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/*-
* tirc -- client for the Internet Relay Chat
*
* Copyright (c) 1996, 1997, 1998
* Matthias Buelow. All rights reserved.
*
* See the file ``COPYRIGHT'' for the usage and distribution
* license and warranty disclaimer.
*/
#ifndef lint
static char rcsid[] = "$Id: compat.c,v 1.17 1998/02/02 03:41:29 mkb Exp $";
#endif
#include "tirc.h"
#ifdef HAVE_STRING_H
#include <string.h>
#elif defined(HAVE_MEMORY_H)
#include <memory.h>
#endif
#ifdef HAVE_MALLOC_H
#include <malloc.h>
#endif
#include "compat.h"
#ifndef __STDC__
#define MAXFUNC 16 /* maximum number of functions to be registered */
void (*funcs[MAXFUNC]) __P((void));
int funcreg = 0;
#endif
/* Save a copy of a string */
char *
Strdup(str)
const char *str;
{
#ifdef HAVE_STRDUP
return strdup(str);
#else
char *s;
int l;
l = strlen(str);
if ((s = malloc(l+1)) != NULL)
memmove(s, str, l+1);
return s;
#endif /* HAVE_STRDUP */
}
/*
* Register a function to be called at Exit().
* This is a simple implementation that can only hold MAXFUNC functions.
*/
int
Atexit(func)
void (*func) __P((void));
{
#ifdef __STDC__
return atexit(func);
#else
if (funcreg < MAXFUNC) {
funcs[funcreg++] = func;
return 0;
}
errno = ENOMEM;
return -1;
#endif
}
void
Exit(status)
int status;
{
#ifdef __STDC__
exit(status);
#else
int i;
for (i = 0; i < funcreg; i++)
(*funcs[i])();
exit(status);
#endif
}
#ifndef HAVE_BASENAME
char *
basename(s)
char *s;
{
static char def[] = ".";
char *t;
if (s == NULL || !strlen(s))
return def;
t = s + strlen(s);
while (t > s && *t != '/')
t--;
if (*t == '/' && *(t+1))
t++;
return t;
}
#endif
/*
* Returns system memory page size or -1 on error.
*/
int
Getpagesize()
{
#ifdef HAVE_GETPAGESIZE
return getpagesize();
#elif defined(HAVE_SYSCONF)
return sysconf(_SC_PAGESIZE);
#elif defined(NBPG)
return NBPG;
#else
/* whoops, how shall we get the pagesize? */
return -1;
#endif
}
/*
* Returns the appropriate error message for errno.
*/
char *
Strerror(en)
int en;
{
#ifdef HAVE_STRERROR
return strerror(en);
#else
return sys_errlist[en];
#endif
}
#ifndef HAVE_LABS
/*
* Computes the absolute value of a long integer.
*/
long
labs(i)
long i;
{
return i < 0 ? -i : i;
}
#endif /* !HAVE_LABS */
#ifndef HAVE_ABS
/*
* Same as labs for normal integers.
*/
int
abs(i)
int i;
{
return i < 0 ? -i : i;
}
#endif /* !HAVE_ABS */
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