VALUE str)
{
if (FL_TEST(str, STR_TMPLOCK)) {
rb_raise(rb_eRuntimeError, "temporal locking already locked string");
}
FL_SET(str, STR_TMPLOCK);
return str;
}
VALUE
rb_str_unlocktmp(VALUE str)
{
if (!FL_TEST(str, STR_TMPLOCK)) {
rb_raise(rb_eRuntimeError, "temporal unlocking already unlocked string");
}
FL_UNSET(str, STR_TMPLOCK);
return str;
}
void
rb_str_set_len(VALUE str, long len)
{
STR_SET_LEN(str, len);
RSTRING_PTR(str)[len] = '\0';
}
VALUE
rb_str_resize(VALUE str, long len)
{
long slen;
if (len < 0) {
rb_raise(rb_eArgError, "negative string size (or size too big)");
}
rb_str_modify(str);
slen = RSTRING_LEN(str);
if (len != slen) {
if (STR_EMBED_P(str)) {
char *ptr;
if (len <= RSTRING_EMBED_LEN_MAX) {
STR_SET_EMBED_LEN(str, len);
RSTRING(str)->as.ary[len] = '\0';
return str;
}
ptr = ALLOC_N(char,len+1);
MEMCPY(ptr, RSTRING(str)->as.ary, char, slen);
RSTRING(str)->as.heap.ptr = ptr;
STR_SET_NOEMBED(str);
}
else if (len <= RSTRING_EMBED_LEN_MAX) {
char *ptr = RSTRING(str)->as.heap.ptr;
STR_SET_EMBED(str);
if (slen > 0) MEMCPY(RSTRING(str)->as.ary, ptr, char, len);
RSTRING(str)->as.ary[len] = '\0';
STR_SET_EMBED_LEN(str, len);
xfree(ptr);
return str;
}
else if (slen < len || slen - len > 1024) {
REALLOC_N(RSTRING(str)->as.heap.ptr, char, len+1);
}
if (!STR_NOCAPA_P(str)) {
RSTRING(str)->as.heap.aux.capa = len;
}
RSTRING(str)->as.heap.len = len;
RSTRING(str)->as.heap.ptr[len] = '\0'; /* sentinel */
}
return str;
}
static VALUE
str_buf_cat(VALUE str, const char *ptr, long len)
{
long capa, total, off = -1;
if (ptr >= RSTRING_PTR(str) && ptr <= RSTRING_END(str)) {
off = ptr - RSTRING_PTR(str);
}
rb_str_modify(str);
if (len == 0) return 0;
if (STR_ASSOC_P(str)) {
FL_UNSET(str, STR_ASSOC);
capa = RSTRING(str)->as.heap.aux.capa = RSTRING_LEN(str);
}
else if (STR_EMBED_P(str)) {
capa = RSTRING_EMBED_LEN_MAX;
}
else {
capa = RSTRING(str)->as.heap.aux.capa;
}
if (RSTRING_LEN(str) >= LONG_MAX - len) {
rb_raise(rb_eArgError, "string sizes too big");
}
total = RSTRING_LEN(str)+len;
if (capa <= total) {
while (total > capa) {
if (capa + 1 >= LONG_MAX / 2) {
capa = (total + 4095) / 4096;
break;
}
capa = (capa + 1) * 2;
}
RESIZE_CAPA(str, capa);
}
if (off != -1) {
ptr = RSTRING_PTR(str) + off;
}
memcpy(RSTRING_PTR(str) + RSTRING_LEN(str), ptr, len);
STR_SET_LEN(str, total);
RSTRING_PTR(str)[total] = '\0'; /* sentinel */
return str;
}
VALUE
rb_str_buf_cat(VALUE str, const char *ptr, long len)
{
if (len == 0) return str;
if (len < 0) {
rb_raise(rb_eArgError, "negative string size (or size too big)");
}
return str_buf_cat(str, ptr, len);
}
VALUE
rb_str_buf_cat2(VALUE str, const char *ptr)
{
return rb_str_buf_cat(str, ptr, strlen(ptr));
}
VALUE
rb_str_cat(VALUE str, const char *ptr, long len)
{
if (len < 0) {
rb_raise(rb_eArgError, "negative string size (or size too big)");
}
if (STR_ASSOC_P(str)) {
rb_str_modify(str);
if (STR_EMBED_P(str)) str_make_independent(str);
REALLOC_N(RSTRING(str)->as.heap.ptr, char, RSTRING(str)->as.heap.len+len+1);
memcpy(RSTRING(str)->as.heap.ptr + RSTRING(str)->as.heap.len, ptr, len);
RSTRING(str)->as.heap.len += len;
RSTRING(str)->as.heap.ptr[RSTRING(str)->as.heap.len] = '\0'; /* sentinel */
return str;
}
return rb_str_buf_cat(str, ptr, len);
}
VALUE
rb_str_cat2(VALUE str, const char *ptr)
{
return rb_str_cat(str, ptr, strlen(ptr));
}
static VALUE
rb_enc_cr_str_buf_cat(VALUE str, const char *ptr, long len,
int ptr_encindex, int ptr_cr, int *ptr_cr_ret)
{
int str_encindex = ENCODING_GET(str);
int res_encindex;
int str_cr, res_cr;
int str_a8 = ENCODING_IS_ASCII8BIT(str);
int ptr_a8 = ptr_encindex == 0;
str_cr = ENC_CODERANGE(str);
if (str_encindex == ptr_encindex) {
if (str_cr == ENC_CODERANGE_UNKNOWN ||
(ptr_a8 && str_cr != ENC_CODERANGE_7BIT)) {
ptr_cr = ENC_CODERANGE_UNKNOWN;
}
else if (ptr_cr == ENC_CODERANGE_UNKNOWN) {
ptr_cr = coderange_scan(ptr, len, rb_enc_from_index(ptr_encindex));
}
}
else {
rb_encoding *str_enc = rb_enc_from_index(str_encindex);
rb_encoding *ptr_enc = rb_enc_from_index(ptr_encindex);
if (!rb_enc_asciicompat(str_enc) || !rb_enc_asciicompat(ptr_enc)) {
if (len == 0)
return str;
if (RSTRING_LEN(str) == 0) {
rb_str_buf_cat(str, ptr, len);
ENCODING_CODERANGE_SET(str, ptr_encindex, ptr_cr);
return str;
}
goto incompatible;
}
if (ptr_cr == ENC_CODERANGE_UNKNOWN) {
ptr_cr = coderange_scan(ptr, len, ptr_enc);
}
if (str_cr == ENC_CODERANGE_UNKNOWN) {
if (str_a8 || ptr_cr != ENC_CODERANGE_7BIT) {
str_cr = rb_enc_str_coderange(str);
}
}
}
if (ptr_cr_ret)
*ptr_cr_ret = ptr_cr;
if (str_encindex != ptr_encindex &&
str_cr != ENC_CODERANGE_7BIT &&
ptr_cr != ENC_CODERANGE_7BIT) {
incompatible:
rb_raise(rb_eEncCompatError, "incompatible character encodings: %s and %s",
rb_enc_name(rb_enc_from_index(str_encindex)),
rb_enc_name(rb_enc_from_index(ptr_encindex)));
}
if (str_cr == ENC_CODERANGE_UNKNOWN) {
res_encindex = str_encindex;
res_cr = ENC_CODERANGE_UNKNOWN;
}
else if (str_cr == ENC_CODERANGE_7BIT) {
if (ptr_cr == ENC_CODERANGE_7BIT) {
res_encindex = !str_a8 ? str_encindex : ptr_encindex;
res_cr = ENC_CODERANGE_7BIT;
}
else {
res_encindex = ptr_encindex;
res_cr = ptr_cr;
}
}
else if (str_cr == ENC_CODERANGE_VALID) {
res_encindex = str_encindex;
res_cr = str_cr;
}
else { /* str_cr == ENC_CODERANGE_BROKEN */
res_encindex = str_encindex;
res_cr = str_cr;
if (0 < len) res_cr = ENC_CODERANGE_UNKNOWN;
}
if (len < 0) {
rb_raise(rb_eArgError, "negative string size (or size too big)");
}
str_buf_cat(str, ptr, len);
ENCODING_CODERANGE_SET(str, res_encindex, res_cr);
return str;
}
VALUE
rb_enc_str_buf_cat(VALUE str, const char *ptr, long len, rb_encoding *ptr_enc)
{
return rb_enc_cr_str_buf_cat(str, ptr, len,
rb_enc_to_index(ptr_enc), ENC_CODERANGE_UNKNOWN, NULL);
}
VALUE
rb_str_buf_cat_ascii(VALUE str, const char *ptr)
{
/* ptr must reference NUL terminated ASCII string. */
int encindex = ENCODING_GET(str);
rb_encoding *enc = rb_enc_from_index(encindex);
if (rb_enc_asciicompat(enc)) {
return rb_enc_cr_str_buf_cat(str, ptr, strlen(ptr),
encindex, ENC_CODERANGE_7BIT, 0);
}
else {
char *buf = ALLOCA_N(char, rb_enc_mbmaxlen(enc));
while (*ptr) {
unsigned int c = (unsigned char)*ptr;
int len = rb_enc_codelen(c, enc);
rb_enc_mbcput(c, buf, enc);
rb_enc_cr_str_buf_cat(str, buf, len,
encindex, ENC_CODERANGE_VALID, 0);
ptr++;
}
return str;
}
}
VALUE
rb_str_buf_append(VALUE str, VALUE str2)
{
int str2_cr;
str2_cr = ENC_CODERANGE(str2);
rb_enc_cr_str_buf_cat(str, RSTRING_PTR(str2), RSTRING_LEN(str2),
ENCODING_GET(str2), str2_cr, &str2_cr);
OBJ_INFECT(str, str2);
ENC_CODERANGE_SET(str2, str2_cr);
return str;
}
VALUE
rb_str_append(VALUE str, VALUE str2)
{
rb_encoding *enc;
int cr, cr2;
StringValue(str2);
if (RSTRING_LEN(str2) > 0 && STR_ASSOC_P(str)) {
long len = RSTRING_LEN(str)+RSTRING_LEN(str2);
enc = rb_enc_check(str, str2);
cr = ENC_CODERANGE(str);
if ((cr2 = ENC_CODERANGE(str2)) > cr) cr = cr2;
rb_str_modify(str);
REALLOC_N(RSTRING(str)->as.heap.ptr, char, len+1);
memcpy(RSTRING(str)->as.heap.ptr + RSTRING(str)->as.heap.len,
RSTRING_PTR(str2), RSTRING_LEN(str2)+1);
RSTRING(str)->as.heap.len = len;
rb_enc_associate(str, enc);
ENC_CODERANGE_SET(str, cr);
OBJ_INFECT(str, str2);
return str;
}
return rb_str_buf_append(str, str2);
}
/*
* call-seq:
* str << integer => str
* str.concat(integer) => str
* str << obj => str
* str.concat(obj) => str
*
* Append---Concatenates the given object to <i>str</i>. If the object is a
* <code>Integer</code>, it is considered as a codepoint, and is converted
* to a character before concatenation.
*
* a = "hello "
* a << "world" #=> "hello world"
* a.concat(33) #=> "hello world!"
*/
VALUE
rb_str_concat(VALUE str1, VALUE str2)
{
if (FIXNUM_P(str2) || TYPE(str2) == T_BIGNUM) {
rb_encoding *enc = STR_ENC_GET(str1);
unsigned int c = NUM2UINT(str2);
int pos = RSTRING_LEN(str1);
int len = rb_enc_codelen(c, enc);
int cr = ENC_CODERANGE(str1);
rb_str_resize(str1, pos+len);
rb_enc_mbcput(c, RSTRING_PTR(str1)+pos, enc);
ENC_CODERANGE_SET(str1, cr);
return str1;
}
return rb_str_append(str1, str2);
}
#ifndef UNALIGNED_WORD_ACCESS
# if defined __i386__ || defined _M_IX86
# define UNALIGNED_WORD_ACCESS 1
# endif
#endif
#ifndef UNALIGNED_WORD_ACCESS
# define UNALIGNED_WORD_ACCESS 0
#endif
/* MurmurHash described in http://murmurhash.googlepages.com/ */
#ifndef MURMUR
#define MURMUR 2
#endif
#define MurmurMagic 0x7fd652ad
static inline unsigned int
murmur(unsigned int h, unsigned int k, int r)
{
const unsigned int m = MurmurMagic;
#if MURMUR == 1
h += k;
h *= m;
h ^= h >> r;
#elif MURMUR == 2
k *= m;
k ^= k >> r;
k *= m;
h *= m;
h ^= k;
#endif
return h;
}
#define murmur16(h) murmur_step(h, 16)
static inline unsigned int
murmur_finish(unsigned int h)
{
#if MURMUR == 1
h = murmur(h, 0, 10);
h = murmur(h, 0, 17);
#elif MURMUR == 2
h ^= h >> 13;
h *= MurmurMagic;
h ^= h >> 15;
#endif
return h;
}
#define murmur_step(h, k) murmur(h, k, 16)
static unsigned int
hash(const unsigned char * data, int len, unsigned int h)
{
uint32_t t = 0;
h += 0xdeadbeef;
#ifdef WORDS_BIGENDIAN
# define SHIFT_OFFSET(i) ((i)*CHAR_BIT)
#else
# define SHIFT_OFFSET(i) (32-(i)*CHAR_BIT)
#endif
if (len >= sizeof(uint32_t)) {
#if !UNALIGNED_WORD_ACCESS
int align = (VALUE)data % sizeof(uint32_t);
if (align) {
uint32_t d = 0;
int sl, sr, pack;
switch (align) {
#ifdef WORDS_BIGENDIAN
case 1: t |= data[2];
case 2: t |= data[1] << CHAR_BIT;
case 3: t |= data[0] << CHAR_BIT*2;
#else
case 1: t |= data[2] << CHAR_BIT*2;
case 2: t |= data[1] << CHAR_BIT;
case 3: t |= data[0];
#endif
}
#ifdef WORDS_BIGENDIAN
t >>= (CHAR_BIT * align) - CHAR_BIT;
#else
t <<= (CHAR_BIT * align);
#endif
data += sizeof(uint32_t)-align;
len -= sizeof(uint32_t)-align;
sl = CHAR_BIT * (sizeof(uint32_t)-align);
sr = CHAR_BIT * align;
while (len >= sizeof(uint32_t)) {
d = *(uint32_t *)data;
#ifdef WORDS_BIGENDIAN
t = (t << sr) | (d >> sl);
#else
t = (t >> sr) | (d << sl);
#endif
h = murmur_step(h, t);
t = d;
data += sizeof(uint32_t);
len -= sizeof(uint32_t);
}
pack = len < align ? len : align;
d = 0;
switch (pack) {
#ifdef WORDS_BIGENDIAN
case 3: d |= data[2] << CHAR_BIT;
case 2: d |= data[1] << CHAR_BIT*2;
case 1: d |= data[0] << CHAR_BIT*3;
#else
case 3: d |= data[2] << CHAR_BIT*2;
case 2: d |= data[1] << CHAR_BIT;
case 1: d |= data[0];
#endif
}
#ifdef WORDS_BIGENDIAN
t = (t << sr) | (d >> sl);
#else
t = (t >> sr) | (d << sl);
#endif
#if MURMUR == 2
if (len < align) goto skip_tail;
#endif
h = murmur_step(h, t);
data += pack;
len -= pack;
}
else
#endif
{
do {
h = murmur_step(h, *(uint32_t *)data);
data += sizeof(uint32_t);
len -= sizeof(uint32_t);
} while (len >= sizeof(uint32_t));
}
}
t = 0;
switch (len) {
#ifdef WORDS_BIGENDIAN
case 3:
t |= data[2] << CHAR_BIT;
case 2:
t |= data[1] << CHAR_BIT*2;
case 1:
t |= data[0] << CHAR_BIT*3;
#else
case 3:
t |= data[2] << CHAR_BIT*2;
case 2:
t |= data[1] << CHAR_BIT;
case 1:
t |= data[0];
#endif
#if MURMUR == 1
h = murmur_step(h, t);
#elif MURMUR == 2
# if !UNALIGNED_WORD_ACCESS
skip_tail:
# endif
h ^= t;
h *= MurmurMagic;
#endif
}
return murmur_finish(h);
}
unsigned int
rb_hash_uint32(unsigned int h, unsigned int i)
{
return murmur_step(h + i, 16);
}
unsigned int
rb_hash_uint(unsigned int h, unsigned int i)
{
unsigned int v = 0;
h += i;
#ifdef WORDS_BIGENDIAN
#if SIZEOF_INT*CHAR_BIT > 12*8
v = murmur16(v + (h >> 12*8));
#endif
#if SIZEOF_INT*CHAR_BIT > 8*8
v = murmur16(v + (h >> 8*8));
#endif
#if SIZEOF_INT*CHAR_BIT > 4*8
v = murmur16(v + (h >> 4*8));
#endif
#endif
v = murmur16(v + h);
#ifndef WORDS_BIGENDIAN
#if SIZEOF_INT*CHAR_BIT > 4*8
v = murmur16(v + (h >> 4*8));
#endif
#if SIZEOF_INT*CHAR_BIT > 8*8
v = murmur16(v + (h >> 8*8));
#endif
#if SIZEOF_INT*CHAR_BIT > 12*8
v = murmur16(v + (h >> 12*8));
#endif
#endif
return v;
}
unsigned int
rb_hash_end(unsigned int h)
{
h = murmur_step(h, 10);
h = murmur_step(h, 17);
return h;
}
unsigned int
rb_hash_start(unsigned int h)
{
static int hashseed_init = 0;
static unsigned int hashseed;
if (!hashseed_init) {
hashseed = rb_genrand_int32();
hashseed_init = 1;
}
return hashseed + h;
}
int
rb_memhash(const void *ptr, long len)
{
return hash(ptr, len, rb_hash_start(0));
}
int
rb_str_hash(VALUE str)
{
int e = ENCODING_GET(str);
if (e) {
if (rb_enc_str_asciionly_p(str)) e = 0;
}
return rb_memhash((const void *)RSTRING_PTR(str), RSTRING_LEN(str)) ^ e;
}
int
rb_str_hash_cmp(VALUE str1, VALUE str2)
{
int len;
if (!rb_str_comparable(str1, str2)) return 1;
if (RSTRING_LEN(str1) == (len = RSTRING_LEN(str2)) &&
memcmp(RSTRING_PTR(str1), RSTRING_PTR(str2), len) == 0) {
return 0;
}
return 1;
}
/*
* call-seq:
* str.hash => fixnum
*
* Return a hash based on the string's length and content.
*/
static VALUE
rb_str_hash_m(VALUE str)
{
int hval = rb_str_hash(str);
return INT2FIX(hval);
}
#define lesser(a,b) (((a)>(b))?(b):(a))
int
rb_str_comparable(VALUE str1, VALUE str2)
{
int idx1, idx2;
int rc1, rc2;
if (RSTRING_LEN(str1) == 0) return Qtrue;
if (RSTRING_LEN(str2) == 0) return Qtrue;
idx1 = ENCODING_GET(str1);
idx2 = ENCODING_GET(str2);
if (idx1 == idx2) return Qtrue;
rc1 = rb_enc_str_coderange(str1);
rc2 = rb_enc_str_coderange(str2);
if (rc1 == ENC_CODERANGE_7BIT) {
if (rc2 == ENC_CODERANGE_7BIT) return Qtrue;
if (rb_enc_asciicompat(rb_enc_from_index(idx2)))
return Qtrue;
}
if (rc2 == ENC_CODERANGE_7BIT) {
if (rb_enc_asciicompat(rb_enc_from_index(idx1)))
return Qtrue;
}
return Qfalse;
}
int
rb_str_cmp(VALUE str1, VALUE str2)
{
long len;
int retval;
len = lesser(RSTRING_LEN(str1), RSTRING_LEN(str2));
retval = memcmp(RSTRING_PTR(str1), RSTRING_PTR(str2), len);
if (retval == 0) {
if (RSTRING_LEN(str1) == RSTRING_LEN(str2)) {
if (!rb_str_comparable(str1, str2)) {
if (ENCODING_GET(str1) > ENCODING_GET(str2))
return 1;
return -1;
}
return 0;
}
if (RSTRING_LEN(str1) > RSTRING_LEN(str2)) return 1;
return -1;
}
if (retval > 0) return 1;
return -1;
}
/*
* call-seq:
* str == obj => true or false
*
* Equality---If <i>obj</i> is not a <code>String</code>, returns
* <code>false</code>. Otherwise, returns <code>true</code> if <i>str</i>
* <code><=></code> <i>obj</i> returns zero.
*/
VALUE
rb_str_equal(VALUE str1, VALUE str2)
{
int len;
if (str1 == str2) return Qtrue;
if (TYPE(str2) != T_STRING) {
if (!rb_respond_to(str2, rb_intern("to_str"))) {
return Qfalse;
}
return rb_equal(str2, str1);
}
if (!rb_str_comparable(str1, str2)) return Qfalse;
if (RSTRING_LEN(str1) == (len = RSTRING_LEN(str2)) &&
memcmp(RSTRING_PTR(str1), RSTRING_PTR(str2), len) == 0) {
return Qtrue;
}
return Qfalse;
}
/*
* call-seq:
* str.eql?(other) => true or false
*
* Two strings are equal if the have the same length and content.
