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* string.c (rb_str_subseq): retrieve substring based on byte offset. 

* string.c (rb_str_rindex_m): was confusing character offset and
  byte offset.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@13295 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
matz 2007-08-28 06:45:32 +00:00
parent 01c24a2f78
commit 51b4cc11d1
4 changed files with 40 additions and 20 deletions
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7
ChangeLog
View File

@ -1,3 +1,10 @@
Tue Aug 28 15:42:09 2007 Yukihiro Matsumoto <matz@ruby-lang.org>
* string.c (rb_str_subseq): retrieve substring based on byte offset.
* string.c (rb_str_rindex_m): was confusing character offset and
byte offset.
Tue Aug 28 14:23:31 2007 Nobuyoshi Nakada <nobu@ruby-lang.org>
* string.c (rb_str_splice_0): should check to modify. [ruby-dev:31665]

1
include/ruby/intern.h
View File

@ -500,6 +500,7 @@ VALUE rb_str_plus(VALUE, VALUE);
VALUE rb_str_times(VALUE, VALUE);
int rb_str_sublen(VALUE, int);
VALUE rb_str_substr(VALUE, long, long);
VALUE rb_str_subseq(VALUE, long, long);
void rb_str_modify(VALUE);
VALUE rb_str_freeze(VALUE);
void rb_str_set_len(VALUE, long);

10
re.c
View File

@ -1114,7 +1114,7 @@ rb_reg_nth_match(int nth, VALUE match)
if (start == -1) return Qnil;
end = RMATCH(match)->END(nth);
len = end - start;
str = rb_str_substr(RMATCH(match)->str, start, len);
str = rb_str_subseq(RMATCH(match)->str, start, len);
OBJ_INFECT(str, match);
return str;
}
@ -1144,7 +1144,7 @@ rb_reg_match_pre(VALUE match)
if (NIL_P(match)) return Qnil;
if (RMATCH(match)->BEG(0) == -1) return Qnil;
str = rb_str_substr(RMATCH(match)->str, 0, RMATCH(match)->BEG(0));
str = rb_str_subseq(RMATCH(match)->str, 0, RMATCH(match)->BEG(0));
if (OBJ_TAINTED(match)) OBJ_TAINT(str);
return str;
}
@ -1171,7 +1171,7 @@ rb_reg_match_post(VALUE match)
if (RMATCH(match)->BEG(0) == -1) return Qnil;
str = RMATCH(match)->str;
pos = RMATCH(match)->END(0);
str = rb_str_substr(str, pos, RSTRING_LEN(str) - pos);
str = rb_str_subseq(str, pos, RSTRING_LEN(str) - pos);
if (OBJ_TAINTED(match)) OBJ_TAINT(str);
return str;
}
@ -1228,7 +1228,7 @@ match_array(VALUE match, int start)
rb_ary_push(ary, Qnil);
}
else {
VALUE str = rb_str_substr(target, regs->beg[i], regs->end[i]-regs->beg[i]);
VALUE str = rb_str_subseq(target, regs->beg[i], regs->end[i]-regs->beg[i]);
if (taint) OBJ_TAINT(str);
rb_ary_push(ary, str);
}
@ -1423,7 +1423,7 @@ match_select(int argc, VALUE *argv, VALUE match)
int taint = OBJ_TAINTED(match);
for (i=0; i<regs->num_regs; i++) {
VALUE str = rb_str_substr(target, regs->beg[i], regs->end[i]-regs->beg[i]);
VALUE str = rb_str_subseq(target, regs->beg[i], regs->end[i]-regs->beg[i]);
if (taint) OBJ_TAINT(str);
if (RTEST(rb_yield(str))) {
rb_ary_push(result, str);

