зеркало из https://github.com/github/ruby.git
2016 строки
46 KiB
C
2016 строки
46 KiB
C
/* -*- mode: c; indent-tabs-mode: t -*- */
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/**********************************************************************
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stringio.c -
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$Author$
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$RoughId: stringio.c,v 1.13 2002/03/14 03:24:18 nobu Exp $
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created at: Tue Feb 19 04:10:38 JST 2002
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All the files in this distribution are covered under the Ruby's
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license (see the file COPYING).
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**********************************************************************/
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static const char *const
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STRINGIO_VERSION = "3.1.2.dev";
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#include <stdbool.h>
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#include "ruby.h"
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#include "ruby/io.h"
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#include "ruby/encoding.h"
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#if defined(HAVE_FCNTL_H) || defined(_WIN32)
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#include <fcntl.h>
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#elif defined(HAVE_SYS_FCNTL_H)
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#include <sys/fcntl.h>
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#endif
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#ifndef RB_INTEGER_TYPE_P
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# define RB_INTEGER_TYPE_P(c) (FIXNUM_P(c) || RB_TYPE_P(c, T_BIGNUM))
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#endif
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#ifndef RB_PASS_CALLED_KEYWORDS
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# define rb_funcallv_kw(recv, mid, arg, argv, kw_splat) rb_funcallv(recv, mid, arg, argv)
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# define rb_class_new_instance_kw(argc, argv, klass, kw_splat) rb_class_new_instance(argc, argv, klass)
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#endif
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struct StringIO {
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VALUE string;
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rb_encoding *enc;
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long pos;
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long lineno;
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int flags;
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int count;
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};
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static VALUE strio_init(int, VALUE *, struct StringIO *, VALUE);
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static VALUE strio_unget_bytes(struct StringIO *, const char *, long);
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static long strio_write(VALUE self, VALUE str);
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#define IS_STRIO(obj) (rb_typeddata_is_kind_of((obj), &strio_data_type))
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#define error_inval(msg) (rb_syserr_fail(EINVAL, msg))
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#define get_enc(ptr) ((ptr)->enc ? (ptr)->enc : !NIL_P((ptr)->string) ? rb_enc_get((ptr)->string) : NULL)
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static bool
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readonly_string_p(VALUE string)
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{
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return OBJ_FROZEN_RAW(string);
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}
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static struct StringIO *
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strio_alloc(void)
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{
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struct StringIO *ptr = ALLOC(struct StringIO);
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ptr->string = Qnil;
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ptr->pos = 0;
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ptr->lineno = 0;
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ptr->flags = 0;
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ptr->count = 1;
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return ptr;
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}
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static void
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strio_mark(void *p)
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{
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struct StringIO *ptr = p;
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rb_gc_mark(ptr->string);
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}
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static void
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strio_free(void *p)
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{
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struct StringIO *ptr = p;
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if (--ptr->count <= 0) {
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xfree(ptr);
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}
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}
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static size_t
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strio_memsize(const void *p)
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{
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return sizeof(struct StringIO);
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}
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static const rb_data_type_t strio_data_type = {
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"strio",
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{
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strio_mark,
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strio_free,
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strio_memsize,
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},
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0, 0, RUBY_TYPED_FREE_IMMEDIATELY | RUBY_TYPED_WB_PROTECTED
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};
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#define check_strio(self) ((struct StringIO*)rb_check_typeddata((self), &strio_data_type))
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static struct StringIO*
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get_strio(VALUE self)
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{
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struct StringIO *ptr = check_strio(rb_io_taint_check(self));
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if (!ptr) {
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rb_raise(rb_eIOError, "uninitialized stream");
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}
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return ptr;
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}
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static VALUE
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enc_subseq(VALUE str, long pos, long len, rb_encoding *enc)
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{
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str = rb_str_subseq(str, pos, len);
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rb_enc_associate(str, enc);
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return str;
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}
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static VALUE
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strio_substr(struct StringIO *ptr, long pos, long len, rb_encoding *enc)
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{
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VALUE str = ptr->string;
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long rlen = RSTRING_LEN(str) - pos;
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if (len > rlen) len = rlen;
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if (len < 0) len = 0;
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if (len == 0) return rb_enc_str_new(0, 0, enc);
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return enc_subseq(str, pos, len, enc);
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}
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#define StringIO(obj) get_strio(obj)
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#define STRIO_READABLE FL_USER4
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#define STRIO_WRITABLE FL_USER5
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#define STRIO_READWRITE (STRIO_READABLE|STRIO_WRITABLE)
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typedef char strio_flags_check[(STRIO_READABLE/FMODE_READABLE == STRIO_WRITABLE/FMODE_WRITABLE) * 2 - 1];
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#define STRIO_MODE_SET_P(strio, mode) \
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((RBASIC(strio)->flags & STRIO_##mode) && \
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((struct StringIO*)DATA_PTR(strio))->flags & FMODE_##mode)
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#define CLOSED(strio) (!STRIO_MODE_SET_P(strio, READWRITE))
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#define READABLE(strio) STRIO_MODE_SET_P(strio, READABLE)
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#define WRITABLE(strio) STRIO_MODE_SET_P(strio, WRITABLE)
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static VALUE sym_exception;
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static struct StringIO*
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readable(VALUE strio)
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{
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struct StringIO *ptr = StringIO(strio);
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if (!READABLE(strio)) {
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rb_raise(rb_eIOError, "not opened for reading");
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}
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return ptr;
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}
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static struct StringIO*
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writable(VALUE strio)
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{
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struct StringIO *ptr = StringIO(strio);
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if (!WRITABLE(strio)) {
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rb_raise(rb_eIOError, "not opened for writing");
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}
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return ptr;
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}
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static void
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check_modifiable(struct StringIO *ptr)
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{
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if (NIL_P(ptr->string)) {
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/* Null device StringIO */
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}
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else if (OBJ_FROZEN_RAW(ptr->string)) {
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rb_raise(rb_eIOError, "not modifiable string");
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}
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}
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static VALUE
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strio_s_allocate(VALUE klass)
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{
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return TypedData_Wrap_Struct(klass, &strio_data_type, 0);
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}
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/*
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* call-seq:
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* StringIO.new(string = '', mode = 'r+') -> new_stringio
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*
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* Note that +mode+ defaults to <tt>'r'</tt> if +string+ is frozen.
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*
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* Returns a new \StringIO instance formed from +string+ and +mode+;
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* see {Access Modes}[rdoc-ref:File@Access+Modes]:
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*
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* strio = StringIO.new # => #<StringIO>
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* strio.close
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*
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* The instance should be closed when no longer needed.
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*
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* Related: StringIO.open (accepts block; closes automatically).
