3 * @(#)regsub.c 1.3 of 2 April 86
5 * Copyright (c) 1986 by University of Toronto.
6 * Written by Henry Spencer. Not derived from licensed software.
8 * Permission is granted to anyone to use this software for any
9 * purpose on any computer system, and to redistribute it freely,
10 * subject to the following restrictions:
12 * 1. The author is not responsible for the consequences of use of
13 * this software, no matter how awful, even if they arise
16 * 2. The origin of this software must not be misrepresented, either
17 * by explicit claim or by omission.
19 * 3. Altered versions must be plainly marked as such, and must not
20 * be misrepresented as being the original software.
23 * This code was modified by Ethan Sommer to work within the kernel
24 * (it now uses kmalloc etc..)
29 #include <linux/string.h>
33 #define UCHARAT(p) ((int)*(unsigned char *)(p))
35 #define UCHARAT(p) ((int)*(p)&CHARBITS)
39 //void regerror(char * s)
41 // printk("regexp(3): %s", s);
47 - regsub - perform substitutions after a regexp match
50 regsub(regexp
* prog
, char * source
, char * dest
)
58 /* Not necessary and gcc doesn't like it -MLS */
59 /*extern char *strncpy();*/
61 if (prog
== NULL
|| source
== NULL
|| dest
== NULL
) {
62 regerror("NULL parm to regsub");
65 if (UCHARAT(prog
->program
) != MAGIC
) {
66 regerror("damaged regexp fed to regsub");
72 while ((c
= *src
++) != '\0') {
75 else if (c
== '\\' && '0' <= *src
&& *src
<= '9')
80 if (no
< 0) { /* Ordinary character. */
81 if (c
== '\\' && (*src
== '\\' || *src
== '&'))
84 } else if (prog
->startp
[no
] != NULL
&& prog
->endp
[no
] != NULL
) {
85 len
= prog
->endp
[no
] - prog
->startp
[no
];
86 (void) strncpy(dst
, prog
->startp
[no
], len
);
88 if (len
!= 0 && *(dst
-1) == '\0') { /* strncpy hit NUL. */
89 regerror("damaged match string");