*/
static VALUE
rb_str_eql(VALUE str1, VALUE str2)
{
if (TYPE(str2) != T_STRING || RSTRING_LEN(str1) != RSTRING_LEN(str2))
return Qfalse;
if (!rb_str_comparable(str1, str2)) return Qfalse;
if (memcmp(RSTRING_PTR(str1), RSTRING_PTR(str2),
lesser(RSTRING_LEN(str1), RSTRING_LEN(str2))) == 0)
return Qtrue;
return Qfalse;
}
/*
* call-seq:
* str <=> other_str => -1, 0, +1
*
* Comparison---Returns -1 if <i>other_str</i> is greater than, 0 if
* <i>other_str</i> is equal to, and +1 if <i>other_str</i> is less than
* <i>str</i>. If the strings are of different lengths, and the strings are
* equal when compared up to the shortest length, then the longer string is
* considered greater than the shorter one. In older versions of Ruby, setting
* <code>$=</code> allowed case-insensitive comparisons; this is now deprecated
* in favor of using <code>String#casecmp</code>.
*
* <code><=></code> is the basis for the methods <code><</code>,
* <code><=</code>, <code>></code>, <code>>=</code>, and <code>between?</code>,
* included from module <code>Comparable</code>. The method
* <code>String#==</code> does not use <code>Comparable#==</code>.
*
* "abcdef" <=> "abcde" #=> 1
* "abcdef" <=> "abcdef" #=> 0
* "abcdef" <=> "abcdefg" #=> -1
* "abcdef" <=> "ABCDEF" #=> 1
*/
static VALUE
rb_str_cmp_m(VALUE str1, VALUE str2)
{
long result;
if (TYPE(str2) != T_STRING) {
if (!rb_respond_to(str2, rb_intern("to_str"))) {
return Qnil;
}
else if (!rb_respond_to(str2, rb_intern("<=>"))) {
return Qnil;
}
else {
VALUE tmp = rb_funcall(str2, rb_intern("<=>"), 1, str1);
if (NIL_P(tmp)) return Qnil;
if (!FIXNUM_P(tmp)) {
return rb_funcall(LONG2FIX(0), '-', 1, tmp);
}
result = -FIX2LONG(tmp);
}
}
else {
result = rb_str_cmp(str1, str2);
}
return LONG2NUM(result);
}
/*
* call-seq:
* str.casecmp(other_str) => -1, 0, +1
*
* Case-insensitive version of <code>String#<=></code>.
*
* "abcdef".casecmp("abcde") #=> 1
* "aBcDeF".casecmp("abcdef") #=> 0
* "abcdef".casecmp("abcdefg") #=> -1
* "abcdef".casecmp("ABCDEF") #=> 0
*/
static VALUE
rb_str_casecmp(VALUE str1, VALUE str2)
{
long len;
rb_encoding *enc;
char *p1, *p1end, *p2, *p2end;
StringValue(str2);
enc = rb_enc_compatible(str1, str2);
if (!enc) {
return Qnil;
}
p1 = RSTRING_PTR(str1); p1end = RSTRING_END(str1);
p2 = RSTRING_PTR(str2); p2end = RSTRING_END(str2);
if (single_byte_optimizable(str1) && single_byte_optimizable(str2)) {
while (p1 < p1end && p2 < p2end) {
if (*p1 != *p2) {
unsigned int c1 = TOUPPER(*p1 & 0xff);
unsigned int c2 = TOUPPER(*p2 & 0xff);
if (c1 != c2)
return INT2FIX(c1 < c2 ? -1 : 1);
}
p1++;
p2++;
}
}
else {
while (p1 < p1end && p2 < p2end) {
int l1, c1 = rb_enc_ascget(p1, p1end, &l1, enc);
int l2, c2 = rb_enc_ascget(p2, p2end, &l2, enc);
if (0 <= c1 && 0 <= c2) {
c1 = TOUPPER(c1);
c2 = TOUPPER(c2);
if (c1 != c2)
return INT2FIX(c1 < c2 ? -1 : 1);
}
else {
int r;
l1 = rb_enc_mbclen(p1, p1end, enc);
l2 = rb_enc_mbclen(p2, p2end, enc);
len = l1 < l2 ? l1 : l2;
r = memcmp(p1, p2, len);
if (r != 0)
return INT2FIX(r < 0 ? -1 : 1);
if (l1 != l2)
return INT2FIX(l1 < l2 ? -1 : 1);
}
p1 += l1;
p2 += l2;
}
}
if (RSTRING_LEN(str1) == RSTRING_LEN(str2)) return INT2FIX(0);
if (RSTRING_LEN(str1) > RSTRING_LEN(str2)) return INT2FIX(1);
return INT2FIX(-1);
}
static long
rb_str_index(VALUE str, VALUE sub, long offset)
{
long pos;
char *s, *sptr, *e;
long len, slen;
rb_encoding *enc;
enc = rb_enc_check(str, sub);
if (is_broken_string(sub)) {
return -1;
}
len = str_strlen(str, enc);
slen = str_strlen(sub, enc);
if (offset < 0) {
offset += len;
if (offset < 0) return -1;
}
if (len - offset < slen) return -1;
s = RSTRING_PTR(str);
e = s + RSTRING_LEN(str);
if (offset) {
offset = str_offset(s, RSTRING_END(str), offset, enc, single_byte_optimizable(str));
s += offset;
}
if (slen == 0) return offset;
/* need proceed one character at a time */
sptr = RSTRING_PTR(sub);
slen = RSTRING_LEN(sub);
len = RSTRING_LEN(str) - offset;
for (;;) {
char *t;
pos = rb_memsearch(sptr, slen, s, len, enc);
if (pos < 0) return pos;
t = rb_enc_right_char_head(s, s+pos, e, enc);
if (t == s + pos) break;
if ((len -= t - s) <= 0) return -1;
offset += t - s;
s = t;
}
return pos + offset;
}
/*
* call-seq:
* str.index(substring [, offset]) => fixnum or nil
* str.index(regexp [, offset]) => fixnum or nil
*
* Returns the index of the first occurrence of the given <i>substring</i> or
* pattern (<i>regexp</i>) in <i>str</i>. Returns <code>nil</code> if not
* found. If the second parameter is present, it specifies the position in the
* string to begin the search.
*
* "hello".index('e') #=> 1
* "hello".index('lo') #=> 3
* "hello".index('a') #=> nil
* "hello".index(?e) #=> 1
* "hello".index(/[aeiou]/, -3) #=> 4
*/
static VALUE
rb_str_index_m(int argc, VALUE *argv, VALUE str)
{
VALUE sub;
VALUE initpos;
long pos;
if (rb_scan_args(argc, argv, "11", &sub, &initpos) == 2) {
pos = NUM2LONG(initpos);
}
else {
pos = 0;
}
if (pos < 0) {
pos += str_strlen(str, STR_ENC_GET(str));
if (pos < 0) {
if (TYPE(sub) == T_REGEXP) {
rb_backref_set(Qnil);
}
return Qnil;
}
}
switch (TYPE(sub)) {
case T_REGEXP:
pos = str_offset(RSTRING_PTR(str), RSTRING_END(str), pos,
rb_enc_check(str, sub), single_byte_optimizable(str));
pos = rb_reg_adjust_startpos(sub, str, pos, 0);
pos = rb_reg_search(sub, str, pos, 0);
pos = rb_str_sublen(str, pos);
break;
default: {
VALUE tmp;
tmp = rb_check_string_type(sub);
if (NIL_P(tmp)) {
rb_raise(rb_eTypeError, "type mismatch: %s given",
rb_obj_classname(sub));
}
sub = tmp;
}
/* fall through */
case T_STRING:
pos = rb_str_index(str, sub, pos);
pos = rb_str_sublen(str, pos);
break;
}
if (pos == -1) return Qnil;
return LONG2NUM(pos);
}
static long
rb_str_rindex(VALUE str, VALUE sub, long pos)
{
long len, slen;
char *s, *sbeg, *e, *t;
rb_encoding *enc;
int singlebyte = single_byte_optimizable(str);
enc = rb_enc_check(str, sub);
if (is_broken_string(sub)) {
return -1;
}
len = str_strlen(str, enc);
slen = str_strlen(sub, enc);
/* substring longer than string */
if (len < slen) return -1;
if (len - pos < slen) {
pos = len - slen;
}
if (len == 0) {
return pos;
}
sbeg = RSTRING_PTR(str);
e = RSTRING_END(str);
t = RSTRING_PTR(sub);
slen = RSTRING_LEN(sub);
for (;;) {
s = str_nth(sbeg, e, pos, enc, singlebyte);
if (!s) return -1;
if (memcmp(s, t, slen) == 0) {
return pos;
}
if (pos == 0) break;
pos--;
}
return -1;
}
/*
* call-seq:
* str.rindex(substring [, fixnum]) => fixnum or nil
* str.rindex(regexp [, fixnum]) => fixnum or nil
*
* Returns the index of the last occurrence of the given <i>substring</i> or
* pattern (<i>regexp</i>) in <i>str</i>. Returns <code>nil</code> if not
* found. If the second parameter is present, it specifies the position in the
* string to end the search---characters beyond this point will not be
* considered.
*
* "hello".rindex('e') #=> 1
* "hello".rindex('l') #=> 3
* "hello".rindex('a') #=> nil
* "hello".rindex(?e) #=> 1
* "hello".rindex(/[aeiou]/, -2) #=> 1
*/
static VALUE
rb_str_rindex_m(int argc, VALUE *argv, VALUE str)
{
VALUE sub;
VALUE vpos;
rb_encoding *enc = STR_ENC_GET(str);
long pos, len = str_strlen(str, enc);
if (rb_scan_args(argc, argv, "11", &sub, &vpos) == 2) {
pos = NUM2LONG(vpos);
if (pos < 0) {
pos += len;
if (pos < 0) {
if (TYPE(sub) == T_REGEXP) {
rb_backref_set(Qnil);
}
return Qnil;
}
}
if (pos > len) pos = len;
}
else {
pos = len;
}
switch (TYPE(sub)) {
case T_REGEXP:
/* enc = rb_get_check(str, sub); */
pos = str_offset(RSTRING_PTR(str), RSTRING_END(str), pos,
STR_ENC_GET(str), single_byte_optimizable(str));
if (!RREGEXP(sub)->ptr || RREGEXP_SRC_LEN(sub)) {
pos = rb_reg_adjust_startpos(sub, str, pos, 1);
pos = rb_reg_search(sub, str, pos, 1);
pos = rb_str_sublen(str, pos);
}
if (pos >= 0) return LONG2NUM(pos);
break;
default: {
VALUE tmp;
tmp = rb_check_string_type(sub);
if (NIL_P(tmp)) {
rb_raise(rb_eTypeError, "type mismatch: %s given",
rb_obj_classname(sub));
}
sub = tmp;
}
/* fall through */
case T_STRING:
pos = rb_str_rindex(str, sub, pos);
if (pos >= 0) return LONG2NUM(pos);
break;
}
return Qnil;
}
/*
* call-seq:
* str =~ obj => fixnum or nil
*
* Match---If <i>obj</i> is a <code>Regexp</code>, use it as a pattern to match
* against <i>str</i>,and returns the position the match starts, or
* <code>nil</code> if there is no match. Otherwise, invokes
* <i>obj.=~</i>, passing <i>str</i> as an argument. The default
* <code>=~</code> in <code>Object</code> returns <code>false</code>.
*
* "cat o' 9 tails" =~ /\d/ #=> 7
* "cat o' 9 tails" =~ 9 #=> nil
*/
static VALUE
rb_str_match(VALUE x, VALUE y)
{
switch (TYPE(y)) {
case T_STRING:
rb_raise(rb_eTypeError, "type mismatch: String given");
case T_REGEXP:
return rb_reg_match(y, x);
default:
return rb_funcall(y, rb_intern("=~"), 1, x);
}
}
static VALUE get_pat(VALUE, int);
/*
* call-seq:
* str.match(pattern) => matchdata or nil
*
* Converts <i>pattern</i> to a <code>Regexp</code> (if it isn't already one),
* then invokes its <code>match</code> method on <i>str</i>. If the second
* parameter is present, it specifies the position in the string to begin the
* search.
*
* 'hello'.match('(.)\1') #=> #<MatchData "ll" 1:"l">
* 'hello'.match('(.)\1')[0] #=> "ll"
* 'hello'.match(/(.)\1/)[0] #=> "ll"
* 'hello'.match('xx') #=> nil
*
* If a block is given, invoke the block with MatchData if match succeed, so
* that you can write
*
* str.match(pat) {|m| ...}
*
* instead of
*
* if m = str.match(pat)
* ...
* end
*
* The return value is a value from block execution in this case.
*/
static VALUE
rb_str_match_m(int argc, VALUE *argv, VALUE str)
{
VALUE re, result;
if (argc < 1)
rb_raise(rb_eArgError, "wrong number of arguments (%d for 1)", argc);
re = argv[0];
argv[0] = str;
result = rb_funcall2(get_pat(re, 0), rb_intern("match"), argc, argv);
if (!NIL_P(result) && rb_block_given_p()) {
return rb_yield(result);
}
return result;
}
enum neighbor_char {
NEIGHBOR_NOT_CHAR,
NEIGHBOR_FOUND,
NEIGHBOR_WRAPPED
};
static enum neighbor_char
enc_succ_char(char *p, int len, rb_encoding *enc)
{
int i, l;
while (1) {
for (i = len-1; 0 <= i && (unsigned char)p[i] == 0xff; i--)
p[i] = '\0';
if (i < 0)
return NEIGHBOR_WRAPPED;
++((unsigned char*)p)[i];
l = rb_enc_precise_mbclen(p, p+len, enc);
if (MBCLEN_CHARFOUND_P(l)) {
l = MBCLEN_CHARFOUND_LEN(l);
if (l == len) {
return NEIGHBOR_FOUND;
}
else {
memset(p+l, 0xff, len-l);
}
}
if (MBCLEN_INVALID_P(l) && i < len-1) {
int len2, l2;
for (len2 = len-1; 0 < len2; len2--) {
l2 = rb_enc_precise_mbclen(p, p+len2, enc);
if (!MBCLEN_INVALID_P(l2))
break;
}
memset(p+len2+1, 0xff, len-(len2+1));
}
}
}
static enum neighbor_char
enc_pred_char(char *p, int len, rb_encoding *enc)
{
int i, l;
while (1) {
for (i = len-1; 0 <= i && (unsigned char)p[i] == 0; i--)
p[i] = '\xff';
if (i < 0)
return NEIGHBOR_WRAPPED;
--((unsigned char*)p)[i];
l = rb_enc_precise_mbclen(p, p+len, enc);
if (MBCLEN_CHARFOUND_P(l)) {
l = MBCLEN_CHARFOUND_LEN(l);
if (l == len) {
return NEIGHBOR_FOUND;
}
else {
memset(p+l, 0, len-l);
}
}
if (MBCLEN_INVALID_P(l) && i < len-1) {
int len2, l2;
for (len2 = len-1; 0 < len2; len2--) {
l2 = rb_enc_precise_mbclen(p, p+len2, enc);
if (!MBCLEN_INVALID_P(l2))
break;
}
memset(p+len2+1, 0, len-(len2+1));
}
}
}
/*
overwrite +p+ by succeeding letter in +enc+ and returns
NEIGHBOR_FOUND or NEIGHBOR_WRAPPED.
When NEIGHBOR_WRAPPED, carried-out letter is stored into carry.
assuming each ranges are successive, and mbclen
never change in each ranges.
NEIGHBOR_NOT_CHAR is returned if invalid character or the range has only one
character.
*/
static enum neighbor_char
enc_succ_alnum_char(char *p, int len, rb_encoding *enc, char *carry)
{
enum neighbor_char ret;
unsigned int c;
int ctype;
int range;
char save[ONIGENC_CODE_TO_MBC_MAXLEN];
c = rb_enc_mbc_to_codepoint(p, p+len, enc);
if (rb_enc_isctype(c, ONIGENC_CTYPE_DIGIT, enc))
ctype = ONIGENC_CTYPE_DIGIT;
else if (rb_enc_isctype(c, ONIGENC_CTYPE_ALPHA, enc))
ctype = ONIGENC_CTYPE_ALPHA;
else
return NEIGHBOR_NOT_CHAR;
MEMCPY(save, p, char, len);
ret = enc_succ_char(p, len, enc);
if (ret == NEIGHBOR_FOUND) {
c = rb_enc_mbc_to_codepoint(p, p+len, enc);
if (rb_enc_isctype(c, ctype, enc))
return NEIGHBOR_FOUND;
}
MEMCPY(p, save, char, len);
range = 1;
while (1) {
MEMCPY(save, p, char, len);
ret = enc_pred_char(p, len, enc);
if (ret == NEIGHBOR_FOUND) {
c = rb_enc_mbc_to_codepoint(p, p+len, enc);
if (!rb_enc_isctype(c, ctype, enc)) {
MEMCPY(p, save, char, len);
break;
}
}
else {
MEMCPY(p, save, char, len);
break;
}
range++;
}
if (range == 1) {
return NEIGHBOR_NOT_CHAR;
}
if (ctype != ONIGENC_CTYPE_DIGIT) {
MEMCPY(carry, p, char, len);
return NEIGHBOR_WRAPPED;
}
MEMCPY(carry, p, char, len);
enc_succ_char(carry, len, enc);
return NEIGHBOR_WRAPPED;
}
/*
* call-seq:
* str.succ => new_str
* str.next => new_str
*
* Returns the successor to <i>str</i>. The successor is calculated by
* incrementing characters starting from the rightmost alphanumeric (or
* the rightmost character if there are no alphanumerics) in the
* string. Incrementing a digit always results in another digit, and
* incrementing a letter results in another letter of the same case.
* Incrementing nonalphanumerics uses the underlying character set's
* collating sequence.
*
* If the increment generates a ``carry,'' the character to the left of
* it is incremented. This process repeats until there is no carry,
* adding an additional character if necessary.
*
* "abcd".succ #=> "abce"
* "THX1138".succ #=> "THX1139"
* "<<koala>>".succ #=> "<<koalb>>"
* "1999zzz".succ #=> "2000aaa"
* "ZZZ9999".succ #=> "AAAA0000"
* "***".succ #=> "**+"
*/
VALUE
rb_str_succ(VALUE orig)
{
rb_encoding *enc;
VALUE str;
char *sbeg, *s, *e, *last_alnum = 0;
int c = -1;
long l;
char carry[ONIGENC_CODE_TO_MBC_MAXLEN] = "\1";
int carry_pos = 0, carry_len = 1;
enum neighbor_char neighbor = NEIGHBOR_FOUND;
str = rb_str_new5(orig, RSTRING_PTR(orig), RSTRING_LEN(orig));
rb_enc_cr_str_copy_for_substr(str, orig);
OBJ_INFECT(str, orig);
if (RSTRING_LEN(str) == 0) return str;
enc = STR_ENC_GET(orig);
sbeg = RSTRING_PTR(str);
s = e = sbeg + RSTRING_LEN(str);
while ((s = rb_enc_prev_char(sbeg, s, e, enc)) != 0) {
if (neighbor == NEIGHBOR_NOT_CHAR && last_alnum) {
if (ISALPHA(*last_alnum) ? ISDIGIT(*s) :
ISDIGIT(*last_alnum) ? ISALPHA(*s) : 0) {
s = last_alnum;
break;
}
}
if ((l = rb_enc_precise_mbclen(s, e, enc)) <= 0) continue;
neighbor = enc_succ_alnum_char(s, l, enc, carry);
switch (neighbor) {
case NEIGHBOR_NOT_CHAR:
continue;
case NEIGHBOR_FOUND:
return str;
case NEIGHBOR_WRAPPED:
last_alnum = s;
break;
}
c = 1;
carry_pos = s - sbeg;
carry_len = l;
}
if (c == -1) { /* str contains no alnum */
s = e;
while ((s = rb_enc_prev_char(sbeg, s, e, enc)) != 0) {
enum neighbor_char neighbor;
if ((l = rb_enc_precise_mbclen(s, e, enc)) <= 0) continue;
neighbor = enc_succ_char(s, l, enc);
if (neighbor == NEIGHBOR_FOUND)
return str;
if (rb_enc_precise_mbclen(s, s+l, enc) != l) {
/* wrapped to \0...\0. search next valid char. */
enc_succ_char(s, l, enc);
}
if (!rb_enc_asciicompat(enc)) {
MEMCPY(carry, s, char, l);
carry_len = l;
}
carry_pos = s - sbeg;
}
}
RESIZE_CAPA(str, RSTRING_LEN(str) + carry_len);
s = RSTRING_PTR(str) + carry_pos;
memmove(s + carry_len, s, RSTRING_LEN(str) - carry_pos);
memmove(s, carry, carry_len);
STR_SET_LEN(str, RSTRING_LEN(str) + carry_len);
RSTRING_PTR(str)[RSTRING_LEN(str)] = '\0';
rb_enc_str_coderange(str);
return str;
}
/*
* call-seq:
* str.succ! => str
* str.next! => str
*
* Equivalent to <code>String#succ</code>, but modifies the receiver in
* place.
*/
static VALUE
rb_str_succ_bang(VALUE str)
{
rb_str_shared_replace(str, rb_str_succ(str));
return str;
}
/*
* call-seq:
* str.upto(other_str, exclusive=false) {|s| block } => str
*
* Iterates through successive values, starting at <i>str</i> and
* ending at <i>other_str</i> inclusive, passing each value in turn to
* the block. The <code>String#succ</code> method is used to generate
* each value. If optional second argument exclusive is omitted or is <code>false</code>,
* the last value will be included; otherwise it will be excluded.
