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Fudge. stropmodule and stringobject both had copies of the buggy

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mymemXXX stuff, and they were already out of synch.  Fix the remaining
bugs in both and get them back in synch.
Bugfix release candidate.
This commit is contained in:
Tim Peters 2001-05-10 00:05:33 +00:00
parent 1a7b3eee94
commit 4cd44ef4bf
2 changed files with 56 additions and 42 deletions
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77
Objects/stringobject.c
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@ -1546,7 +1546,7 @@ mymemreplace(const char *str, int len, /* input string */
const char *pat, int pat_len, /* pattern string to find */
const char *sub, int sub_len, /* substitution string */
int count, /* number of replacements */
int *out_len)
int *out_len)
{
char *out_s;
char *new_s;
@ -1557,47 +1557,56 @@ mymemreplace(const char *str, int len, /* input string */
/* find length of output string */
nfound = mymemcnt(str, len, pat, pat_len);
if (count < 0)
count = INT_MAX;
else if (nfound > count)
nfound = count;
if (count > 0)
nfound = nfound > count ? count : nfound;
if (nfound == 0)
goto return_same;
new_len = len + nfound*(sub_len - pat_len);
new_s = (char *)PyMem_MALLOC(new_len);
if (new_s == NULL) return NULL;
*out_len = new_len;
out_s = new_s;
while (len > 0) {
/* find index of next instance of pattern */
offset = mymemfind(str, len, pat, pat_len);
/* if not found, break out of loop */
if (offset == -1) break;
/* copy non matching part of input string */
memcpy(new_s, str, offset); /* copy part of str before pat */
str += offset + pat_len; /* move str past pattern */
len -= offset + pat_len; /* reduce length of str remaining */
/* copy substitute into the output string */
new_s += offset; /* move new_s to dest for sub string */
memcpy(new_s, sub, sub_len); /* copy substring into new_s */
new_s += sub_len; /* offset new_s past sub string */
/* break when we've done count replacements */
if (--count == 0) break;
if (new_len == 0) {
/* Have to allocate something for the caller to free(). */
out_s = (char *)PyMem_MALLOC(1);
if (out_s = NULL)
return NULL;
out_s[0] = '\0';
}
/* copy any remaining values into output string */
if (len > 0)
memcpy(new_s, str, len);
else {
assert(new_len > 0);
new_s = (char *)PyMem_MALLOC(new_len);
if (new_s == NULL)
return NULL;
out_s = new_s;
while (len > 0) {
/* find index of next instance of pattern */
offset = mymemfind(str, len, pat, pat_len);
if (offset == -1)
break;
/* copy non matching part of input string */
memcpy(new_s, str, offset);
str += offset + pat_len;
len -= offset + pat_len;
/* copy substitute into the output string */
new_s += offset;
memcpy(new_s, sub, sub_len);
new_s += sub_len;
/* note count==0 is effectively infinity */
if (--count == 0)
break;
}
/* copy any remaining values into output string */
if (len > 0)
memcpy(new_s, str, len);
}
*out_len = new_len;
return out_s;
return_same:
*out_len = -1;
return (char*)str; /* have to cast away constness here */
return (char *)str; /* cast away const */
}