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changed find/rfind to return -1 for matches outside the source string

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This commit is contained in:
Fredrik Lundh 2006-05-30 17:11:48 +00:00
parent 9faa3eda6b
commit 93eff6fecd
2 changed files with 19 additions and 10 deletions
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21
Objects/stringlib/find.h
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@ -14,8 +14,11 @@ stringlib_find(const STRINGLIB_CHAR* str, Py_ssize_t str_len,
{
Py_ssize_t pos;
if (sub_len == 0)
if (sub_len == 0) {
if (str_len < 0)
return -1;
return offset;
}
pos = fastsearch(str, str_len, sub, sub_len, FAST_SEARCH);
@ -30,22 +33,20 @@ stringlib_rfind(const STRINGLIB_CHAR* str, Py_ssize_t str_len,
const STRINGLIB_CHAR* sub, Py_ssize_t sub_len,
Py_ssize_t offset)
{
Py_ssize_t pos;
/* XXX - create reversefastsearch helper! */
if (sub_len == 0)
pos = str_len + offset;
else {
Py_ssize_t j;
pos = -1;
if (sub_len == 0) {
if (str_len < 0)
return -1;
return str_len + offset;
} else {
Py_ssize_t j, pos = -1;
for (j = str_len - sub_len; j >= 0; --j)
if (STRINGLIB_CMP(str+j, sub, sub_len) == 0) {
pos = j + offset;
break;
}
return pos;
}
return pos;
}
Py_LOCAL_INLINE(Py_ssize_t)