*
* "a8".upto("b6") {|s| print s, ' ' }
* for s in "a8".."b6"
* print s, ' '
* end
*
* <em>produces:</em>
*
* a8 a9 b0 b1 b2 b3 b4 b5 b6
* a8 a9 b0 b1 b2 b3 b4 b5 b6
*/
static VALUE
rb_str_upto(int argc, VALUE *argv, VALUE beg)
{
VALUE end, exclusive;
VALUE current, after_end;
ID succ;
int n, excl;
rb_encoding *enc;
rb_scan_args(argc, argv, "11", &end, &exclusive);
RETURN_ENUMERATOR(beg, argc, argv);
excl = RTEST(exclusive);
CONST_ID(succ, "succ");
StringValue(end);
enc = rb_enc_check(beg, end);
if (RSTRING_LEN(beg) == 1 && RSTRING_LEN(end) == 1 &&
is_ascii_string(beg) && is_ascii_string(end)) {
char c = RSTRING_PTR(beg)[0];
char e = RSTRING_PTR(end)[0];
if (c > e || (excl && c == e)) return beg;
for (;;) {
rb_yield(rb_enc_str_new(&c, 1, enc));
if (!excl && c == e) break;
c++;
if (excl && c == e) break;
}
return beg;
}
n = rb_str_cmp(beg, end);
if (n > 0 || (excl && n == 0)) return beg;
after_end = rb_funcall(end, succ, 0, 0);
current = beg;
while (!rb_str_equal(current, after_end)) {
rb_yield(current);
if (!excl && rb_str_equal(current, end)) break;
current = rb_funcall(current, succ, 0, 0);
StringValue(current);
if (excl && rb_str_equal(current, end)) break;
if (RSTRING_LEN(current) > RSTRING_LEN(end) || RSTRING_LEN(current) == 0)
break;
}
return beg;
}
static VALUE
rb_str_subpat(VALUE str, VALUE re, int nth)
{
if (rb_reg_search(re, str, 0, 0) >= 0) {
return rb_reg_nth_match(nth, rb_backref_get());
}
return Qnil;
}
static VALUE
rb_str_aref(VALUE str, VALUE indx)
{
long idx;
switch (TYPE(indx)) {
case T_FIXNUM:
idx = FIX2LONG(indx);
num_index:
str = rb_str_substr(str, idx, 1);
if (!NIL_P(str) && RSTRING_LEN(str) == 0) return Qnil;
return str;
case T_REGEXP:
return rb_str_subpat(str, indx, 0);
case T_STRING:
if (rb_str_index(str, indx, 0) != -1)
return rb_str_dup(indx);
return Qnil;
default:
/* check if indx is Range */
{
long beg, len;
VALUE tmp;
len = str_strlen(str, STR_ENC_GET(str));
switch (rb_range_beg_len(indx, &beg, &len, len, 0)) {
case Qfalse:
break;
case Qnil:
return Qnil;
default:
tmp = rb_str_substr(str, beg, len);
return tmp;
}
}
idx = NUM2LONG(indx);
goto num_index;
}
return Qnil; /* not reached */
}
/*
* call-seq:
* str[fixnum] => new_str or nil
* str[fixnum, fixnum] => new_str or nil
* str[range] => new_str or nil
* str[regexp] => new_str or nil
* str[regexp, fixnum] => new_str or nil
* str[other_str] => new_str or nil
* str.slice(fixnum) => new_str or nil
* str.slice(fixnum, fixnum) => new_str or nil
* str.slice(range) => new_str or nil
* str.slice(regexp) => new_str or nil
* str.slice(regexp, fixnum) => new_str or nil
* str.slice(other_str) => new_str or nil
*
* Element Reference---If passed a single <code>Fixnum</code>, returns a
* substring of one character at that position. If passed two <code>Fixnum</code>
* objects, returns a substring starting at the offset given by the first, and
* a length given by the second. If given a range, a substring containing
* characters at offsets given by the range is returned. In all three cases, if
* an offset is negative, it is counted from the end of <i>str</i>. Returns
* <code>nil</code> if the initial offset falls outside the string, the length
* is negative, or the beginning of the range is greater than the end.
*
* If a <code>Regexp</code> is supplied, the matching portion of <i>str</i> is
* returned. If a numeric parameter follows the regular expression, that
* component of the <code>MatchData</code> is returned instead. If a
* <code>String</code> is given, that string is returned if it occurs in
* <i>str</i>. In both cases, <code>nil</code> is returned if there is no
* match.
*
* a = "hello there"
* a[1] #=> "e"
* a[1,3] #=> "ell"
* a[1..3] #=> "ell"
* a[-3,2] #=> "er"
* a[-4..-2] #=> "her"
* a[12..-1] #=> nil
* a[-2..-4] #=> ""
* a[/[aeiou](.)\1/] #=> "ell"
* a[/[aeiou](.)\1/, 0] #=> "ell"
* a[/[aeiou](.)\1/, 1] #=> "l"
* a[/[aeiou](.)\1/, 2] #=> nil
* a["lo"] #=> "lo"
* a["bye"] #=> nil
*/
static VALUE
rb_str_aref_m(int argc, VALUE *argv, VALUE str)
{
if (argc == 2) {
if (TYPE(argv[0]) == T_REGEXP) {
return rb_str_subpat(str, argv[0], NUM2INT(argv[1]));
}
return rb_str_substr(str, NUM2LONG(argv[0]), NUM2LONG(argv[1]));
}
if (argc != 1) {
rb_raise(rb_eArgError, "wrong number of arguments (%d for 1)", argc);
}
return rb_str_aref(str, argv[0]);
}
VALUE
rb_str_drop_bytes(VALUE str, long len)
{
char *ptr = RSTRING_PTR(str);
long olen = RSTRING_LEN(str), nlen;
str_modifiable(str);
if (len > olen) len = olen;
nlen = olen - len;
if (nlen <= RSTRING_EMBED_LEN_MAX) {
char *oldptr = ptr;
int fl = (RBASIC(str)->flags & (STR_NOEMBED|ELTS_SHARED));
STR_SET_EMBED(str);
STR_SET_EMBED_LEN(str, nlen);
ptr = RSTRING(str)->as.ary;
memmove(ptr, oldptr + len, nlen);
if (fl == STR_NOEMBED) xfree(oldptr);
}
else {
if (!STR_SHARED_P(str)) rb_str_new4(str);
ptr = RSTRING(str)->as.heap.ptr += len;
RSTRING(str)->as.heap.len = nlen;
}
ptr[nlen] = 0;
ENC_CODERANGE_CLEAR(str);
return str;
}
static void
rb_str_splice_0(VALUE str, long beg, long len, VALUE val)
{
if (beg == 0 && RSTRING_LEN(val) == 0) {
rb_str_drop_bytes(str, len);
OBJ_INFECT(str, val);
return;
}
rb_str_modify(str);
if (len < RSTRING_LEN(val)) {
/* expand string */
RESIZE_CAPA(str, RSTRING_LEN(str) + RSTRING_LEN(val) - len + 1);
}
if (RSTRING_LEN(val) != len) {
memmove(RSTRING_PTR(str) + beg + RSTRING_LEN(val),
RSTRING_PTR(str) + beg + len,
RSTRING_LEN(str) - (beg + len));
}
if (RSTRING_LEN(val) < beg && len < 0) {
MEMZERO(RSTRING_PTR(str) + RSTRING_LEN(str), char, -len);
}
if (RSTRING_LEN(val) > 0) {
memmove(RSTRING_PTR(str)+beg, RSTRING_PTR(val), RSTRING_LEN(val));
}
STR_SET_LEN(str, RSTRING_LEN(str) + RSTRING_LEN(val) - len);
if (RSTRING_PTR(str)) {
RSTRING_PTR(str)[RSTRING_LEN(str)] = '\0';
}
OBJ_INFECT(str, val);
}
static void
rb_str_splice(VALUE str, long beg, long len, VALUE val)
{
long slen;
char *p, *e;
rb_encoding *enc;
int singlebyte = single_byte_optimizable(str);
int cr;
if (len < 0) rb_raise(rb_eIndexError, "negative length %ld", len);
StringValue(val);
enc = rb_enc_check(str, val);
slen = str_strlen(str, enc);
if (slen < beg) {
out_of_range:
rb_raise(rb_eIndexError, "index %ld out of string", beg);
}
if (beg < 0) {
if (-beg > slen) {
goto out_of_range;
}
beg += slen;
}
if (slen < len || slen < beg + len) {
len = slen - beg;
}
str_modify_keep_cr(str);
p = str_nth(RSTRING_PTR(str), RSTRING_END(str), beg, enc, singlebyte);
if (!p) p = RSTRING_END(str);
e = str_nth(p, RSTRING_END(str), len, enc, singlebyte);
if (!e) e = RSTRING_END(str);
/* error check */
beg = p - RSTRING_PTR(str); /* physical position */
len = e - p; /* physical length */
rb_str_splice_0(str, beg, len, val);
rb_enc_associate(str, enc);
cr = ENC_CODERANGE_AND(ENC_CODERANGE(str), ENC_CODERANGE(val));
if (cr != ENC_CODERANGE_BROKEN)
ENC_CODERANGE_SET(str, cr);
}
void
rb_str_update(VALUE str, long beg, long len, VALUE val)
{
rb_str_splice(str, beg, len, val);
}
static void
rb_str_subpat_set(VALUE str, VALUE re, int nth, VALUE val)
{
VALUE match;
long start, end, len;
rb_encoding *enc;
struct re_registers *regs;
if (rb_reg_search(re, str, 0, 0) < 0) {
rb_raise(rb_eIndexError, "regexp not matched");
}
match = rb_backref_get();
regs = RMATCH_REGS(match);
if (nth >= regs->num_regs) {
out_of_range:
rb_raise(rb_eIndexError, "index %d out of regexp", nth);
}
if (nth < 0) {
if (-nth >= regs->num_regs) {
goto out_of_range;
}
nth += regs->num_regs;
}
start = BEG(nth);
if (start == -1) {
rb_raise(rb_eIndexError, "regexp group %d not matched", nth);
}
end = END(nth);
len = end - start;
StringValue(val);
enc = rb_enc_check(str, val);
rb_str_splice_0(str, start, len, val);
rb_enc_associate(str, enc);
}
static VALUE
rb_str_aset(VALUE str, VALUE indx, VALUE val)
{
long idx, beg;
switch (TYPE(indx)) {
case T_FIXNUM:
idx = FIX2LONG(indx);
num_index:
rb_str_splice(str, idx, 1, val);
return val;
case T_REGEXP:
rb_str_subpat_set(str, indx, 0, val);
return val;
case T_STRING:
beg = rb_str_index(str, indx, 0);
if (beg < 0) {
rb_raise(rb_eIndexError, "string not matched");
}
beg = rb_str_sublen(str, beg);
rb_str_splice(str, beg, str_strlen(indx, 0), val);
return val;
default:
/* check if indx is Range */
{
long beg, len;
if (rb_range_beg_len(indx, &beg, &len, str_strlen(str, 0), 2)) {
rb_str_splice(str, beg, len, val);
return val;
}
}
idx = NUM2LONG(indx);
goto num_index;
}
}
/*
* call-seq:
* str[fixnum] = new_str
* str[fixnum, fixnum] = new_str
* str[range] = aString
* str[regexp] = new_str
* str[regexp, fixnum] = new_str
* str[other_str] = new_str
*
* Element Assignment---Replaces some or all of the content of <i>str</i>. The
* portion of the string affected is determined using the same criteria as
* <code>String#[]</code>. If the replacement string is not the same length as
* the text it is replacing, the string will be adjusted accordingly. If the
* regular expression or string is used as the index doesn't match a position
* in the string, <code>IndexError</code> is raised. If the regular expression
* form is used, the optional second <code>Fixnum</code> allows you to specify
* which portion of the match to replace (effectively using the
* <code>MatchData</code> indexing rules. The forms that take a
* <code>Fixnum</code> will raise an <code>IndexError</code> if the value is
* out of range; the <code>Range</code> form will raise a
* <code>RangeError</code>, and the <code>Regexp</code> and <code>String</code>
* forms will silently ignore the assignment.
*/
static VALUE
rb_str_aset_m(int argc, VALUE *argv, VALUE str)
{
if (argc == 3) {
if (TYPE(argv[0]) == T_REGEXP) {
rb_str_subpat_set(str, argv[0], NUM2INT(argv[1]), argv[2]);
}
else {
rb_str_splice(str, NUM2LONG(argv[0]), NUM2LONG(argv[1]), argv[2]);
}
return argv[2];
}
if (argc != 2) {
rb_raise(rb_eArgError, "wrong number of arguments (%d for 2)", argc);
}
return rb_str_aset(str, argv[0], argv[1]);
}
/*
* call-seq:
* str.insert(index, other_str) => str
*
* Inserts <i>other_str</i> before the character at the given
* <i>index</i>, modifying <i>str</i>. Negative indices count from the
* end of the string, and insert <em>after</em> the given character.
* The intent is insert <i>aString</i> so that it starts at the given
* <i>index</i>.
*
* "abcd".insert(0, 'X') #=> "Xabcd"
* "abcd".insert(3, 'X') #=> "abcXd"
* "abcd".insert(4, 'X') #=> "abcdX"
* "abcd".insert(-3, 'X') #=> "abXcd"
* "abcd".insert(-1, 'X') #=> "abcdX"
*/
static VALUE
rb_str_insert(VALUE str, VALUE idx, VALUE str2)
{
long pos = NUM2LONG(idx);
if (pos == -1) {
return rb_str_append(str, str2);
}
else if (pos < 0) {
pos++;
}
rb_str_splice(str, pos, 0, str2);
return str;
}
/*
* call-seq:
* str.slice!(fixnum) => fixnum or nil
* str.slice!(fixnum, fixnum) => new_str or nil
* str.slice!(range) => new_str or nil
* str.slice!(regexp) => new_str or nil
* str.slice!(other_str) => new_str or nil
*
* Deletes the specified portion from <i>str</i>, and returns the portion
* deleted.
*
* string = "this is a string"
* string.slice!(2) #=> "i"
* string.slice!(3..6) #=> " is "
* string.slice!(/s.*t/) #=> "sa st"
* string.slice!("r") #=> "r"
* string #=> "thing"
*/
static VALUE
rb_str_slice_bang(int argc, VALUE *argv, VALUE str)
{
VALUE result;
VALUE buf[3];
int i;
if (argc < 1 || 2 < argc) {
rb_raise(rb_eArgError, "wrong number of arguments (%d for 1)", argc);
}
for (i=0; i<argc; i++) {
buf[i] = argv[i];
}
str_modify_keep_cr(str);
buf[i] = rb_str_new(0,0);
result = rb_str_aref_m(argc, buf, str);
if (!NIL_P(result)) {
rb_str_aset_m(argc+1, buf, str);
}
return result;
}
static VALUE
get_pat(VALUE pat, int quote)
{
VALUE val;
switch (TYPE(pat)) {
case T_REGEXP:
return pat;
case T_STRING:
break;
default:
val = rb_check_string_type(pat);
if (NIL_P(val)) {
Check_Type(pat, T_REGEXP);
}
pat = val;
}
if (quote) {
pat = rb_reg_quote(pat);
}
return rb_reg_regcomp(pat);
}
/*
* call-seq:
* str.sub!(pattern, replacement) => str or nil
* str.sub!(pattern) {|match| block } => str or nil
*
* Performs the substitutions of <code>String#sub</code> in place,
* returning <i>str</i>, or <code>nil</code> if no substitutions were
* performed.
*/
static VALUE
rb_str_sub_bang(int argc, VALUE *argv, VALUE str)
{
VALUE pat, repl, hash = Qnil;
int iter = 0;
int tainted = 0;
int untrusted = 0;
long plen;
if (argc == 1 && rb_block_given_p()) {
iter = 1;
}
else if (argc == 2) {
repl = argv[1];
hash = rb_check_convert_type(argv[1], T_HASH, "Hash", "to_hash");
if (NIL_P(hash)) {
StringValue(repl);
}
if (OBJ_TAINTED(repl)) tainted = 1;
if (OBJ_UNTRUSTED(repl)) untrusted = 1;
}
else {
rb_raise(rb_eArgError, "wrong number of arguments (%d for 2)", argc);
}
pat = get_pat(argv[0], 1);
if (rb_reg_search(pat, str, 0, 0) >= 0) {
rb_encoding *enc;
int cr = ENC_CODERANGE(str);
VALUE match = rb_backref_get();
struct re_registers *regs = RMATCH_REGS(match);
long beg0 = BEG(0);
long end0 = END(0);
if (iter || !NIL_P(hash)) {
char *p = RSTRING_PTR(str); long len = RSTRING_LEN(str);
if (iter) {
repl = rb_obj_as_string(rb_yield(rb_reg_nth_match(0, match)));
}
else {
repl = rb_hash_aref(hash, rb_str_subseq(str, beg0, end0 - beg0));
repl = rb_obj_as_string(repl);
}
str_mod_check(str, p, len);
str_frozen_check(str);
}
else {
repl = rb_reg_regsub(repl, str, regs, pat);
}
enc = rb_enc_compatible(str, repl);
if (!enc) {
rb_encoding *str_enc = STR_ENC_GET(str);
if (coderange_scan(RSTRING_PTR(str), beg0, str_enc) != ENC_CODERANGE_7BIT ||
coderange_scan(RSTRING_PTR(str)+end0,
RSTRING_LEN(str)-end0, str_enc) != ENC_CODERANGE_7BIT) {
rb_raise(rb_eEncCompatError, "incompatible character encodings: %s and %s",
rb_enc_name(str_enc),
rb_enc_name(STR_ENC_GET(repl)));
}
enc = STR_ENC_GET(repl);
}
rb_str_modify(str);
rb_enc_associate(str, enc);
if (OBJ_TAINTED(repl)) tainted = 1;
if (OBJ_UNTRUSTED(repl)) untrusted = 1;
if (ENC_CODERANGE_UNKNOWN < cr && cr < ENC_CODERANGE_BROKEN) {
int cr2 = ENC_CODERANGE(repl);
if (cr2 == ENC_CODERANGE_BROKEN ||
(cr == ENC_CODERANGE_VALID && cr2 == ENC_CODERANGE_7BIT))
cr = ENC_CODERANGE_UNKNOWN;
else
cr = cr2;
}
plen = end0 - beg0;
if (RSTRING_LEN(repl) > plen) {
RESIZE_CAPA(str, RSTRING_LEN(str) + RSTRING_LEN(repl) - plen);
}
if (RSTRING_LEN(repl) != plen) {
memmove(RSTRING_PTR(str) + beg0 + RSTRING_LEN(repl),
RSTRING_PTR(str) + beg0 + plen,
RSTRING_LEN(str) - beg0 - plen);
}
memcpy(RSTRING_PTR(str) + beg0,
RSTRING_PTR(repl), RSTRING_LEN(repl));
STR_SET_LEN(str, RSTRING_LEN(str) + RSTRING_LEN(repl) - plen);
RSTRING_PTR(str)[RSTRING_LEN(str)] = '\0';
ENC_CODERANGE_SET(str, cr);
if (tainted) OBJ_TAINT(str);
if (untrusted) OBJ_UNTRUST(str);
return str;
}
return Qnil;
}
/*
* call-seq:
* str.sub(pattern, replacement) => new_str
* str.sub(pattern) {|match| block } => new_str
*
* Returns a copy of <i>str</i> with the <em>first</em> occurrence of
* <i>pattern</i> replaced with either <i>replacement</i> or the value of the
* block. The <i>pattern</i> will typically be a <code>Regexp</code>; if it is
* a <code>String</code> then no regular expression metacharacters will be
* interpreted (that is <code>/\d/</code> will match a digit, but
* <code>'\d'</code> will match a backslash followed by a 'd').
*
* If the method call specifies <i>replacement</i>, special variables such as
* <code>$&</code> will not be useful, as substitution into the string occurs
* before the pattern match starts. However, the sequences <code>\1</code>,
* <code>\2</code>, <code>\k<group_name></code>, etc., may be used.
*
* In the block form, the current match string is passed in as a parameter, and
* variables such as <code>$1</code>, <code>$2</code>, <code>$`</code>,
* <code>$&</code>, and <code>$'</code> will be set appropriately. The value
* returned by the block will be substituted for the match on each call.
*
* The result inherits any tainting in the original string or any supplied
* replacement string.
