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ruby/string.c

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/**********************************************************************
string.c -
$Author$
$Date$
created at: Mon Aug 9 17:12:58 JST 1993
Copyright (C) 1993-2001 Yukihiro Matsumoto
Copyright (C) 2000 Network Applied Communication Laboratory, Inc.
Copyright (C) 2000 Information-technology Promotion Agency, Japan
**********************************************************************/
#include "ruby.h"
#include "re.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
VALUE rb_cString;
#define STR_NO_ORIG FL_USER2
#define STR_ASSOC FL_USER3
VALUE rb_fs;
VALUE
rb_str_new(ptr, len)
const char *ptr;
long len;
{
NEWOBJ(str, struct RString);
OBJSETUP(str, rb_cString, T_STRING);
str->ptr = 0;
str->len = len;
str->orig = 0;
str->ptr = ALLOC_N(char,len+1);
if (ptr) {
memcpy(str->ptr, ptr, len);
}
str->ptr[len] = '\0';
return (VALUE)str;
}
VALUE
rb_str_new2(ptr)
const char *ptr;
{
return rb_str_new(ptr, strlen(ptr));
}
VALUE
rb_tainted_str_new(ptr, len)
const char *ptr;
long len;
{
VALUE str = rb_str_new(ptr, len);
OBJ_TAINT(str);
return str;
}
VALUE
rb_tainted_str_new2(ptr)
const char *ptr;
{
VALUE str = rb_str_new2(ptr);
OBJ_TAINT(str);
return str;
}
VALUE
rb_str_new3(str)
VALUE str;
{
NEWOBJ(str2, struct RString);
OBJSETUP(str2, rb_cString, T_STRING);
str2->len = RSTRING(str)->len;
str2->ptr = RSTRING(str)->ptr;
str2->orig = str;
OBJ_INFECT(str2, str);
return (VALUE)str2;
}
VALUE
rb_str_new4(orig)
VALUE orig;
{
VALUE klass;
klass = CLASS_OF(orig);
while (TYPE(klass) == T_ICLASS || FL_TEST(klass, FL_SINGLETON)) {
klass = (VALUE)RCLASS(klass)->super;
}
if (RSTRING(orig)->orig) {
VALUE str;
if (FL_TEST(orig, STR_NO_ORIG)) {
str = rb_str_new(RSTRING(orig)->ptr, RSTRING(orig)->len);
}
else {
str = rb_str_new3(RSTRING(orig)->orig);
}
OBJ_FREEZE(str);
RBASIC(str)->klass = klass;
return str;
}
else {
NEWOBJ(str, struct RString);
OBJSETUP(str, klass, T_STRING);
str->len = RSTRING(orig)->len;
str->ptr = RSTRING(orig)->ptr;
RSTRING(orig)->orig = (VALUE)str;
str->orig = 0;
OBJ_INFECT(str, orig);
OBJ_FREEZE(str);
return (VALUE)str;
}
}
#define STR_BUF_MIN_SIZE 128
VALUE
rb_str_buf_new(capa)
long capa;
{
NEWOBJ(str, struct RString);
OBJSETUP(str, rb_cString, T_STRING);
FL_SET(str, STR_NO_ORIG);
if (capa < STR_BUF_MIN_SIZE)
capa = STR_BUF_MIN_SIZE;
str->ptr = 0;
str->len = 0;
str->orig = LONG2FIX(capa);
str->ptr = ALLOC_N(char, capa+1);
str->ptr[0] = '\0';
return (VALUE)str;
}
VALUE
rb_str_buf_new2(ptr)
const char *ptr;
{
VALUE str;
long len = strlen(ptr);
str = rb_str_buf_new(len + STR_BUF_MIN_SIZE);
rb_str_cat(str, ptr, len);
return str;
}
VALUE
rb_str_to_str(str)
VALUE str;
{
return rb_convert_type(str, T_STRING, "String", "to_str");
}
VALUE
rb_string_value(ptr)
volatile VALUE *ptr;
{
return *ptr = rb_str_to_str(*ptr);
}
static void
rb_str_become(str, str2)
VALUE str, str2;
{
if (str == str2) return;
if (NIL_P(str2)) {
RSTRING(str)->ptr = 0;
RSTRING(str)->len = 0;
RSTRING(str)->orig = 0;
return;
}
if ((!RSTRING(str)->orig||FL_TEST(str,STR_NO_ORIG))&&RSTRING(str)->ptr)
free(RSTRING(str)->ptr);
RSTRING(str)->ptr = RSTRING(str2)->ptr;
RSTRING(str)->len = RSTRING(str2)->len;
RSTRING(str)->orig = RSTRING(str2)->orig;
RSTRING(str2)->ptr = 0; /* abandon str2 */
RSTRING(str2)->len = 0;
if (OBJ_TAINTED(str2)) OBJ_TAINT(str);
}
void
rb_str_associate(str, add)
VALUE str, add;
{
if (!FL_TEST(str, STR_NO_ORIG)) {
if (RSTRING(str)->orig) {
rb_str_modify(str);
}
RSTRING(str)->orig = rb_ary_new();
FL_SET(str, STR_NO_ORIG|STR_ASSOC);
}
rb_ary_push(RSTRING(str)->orig, add);
}
VALUE
rb_str_associated(str)
VALUE str;
{
if (!FL_TEST(str, STR_NO_ORIG|STR_ASSOC)) {
return Qfalse;
}
return RSTRING(str)->orig;
}
static ID id_to_s;
VALUE
rb_obj_as_string(obj)
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;
}
VALUE
rb_str_dup(str)
VALUE str;
{
VALUE str2;
VALUE klass;
StringValue(str);
klass = CLASS_OF(str);
while (TYPE(klass) == T_ICLASS || FL_TEST(klass, FL_SINGLETON)) {
klass = (VALUE)RCLASS(klass)->super;
}
if (OBJ_FROZEN(str)) str2 = rb_str_new3(str);
else if (FL_TEST(str, STR_NO_ORIG)) {
str2 = rb_str_new(RSTRING(str)->ptr, RSTRING(str)->len);
}
else if (RSTRING(str)->orig) {
str2 = rb_str_new3(RSTRING(str)->orig);
}
else {
str2 = rb_str_new3(rb_str_new4(str));
}
OBJ_INFECT(str2, str);
RBASIC(str2)->klass = klass;
return str2;
}
static VALUE
rb_str_clone(str)
VALUE str;
{
VALUE clone = rb_str_dup(str);
if (FL_TEST(str, STR_NO_ORIG))
RSTRING(clone)->orig = RSTRING(str)->orig;
CLONESETUP(clone, str);
return clone;
}
static VALUE
rb_str_s_new(argc, argv, klass)
int argc;
VALUE *argv;
VALUE klass;
{
VALUE str = rb_str_new(0, 0);
OBJSETUP(str, klass, T_STRING);
rb_obj_call_init(str, argc, argv);
return str;
}
static VALUE
rb_str_length(str)
VALUE str;
{
return INT2NUM(RSTRING(str)->len);
}
static VALUE
rb_str_empty(str)
VALUE str;
{
if (RSTRING(str)->len == 0)
return Qtrue;
return Qfalse;
}
VALUE
rb_str_plus(str1, str2)
VALUE str1, str2;
{
VALUE str3;
StringValue(str2);
str3 = rb_str_new(0, RSTRING(str1)->len+RSTRING(str2)->len);
memcpy(RSTRING(str3)->ptr, RSTRING(str1)->ptr, RSTRING(str1)->len);
memcpy(RSTRING(str3)->ptr + RSTRING(str1)->len,
RSTRING(str2)->ptr, RSTRING(str2)->len);
RSTRING(str3)->ptr[RSTRING(str3)->len] = '\0';
if (OBJ_TAINTED(str1) || OBJ_TAINTED(str2))
OBJ_TAINT(str3);
return str3;
}
VALUE
rb_str_times(str, times)
VALUE str;
VALUE times;
{
VALUE str2;
long i, len;
len = NUM2LONG(times);
if (len == 0) return rb_str_new(0,0);
if (len < 0) {
rb_raise(rb_eArgError, "negative argument");
}
if (LONG_MAX/len < RSTRING(str)->len) {
rb_raise(rb_eArgError, "argument too big");
}
str2 = rb_str_new(0, RSTRING(str)->len*len);
for (i=0; i<len; i++) {
memcpy(RSTRING(str2)->ptr+(i*RSTRING(str)->len),
RSTRING(str)->ptr, RSTRING(str)->len);
}
RSTRING(str2)->ptr[RSTRING(str2)->len] = '\0';
if (OBJ_TAINTED(str)) {
OBJ_TAINT(str2);
}
return str2;
}
static VALUE
rb_str_format(str, arg)
VALUE str, arg;
{
VALUE *argv;