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*/
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static VALUE
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strio_initialize(int argc, VALUE *argv, VALUE self)
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{
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struct StringIO *ptr = check_strio(self);
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if (!ptr) {
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DATA_PTR(self) = ptr = strio_alloc();
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}
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rb_call_super(0, 0);
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return strio_init(argc, argv, ptr, self);
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}
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static int
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detect_bom(VALUE str, int *bomlen)
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{
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const char *p;
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long len;
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RSTRING_GETMEM(str, p, len);
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if (len < 1) return 0;
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switch ((unsigned char)p[0]) {
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case 0xEF:
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if (len < 2) break;
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if ((unsigned char)p[1] == 0xBB && len > 2) {
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if ((unsigned char)p[2] == 0xBF) {
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*bomlen = 3;
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return rb_utf8_encindex();
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}
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}
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break;
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case 0xFE:
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if (len < 2) break;
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if ((unsigned char)p[1] == 0xFF) {
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*bomlen = 2;
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return rb_enc_find_index("UTF-16BE");
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}
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break;
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case 0xFF:
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if (len < 2) break;
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if ((unsigned char)p[1] == 0xFE) {
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if (len >= 4 && (unsigned char)p[2] == 0 && (unsigned char)p[3] == 0) {
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*bomlen = 4;
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return rb_enc_find_index("UTF-32LE");
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}
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*bomlen = 2;
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return rb_enc_find_index("UTF-16LE");
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}
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break;
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case 0:
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if (len < 4) break;
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if ((unsigned char)p[1] == 0 && (unsigned char)p[2] == 0xFE && (unsigned char)p[3] == 0xFF) {
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*bomlen = 4;
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return rb_enc_find_index("UTF-32BE");
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}
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break;
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}
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return 0;
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}
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static rb_encoding *
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set_encoding_by_bom(struct StringIO *ptr)
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{
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int bomlen, idx = detect_bom(ptr->string, &bomlen);
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rb_encoding *extenc = NULL;
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if (idx) {
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extenc = rb_enc_from_index(idx);
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ptr->pos = bomlen;
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if (ptr->flags & FMODE_WRITABLE) {
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rb_enc_associate_index(ptr->string, idx);
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}
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}
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ptr->enc = extenc;
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return extenc;
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}
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static VALUE
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strio_init(int argc, VALUE *argv, struct StringIO *ptr, VALUE self)
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{
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VALUE string, vmode, opt;
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int oflags;
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rb_io_enc_t convconfig;
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argc = rb_scan_args(argc, argv, "02:", &string, &vmode, &opt);
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rb_io_extract_modeenc(&vmode, 0, opt, &oflags, &ptr->flags, &convconfig);
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if (!NIL_P(string)) {
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StringValue(string);
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}
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else if (!argc) {
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string = rb_enc_str_new("", 0, rb_default_external_encoding());
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}
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if (!NIL_P(string) && readonly_string_p(string)) {
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if (ptr->flags & FMODE_WRITABLE) {
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rb_syserr_fail(EACCES, 0);
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}
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}
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else {
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if (NIL_P(vmode)) {
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ptr->flags |= FMODE_WRITABLE;
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}
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}
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if (!NIL_P(string) && (ptr->flags & FMODE_TRUNC)) {
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rb_str_resize(string, 0);
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}
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RB_OBJ_WRITE(self, &ptr->string, string);
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if (argc == 1 && !NIL_P(string)) {
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ptr->enc = rb_enc_get(string);
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}
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else {
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ptr->enc = convconfig.enc;
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}
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ptr->pos = 0;
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ptr->lineno = 0;
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if (ptr->flags & FMODE_SETENC_BY_BOM) set_encoding_by_bom(ptr);
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RBASIC(self)->flags |= (ptr->flags & FMODE_READWRITE) * (STRIO_READABLE / FMODE_READABLE);
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return self;
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}
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static VALUE
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strio_finalize(VALUE self)
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{
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struct StringIO *ptr = StringIO(self);
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RB_OBJ_WRITE(self, &ptr->string, Qnil);
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ptr->flags &= ~FMODE_READWRITE;
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return self;
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}
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/*
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* call-seq:
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* StringIO.open(string = '', mode = 'r+') {|strio| ... }
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*
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* Note that +mode+ defaults to <tt>'r'</tt> if +string+ is frozen.
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*
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* Creates a new \StringIO instance formed from +string+ and +mode+;
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* see {Access Modes}[rdoc-ref:File@Access+Modes].
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*
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* With no block, returns the new instance:
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*
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* strio = StringIO.open # => #<StringIO>
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*
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* With a block, calls the block with the new instance
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* and returns the block's value;
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* closes the instance on block exit.
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*
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* StringIO.open {|strio| p strio }
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* # => #<StringIO>
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*
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* Related: StringIO.new.
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*/
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static VALUE
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strio_s_open(int argc, VALUE *argv, VALUE klass)
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{
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VALUE obj = rb_class_new_instance_kw(argc, argv, klass, RB_PASS_CALLED_KEYWORDS);
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if (!rb_block_given_p()) return obj;
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return rb_ensure(rb_yield, obj, strio_finalize, obj);
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}
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/* :nodoc: */
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static VALUE
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strio_s_new(int argc, VALUE *argv, VALUE klass)
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{
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if (rb_block_given_p()) {
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VALUE cname = rb_obj_as_string(klass);
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rb_warn("%"PRIsVALUE"::new() does not take block; use %"PRIsVALUE"::open() instead",
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cname, cname);
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}
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return rb_class_new_instance_kw(argc, argv, klass, RB_PASS_CALLED_KEYWORDS);
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}
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/*
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* Returns +false+. Just for compatibility to IO.
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*/
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static VALUE
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strio_false(VALUE self)
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{
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StringIO(self);
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return Qfalse;
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}
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/*
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* Returns +nil+. Just for compatibility to IO.
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*/
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static VALUE
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strio_nil(VALUE self)
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{
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StringIO(self);
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return Qnil;
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}
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/*
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* Returns an object itself. Just for compatibility to IO.
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*/
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static VALUE
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strio_self(VALUE self)
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{
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StringIO(self);
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return self;
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}
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/*
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* Returns 0. Just for compatibility to IO.
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*/
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static VALUE
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strio_0(VALUE self)
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{
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StringIO(self);
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return INT2FIX(0);
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}
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/*
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* Returns the argument unchanged. Just for compatibility to IO.
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*/
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static VALUE
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strio_first(VALUE self, VALUE arg)
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{
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StringIO(self);
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return arg;
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}
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/*
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* Raises NotImplementedError.
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*/
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static VALUE
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strio_unimpl(int argc, VALUE *argv, VALUE self)
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{
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StringIO(self);
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rb_notimplement();
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UNREACHABLE;
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}
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/*
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* call-seq:
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* string -> string
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*
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* Returns underlying string:
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*
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* StringIO.open('foo') do |strio|
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* p strio.string
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* strio.string = 'bar'
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* p strio.string
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* end
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*
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* Output:
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*
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* "foo"
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* "bar"
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*
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* Related: StringIO#string= (assigns the underlying string).
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*/
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static VALUE
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strio_get_string(VALUE self)
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{
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return StringIO(self)->string;
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}
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/*
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* call-seq:
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* string = other_string -> other_string
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*
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* Assigns the underlying string as +other_string+, and sets position to zero;
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* returns +other_string+:
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*
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* StringIO.open('foo') do |strio|
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* p strio.string
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* strio.string = 'bar'
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* p strio.string
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* end
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*
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* Output:
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*
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* "foo"
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* "bar"
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*
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* Related: StringIO#string (returns the underlying string).
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*/
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static VALUE
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strio_set_string(VALUE self, VALUE string)
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{
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struct StringIO *ptr = StringIO(self);
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rb_io_taint_check(self);
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ptr->flags &= ~FMODE_READWRITE;
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StringValue(string);
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ptr->flags = readonly_string_p(string) ? FMODE_READABLE : FMODE_READWRITE;
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ptr->pos = 0;
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ptr->lineno = 0;
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RB_OBJ_WRITE(self, &ptr->string, string);
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return string;
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}
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/*
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* call-seq:
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* close -> nil
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*
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* Closes +self+ for both reading and writing.
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*
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* Raises IOError if reading or writing is attempted.
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*
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* Related: StringIO#close_read, StringIO#close_write.
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*/
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static VALUE
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strio_close(VALUE self)
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{
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StringIO(self);
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RBASIC(self)->flags &= ~STRIO_READWRITE;
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return Qnil;
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}
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/*
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* call-seq:
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* close_read -> nil
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*
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* Closes +self+ for reading; closed-write setting remains unchanged.
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*
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* Raises IOError if reading is attempted.
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*
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* Related: StringIO#close, StringIO#close_write.
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*/
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static VALUE
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strio_close_read(VALUE self)
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{
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struct StringIO *ptr = StringIO(self);
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if (!(ptr->flags & FMODE_READABLE)) {
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rb_raise(rb_eIOError, "closing non-duplex IO for reading");
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}
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RBASIC(self)->flags &= ~STRIO_READABLE;
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return Qnil;
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}
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/*
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* call-seq:
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* close_write -> nil
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*
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* Closes +self+ for writing; closed-read setting remains unchanged.
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*
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* Raises IOError if writing is attempted.
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*
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* Related: StringIO#close, StringIO#close_read.
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*/
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|
static VALUE
|
|
strio_close_write(VALUE self)
|
|
{
|
|
struct StringIO *ptr = StringIO(self);
|
|
if (!(ptr->flags & FMODE_WRITABLE)) {
|
|
rb_raise(rb_eIOError, "closing non-duplex IO for writing");
|
|
}
|
|
RBASIC(self)->flags &= ~STRIO_WRITABLE;
|
|
return Qnil;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* closed? -> true or false
|
|
*
|
|
* Returns +true+ if +self+ is closed for both reading and writing,
|
|
* +false+ otherwise.
|
|
*/
|
|
static VALUE
|
|
strio_closed(VALUE self)
|
|
{
|
|
StringIO(self);
|
|
if (!CLOSED(self)) return Qfalse;
|
|
return Qtrue;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* closed_read? -> true or false
|
|
*
|
|
* Returns +true+ if +self+ is closed for reading, +false+ otherwise.
|
|
*/
|
|
static VALUE
|
|
strio_closed_read(VALUE self)
|
|
{
|
|
StringIO(self);
|
|
if (READABLE(self)) return Qfalse;
|
|
return Qtrue;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* closed_write? -> true or false
|
|
*
|
|
* Returns +true+ if +self+ is closed for writing, +false+ otherwise.
