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stringio.c: strio_unget_bytes

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* ext/stringio/stringio.c (strio_unget_bytes): extract from
  strio_ungetbyte to share with strio_ungetc.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@53185 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
nobu 2015-12-18 06:40:00 +00:00
parent a6e055f4a1
commit 21973c01ab
2 changed files with 26 additions and 31 deletions
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5
ChangeLog
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@ -1,3 +1,8 @@
Fri Dec 18 15:40:06 2015 Nobuyoshi Nakada <nobu@ruby-lang.org>
* ext/stringio/stringio.c (strio_unget_bytes): extract from
strio_ungetbyte to share with strio_ungetc.
Fri Dec 18 12:39:42 2015 SHIBATA Hiroshi <hsbt@ruby-lang.org>
* doc/syntax/*.rdoc: separated modifier at sentence.

52
ext/stringio/stringio.c
View File

@ -29,6 +29,7 @@ struct StringIO {
};
static void strio_init(int, VALUE *, struct StringIO *, VALUE);
static VALUE strio_unget_bytes(struct StringIO *, const char *, long);
#define IS_STRIO(obj) (rb_typeddata_is_kind_of((obj), &strio_data_type))
#define error_inval(msg) (errno = EINVAL, rb_sys_fail(msg))
@ -723,19 +724,17 @@ static VALUE
strio_ungetc(VALUE self, VALUE c)
{
struct StringIO *ptr = readable(self);
long lpos, clen;
char *p, *pend;
rb_encoding *enc, *enc2;
if (NIL_P(c)) return Qnil;
check_modifiable(ptr);
if (NIL_P(c)) return Qnil;
if (FIXNUM_P(c)) {
int cc = FIX2INT(c);
char buf[16];
enc = rb_enc_get(ptr->string);
rb_enc_mbcput(cc, buf, enc);
c = rb_enc_str_new(buf, rb_enc_codelen(cc, enc), enc);
return strio_unget_bytes(ptr, buf, rb_enc_codelen(cc, enc));
}
else {
SafeStringValue(c);
@ -744,29 +743,10 @@ strio_ungetc(VALUE self, VALUE c)
if (enc != enc2 && enc != rb_ascii8bit_encoding()) {
c = rb_str_conv_enc(c, enc2, enc);
}
strio_unget_bytes(ptr, RSTRING_PTR(c), RSTRING_LEN(c));
RB_GC_GUARD(c);
return Qnil;
}
if (RSTRING_LEN(ptr->string) < ptr->pos) {
long len = RSTRING_LEN(ptr->string);
rb_str_resize(ptr->string, ptr->pos - 1);
memset(RSTRING_PTR(ptr->string) + len, 0, ptr->pos - len - 1);
rb_str_concat(ptr->string, c);
ptr->pos--;
}
else {
/* get logical position */
lpos = 0; p = RSTRING_PTR(ptr->string); pend = p + ptr->pos;
for (;;) {
clen = rb_enc_mbclen(p, pend, enc);
if (p+clen >= pend) break;
p += clen;
lpos++;
}
clen = p - RSTRING_PTR(ptr->string);
rb_str_update(ptr->string, lpos, ptr->pos ? 1 : 0, c);
ptr->pos = clen;
}
return Qnil;
}
/*
@ -780,21 +760,32 @@ strio_ungetbyte(VALUE self, VALUE c)
{
struct StringIO *ptr = readable(self);
char buf[1], *cp = buf;
long pos = ptr->pos, cl = 1, len, rest;
VALUE str = ptr->string;
char *s;
long cl = 1;
check_modifiable(ptr);
if (NIL_P(c)) return Qnil;
if (FIXNUM_P(c)) {
buf[0] = (char)FIX2INT(c);
return strio_unget_bytes(ptr, buf, 1);
}
else {
SafeStringValue(c);
cp = RSTRING_PTR(c);
cl = RSTRING_LEN(c);
if (cl == 0) return Qnil;
strio_unget_bytes(ptr, cp, cl);
RB_GC_GUARD(c);
return Qnil;
}
check_modifiable(ptr);
}
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) {
@ -816,7 +807,6 @@ strio_ungetbyte(VALUE self, VALUE c)
}
memcpy(s + pos, cp, cl);
ptr->pos = pos;
RB_GC_GUARD(c);
return Qnil;
}