if (TYPE(arg) == T_ARRAY) {
argv = ALLOCA_N(VALUE, RARRAY(arg)->len + 1);
argv[0] = str;
MEMCPY(argv+1, RARRAY(arg)->ptr, VALUE, RARRAY(arg)->len);
return rb_f_sprintf(RARRAY(arg)->len+1, argv);
}
argv = ALLOCA_N(VALUE, 2);
argv[0] = str;
argv[1] = arg;
return rb_f_sprintf(2, argv);
}
VALUE
rb_str_substr(str, beg, len)
VALUE str;
long beg, len;
{
VALUE str2;
if (len < 0) return Qnil;
if (beg > RSTRING(str)->len) return Qnil;
if (beg < 0) {
beg += RSTRING(str)->len;
if (beg < 0) return Qnil;
}
if (beg + len > RSTRING(str)->len) {
len = RSTRING(str)->len - beg;
}
if (len < 0) {
len = 0;
}
if (len == 0) return rb_str_new(0,0);
str2 = rb_str_new(RSTRING(str)->ptr+beg, len);
if (OBJ_TAINTED(str)) OBJ_TAINT(str2);
return str2;
}
static int
str_independent(str)
VALUE str;
{
if (OBJ_FROZEN(str)) rb_error_frozen("string");
if (!OBJ_TAINTED(str) && rb_safe_level() >= 4)
rb_raise(rb_eSecurityError, "Insecure: can't modify string");
if (!RSTRING(str)->orig || FL_TEST(str, STR_NO_ORIG)) return 1;
if (TYPE(RSTRING(str)->orig) != T_STRING) rb_bug("non string str->orig");
return 0;
}
void
rb_str_modify(str)
VALUE str;
{
char *ptr;
if (str_independent(str)) return;
ptr = ALLOC_N(char, RSTRING(str)->len+1);
if (RSTRING(str)->ptr) {
memcpy(ptr, RSTRING(str)->ptr, RSTRING(str)->len);
}
ptr[RSTRING(str)->len] = 0;
RSTRING(str)->ptr = ptr;
RSTRING(str)->orig = 0;
}
VALUE
rb_str_freeze(str)
VALUE str;
{
return rb_obj_freeze(str);
}
VALUE
rb_str_dup_frozen(str)
VALUE str;
{
if (RSTRING(str)->orig && !FL_TEST(str, STR_NO_ORIG)) {
OBJ_FREEZE(RSTRING(str)->orig);
return RSTRING(str)->orig;
}
if (OBJ_FROZEN(str)) return str;
str = rb_str_dup(str);
OBJ_FREEZE(str);
return str;
}
VALUE
rb_str_resize(str, len)
VALUE str;
long len;
{
if (len != RSTRING(str)->len) {
rb_str_modify(str);
if (len >= 0) {
if (RSTRING(str)->len < len || RSTRING(str)->len - len > 1024) {
REALLOC_N(RSTRING(str)->ptr, char, len + 1);
}
RSTRING(str)->len = len;
RSTRING(str)->ptr[len] = '\0'; /* sentinel */
}
}
return str;
}
VALUE
rb_str_buf_cat(str, ptr, len)
VALUE str;
const char *ptr;
long len;
{
long i, capa, total;
if (RSTRING(str)->orig == 0) {
capa = RSTRING(str)->len;
FL_SET(str, STR_NO_ORIG);
}
else {
capa = FIX2LONG(RSTRING(str)->orig);
}
total = RSTRING(str)->len+len;
if (capa <= total) {
while (total > capa) {
capa = (capa + 1) * 2;
}
REALLOC_N(RSTRING(str)->ptr, char, capa+1);
RSTRING(str)->orig = LONG2FIX(capa);
}
memcpy(RSTRING(str)->ptr + RSTRING(str)->len, ptr, len);
RSTRING(str)->len = total;
RSTRING(str)->ptr[total] = '\0'; /* sentinel */
return str;
}
VALUE
rb_str_buf_cat2(str, ptr)
VALUE str;
const char *ptr;
{
return rb_str_buf_cat(str, ptr, strlen(ptr));
}
VALUE
rb_str_cat(str, ptr, len)
VALUE str;
const char *ptr;
long len;
{
long i, capa;
rb_str_modify(str);
if (len > 0) {
if (RSTRING(str)->orig == 0 ||
(FL_TEST(str, STR_NO_ORIG) && !FL_TEST(str, STR_ASSOC))) {
return rb_str_buf_cat(str, ptr, len);
}
REALLOC_N(RSTRING(str)->ptr, char, RSTRING(str)->len+1);
if (ptr) {
memcpy(RSTRING(str)->ptr + RSTRING(str)->len, ptr, len);
}
else {
MEMZERO(RSTRING(str)->ptr + RSTRING(str)->len, char, len);
}
RSTRING(str)->len += len;
RSTRING(str)->ptr[RSTRING(str)->len] = '\0'; /* sentinel */
}
return str;
}
VALUE
rb_str_cat2(str, ptr)
VALUE str;
const char *ptr;
{
return rb_str_cat(str, ptr, strlen(ptr));
}
VALUE
rb_str_buf_append(str, str2)
VALUE str, str2;
{
long i, capa, len;
if (RSTRING(str)->orig == 0) {
capa = RSTRING(str)->len;
FL_SET(str, STR_NO_ORIG);
}
else {
capa = FIX2LONG(RSTRING(str)->orig);
}
len = RSTRING(str)->len+RSTRING(str2)->len;
if (capa <= len) {
while (len > capa) {
capa = (capa + 1) * 2;
}
REALLOC_N(RSTRING(str)->ptr, char, capa+1);
RSTRING(str)->orig = LONG2FIX(capa);
}
memcpy(RSTRING(str)->ptr + RSTRING(str)->len,
RSTRING(str2)->ptr, RSTRING(str2)->len);
RSTRING(str)->len += RSTRING(str2)->len;
RSTRING(str)->ptr[RSTRING(str)->len] = '\0'; /* sentinel */
return str;
}
VALUE
rb_str_append(str, str2)
VALUE str, str2;
{
long i, capa, len;
StringValue(str2);
rb_str_modify(str);
len = RSTRING(str)->len+RSTRING(str2)->len;
if (len > 0) {
if (RSTRING(str)->orig == 0 ||
(FL_TEST(str, STR_NO_ORIG) && !FL_TEST(str, STR_ASSOC))) {
rb_str_buf_append(str, str2);
OBJ_INFECT(str, str2);
return str;
}
REALLOC_N(RSTRING(str)->ptr, char, len+1);
memcpy(RSTRING(str)->ptr + RSTRING(str)->len,
RSTRING(str2)->ptr, RSTRING(str2)->len);
RSTRING(str)->len += RSTRING(str2)->len;
RSTRING(str)->ptr[RSTRING(str)->len] = '\0'; /* sentinel */
}
OBJ_INFECT(str, str2);
return str;
}
VALUE
rb_str_concat(str1, str2)
VALUE str1, str2;
{
if (FIXNUM_P(str2)) {
int i = FIX2INT(str2);
if (0 <= i && i <= 0xff) { /* byte */
char c = i;
return rb_str_cat(str1, &c, 1);
}
}
str1 = rb_str_append(str1, str2);
return str1;
}
int
rb_str_hash(str)
VALUE str;
{
register long len = RSTRING(str)->len;
register char *p = RSTRING(str)->ptr;
register int key = 0;
#ifdef HASH_ELFHASH
register unsigned int g;
while (len--) {
key = (key << 4) + *p++;
if (g = key & 0xF0000000)
key ^= g >> 24;
key &= ~g;
}
#elif HASH_PERL
if (ruby_ignorecase) {
while (len--) {
key = key*33 + toupper(*p);
p++;
}
}
else {
while (len--) {
key = key*33 + *p++;
}
}
key = key + (key>>5);
#else
if (ruby_ignorecase) {
while (len--) {
key = key*65599 + toupper(*p);
p++;
}
}
else {
while (len--) {
key = key*65599 + *p;
p++;
}
}
key = key + (key>>5);
#endif
return key;
}
static VALUE
rb_str_hash_m(str)
VALUE str;
{
int key = rb_str_hash(str);
return INT2FIX(key);
}
#define lesser(a,b) (((a)>(b))?(b):(a))
int
rb_str_cmp(str1, str2)
VALUE str1, str2;
{
long len;
int retval;
len = lesser(RSTRING(str1)->len, RSTRING(str2)->len);
retval = rb_memcmp(RSTRING(str1)->ptr, RSTRING(str2)->ptr, len);
if (retval == 0) {
if (RSTRING(str1)->len == RSTRING(str2)->len) return 0;
if (RSTRING(str1)->len > RSTRING(str2)->len) return 1;
return -1;
}
if (retval == 0) return 0;
if (retval > 0) return 1;
return -1;
}
static VALUE
rb_str_equal(str1, str2)
VALUE str1, str2;
{
if (TYPE(str2) != T_STRING)
return Qfalse;
if (RSTRING(str1)->len == RSTRING(str2)->len