|
|
*/
|
|
static VALUE
|
|
strio_closed_write(VALUE self)
|
|
{
|
|
StringIO(self);
|
|
if (WRITABLE(self)) return Qfalse;
|
|
return Qtrue;
|
|
}
|
|
|
|
static struct StringIO *
|
|
strio_to_read(VALUE self)
|
|
{
|
|
struct StringIO *ptr = readable(self);
|
|
if (NIL_P(ptr->string)) return NULL;
|
|
if (ptr->pos < RSTRING_LEN(ptr->string)) return ptr;
|
|
return NULL;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* eof? -> true or false
|
|
*
|
|
* Returns +true+ if positioned at end-of-stream, +false+ otherwise;
|
|
* see {Position}[rdoc-ref:IO@Position].
|
|
*
|
|
* Raises IOError if the stream is not opened for reading.
|
|
*/
|
|
static VALUE
|
|
strio_eof(VALUE self)
|
|
{
|
|
if (strio_to_read(self)) return Qfalse;
|
|
return Qtrue;
|
|
}
|
|
|
|
/* :nodoc: */
|
|
static VALUE
|
|
strio_copy(VALUE copy, VALUE orig)
|
|
{
|
|
struct StringIO *ptr, *old_ptr;
|
|
VALUE old_string = Qundef;
|
|
|
|
orig = rb_convert_type(orig, T_DATA, "StringIO", "to_strio");
|
|
if (copy == orig) return copy;
|
|
ptr = StringIO(orig);
|
|
old_ptr = check_strio(copy);
|
|
if (old_ptr) {
|
|
old_string = old_ptr->string;
|
|
strio_free(old_ptr);
|
|
}
|
|
DATA_PTR(copy) = ptr;
|
|
RB_OBJ_WRITTEN(copy, old_string, ptr->string);
|
|
RBASIC(copy)->flags &= ~STRIO_READWRITE;
|
|
RBASIC(copy)->flags |= RBASIC(orig)->flags & STRIO_READWRITE;
|
|
++ptr->count;
|
|
return copy;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* lineno -> current_line_number
|
|
*
|
|
* Returns the current line number in +self+;
|
|
* see {Line Number}[rdoc-ref:IO@Line+Number].
|
|
*/
|
|
static VALUE
|
|
strio_get_lineno(VALUE self)
|
|
{
|
|
return LONG2NUM(StringIO(self)->lineno);
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* lineno = new_line_number -> new_line_number
|
|
*
|
|
* Sets the current line number in +self+ to the given +new_line_number+;
|
|
* see {Line Number}[rdoc-ref:IO@Line+Number].
|
|
*/
|
|
static VALUE
|
|
strio_set_lineno(VALUE self, VALUE lineno)
|
|
{
|
|
StringIO(self)->lineno = NUM2LONG(lineno);
|
|
return lineno;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* binmode -> self
|
|
*
|
|
* Sets the data mode in +self+ to binary mode;
|
|
* see {Data Mode}[rdoc-ref:File@Data+Mode].
|
|
*
|
|
*/
|
|
static VALUE
|
|
strio_binmode(VALUE self)
|
|
{
|
|
struct StringIO *ptr = StringIO(self);
|
|
rb_encoding *enc = rb_ascii8bit_encoding();
|
|
|
|
ptr->enc = enc;
|
|
if (WRITABLE(self)) {
|
|
rb_enc_associate(ptr->string, enc);
|
|
}
|
|
return self;
|
|
}
|
|
|
|
#define strio_fcntl strio_unimpl
|
|
|
|
#define strio_flush strio_self
|
|
|
|
#define strio_fsync strio_0
|
|
|
|
/*
|
|
* call-seq:
|
|
* reopen(other, mode = 'r+') -> self
|
|
*
|
|
* Reinitializes the stream with the given +other+ (string or StringIO) and +mode+;
|
|
* see IO.new:
|
|
*
|
|
* StringIO.open('foo') do |strio|
|
|
* p strio.string
|
|
* strio.reopen('bar')
|
|
* p strio.string
|
|
* other_strio = StringIO.new('baz')
|
|
* strio.reopen(other_strio)
|
|
* p strio.string
|
|
* other_strio.close
|
|
* end
|
|
*
|
|
* Output:
|
|
*
|
|
* "foo"
|
|
* "bar"
|
|
* "baz"
|
|
*
|
|
*/
|
|
static VALUE
|
|
strio_reopen(int argc, VALUE *argv, VALUE self)
|
|
{
|
|
rb_io_taint_check(self);
|
|
if (argc == 1 && !RB_TYPE_P(*argv, T_STRING)) {
|
|
return strio_copy(self, *argv);
|
|
}
|
|
return strio_init(argc, argv, StringIO(self), self);
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* pos -> stream_position
|
|
*
|
|
* Returns the current position (in bytes);
|
|
* see {Position}[rdoc-ref:IO@Position].
|
|
*/
|
|
static VALUE
|
|
strio_get_pos(VALUE self)
|
|
{
|
|
return LONG2NUM(StringIO(self)->pos);
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* pos = new_position -> new_position
|
|
*
|
|
* Sets the current position (in bytes);
|
|
* see {Position}[rdoc-ref:IO@Position].
|
|
*/
|
|
static VALUE
|
|
strio_set_pos(VALUE self, VALUE pos)
|
|
{
|
|
struct StringIO *ptr = StringIO(self);
|
|
long p = NUM2LONG(pos);
|
|
if (p < 0) {
|
|
error_inval(0);
|
|
}
|
|
ptr->pos = p;
|
|
return pos;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* rewind -> 0
|
|
*
|
|
* Sets the current position and line number to zero;
|
|
* see {Position}[rdoc-ref:IO@Position]
|
|
* and {Line Number}[rdoc-ref:IO@Line+Number].
|
|
*/
|
|
static VALUE
|
|
strio_rewind(VALUE self)
|
|
{
|
|
struct StringIO *ptr = StringIO(self);
|
|
ptr->pos = 0;
|
|
ptr->lineno = 0;
|
|
return INT2FIX(0);
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* seek(offset, whence = SEEK_SET) -> 0
|
|
*
|
|
* Sets the current position to the given integer +offset+ (in bytes),
|
|
* with respect to a given constant +whence+;
|
|
* see {Position}[rdoc-ref:IO@Position].
|
|
*/
|
|
static VALUE
|
|
strio_seek(int argc, VALUE *argv, VALUE self)
|
|
{
|
|
VALUE whence;
|
|
struct StringIO *ptr = StringIO(self);
|
|
long amount, offset;
|
|
|
|
rb_scan_args(argc, argv, "11", NULL, &whence);
|
|
amount = NUM2LONG(argv[0]);
|
|
if (CLOSED(self)) {
|
|
rb_raise(rb_eIOError, "closed stream");
|
|
}
|
|
switch (NIL_P(whence) ? 0 : NUM2LONG(whence)) {
|
|
case 0:
|
|
offset = 0;
|
|
break;
|
|
case 1:
|
|
offset = ptr->pos;
|
|
break;
|
|
case 2:
|
|
offset = RSTRING_LEN(ptr->string);
|
|
break;
|
|
default:
|
|
error_inval("invalid whence");
|
|
}
|
|
if (amount > LONG_MAX - offset || amount + offset < 0) {
|
|
error_inval(0);
|
|
}
|
|
ptr->pos = amount + offset;
|
|
return INT2FIX(0);
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* sync -> true
|
|
*
|
|
* Returns +true+; implemented only for compatibility with other stream classes.
|
|
*/
|
|
static VALUE
|
|
strio_get_sync(VALUE self)
|
|
{
|
|
StringIO(self);
|
|
return Qtrue;
|
|
}
|
|
|
|
#define strio_set_sync strio_first
|
|
|
|
#define strio_tell strio_get_pos
|
|
|
|
/*
|
|
* call-seq:
|
|
* each_byte {|byte| ... } -> self
|
|
*
|
|
* With a block given, calls the block with each remaining byte in the stream;
|
|
* see {Byte IO}[rdoc-ref:IO@Byte+IO].
|
|
*
|
|
* With no block given, returns an enumerator.
|
|
*/
|
|
static VALUE
|
|
strio_each_byte(VALUE self)
|
|
{
|
|
struct StringIO *ptr;
|
|
|
|
RETURN_ENUMERATOR(self, 0, 0);
|
|
|
|
while ((ptr = strio_to_read(self)) != NULL) {
|
|
char c = RSTRING_PTR(ptr->string)[ptr->pos++];
|
|
rb_yield(CHR2FIX(c));
|
|
}
|
|
return self;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* getc -> character or nil
|
|
*
|
|
* Reads and returns the next character from the stream;
|
|
* see {Character IO}[rdoc-ref:IO@Character+IO].