*
* "hello".sub(/[aeiou]/, '*') #=> "h*llo"
* "hello".sub(/([aeiou])/, '<\1>') #=> "h<e>llo"
* "hello".sub(/./) {|s| s[0].ord.to_s + ' ' } #=> "104 ello"
* "hello".sub(/(?<foo>[aeiou])/, '*\k<foo>*') #=> "h*e*llo"
*/
static VALUE
rb_str_sub(int argc, VALUE *argv, VALUE str)
{
str = rb_str_dup(str);
rb_str_sub_bang(argc, argv, str);
return str;
}
static VALUE
str_gsub(int argc, VALUE *argv, VALUE str, int bang)
{
VALUE pat, val, repl, match, dest, hash = Qnil;
struct re_registers *regs;
long beg, n;
long beg0, end0;
long offset, blen, slen, len, last;
int iter = 0;
char *sp, *cp;
int tainted = 0;
rb_encoding *str_enc;
switch (argc) {
case 1:
RETURN_ENUMERATOR(str, argc, argv);
iter = 1;
break;
case 2:
repl = argv[1];
hash = rb_check_convert_type(argv[1], T_HASH, "Hash", "to_hash");
if (NIL_P(hash)) {
StringValue(repl);
}
if (OBJ_TAINTED(repl)) tainted = 1;
break;
default:
rb_raise(rb_eArgError, "wrong number of arguments (%d for 2)", argc);
}
pat = get_pat(argv[0], 1);
beg = rb_reg_search(pat, str, 0, 0);
if (beg < 0) {
if (bang) return Qnil; /* no match, no substitution */
return rb_str_dup(str);
}
offset = 0;
n = 0;
blen = RSTRING_LEN(str) + 30; /* len + margin */
dest = rb_str_buf_new(blen);
sp = RSTRING_PTR(str);
slen = RSTRING_LEN(str);
cp = sp;
str_enc = STR_ENC_GET(str);
do {
n++;
match = rb_backref_get();
regs = RMATCH_REGS(match);
beg0 = BEG(0);
end0 = END(0);
if (iter || !NIL_P(hash)) {
if (iter) {
val = rb_obj_as_string(rb_yield(rb_reg_nth_match(0, match)));
}
else {
val = rb_hash_aref(hash, rb_str_subseq(str, BEG(0), END(0) - BEG(0)));
val = rb_obj_as_string(val);
}
str_mod_check(str, sp, slen);
if (bang) str_frozen_check(str);
if (val == dest) { /* paranoid check [ruby-dev:24827] */
rb_raise(rb_eRuntimeError, "block should not cheat");
}
}
else {
val = rb_reg_regsub(repl, str, regs, pat);
}
if (OBJ_TAINTED(val)) tainted = 1;
len = beg - offset; /* copy pre-match substr */
if (len) {
rb_enc_str_buf_cat(dest, cp, len, str_enc);
}
rb_str_buf_append(dest, val);
last = offset;
offset = end0;
if (beg0 == end0) {
/*
* Always consume at least one character of the input string
* in order to prevent infinite loops.
*/
if (RSTRING_LEN(str) <= end0) break;
len = rb_enc_mbclen(RSTRING_PTR(str)+end0, RSTRING_END(str), str_enc);
rb_enc_str_buf_cat(dest, RSTRING_PTR(str)+end0, len, str_enc);
offset = end0 + len;
}
cp = RSTRING_PTR(str) + offset;
if (offset > RSTRING_LEN(str)) break;
beg = rb_reg_search(pat, str, offset, 0);
} while (beg >= 0);
if (RSTRING_LEN(str) > offset) {
rb_enc_str_buf_cat(dest, cp, RSTRING_LEN(str) - offset, str_enc);
}
rb_reg_search(pat, str, last, 0);
if (bang) {
rb_str_shared_replace(str, dest);
}
else {
RBASIC(dest)->klass = rb_obj_class(str);
OBJ_INFECT(dest, str);
str = dest;
}
if (tainted) OBJ_TAINT(str);
return str;
}
/*
* call-seq:
* str.gsub!(pattern, replacement) => str or nil
* str.gsub!(pattern) {|match| block } => str or nil
*
* Performs the substitutions of <code>String#gsub</code> in place, returning
* <i>str</i>, or <code>nil</code> if no substitutions were performed.
*/
static VALUE
rb_str_gsub_bang(int argc, VALUE *argv, VALUE str)
{
return str_gsub(argc, argv, str, 1);
}
/*
* call-seq:
* str.gsub(pattern, replacement) => new_str
* str.gsub(pattern) {|match| block } => new_str
*
* Returns a copy of <i>str</i> with <em>all</em> occurrences of <i>pattern</i>
* replaced with either <i>replacement</i> or the value of the block. The
* <i>pattern</i> will typically be a <code>Regexp</code>; if it is a
* <code>String</code> then no regular expression metacharacters will be
* interpreted (that is <code>/\d/</code> will match a digit, but
* <code>'\d'</code> will match a backslash followed by a 'd').
*
* If a string is used as the replacement, special variables from the match
* (such as <code>$&</code> and <code>$1</code>) cannot be substituted into it,
* as substitution into the string occurs before the pattern match
* starts. However, the sequences <code>\1</code>, <code>\2</code>,
* <code>\k<group_name></code>, and so on may be used to interpolate
* successive groups in the match.
*
* In the block form, the current match string is passed in as a parameter, and
* variables such as <code>$1</code>, <code>$2</code>, <code>$`</code>,
* <code>$&</code>, and <code>$'</code> will be set appropriately. The value
* returned by the block will be substituted for the match on each call.
*
* The result inherits any tainting in the original string or any supplied
* replacement string.
*
* "hello".gsub(/[aeiou]/, '*') #=> "h*ll*"
* "hello".gsub(/([aeiou])/, '<\1>') #=> "h<e>ll<o>"
* "hello".gsub(/./) {|s| s[0].ord.to_s + ' '} #=> "104 101 108 108 111 "
* "hello".gsub(/(?<foo>[aeiou])/, '{\k<foo>}') #=> "h{e}ll{o}"
*/
static VALUE
rb_str_gsub(int argc, VALUE *argv, VALUE str)
{
return str_gsub(argc, argv, str, 0);
}
/*
* call-seq:
* str.replace(other_str) => str
*
* Replaces the contents and taintedness of <i>str</i> with the corresponding
* values in <i>other_str</i>.
*
* s = "hello" #=> "hello"
* s.replace "world" #=> "world"
*/
VALUE
rb_str_replace(VALUE str, VALUE str2)
{
long len;
if (str == str2) return str;
StringValue(str2);
len = RSTRING_LEN(str2);
if (STR_ASSOC_P(str2)) {
str2 = rb_str_new4(str2);
}
str_discard(str);
if (STR_SHARED_P(str2)) {
STR_SET_NOEMBED(str);
RSTRING(str)->as.heap.len = len;
RSTRING(str)->as.heap.ptr = RSTRING_PTR(str2);
FL_SET(str, ELTS_SHARED);
FL_UNSET(str, STR_ASSOC);
RSTRING(str)->as.heap.aux.shared = RSTRING(str2)->as.heap.aux.shared;
}
else {
str_replace_shared(str, rb_str_new4(str2));
}
OBJ_INFECT(str, str2);
rb_enc_cr_str_exact_copy(str, str2);
return str;
}
/*
* call-seq:
* string.clear -> string
*
* Makes string empty.
*
* a = "abcde"
* a.clear #=> ""
*/
static VALUE
rb_str_clear(VALUE str)
{
str_discard(str);
STR_SET_EMBED(str);
STR_SET_EMBED_LEN(str, 0);
RSTRING_PTR(str)[0] = 0;
if (rb_enc_asciicompat(STR_ENC_GET(str)))
ENC_CODERANGE_SET(str, ENC_CODERANGE_7BIT);
else
ENC_CODERANGE_SET(str, ENC_CODERANGE_VALID);
return str;
}
/*
* call-seq:
* string.chr -> string
*
* Returns a one-character string at the beginning of the string.
*
* a = "abcde"
* a.chr #=> "a"
*/
static VALUE
rb_str_chr(VALUE str)
{
return rb_str_substr(str, 0, 1);
}
/*
* call-seq:
* str.getbyte(index) => 0 .. 255
*
* returns the <i>index</i>th byte as an integer.
*/
static VALUE
rb_str_getbyte(VALUE str, VALUE index)
{
long pos = NUM2LONG(index);
if (pos < 0)
pos += RSTRING_LEN(str);
if (pos < 0 || RSTRING_LEN(str) <= pos)
return Qnil;
return INT2FIX((unsigned char)RSTRING_PTR(str)[pos]);
}
/*
* call-seq:
* str.setbyte(index, int) => int
*
* modifies the <i>index</i>th byte as <i>int</i>.
*/
static VALUE
rb_str_setbyte(VALUE str, VALUE index, VALUE value)
{
long pos = NUM2LONG(index);
int byte = NUM2INT(value);
rb_str_modify(str);
if (pos < -RSTRING_LEN(str) || RSTRING_LEN(str) <= pos)
rb_raise(rb_eIndexError, "index %ld out of string", pos);
if (pos < 0)
pos += RSTRING_LEN(str);
RSTRING_PTR(str)[pos] = byte;
return value;
}
/*
* call-seq:
* str.reverse => new_str
*
* Returns a new string with the characters from <i>str</i> in reverse order.
*
* "stressed".reverse #=> "desserts"
*/
static VALUE
rb_str_reverse(VALUE str)
{
rb_encoding *enc;
VALUE rev;
char *s, *e, *p;
int single = 1;
if (RSTRING_LEN(str) <= 1) return rb_str_dup(str);
enc = STR_ENC_GET(str);
rev = rb_str_new5(str, 0, RSTRING_LEN(str));
s = RSTRING_PTR(str); e = RSTRING_END(str);
p = RSTRING_END(rev);
if (RSTRING_LEN(str) > 1) {
if (single_byte_optimizable(str)) {
while (s < e) {
*--p = *s++;
}
}
else {
while (s < e) {
int clen = rb_enc_mbclen(s, e, enc);
if (clen > 1 || (*s & 0x80)) single = 0;
p -= clen;
memcpy(p, s, clen);
s += clen;
}
}
}
STR_SET_LEN(rev, RSTRING_LEN(str));
OBJ_INFECT(rev, str);
if (ENC_CODERANGE(str) == ENC_CODERANGE_UNKNOWN) {
if (single) {
ENC_CODERANGE_SET(str, ENC_CODERANGE_7BIT);
}
else {
ENC_CODERANGE_SET(str, ENC_CODERANGE_VALID);
}
}
rb_enc_cr_str_copy_for_substr(rev, str);
return rev;
}
/*
* call-seq:
* str.reverse! => str
*
* Reverses <i>str</i> in place.
*/
static VALUE
rb_str_reverse_bang(VALUE str)
{
if (RSTRING_LEN(str) > 1) {
if (single_byte_optimizable(str)) {
char *s, *e, c;
str_modify_keep_cr(str);
s = RSTRING_PTR(str);
e = RSTRING_END(str) - 1;
while (s < e) {
c = *s;
*s++ = *e;
*e-- = c;
}
}
else {
rb_str_shared_replace(str, rb_str_reverse(str));
}
}
return str;
}
/*
* call-seq:
* str.include? other_str => true or false
*
* Returns <code>true</code> if <i>str</i> contains the given string or
* character.
*
* "hello".include? "lo" #=> true
* "hello".include? "ol" #=> false
* "hello".include? ?h #=> true
*/
static VALUE
rb_str_include(VALUE str, VALUE arg)
{
long i;
StringValue(arg);
i = rb_str_index(str, arg, 0);
if (i == -1) return Qfalse;
return Qtrue;
}
/*
* call-seq:
* str.to_i(base=10) => integer
*
* Returns the result of interpreting leading characters in <i>str</i> as an
* integer base <i>base</i> (between 2 and 36). Extraneous characters past the
* end of a valid number are ignored. If there is not a valid number at the
* start of <i>str</i>, <code>0</code> is returned. This method never raises an
* exception.
*
* "12345".to_i #=> 12345
* "99 red balloons".to_i #=> 99
* "0a".to_i #=> 0
* "0a".to_i(16) #=> 10
* "hello".to_i #=> 0
* "1100101".to_i(2) #=> 101
* "1100101".to_i(8) #=> 294977
* "1100101".to_i(10) #=> 1100101
* "1100101".to_i(16) #=> 17826049
*/
static VALUE
rb_str_to_i(int argc, VALUE *argv, VALUE str)
{
int base;
if (argc == 0) base = 10;
else {
VALUE b;
rb_scan_args(argc, argv, "01", &b);
base = NUM2INT(b);
}
if (base < 0) {
rb_raise(rb_eArgError, "invalid radix %d", base);
}
return rb_str_to_inum(str, base, Qfalse);
}
/*
* call-seq:
* str.to_f => float
*
* Returns the result of interpreting leading characters in <i>str</i> as a
* floating point number. Extraneous characters past the end of a valid number
* are ignored. If there is not a valid number at the start of <i>str</i>,
* <code>0.0</code> is returned. This method never raises an exception.
*
* "123.45e1".to_f #=> 1234.5
* "45.67 degrees".to_f #=> 45.67
* "thx1138".to_f #=> 0.0
*/
static VALUE
rb_str_to_f(VALUE str)
{
return DBL2NUM(rb_str_to_dbl(str, Qfalse));
}
/*
* call-seq:
* str.to_s => str
* str.to_str => str
*
* Returns the receiver.
*/
static VALUE
rb_str_to_s(VALUE str)
{
if (rb_obj_class(str) != rb_cString) {
return str_duplicate(rb_cString, str);
}
return str;
}
static void
str_cat_char(VALUE str, unsigned int c, rb_encoding *enc)
{
char s[RUBY_MAX_CHAR_LEN];
int n = rb_enc_codelen(c, enc);
rb_enc_mbcput(c, s, enc);
rb_enc_str_buf_cat(str, s, n, enc);
}
static void
prefix_escape(VALUE str, unsigned int c, rb_encoding *enc)
{
str_cat_char(str, '\\', enc);
str_cat_char(str, c, enc);
}
/*
* call-seq:
* str.inspect => string
*
* Returns a printable version of _str_, surrounded by quote marks,
* with special characters escaped.
*
* str = "hello"
* str[3] = "\b"
* str.inspect #=> "\"hel\\bo\""
*/
VALUE
rb_str_inspect(VALUE str)
{
rb_encoding *enc = STR_ENC_GET(str);
char *p, *pend;
VALUE result = rb_str_buf_new(0);
if (!rb_enc_asciicompat(enc)) enc = rb_usascii_encoding();
rb_enc_associate(result, enc);
str_cat_char(result, '"', enc);
p = RSTRING_PTR(str); pend = RSTRING_END(str);
while (p < pend) {
unsigned int c, cc;
int n;
n = rb_enc_precise_mbclen(p, pend, enc);
if (!MBCLEN_CHARFOUND_P(n)) {
p++;
n = 1;
goto escape_codepoint;
}
n = MBCLEN_CHARFOUND_LEN(n);
c = rb_enc_codepoint(p, pend, enc);
n = rb_enc_codelen(c, enc);
p += n;
if (c == '"'|| c == '\\' ||
(c == '#' &&
p < pend &&
MBCLEN_CHARFOUND_P(rb_enc_precise_mbclen(p,pend,enc)) &&
(cc = rb_enc_codepoint(p,pend,enc),
(cc == '$' || cc == '@' || cc == '{')))) {
prefix_escape(result, c, enc);
}
else if (c == '\n') {
prefix_escape(result, 'n', enc);
}
else if (c == '\r') {
prefix_escape(result, 'r', enc);
}
else if (c == '\t') {
prefix_escape(result, 't', enc);
}
else if (c == '\f') {
prefix_escape(result, 'f', enc);
}
else if (c == '\013') {
prefix_escape(result, 'v', enc);
}
else if (c == '\010') {
prefix_escape(result, 'b', enc);
}
else if (c == '\007') {
prefix_escape(result, 'a', enc);
}
else if (c == 033) {
prefix_escape(result, 'e', enc);
}
else if (rb_enc_isprint(c, enc)) {
rb_enc_str_buf_cat(result, p-n, n, enc);
}
else {
char buf[5];
char *s;
char *q;
escape_codepoint:
for (q = p-n; q < p; q++) {
s = buf;
sprintf(buf, "\\x%02X", *q & 0377);
while (*s) {
str_cat_char(result, *s++, enc);
}
}
}
}
str_cat_char(result, '"', enc);
OBJ_INFECT(result, str);
return result;
}
#define IS_EVSTR(p,e) ((p) < (e) && (*(p) == '$' || *(p) == '@' || *(p) == '{'))
/*
* call-seq:
* str.dump => new_str
*
* Produces a version of <i>str</i> with all nonprinting characters replaced by
* <code>\nnn</code> notation and all special characters escaped.
*/
VALUE
rb_str_dump(VALUE str)
{
rb_encoding *enc = rb_enc_get(str);
long len;
const char *p, *pend;
char *q, *qend;
VALUE result;
int u8 = (enc == rb_utf8_encoding());
len = 2; /* "" */
p = RSTRING_PTR(str); pend = p + RSTRING_LEN(str);
while (p < pend) {
unsigned char c = *p++;
switch (c) {
case '"': case '\\':
case '\n': case '\r':
case '\t': case '\f':
case '\013': case '\010': case '\007': case '\033':
len += 2;
break;
case '#':
len += IS_EVSTR(p, pend) ? 2 : 1;
break;
default:
if (ISPRINT(c)) {
len++;
}
else {
if (u8) { /* \u{NN} */
char buf[32];
int n = rb_enc_precise_mbclen(p-1, pend, enc);
if (MBCLEN_CHARFOUND_P(n)) {
int cc = rb_enc_codepoint(p-1, pend, enc);
sprintf(buf, "%x", cc);
len += strlen(buf)+4;
p += MBCLEN_CHARFOUND_LEN(n)-1;
break;
}
}
len += 4; /* \xNN */
}
break;
}
}
if (!rb_enc_asciicompat(enc)) {
len += 19; /* ".force_encoding('')" */
len += strlen(enc->name);
}
result = rb_str_new5(str, 0, len);
p = RSTRING_PTR(str); pend = p + RSTRING_LEN(str);
q = RSTRING_PTR(result); qend = q + len;
*q++ = '"';
while (p < pend) {
unsigned char c = *p++;
if (c == '"' || c == '\\') {
*q++ = '\\';
*q++ = c;
}
else if (c == '#') {
if (IS_EVSTR(p, pend)) *q++ = '\\';
*q++ = '#';
}
else if (c == '\n') {
*q++ = '\\';
*q++ = 'n';
}
else if (c == '\r') {
*q++ = '\\';
*q++ = 'r';
}
else if (c == '\t') {
*q++ = '\\';
*q++ = 't';
}
else if (c == '\f') {
*q++ = '\\';
*q++ = 'f';
}
else if (c == '\013') {
*q++ = '\\';
*q++ = 'v';
}
else if (c == '\010') {
*q++ = '\\';
*q++ = 'b';
}
else if (c == '\007') {
*q++ = '\\';
*q++ = 'a';
}
else if (c == '\033') {
*q++ = '\\';
*q++ = 'e';
}
else if (ISPRINT(c)) {
*q++ = c;
}
else {
*q++ = '\\';
if (u8) {
int n = rb_enc_precise_mbclen(p-1, pend, enc) - 1;
if (MBCLEN_CHARFOUND_P(n)) {
int cc = rb_enc_codepoint(p-1, pend, enc);
p += n;
sprintf(q, "u{%x}", cc);
q += strlen(q);
continue;
}
}
sprintf(q, "x%02X", c);
q += 3;
}
}
*q++ = '"';
*q = '\0';
if (!rb_enc_asciicompat(enc)) {
sprintf(q, ".force_encoding(\"%s\")", enc->name);
enc = rb_ascii8bit_encoding();
}
OBJ_INFECT(result, str);
/* result from dump is ASCII */
rb_enc_associate(result, enc);
ENC_CODERANGE_SET(result, ENC_CODERANGE_7BIT);
return result;
}
static void
rb_str_check_dummy_enc(rb_encoding *enc)
{
if (rb_enc_dummy_p(enc)) {
rb_raise(rb_eEncCompatError, "incompatible encoding with this operation: %s",
rb_enc_name(enc));
}
}
/*
* call-seq:
* str.upcase! => str or nil
*
* Upcases the contents of <i>str</i>, returning <code>nil</code> if no changes
* were made.
* Note: case replacement is effective only in ASCII region.
*/
static VALUE
rb_str_upcase_bang(VALUE str)
{
rb_encoding *enc;
char *s, *send;
int modify = 0;
str_modify_keep_cr(str);
enc = STR_ENC_GET(str);
rb_str_check_dummy_enc(enc);
s = RSTRING_PTR(str); send = RSTRING_END(str);
if (single_byte_optimizable(str)) {
while (s < send) {
unsigned int c = *(unsigned char*)s;
if (rb_enc_isascii(c, enc) && 'a' <= c && c <= 'z') {
*s = 'A' + (c - 'a');
modify = 1;
}
s++;
}
}
else {
int ascompat = rb_enc_asciicompat(enc);
while (s < send) {
unsigned int c;
if (ascompat && (c = *(unsigned char*)s) < 0x80) {
if (rb_enc_isascii(c, enc) && 'a' <= c && c <= 'z') {
*s = 'A' + (c - 'a');
modify = 1;
}
s++;
}
else {
c = rb_enc_codepoint(s, send, enc);
if (rb_enc_islower(c, enc)) {
/* assuming toupper returns codepoint with same size */
rb_enc_mbcput(rb_enc_toupper(c, enc), s, enc);
modify = 1;
}
s += rb_enc_codelen(c, enc);
}
}
}
if (modify) return str;
return Qnil;
}
/*
* call-seq:
* str.upcase => new_str
*
* Returns a copy of <i>str</i> with all lowercase letters replaced with their
* uppercase counterparts. The operation is locale insensitive---only
* characters ``a'' to ``z'' are affected.
* Note: case replacement is effective only in ASCII region.
*
* "hEllO".upcase #=> "HELLO"
*/
static VALUE
rb_str_upcase(VALUE str)
{
str = rb_str_dup(str);
rb_str_upcase_bang(str);
return str;
}
/*
* call-seq:
* str.downcase! => str or nil
*
* Downcases the contents of <i>str</i>, returning <code>nil</code> if no
* changes were made.
* Note: case replacement is effective only in ASCII region.