&& rb_str_cmp(str1, str2) == 0) {
return Qtrue;
}
return Qfalse;
}
static VALUE
rb_str_cmp_m(str1, str2)
VALUE str1, str2;
{
int result;
StringValue(str2);
result = rb_str_cmp(str1, str2);
return INT2FIX(result);
}
static VALUE
rb_str_match(x, y)
VALUE x, y;
{
VALUE reg;
long start;
switch (TYPE(y)) {
case T_REGEXP:
return rb_reg_match(y, x);
case T_STRING:
reg = rb_reg_regcomp(y);
start = rb_reg_search(reg, x, 0, 0);
if (start == -1) {
return Qnil;
}
return INT2NUM(start);
default:
return rb_funcall(y, rb_intern("=~"), 1, x);
}
}
static VALUE
rb_str_match2(str)
VALUE str;
{
return rb_reg_match2(rb_reg_regcomp(str));
}
static long
rb_str_index(str, sub, offset)
VALUE str, sub;
long offset;
{
char *s, *e, *p;
long len;
if (offset < 0) {
offset += RSTRING(str)->len;
if (offset < 0) return -1;
}
if (RSTRING(str)->len - offset < RSTRING(sub)->len) return -1;
s = RSTRING(str)->ptr+offset;
p = RSTRING(sub)->ptr;
len = RSTRING(sub)->len;
if (len == 0) return offset;
e = RSTRING(str)->ptr + RSTRING(str)->len - len + 1;
while (s < e) {
if (rb_memcmp(s, p, len) == 0) {
return (s-(RSTRING(str)->ptr));
}
s++;
}
return -1;
}
static VALUE
rb_str_index_m(argc, argv, str)
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 += RSTRING(str)->len;
if (pos < 0) return Qnil;
}
switch (TYPE(sub)) {
case T_REGEXP:
pos = rb_reg_adjust_startpos(sub, str, pos, 0);
pos = rb_reg_search(sub, str, pos, 0);
break;
case T_STRING:
pos = rb_str_index(str, sub, pos);
break;
case T_FIXNUM:
{
int c = FIX2INT(sub);
long len = RSTRING(str)->len;
char *p = RSTRING(str)->ptr;
for (;pos<len;pos++) {
if (p[pos] == c) return INT2NUM(pos);
}
return Qnil;
}
default:
rb_raise(rb_eTypeError, "type mismatch: %s given",
rb_class2name(CLASS_OF(sub)));
}
if (pos == -1) return Qnil;
return INT2NUM(pos);
}
static VALUE
rb_str_rindex(argc, argv, str)
int argc;
VALUE *argv;
VALUE str;
{
VALUE sub;
VALUE position;
int pos, len;
char *s, *sbeg, *t;
if (rb_scan_args(argc, argv, "11", &sub, &position) == 2) {
pos = NUM2INT(position);
if (pos < 0) {
pos += RSTRING(str)->len;
if (pos < 0) return Qnil;
}
if (pos > RSTRING(str)->len) pos = RSTRING(str)->len;
}
else {
pos = RSTRING(str)->len;
}
switch (TYPE(sub)) {
case T_REGEXP:
if (RREGEXP(sub)->len) {
pos = rb_reg_adjust_startpos(sub, str, pos, 1);
pos = rb_reg_search(sub, str, pos, 1);
}
if (pos >= 0) return INT2NUM(pos);
break;
case T_STRING:
len = RSTRING(sub)->len;
/* substring longer than string */
if (RSTRING(str)->len < len) return Qnil;
if (RSTRING(str)->len - pos < len) {
pos = RSTRING(str)->len - len;
}
sbeg = RSTRING(str)->ptr;
s = RSTRING(str)->ptr + pos;
t = RSTRING(sub)->ptr;
if (len) {
while (sbeg <= s) {
if (rb_memcmp(s, t, len) == 0) {
return INT2NUM(s - RSTRING(str)->ptr);
}
s--;
}
}
else {
return INT2NUM(pos);
}
break;
case T_FIXNUM:
{
int c = FIX2INT(sub);
char *p = RSTRING(str)->ptr + pos;
char *pbeg = RSTRING(str)->ptr;
while (pbeg <= p) {
if (*p == c) return INT2NUM(p - RSTRING(str)->ptr);
p--;
}
return Qnil;
}
default:
rb_raise(rb_eTypeError, "type mismatch: %s given",
rb_class2name(CLASS_OF(sub)));
}
return Qnil;
}
static char
succ_char(s)
char *s;
{
char c = *s;
/* numerics */
if ('0' <= c && c < '9') (*s)++;
else if (c == '9') {
*s = '0';
return '1';
}
/* small alphabets */
else if ('a' <= c && c < 'z') (*s)++;
else if (c == 'z') {
return *s = 'a';
}
/* capital alphabets */
else if ('A' <= c && c < 'Z') (*s)++;
else if (c == 'Z') {
return *s = 'A';
}
return 0;
}
static VALUE
rb_str_succ(orig)
VALUE orig;
{
VALUE str;
char *sbeg, *s;
int c = -1;
int n = 0;
str = rb_str_new(RSTRING(orig)->ptr, RSTRING(orig)->len);
OBJ_INFECT(str, orig);
if (RSTRING(str)->len == 0) return str;
sbeg = RSTRING(str)->ptr; s = sbeg + RSTRING(str)->len - 1;
while (sbeg <= s) {
if (ISALNUM(*s)) {
if ((c = succ_char(s)) == 0) break;
n = s - sbeg;
}
s--;
}
if (c == -1) { /* str contains no alnum */
sbeg = RSTRING(str)->ptr; s = sbeg + RSTRING(str)->len - 1;
c = '\001';
while (sbeg <= s) {
*s += 1;
if (*s-- != 0) break;
}
}
if (s < sbeg) {
REALLOC_N(RSTRING(str)->ptr, char, RSTRING(str)->len + 1);
s = RSTRING(str)->ptr + n;
memmove(s+1, s, RSTRING(str)->len - n);
*s = c;
RSTRING(str)->len += 1;
RSTRING(str)->ptr[RSTRING(str)->len] = '\0';
}
return str;
}
static VALUE
rb_str_succ_bang(str)
VALUE str;
{
rb_str_modify(str);
rb_str_become(str, rb_str_succ(str));
return str;
}
VALUE
rb_str_upto(beg, end, excl)
VALUE beg, end;
int excl;
{
VALUE current;
ID succ = rb_intern("succ");
StringValue(end);
current = beg;
while (rb_str_cmp(current, end) <= 0) {
rb_yield(current);
if (!excl && rb_str_equal(current, end)) break;
current = rb_funcall(current, succ, 0, 0);
if (excl && rb_str_equal(current, end)) break;
if (RSTRING(current)->len > RSTRING(end)->len)
break;
}
return beg;
}
static VALUE
rb_str_upto_m(beg, end)
VALUE beg, end;
{
return rb_str_upto(beg, end, 0);
}
static VALUE
rb_str_aref(str, indx)
VALUE str;
VALUE indx;
{
long idx;
switch (TYPE(indx)) {
case T_FIXNUM:
idx = FIX2LONG(indx);
num_index:
if (idx < 0) {
idx = RSTRING(str)->len + idx;
}
if (idx < 0 || RSTRING(str)->len <= idx) {
return Qnil;
}
return INT2FIX(RSTRING(str)->ptr[idx] & 0xff);
case T_REGEXP:
if (rb_reg_search(indx, str, 0, 0) >= 0)
return rb_reg_last_match(rb_backref_get());
return Qnil;
case T_STRING:
if (rb_str_index(str, indx, 0) != -1) return indx;
return Qnil;
default:
/* check if indx is Range */
{
long beg, len;
switch (rb_range_beg_len(indx, &beg, &len, RSTRING(str)->len, 0)) {
case Qfalse:
break;
case Qnil:
return Qnil;
default:
return rb_str_substr(str, beg, len);
}
}
idx = NUM2LONG(indx);
goto num_index;
}
return Qnil; /* not reached */
}
static VALUE
rb_str_aref_m(argc, argv, str)
int argc;
VALUE *argv;
VALUE str;
{
if (argc == 2) {
return rb_str_substr(str, NUM2INT(argv[0]), NUM2INT(argv[1]));
}
if (argc != 1) {
rb_raise(rb_eArgError, "wrong # of arguments(%d for 1)", argc);
}
return rb_str_aref(str, argv[0]);
}
void
rb_str_update(str, beg, len, val)
VALUE str;
long beg;
long len;
VALUE val;
{