|
|
*/
|
|
static VALUE
|
|
strio_getc(VALUE self)
|
|
{
|
|
struct StringIO *ptr = readable(self);
|
|
rb_encoding *enc = get_enc(ptr);
|
|
VALUE str = ptr->string;
|
|
long pos = ptr->pos;
|
|
int len;
|
|
char *p;
|
|
|
|
if (NIL_P(str) || pos >= RSTRING_LEN(str)) {
|
|
return Qnil;
|
|
}
|
|
p = RSTRING_PTR(str)+pos;
|
|
len = rb_enc_mbclen(p, RSTRING_END(str), enc);
|
|
ptr->pos += len;
|
|
return enc_subseq(str, pos, len, enc);
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* getbyte -> byte or nil
|
|
*
|
|
* Reads and returns the next 8-bit byte from the stream;
|
|
* see {Byte IO}[rdoc-ref:IO@Byte+IO].
|
|
*/
|
|
static VALUE
|
|
strio_getbyte(VALUE self)
|
|
{
|
|
struct StringIO *ptr = readable(self);
|
|
int c;
|
|
if (NIL_P(ptr->string) || ptr->pos >= RSTRING_LEN(ptr->string)) {
|
|
return Qnil;
|
|
}
|
|
c = RSTRING_PTR(ptr->string)[ptr->pos++];
|
|
return CHR2FIX(c);
|
|
}
|
|
|
|
static void
|
|
strio_extend(struct StringIO *ptr, long pos, long len)
|
|
{
|
|
long olen;
|
|
|
|
if (len > LONG_MAX - pos)
|
|
rb_raise(rb_eArgError, "string size too big");
|
|
|
|
check_modifiable(ptr);
|
|
olen = RSTRING_LEN(ptr->string);
|
|
if (pos + len > olen) {
|
|
rb_str_resize(ptr->string, pos + len);
|
|
if (pos > olen)
|
|
MEMZERO(RSTRING_PTR(ptr->string) + olen, char, pos - olen);
|
|
}
|
|
}
|
|
|
|
static void
|
|
strio_unget_string(struct StringIO *ptr, VALUE c)
|
|
{
|
|
const char *cp = NULL;
|
|
long cl = RSTRING_LEN(c);
|
|
if (cl > 0) {
|
|
if (c != ptr->string) cp = RSTRING_PTR(c);
|
|
strio_unget_bytes(ptr, cp, cl);
|
|
RB_GC_GUARD(c);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* ungetc(character) -> nil
|
|
*
|
|
* Pushes back ("unshifts") a character or integer onto the stream;
|
|
* see {Character IO}[rdoc-ref:IO@Character+IO].
|
|
*/
|
|
static VALUE
|
|
strio_ungetc(VALUE self, VALUE c)
|
|
{
|
|
struct StringIO *ptr = readable(self);
|
|
rb_encoding *enc, *enc2;
|
|
|
|
check_modifiable(ptr);
|
|
if (NIL_P(ptr->string)) return Qnil;
|
|
if (NIL_P(c)) return Qnil;
|
|
if (RB_INTEGER_TYPE_P(c)) {
|
|
int len, cc = NUM2INT(c);
|
|
char buf[16];
|
|
|
|
enc = rb_enc_get(ptr->string);
|
|
len = rb_enc_codelen(cc, enc);
|
|
if (len <= 0) {
|
|
rb_enc_uint_chr(cc, enc); /* to raise an exception */
|
|
UNREACHABLE;
|
|
}
|
|
rb_enc_mbcput(cc, buf, enc);
|
|
return strio_unget_bytes(ptr, buf, len);
|
|
}
|
|
else {
|
|
StringValue(c);
|
|
if (RSTRING_LEN(c) == 0) return Qnil;
|
|
enc = rb_enc_get(ptr->string);
|
|
enc2 = rb_enc_get(c);
|
|
if (enc != enc2 && enc != rb_ascii8bit_encoding()) {
|
|
c = rb_str_conv_enc(c, enc2, enc);
|
|
}
|
|
strio_unget_string(ptr, c);
|
|
return Qnil;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* ungetbyte(byte) -> nil
|
|
*
|
|
* Pushes back ("unshifts") an 8-bit byte onto the stream;
|
|
* see {Byte IO}[rdoc-ref:IO@Byte+IO].
|
|
*/
|
|
static VALUE
|
|
strio_ungetbyte(VALUE self, VALUE c)
|
|
{
|
|
struct StringIO *ptr = readable(self);
|
|
|
|
check_modifiable(ptr);
|
|
if (NIL_P(ptr->string)) return Qnil;
|
|
if (NIL_P(c)) return Qnil;
|
|
if (RB_INTEGER_TYPE_P(c)) {
|
|
/* rb_int_and() not visible from exts */
|
|
VALUE v = rb_funcall(c, '&', 1, INT2FIX(0xff));
|
|
const char cc = NUM2INT(v) & 0xFF;
|
|
strio_unget_bytes(ptr, &cc, 1);
|
|
}
|
|
else {
|
|
StringValue(c);
|
|
strio_unget_string(ptr, c);
|
|
}
|
|
return Qnil;
|
|
}
|
|
|
|
static VALUE
|
|
strio_unget_bytes(struct StringIO *ptr, const char *cp, long cl)
|
|
{
|
|
long pos = ptr->pos, len, rest;
|
|
VALUE str = ptr->string;
|
|
char *s;
|
|
|
|
len = RSTRING_LEN(str);
|
|
rest = pos - len;
|
|
if (cl > pos) {
|
|
long ex = cl - (rest < 0 ? pos : len);
|
|
rb_str_modify_expand(str, ex);
|
|
rb_str_set_len(str, len + ex);
|
|
s = RSTRING_PTR(str);
|
|
if (rest < 0) memmove(s + cl, s + pos, -rest);
|
|
pos = 0;
|
|
}
|
|
else {
|
|
if (rest > 0) {
|
|
rb_str_modify_expand(str, rest);
|
|
rb_str_set_len(str, len + rest);
|
|
}
|
|
s = RSTRING_PTR(str);
|
|
if (rest > cl) memset(s + len, 0, rest - cl);
|
|
pos -= cl;
|
|
}
|
|
memcpy(s + pos, (cp ? cp : s), cl);
|
|
ptr->pos = pos;
|
|
return Qnil;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* readchar -> string
|
|
*
|
|
* Like +getc+, but raises an exception if already at end-of-stream;
|
|
* see {Character IO}[rdoc-ref:IO@Character+IO].
|
|
*/
|
|
static VALUE
|
|
strio_readchar(VALUE self)
|
|
{
|
|
VALUE c = rb_funcallv(self, rb_intern("getc"), 0, 0);
|
|
if (NIL_P(c)) rb_eof_error();
|
|
return c;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* readbyte -> byte
|
|
*
|
|
* Like +getbyte+, but raises an exception if already at end-of-stream;
|
|
* see {Byte IO}[rdoc-ref:IO@Byte+IO].
|
|
*/
|
|
static VALUE
|
|
strio_readbyte(VALUE self)
|
|
{
|
|
VALUE c = rb_funcallv(self, rb_intern("getbyte"), 0, 0);
|
|
if (NIL_P(c)) rb_eof_error();
|
|
return c;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* each_char {|c| ... } -> self
|
|
*
|
|
* With a block given, calls the block with each remaining character in the stream;
|
|
* see {Character IO}[rdoc-ref:IO@Character+IO].
|
|
*
|
|
* With no block given, returns an enumerator.
|
|
*/
|
|
static VALUE
|
|
strio_each_char(VALUE self)
|
|
{
|
|
VALUE c;
|
|
|
|
RETURN_ENUMERATOR(self, 0, 0);
|
|
|
|
while (!NIL_P(c = strio_getc(self))) {
|
|
rb_yield(c);
|
|
}
|
|
return self;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* each_codepoint {|codepoint| ... } -> self
|
|
*
|
|
* With a block given, calls the block with each remaining codepoint in the stream;
|
|
* see {Codepoint IO}[rdoc-ref:IO@Codepoint+IO].
|
|
*
|
|
* With no block given, returns an enumerator.
