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author | nobu <nobu@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2009-05-14 07:07:55 +0000 |
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committer | nobu <nobu@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2009-05-14 07:07:55 +0000 |
commit | af634f8455ecb48209637bf8c748dad7136b9c9f (patch) | |
tree | 182da57d1302b6a6c0e15482a553d26d103abeb2 /ext/stringio/stringio.c | |
parent | 760f2c2917393f597c1a833c3c3015fd1bd50c3f (diff) | |
download | ruby-af634f8455ecb48209637bf8c748dad7136b9c9f.tar.gz |
* ext/stringio/stringio.c (strio_ungetbyte): encoding should not
be effective.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@23424 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
Diffstat (limited to 'ext/stringio/stringio.c')
-rw-r--r-- | ext/stringio/stringio.c | 33 |
1 files changed, 31 insertions, 2 deletions
diff --git a/ext/stringio/stringio.c b/ext/stringio/stringio.c index bc605da2a7..9bb5ed8a2a 100644 --- a/ext/stringio/stringio.c +++ b/ext/stringio/stringio.c @@ -744,8 +744,37 @@ strio_ungetc(VALUE self, VALUE c) static VALUE strio_ungetbyte(VALUE self, VALUE c) { - NUM2INT(c); - return strio_ungetc(self, c); + struct StringIO *ptr = readable(StringIO(self)); + char buf[1], *cp = buf; + long pos = ptr->pos, cl = 1; + VALUE str = ptr->string; + + if (NIL_P(c)) return Qnil; + if (FIXNUM_P(c)) { + buf[0] = (char)FIX2INT(c); + } + else { + SafeStringValue(c); + cp = RSTRING_PTR(c); + cl = RSTRING_LEN(c); + if (cl == 0) return Qnil; + } + rb_str_modify(str); + if (cl > pos) { + char *s; + long rest = RSTRING_LEN(str) - pos; + rb_str_resize(str, rest + cl); + s = RSTRING_PTR(str); + memmove(s + cl, s + pos, rest); + pos = 0; + } + else { + pos -= cl; + } + memcpy(RSTRING_PTR(str) + pos, cp, cl); + ptr->pos = pos; + RB_GC_GUARD(c); + return Qnil; } /* |