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/* util.c
*
* Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1999,
* 2000, 2001, 2005 by Larry Wall and others
*
* You may distribute under the terms of either the GNU General Public
* License or the Artistic License, as specified in the README file.
*/
#include "EXTERN.h"
#include "a2p.h"
#include "INTERN.h"
#include "util.h"
#include <stdarg.h>
#define FLUSH
static const char nomem[] = "Out of memory!\n";
/* paranoid version of malloc */
Malloc_t
safemalloc(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 %ld bytes\n",(unsigned long)ptr,
an++,(long)size);
#endif
if (ptr != Nullch)
return ptr;
else {
fputs(nomem,stdout) FLUSH;
exit(1);
}
/*NOTREACHED*/
return 0;
}
/* paranoid version of realloc */
Malloc_t
saferealloc(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 %ld bytes\n",(unsigned long)ptr,an++,(long)size);
}
#endif
if (ptr != Nullch)
return ptr;
else {
fputs(nomem,stdout) FLUSH;
exit(1);
}
/*NOTREACHED*/
return 0;
}
/* safe version of free */
Free_t
safefree(Malloc_t where)
{
#ifdef DEBUGGING
if (debug & 128)
fprintf(stderr,"0x%lx: (%05d) free\n",(unsigned long)where,an++);
#endif
free(where);
}
/* copy a string up to some (non-backslashed) delimiter, if any */
char *
cpytill(register char *to, register char *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(register char *to, register char *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(char *big, char *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(char *str)
{
register char * const newaddr = (char *) safemalloc((MEM_SIZE)(strlen(str)+1));
(void)strcpy(newaddr,str);
return newaddr;
}
/* grow a static string to at least a certain length */
void
growstr(char **strptr, int *curlen, int newlen)
{
if (newlen > *curlen) { /* need more room? */
if (*curlen)
*strptr = (char *) saferealloc(*strptr,(MEM_SIZE)newlen);
else
*strptr = (char *) safemalloc((MEM_SIZE)newlen);
*curlen = newlen;
}
}
void
fatal(const char *pat,...)
{
#if defined(HAS_VPRINTF)
va_list args;
va_start(args, pat);
vfprintf(stderr,pat,args);
va_end(args);
#else
fprintf(stderr,pat,a1,a2,a3,a4);
#endif
exit(1);
}
#if defined(DARWIN)
__private_extern__ /* warn() conflicts with libc */
#endif
void
warn(const char *pat,...)
{
#if defined(HAS_VPRINTF)
va_list args;
va_start(args, pat);
vfprintf(stderr,pat,args);
va_end(args);
#else
fprintf(stderr,pat,a1,a2,a3,a4);
#endif
}
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