|
|
*/
|
|
static VALUE
|
|
strio_each_codepoint(VALUE self)
|
|
{
|
|
struct StringIO *ptr;
|
|
rb_encoding *enc;
|
|
unsigned int c;
|
|
int n;
|
|
|
|
RETURN_ENUMERATOR(self, 0, 0);
|
|
|
|
ptr = readable(self);
|
|
enc = get_enc(ptr);
|
|
while ((ptr = strio_to_read(self)) != NULL) {
|
|
c = rb_enc_codepoint_len(RSTRING_PTR(ptr->string)+ptr->pos,
|
|
RSTRING_END(ptr->string), &n, enc);
|
|
ptr->pos += n;
|
|
rb_yield(UINT2NUM(c));
|
|
}
|
|
return self;
|
|
}
|
|
|
|
/* Boyer-Moore search: copied from regex.c */
|
|
static void
|
|
bm_init_skip(long *skip, const char *pat, long m)
|
|
{
|
|
int c;
|
|
|
|
for (c = 0; c < (1 << CHAR_BIT); c++) {
|
|
skip[c] = m;
|
|
}
|
|
while (--m) {
|
|
skip[(unsigned char)*pat++] = m;
|
|
}
|
|
}
|
|
|
|
static long
|
|
bm_search(const char *little, long llen, const char *big, long blen, const long *skip)
|
|
{
|
|
long i, j, k;
|
|
|
|
i = llen - 1;
|
|
while (i < blen) {
|
|
k = i;
|
|
j = llen - 1;
|
|
while (j >= 0 && big[k] == little[j]) {
|
|
k--;
|
|
j--;
|
|
}
|
|
if (j < 0) return k + 1;
|
|
i += skip[(unsigned char)big[i]];
|
|
}
|
|
return -1;
|
|
}
|
|
|
|
struct getline_arg {
|
|
VALUE rs;
|
|
long limit;
|
|
unsigned int chomp: 1;
|
|
};
|
|
|
|
static struct getline_arg *
|
|
prepare_getline_args(struct StringIO *ptr, struct getline_arg *arg, int argc, VALUE *argv)
|
|
{
|
|
VALUE rs, lim, opts;
|
|
long limit = -1;
|
|
int respect_chomp;
|
|
|
|
argc = rb_scan_args(argc, argv, "02:", &rs, &lim, &opts);
|
|
respect_chomp = argc == 0 || !NIL_P(rs);
|
|
switch (argc) {
|
|
case 0:
|
|
rs = rb_rs;
|
|
break;
|
|
|
|
case 1:
|
|
if (!NIL_P(rs) && !RB_TYPE_P(rs, T_STRING)) {
|
|
VALUE tmp = rb_check_string_type(rs);
|
|
if (NIL_P(tmp)) {
|
|
limit = NUM2LONG(rs);
|
|
rs = rb_rs;
|
|
}
|
|
else {
|
|
rs = tmp;
|
|
}
|
|
}
|
|
break;
|
|
|
|
case 2:
|
|
if (!NIL_P(rs)) StringValue(rs);
|
|
if (!NIL_P(lim)) limit = NUM2LONG(lim);
|
|
break;
|
|
}
|
|
if (!NIL_P(ptr->string) && !NIL_P(rs)) {
|
|
rb_encoding *enc_rs, *enc_io;
|
|
enc_rs = rb_enc_get(rs);
|
|
enc_io = get_enc(ptr);
|
|
if (enc_rs != enc_io &&
|
|
(rb_enc_str_coderange(rs) != ENC_CODERANGE_7BIT ||
|
|
(RSTRING_LEN(rs) > 0 && !rb_enc_asciicompat(enc_io)))) {
|
|
if (rs == rb_rs) {
|
|
rs = rb_enc_str_new(0, 0, enc_io);
|
|
rb_str_buf_cat_ascii(rs, "\n");
|
|
rs = rs;
|
|
}
|
|
else {
|
|
rb_raise(rb_eArgError, "encoding mismatch: %s IO with %s RS",
|
|
rb_enc_name(enc_io),
|
|
rb_enc_name(enc_rs));
|
|
}
|
|
}
|
|
}
|
|
arg->rs = rs;
|
|
arg->limit = limit;
|
|
arg->chomp = 0;
|
|
if (!NIL_P(opts)) {
|
|
static ID keywords[1];
|
|
VALUE vchomp;
|
|
if (!keywords[0]) {
|
|
keywords[0] = rb_intern_const("chomp");
|
|
}
|
|
rb_get_kwargs(opts, keywords, 0, 1, &vchomp);
|
|
if (respect_chomp) {
|
|
arg->chomp = (vchomp != Qundef) && RTEST(vchomp);
|
|
}
|
|
}
|
|
return arg;
|
|
}
|
|
|
|
static inline int
|
|
chomp_newline_width(const char *s, const char *e)
|
|
{
|
|
if (e > s && *--e == '\n') {
|
|
if (e > s && *--e == '\r') return 2;
|
|
return 1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static VALUE
|
|
strio_getline(struct getline_arg *arg, struct StringIO *ptr)
|
|
{
|
|
const char *s, *e, *p;
|
|
long n, limit = arg->limit;
|
|
VALUE str = arg->rs;
|
|
long w = 0;
|
|
rb_encoding *enc = get_enc(ptr);
|
|
|
|
if (NIL_P(ptr->string) || ptr->pos >= (n = RSTRING_LEN(ptr->string))) {
|
|
return Qnil;
|
|
}
|
|
s = RSTRING_PTR(ptr->string);
|
|
e = s + RSTRING_LEN(ptr->string);
|
|
s += ptr->pos;
|
|
if (limit > 0 && (size_t)limit < (size_t)(e - s)) {
|
|
e = rb_enc_right_char_head(s, s + limit, e, get_enc(ptr));
|
|
}
|
|
if (NIL_P(str)) {
|
|
if (arg->chomp) {
|
|
w = chomp_newline_width(s, e);
|
|
}
|
|
str = strio_substr(ptr, ptr->pos, e - s - w, enc);
|
|
}
|
|
else if ((n = RSTRING_LEN(str)) == 0) {
|
|
const char *paragraph_end = NULL;
|
|
p = s;
|
|
while (p[(p + 1 < e) && (*p == '\r') && 0] == '\n') {
|
|
p += *p == '\r';
|
|
if (++p == e) {
|
|
return Qnil;
|
|
}
|
|
}
|
|
s = p;
|
|
while ((p = memchr(p, '\n', e - p)) && (p != e)) {
|
|
p++;
|
|
if (!((p < e && *p == '\n') ||
|
|
(p + 1 < e && *p == '\r' && *(p+1) == '\n'))) {
|
|
continue;
|
|
}
|
|
paragraph_end = p - ((*(p-2) == '\r') ? 2 : 1);
|
|
while ((p < e && *p == '\n') ||
|
|
(p + 1 < e && *p == '\r' && *(p+1) == '\n')) {
|
|
p += (*p == '\r') ? 2 : 1;
|
|
}
|
|
e = p;
|
|
break;
|
|
}
|
|
if (arg->chomp && paragraph_end) {
|
|
w = e - paragraph_end;
|
|
}
|
|
str = strio_substr(ptr, s - RSTRING_PTR(ptr->string), e - s - w, enc);
|
|
}
|
|
else if (n == 1) {
|
|
if ((p = memchr(s, RSTRING_PTR(str)[0], e - s)) != 0) {
|
|
e = p + 1;
|
|
w = (arg->chomp ? (p > s && *(p-1) == '\r') + 1 : 0);
|
|
}
|
|
str = strio_substr(ptr, ptr->pos, e - s - w, enc);
|
|
}
|
|
else {
|
|
if (n < e - s + arg->chomp) {
|
|
/* unless chomping, RS at the end does not matter */
|
|
if (e - s < 1024 || n == e - s) {
|
|
for (p = s; p + n <= e; ++p) {
|
|
if (MEMCMP(p, RSTRING_PTR(str), char, n) == 0) {
|
|
e = p + n;
|
|
w = (arg->chomp ? n : 0);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
else {
|
|
long skip[1 << CHAR_BIT], pos;
|
|
p = RSTRING_PTR(str);
|
|
bm_init_skip(skip, p, n);
|
|
if ((pos = bm_search(p, n, s, e - s, skip)) >= 0) {
|
|
e = s + pos + (arg->chomp ? 0 : n);
|
|
}
|
|
}
|
|
}
|
|
str = strio_substr(ptr, ptr->pos, e - s - w, enc);
|
|
}
|
|
ptr->pos = e - RSTRING_PTR(ptr->string);
|
|
ptr->lineno++;
|
|
return str;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* gets(sep = $/, chomp: false) -> string or nil
|
|
* gets(limit, chomp: false) -> string or nil
|
|
* gets(sep, limit, chomp: false) -> string or nil
|
|
*
|
|
* Reads and returns a line from the stream;
|
|
* assigns the return value to <tt>$_</tt>;
|
|
* see {Line IO}[rdoc-ref:IO@Line+IO].