if (len < 0) rb_raise(rb_eIndexError, "negative length %d", len);
if (beg < 0) {
beg += RSTRING(str)->len;
}
if (beg < 0 || RSTRING(str)->len < beg) {
if (beg < 0) {
beg -= RSTRING(str)->len;
}
rb_raise(rb_eIndexError, "index %d out of string", beg);
}
if (RSTRING(str)->len < beg + len) {
len = RSTRING(str)->len - beg;
}
StringValue(val);
if (len < RSTRING(val)->len) {
/* expand string */
REALLOC_N(RSTRING(str)->ptr, char, RSTRING(str)->len+RSTRING(val)->len-len+1);
}
if (RSTRING(val)->len != len) {
memmove(RSTRING(str)->ptr + beg + RSTRING(val)->len,
RSTRING(str)->ptr + beg + len,
RSTRING(str)->len - (beg + len));
}
if (RSTRING(str)->len < beg && len < 0) {
MEMZERO(RSTRING(str)->ptr + RSTRING(str)->len, char, -len);
}
if (RSTRING(val)->len > 0) {
memmove(RSTRING(str)->ptr+beg, RSTRING(val)->ptr, RSTRING(val)->len);
}
RSTRING(str)->len += RSTRING(val)->len - len;
RSTRING(str)->ptr[RSTRING(str)->len] = '\0';
OBJ_INFECT(str, val);
}
static VALUE rb_str_sub_bang _((int, VALUE*, VALUE));
static VALUE
rb_str_aset(str, indx, val)
VALUE str;
VALUE indx, val;
{
long idx, beg;
switch (TYPE(indx)) {
case T_FIXNUM:
num_index:
idx = NUM2INT(indx);
if (idx < 0) {
idx += RSTRING(str)->len;
}
if (idx < 0 || RSTRING(str)->len <= idx) {
rb_raise(rb_eIndexError, "index %d out of string", idx);
}
if (FIXNUM_P(val)) {
if (RSTRING(str)->len == idx) {
RSTRING(str)->len += 1;
REALLOC_N(RSTRING(str)->ptr, char, RSTRING(str)->len);
}
RSTRING(str)->ptr[idx] = NUM2INT(val) & 0xff;
}
else {
rb_str_update(str, idx, 1, val);
}
return val;
case T_REGEXP:
{
VALUE args[2];
args[0] = indx;
args[1] = val;
rb_str_sub_bang(2, args, str);
}
return val;
case T_STRING:
beg = rb_str_index(str, indx, 0);
if (beg != -1) {
rb_str_update(str, beg, RSTRING(indx)->len, val);
}
return val;
default:
/* check if indx is Range */
{
long beg, len;
if (rb_range_beg_len(indx, &beg, &len, RSTRING(str)->len, 2)) {
rb_str_update(str, beg, len, val);
return val;
}
}
idx = NUM2LONG(indx);
goto num_index;
}
}
static VALUE
rb_str_aset_m(argc, argv, str)
int argc;
VALUE *argv;
VALUE str;
{
rb_str_modify(str);
if (argc == 3) {
long beg, len;
beg = NUM2INT(argv[0]);
len = NUM2INT(argv[1]);
rb_str_update(str, beg, len, argv[2]);
return argv[2];
}
if (argc != 2) {
rb_raise(rb_eArgError, "wrong # of arguments(%d for 2)", argc);
}
return rb_str_aset(str, argv[0], argv[1]);
}
static VALUE
rb_str_insert(str, idx, str2)
VALUE str, idx, str2;
{
long pos = NUM2LONG(idx);
if (pos == -1) {
pos = RSTRING(str)->len;
}
else if (pos < 0) {
pos++;
}
rb_str_update(str, pos, 0, str2);
return str;
}
static VALUE
rb_str_slice_bang(argc, argv, str)
int argc;
VALUE *argv;
VALUE str;
{
VALUE result;
VALUE buf[3];
int i;
if (argc < 1 || 2 < argc) {
rb_raise(rb_eArgError, "wrong # of arguments(%d for 1)", argc);
}
for (i=0; i<argc; i++) {
buf[i] = argv[i];
}
buf[i] = rb_str_new(0,0);
result = rb_str_aref_m(argc, buf, str);
rb_str_aset_m(argc+1, buf, str);
return result;
}
static VALUE
get_pat(pat)
VALUE pat;
{
switch (TYPE(pat)) {
case T_REGEXP:
break;
case T_STRING:
pat = rb_reg_regcomp(pat);
break;
default:
/* type failed */
Check_Type(pat, T_REGEXP);
}
return pat;
}
static VALUE
rb_str_sub_bang(argc, argv, str)
int argc;
VALUE *argv;
VALUE str;
{
VALUE pat, repl, match;
struct re_registers *regs;
int iter = 0;
int tainted = 0;
long plen;
if (argc == 1 && rb_block_given_p()) {
iter = 1;
}
else if (argc == 2) {
repl = argv[1];
StringValue(repl);
if (OBJ_TAINTED(repl)) tainted = 1;
}
else {
rb_raise(rb_eArgError, "wrong # of arguments(%d for 2)", argc);
}
pat = get_pat(argv[0]);
if (rb_reg_search(pat, str, 0, 0) >= 0) {
rb_str_modify(str);
match = rb_backref_get();
regs = RMATCH(match)->regs;
if (iter) {
rb_match_busy(match);
repl = rb_obj_as_string(rb_yield(rb_reg_nth_match(0, match)));
rb_backref_set(match);
}
else {
repl = rb_reg_regsub(repl, str, regs);
}
if (OBJ_TAINTED(repl)) tainted = 1;
plen = END(0) - BEG(0);
if (RSTRING(repl)->len > plen) {
REALLOC_N(RSTRING(str)->ptr, char,
RSTRING(str)->len + RSTRING(repl)->len - plen + 1);
}
if (RSTRING(repl)->len != plen) {
memmove(RSTRING(str)->ptr + BEG(0) + RSTRING(repl)->len,
RSTRING(str)->ptr + BEG(0) + plen,
RSTRING(str)->len - BEG(0) - plen);
}
memcpy(RSTRING(str)->ptr + BEG(0),
RSTRING(repl)->ptr, RSTRING(repl)->len);
RSTRING(str)->len += RSTRING(repl)->len - plen;
RSTRING(str)->ptr[RSTRING(str)->len] = '\0';
if (tainted) OBJ_TAINT(str);
return str;
}
return Qnil;
}
static VALUE
rb_str_sub(argc, argv, str)
int argc;
VALUE *argv;
VALUE str;
{
str = rb_str_dup(str);
rb_str_sub_bang(argc, argv, str);
return str;
}
static VALUE
str_gsub(argc, argv, str, bang)
int argc;
VALUE *argv;
VALUE str;
int bang;
{
VALUE pat, val, repl, match;
struct re_registers *regs;
long beg, n;
long offset, blen, len;
int iter = 0;
char *buf, *bp, *cp;
int tainted = 0;
if (argc == 1 && rb_block_given_p()) {
iter = 1;
}
else if (argc == 2) {
repl = argv[1];
StringValue(repl);
if (OBJ_TAINTED(repl)) tainted = 1;
}
else {
rb_raise(rb_eArgError, "wrong # of arguments(%d for 2)", argc);
}
pat = get_pat(argv[0]);
offset=0; n=0;
beg = rb_reg_search(pat, str, 0, 0);
if (beg < 0) {
if (bang) return Qnil; /* no match, no substitution */
return rb_str_dup(str);
}
blen = RSTRING(str)->len + 30; /* len + margin */
buf = ALLOC_N(char, blen);
bp = buf;
cp = RSTRING(str)->ptr;
while (beg >= 0) {
n++;
match = rb_backref_get();
regs = RMATCH(match)->regs;
if (iter) {
rb_match_busy(match);
val = rb_obj_as_string(rb_yield(rb_reg_nth_match(0, match)));
rb_backref_set(match);
}
else {
val = rb_reg_regsub(repl, str, regs);
}
if (OBJ_TAINTED(val)) tainted = 1;
len = (bp - buf) + (beg - offset) + RSTRING(val)->len + 3;
if (blen < len) {
while (blen < len) blen *= 2;
len = bp - buf;
REALLOC_N(buf, char, blen);
bp = buf + len;
}
len = beg - offset; /* copy pre-match substr */
memcpy(bp, cp, len);
bp += len;
memcpy(bp, RSTRING(val)->ptr, RSTRING(val)->len);
bp += RSTRING(val)->len;
if (BEG(0) == END(0)) {
/*
* Always consume at least one character of the input string
* in order to prevent infinite loops.
