diff options
Diffstat (limited to 'ext/standard/string.c')
| -rw-r--r-- | ext/standard/string.c | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/ext/standard/string.c b/ext/standard/string.c index 1836e2a4d6..e645cda6f6 100644 --- a/ext/standard/string.c +++ b/ext/standard/string.c @@ -1344,6 +1344,11 @@ PHPAPI void _php3_char_to_str(char *str,uint len,char from,char *to,int to_len,p *target = 0; } +#if 0 +/* + * this is a binary safe equivalent to strnstr + * note that we don't check for the end in str_to_str but here + */ static inline char * _php3_memnstr(char *haystack, char *needle, int needle_len, char *end) @@ -1409,6 +1414,55 @@ finish: return new; } +#else + +static char *_php3_memstr(char *s, char *c, size_t n, size_t m) +{ + char *p; + + for(p = s; (p - s) < n; p++) + if(memcmp(p, c, m) == 0) + return p; + return NULL; +} + +#define ATTCHSTR(st, sz) \ + nl += sz; \ + n = erealloc(n, nl + 1); \ + memcpy(n + no, st, sz); \ + no += sz + + +PHPAPI char *_php3_str_to_str(char *a, int al, char *b, int bl, char *c, int cl, + int *newlen) +{ + char *n = NULL, *p, *q; + int nl = 0; + int no = 0; + + /* run through all occurences of b in a */ + for(p = q = a; (p = _php3_memstr(p, b, al - (p - a), bl)); q = p) { + /* attach everything between the previous occ. and this one */ + ATTCHSTR(q, p - q); + /* attach the replacement string c */ + ATTCHSTR(c, cl); + /* jump over string b in a */ + p += bl; + } + + /* anything left over ? */ + if((al - (q - a)) > 0) { + ATTCHSTR(q, al - (q - a)); + } + + if(newlen) *newlen = nl; + n[nl] = '\0'; + + return n; +} + +#undef ATTCHSTR +#endif /* {{{ proto string str_replace(string needle, string str, string haystack) Replace all occurrences of needle in haystack with str */ |