|
|
*/
|
|
static VALUE
|
|
strio_gets(int argc, VALUE *argv, VALUE self)
|
|
{
|
|
struct StringIO *ptr = readable(self);
|
|
struct getline_arg arg;
|
|
VALUE str;
|
|
|
|
if (prepare_getline_args(ptr, &arg, argc, argv)->limit == 0) {
|
|
if (NIL_P(ptr->string)) return Qnil;
|
|
return rb_enc_str_new(0, 0, get_enc(ptr));
|
|
}
|
|
|
|
str = strio_getline(&arg, ptr);
|
|
rb_lastline_set(str);
|
|
return str;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* readline(sep = $/, chomp: false) -> string
|
|
* readline(limit, chomp: false) -> string
|
|
* readline(sep, limit, chomp: false) -> string
|
|
*
|
|
* Reads a line as with IO#gets, but raises EOFError if already at end-of-file;
|
|
* see {Line IO}[rdoc-ref:IO@Line+IO].
|
|
*/
|
|
static VALUE
|
|
strio_readline(int argc, VALUE *argv, VALUE self)
|
|
{
|
|
VALUE line = rb_funcallv_kw(self, rb_intern("gets"), argc, argv, RB_PASS_CALLED_KEYWORDS);
|
|
if (NIL_P(line)) rb_eof_error();
|
|
return line;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* each_line(sep = $/, chomp: false) {|line| ... } -> self
|
|
* each_line(limit, chomp: false) {|line| ... } -> self
|
|
* each_line(sep, limit, chomp: false) {|line| ... } -> self
|
|
*
|
|
* Calls the block with each remaining line read from the stream;
|
|
* does nothing if already at end-of-file;
|
|
* returns +self+.
|
|
* See {Line IO}[rdoc-ref:IO@Line+IO].
|
|
*/
|
|
static VALUE
|
|
strio_each(int argc, VALUE *argv, VALUE self)
|
|
{
|
|
VALUE line;
|
|
struct StringIO *ptr = readable(self);
|
|
struct getline_arg arg;
|
|
|
|
RETURN_ENUMERATOR(self, argc, argv);
|
|
|
|
if (prepare_getline_args(ptr, &arg, argc, argv)->limit == 0) {
|
|
rb_raise(rb_eArgError, "invalid limit: 0 for each_line");
|
|
}
|
|
|
|
while (!NIL_P(line = strio_getline(&arg, ptr))) {
|
|
rb_yield(line);
|
|
}
|
|
return self;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* strio.readlines(sep=$/, chomp: false) -> array
|
|
* strio.readlines(limit, chomp: false) -> array
|
|
* strio.readlines(sep, limit, chomp: false) -> array
|
|
*
|
|
* See IO#readlines.
|
|
*/
|
|
static VALUE
|
|
strio_readlines(int argc, VALUE *argv, VALUE self)
|
|
{
|
|
VALUE ary, line;
|
|
struct StringIO *ptr = readable(self);
|
|
struct getline_arg arg;
|
|
|
|
if (prepare_getline_args(ptr, &arg, argc, argv)->limit == 0) {
|
|
rb_raise(rb_eArgError, "invalid limit: 0 for readlines");
|
|
}
|
|
|
|
ary = rb_ary_new();
|
|
while (!NIL_P(line = strio_getline(&arg, ptr))) {
|
|
rb_ary_push(ary, line);
|
|
}
|
|
return ary;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* strio.write(string, ...) -> integer
|
|
* strio.syswrite(string) -> integer
|
|
*
|
|
* Appends the given string to the underlying buffer string.
|
|
* The stream must be opened for writing. If the argument is not a
|
|
* string, it will be converted to a string using <code>to_s</code>.
|
|
* Returns the number of bytes written. See IO#write.
|
|
*/
|
|
static VALUE
|
|
strio_write_m(int argc, VALUE *argv, VALUE self)
|
|
{
|
|
long len = 0;
|
|
while (argc-- > 0) {
|
|
/* StringIO can't exceed long limit */
|
|
len += strio_write(self, *argv++);
|
|
}
|
|
return LONG2NUM(len);
|
|
}
|
|
|
|
static long
|
|
strio_write(VALUE self, VALUE str)
|
|
{
|
|
struct StringIO *ptr = writable(self);
|
|
long len, olen;
|
|
rb_encoding *enc, *enc2;
|
|
rb_encoding *const ascii8bit = rb_ascii8bit_encoding();
|
|
rb_encoding *usascii = 0;
|
|
|
|
if (!RB_TYPE_P(str, T_STRING))
|
|
str = rb_obj_as_string(str);
|
|
enc = get_enc(ptr);
|
|
if (!enc) return 0;
|
|
enc2 = rb_enc_get(str);
|
|
if (enc != enc2 && enc != ascii8bit && enc != (usascii = rb_usascii_encoding())) {
|
|
VALUE converted = rb_str_conv_enc(str, enc2, enc);
|
|
if (converted == str && enc2 != ascii8bit && enc2 != usascii) { /* conversion failed */
|
|
rb_enc_check(rb_enc_from_encoding(enc), str);
|
|
}
|
|
str = converted;
|
|
}
|
|
len = RSTRING_LEN(str);
|
|
if (len == 0) return 0;
|
|
check_modifiable(ptr);
|
|
olen = RSTRING_LEN(ptr->string);
|
|
if (ptr->flags & FMODE_APPEND) {
|
|
ptr->pos = olen;
|
|
}
|
|
if (ptr->pos == olen) {
|
|
if (enc == ascii8bit || enc2 == ascii8bit) {
|
|
rb_enc_str_buf_cat(ptr->string, RSTRING_PTR(str), len, enc);
|
|
}
|
|
else {
|
|
rb_str_buf_append(ptr->string, str);
|
|
}
|
|
}
|
|
else {
|
|
strio_extend(ptr, ptr->pos, len);
|
|
rb_str_modify(ptr->string);
|
|
memmove(RSTRING_PTR(ptr->string)+ptr->pos, RSTRING_PTR(str), len);
|
|
}
|
|
RB_GC_GUARD(str);
|
|
ptr->pos += len;
|
|
return len;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* strio << obj -> strio
|
|
*
|
|
* See IO#<<.
|
|
*/
|
|
#define strio_addstr rb_io_addstr
|
|
|
|
/*
|
|
* call-seq:
|
|
* strio.print() -> nil
|
|
* strio.print(obj, ...) -> nil
|
|
*
|
|
* See IO#print.
|
|
*/
|
|
#define strio_print rb_io_print
|
|
|
|
/*
|
|
* call-seq:
|
|
* strio.printf(format_string [, obj, ...] ) -> nil
|
|
*
|
|
* See IO#printf.
|
|
*/
|
|
#define strio_printf rb_io_printf
|
|
|
|
/*
|
|
* call-seq:
|
|
* strio.putc(obj) -> obj
|
|
*
|
|
* See IO#putc.
|
|
*/
|
|
static VALUE
|
|
strio_putc(VALUE self, VALUE ch)
|
|
{
|
|
struct StringIO *ptr = writable(self);
|
|
VALUE str;
|
|
|
|
check_modifiable(ptr);
|
|
if (RB_TYPE_P(ch, T_STRING)) {
|
|
if (NIL_P(ptr->string)) return ch;
|
|
str = rb_str_substr(ch, 0, 1);
|
|
}
|
|
else {
|
|
char c = NUM2CHR(ch);
|
|
if (NIL_P(ptr->string)) return ch;
|
|
str = rb_str_new(&c, 1);
|
|
}
|
|
strio_write(self, str);
|
|
return ch;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* strio.puts(obj, ...) -> nil
|
|
*
|
|
* See IO#puts.
|
|
*/
|
|
#define strio_puts rb_io_puts
|
|
|
|
/*
|
|
* call-seq:
|
|
* strio.read([length [, outbuf]]) -> string, outbuf, or nil
|
|
*
|
|
* See IO#read.