*/
static VALUE
rb_str_downcase_bang(VALUE str)
{
rb_encoding *enc;
char *s, *send;
int modify = 0;
str_modify_keep_cr(str);
enc = STR_ENC_GET(str);
rb_str_check_dummy_enc(enc);
s = RSTRING_PTR(str); send = RSTRING_END(str);
if (single_byte_optimizable(str)) {
while (s < send) {
unsigned int c = *(unsigned char*)s;
if (rb_enc_isascii(c, enc) && 'A' <= c && c <= 'Z') {
*s = 'a' + (c - 'A');
modify = 1;
}
s++;
}
}
else {
int ascompat = rb_enc_asciicompat(enc);
while (s < send) {
unsigned int c;
if (ascompat && (c = *(unsigned char*)s) < 0x80) {
if (rb_enc_isascii(c, enc) && 'A' <= c && c <= 'Z') {
*s = 'a' + (c - 'A');
modify = 1;
}
s++;
}
else {
c = rb_enc_codepoint(s, send, enc);
if (rb_enc_isupper(c, enc)) {
/* assuming toupper returns codepoint with same size */
rb_enc_mbcput(rb_enc_tolower(c, enc), s, enc);
modify = 1;
}
s += rb_enc_codelen(c, enc);
}
}
}
if (modify) return str;
return Qnil;
}
/*
* call-seq:
* str.downcase => new_str
*
* Returns a copy of <i>str</i> with all uppercase letters replaced with their
* lowercase counterparts. The operation is locale insensitive---only
* characters ``A'' to ``Z'' are affected.
* Note: case replacement is effective only in ASCII region.
*
* "hEllO".downcase #=> "hello"
*/
static VALUE
rb_str_downcase(VALUE str)
{
str = rb_str_dup(str);
rb_str_downcase_bang(str);
return str;
}
/*
* call-seq:
* str.capitalize! => str or nil
*
* Modifies <i>str</i> by converting the first character to uppercase and the
* remainder to lowercase. Returns <code>nil</code> if no changes are made.
* Note: case conversion is effective only in ASCII region.
*
* a = "hello"
* a.capitalize! #=> "Hello"
* a #=> "Hello"
* a.capitalize! #=> nil
*/
static VALUE
rb_str_capitalize_bang(VALUE str)
{
rb_encoding *enc;
char *s, *send;
int modify = 0;
unsigned int c;
str_modify_keep_cr(str);
enc = STR_ENC_GET(str);
rb_str_check_dummy_enc(enc);
if (RSTRING_LEN(str) == 0 || !RSTRING_PTR(str)) return Qnil;
s = RSTRING_PTR(str); send = RSTRING_END(str);
c = rb_enc_codepoint(s, send, enc);
if (rb_enc_islower(c, enc)) {
rb_enc_mbcput(rb_enc_toupper(c, enc), s, enc);
modify = 1;
}
s += rb_enc_codelen(c, enc);
while (s < send) {
c = rb_enc_codepoint(s, send, enc);
if (rb_enc_isupper(c, enc)) {
rb_enc_mbcput(rb_enc_tolower(c, enc), s, enc);
modify = 1;
}
s += rb_enc_codelen(c, enc);
}
if (modify) return str;
return Qnil;
}
/*
* call-seq:
* str.capitalize => new_str
*
* Returns a copy of <i>str</i> with the first character converted to uppercase
* and the remainder to lowercase.
* Note: case conversion is effective only in ASCII region.
*
* "hello".capitalize #=> "Hello"
* "HELLO".capitalize #=> "Hello"
* "123ABC".capitalize #=> "123abc"
*/
static VALUE
rb_str_capitalize(VALUE str)
{
str = rb_str_dup(str);
rb_str_capitalize_bang(str);
return str;
}
/*
* call-seq:
* str.swapcase! => str or nil
*
* Equivalent to <code>String#swapcase</code>, but modifies the receiver in
* place, returning <i>str</i>, or <code>nil</code> if no changes were made.
* Note: case conversion is effective only in ASCII region.
*/
static VALUE
rb_str_swapcase_bang(VALUE str)
{
rb_encoding *enc;
char *s, *send;
int modify = 0;
str_modify_keep_cr(str);
enc = STR_ENC_GET(str);
rb_str_check_dummy_enc(enc);
s = RSTRING_PTR(str); send = RSTRING_END(str);
while (s < send) {
unsigned int c = rb_enc_codepoint(s, send, enc);
if (rb_enc_isupper(c, enc)) {
/* assuming toupper returns codepoint with same size */
rb_enc_mbcput(rb_enc_tolower(c, enc), s, enc);
modify = 1;
}
else if (rb_enc_islower(c, enc)) {
/* assuming tolower returns codepoint with same size */
rb_enc_mbcput(rb_enc_toupper(c, enc), s, enc);
modify = 1;
}
s += rb_enc_mbclen(s, send, enc);
}
if (modify) return str;
return Qnil;
}
/*
* call-seq:
* str.swapcase => new_str
*
* Returns a copy of <i>str</i> with uppercase alphabetic characters converted
* to lowercase and lowercase characters converted to uppercase.
* Note: case conversion is effective only in ASCII region.
*
* "Hello".swapcase #=> "hELLO"
* "cYbEr_PuNk11".swapcase #=> "CyBeR_pUnK11"
*/
static VALUE
rb_str_swapcase(VALUE str)
{
str = rb_str_dup(str);
rb_str_swapcase_bang(str);
return str;
}
typedef unsigned char *USTR;
struct tr {
int gen;
unsigned int now, max;
char *p, *pend;
};
static unsigned int
trnext(struct tr *t, rb_encoding *enc)
{
for (;;) {
if (!t->gen) {
if (t->p == t->pend) return -1;
if (t->p < t->pend - 1 && *t->p == '\\') {
t->p++;
}
t->now = rb_enc_codepoint(t->p, t->pend, enc);
t->p += rb_enc_codelen(t->now, enc);
if (t->p < t->pend - 1 && *t->p == '-') {
t->p++;
if (t->p < t->pend) {
unsigned int c = rb_enc_codepoint(t->p, t->pend, enc);
t->p += rb_enc_codelen(c, enc);
if (t->now > c) continue;
t->gen = 1;
t->max = c;
}
}
return t->now;
}
else if (++t->now < t->max) {
return t->now;
}
else {
t->gen = 0;
return t->max;
}
}
}
static VALUE rb_str_delete_bang(int,VALUE*,VALUE);
static VALUE
tr_trans(VALUE str, VALUE src, VALUE repl, int sflag)
{
const unsigned int errc = -1;
unsigned int trans[256];
rb_encoding *enc, *e1, *e2;
struct tr trsrc, trrepl;
int cflag = 0;
unsigned int c, c0;
int last = 0, modify = 0, i, l;
char *s, *send;
VALUE hash = 0;
int singlebyte = single_byte_optimizable(str);
int cr;
#define CHECK_IF_ASCII(c) \
(void)((cr == ENC_CODERANGE_7BIT && !rb_isascii(c)) ? \
(cr = ENC_CODERANGE_VALID) : 0)
StringValue(src);
StringValue(repl);
if (RSTRING_LEN(str) == 0 || !RSTRING_PTR(str)) return Qnil;
if (RSTRING_LEN(repl) == 0) {
return rb_str_delete_bang(1, &src, str);
}
cr = ENC_CODERANGE(str);
e1 = rb_enc_check(str, src);
e2 = rb_enc_check(str, repl);
if (e1 == e2) {
enc = e1;
}
else {
enc = rb_enc_check(src, repl);
}
trsrc.p = RSTRING_PTR(src); trsrc.pend = trsrc.p + RSTRING_LEN(src);
if (RSTRING_LEN(src) > 1 &&
rb_enc_ascget(trsrc.p, trsrc.pend, &l, enc) == '^' &&
trsrc.p + l < trsrc.pend) {
cflag = 1;
trsrc.p += l;
}
trrepl.p = RSTRING_PTR(repl);
trrepl.pend = trrepl.p + RSTRING_LEN(repl);
trsrc.gen = trrepl.gen = 0;
trsrc.now = trrepl.now = 0;
trsrc.max = trrepl.max = 0;
if (cflag) {
for (i=0; i<256; i++) {
trans[i] = 1;
}
while ((c = trnext(&trsrc, enc)) != errc) {
if (c < 256) {
trans[c] = errc;
}
else {
if (!hash) hash = rb_hash_new();
rb_hash_aset(hash, UINT2NUM(c), Qtrue);
}
}
while ((c = trnext(&trrepl, enc)) != errc)
/* retrieve last replacer */;
last = trrepl.now;
for (i=0; i<256; i++) {
if (trans[i] != errc) {
trans[i] = last;
}
}
}
else {
unsigned int r;
for (i=0; i<256; i++) {
trans[i] = errc;
}
while ((c = trnext(&trsrc, enc)) != errc) {
r = trnext(&trrepl, enc);
if (r == errc) r = trrepl.now;
if (c < 256) {
trans[c] = r;
if (r > 255) singlebyte = 0;
}
else {
if (!hash) hash = rb_hash_new();
rb_hash_aset(hash, UINT2NUM(c), UINT2NUM(r));
}
}
}
if (cr == ENC_CODERANGE_VALID)
cr = ENC_CODERANGE_7BIT;
str_modify_keep_cr(str);
s = RSTRING_PTR(str); send = RSTRING_END(str);
if (sflag) {
int clen, tlen, max = RSTRING_LEN(str);
int offset, save = -1;
char *buf = ALLOC_N(char, max), *t = buf;
while (s < send) {
int may_modify = 0;
c0 = c = rb_enc_codepoint(s, send, e1);
clen = rb_enc_codelen(c, e1);
tlen = enc == e1 ? clen : rb_enc_codelen(c, enc);
s += clen;
if (c < 256) {
c = trans[c];
}
else if (hash) {
VALUE tmp = rb_hash_lookup(hash, UINT2NUM(c));
if (NIL_P(tmp)) {
if (cflag) c = last;
else c = errc;
}
else if (cflag) c = errc;
else c = NUM2INT(tmp);
}
else {
c = errc;
}
if (c != -1) {
if (save == c) {
CHECK_IF_ASCII(c);
continue;
}
save = c;
tlen = rb_enc_codelen(c, enc);
modify = 1;
}
else {
save = -1;
c = c0;
if (enc != e1) may_modify = 1;
}
while (t - buf + tlen >= max) {
offset = t - buf;
max *= 2;
REALLOC_N(buf, char, max);
t = buf + offset;
}
rb_enc_mbcput(c, t, enc);
if (may_modify && memcmp(s, t, tlen) != 0) {
modify = 1;
}
CHECK_IF_ASCII(c);
t += tlen;
}
*t = '\0';
RSTRING(str)->as.heap.ptr = buf;
RSTRING(str)->as.heap.len = t - buf;
STR_SET_NOEMBED(str);
RSTRING(str)->as.heap.aux.capa = max;
}
else if (rb_enc_mbmaxlen(enc) == 1 || (singlebyte && !hash)) {
while (s < send) {
c = (unsigned char)*s;
if (trans[c] != errc) {
if (!cflag) {
c = trans[c];
*s = c;
modify = 1;
}
else {
*s = last;
modify = 1;
}
}
CHECK_IF_ASCII(c);
s++;
}
}
else {
int clen, tlen, max = RSTRING_LEN(str) * 1.2;
int offset;
char *buf = ALLOC_N(char, max), *t = buf;
while (s < send) {
int may_modify = 0;
c0 = c = rb_enc_codepoint(s, send, e1);
clen = rb_enc_codelen(c, e1);
tlen = enc == e1 ? clen : rb_enc_codelen(c, enc);
if (c < 256) {
c = trans[c];
}
else if (hash) {
VALUE tmp = rb_hash_lookup(hash, UINT2NUM(c));
if (NIL_P(tmp)) {
if (cflag) c = last;
else c = errc;
}
else if (cflag) c = errc;
else c = NUM2INT(tmp);
}
else {
c = errc;
}
if (c != errc) {
tlen = rb_enc_codelen(c, enc);
modify = 1;
}
else {
c = c0;
if (enc != e1) may_modify = 1;
}
while (t - buf + tlen >= max) {
offset = t - buf;
max *= 2;
REALLOC_N(buf, char, max);
t = buf + offset;
}
if (s != t) {
rb_enc_mbcput(c, t, enc);
if (may_modify && memcmp(s, t, tlen) != 0) {
modify = 1;
}
}
CHECK_IF_ASCII(c);
s += clen;
t += tlen;
}
if (!STR_EMBED_P(str)) {
xfree(RSTRING(str)->as.heap.ptr);
}
*t = '\0';
RSTRING(str)->as.heap.ptr = buf;
RSTRING(str)->as.heap.len = t - buf;
STR_SET_NOEMBED(str);
RSTRING(str)->as.heap.aux.capa = max;
}
if (modify) {
if (cr != ENC_CODERANGE_BROKEN)
ENC_CODERANGE_SET(str, cr);
rb_enc_associate(str, enc);
return str;
}
return Qnil;
}
/*
* call-seq:
* str.tr!(from_str, to_str) => str or nil
*
* Translates <i>str</i> in place, using the same rules as
* <code>String#tr</code>. Returns <i>str</i>, or <code>nil</code> if no
* changes were made.
*/
static VALUE
rb_str_tr_bang(VALUE str, VALUE src, VALUE repl)
{
return tr_trans(str, src, repl, 0);
}
/*
* call-seq:
* str.tr(from_str, to_str) => new_str
*
* Returns a copy of <i>str</i> with the characters in <i>from_str</i> replaced
* by the corresponding characters in <i>to_str</i>. If <i>to_str</i> is
* shorter than <i>from_str</i>, it is padded with its last character. Both
* strings may use the c1--c2 notation to denote ranges of characters, and
* <i>from_str</i> may start with a <code>^</code>, which denotes all
* characters except those listed.
*
* "hello".tr('aeiou', '*') #=> "h*ll*"
* "hello".tr('^aeiou', '*') #=> "*e**o"
* "hello".tr('el', 'ip') #=> "hippo"
* "hello".tr('a-y', 'b-z') #=> "ifmmp"
*/
static VALUE
rb_str_tr(VALUE str, VALUE src, VALUE repl)
{
str = rb_str_dup(str);
tr_trans(str, src, repl, 0);
return str;
}
static void
tr_setup_table(VALUE str, char stable[256], int first,
VALUE *tablep, VALUE *ctablep, rb_encoding *enc)
{
const unsigned int errc = -1;
char buf[256];
struct tr tr;
unsigned int c;
VALUE table = 0, ptable = 0;
int i, l, cflag = 0;
tr.p = RSTRING_PTR(str); tr.pend = tr.p + RSTRING_LEN(str);
tr.gen = tr.now = tr.max = 0;
if (RSTRING_LEN(str) > 1 && rb_enc_ascget(tr.p, tr.pend, &l, enc) == '^') {
cflag = 1;
tr.p += l;
}
if (first) {
for (i=0; i<256; i++) {
stable[i] = 1;
}
}
for (i=0; i<256; i++) {
buf[i] = cflag;
}
while ((c = trnext(&tr, enc)) != errc) {
if (c < 256) {
buf[c & 0xff] = !cflag;
}
else {
VALUE key = UINT2NUM(c);
if (!table) {
table = rb_hash_new();
if (cflag) {
ptable = *ctablep;
*ctablep = table;
}
else {
ptable = *tablep;
*tablep = table;
}
}
if (!ptable || !NIL_P(rb_hash_aref(ptable, key))) {
rb_hash_aset(table, key, Qtrue);
}
}
}
for (i=0; i<256; i++) {
stable[i] = stable[i] && buf[i];
}
}
static int
tr_find(unsigned int c, char table[256], VALUE del, VALUE nodel)
{
if (c < 256) {
return table[c] ? Qtrue : Qfalse;
}
else {
VALUE v = UINT2NUM(c);
if (del && !NIL_P(rb_hash_lookup(del, v))) {
if (!nodel || NIL_P(rb_hash_lookup(nodel, v))) {
return Qtrue;
}
}
return Qfalse;
}
}
/*
* call-seq:
* str.delete!([other_str]+) => str or nil
*
* Performs a <code>delete</code> operation in place, returning <i>str</i>, or
* <code>nil</code> if <i>str</i> was not modified.
*/
static VALUE
rb_str_delete_bang(int argc, VALUE *argv, VALUE str)
{
char squeez[256];
rb_encoding *enc = 0;
char *s, *send, *t;
VALUE del = 0, nodel = 0;
int modify = 0;
int i, ascompat, cr;
if (RSTRING_LEN(str) == 0 || !RSTRING_PTR(str)) return Qnil;
if (argc < 1) {
rb_raise(rb_eArgError, "wrong number of arguments");
}
for (i=0; i<argc; i++) {
VALUE s = argv[i];
StringValue(s);
enc = rb_enc_check(str, s);
tr_setup_table(s, squeez, i==0, &del, &nodel, enc);
}
str_modify_keep_cr(str);
ascompat = rb_enc_asciicompat(enc);
s = t = RSTRING_PTR(str);
send = RSTRING_END(str);
cr = ascompat ? ENC_CODERANGE_7BIT : ENC_CODERANGE_VALID;
while (s < send) {
unsigned int c;
int clen;
if (ascompat && (c = *(unsigned char*)s) < 0x80) {
if (squeez[c]) {
modify = 1;
}
else {
if (t != s) *t = c;
t++;
}
s++;
}
else {
c = rb_enc_codepoint(s, send, enc);
clen = rb_enc_codelen(c, enc);
if (tr_find(c, squeez, del, nodel)) {
modify = 1;
}
else {
if (t != s) rb_enc_mbcput(c, t, enc);
t += clen;
if (cr == ENC_CODERANGE_7BIT) cr = ENC_CODERANGE_VALID;
}
s += clen;
}
}
*t = '\0';
STR_SET_LEN(str, t - RSTRING_PTR(str));
ENC_CODERANGE_SET(str, cr);
if (modify) return str;
return Qnil;
}
/*
* call-seq:
* str.delete([other_str]+) => new_str
*
* Returns a copy of <i>str</i> with all characters in the intersection of its
* arguments deleted. Uses the same rules for building the set of characters as
* <code>String#count</code>.
*
* "hello".delete "l","lo" #=> "heo"
* "hello".delete "lo" #=> "he"
* "hello".delete "aeiou", "^e" #=> "hell"
* "hello".delete "ej-m" #=> "ho"
*/
static VALUE
rb_str_delete(int argc, VALUE *argv, VALUE str)
{
str = rb_str_dup(str);
rb_str_delete_bang(argc, argv, str);
return str;
}
/*
* call-seq:
* str.squeeze!([other_str]*) => str or nil
*
* Squeezes <i>str</i> in place, returning either <i>str</i>, or
* <code>nil</code> if no changes were made.
*/
static VALUE
rb_str_squeeze_bang(int argc, VALUE *argv, VALUE str)
{
char squeez[256];
rb_encoding *enc = 0;
VALUE del = 0, nodel = 0;
char *s, *send, *t;
int save, modify = 0;
int i;
int ascompat, singlebyte = single_byte_optimizable(str);
if (argc == 0) {
enc = STR_ENC_GET(str);
}
else {
for (i=0; i<argc; i++) {
VALUE s = argv[i];
StringValue(s);
enc = rb_enc_check(str, s);
if (singlebyte && !single_byte_optimizable(s))
singlebyte = 0;
tr_setup_table(s, squeez, i==0, &del, &nodel, enc);
}
}
str_modify_keep_cr(str);
s = t = RSTRING_PTR(str);
if (!s || RSTRING_LEN(str) == 0) return Qnil;
send = RSTRING_END(str);
save = -1;
ascompat = rb_enc_asciicompat(enc);
if (singlebyte) {
while (s < send) {
unsigned int c = *(unsigned char*)s++;
if (c != save || (argc > 0 && !squeez[c])) {
*t++ = save = c;
}
}
} else {
while (s < send) {
unsigned int c;
int clen;
if (ascompat && (c = *(unsigned char*)s) < 0x80) {
if (c != save || (argc > 0 && !squeez[c])) {
*t++ = save = c;
}
s++;
}
else {
c = rb_enc_codepoint(s, send, enc);
clen = rb_enc_codelen(c, enc);
if (c != save || (argc > 0 && !tr_find(c, squeez, del, nodel))) {
if (t != s) rb_enc_mbcput(c, t, enc);
save = c;
t += clen;
}
s += clen;
}
}
}
*t = '\0';
if (t - RSTRING_PTR(str) != RSTRING_LEN(str)) {
STR_SET_LEN(str, t - RSTRING_PTR(str));
modify = 1;
}
if (modify) return str;
return Qnil;
}
/*
* call-seq:
* str.squeeze([other_str]*) => new_str
*
* Builds a set of characters from the <i>other_str</i> parameter(s) using the
* procedure described for <code>String#count</code>. Returns a new string
* where runs of the same character that occur in this set are replaced by a
* single character. If no arguments are given, all runs of identical
* characters are replaced by a single character.
*
* "yellow moon".squeeze #=> "yelow mon"
* " now is the".squeeze(" ") #=> " now is the"
* "putters shoot balls".squeeze("m-z") #=> "puters shot balls"
*/
static VALUE
rb_str_squeeze(int argc, VALUE *argv, VALUE str)
{
str = rb_str_dup(str);
rb_str_squeeze_bang(argc, argv, str);
return str;
}
/*
* call-seq:
* str.tr_s!(from_str, to_str) => str or nil
*
* Performs <code>String#tr_s</code> processing on <i>str</i> in place,
* returning <i>str</i>, or <code>nil</code> if no changes were made.
*/
static VALUE
rb_str_tr_s_bang(VALUE str, VALUE src, VALUE repl)
{
return tr_trans(str, src, repl, 1);
}
/*
* call-seq:
* str.tr_s(from_str, to_str) => new_str
*
* Processes a copy of <i>str</i> as described under <code>String#tr</code>,
* then removes duplicate characters in regions that were affected by the
* translation.