42
string.c
View File

@ -400,10 +400,10 @@ rb_str_init(int argc, VALUE *argv, VALUE str)
return str;
}
static int
static long
str_strlen(VALUE str, rb_encoding *enc)
{
int len;
long len;
if (!enc) enc = rb_enc_get(str);
len = rb_enc_strlen(RSTRING_PTR(str), RSTRING_END(str), enc);
@ -696,14 +696,14 @@ str_offset(const char *p, const char *e, int nth, rb_encoding *enc)
return pp - p;
}
static int
str_sublen(VALUE str, int pos, rb_encoding *enc)
static long
str_sublen(VALUE str, long pos, rb_encoding *enc)
{
if (rb_enc_mbmaxlen(enc) == 1 || pos < 0) return pos;
else {
char *p = RSTRING_PTR(str);
char *e = p + pos;
int i;
long i;
i = 0;
while (p < e) {
@ -720,6 +720,17 @@ rb_str_sublen(VALUE str, int len)
return str_sublen(str, len, rb_enc_get(str));
}
VALUE
rb_str_subseq(VALUE str, long beg, long len)
{
VALUE str2 = rb_str_new5(str, RSTRING_PTR(str)+beg, len);
rb_enc_copy(str2, str);
OBJ_INFECT(str2, str);
return str2;
}
VALUE
rb_str_substr(VALUE str, long beg, long len)
{
@ -1439,12 +1450,13 @@ rb_str_rindex_m(int argc, VALUE *argv, VALUE str)
{
VALUE sub;
VALUE vpos;
long pos;
rb_encoding *enc = rb_enc_get(str);
long pos, len = str_strlen(str, enc);
if (rb_scan_args(argc, argv, "11", &sub, &vpos) == 2) {
pos = NUM2LONG(vpos);
if (pos < 0) {
pos += RSTRING_LEN(str);
pos += len;
if (pos < 0) {
if (TYPE(sub) == T_REGEXP) {
rb_backref_set(Qnil);
@ -1452,17 +1464,15 @@ rb_str_rindex_m(int argc, VALUE *argv, VALUE str)
return Qnil;
}
}
if (pos > RSTRING_LEN(str)) pos = RSTRING_LEN(str);
if (pos > len) pos = len;
}
else {
pos = RSTRING_LEN(str);
pos = len;
}
switch (TYPE(sub)) {
case T_REGEXP:
/* enc = rb_get_check(str, sub); */
pos++; /* xxx adjust for Oniguruma 5.x */
pos = str_offset(RSTRING_PTR(str), RSTRING_END(str), pos, rb_enc_get(str));
if (RREGEXP(sub)->len) {
pos = rb_reg_adjust_startpos(sub, str, pos, 1);
pos = rb_reg_search(sub, str, pos, 1);
@ -1483,6 +1493,7 @@ rb_str_rindex_m(int argc, VALUE *argv, VALUE str)
}
/* fall through */
case T_STRING:
pos = str_sublen(str, pos, enc);
pos = rb_str_rindex(str, sub, pos);
if (pos >= 0) return LONG2NUM(pos);
break;
@ -2076,6 +2087,7 @@ rb_str_slice_bang(int argc, VALUE *argv, VALUE str)
for (i=0; i<argc; i++) {
buf[i] = argv[i];
}
rb_str_modify(str);
buf[i] = rb_str_new(0,0);
result = rb_str_aref_m(argc, buf, str);
if (!NIL_P(result)) {
@ -3786,7 +3798,7 @@ rb_str_split_m(int argc, VALUE *argv, VALUE str)
break;
}
else if (last_null == 1) {
rb_ary_push(result, rb_str_substr(str, beg,
rb_ary_push(result, rb_str_subseq(str, beg,
rb_enc_mbclen(RSTRING_PTR(str)+beg,enc)));
beg = start;
}
@ -3797,7 +3809,7 @@ rb_str_split_m(int argc, VALUE *argv, VALUE str)
}
}
else {
rb_ary_push(result, rb_str_substr(str, beg, end-beg));
rb_ary_push(result, rb_str_subseq(str, beg, end-beg));
beg = start = END(0);
}
last_null = 0;
@ -3807,7 +3819,7 @@ rb_str_split_m(int argc, VALUE *argv, VALUE str)
if (BEG(idx) == END(idx))
tmp = rb_str_new5(str, 0, 0);
else
tmp = rb_str_substr(str, BEG(idx), END(idx)-BEG(idx));
tmp = rb_str_subseq(str, BEG(idx), END(idx)-BEG(idx));
rb_ary_push(result, tmp);
}
if (!NIL_P(limit) && lim <= ++i) break;
@ -3817,7 +3829,7 @@ rb_str_split_m(int argc, VALUE *argv, VALUE str)
if (RSTRING_LEN(str) == beg)
tmp = rb_str_new5(str, 0, 0);
else
tmp = rb_str_substr(str, beg, RSTRING_LEN(str)-beg);
tmp = rb_str_subseq(str, beg, RSTRING_LEN(str)-beg);
rb_ary_push(result, tmp);
}
if (NIL_P(limit) && lim == 0) {