|
|
*/
|
|
static VALUE
|
|
strio_read(int argc, VALUE *argv, VALUE self)
|
|
{
|
|
struct StringIO *ptr = readable(self);
|
|
VALUE str = Qnil;
|
|
long len;
|
|
int binary = 0;
|
|
|
|
switch (argc) {
|
|
case 2:
|
|
str = argv[1];
|
|
if (!NIL_P(str)) {
|
|
StringValue(str);
|
|
rb_str_modify(str);
|
|
}
|
|
/* fall through */
|
|
case 1:
|
|
if (!NIL_P(argv[0])) {
|
|
len = NUM2LONG(argv[0]);
|
|
if (len < 0) {
|
|
rb_raise(rb_eArgError, "negative length %ld given", len);
|
|
}
|
|
if (len > 0 &&
|
|
(NIL_P(ptr->string) || ptr->pos >= RSTRING_LEN(ptr->string))) {
|
|
if (!NIL_P(str)) rb_str_resize(str, 0);
|
|
return Qnil;
|
|
}
|
|
binary = 1;
|
|
break;
|
|
}
|
|
/* fall through */
|
|
case 0:
|
|
if (NIL_P(ptr->string)) return Qnil;
|
|
len = RSTRING_LEN(ptr->string);
|
|
if (len <= ptr->pos) {
|
|
rb_encoding *enc = get_enc(ptr);
|
|
if (NIL_P(str)) {
|
|
str = rb_str_new(0, 0);
|
|
}
|
|
else {
|
|
rb_str_resize(str, 0);
|
|
}
|
|
rb_enc_associate(str, enc);
|
|
return str;
|
|
}
|
|
else {
|
|
len -= ptr->pos;
|
|
}
|
|
break;
|
|
default:
|
|
rb_error_arity(argc, 0, 2);
|
|
}
|
|
if (NIL_P(str)) {
|
|
rb_encoding *enc = binary ? rb_ascii8bit_encoding() : get_enc(ptr);
|
|
str = strio_substr(ptr, ptr->pos, len, enc);
|
|
}
|
|
else {
|
|
long rest = RSTRING_LEN(ptr->string) - ptr->pos;
|
|
if (len > rest) len = rest;
|
|
rb_str_resize(str, len);
|
|
MEMCPY(RSTRING_PTR(str), RSTRING_PTR(ptr->string) + ptr->pos, char, len);
|
|
if (!binary) {
|
|
rb_enc_copy(str, ptr->string);
|
|
}
|
|
}
|
|
ptr->pos += RSTRING_LEN(str);
|
|
return str;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* pread(maxlen, offset) -> string
|
|
* pread(maxlen, offset, out_string) -> string
|
|
*
|
|
* See IO#pread.
|
|
*/
|
|
static VALUE
|
|
strio_pread(int argc, VALUE *argv, VALUE self)
|
|
{
|
|
VALUE rb_len, rb_offset, rb_buf;
|
|
rb_scan_args(argc, argv, "21", &rb_len, &rb_offset, &rb_buf);
|
|
long len = NUM2LONG(rb_len);
|
|
long offset = NUM2LONG(rb_offset);
|
|
|
|
if (len < 0) {
|
|
rb_raise(rb_eArgError, "negative string size (or size too big): %" PRIsVALUE, rb_len);
|
|
}
|
|
|
|
if (len == 0) {
|
|
if (NIL_P(rb_buf)) {
|
|
return rb_str_new("", 0);
|
|
}
|
|
return rb_buf;
|
|
}
|
|
|
|
if (offset < 0) {
|
|
rb_syserr_fail_str(EINVAL, rb_sprintf("pread: Invalid offset argument: %" PRIsVALUE, rb_offset));
|
|
}
|
|
|
|
struct StringIO *ptr = readable(self);
|
|
|
|
if (offset >= RSTRING_LEN(ptr->string)) {
|
|
rb_eof_error();
|
|
}
|
|
|
|
if (NIL_P(rb_buf)) {
|
|
return strio_substr(ptr, offset, len, rb_ascii8bit_encoding());
|
|
}
|
|
|
|
long rest = RSTRING_LEN(ptr->string) - offset;
|
|
if (len > rest) len = rest;
|
|
rb_str_resize(rb_buf, len);
|
|
rb_enc_associate(rb_buf, rb_ascii8bit_encoding());
|
|
MEMCPY(RSTRING_PTR(rb_buf), RSTRING_PTR(ptr->string) + offset, char, len);
|
|
return rb_buf;
|
|
}
|
|
|
|
|
|
/*
|
|
* call-seq:
|
|
* strio.sysread(integer[, outbuf]) -> string
|
|
* strio.readpartial(integer[, outbuf]) -> string
|
|
*
|
|
* Similar to #read, but raises +EOFError+ at end of string instead of
|
|
* returning +nil+, as well as IO#sysread does.
|
|
*/
|
|
static VALUE
|
|
strio_sysread(int argc, VALUE *argv, VALUE self)
|
|
{
|
|
VALUE val = rb_funcallv_kw(self, rb_intern("read"), argc, argv, RB_PASS_CALLED_KEYWORDS);
|
|
if (NIL_P(val)) {
|
|
rb_eof_error();
|
|
}
|
|
return val;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* strio.read_nonblock(integer[, outbuf [, opts]]) -> string
|
|
*
|
|
* Similar to #read, but raises +EOFError+ at end of string unless the
|
|
* +exception: false+ option is passed in.
|
|
*/
|
|
static VALUE
|
|
strio_read_nonblock(int argc, VALUE *argv, VALUE self)
|
|
{
|
|
VALUE opts = Qnil, val;
|
|
|
|
rb_scan_args(argc, argv, "11:", NULL, NULL, &opts);
|
|
|
|
if (!NIL_P(opts)) {
|
|
argc--;
|
|
}
|
|
|
|
val = strio_read(argc, argv, self);
|
|
if (NIL_P(val)) {
|
|
if (!NIL_P(opts) &&
|
|
rb_hash_lookup2(opts, sym_exception, Qundef) == Qfalse)
|
|
return Qnil;
|
|
else
|
|
rb_eof_error();
|
|
}
|
|
|
|
return val;
|
|
}
|
|
|
|
/*
|
|
* See IO#write
|
|
*/
|
|
#define strio_syswrite rb_io_write
|
|
|
|
/*
|
|
* See IO#write_nonblock
|
|
*/
|
|
static VALUE
|
|
strio_syswrite_nonblock(int argc, VALUE *argv, VALUE self)
|
|
{
|
|
VALUE str;
|
|
|
|
rb_scan_args(argc, argv, "10:", &str, NULL);
|
|
return strio_syswrite(self, str);
|
|
}
|
|
|
|
#define strio_isatty strio_false
|
|
|
|
#define strio_pid strio_nil
|
|
|
|
#define strio_fileno strio_nil
|
|
|
|
/*
|
|
* call-seq:
|
|
* strio.length -> integer
|
|
* strio.size -> integer
|
|
*
|
|
* Returns the size of the buffer string.
|
|
*/
|
|
static VALUE
|
|
strio_size(VALUE self)
|
|
{
|
|
VALUE string = StringIO(self)->string;
|
|
if (NIL_P(string)) {
|
|
return INT2FIX(0);
|
|
}
|
|
return ULONG2NUM(RSTRING_LEN(string));
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* strio.truncate(integer) -> 0
|
|
*
|
|
* Truncates the buffer string to at most _integer_ bytes. The stream
|
|
* must be opened for writing.
|
|
*/
|
|
static VALUE
|
|
strio_truncate(VALUE self, VALUE len)
|
|
{
|
|
VALUE string = writable(self)->string;
|
|
long l = NUM2LONG(len);
|
|
long plen;
|
|
if (l < 0) {
|
|
error_inval("negative length");
|
|
}
|
|
if (NIL_P(string)) return 0;
|
|
plen = RSTRING_LEN(string);
|
|
rb_str_resize(string, l);
|
|
if (plen < l) {
|
|
MEMZERO(RSTRING_PTR(string) + plen, char, l - plen);
|
|
}
|
|
return INT2FIX(0);
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* strio.external_encoding => encoding
|
|
*
|
|
* Returns the Encoding object that represents the encoding of the file.
|
|
* If the stream is write mode and no encoding is specified, returns
|
|
* +nil+.
|
|
*/
|
|
|
|
static VALUE
|
|
strio_external_encoding(VALUE self)
|
|
{
|
|
struct StringIO *ptr = StringIO(self);
|
|
return rb_enc_from_encoding(get_enc(ptr));
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* strio.internal_encoding => encoding
|
|
*
|
|
* Returns the Encoding of the internal string if conversion is
|
|
* specified. Otherwise returns +nil+.
|
|
*/
|
|
|
|
static VALUE
|
|
strio_internal_encoding(VALUE self)
|
|
{
|
|
return Qnil;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* strio.set_encoding(ext_enc, [int_enc[, opt]]) => strio
|
|
*
|
|
* Specify the encoding of the StringIO as <i>ext_enc</i>.
|
|
* Use the default external encoding if <i>ext_enc</i> is nil.
|
|
* 2nd argument <i>int_enc</i> and optional hash <i>opt</i> argument
|
|
* are ignored; they are for API compatibility to IO.
|
|
*/
|
|
|
|
static VALUE
|
|
strio_set_encoding(int argc, VALUE *argv, VALUE self)
|
|
{
|
|
rb_encoding* enc;
|
|
struct StringIO *ptr = StringIO(self);
|
|
VALUE ext_enc, int_enc, opt;
|
|
|
|
argc = rb_scan_args(argc, argv, "11:", &ext_enc, &int_enc, &opt);
|
|
|
|
if (NIL_P(ext_enc)) {
|
|
enc = rb_default_external_encoding();
|
|
}
|
|
else {
|
|
enc = rb_find_encoding(ext_enc);
|
|
if (!enc) {
|
|
rb_io_enc_t convconfig;
|
|
int oflags, fmode;
|
|
VALUE vmode = rb_str_append(rb_str_new_cstr("r:"), ext_enc);
|
|
rb_io_extract_modeenc(&vmode, 0, Qnil, &oflags, &fmode, &convconfig);
|
|
enc = convconfig.enc2;
|
|
}
|
|
}
|
|
ptr->enc = enc;
|
|
if (!NIL_P(ptr->string) && WRITABLE(self)) {
|
|
rb_enc_associate(ptr->string, enc);
|
|
}
|
|
|
|
return self;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* strio.set_encoding_by_bom => strio or nil
|
|
*
|
|
* Sets the encoding according to the BOM (Byte Order Mark) in the
|
|
* string.