*/
len = mbclen2(RSTRING(str)->ptr[END(0)], pat);
if (RSTRING(str)->len > END(0)) {
memcpy(bp, RSTRING(str)->ptr+END(0), len);
bp += len;
}
offset = END(0) + len;
}
else {
offset = END(0);
}
cp = RSTRING(str)->ptr + offset;
if (offset > RSTRING(str)->len) break;
beg = rb_reg_search(pat, str, offset, 0);
}
if (RSTRING(str)->len > offset) {
len = bp - buf;
if (blen - len < RSTRING(str)->len - offset + 1) {
REALLOC_N(buf, char, len + RSTRING(str)->len - offset + 1);
bp = buf + len;
}
memcpy(bp, cp, RSTRING(str)->len - offset);
bp += RSTRING(str)->len - offset;
}
rb_backref_set(match);
if (bang) {
if (str_independent(str)) {
free(RSTRING(str)->ptr);
}
else {
RSTRING(str)->orig = 0;
}
}
else {
NEWOBJ(dup, struct RString);
OBJSETUP(dup, rb_cString, T_STRING);
OBJ_INFECT(dup, str);
str = (VALUE)dup;
dup->orig = 0;
}
RSTRING(str)->ptr = buf;
RSTRING(str)->len = len = bp - buf;
RSTRING(str)->ptr[len] = '\0';
if (tainted) OBJ_TAINT(str);
return str;
}
static VALUE
rb_str_gsub_bang(argc, argv, str)
int argc;
VALUE *argv;
VALUE str;
{
return str_gsub(argc, argv, str, 1);
}
static VALUE
rb_str_gsub(argc, argv, str)
int argc;
VALUE *argv;
VALUE str;
{
return str_gsub(argc, argv, str, 0);
}
static VALUE
rb_str_replace(str, str2)
VALUE str, str2;
{
if (str == str2) return str;
StringValue(str2);
if (RSTRING(str2)->orig && !FL_TEST(str2, STR_NO_ORIG)) {
if (str_independent(str)) {
free(RSTRING(str)->ptr);
}
RSTRING(str)->len = RSTRING(str2)->len;
RSTRING(str)->ptr = RSTRING(str2)->ptr;
RSTRING(str)->orig = RSTRING(str2)->orig;
}
else {
rb_str_modify(str);
rb_str_resize(str, RSTRING(str2)->len);
memcpy(RSTRING(str)->ptr, RSTRING(str2)->ptr, RSTRING(str2)->len);
}
if (OBJ_TAINTED(str2)) OBJ_TAINT(str);
return str;
}
static VALUE
uscore_get()
{
VALUE line;
line = rb_lastline_get();
if (TYPE(line) != T_STRING) {
rb_raise(rb_eTypeError, "$_ value need to be String (%s given)",
NIL_P(line)?"nil":rb_class2name(CLASS_OF(line)));
}
return line;
}
static VALUE
rb_f_sub_bang(argc, argv)
int argc;
VALUE *argv;
{
return rb_str_sub_bang(argc, argv, uscore_get());
}
static VALUE
rb_f_sub(argc, argv)
int argc;
VALUE *argv;
{
VALUE str = rb_str_dup(uscore_get());
if (NIL_P(rb_str_sub_bang(argc, argv, str)))
return str;
rb_lastline_set(str);
return str;
}
static VALUE
rb_f_gsub_bang(argc, argv)
int argc;
VALUE *argv;
{
return rb_str_gsub_bang(argc, argv, uscore_get());
}
static VALUE
rb_f_gsub(argc, argv)
int argc;
VALUE *argv;
{
VALUE str = rb_str_dup(uscore_get());
if (NIL_P(rb_str_gsub_bang(argc, argv, str)))
return str;
rb_lastline_set(str);
return str;
}
static VALUE
rb_str_reverse_bang(str)
VALUE str;
{
char *s, *e;
char c;
rb_str_modify(str);
s = RSTRING(str)->ptr;
e = s + RSTRING(str)->len - 1;
while (s < e) {
c = *s;
*s++ = *e;
*e-- = c;
}
return str;
}
static VALUE
rb_str_reverse(str)
VALUE str;
{
VALUE obj;
char *s, *e, *p;
if (RSTRING(str)->len <= 1) return rb_str_dup(str);
obj = rb_str_new(0, RSTRING(str)->len);
s = RSTRING(str)->ptr; e = s + RSTRING(str)->len - 1;
p = RSTRING(obj)->ptr;
while (e >= s) {
*p++ = *e--;
}
return obj;
}
static VALUE
rb_str_include(str, arg)
VALUE str, arg;
{
long i;
if (FIXNUM_P(arg)) {
int c = FIX2INT(arg);
long len = RSTRING(str)->len;
char *p = RSTRING(str)->ptr;
for (i=0; i<len; i++) {
if (p[i] == c) {
return Qtrue;
}
}
return Qfalse;
}
StringValue(arg);
i = rb_str_index(str, arg, 0);
if (i == -1) return Qfalse;
return Qtrue;
}
static VALUE
rb_str_to_i(str)
VALUE str;
{
return rb_str2inum(str, 10);
}
static VALUE
rb_str_to_f(str)
VALUE str;
{
double f = strtod(RSTRING(str)->ptr, 0);
return rb_float_new(f);
}
static VALUE
rb_str_to_s(str)
VALUE str;
{
return str;
}
VALUE
rb_str_inspect(str)
VALUE str;
{
char *p, *pend;
VALUE result = rb_str_buf_new2("\"");
char s[5];
p = RSTRING(str)->ptr; pend = p + RSTRING(str)->len;
while (p < pend) {
char c = *p++;
if (ismbchar(c) && p < pend) {
int len = mbclen(c);
rb_str_buf_cat(result, p - 1, len);
p += len - 1;
}
else if (c == '"'|| c == '\\') {
s[0] = '\\'; s[1] = c;
rb_str_buf_cat(result, s, 2);
}
else if (ISPRINT(c)) {
s[0] = c;
rb_str_buf_cat(result, s, 1);
}
else if (c == '\n') {
s[0] = '\\'; s[1] = 'n';
rb_str_buf_cat(result, s, 2);
}
else if (c == '\r') {
s[0] = '\\'; s[1] = 'r';
rb_str_buf_cat(result, s, 2);
}
else if (c == '\t') {
s[0] = '\\'; s[1] = 't';
rb_str_buf_cat(result, s, 2);
}
else if (c == '\f') {
s[0] = '\\'; s[1] = 'f';
rb_str_buf_cat(result, s, 2);
}
else if (c == '\013') {
s[0] = '\\'; s[1] = 'v';
rb_str_buf_cat(result, s, 2);
}
else if (c == '\007') {
s[0] = '\\'; s[1] = 'a';
rb_str_buf_cat(result, s, 2);
}
else if (c == 033) {
s[0] = '\\'; s[1] = 'e';
rb_str_buf_cat(result, s, 2);
}
else {
sprintf(s, "\\%03o", c & 0377);
rb_str_buf_cat2(result, s);
}
}
rb_str_buf_cat2(result, "\"");
OBJ_INFECT(result, str);
return result;
}
static VALUE
rb_str_dump(str)
VALUE str;
{
long len;
char *p, *pend;
char *q, *qend;
VALUE result;
len = 2; /* "" */
p = RSTRING(str)->ptr; pend = p + RSTRING(str)->len;
while (p < pend) {
char c = *p++;
switch (c) {
case '"': case '\\':
case '\n': case '\r':
case '\t': case '\f': case '#':
case '\013': case '\007': case '\033':
len += 2;
break;
default:
if (ISPRINT(c)) {
len++;
}
else {
len += 4; /* \nnn */
}
break;
}
}
result = rb_str_new(0, len);
p = RSTRING(str)->ptr; pend = p + RSTRING(str)->len;
q = RSTRING(result)->ptr; qend = q + len;
*q++ = '"';
while (p < pend) {
char c = *p++;
if (c == '"' || c == '\\') {
*q++ = '\\';
*q++ = c;
}
else if (c == '#') {
*q++ = '\\';
*q++ = '#';
}
else if (ISPRINT(c)) {
*q++ = c;
}
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 == '\007') {
*q++ = '\\';
*q++ = 'a';
}
else if (c == '\033') {
*q++ = '\\';
*q++ = 'e';
}
else {
*q++ = '\\';
sprintf(q, "%03o", c&0xff);
q += 3;
}
}
*q++ = '"';
OBJ_INFECT(result, str);
return result;
}
static VALUE
rb_str_upcase_bang(str)
VALUE str;
{
char *s, *send;
int modify = 0;
rb_str_modify(str);
s = RSTRING(str)->ptr; send = s + RSTRING(str)->len;
while (s < send) {
if (ismbchar(*s)) {
s+=mbclen(*s) - 1;
}
else if (ISLOWER(*s)) {
*s = toupper(*s);
modify = 1;
}
s++;
}
if (modify) return str;
return Qnil;
}
static VALUE
rb_str_upcase(str)
VALUE str;
{
str = rb_str_dup(str);
rb_str_upcase_bang(str);
return str;
}
static VALUE
rb_str_downcase_bang(str)
VALUE str;
{
char *s, *send;
int modify = 0;
rb_str_modify(str);
s = RSTRING(str)->ptr; send = s + RSTRING(str)->len;