*
* "hello".tr_s('l', 'r') #=> "hero"
* "hello".tr_s('el', '*') #=> "h*o"
* "hello".tr_s('el', 'hx') #=> "hhxo"
*/
static VALUE
rb_str_tr_s(VALUE str, VALUE src, VALUE repl)
{
str = rb_str_dup(str);
tr_trans(str, src, repl, 1);
return str;
}
/*
* call-seq:
* str.count([other_str]+) => fixnum
*
* Each <i>other_str</i> parameter defines a set of characters to count. The
* intersection of these sets defines the characters to count in
* <i>str</i>. Any <i>other_str</i> that starts with a caret (^) is
* negated. The sequence c1--c2 means all characters between c1 and c2.
*
* a = "hello world"
* a.count "lo" #=> 5
* a.count "lo", "o" #=> 2
* a.count "hello", "^l" #=> 4
* a.count "ej-m" #=> 4
*/
static VALUE
rb_str_count(int argc, VALUE *argv, VALUE str)
{
char table[256];
rb_encoding *enc = 0;
VALUE del = 0, nodel = 0;
char *s, *send;
int i;
int ascompat;
if (argc < 1) {
rb_raise(rb_eArgError, "wrong number of arguments");
}
for (i=0; i<argc; i++) {
VALUE s = argv[i];
StringValue(s);
enc = rb_enc_check(str, s);
tr_setup_table(s, table, i==0, &del, &nodel, enc);
}
s = RSTRING_PTR(str);
if (!s || RSTRING_LEN(str) == 0) return INT2FIX(0);
send = RSTRING_END(str);
i = 0;
ascompat = rb_enc_asciicompat(enc);
while (s < send) {
unsigned int c;
int clen;
if (ascompat && (c = *(unsigned char*)s) < 0x80) {
clen = 1;
if (table[c]) {
i++;
}
s++;
}
else {
c = rb_enc_codepoint(s, send, enc);
clen = rb_enc_codelen(c, enc);
if (tr_find(c, table, del, nodel)) {
i++;
}
s += clen;
}
}
return INT2NUM(i);
}
/*
* call-seq:
* str.split(pattern=$;, [limit]) => anArray
*
* Divides <i>str</i> into substrings based on a delimiter, returning an array
* of these substrings.
*
* If <i>pattern</i> is a <code>String</code>, then its contents are used as
* the delimiter when splitting <i>str</i>. If <i>pattern</i> is a single
* space, <i>str</i> is split on whitespace, with leading whitespace and runs
* of contiguous whitespace characters ignored.
*
* If <i>pattern</i> is a <code>Regexp</code>, <i>str</i> is divided where the
* pattern matches. Whenever the pattern matches a zero-length string,
* <i>str</i> is split into individual characters. If <i>pattern</i> contains
* groups, the respective matches will be returned in the array as well.
*
* If <i>pattern</i> is omitted, the value of <code>$;</code> is used. If
* <code>$;</code> is <code>nil</code> (which is the default), <i>str</i> is
* split on whitespace as if ` ' were specified.
*
* If the <i>limit</i> parameter is omitted, trailing null fields are
* suppressed. If <i>limit</i> is a positive number, at most that number of
* fields will be returned (if <i>limit</i> is <code>1</code>, the entire
* string is returned as the only entry in an array). If negative, there is no
* limit to the number of fields returned, and trailing null fields are not
* suppressed.
*
* " now's the time".split #=> ["now's", "the", "time"]
* " now's the time".split(' ') #=> ["now's", "the", "time"]
* " now's the time".split(/ /) #=> ["", "now's", "", "the", "time"]
* "1, 2.34,56, 7".split(%r{,\s*}) #=> ["1", "2.34", "56", "7"]
* "hello".split(//) #=> ["h", "e", "l", "l", "o"]
* "hello".split(//, 3) #=> ["h", "e", "llo"]
* "hi mom".split(%r{\s*}) #=> ["h", "i", "m", "o", "m"]
*
* "mellow yellow".split("ello") #=> ["m", "w y", "w"]
* "1,2,,3,4,,".split(',') #=> ["1", "2", "", "3", "4"]
* "1,2,,3,4,,".split(',', 4) #=> ["1", "2", "", "3,4,,"]
* "1,2,,3,4,,".split(',', -4) #=> ["1", "2", "", "3", "4", "", ""]
*/
static VALUE
rb_str_split_m(int argc, VALUE *argv, VALUE str)
{
rb_encoding *enc;
VALUE spat;
VALUE limit;
enum {awk, string, regexp} split_type;
long beg, end, i = 0;
int lim = 0;
VALUE result, tmp;
if (rb_scan_args(argc, argv, "02", &spat, &limit) == 2) {
lim = NUM2INT(limit);
if (lim <= 0) limit = Qnil;
else if (lim == 1) {
if (RSTRING_LEN(str) == 0)
return rb_ary_new2(0);
return rb_ary_new3(1, str);
}
i = 1;
}
enc = STR_ENC_GET(str);
if (NIL_P(spat)) {
if (!NIL_P(rb_fs)) {
spat = rb_fs;
goto fs_set;
}
split_type = awk;
}
else {
fs_set:
if (TYPE(spat) == T_STRING) {
rb_encoding *enc2 = STR_ENC_GET(spat);
split_type = string;
if (RSTRING_LEN(spat) == 0) {
/* Special case - split into chars */
spat = rb_reg_regcomp(spat);
split_type = regexp;
}
else if (rb_enc_asciicompat(enc2) == 1) {
if (RSTRING_LEN(spat) == 1 && RSTRING_PTR(spat)[0] == ' '){
split_type = awk;
}
}
else {
int l;
if (rb_enc_ascget(RSTRING_PTR(spat), RSTRING_END(spat), &l, enc2) == ' ' &&
RSTRING_LEN(spat) == l) {
split_type = awk;
}
}
}
else {
spat = get_pat(spat, 1);
split_type = regexp;
}
}
result = rb_ary_new();
beg = 0;
if (split_type == awk) {
char *ptr = RSTRING_PTR(str);
char *eptr = RSTRING_END(str);
char *bptr = ptr;
int skip = 1;
unsigned int c;
end = beg;
while (ptr < eptr) {
c = rb_enc_codepoint(ptr, eptr, enc);
ptr += rb_enc_mbclen(ptr, eptr, enc);
if (skip) {
if (rb_enc_isspace(c, enc)) {
beg = ptr - bptr;
}
else {
end = ptr - bptr;
skip = 0;
if (!NIL_P(limit) && lim <= i) break;
}
}
else {
if (rb_enc_isspace(c, enc)) {
rb_ary_push(result, rb_str_subseq(str, beg, end-beg));
skip = 1;
beg = ptr - bptr;
if (!NIL_P(limit)) ++i;
}
else {
end = ptr - bptr;
}
}
}
}
else if (split_type == string) {
char *ptr = RSTRING_PTR(str);
char *eptr = RSTRING_END(str);
char *sptr = RSTRING_PTR(spat);
int slen = RSTRING_LEN(spat);
if (is_broken_string(str)) {
rb_raise(rb_eArgError, "invalid byte sequence in %s", rb_enc_name(STR_ENC_GET(str)));
}
if (is_broken_string(spat)) {
rb_raise(rb_eArgError, "invalid byte sequence in %s", rb_enc_name(STR_ENC_GET(spat)));
}
enc = rb_enc_check(str, spat);
while (ptr < eptr &&
(end = rb_memsearch(sptr, slen, ptr, eptr - ptr, enc)) >= 0) {
/* Check we are at the start of a char */
char *t = rb_enc_right_char_head(ptr, ptr + end, eptr, enc);
if (t != ptr + end) {
ptr = t;
continue;
}
rb_ary_push(result, rb_str_subseq(str, ptr - RSTRING_PTR(str), end));
ptr += end + slen;
if (!NIL_P(limit) && lim <= ++i) break;
}
beg = ptr - RSTRING_PTR(str);
}
else {
long start = beg;
long idx;
int last_null = 0;
struct re_registers *regs;
while ((end = rb_reg_search(spat, str, start, 0)) >= 0) {
regs = RMATCH_REGS(rb_backref_get());
if (start == end && BEG(0) == END(0)) {
if (!RSTRING_PTR(str)) {
rb_ary_push(result, rb_str_new("", 0));
break;
}
else if (last_null == 1) {
rb_ary_push(result, rb_str_subseq(str, beg,
rb_enc_mbclen(RSTRING_PTR(str)+beg,
RSTRING_END(str),
enc)));
beg = start;
}
else {
if (RSTRING_PTR(str)+start == RSTRING_END(str))
start++;
else
start += rb_enc_mbclen(RSTRING_PTR(str)+start,RSTRING_END(str),enc);
last_null = 1;
continue;
}
}
else {
rb_ary_push(result, rb_str_subseq(str, beg, end-beg));
beg = start = END(0);
}
last_null = 0;
for (idx=1; idx < regs->num_regs; idx++) {
if (BEG(idx) == -1) continue;
if (BEG(idx) == END(idx))
tmp = rb_str_new5(str, 0, 0);
else
tmp = rb_str_subseq(str, BEG(idx), END(idx)-BEG(idx));
rb_ary_push(result, tmp);
}
if (!NIL_P(limit) && lim <= ++i) break;
}
}
if (RSTRING_LEN(str) > 0 && (!NIL_P(limit) || RSTRING_LEN(str) > beg || lim < 0)) {
if (RSTRING_LEN(str) == beg)
tmp = rb_str_new5(str, 0, 0);
else
tmp = rb_str_subseq(str, beg, RSTRING_LEN(str)-beg);
rb_ary_push(result, tmp);
}
if (NIL_P(limit) && lim == 0) {
long len;
while ((len = RARRAY_LEN(result)) > 0 &&
(tmp = RARRAY_PTR(result)[len-1], RSTRING_LEN(tmp) == 0))
rb_ary_pop(result);
}
return result;
}
VALUE
rb_str_split(VALUE str, const char *sep0)
{
VALUE sep;
StringValue(str);
sep = rb_str_new2(sep0);
return rb_str_split_m(1, &sep, str);
}
/*
* Document-method: lines
* call-seq:
* str.lines(separator=$/) => anEnumerator
* str.lines(separator=$/) {|substr| block } => str
*
* Returns an enumerator that gives each line in the string. If a block is
* given, it iterates over each line in the string.
*
* "foo\nbar\n".lines.to_a #=> ["foo\n", "bar\n"]
* "foo\nb ar".lines.sort #=> ["b ar", "foo\n"]
*/
/*
* Document-method: each_line
* call-seq:
* str.each_line(separator=$/) {|substr| block } => str
*
* Splits <i>str</i> using the supplied parameter as the record separator
* (<code>$/</code> by default), passing each substring in turn to the supplied
* block. If a zero-length record separator is supplied, the string is split
* into paragraphs delimited by multiple successive newlines.
*
* print "Example one\n"
* "hello\nworld".each {|s| p s}
* print "Example two\n"
* "hello\nworld".each('l') {|s| p s}
* print "Example three\n"
* "hello\n\n\nworld".each('') {|s| p s}
*
* <em>produces:</em>
*
* Example one
* "hello\n"
* "world"
* Example two
* "hel"
* "l"
* "o\nworl"
* "d"
* Example three
* "hello\n\n\n"
* "world"
*/
static VALUE
rb_str_each_line(int argc, VALUE *argv, VALUE str)
{
rb_encoding *enc;
VALUE rs;
unsigned int newline;
const char *p, *pend, *s, *ptr;
long len, rslen;
VALUE line;
int n;
VALUE orig = str;
if (argc == 0) {
rs = rb_rs;
}
else {
rb_scan_args(argc, argv, "01", &rs);
}
RETURN_ENUMERATOR(str, argc, argv);
if (NIL_P(rs)) {
rb_yield(str);
return orig;
}
str = rb_str_new4(str);
ptr = p = s = RSTRING_PTR(str);
pend = p + RSTRING_LEN(str);
len = RSTRING_LEN(str);
StringValue(rs);
if (rs == rb_default_rs) {
enc = rb_enc_get(str);
while (p < pend) {
char *p0;
p = memchr(p, '\n', pend - p);
if (!p) break;
p0 = rb_enc_left_char_head(s, p, pend, enc);
if (!rb_enc_is_newline(p0, pend, enc)) {
p++;
continue;
}
p = p0 + rb_enc_mbclen(p0, pend, enc);
line = rb_str_new5(str, s, p - s);
OBJ_INFECT(line, str);
rb_enc_cr_str_copy_for_substr(line, str);
rb_yield(line);
str_mod_check(str, ptr, len);
s = p;
}
goto finish;
}
enc = rb_enc_check(str, rs);
rslen = RSTRING_LEN(rs);
if (rslen == 0) {
newline = '\n';
}
else {
newline = rb_enc_codepoint(RSTRING_PTR(rs), RSTRING_END(rs), enc);
}
while (p < pend) {
unsigned int c = rb_enc_codepoint(p, pend, enc);
again:
n = rb_enc_codelen(c, enc);
if (rslen == 0 && c == newline) {
p += n;
if (p < pend && (c = rb_enc_codepoint(p, pend, enc)) != newline) {
goto again;
}
while (p < pend && rb_enc_codepoint(p, pend, enc) == newline) {
p += n;
}
p -= n;
}
if (c == newline &&
(rslen <= 1 || memcmp(RSTRING_PTR(rs), p, rslen) == 0)) {
line = rb_str_new5(str, s, p - s + (rslen ? rslen : n));
OBJ_INFECT(line, str);
rb_enc_cr_str_copy_for_substr(line, str);
rb_yield(line);
str_mod_check(str, ptr, len);
s = p + (rslen ? rslen : n);
}
p += n;
}
finish:
if (s != pend) {
line = rb_str_new5(str, s, pend - s);
OBJ_INFECT(line, str);
rb_enc_cr_str_copy_for_substr(line, str);
rb_yield(line);
}
return orig;
}
/*
* Document-method: bytes
* call-seq:
* str.bytes => anEnumerator
* str.bytes {|fixnum| block } => str
*
* Returns an enumerator that gives each byte in the string. If a block is
* given, it iterates over each byte in the string.
*
* "hello".bytes.to_a #=> [104, 101, 108, 108, 111]
*/
/*
* Document-method: each_byte
* call-seq:
* str.each_byte {|fixnum| block } => str
*
* Passes each byte in <i>str</i> to the given block.
*
* "hello".each_byte {|c| print c, ' ' }
*
* <em>produces:</em>
*
* 104 101 108 108 111
*/
static VALUE
rb_str_each_byte(VALUE str)
{
long i;
RETURN_ENUMERATOR(str, 0, 0);
for (i=0; i<RSTRING_LEN(str); i++) {
rb_yield(INT2FIX(RSTRING_PTR(str)[i] & 0xff));
}
return str;
}
/*
* Document-method: chars
* call-seq:
* str.chars => anEnumerator
* str.chars {|substr| block } => str
*
* Returns an enumerator that gives each character in the string.
* If a block is given, it iterates over each character in the string.
*
* "foo".chars.to_a #=> ["f","o","o"]
*/
/*
* Document-method: each_char
* call-seq:
* str.each_char {|cstr| block } => str
*
* Passes each character in <i>str</i> to the given block.
*
* "hello".each_char {|c| print c, ' ' }
*
* <em>produces:</em>
*
* h e l l o
*/
static VALUE
rb_str_each_char(VALUE str)
{
int i, len, n;
const char *ptr;
rb_encoding *enc;
RETURN_ENUMERATOR(str, 0, 0);
str = rb_str_new4(str);
ptr = RSTRING_PTR(str);
len = RSTRING_LEN(str);
enc = rb_enc_get(str);
for (i = 0; i < len; i += n) {
n = rb_enc_mbclen(ptr + i, ptr + len, enc);
rb_yield(rb_str_subseq(str, i, n));
}
return str;
}
/*
* Document-method: codepoints
* call-seq:
* str.codepoints => anEnumerator
* str.codepoints {|fixnum| block } => str
*
* Returns an enumerator that gives the <code>Integer</code> ordinal
* of each character in the string, also known as a <i>codepoint</i>
* when applied to Unicode strings. If a block is given, it iterates
* over each character in the string.
*
* "foo\u0635".codepoints.to_a #=> [102, 111, 111, 1589]
*/
/*
* Document-method: each_codepoint
* call-seq:
* str.each_codepoint {|integer| block } => str
*
* Passes the <code>Integer</code> ordinal of each character in <i>str</i>,
* also known as a <i>codepoint</i> when applied to Unicode strings to the
* given block.
*
* "hello\u0639".each_codepoint {|c| print c, ' ' }
*
* <em>produces:</em>
*
* 104 101 108 108 111 1593
*/
static VALUE
rb_str_each_codepoint(VALUE str)
{
int len, n;
unsigned int c;
const char *ptr, *end;
rb_encoding *enc;
if (single_byte_optimizable(str)) return rb_str_each_byte(str);
RETURN_ENUMERATOR(str, 0, 0);
ptr = RSTRING_PTR(str);
len = RSTRING_LEN(str);
end = RSTRING_END(str);
enc = STR_ENC_GET(str);
while (ptr < end) {
c = rb_enc_codepoint(ptr, end, enc);
n = rb_enc_codelen(c, enc);
rb_yield(UINT2NUM(c));
ptr += n;
}
return str;
}
static long
chopped_length(VALUE str)
{
rb_encoding *enc = STR_ENC_GET(str);
const char *p, *p2, *beg, *end;
beg = RSTRING_PTR(str);
end = beg + RSTRING_LEN(str);
if (beg > end) return 0;
p = rb_enc_prev_char(beg, end, end, enc);
if (!p) return 0;
if (p > beg && rb_enc_codepoint(p, end, enc) == '\n') {
p2 = rb_enc_prev_char(beg, p, end, enc);
if (p2 && rb_enc_codepoint(p2, end, enc) == '\r') p = p2;
}
return p - beg;
}
/*
* call-seq:
* str.chop! => str or nil
*
* Processes <i>str</i> as for <code>String#chop</code>, returning <i>str</i>,
* or <code>nil</code> if <i>str</i> is the empty string. See also
* <code>String#chomp!</code>.
*/
static VALUE
rb_str_chop_bang(VALUE str)
{
if (RSTRING_LEN(str) > 0) {
long len;
str_modify_keep_cr(str);
len = chopped_length(str);
STR_SET_LEN(str, len);
RSTRING_PTR(str)[len] = '\0';
return str;
}
return Qnil;
}
/*
* call-seq:
* str.chop => new_str
*
* Returns a new <code>String</code> with the last character removed. If the
* string ends with <code>\r\n</code>, both characters are removed. Applying
* <code>chop</code> to an empty string returns an empty
* string. <code>String#chomp</code> is often a safer alternative, as it leaves
* the string unchanged if it doesn't end in a record separator.
*
* "string\r\n".chop #=> "string"
* "string\n\r".chop #=> "string\n"
* "string\n".chop #=> "string"
* "string".chop #=> "strin"
* "x".chop.chop #=> ""
*/
static VALUE
rb_str_chop(VALUE str)
{
VALUE str2 = rb_str_new5(str, RSTRING_PTR(str), chopped_length(str));
rb_enc_cr_str_copy_for_substr(str2, str);
OBJ_INFECT(str2, str);
return str2;
}
/*
* call-seq:
* str.chomp!(separator=$/) => str or nil
*
* Modifies <i>str</i> in place as described for <code>String#chomp</code>,
* returning <i>str</i>, or <code>nil</code> if no modifications were made.
*/
static VALUE
rb_str_chomp_bang(int argc, VALUE *argv, VALUE str)
{
rb_encoding *enc;
VALUE rs;
int newline;
char *p, *pp, *e;
long len, rslen;
len = RSTRING_LEN(str);
if (len == 0) return Qnil;
p = RSTRING_PTR(str);
e = p + len;
if (argc == 0) {
rs = rb_rs;
if (rs == rb_default_rs) {
smart_chomp:
str_modify_keep_cr(str);
enc = rb_enc_get(str);
if (rb_enc_mbminlen(enc) > 1) {
pp = rb_enc_left_char_head(p, e-rb_enc_mbminlen(enc), e, enc);
if (rb_enc_is_newline(pp, e, enc)) {
e = pp;
}
pp = e - rb_enc_mbminlen(enc);
if (pp >= p) {
pp = rb_enc_left_char_head(p, pp, e, enc);
if (rb_enc_ascget(pp, e, 0, enc) == '\r') {
e = pp;
}
}
if (e == RSTRING_END(str)) {
return Qnil;
}
len = e - RSTRING_PTR(str);
STR_SET_LEN(str, len);
}
else {
if (RSTRING_PTR(str)[len-1] == '\n') {
STR_DEC_LEN(str);
if (RSTRING_LEN(str) > 0 &&
RSTRING_PTR(str)[RSTRING_LEN(str)-1] == '\r') {
STR_DEC_LEN(str);
}
}
else if (RSTRING_PTR(str)[len-1] == '\r') {
STR_DEC_LEN(str);
}
else {
return Qnil;
}
}
RSTRING_PTR(str)[RSTRING_LEN(str)] = '\0';
return str;
}
}
else {
rb_scan_args(argc, argv, "01", &rs);
}
if (NIL_P(rs)) return Qnil;
StringValue(rs);
rslen = RSTRING_LEN(rs);
if (rslen == 0) {
while (len>0 && p[len-1] == '\n') {
len--;
if (len>0 && p[len-1] == '\r')
len--;
}
if (len < RSTRING_LEN(str)) {
str_modify_keep_cr(str);
STR_SET_LEN(str, len);
RSTRING_PTR(str)[len] = '\0';
return str;
}
return Qnil;
}
if (rslen > len) return Qnil;
newline = RSTRING_PTR(rs)[rslen-1];
if (rslen == 1 && newline == '\n')
goto smart_chomp;
enc = rb_enc_check(str, rs);
if (is_broken_string(rs)) {
return Qnil;
}
pp = e - rslen;
if (p[len-1] == newline &&
(rslen <= 1 ||
memcmp(RSTRING_PTR(rs), pp, rslen) == 0)) {
if (rb_enc_left_char_head(p, pp, e, enc) != pp)
return Qnil;
rb_str_modify(str);
STR_SET_LEN(str, RSTRING_LEN(str) - rslen);
RSTRING_PTR(str)[RSTRING_LEN(str)] = '\0';
return str;
}
return Qnil;
}
/*
* call-seq:
* str.chomp(separator=$/) => new_str
*
* Returns a new <code>String</code> with the given record separator removed
* from the end of <i>str</i> (if present). If <code>$/</code> has not been
* changed from the default Ruby record separator, then <code>chomp</code> also
* removes carriage return characters (that is it will remove <code>\n</code>,
* <code>\r</code>, and <code>\r\n</code>).
