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/* $Id$ */
/***
This file is part of avahi.
avahi is free software; you can redistribute it and/or modify it
under the terms of the GNU Lesser General Public License as
published by the Free Software Foundation; either version 2.1 of the
License, or (at your option) any later version.
avahi is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General
Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with avahi; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
USA.
***/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <stdlib.h>
#include <string.h>
#include <assert.h>
#include <stdio.h>
#include <unistd.h>
#include "malloc.h"
#ifndef va_copy
#ifdef __va_copy
#define va_copy(DEST,SRC) __va_copy((DEST),(SRC))
#else
#define va_copy(DEST,SRC) memcpy(&(DEST), &(SRC), sizeof(va_list))
#endif
#endif
static const AvahiAllocator *allocator = NULL;
static void oom(void) AVAHI_GCC_NORETURN;
static void oom(void) {
static const char msg[] = "Out of memory, aborting ...\n";
const char *n = msg;
while (strlen(n) > 0) {
ssize_t r;
if ((r = write(2, n, strlen(n))) < 0)
break;
n += r;
}
abort();
}
/* Default implementation for avahi_malloc() */
static void* xmalloc(size_t size) {
void *p;
if (size == 0)
return NULL;
if (!(p = malloc(size)))
oom();
return p;
}
/* Default implementation for avahi_realloc() */
static void *xrealloc(void *p, size_t size) {
if (size == 0) {
free(p);
return NULL;
}
if (!(p = realloc(p, size)))
oom();
return p;
}
/* Default implementation for avahi_calloc() */
static void *xcalloc(size_t nmemb, size_t size) {
void *p;
if (size == 0 || nmemb == 0)
return NULL;
if (!(p = calloc(nmemb, size)))
oom();
return p;
}
void *avahi_malloc(size_t size) {
if (size <= 0)
return NULL;
if (!allocator)
return xmalloc(size);
assert(allocator->malloc);
return allocator->malloc(size);
}
void *avahi_malloc0(size_t size) {
void *p;
if (size <= 0)
return NULL;
if (!allocator)
return xcalloc(1, size);
if (allocator->calloc)
return allocator->calloc(1, size);
assert(allocator->malloc);
if ((p = allocator->malloc(size)))
memset(p, 0, size);
return p;
}
void avahi_free(void *p) {
if (!p)
return;
if (!allocator) {
free(p);
return;
}
assert(allocator->free);
allocator->free(p);
}
void *avahi_realloc(void *p, size_t size) {
if (size == 0) {
avahi_free(p);
return NULL;
}
if (!allocator)
return xrealloc(p, size);
assert(allocator->realloc);
return allocator->realloc(p, size);
}
char *avahi_strdup(const char *s) {
char *r;
size_t size;
if (!s)
return NULL;
size = strlen(s);
if (!(r = avahi_malloc(size+1)))
return NULL;
memcpy(r, s, size+1);
return r;
}
char *avahi_strndup(const char *s, size_t max) {
char *r;
size_t size;
const char *p;
if (!s)
return NULL;
for (p = s, size = 0;
size < max && *p;
p++, size++);
if (!(r = avahi_new(char, size+1)))
return NULL;
memcpy(r, s, size);
r[size] = 0;
return r;
}
/* Change the allocator */
void avahi_set_allocator(const AvahiAllocator *a) {
allocator = a;
}
char *avahi_strdup_vprintf(const char *fmt, va_list ap) {
size_t len = 80;
char *buf;
assert(fmt);
if (!(buf = avahi_malloc(len)))
return NULL;
for (;;) {
int n;
char *nbuf;
va_list ap2;
va_copy (ap2, ap);
n = vsnprintf(buf, len, fmt, ap2);
va_end (ap2);
if (n >= 0 && n < (int) len)
return buf;
if (n >= 0)
len = n+1;
else
len *= 2;
if (!(nbuf = avahi_realloc(buf, len))) {
avahi_free(buf);
return NULL;
}
buf = nbuf;
}
}
char *avahi_strdup_printf(const char *fmt, ... ) {
char *s;
va_list ap;
assert(fmt);
va_start(ap, fmt);
s = avahi_strdup_vprintf(fmt, ap);
va_end(ap);
return s;
}
void *avahi_memdup(const void *s, size_t l) {
void *p;
assert(s);
if (!(p = avahi_malloc(l)))
return NULL;
memcpy(p, s, l);
return p;
}
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