diff options
Diffstat (limited to 'regexp.c')
| -rw-r--r-- | regexp.c | 40 |
1 files changed, 26 insertions, 14 deletions
@@ -7,7 +7,7 @@ #include <ctype.h> -#if ( defined BB_GREP || defined BB_FIND ) +#if ( defined BB_GREP || defined BB_FIND || defined BB_SED) /* This also tries to find a needle in a haystack, but uses * real regular expressions.... The fake regular expression @@ -25,27 +25,39 @@ extern int find_match(char *haystack, char *needle, int ignoreCase) return( status); } +#if defined BB_SED /* This performs substitutions after a regexp match has been found. * The new string is returned. It is malloc'ed, and do must be freed. */ -extern char* replace_match(char *haystack, char *needle, char *newNeedle, int ignoreCase) +extern int replace_match(char *haystack, char *needle, char *newNeedle, int ignoreCase) { int status; - char* newHaystack; struct regexp* re; - newHaystack = (char *)malloc((unsigned)(strlen(haystack) - - strlen(needle) + strlen(newNeedle)); + char *s, buf[BUF_SIZE], *d = buf; + re = regcomp( needle); status = regexec(re, haystack, FALSE, ignoreCase); - - return( newHaystack) -} - - -extern void regsub(regexp* re, char* src, char* dst) - + if (status==TRUE) { + s=haystack; + + do { + /* copy stuff from before the match */ + while (s < re->startp[0]) + *d++ = *s++; + /* substitute for the matched part */ + regsub(re, newNeedle, d); + s = re->endp[0]; + d += strlen(d); + } while (regexec(re, s, FALSE, ignoreCase) == TRUE); + /* copy stuff from after the match */ + while ( (*d++ = *s++) ) {} + d[-1] = '\n'; + d[0] = '\0'; + strcpy(haystack, buf); + } free( re); return( status); } +#endif /* code swiped from elvis-tiny 1.4 (a clone of vi) and adjusted to @@ -695,7 +707,7 @@ extern int regexec(struct regexp* re, char* str, int bol, int ignoreCase) - +#if defined BB_SED /* This performs substitutions after a regexp match has been found. */ extern void regsub(regexp* re, char* src, char* dst) { @@ -841,7 +853,7 @@ extern void regsub(regexp* re, char* src, char* dst) if (previous1) strcpy(previous1, start); } - +#endif #endif /* BB_REGEXP */ |