while (s < send) {
if (ismbchar(*s)) {
s+=mbclen(*s) - 1;
}
else if (ISUPPER(*s)) {
*s = tolower(*s);
modify = 1;
}
s++;
}
if (modify) return str;
return Qnil;
}
static VALUE
rb_str_downcase(str)
VALUE str;
{
str = rb_str_dup(str);
rb_str_downcase_bang(str);
return str;
}
static VALUE
rb_str_capitalize_bang(str)
VALUE str;
{
char *s, *send;
int modify = 0;
rb_str_modify(str);
s = RSTRING(str)->ptr; send = s + RSTRING(str)->len;
if (ISLOWER(*s)) {
*s = toupper(*s);
modify = 1;
}
while (++s < send) {
if (ismbchar(*s)) {
s+=mbclen(*s) - 1;
}
else if (ISUPPER(*s)) {
*s = tolower(*s);
modify = 1;
}
}
if (modify) return str;
return Qnil;
}
static VALUE
rb_str_capitalize(str)
VALUE str;
{
str = rb_str_dup(str);
rb_str_capitalize_bang(str);
return str;
}
static VALUE
rb_str_swapcase_bang(str)
VALUE str;
{
char *s, *send;
int modify = 0;
rb_str_modify(str);
s = RSTRING(str)->ptr; send = s + RSTRING(str)->len;
while (s < send) {
if (ismbchar(*s)) {
s+=mbclen(*s) - 1;
}
else if (ISUPPER(*s)) {
*s = tolower(*s);
modify = 1;
}
else if (ISLOWER(*s)) {
*s = toupper(*s);
modify = 1;
}
s++;
}
if (modify) return str;
return Qnil;
}
static VALUE
rb_str_swapcase(str)
VALUE str;
{
str = rb_str_dup(str);
rb_str_swapcase_bang(str);
return str;
}
typedef unsigned char *USTR;
struct tr {
int gen, now, max;
char *p, *pend;
};
static int
trnext(t)
struct tr *t;
{
for (;;) {
if (!t->gen) {
if (t->p == t->pend) return -1;
t->now = *(USTR)t->p++;
if (t->p < t->pend - 1 && *t->p == '\\') {
t->p++;
}
else if (t->p < t->pend - 1 && *t->p == '-') {
t->p++;
if (t->p < t->pend) {
if (t->now > *(USTR)t->p) {
t->p++;
continue;
}
t->gen = 1;
t->max = *(USTR)t->p++;
}
}
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(str, src, repl, sflag)
VALUE str, src, repl;
int sflag;
{
struct tr trsrc, trrepl;
int cflag = 0;
int trans[256];
int i, c, modify = 0;
char *s, *send;
rb_str_modify(str);
StringValue(src);
StringValue(repl);
trsrc.p = RSTRING(src)->ptr; trsrc.pend = trsrc.p + RSTRING(src)->len;
if (RSTRING(src)->len >= 2 && RSTRING(src)->ptr[0] == '^') {
cflag++;
trsrc.p++;
}
if (RSTRING(repl)->len == 0) {
return rb_str_delete_bang(1, &src, str);
}
trrepl.p = RSTRING(repl)->ptr;
trrepl.pend = trrepl.p + RSTRING(repl)->len;
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)) >= 0) {
trans[c & 0xff] = -1;
}
while ((c = trnext(&trrepl)) >= 0)
/* retrieve last replacer */;
for (i=0; i<256; i++) {
if (trans[i] >= 0) {
trans[i] = trrepl.now;
}
}
}
else {
int r;
for (i=0; i<256; i++) {
trans[i] = -1;
}
while ((c = trnext(&trsrc)) >= 0) {
r = trnext(&trrepl);
if (r == -1) r = trrepl.now;
trans[c & 0xff] = r;
}
}
s = RSTRING(str)->ptr; send = s + RSTRING(str)->len;
if (sflag) {
char *t = s;
int c0, last = -1;
while (s < send) {
c0 = *s++;
if ((c = trans[c0 & 0xff]) >= 0) {
if (last == c) continue;
last = c;
*t++ = c & 0xff;
modify = 1;
}
else {
last = -1;
*t++ = c0;
}
}
if (RSTRING(str)->len > (t - RSTRING(str)->ptr)) {
RSTRING(str)->len = (t - RSTRING(str)->ptr);
modify = 1;
*t = '\0';
}
}
else {
while (s < send) {
if ((c = trans[*s & 0xff]) >= 0) {
*s = c & 0xff;
modify = 1;
}
s++;
}
}
if (modify) return str;
return Qnil;
}
static VALUE
rb_str_tr_bang(str, src, repl)
VALUE str, src, repl;
{
return tr_trans(str, src, repl, 0);
}
static VALUE
rb_str_tr(str, src, repl)
VALUE str, src, repl;
{
str = rb_str_dup(str);
tr_trans(str, src, repl, 0);
return str;
}
static void
tr_setup_table(str, table, init)
VALUE str;
char table[256];
int init;
{
char buf[256];
struct tr tr;
int i, c;
int cflag = 0;
tr.p = RSTRING(str)->ptr; tr.pend = tr.p + RSTRING(str)->len;
tr.gen = tr.now = tr.max = 0;
if (RSTRING(str)->len > 1 && RSTRING(str)->ptr[0] == '^') {
cflag = 1;
tr.p++;
}
if (init) {
for (i=0; i<256; i++) {
table[i] = 1;
}
}
for (i=0; i<256; i++) {
buf[i] = cflag;
}
while ((c = trnext(&tr)) >= 0) {
buf[c & 0xff] = !cflag;
}
for (i=0; i<256; i++) {
table[i] = table[i]&&buf[i];
}
}
static VALUE
rb_str_delete_bang(argc, argv, str)
int argc;
VALUE *argv;
VALUE str;
{
char *s, *send, *t;
char squeez[256];
int modify = 0;
int init = 1;
int i;
if (argc < 1) {
rb_raise(rb_eArgError, "wrong # of arguments");
}
for (i=0; i<argc; i++) {
VALUE s = argv[i];
StringValue(s);
tr_setup_table(s, squeez, init);
init = 0;
}
rb_str_modify(str);
s = t = RSTRING(str)->ptr;
send = s + RSTRING(str)->len;
while (s < send) {
if (squeez[*s & 0xff])
modify = 1;
else
*t++ = *s;
s++;
}
*t = '\0';
RSTRING(str)->len = t - RSTRING(str)->ptr;
if (modify) return str;
return Qnil;
}
static VALUE
rb_str_delete(argc, argv, str)
int argc;
VALUE *argv;
VALUE str;
{
str = rb_str_dup(str);
rb_str_delete_bang(argc, argv, str);
return str;
}
static VALUE
rb_str_squeeze_bang(argc, argv, str)
int argc;
VALUE *argv;
VALUE str;
{
char squeez[256];
char *s, *send, *t;
int c, save, modify = 0;
int init = 1;
int i;
if (argc == 0) {
for (i=0; i<256; i++) {
squeez[i] = 1;
}
}
else {
for (i=0; i<argc; i++) {
VALUE s = argv[i];
StringValue(s);
tr_setup_table(s, squeez, init);
init = 0;
}
}
rb_str_modify(str);
s = t = RSTRING(str)->ptr;
send = s + RSTRING(str)->len;
save = -1;
while (s < send) {
c = *s++ & 0xff;
if (c != save || !squeez[c]) {
*t++ = save = c;
}
}
*t = '\0';
if (t - RSTRING(str)->ptr != RSTRING(str)->len) {
RSTRING(str)->len = t - RSTRING(str)->ptr;
modify = 1;
}
if (modify) return str;
return Qnil;
}
static VALUE
rb_str_squeeze(argc, argv, str)
int argc;
VALUE *argv;
VALUE str;
{
str = rb_str_dup(str);
rb_str_squeeze_bang(argc, argv, str);
return str;
}
static VALUE
rb_str_tr_s_bang(str, src, repl)
VALUE str, src, repl;
{
return tr_trans(str, src, repl, 1);
}
static VALUE
rb_str_tr_s(str, src, repl)
VALUE str, src, repl;
{
str = rb_str_dup(str);
tr_trans(str, src, repl, 1);
return str;
}
static VALUE
rb_str_count(argc, argv, str)
int argc;
VALUE *argv;
VALUE str;
{
char table[256];
char *s, *send;
int init = 1;
int i;
if (argc < 1) {
rb_raise(rb_eArgError, "wrong # of arguments");
}
for (i=0; i<argc; i++) {
VALUE s = argv[i];
StringValue(s);
tr_setup_table(s, table, init);
init = 0;
}
s = RSTRING(str)->ptr;
send = s + RSTRING(str)->len;
i = 0;
while (s < send) {
if (table[*s++ & 0xff]) {
i++;
}
}
return INT2NUM(i);
}
static VALUE
rb_str_split_m(argc, argv, str)
int argc;
VALUE *argv;
VALUE str;
{
VALUE spat;
VALUE limit;
int char_sep = -1;
long beg, end, i;
