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/*
* Copyright (C) 2010 Davidlohr Bueso <dave@gnu.org>
*
* This file may be redistributed under the terms of the
* GNU Lesser General Public License.
*
* General memory allocation wrappers for malloc, realloc, calloc and strdup
*/
#ifndef UTIL_LINUX_XALLOC_H
#define UTIL_LINUX_XALLOC_H
#include <stdlib.h>
#include <string.h>
#include "c.h"
#ifndef XALLOC_EXIT_CODE
# define XALLOC_EXIT_CODE EXIT_FAILURE
#endif
static inline void __attribute__((__noreturn__))
__err_oom(const char *file, unsigned int line)
{
err(XALLOC_EXIT_CODE, "%s: %u: cannot allocate memory", file, line);
}
#define err_oom() __err_oom(__FILE__, __LINE__)
static inline __ul_alloc_size(1) __ul_returns_nonnull
void *xmalloc(const size_t size)
{
void *ret = malloc(size);
if (!ret && size)
err(XALLOC_EXIT_CODE, "cannot allocate %zu bytes", size);
return ret;
}
static inline __ul_alloc_size(2) __ul_returns_nonnull
void *xrealloc(void *ptr, const size_t size)
{
void *ret = realloc(ptr, size);
if (!ret && size)
err(XALLOC_EXIT_CODE, "cannot allocate %zu bytes", size);
return ret;
}
static inline __ul_calloc_size(1, 2) __ul_returns_nonnull
void *xcalloc(const size_t nelems, const size_t size)
{
void *ret = calloc(nelems, size);
if (!ret && size && nelems)
err(XALLOC_EXIT_CODE, "cannot allocate %zu bytes", size);
return ret;
}
static inline char __attribute__((warn_unused_result)) __ul_returns_nonnull
*xstrdup(const char *str)
{
char *ret;
if (!str)
return NULL;
ret = strdup(str);
if (!ret)
err(XALLOC_EXIT_CODE, "cannot duplicate string");
return ret;
}
static inline char * __attribute__((warn_unused_result)) __ul_returns_nonnull
xstrndup(const char *str, size_t size)
{
char *ret;
if (!str)
return NULL;
ret = strndup(str, size);
if (!ret)
err(XALLOC_EXIT_CODE, "cannot duplicate string");
return ret;
}
static inline int __attribute__ ((__format__(printf, 2, 3)))
xasprintf(char **strp, const char *fmt, ...)
{
int ret;
va_list args;
va_start(args, fmt);
ret = vasprintf(&(*strp), fmt, args);
va_end(args);
if (ret < 0)
err(XALLOC_EXIT_CODE, "cannot allocate string");
return ret;
}
static inline int __attribute__ ((__format__(printf, 2, 0)))
xvasprintf(char **strp, const char *fmt, va_list ap)
{
int ret = vasprintf(&(*strp), fmt, ap);
if (ret < 0)
err(XALLOC_EXIT_CODE, "cannot allocate string");
return ret;
}
static inline char * __attribute__((warn_unused_result)) xgethostname(void)
{
char *name;
size_t sz = get_hostname_max() + 1;
name = xmalloc(sizeof(char) * sz);
if (gethostname(name, sz) != 0) {
free(name);
return NULL;
}
name[sz - 1] = '\0';
return name;
}
#endif
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