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222 lines
3.9 KiB
C
222 lines
3.9 KiB
C
/* $RCSfile: util.c,v $$Revision: 4.1 $$Date: 92/08/07 18:29:29 $
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*
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* Copyright (c) 1991-1997, Larry Wall
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*
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* You may distribute under the terms of either the GNU General Public
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* License or the Artistic License, as specified in the README file.
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*
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* $Log: util.c,v $
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*/
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#include "EXTERN.h"
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#include "a2p.h"
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#include "INTERN.h"
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#include "util.h"
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#include <stdarg.h>
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#define FLUSH
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static char nomem[] = "Out of memory!\n";
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/* paranoid version of malloc */
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Malloc_t
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safemalloc(MEM_SIZE size)
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{
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Malloc_t ptr;
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/* malloc(0) is NASTY on some systems */
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ptr = malloc(size ? size : 1);
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#ifdef DEBUGGING
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if (debug & 128)
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fprintf(stderr,"0x%lx: (%05d) malloc %ld bytes\n",(unsigned long)ptr,
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an++,(long)size);
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#endif
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if (ptr != Nullch)
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return ptr;
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else {
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fputs(nomem,stdout) FLUSH;
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exit(1);
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}
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/*NOTREACHED*/
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return 0;
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}
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/* paranoid version of realloc */
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Malloc_t
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saferealloc(Malloc_t where, MEM_SIZE size)
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{
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Malloc_t ptr;
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/* realloc(0) is NASTY on some systems */
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ptr = realloc(where, size ? size : 1);
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#ifdef DEBUGGING
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if (debug & 128) {
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fprintf(stderr,"0x%lx: (%05d) rfree\n",(unsigned long)where,an++);
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fprintf(stderr,"0x%lx: (%05d) realloc %ld bytes\n",(unsigned long)ptr,an++,(long)size);
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}
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#endif
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if (ptr != Nullch)
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return ptr;
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else {
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fputs(nomem,stdout) FLUSH;
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exit(1);
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}
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/*NOTREACHED*/
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return 0;
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}
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/* safe version of free */
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Free_t
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safefree(Malloc_t where)
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{
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#ifdef DEBUGGING
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if (debug & 128)
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fprintf(stderr,"0x%lx: (%05d) free\n",(unsigned long)where,an++);
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#endif
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free(where);
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}
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/* safe version of string copy */
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char *
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safecpy(char *to, register char *from, register int len)
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{
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register char *dest = to;
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if (from != Nullch)
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for (len--; len && (*dest++ = *from++); len--) ;
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*dest = '\0';
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return to;
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}
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/* copy a string up to some (non-backslashed) delimiter, if any */
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char *
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cpytill(register char *to, register char *from, register int delim)
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{
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for (; *from; from++,to++) {
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if (*from == '\\') {
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if (from[1] == delim)
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from++;
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else if (from[1] == '\\')
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*to++ = *from++;
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}
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else if (*from == delim)
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break;
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*to = *from;
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}
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*to = '\0';
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return from;
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}
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char *
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cpy2(register char *to, register char *from, register int delim)
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{
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for (; *from; from++,to++) {
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if (*from == '\\')
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*to++ = *from++;
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else if (*from == '$')
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*to++ = '\\';
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else if (*from == delim)
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break;
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*to = *from;
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}
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*to = '\0';
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return from;
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}
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/* return ptr to little string in big string, NULL if not found */
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char *
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instr(char *big, char *little)
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{
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register char *t, *s, *x;
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for (t = big; *t; t++) {
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for (x=t,s=little; *s; x++,s++) {
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if (!*x)
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return Nullch;
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if (*s != *x)
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break;
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}
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if (!*s)
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return t;
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}
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return Nullch;
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}
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/* copy a string to a safe spot */
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char *
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savestr(char *str)
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{
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register char *newaddr = (char *) safemalloc((MEM_SIZE)(strlen(str)+1));
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(void)strcpy(newaddr,str);
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return newaddr;
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}
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/* grow a static string to at least a certain length */
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void
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growstr(char **strptr, int *curlen, int newlen)
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{
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if (newlen > *curlen) { /* need more room? */
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if (*curlen)
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*strptr = (char *) saferealloc(*strptr,(MEM_SIZE)newlen);
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else
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*strptr = (char *) safemalloc((MEM_SIZE)newlen);
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*curlen = newlen;
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}
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}
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void
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croak(char *pat,...)
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{
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#if defined(HAS_VPRINTF)
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va_list args;
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va_start(args, pat);
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vfprintf(stderr,pat,args);
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#else
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fprintf(stderr,pat,a1,a2,a3,a4);
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#endif
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exit(1);
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}
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void
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fatal(char *pat,...)
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{
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#if defined(HAS_VPRINTF)
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va_list args;
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va_start(args, pat);
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vfprintf(stderr,pat,args);
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#else
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fprintf(stderr,pat,a1,a2,a3,a4);
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#endif
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exit(1);
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}
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#if defined(__APPLE_CC__)
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__private_extern__ /* warn() conflicts with libc */
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#endif
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void
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warn(char *pat,...)
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{
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#if defined(HAS_VPRINTF)
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va_list args;
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va_start(args, pat);
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vfprintf(stderr,pat,args);
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#else
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fprintf(stderr,pat,a1,a2,a3,a4);
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#endif
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}
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