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) return rb_ary_new3(1, str);
i = 1;
}
if (argc == 0) {
if (!NIL_P(rb_fs)) {
spat = rb_fs;
goto fs_set;
}
char_sep = ' ';
}
else {
fs_set:
switch (TYPE(spat)) {
case T_STRING:
if (RSTRING(spat)->len == 1) {
char_sep = (unsigned char)RSTRING(spat)->ptr[0];
}
else {
spat = rb_reg_regcomp(spat);
}
break;
case T_REGEXP:
break;
default:
rb_raise(rb_eArgError, "bad separator");
}
}
result = rb_ary_new();
beg = 0;
if (char_sep >= 0) {
char *ptr = RSTRING(str)->ptr;
long len = RSTRING(str)->len;
char *eptr = ptr + len;
if (char_sep == ' ') { /* AWK emulation */
int skip = 1;
for (end = beg = 0; ptr<eptr; ptr++) {
if (skip) {
if (ISSPACE(*ptr)) {
beg++;
}
else {
end = beg+1;
skip = 0;
}
}
else {
if (ISSPACE(*ptr)) {
rb_ary_push(result, rb_str_substr(str, beg, end-beg));
skip = 1;
beg = end + 1;
if (!NIL_P(limit) && lim <= ++i) break;
}
else {
end++;
}
}
}
}
else {
for (end = beg = 0; ptr<eptr; ptr++) {
if (*ptr == (char)char_sep) {
rb_ary_push(result, rb_str_substr(str, beg, end-beg));
beg = end + 1;
if (!NIL_P(limit) && lim <= ++i) break;
}
end++;
if (ismbchar(*ptr)) {ptr++; end++;}
}
}
}
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(rb_backref_get())->regs;
if (start == end && BEG(0) == END(0)) {
if (last_null == 1) {
rb_ary_push(result, rb_str_substr(str, beg, mbclen2(RSTRING(str)->ptr[beg],spat)));
beg = start;
}
else {
start += mbclen2(RSTRING(str)->ptr[start],spat);
last_null = 1;
continue;
}
}
else {
rb_ary_push(result, rb_str_substr(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_new(0, 0);
else
tmp = rb_str_substr(str, BEG(idx), END(idx)-BEG(idx));
rb_ary_push(result, tmp);
}
if (!NIL_P(limit) && lim <= ++i) break;
}
}
if (!NIL_P(limit) || RSTRING(str)->len > beg || lim < 0) {
if (RSTRING(str)->len == beg)
tmp = rb_str_new(0, 0);
else
tmp = rb_str_substr(str, beg, RSTRING(str)->len-beg);
rb_ary_push(result, tmp);
}
if (NIL_P(limit) && lim == 0) {
while (RARRAY(result)->len > 0 &&
RSTRING(RARRAY(result)->ptr[RARRAY(result)->len-1])->len == 0)
rb_ary_pop(result);
}
return result;
}
VALUE
rb_str_split(str, sep0)
VALUE str;
const char *sep0;
{
VALUE sep;
StringValue(str);
sep = rb_str_new2(sep0);
return rb_str_split_m(1, &sep, str);
}
static VALUE
rb_f_split(argc, argv)
int argc;
VALUE *argv;
{
return rb_str_split_m(argc, argv, uscore_get());
}
static VALUE
rb_str_each_line(argc, argv, str)
int argc;
VALUE *argv;
VALUE str;
{
VALUE rs;
int newline;
int rslen;
char *p = RSTRING(str)->ptr, *pend = p + RSTRING(str)->len, *s;
char *ptr = p;
long len = RSTRING(str)->len;
VALUE line;
if (rb_scan_args(argc, argv, "01", &rs) == 0) {
rs = rb_rs;
}
if (NIL_P(rs)) {
rb_yield(str);
return str;
}
StringValue(rs);
rslen = RSTRING(rs)->len;
if (rslen == 0) {
newline = '\n';
}
else {
newline = RSTRING(rs)->ptr[rslen-1];
}
for (s = p, p += rslen; p < pend; p++) {
if (rslen == 0 && *p == '\n') {
if (*++p != '\n') continue;
while (*p == '\n') p++;
}
if (p[-1] == newline &&
(rslen <= 1 ||
rb_memcmp(RSTRING(rs)->ptr, p-rslen, rslen) == 0)) {
line = rb_str_new(s, p - s);
rb_yield(line);
if (RSTRING(str)->ptr != ptr || RSTRING(str)->len != len)
rb_raise(rb_eArgError, "string modified");
s = p;
}
}
if (s != pend) {
if (p > pend) p = pend;
line = rb_str_new(s, p - s);
OBJ_INFECT(line, str);
rb_yield(line);
}
return str;
}
static VALUE
rb_str_each_byte(str)
VALUE str;
{
long i;
for (i=0; i<RSTRING(str)->len; i++) {
rb_yield(INT2FIX(RSTRING(str)->ptr[i] & 0xff));
}
return str;
}
static VALUE
rb_str_chop_bang(str)
VALUE str;
{
if (RSTRING(str)->len > 0) {
rb_str_modify(str);
RSTRING(str)->len--;
if (RSTRING(str)->ptr[RSTRING(str)->len] == '\n') {
if (RSTRING(str)->len > 0 &&
RSTRING(str)->ptr[RSTRING(str)->len-1] == '\r') {
RSTRING(str)->len--;
}
}
RSTRING(str)->ptr[RSTRING(str)->len] = '\0';
return str;
}
return Qnil;
}
static VALUE
rb_str_chop(str)
VALUE str;
{
str = rb_str_dup(str);
rb_str_chop_bang(str);
return str;
}
static VALUE
rb_f_chop_bang(str)
VALUE str;
{
return rb_str_chop_bang(uscore_get());
}
static VALUE
rb_f_chop()
{
VALUE str = uscore_get();
if (RSTRING(str)->len > 0) {
str = rb_str_dup(str);
rb_str_chop_bang(str);
rb_lastline_set(str);
}
return str;
}
static VALUE
rb_str_chomp_bang(argc, argv, str)
int argc;
VALUE *argv;
VALUE str;
{
VALUE rs;
int newline;
int rslen;
char *p = RSTRING(str)->ptr;
long len = RSTRING(str)->len;
if (rb_scan_args(argc, argv, "01", &rs) == 0) {
rs = rb_rs;
}
if (NIL_P(rs)) return Qnil;
StringValue(rs);
rslen = RSTRING(rs)->len;
if (rslen == 0) {
while (len>0 && p[len-1] == '\n') {
len--;
}
if (len < RSTRING(str)->len) {
rb_str_modify(str);
RSTRING(str)->len = len;
RSTRING(str)->ptr[len] = '\0';
return str;
}
return Qnil;
}
if (rslen > len) return Qnil;
newline = RSTRING(rs)->ptr[rslen-1];
if (p[len-1] == newline &&
(rslen <= 1 ||
rb_memcmp(RSTRING(rs)->ptr, p+len-rslen, rslen) == 0)) {
rb_str_modify(str);
RSTRING(str)->len -= rslen;
RSTRING(str)->ptr[RSTRING(str)->len] = '\0';
return str;
}
return Qnil;
}
static VALUE
rb_str_chomp(argc, argv, str)
int argc;
VALUE *argv;
VALUE str;
{
str = rb_str_dup(str);
rb_str_chomp_bang(argc, argv, str);
return str;
}
static VALUE
rb_f_chomp_bang(argc, argv)
int argc;
VALUE *argv;
{
return rb_str_chomp_bang(argc, argv, uscore_get());
}
static VALUE
rb_f_chomp(argc, argv)
int argc;
VALUE *argv;
{
VALUE str = uscore_get();
VALUE dup = rb_str_dup(str);
if (NIL_P(rb_str_chomp_bang(argc, argv, dup)))
return str;
rb_lastline_set(dup);
return dup;
}
static VALUE
rb_str_strip_bang(str)
VALUE str;
{
char *s, *t, *e;
rb_str_modify(str);
s = RSTRING(str)->ptr;
e = t = s + RSTRING(str)->len;
/* remove spaces at head */
while (s < t && ISSPACE(*s)) s++;
/* remove trailing spaces */
t--;
while (s <= t && ISSPACE(*t)) t--;
t++;
RSTRING(str)->len = t-s;
if (s > RSTRING(str)->ptr) {
char *p = RSTRING(str)->ptr;
RSTRING(str)->ptr = ALLOC_N(char, RSTRING(str)->len+1);
memcpy(RSTRING(str)->ptr, s, RSTRING(str)->len);
RSTRING(str)->ptr[RSTRING(str)->len] = '\0';
free(p);
}
else if (t < e) {
RSTRING(str)->ptr[RSTRING(str)->len] = '\0';
}
else {
return Qnil;
}
return str;
}
static VALUE
rb_str_strip(str)
VALUE str;
{
str = rb_str_dup(str);
rb_str_strip_bang(str);
return str;
}
static VALUE
scan_once(str, pat, start)
VALUE str, 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(match)->regs;
if (BEG(0) == END(0)) {
/*
* Always consume at least one character of the input string
