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/* $RCSfile: util.c,v $$Revision: 4.1 $$Date: 92/08/07 18:29:29 $
*
* Copyright (c) 1991-1997, Larry Wall
*
* You may distribute under the terms of either the GNU General Public
* License or the Artistic License, as specified in the README file.
*
* $Log: util.c,v $
*/
#include "EXTERN.h"
#include "a2p.h"
#include "INTERN.h"
#include "util.h"
#ifdef I_STDARG
# include <stdarg.h>
#endif
#define FLUSH
static char nomem[] = "Out of memory!\n";
/* paranoid version of malloc */
Malloc_t
safemalloc(size)
MEM_SIZE size;
{
Malloc_t ptr;
/* malloc(0) is NASTY on some systems */
ptr = malloc(size ? size : 1);
#ifdef DEBUGGING
if (debug & 128)
fprintf(stderr,"0x%lx: (%05d) malloc %d bytes\n",(unsigned long)ptr,
an++,size);
#endif
if (ptr != Nullch)
return ptr;
else {
fputs(nomem,stdout) FLUSH;
exit(1);
}
/*NOTREACHED*/
}
/* paranoid version of realloc */
Malloc_t
saferealloc(where,size)
Malloc_t where;
MEM_SIZE size;
{
Malloc_t ptr;
/* realloc(0) is NASTY on some systems */
ptr = realloc(where, size ? size : 1);
#ifdef DEBUGGING
if (debug & 128) {
fprintf(stderr,"0x%lx: (%05d) rfree\n",(unsigned long)where,an++);
fprintf(stderr,"0x%lx: (%05d) realloc %d bytes\n",(unsigned long)ptr,an++,size);
}
#endif
if (ptr != Nullch)
return ptr;
else {
fputs(nomem,stdout) FLUSH;
exit(1);
}
/*NOTREACHED*/
}
/* safe version of free */
Free_t
safefree(where)
Malloc_t where;
{
#ifdef DEBUGGING
if (debug & 128)
fprintf(stderr,"0x%lx: (%05d) free\n",(unsigned long)where,an++);
#endif
free(where);
}
/* safe version of string copy */
char *
safecpy(to,from,len)
char *to;
register char *from;
register int len;
{
register char *dest = to;
if (from != Nullch)
for (len--; len && (*dest++ = *from++); len--) ;
*dest = '\0';
return to;
}
/* copy a string up to some (non-backslashed) delimiter, if any */
char *
cpytill(to,from,delim)
register char *to, *from;
register int delim;
{
for (; *from; from++,to++) {
if (*from == '\\') {
if (from[1] == delim)
from++;
else if (from[1] == '\\')
*to++ = *from++;
}
else if (*from == delim)
break;
*to = *from;
}
*to = '\0';
return from;
}
char *
cpy2(to,from,delim)
register char *to, *from;
register int delim;
{
for (; *from; from++,to++) {
if (*from == '\\')
*to++ = *from++;
else if (*from == '$')
*to++ = '\\';
else if (*from == delim)
break;
*to = *from;
}
*to = '\0';
return from;
}
/* return ptr to little string in big string, NULL if not found */
char *
instr(big, little)
char *big, *little;
{
register char *t, *s, *x;
for (t = big; *t; t++) {
for (x=t,s=little; *s; x++,s++) {
if (!*x)
return Nullch;
if (*s != *x)
break;
}
if (!*s)
return t;
}
return Nullch;
}
/* copy a string to a safe spot */
char *
savestr(str)
char *str;
{
register char *newaddr = safemalloc((MEM_SIZE)(strlen(str)+1));
(void)strcpy(newaddr,str);
return newaddr;
}
/* grow a static string to at least a certain length */
void
growstr(strptr,curlen,newlen)
char **strptr;
int *curlen;
int newlen;
{
if (newlen > *curlen) { /* need more room? */
if (*curlen)
*strptr = saferealloc(*strptr,(MEM_SIZE)newlen);
else
*strptr = safemalloc((MEM_SIZE)newlen);
*curlen = newlen;
}
}
void
#if defined(I_STDARG) && defined(HAS_VPRINTF)
croak(char *pat,...)
#else /* I_STDARG */
/*VARARGS1*/
croak(pat,a1,a2,a3,a4)
char *pat;
int a1,a2,a3,a4;
#endif /* I_STDARG */
{
#if defined(I_STDARG) && defined(HAS_VPRINTF)
va_list args;
va_start(args, pat);
vfprintf(stderr,pat,args);
#else
fprintf(stderr,pat,a1,a2,a3,a4);
#endif
exit(1);
}
void
#if defined(I_STDARG) && defined(HAS_VPRINTF)
fatal(char *pat,...)
#else /* I_STDARG */
/*VARARGS1*/
fatal(pat,a1,a2,a3,a4)
char *pat;
int a1,a2,a3,a4;
#endif /* I_STDARG */
{
#if defined(I_STDARG) && defined(HAS_VPRINTF)
va_list args;
va_start(args, pat);
vfprintf(stderr,pat,args);
#else
fprintf(stderr,pat,a1,a2,a3,a4);
#endif
exit(1);
}
void
#if defined(I_STDARG) && defined(HAS_VPRINTF)
warn(char *pat,...)
#else /* I_STDARG */
/*VARARGS1*/
warn(pat,a1,a2,a3,a4)
char *pat;
int a1,a2,a3,a4;
#endif /* I_STDARG */
{
#if defined(I_STDARG) && defined(HAS_VPRINTF)
va_list args;
va_start(args, pat);
vfprintf(stderr,pat,args);
#else
fprintf(stderr,pat,a1,a2,a3,a4);
#endif
}
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