Giacomo Tesio
e70feee4a3
With this commit all functions declared in libc.h have been renamed with the "jehanne_" prefix. This is done for several reason: - it removes conflicts during symbol resolution when linking standard C libraries like newlib or musl - it allows programs depending on a standard C library to directly link to a library depending on our non standard libc (eg libsec). To ease transiction two files are provided: - sys/include/lib9.h that can be included instead of <libc.h> to use the old names (via a simple set of macros) - sys/src/lib/c/lib9.c that can be compiled with a program where the macro provided by lib9.h are too dumb (see for example rc or grep). In the kernel port/lib.h has been modified accordingly and some of the functions it directly provides has been renamed too (eg malloc in qmalloc.c and print in devcons.c).
73 lines
1.5 KiB
C
73 lines
1.5 KiB
C
/*
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* This file is part of the UCB release of Plan 9. It is subject to the license
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* terms in the LICENSE file found in the top-level directory of this
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* distribution and at http://akaros.cs.berkeley.edu/files/Plan9License. No
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* part of the UCB release of Plan 9, including this file, may be copied,
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* modified, propagated, or distributed except according to the terms contained
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* in the LICENSE file.
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*/
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#include <u.h>
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#include <lib9.h>
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#include "regexp.h"
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/* substitute into one string using the matches from the last regexec() */
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extern void
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regsub(char *sp, /* source string */
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char *dp, /* destination string */
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int dlen,
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Resub *mp, /* subexpression elements */
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int ms) /* number of elements pointed to by mp */
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{
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char *ssp, *ep;
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int i;
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ep = dp+dlen-1;
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while(*sp != '\0'){
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if(*sp == '\\'){
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switch(*++sp){
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case '0':
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case '1':
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case '2':
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case '3':
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case '4':
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case '5':
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case '6':
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case '7':
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case '8':
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case '9':
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i = *sp-'0';
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if(mp!=0 && mp[i].sp != 0 && ms>i)
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for(ssp = mp[i].sp;
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ssp < mp[i].ep;
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ssp++)
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if(dp < ep)
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*dp++ = *ssp;
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break;
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case '\\':
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if(dp < ep)
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*dp++ = '\\';
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break;
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case '\0':
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sp--;
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break;
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default:
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if(dp < ep)
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*dp++ = *sp;
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break;
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}
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}else if(*sp == '&'){
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if(mp!=0 && mp[0].sp != 0 && ms>0)
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for(ssp = mp[0].sp;
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ssp < mp[0].ep; ssp++)
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if(dp < ep)
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*dp++ = *ssp;
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}else{
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if(dp < ep)
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*dp++ = *sp;
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}
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sp++;
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}
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*dp = '\0';
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}
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