*
* "hello".chomp #=> "hello"
* "hello\n".chomp #=> "hello"
* "hello\r\n".chomp #=> "hello"
* "hello\n\r".chomp #=> "hello\n"
* "hello\r".chomp #=> "hello"
* "hello \n there".chomp #=> "hello \n there"
* "hello".chomp("llo") #=> "he"
*/
static VALUE
rb_str_chomp(int argc, VALUE *argv, VALUE str)
{
str = rb_str_dup(str);
rb_str_chomp_bang(argc, argv, str);
return str;
}
/*
* call-seq:
* str.lstrip! => self or nil
*
* Removes leading whitespace from <i>str</i>, returning <code>nil</code> if no
* change was made. See also <code>String#rstrip!</code> and
* <code>String#strip!</code>.
*
* " hello ".lstrip #=> "hello "
* "hello".lstrip! #=> nil
*/
static VALUE
rb_str_lstrip_bang(VALUE str)
{
rb_encoding *enc;
char *s, *t, *e;
str_modify_keep_cr(str);
enc = STR_ENC_GET(str);
s = RSTRING_PTR(str);
if (!s || RSTRING_LEN(str) == 0) return Qnil;
e = t = RSTRING_END(str);
/* remove spaces at head */
while (s < e) {
unsigned int cc = rb_enc_codepoint(s, e, enc);
if (!rb_enc_isspace(cc, enc)) break;
s += rb_enc_codelen(cc, enc);
}
if (s > RSTRING_PTR(str)) {
STR_SET_LEN(str, t-s);
memmove(RSTRING_PTR(str), s, RSTRING_LEN(str));
RSTRING_PTR(str)[RSTRING_LEN(str)] = '\0';
return str;
}
return Qnil;
}
/*
* call-seq:
* str.lstrip => new_str
*
* Returns a copy of <i>str</i> with leading whitespace removed. See also
* <code>String#rstrip</code> and <code>String#strip</code>.
*
* " hello ".lstrip #=> "hello "
* "hello".lstrip #=> "hello"
*/
static VALUE
rb_str_lstrip(VALUE str)
{
str = rb_str_dup(str);
rb_str_lstrip_bang(str);
return str;
}
/*
* call-seq:
* str.rstrip! => self or nil
*
* Removes trailing whitespace from <i>str</i>, returning <code>nil</code> if
* no change was made. See also <code>String#lstrip!</code> and
* <code>String#strip!</code>.
*
* " hello ".rstrip #=> " hello"
* "hello".rstrip! #=> nil
*/
static VALUE
rb_str_rstrip_bang(VALUE str)
{
rb_encoding *enc;
char *s, *t, *e;
enc = STR_ENC_GET(str);
rb_str_check_dummy_enc(enc);
s = RSTRING_PTR(str);
if (!s || RSTRING_LEN(str) == 0) return Qnil;
t = e = RSTRING_END(str);
/* remove trailing spaces or '\0's */
if (single_byte_optimizable(str)) {
while (s < t && (*(t-1) == '\0' || rb_enc_isspace(*(t-1), enc))) t--;
}
else {
char *tp;
while ((tp = rb_enc_prev_char(s, t, e, enc)) != NULL) {
unsigned int c = rb_enc_codepoint(tp, e, enc);
if (c && !rb_enc_isspace(c, enc)) break;
t = tp;
}
}
if (t < e) {
int len = t-RSTRING_PTR(str);
str_modify_keep_cr(str);
STR_SET_LEN(str, len);
RSTRING_PTR(str)[len] = '\0';
return str;
}
return Qnil;
}
/*
* call-seq:
* str.rstrip => new_str
*
* Returns a copy of <i>str</i> with trailing whitespace removed. See also
* <code>String#lstrip</code> and <code>String#strip</code>.
*
* " hello ".rstrip #=> " hello"
* "hello".rstrip #=> "hello"
*/
static VALUE
rb_str_rstrip(VALUE str)
{
str = rb_str_dup(str);
rb_str_rstrip_bang(str);
return str;
}
/*
* call-seq:
* str.strip! => str or nil
*
* Removes leading and trailing whitespace from <i>str</i>. Returns
* <code>nil</code> if <i>str</i> was not altered.
*/
static VALUE
rb_str_strip_bang(VALUE str)
{
VALUE l = rb_str_lstrip_bang(str);
VALUE r = rb_str_rstrip_bang(str);
if (NIL_P(l) && NIL_P(r)) return Qnil;
return str;
}
/*
* call-seq:
* str.strip => new_str
*
* Returns a copy of <i>str</i> with leading and trailing whitespace removed.
*
* " hello ".strip #=> "hello"
* "\tgoodbye\r\n".strip #=> "goodbye"
*/
static VALUE
rb_str_strip(VALUE str)
{
str = rb_str_dup(str);
rb_str_strip_bang(str);
return str;
}
static VALUE
scan_once(VALUE str, VALUE pat, long *start)
{
VALUE result, match;
struct re_registers *regs;
long i;
if (rb_reg_search(pat, str, *start, 0) >= 0) {
match = rb_backref_get();
regs = RMATCH_REGS(match);
if (BEG(0) == END(0)) {
rb_encoding *enc = STR_ENC_GET(str);
/*
* Always consume at least one character of the input string
*/
if (RSTRING_LEN(str) > END(0))
*start = END(0)+rb_enc_mbclen(RSTRING_PTR(str)+END(0),
RSTRING_END(str), enc);
else
*start = END(0)+1;
}
else {
*start = END(0);
}
if (regs->num_regs == 1) {
return rb_reg_nth_match(0, match);
}
result = rb_ary_new2(regs->num_regs);
for (i=1; i < regs->num_regs; i++) {
rb_ary_push(result, rb_reg_nth_match(i, match));
}
return result;
}
return Qnil;
}
/*
* call-seq:
* str.scan(pattern) => array
* str.scan(pattern) {|match, ...| block } => str
*
* Both forms iterate through <i>str</i>, matching the pattern (which may be a
* <code>Regexp</code> or a <code>String</code>). For each match, a result is
* generated and either added to the result array or passed to the block. If
* the pattern contains no groups, each individual result consists of the
* matched string, <code>$&</code>. If the pattern contains groups, each
* individual result is itself an array containing one entry per group.
*
* a = "cruel world"
* a.scan(/\w+/) #=> ["cruel", "world"]
* a.scan(/.../) #=> ["cru", "el ", "wor"]
* a.scan(/(...)/) #=> [["cru"], ["el "], ["wor"]]
* a.scan(/(..)(..)/) #=> [["cr", "ue"], ["l ", "wo"]]
*
* And the block form:
*
* a.scan(/\w+/) {|w| print "<<#{w}>> " }
* print "\n"
* a.scan(/(.)(.)/) {|x,y| print y, x }
* print "\n"
*
* <em>produces:</em>
*
* <<cruel>> <<world>>
* rceu lowlr
*/
static VALUE
rb_str_scan(VALUE str, VALUE pat)
{
VALUE result;
long start = 0;
long last = -1, prev = 0;
char *p = RSTRING_PTR(str); long len = RSTRING_LEN(str);
pat = get_pat(pat, 1);
if (!rb_block_given_p()) {
VALUE ary = rb_ary_new();
while (!NIL_P(result = scan_once(str, pat, &start))) {
last = prev;
prev = start;
rb_ary_push(ary, result);
}
if (last >= 0) rb_reg_search(pat, str, last, 0);
return ary;
}
while (!NIL_P(result = scan_once(str, pat, &start))) {
last = prev;
prev = start;
rb_yield(result);
str_mod_check(str, p, len);
}
if (last >= 0) rb_reg_search(pat, str, last, 0);
return str;
}
/*
* call-seq:
* str.hex => integer
*
* Treats leading characters from <i>str</i> as a string of hexadecimal digits
* (with an optional sign and an optional <code>0x</code>) and returns the
* corresponding number. Zero is returned on error.
*
* "0x0a".hex #=> 10
* "-1234".hex #=> -4660
* "0".hex #=> 0
* "wombat".hex #=> 0
*/
static VALUE
rb_str_hex(VALUE str)
{
rb_encoding *enc = rb_enc_get(str);
if (!rb_enc_asciicompat(enc)) {
rb_raise(rb_eEncCompatError, "ASCII incompatible encoding: %s", rb_enc_name(enc));
}
return rb_str_to_inum(str, 16, Qfalse);
}
/*
* call-seq:
* str.oct => integer
*
* Treats leading characters of <i>str</i> as a string of octal digits (with an
* optional sign) and returns the corresponding number. Returns 0 if the
* conversion fails.
*
* "123".oct #=> 83
* "-377".oct #=> -255
* "bad".oct #=> 0
* "0377bad".oct #=> 255
*/
static VALUE
rb_str_oct(VALUE str)
{
rb_encoding *enc = rb_enc_get(str);
if (!rb_enc_asciicompat(enc)) {
rb_raise(rb_eEncCompatError, "ASCII incompatible encoding: %s", rb_enc_name(enc));
}
return rb_str_to_inum(str, -8, Qfalse);
}
/*
* call-seq:
* str.crypt(other_str) => new_str
*
* Applies a one-way cryptographic hash to <i>str</i> by invoking the standard
* library function <code>crypt</code>. The argument is the salt string, which
* should be two characters long, each character drawn from
* <code>[a-zA-Z0-9./]</code>.
*/
static VALUE
rb_str_crypt(VALUE str, VALUE salt)
{
extern char *crypt(const char *, const char *);
VALUE result;
const char *s, *saltp;
#ifdef BROKEN_CRYPT
char salt_8bit_clean[3];
#endif
StringValue(salt);
if (RSTRING_LEN(salt) < 2)
rb_raise(rb_eArgError, "salt too short (need >=2 bytes)");
s = RSTRING_PTR(str);
if (!s) s = "";
saltp = RSTRING_PTR(salt);
#ifdef BROKEN_CRYPT
if (!ISASCII((unsigned char)saltp[0]) || !ISASCII((unsigned char)saltp[1])) {
salt_8bit_clean[0] = saltp[0] & 0x7f;
salt_8bit_clean[1] = saltp[1] & 0x7f;
salt_8bit_clean[2] = '\0';
saltp = salt_8bit_clean;
}
#endif
result = rb_str_new2(crypt(s, saltp));
OBJ_INFECT(result, str);
OBJ_INFECT(result, salt);
return result;
}
/*
* call-seq:
* str.intern => symbol
* str.to_sym => symbol
*
* Returns the <code>Symbol</code> corresponding to <i>str</i>, creating the
* symbol if it did not previously exist. See <code>Symbol#id2name</code>.
*
* "Koala".intern #=> :Koala
* s = 'cat'.to_sym #=> :cat
* s == :cat #=> true
* s = '@cat'.to_sym #=> :@cat
* s == :@cat #=> true
*
* This can also be used to create symbols that cannot be represented using the
* <code>:xxx</code> notation.
*
* 'cat and dog'.to_sym #=> :"cat and dog"
*/
VALUE
rb_str_intern(VALUE s)
{
VALUE str = RB_GC_GUARD(s);
VALUE sym;
ID id, id2;
id = rb_intern_str(str);
sym = ID2SYM(id);
id2 = SYM2ID(sym);
if (id != id2) {
const char *name = rb_id2name(id2);
if (name) {
rb_raise(rb_eRuntimeError, "symbol table overflow (%s given for %s)",
name, RSTRING_PTR(str));
}
else {
rb_raise(rb_eRuntimeError, "symbol table overflow (symbol %s)",
RSTRING_PTR(str));
}
}
return sym;
}
/*
* call-seq:
* str.ord => integer
*
* Return the <code>Integer</code> ordinal of a one-character string.
*
* "a".ord #=> 97
*/
VALUE
rb_str_ord(VALUE s)
{
unsigned int c;
c = rb_enc_codepoint(RSTRING_PTR(s), RSTRING_END(s), STR_ENC_GET(s));
return UINT2NUM(c);
}
/*
* call-seq:
* str.sum(n=16) => integer
*
* Returns a basic <em>n</em>-bit checksum of the characters in <i>str</i>,
* where <em>n</em> is the optional <code>Fixnum</code> parameter, defaulting
* to 16. The result is simply the sum of the binary value of each character in
* <i>str</i> modulo <code>2n - 1</code>. This is not a particularly good
* checksum.
*/
static VALUE
rb_str_sum(int argc, VALUE *argv, VALUE str)
{
VALUE vbits;
int bits;
char *ptr, *p, *pend;
long len;
if (argc == 0) {
bits = 16;
}
else {
rb_scan_args(argc, argv, "01", &vbits);
bits = NUM2INT(vbits);
}
ptr = p = RSTRING_PTR(str);
len = RSTRING_LEN(str);
pend = p + len;
if (bits >= sizeof(long)*CHAR_BIT) {
VALUE sum = INT2FIX(0);
while (p < pend) {
str_mod_check(str, ptr, len);
sum = rb_funcall(sum, '+', 1, INT2FIX((unsigned char)*p));
p++;
}
if (bits != 0) {
VALUE mod;
mod = rb_funcall(INT2FIX(1), rb_intern("<<"), 1, INT2FIX(bits));
mod = rb_funcall(mod, '-', 1, INT2FIX(1));
sum = rb_funcall(sum, '&', 1, mod);
}
return sum;
}
else {
unsigned long sum = 0;
while (p < pend) {
str_mod_check(str, ptr, len);
sum += (unsigned char)*p;
p++;
}
if (bits != 0) {
sum &= (((unsigned long)1)<<bits)-1;
}
return rb_int2inum(sum);
}
}
static VALUE
rb_str_justify(int argc, VALUE *argv, VALUE str, char jflag)
{
rb_encoding *enc;
VALUE w;
long width, len, flen = 1, fclen = 1;
VALUE res;
char *p;
const char *f = " ";
long n, llen, rlen;
volatile VALUE pad;
int singlebyte = 1, cr;
rb_scan_args(argc, argv, "11", &w, &pad);
enc = STR_ENC_GET(str);
width = NUM2LONG(w);
if (argc == 2) {
StringValue(pad);
enc = rb_enc_check(str, pad);
f = RSTRING_PTR(pad);
flen = RSTRING_LEN(pad);
fclen = str_strlen(pad, enc);
singlebyte = single_byte_optimizable(pad);
if (flen == 0 || fclen == 0) {
rb_raise(rb_eArgError, "zero width padding");
}
}
len = str_strlen(str, enc);
if (width < 0 || len >= width) return rb_str_dup(str);
n = width - len;
llen = (jflag == 'l') ? 0 : ((jflag == 'r') ? n : n/2);
rlen = n - llen;
cr = ENC_CODERANGE(str);
res = rb_str_new5(str, 0, RSTRING_LEN(str)+n*flen/fclen+2);
p = RSTRING_PTR(res);
while (llen) {
if (flen <= 1) {
*p++ = *f;
llen--;
}
else if (llen > fclen) {
memcpy(p,f,flen);
p += flen;
llen -= fclen;
}
else {
char *fp = str_nth(f, f+flen, llen, enc, singlebyte);
n = fp - f;
memcpy(p,f,n);
p+=n;
break;
}
}
memcpy(p, RSTRING_PTR(str), RSTRING_LEN(str));
p+=RSTRING_LEN(str);
while (rlen) {
if (flen <= 1) {
*p++ = *f;
rlen--;
}
else if (rlen > fclen) {
memcpy(p,f,flen);
p += flen;
rlen -= fclen;
}
else {
char *fp = str_nth(f, f+flen, rlen, enc, singlebyte);
n = fp - f;
memcpy(p,f,n);
p+=n;
break;
}
}
*p = '\0';
STR_SET_LEN(res, p-RSTRING_PTR(res));
OBJ_INFECT(res, str);
if (!NIL_P(pad)) OBJ_INFECT(res, pad);
rb_enc_associate(res, enc);
if (argc == 2)
cr = ENC_CODERANGE_AND(cr, ENC_CODERANGE(pad));
if (cr != ENC_CODERANGE_BROKEN)
ENC_CODERANGE_SET(res, cr);
return res;
}
/*
* call-seq:
* str.ljust(integer, padstr=' ') => new_str
*
* If <i>integer</i> is greater than the length of <i>str</i>, returns a new
* <code>String</code> of length <i>integer</i> with <i>str</i> left justified
* and padded with <i>padstr</i>; otherwise, returns <i>str</i>.
*
* "hello".ljust(4) #=> "hello"
* "hello".ljust(20) #=> "hello "
* "hello".ljust(20, '1234') #=> "hello123412341234123"
*/
static VALUE
rb_str_ljust(int argc, VALUE *argv, VALUE str)
{
return rb_str_justify(argc, argv, str, 'l');
}
/*
* call-seq:
* str.rjust(integer, padstr=' ') => new_str
*
* If <i>integer</i> is greater than the length of <i>str</i>, returns a new
* <code>String</code> of length <i>integer</i> with <i>str</i> right justified
* and padded with <i>padstr</i>; otherwise, returns <i>str</i>.
*
* "hello".rjust(4) #=> "hello"
* "hello".rjust(20) #=> " hello"
* "hello".rjust(20, '1234') #=> "123412341234123hello"
*/
static VALUE
rb_str_rjust(int argc, VALUE *argv, VALUE str)
{
return rb_str_justify(argc, argv, str, 'r');
}
/*
* call-seq:
* str.center(integer, padstr) => new_str
*
* If <i>integer</i> is greater than the length of <i>str</i>, returns a new
* <code>String</code> of length <i>integer</i> with <i>str</i> centered and
* padded with <i>padstr</i>; otherwise, returns <i>str</i>.
*
* "hello".center(4) #=> "hello"
* "hello".center(20) #=> " hello "
* "hello".center(20, '123') #=> "1231231hello12312312"
*/
static VALUE
rb_str_center(int argc, VALUE *argv, VALUE str)
{
return rb_str_justify(argc, argv, str, 'c');
}
/*
* call-seq:
* str.partition(sep) => [head, sep, tail]
*
* Searches the string for <i>sep</i> and returns the part before
* it, the <i>sep</i>, and the part after it. If <i>sep</i> is not found,
* returns <i>str</i> and two empty strings.
*
* "hello".partition("l") #=> ["he", "l", "lo"]
* "hello".partition("x") #=> ["hello", "", ""]
*/
static VALUE
rb_str_partition(VALUE str, VALUE sep)
{
long pos;
int regex = Qfalse;
if (TYPE(sep) == T_REGEXP) {
pos = rb_reg_search(sep, str, 0, 0);
regex = Qtrue;
}
else {
VALUE tmp;
tmp = rb_check_string_type(sep);
if (NIL_P(tmp)) {
rb_raise(rb_eTypeError, "type mismatch: %s given",
rb_obj_classname(sep));
}
pos = rb_str_index(str, sep, 0);
}
if (pos < 0) {
failed:
return rb_ary_new3(3, str, rb_str_new(0,0),rb_str_new(0,0));
}
if (regex) {
sep = rb_str_subpat(str, sep, 0);
if (pos == 0 && RSTRING_LEN(sep) == 0) goto failed;
}
return rb_ary_new3(3, rb_str_subseq(str, 0, pos),
sep,
rb_str_subseq(str, pos+RSTRING_LEN(sep),
RSTRING_LEN(str)-pos-RSTRING_LEN(sep)));
}
/*
* call-seq:
* str.rpartition(sep) => [head, sep, tail]
*
* Searches <i>sep</i> in the string from the end of the string, and
* returns the part before it, the <i>sep</i>, and the part after it.
* If <i>sep</i> is not found, returns two empty strings and
* <i>str</i>.
*
* "hello".rpartition("l") #=> ["hel", "l", "o"]
* "hello".rpartition("x") #=> ["", "", "hello"]
*/
static VALUE
rb_str_rpartition(VALUE str, VALUE sep)
{
long pos = RSTRING_LEN(str);
int regex = Qfalse;
if (TYPE(sep) == T_REGEXP) {
pos = rb_reg_search(sep, str, pos, 1);
regex = Qtrue;
}
else {
VALUE tmp;
tmp = rb_check_string_type(sep);
if (NIL_P(tmp)) {
rb_raise(rb_eTypeError, "type mismatch: %s given",
rb_obj_classname(sep));
}
pos = rb_str_sublen(str, pos);
pos = rb_str_rindex(str, sep, pos);
}
if (pos < 0) {
return rb_ary_new3(3, rb_str_new(0,0),rb_str_new(0,0), str);
}
if (regex) {
sep = rb_reg_nth_match(0, rb_backref_get());
}
return rb_ary_new3(3, rb_str_substr(str, 0, pos),
sep,
rb_str_substr(str,pos+str_strlen(sep,STR_ENC_GET(sep)),RSTRING_LEN(str)));
}
/*
* call-seq:
* str.start_with?([prefix]+) => true or false
*
* Returns true if <i>str</i> starts with the prefix given.
