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* ext/stringio/stringio.c (strio_ungetc): should allow ungetc at

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the top of the buffer.  ref #701

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_8@20151 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
matz 2008-11-08 08:48:43 +00:00
parent ef1e9185f4
commit ecdd96c58d
2 changed files with 22 additions and 8 deletions
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5
ChangeLog
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@ -1,3 +1,8 @@
Sat Nov 8 17:47:28 2008 Yukihiro Matsumoto <matz@ruby-lang.org>
* ext/stringio/stringio.c (strio_ungetc): should allow ungetc at
the top of the buffer. ref #701
Sat Nov 8 01:38:07 2008 NARUSE, Yui <naruse@ruby-lang.org>
* ext/nkf/nkf-utf8/nkf.c (h_conv): can't guess UTF-8 input in

25
ext/stringio/stringio.c
View file

@ -781,15 +781,24 @@ strio_ungetc(self, ch)
int cc = NUM2INT(ch);
long len, pos = ptr->pos;
if (cc != EOF && pos > 0) {
if ((len = RSTRING(ptr->string)->len) < pos-- ||
(unsigned char)RSTRING(ptr->string)->ptr[pos] !=
(unsigned char)cc) {
strio_extend(ptr, pos, 1);
RSTRING(ptr->string)->ptr[pos] = cc;
OBJ_INFECT(ptr->string, self);
if (cc != EOF) {
len = RSTRING(ptr->string)->len;
if (pos == 0) {
char *p;
rb_str_resize(ptr->string, len + 1);
p = RSTRING(ptr->string)->ptr;
memmove(p + 1, p, len);
}
--ptr->pos;
else {
if (len < pos-- ||
(unsigned char)RSTRING(ptr->string)->ptr[pos] !=
(unsigned char)cc) {
strio_extend(ptr, pos, 1);
}
--ptr->pos;
}
RSTRING(ptr->string)->ptr[pos] = cc;
OBJ_INFECT(ptr->string, self);
ptr->flags &= ~STRIO_EOF;
}
return Qnil;