*/
*start = END(0)+mbclen2(RSTRING(str)->ptr[END(0)],pat);
}
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;
}
static VALUE
rb_str_scan(str, pat)
VALUE str, pat;
{
VALUE result;
long start = 0;
VALUE match = Qnil;
pat = get_pat(pat);
if (!rb_block_given_p()) {
VALUE ary = rb_ary_new();
while (!NIL_P(result = scan_once(str, pat, &start))) {
match = rb_backref_get();
rb_ary_push(ary, result);
}
rb_backref_set(match);
return ary;
}
while (!NIL_P(result = scan_once(str, pat, &start))) {
match = rb_backref_get();
rb_match_busy(match);
rb_yield(result);
rb_backref_set(match); /* restore $~ value */
}
rb_backref_set(match);
return str;
}
static VALUE
rb_f_scan(self, pat)
VALUE self, pat;
{
return rb_str_scan(uscore_get(), pat);
}
static VALUE
rb_str_hex(str)
VALUE str;
{
return rb_str2inum(str, 16);
}
static VALUE
rb_str_oct(str)
VALUE str;
{
int base = 8;
if (RSTRING(str)->len > 2 && RSTRING(str)->ptr[0] == '0') {
switch (RSTRING(str)->ptr[1]) {
case 'x':
case 'X':
base = 16;
break;
case 'b':
case 'B':
base = 2;
break;
}
}
return rb_str2inum(str, base);
}
static VALUE
rb_str_crypt(str, salt)
VALUE str, salt;
{
extern char *crypt();
StringValue(salt);
if (RSTRING(salt)->len < 2)
rb_raise(rb_eArgError, "salt too short(need >=2 bytes)");
return rb_tainted_str_new2(crypt(RSTRING(str)->ptr, RSTRING(salt)->ptr));
}
static VALUE
rb_str_intern(str)
VALUE str;
{
ID id;
if (strlen(RSTRING(str)->ptr) != RSTRING(str)->len)
rb_raise(rb_eArgError, "string contains `\\0'");
id = rb_intern(RSTRING(str)->ptr);
return ID2SYM(id);
}
static VALUE
rb_str_sum(argc, argv, str)
int argc;
VALUE *argv;
VALUE str;
{
VALUE vbits;
int bits;
char *p, *pend;
if (rb_scan_args(argc, argv, "01", &vbits) == 0) {
bits = 16;
}
else bits = NUM2INT(vbits);
p = RSTRING(str)->ptr; pend = p + RSTRING(str)->len;
if (bits > sizeof(long)*CHAR_BIT) {
VALUE res = INT2FIX(0);
VALUE mod;
mod = rb_funcall(INT2FIX(1), rb_intern("<<"), 1, INT2FIX(bits));
mod = rb_funcall(mod, '-', 1, INT2FIX(1));
while (p < pend) {
res = rb_funcall(res, '+', 1, INT2FIX((unsigned int)*p));
p++;
}
res = rb_funcall(res, '&', 1, mod);
return res;
}
else {
unsigned int res = 0;
unsigned int mod = (1<<bits)-1;
if (mod == 0) {
mod = -1;
}
while (p < pend) {
res += (unsigned int)*p;
p++;
}
res &= mod;
return rb_int2inum(res);
}
}
static VALUE
rb_str_ljust(str, w)
VALUE str;
VALUE w;
{
long width = NUM2LONG(w);
VALUE res;
char *p, *pend;
if (width < 0 || RSTRING(str)->len >= width) return str;
res = rb_str_new(0, width);
memcpy(RSTRING(res)->ptr, RSTRING(str)->ptr, RSTRING(str)->len);
p = RSTRING(res)->ptr + RSTRING(str)->len; pend = RSTRING(res)->ptr + width;
while (p < pend) {
*p++ = ' ';
}
OBJ_INFECT(res, str);
return res;
}
static VALUE
rb_str_rjust(str, w)
VALUE str;
VALUE w;
{
long width = NUM2LONG(w);
VALUE res;
char *p, *pend;
if (width < 0 || RSTRING(str)->len >= width) return str;
res = rb_str_new(0, width);
p = RSTRING(res)->ptr; pend = p + width - RSTRING(str)->len;
while (p < pend) {
*p++ = ' ';
}
memcpy(pend, RSTRING(str)->ptr, RSTRING(str)->len);
OBJ_INFECT(res, str);
return res;
}
static VALUE
rb_str_center(str, w)
VALUE str;
VALUE w;
{
long width = NUM2LONG(w);
VALUE res;
char *p, *pend;
long n;
if (width < 0 || RSTRING(str)->len >= width) return str;
res = rb_str_new(0, width);
n = (width - RSTRING(str)->len)/2;
p = RSTRING(res)->ptr; pend = p + n;
while (p < pend) {
*p++ = ' ';
}
memcpy(pend, RSTRING(str)->ptr, RSTRING(str)->len);
p = pend + RSTRING(str)->len; pend = RSTRING(res)->ptr + width;
while (p < pend) {
*p++ = ' ';
}
OBJ_INFECT(res, str);
return res;
}
void
rb_str_setter(val, id, var)
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;
}
void
Init_String()
{
rb_cString = rb_define_class("String", rb_cObject);
rb_include_module(rb_cString, rb_mComparable);
rb_include_module(rb_cString, rb_mEnumerable);
rb_define_singleton_method(rb_cString, "new", rb_str_s_new, -1);
rb_define_method(rb_cString, "initialize", rb_str_replace, 1);
rb_define_method(rb_cString, "clone", rb_str_clone, 0);
rb_define_method(rb_cString, "dup", rb_str_dup, 0);
rb_define_method(rb_cString, "<=>", rb_str_cmp_m, 1);
rb_define_method(rb_cString, "==", rb_str_equal, 1);
rb_define_method(rb_cString, "===", rb_str_equal, 1);
rb_define_method(rb_cString, "eql?", rb_str_equal, 1);
rb_define_method(rb_cString, "hash", rb_str_hash_m, 0);
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, 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, "empty?", rb_str_empty, 0);
rb_define_method(rb_cString, "=~", rb_str_match, 1);
rb_define_method(rb_cString, "~", rb_str_match2, 0);
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_m, 1);
rb_define_method(rb_cString, "index", rb_str_index_m, -1);
rb_define_method(rb_cString, "rindex", rb_str_rindex, -1);
rb_define_method(rb_cString, "replace", rb_str_replace, 1);
rb_define_method(rb_cString, "to_i", rb_str_to_i, 0);
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, "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, "include?", rb_str_include, 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, "sub!", rb_str_sub_bang, -1);
rb_define_method(rb_cString, "gsub!", rb_str_gsub_bang, -1);
rb_define_method(rb_cString, "strip!", rb_str_strip_bang, 0);
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, "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", rb_str_each_line, -1);
rb_define_method(rb_cString, "each_byte", rb_str_each_byte, 0);
rb_define_method(rb_cString, "sum", rb_str_sum, -1);
rb_define_global_function("sub", rb_f_sub, -1);
rb_define_global_function("gsub", rb_f_gsub, -1);
rb_define_global_function("sub!", rb_f_sub_bang, -1);
rb_define_global_function("gsub!", rb_f_gsub_bang, -1);
rb_define_global_function("chop", rb_f_chop, 0);
rb_define_global_function("chop!", rb_f_chop_bang, 0);
rb_define_global_function("chomp", rb_f_chomp, -1);
rb_define_global_function("chomp!", rb_f_chomp_bang, -1);
rb_define_global_function("split", rb_f_split, -1);
rb_define_global_function("scan", rb_f_scan, 1);
rb_define_method(rb_cString, "slice", rb_str_aref_m, -1);
rb_define_method(rb_cString, "slice!", rb_str_slice_bang, -1);
id_to_s = rb_intern("to_s");
rb_fs = Qnil;
rb_define_hooked_variable("$;", &rb_fs, 0, rb_str_setter);
rb_define_hooked_variable("$-F", &rb_fs, 0, rb_str_setter);
}
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