*/
static VALUE
rb_str_start_with(int argc, VALUE *argv, VALUE str)
{
int i;
for (i=0; i<argc; i++) {
VALUE tmp = rb_check_string_type(argv[i]);
if (NIL_P(tmp)) continue;
rb_enc_check(str, tmp);
if (RSTRING_LEN(str) < RSTRING_LEN(tmp)) continue;
if (memcmp(RSTRING_PTR(str), RSTRING_PTR(tmp), RSTRING_LEN(tmp)) == 0)
return Qtrue;
}
return Qfalse;
}
/*
* call-seq:
* str.end_with?([suffix]+) => true or false
*
* Returns true if <i>str</i> ends with the suffix given.
*/
static VALUE
rb_str_end_with(int argc, VALUE *argv, VALUE str)
{
int i;
char *p, *s, *e;
rb_encoding *enc;
for (i=0; i<argc; i++) {
VALUE tmp = rb_check_string_type(argv[i]);
if (NIL_P(tmp)) continue;
enc = rb_enc_check(str, tmp);
if (RSTRING_LEN(str) < RSTRING_LEN(tmp)) continue;
p = RSTRING_PTR(str);
e = p + RSTRING_LEN(str);
s = e - RSTRING_LEN(tmp);
if (rb_enc_left_char_head(p, s, e, enc) != s)
continue;
if (memcmp(s, RSTRING_PTR(tmp), RSTRING_LEN(tmp)) == 0)
return Qtrue;
}
return Qfalse;
}
void
rb_str_setter(VALUE val, ID id, VALUE *var)
{
if (!NIL_P(val) && TYPE(val) != T_STRING) {
rb_raise(rb_eTypeError, "value of %s must be String", rb_id2name(id));
}
*var = val;
}
/*
* call-seq:
* str.force_encoding(encoding) => str
*
* Changes the encoding to +encoding+ and returns self.
*/
static VALUE
rb_str_force_encoding(VALUE str, VALUE enc)
{
str_modifiable(str);
rb_enc_associate(str, rb_to_encoding(enc));
ENC_CODERANGE_CLEAR(str);
return str;
}
/*
* call-seq:
* str.valid_encoding? => true or false
*
* Returns true for a string which encoded correctly.
*
* "\xc2\xa1".force_encoding("UTF-8").valid_encoding? => true
* "\xc2".force_encoding("UTF-8").valid_encoding? => false
* "\x80".force_encoding("UTF-8").valid_encoding? => false
*/
static VALUE
rb_str_valid_encoding_p(VALUE str)
{
int cr = rb_enc_str_coderange(str);
return cr == ENC_CODERANGE_BROKEN ? Qfalse : Qtrue;
}
/*
* call-seq:
* str.ascii_only? => true or false
*
* Returns true for a string which has only ASCII characters.
*
* "abc".force_encoding("UTF-8").ascii_only? => true
* "abc\u{6666}".force_encoding("UTF-8").ascii_only? => false
*/
static VALUE
rb_str_is_ascii_only_p(VALUE str)
{
int cr = rb_enc_str_coderange(str);
return cr == ENC_CODERANGE_7BIT ? Qtrue : Qfalse;
}
/**********************************************************************
* Document-class: Symbol
*
* <code>Symbol</code> objects represent names and some strings
* inside the Ruby
* interpreter. They are generated using the <code>:name</code> and
* <code>:"string"</code> literals
* syntax, and by the various <code>to_sym</code> methods. The same
* <code>Symbol</code> object will be created for a given name or string
* for the duration of a program's execution, regardless of the context
* or meaning of that name. Thus if <code>Fred</code> is a constant in
* one context, a method in another, and a class in a third, the
* <code>Symbol</code> <code>:Fred</code> will be the same object in
* all three contexts.
*
* module One
* class Fred
* end
* $f1 = :Fred
* end
* module Two
* Fred = 1
* $f2 = :Fred
* end
* def Fred()
* end
* $f3 = :Fred
* $f1.object_id #=> 2514190
* $f2.object_id #=> 2514190
* $f3.object_id #=> 2514190
*
*/
/*
* call-seq:
* sym == obj => true or false
*
* Equality---If <i>sym</i> and <i>obj</i> are exactly the same
* symbol, returns <code>true</code>.
*/
static VALUE
sym_equal(VALUE sym1, VALUE sym2)
{
if (sym1 == sym2) return Qtrue;
return Qfalse;
}
static int
sym_printable(const char *s, const char *send, rb_encoding *enc)
{
while (s < send) {
int c = rb_enc_codepoint(s, send, enc);
int n = rb_enc_codelen(c, enc);
if (!rb_enc_isprint(c, enc)) return Qfalse;
s += n;
}
return Qtrue;
}
/*
* call-seq:
* sym.inspect => string
*
* Returns the representation of <i>sym</i> as a symbol literal.
*
* :fred.inspect #=> ":fred"
*/
static VALUE
sym_inspect(VALUE sym)
{
VALUE str;
ID id = SYM2ID(sym);
rb_encoding *enc;
sym = rb_id2str(id);
enc = STR_ENC_GET(sym);
str = rb_enc_str_new(0, RSTRING_LEN(sym)+1, enc);
RSTRING_PTR(str)[0] = ':';
memcpy(RSTRING_PTR(str)+1, RSTRING_PTR(sym), RSTRING_LEN(sym));
if (RSTRING_LEN(sym) != strlen(RSTRING_PTR(sym)) ||
!rb_enc_symname_p(RSTRING_PTR(sym), enc) ||
!sym_printable(RSTRING_PTR(sym), RSTRING_END(sym), enc)) {
str = rb_str_inspect(str);
strncpy(RSTRING_PTR(str), ":\"", 2);
}
return str;
}
/*
* call-seq:
* sym.id2name => string
* sym.to_s => string
*
* Returns the name or string corresponding to <i>sym</i>.
*
* :fred.id2name #=> "fred"
*/
VALUE
rb_sym_to_s(VALUE sym)
{
ID id = SYM2ID(sym);
return str_new3(rb_cString, rb_id2str(id));
}
/*
* call-seq:
* sym.to_sym => sym
* sym.intern => sym
*
* In general, <code>to_sym</code> returns the <code>Symbol</code> corresponding
* to an object. As <i>sym</i> is already a symbol, <code>self</code> is returned
* in this case.
*/
static VALUE
sym_to_sym(VALUE sym)
{
return sym;
}
static VALUE
sym_call(VALUE args, VALUE sym, int argc, VALUE *argv)
{
VALUE obj;
if (argc < 1) {
rb_raise(rb_eArgError, "no receiver given");
}
obj = argv[0];
return rb_funcall3(obj, (ID)sym, argc - 1, argv + 1);
}
/*
* call-seq:
* sym.to_proc
*
* Returns a _Proc_ object which respond to the given method by _sym_.
*
* (1..3).collect(&:to_s) #=> ["1", "2", "3"]
*/
static VALUE
sym_to_proc(VALUE sym)
{
static VALUE sym_proc_cache = Qfalse;
enum {SYM_PROC_CACHE_SIZE = 67};
VALUE proc;
long id, index;
VALUE *aryp;
if (!sym_proc_cache) {
sym_proc_cache = rb_ary_tmp_new(SYM_PROC_CACHE_SIZE * 2);
rb_gc_register_mark_object(sym_proc_cache);
rb_ary_store(sym_proc_cache, SYM_PROC_CACHE_SIZE*2 - 1, Qnil);
}
id = SYM2ID(sym);
index = (id % SYM_PROC_CACHE_SIZE) << 1;
aryp = RARRAY_PTR(sym_proc_cache);
if (aryp[index] == sym) {
return aryp[index + 1];
}
else {
proc = rb_proc_new(sym_call, (VALUE)id);
aryp[index] = sym;
aryp[index + 1] = proc;
return proc;
}
}
static VALUE
sym_succ(VALUE sym)
{
return rb_str_intern(rb_str_succ(rb_sym_to_s(sym)));
}
static VALUE
sym_cmp(VALUE sym, VALUE other)
{
if (!SYMBOL_P(other)) {
return Qnil;
}
return rb_str_cmp_m(rb_sym_to_s(sym), rb_sym_to_s(other));
}
static VALUE
sym_casecmp(VALUE sym, VALUE other)
{
if (!SYMBOL_P(other)) {
return Qnil;
}
return rb_str_casecmp(rb_sym_to_s(sym), rb_sym_to_s(other));
}
static VALUE
sym_match(VALUE sym, VALUE other)
{
return rb_str_match(rb_sym_to_s(sym), other);
}
static VALUE
sym_aref(int argc, VALUE *argv, VALUE sym)
{
return rb_str_aref_m(argc, argv, rb_sym_to_s(sym));
}
static VALUE
sym_length(VALUE sym)
{
return rb_str_length(rb_id2str(SYM2ID(sym)));
}
static VALUE
sym_empty(VALUE sym)
{
return rb_str_empty(rb_id2str(SYM2ID(sym)));
}
static VALUE
sym_upcase(VALUE sym)
{
return rb_str_intern(rb_str_upcase(rb_id2str(SYM2ID(sym))));
}
static VALUE
sym_downcase(VALUE sym)
{
return rb_str_intern(rb_str_downcase(rb_id2str(SYM2ID(sym))));
}
static VALUE
sym_capitalize(VALUE sym)
{
return rb_str_intern(rb_str_capitalize(rb_id2str(SYM2ID(sym))));
}
static VALUE
sym_swapcase(VALUE sym)
{
return rb_str_intern(rb_str_swapcase(rb_id2str(SYM2ID(sym))));
}
static VALUE
sym_encoding(VALUE sym)
{
return rb_obj_encoding(rb_id2str(SYM2ID(sym)));
}
ID
rb_to_id(VALUE name)
{
VALUE tmp;
ID id;
switch (TYPE(name)) {
default:
tmp = rb_check_string_type(name);
if (NIL_P(tmp)) {
tmp = rb_inspect(name);
rb_raise(rb_eTypeError, "%s is not a symbol",
RSTRING_PTR(tmp));
}
name = tmp;
/* fall through */
case T_STRING:
name = rb_str_intern(name);
/* fall through */
case T_SYMBOL:
return SYM2ID(name);
}
return id;
}
/*
* A <code>String</code> object holds and manipulates an arbitrary sequence of
* bytes, typically representing characters. String objects may be created
* using <code>String::new</code> or as literals.
*
* Because of aliasing issues, users of strings should be aware of the methods
* that modify the contents of a <code>String</code> object. Typically,
* methods with names ending in ``!'' modify their receiver, while those
* without a ``!'' return a new <code>String</code>. However, there are
* exceptions, such as <code>String#[]=</code>.
*
*/
void
Init_String(void)
{
#undef rb_intern
#define rb_intern(str) rb_intern_const(str)
rb_cString = rb_define_class("String", rb_cObject);
rb_include_module(rb_cString, rb_mComparable);
rb_define_alloc_func(rb_cString, str_alloc);
rb_define_singleton_method(rb_cString, "try_convert", rb_str_s_try_convert, 1);
rb_define_method(rb_cString, "initialize", rb_str_init, -1);
rb_define_method(rb_cString, "initialize_copy", rb_str_replace, 1);
rb_define_method(rb_cString, "<=>", rb_str_cmp_m, 1);
rb_define_method(rb_cString, "==", rb_str_equal, 1);
rb_define_method(rb_cString, "eql?", rb_str_eql, 1);
rb_define_method(rb_cString, "hash", rb_str_hash_m, 0);
rb_define_method(rb_cString, "casecmp", rb_str_casecmp, 1);
rb_define_method(rb_cString, "+", rb_str_plus, 1);
rb_define_method(rb_cString, "*", rb_str_times, 1);
rb_define_method(rb_cString, "%", rb_str_format_m, 1);
rb_define_method(rb_cString, "[]", rb_str_aref_m, -1);
rb_define_method(rb_cString, "[]=", rb_str_aset_m, -1);
rb_define_method(rb_cString, "insert", rb_str_insert, 2);
rb_define_method(rb_cString, "length", rb_str_length, 0);
rb_define_method(rb_cString, "size", rb_str_length, 0);
rb_define_method(rb_cString, "bytesize", rb_str_bytesize, 0);
rb_define_method(rb_cString, "empty?", rb_str_empty, 0);
rb_define_method(rb_cString, "=~", rb_str_match, 1);
rb_define_method(rb_cString, "match", rb_str_match_m, -1);
rb_define_method(rb_cString, "succ", rb_str_succ, 0);
rb_define_method(rb_cString, "succ!", rb_str_succ_bang, 0);
rb_define_method(rb_cString, "next", rb_str_succ, 0);
rb_define_method(rb_cString, "next!", rb_str_succ_bang, 0);
rb_define_method(rb_cString, "upto", rb_str_upto, -1);
rb_define_method(rb_cString, "index", rb_str_index_m, -1);
rb_define_method(rb_cString, "rindex", rb_str_rindex_m, -1);
rb_define_method(rb_cString, "replace", rb_str_replace, 1);
rb_define_method(rb_cString, "clear", rb_str_clear, 0);
rb_define_method(rb_cString, "chr", rb_str_chr, 0);
rb_define_method(rb_cString, "getbyte", rb_str_getbyte, 1);
rb_define_method(rb_cString, "setbyte", rb_str_setbyte, 2);
rb_define_method(rb_cString, "to_i", rb_str_to_i, -1);
rb_define_method(rb_cString, "to_f", rb_str_to_f, 0);
rb_define_method(rb_cString, "to_s", rb_str_to_s, 0);
rb_define_method(rb_cString, "to_str", rb_str_to_s, 0);
rb_define_method(rb_cString, "inspect", rb_str_inspect, 0);
rb_define_method(rb_cString, "dump", rb_str_dump, 0);
rb_define_method(rb_cString, "upcase", rb_str_upcase, 0);
rb_define_method(rb_cString, "downcase", rb_str_downcase, 0);
rb_define_method(rb_cString, "capitalize", rb_str_capitalize, 0);
rb_define_method(rb_cString, "swapcase", rb_str_swapcase, 0);
rb_define_method(rb_cString, "upcase!", rb_str_upcase_bang, 0);
rb_define_method(rb_cString, "downcase!", rb_str_downcase_bang, 0);
rb_define_method(rb_cString, "capitalize!", rb_str_capitalize_bang, 0);
rb_define_method(rb_cString, "swapcase!", rb_str_swapcase_bang, 0);
rb_define_method(rb_cString, "hex", rb_str_hex, 0);
rb_define_method(rb_cString, "oct", rb_str_oct, 0);
rb_define_method(rb_cString, "split", rb_str_split_m, -1);
rb_define_method(rb_cString, "lines", rb_str_each_line, -1);
rb_define_method(rb_cString, "bytes", rb_str_each_byte, 0);
rb_define_method(rb_cString, "chars", rb_str_each_char, 0);
rb_define_method(rb_cString, "codepoints", rb_str_each_codepoint, 0);
rb_define_method(rb_cString, "reverse", rb_str_reverse, 0);
rb_define_method(rb_cString, "reverse!", rb_str_reverse_bang, 0);
rb_define_method(rb_cString, "concat", rb_str_concat, 1);
rb_define_method(rb_cString, "<<", rb_str_concat, 1);
rb_define_method(rb_cString, "crypt", rb_str_crypt, 1);
rb_define_method(rb_cString, "intern", rb_str_intern, 0);
rb_define_method(rb_cString, "to_sym", rb_str_intern, 0);
rb_define_method(rb_cString, "ord", rb_str_ord, 0);
rb_define_method(rb_cString, "include?", rb_str_include, 1);
rb_define_method(rb_cString, "start_with?", rb_str_start_with, -1);
rb_define_method(rb_cString, "end_with?", rb_str_end_with, -1);
rb_define_method(rb_cString, "scan", rb_str_scan, 1);
rb_define_method(rb_cString, "ljust", rb_str_ljust, -1);
rb_define_method(rb_cString, "rjust", rb_str_rjust, -1);
rb_define_method(rb_cString, "center", rb_str_center, -1);
rb_define_method(rb_cString, "sub", rb_str_sub, -1);
rb_define_method(rb_cString, "gsub", rb_str_gsub, -1);
rb_define_method(rb_cString, "chop", rb_str_chop, 0);
rb_define_method(rb_cString, "chomp", rb_str_chomp, -1);
rb_define_method(rb_cString, "strip", rb_str_strip, 0);
rb_define_method(rb_cString, "lstrip", rb_str_lstrip, 0);
rb_define_method(rb_cString, "rstrip", rb_str_rstrip, 0);
rb_define_method(rb_cString, "sub!", rb_str_sub_bang, -1);
rb_define_method(rb_cString, "gsub!", rb_str_gsub_bang, -1);
rb_define_method(rb_cString, "chop!", rb_str_chop_bang, 0);
rb_define_method(rb_cString, "chomp!", rb_str_chomp_bang, -1);
rb_define_method(rb_cString, "strip!", rb_str_strip_bang, 0);
rb_define_method(rb_cString, "lstrip!", rb_str_lstrip_bang, 0);
rb_define_method(rb_cString, "rstrip!", rb_str_rstrip_bang, 0);
rb_define_method(rb_cString, "tr", rb_str_tr, 2);
rb_define_method(rb_cString, "tr_s", rb_str_tr_s, 2);
rb_define_method(rb_cString, "delete", rb_str_delete, -1);
rb_define_method(rb_cString, "squeeze", rb_str_squeeze, -1);
rb_define_method(rb_cString, "count", rb_str_count, -1);
rb_define_method(rb_cString, "tr!", rb_str_tr_bang, 2);
rb_define_method(rb_cString, "tr_s!", rb_str_tr_s_bang, 2);
rb_define_method(rb_cString, "delete!", rb_str_delete_bang, -1);
rb_define_method(rb_cString, "squeeze!", rb_str_squeeze_bang, -1);
rb_define_method(rb_cString, "each_line", rb_str_each_line, -1);
rb_define_method(rb_cString, "each_byte", rb_str_each_byte, 0);
rb_define_method(rb_cString, "each_char", rb_str_each_char, 0);
rb_define_method(rb_cString, "each_codepoint", rb_str_each_codepoint, 0);
rb_define_method(rb_cString, "sum", rb_str_sum, -1);
rb_define_method(rb_cString, "slice", rb_str_aref_m, -1);
rb_define_method(rb_cString, "slice!", rb_str_slice_bang, -1);
rb_define_method(rb_cString, "partition", rb_str_partition, 1);
rb_define_method(rb_cString, "rpartition", rb_str_rpartition, 1);
rb_define_method(rb_cString, "encoding", rb_obj_encoding, 0); /* in encoding.c */
rb_define_method(rb_cString, "force_encoding", rb_str_force_encoding, 1);
rb_define_method(rb_cString, "valid_encoding?", rb_str_valid_encoding_p, 0);
rb_define_method(rb_cString, "ascii_only?", rb_str_is_ascii_only_p, 0);
id_to_s = rb_intern("to_s");
rb_fs = Qnil;
rb_define_variable("$;", &rb_fs);
rb_define_variable("$-F", &rb_fs);
rb_cSymbol = rb_define_class("Symbol", rb_cObject);
rb_include_module(rb_cSymbol, rb_mComparable);
rb_undef_alloc_func(rb_cSymbol);
rb_undef_method(CLASS_OF(rb_cSymbol), "new");
rb_define_singleton_method(rb_cSymbol, "all_symbols", rb_sym_all_symbols, 0); /* in parse.y */
rb_define_method(rb_cSymbol, "==", sym_equal, 1);
rb_define_method(rb_cSymbol, "inspect", sym_inspect, 0);
rb_define_method(rb_cSymbol, "to_s", rb_sym_to_s, 0);
rb_define_method(rb_cSymbol, "id2name", rb_sym_to_s, 0);
rb_define_method(rb_cSymbol, "intern", sym_to_sym, 0);
rb_define_method(rb_cSymbol, "to_sym", sym_to_sym, 0);
rb_define_method(rb_cSymbol, "to_proc", sym_to_proc, 0);
rb_define_method(rb_cSymbol, "succ", sym_succ, 0);
rb_define_method(rb_cSymbol, "next", sym_succ, 0);
rb_define_method(rb_cSymbol, "<=>", sym_cmp, 1);
rb_define_method(rb_cSymbol, "casecmp", sym_casecmp, 1);
rb_define_method(rb_cSymbol, "=~", sym_match, 1);
rb_define_method(rb_cSymbol, "[]", sym_aref, -1);
rb_define_method(rb_cSymbol, "slice", sym_aref, -1);
rb_define_method(rb_cSymbol, "length", sym_length, 0);
rb_define_method(rb_cSymbol, "size", sym_length, 0);
rb_define_method(rb_cSymbol, "empty?", sym_empty, 0);
rb_define_method(rb_cSymbol, "match", sym_match, 1);
rb_define_method(rb_cSymbol, "upcase", sym_upcase, 0);
rb_define_method(rb_cSymbol, "downcase", sym_downcase, 0);
rb_define_method(rb_cSymbol, "capitalize", sym_capitalize, 0);
rb_define_method(rb_cSymbol, "swapcase", sym_swapcase, 0);
rb_define_method(rb_cSymbol, "encoding", sym_encoding, 0);
}
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