|
|
*
|
|
* Returns +self+ if the BOM is found, otherwise +nil.
|
|
*/
|
|
static VALUE
|
|
strio_set_encoding_by_bom(VALUE self)
|
|
{
|
|
struct StringIO *ptr = StringIO(self);
|
|
|
|
if (!set_encoding_by_bom(ptr)) return Qnil;
|
|
return rb_enc_from_encoding(ptr->enc);
|
|
}
|
|
|
|
/*
|
|
* \IO streams for strings, with access similar to
|
|
* {IO}[rdoc-ref:IO];
|
|
* see {IO}[rdoc-ref:IO].
|
|
*
|
|
* === About the Examples
|
|
*
|
|
* Examples on this page assume that \StringIO has been required:
|
|
*
|
|
* require 'stringio'
|
|
*
|
|
*/
|
|
void
|
|
Init_stringio(void)
|
|
{
|
|
#undef rb_intern
|
|
|
|
#ifdef HAVE_RB_EXT_RACTOR_SAFE
|
|
rb_ext_ractor_safe(true);
|
|
#endif
|
|
|
|
VALUE StringIO = rb_define_class("StringIO", rb_cObject);
|
|
|
|
/* The version string */
|
|
rb_define_const(StringIO, "VERSION", rb_str_new_cstr(STRINGIO_VERSION));
|
|
|
|
rb_include_module(StringIO, rb_mEnumerable);
|
|
rb_define_alloc_func(StringIO, strio_s_allocate);
|
|
|
|
/* Maximum length that a StringIO instance can hold */
|
|
rb_define_const(StringIO, "MAX_LENGTH", LONG2NUM(LONG_MAX));
|
|
|
|
rb_define_singleton_method(StringIO, "new", strio_s_new, -1);
|
|
rb_define_singleton_method(StringIO, "open", strio_s_open, -1);
|
|
rb_define_method(StringIO, "initialize", strio_initialize, -1);
|
|
rb_define_method(StringIO, "initialize_copy", strio_copy, 1);
|
|
rb_define_method(StringIO, "reopen", strio_reopen, -1);
|
|
|
|
rb_define_method(StringIO, "string", strio_get_string, 0);
|
|
rb_define_method(StringIO, "string=", strio_set_string, 1);
|
|
rb_define_method(StringIO, "lineno", strio_get_lineno, 0);
|
|
rb_define_method(StringIO, "lineno=", strio_set_lineno, 1);
|
|
|
|
|
|
/* call-seq: strio.binmode -> true */
|
|
rb_define_method(StringIO, "binmode", strio_binmode, 0);
|
|
rb_define_method(StringIO, "close", strio_close, 0);
|
|
rb_define_method(StringIO, "close_read", strio_close_read, 0);
|
|
rb_define_method(StringIO, "close_write", strio_close_write, 0);
|
|
rb_define_method(StringIO, "closed?", strio_closed, 0);
|
|
rb_define_method(StringIO, "closed_read?", strio_closed_read, 0);
|
|
rb_define_method(StringIO, "closed_write?", strio_closed_write, 0);
|
|
rb_define_method(StringIO, "eof", strio_eof, 0);
|
|
rb_define_method(StringIO, "eof?", strio_eof, 0);
|
|
/* call-seq: strio.fcntl */
|
|
rb_define_method(StringIO, "fcntl", strio_fcntl, -1);
|
|
/* call-seq: strio.flush -> strio */
|
|
rb_define_method(StringIO, "flush", strio_flush, 0);
|
|
/* call-seq: strio.fsync -> 0 */
|
|
rb_define_method(StringIO, "fsync", strio_fsync, 0);
|
|
rb_define_method(StringIO, "pos", strio_get_pos, 0);
|
|
rb_define_method(StringIO, "pos=", strio_set_pos, 1);
|
|
rb_define_method(StringIO, "rewind", strio_rewind, 0);
|
|
rb_define_method(StringIO, "seek", strio_seek, -1);
|
|
rb_define_method(StringIO, "sync", strio_get_sync, 0);
|
|
/* call-seq: strio.sync = boolean -> boolean */
|
|
rb_define_method(StringIO, "sync=", strio_set_sync, 1);
|
|
rb_define_method(StringIO, "tell", strio_tell, 0);
|
|
|
|
rb_define_method(StringIO, "each", strio_each, -1);
|
|
rb_define_method(StringIO, "each_line", strio_each, -1);
|
|
rb_define_method(StringIO, "each_byte", strio_each_byte, 0);
|
|
rb_define_method(StringIO, "each_char", strio_each_char, 0);
|
|
rb_define_method(StringIO, "each_codepoint", strio_each_codepoint, 0);
|
|
rb_define_method(StringIO, "getc", strio_getc, 0);
|
|
rb_define_method(StringIO, "ungetc", strio_ungetc, 1);
|
|
rb_define_method(StringIO, "ungetbyte", strio_ungetbyte, 1);
|
|
rb_define_method(StringIO, "getbyte", strio_getbyte, 0);
|
|
rb_define_method(StringIO, "gets", strio_gets, -1);
|
|
rb_define_method(StringIO, "readlines", strio_readlines, -1);
|
|
rb_define_method(StringIO, "read", strio_read, -1);
|
|
rb_define_method(StringIO, "pread", strio_pread, -1);
|
|
|
|
rb_define_method(StringIO, "write", strio_write_m, -1);
|
|
rb_define_method(StringIO, "putc", strio_putc, 1);
|
|
|
|
/*
|
|
* call-seq:
|
|
* strio.isatty -> nil
|
|
* strio.tty? -> nil
|
|
*
|
|
*/
|
|
rb_define_method(StringIO, "isatty", strio_isatty, 0);
|
|
rb_define_method(StringIO, "tty?", strio_isatty, 0);
|
|
|
|
/* call-seq: strio.pid -> nil */
|
|
rb_define_method(StringIO, "pid", strio_pid, 0);
|
|
|
|
/* call-seq: strio.fileno -> nil */
|
|
rb_define_method(StringIO, "fileno", strio_fileno, 0);
|
|
rb_define_method(StringIO, "size", strio_size, 0);
|
|
rb_define_method(StringIO, "length", strio_size, 0);
|
|
rb_define_method(StringIO, "truncate", strio_truncate, 1);
|
|
|
|
rb_define_method(StringIO, "external_encoding", strio_external_encoding, 0);
|
|
rb_define_method(StringIO, "internal_encoding", strio_internal_encoding, 0);
|
|
rb_define_method(StringIO, "set_encoding", strio_set_encoding, -1);
|
|
rb_define_method(StringIO, "set_encoding_by_bom", strio_set_encoding_by_bom, 0);
|
|
|
|
{
|
|
VALUE mReadable = rb_define_module_under(rb_cIO, "generic_readable");
|
|
rb_define_method(mReadable, "readchar", strio_readchar, 0);
|
|
rb_define_method(mReadable, "readbyte", strio_readbyte, 0);
|
|
rb_define_method(mReadable, "readline", strio_readline, -1);
|
|
rb_define_method(mReadable, "sysread", strio_sysread, -1);
|
|
rb_define_method(mReadable, "readpartial", strio_sysread, -1);
|
|
rb_define_method(mReadable, "read_nonblock", strio_read_nonblock, -1);
|
|
rb_include_module(StringIO, mReadable);
|
|
}
|
|
{
|
|
VALUE mWritable = rb_define_module_under(rb_cIO, "generic_writable");
|
|
rb_define_method(mWritable, "<<", strio_addstr, 1);
|
|
rb_define_method(mWritable, "print", strio_print, -1);
|
|
rb_define_method(mWritable, "printf", strio_printf, -1);
|
|
rb_define_method(mWritable, "puts", strio_puts, -1);
|
|
rb_define_method(mWritable, "syswrite", strio_syswrite, 1);
|
|
rb_define_method(mWritable, "write_nonblock", strio_syswrite_nonblock, -1);
|
|
rb_include_module(StringIO, mWritable);
|
|
}
|
|
|
|
sym_exception = ID2SYM(rb_intern("exception"));
|
|
}
|