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| author | Christopher Faylor <me@cgf.cx> | 2000-02-17 19:38:31 +0000 |
|---|---|---|
| committer | Christopher Faylor <me@cgf.cx> | 2000-02-17 19:38:31 +0000 |
| commit | 369d8a8fd5e887eca547bf34bccfdf755c9e5397 (patch) | |
| tree | 5c5dc851bf01a5938662571357ffd5d7bb152a79 /winsup/cygwin/regexp/regsub.c | |
| parent | 4415a7ef3e26c669f5f7c5c7efbf7b6ea9b7e2f4 (diff) | |
| download | newlib-369d8a8fd5e887eca547bf34bccfdf755c9e5397.zip newlib-369d8a8fd5e887eca547bf34bccfdf755c9e5397.tar.gz newlib-369d8a8fd5e887eca547bf34bccfdf755c9e5397.tar.bz2 | |
import winsup-2000-02-17 snapshot
Diffstat (limited to 'winsup/cygwin/regexp/regsub.c')
| -rw-r--r-- | winsup/cygwin/regexp/regsub.c | 87 |
1 files changed, 87 insertions, 0 deletions
diff --git a/winsup/cygwin/regexp/regsub.c b/winsup/cygwin/regexp/regsub.c new file mode 100644 index 0000000..3983cc5 --- /dev/null +++ b/winsup/cygwin/regexp/regsub.c @@ -0,0 +1,87 @@ +/* + * regsub + * + * Copyright (c) 1986 by University of Toronto. + * Written by Henry Spencer. Not derived from licensed software. + * + * Permission is granted to anyone to use this software for any + * purpose on any computer system, and to redistribute it freely, + * subject to the following restrictions: + * + * 1. The author is not responsible for the consequences of use of + * this software, no matter how awful, even if they arise + * from defects in it. + * + * 2. The origin of this software must not be misrepresented, either + * by explicit claim or by omission. + * + * 3. Altered versions must be plainly marked as such, and must not + * be misrepresented as being the original software. + */ + +#if 0 +#ifndef lint +static char *rcsid = "$Id$"; +#endif /* not lint */ +#endif + +#include "regexp.h" +#include <stdio.h> +#include <string.h> +#include "regmagic.h" + +#ifndef CHARBITS +#define UCHARAT(p) ((int)*(unsigned char *)(p)) +#else +#define UCHARAT(p) ((int)*(p)&CHARBITS) +#endif + +/* + - regsub - perform substitutions after a regexp match + */ +void +regsub(prog, source, dest) +const regexp *prog; +const char *source; +char *dest; +{ + register char *src; + register char *dst; + register char c; + register int no; + register int len; + + if (prog == NULL || source == NULL || dest == NULL) { + regerror("NULL parm to regsub"); + return; + } + if (UCHARAT(prog->program) != MAGIC) { + regerror("damaged regexp fed to regsub"); + return; + } + + src = (char *)source; + dst = dest; + while ((c = *src++) != '\0') { + if (c == '&') + no = 0; + else if (c == '\\' && '0' <= *src && *src <= '9') + no = *src++ - '0'; + else + no = -1; + if (no < 0) { /* Ordinary character. */ + if (c == '\\' && (*src == '\\' || *src == '&')) + c = *src++; + *dst++ = c; + } else if (prog->startp[no] != NULL && prog->endp[no] != NULL) { + len = prog->endp[no] - prog->startp[no]; + (void) strncpy(dst, prog->startp[no], len); + dst += len; + if (len != 0 && *(dst-1) == '\0') { /* strncpy hit NUL. */ + regerror("damaged match string"); + return; + } + } + } + *dst++ = '\0'; +} |