src/xmalloc.c

   1 /*
   2  * transsip - the telephony toolkit
   3  * By Daniel Borkmann <daniel@transsip.org>
   4  * Copyright 2011, 2012 Daniel Borkmann <dborkma@tik.ee.ethz.ch>,
   5  * Swiss federal institute of technology (ETH Zurich)
   6  * Subject to the GPL, version 2.
   7  */
   8
   9 #include <stdarg.h>
  10 #include <stdio.h>
  11 #include <stdlib.h>
  12 #include <string.h>
  13 #include <unistd.h>
  14 #include <malloc.h>
  15
  16 #include "built-in.h"
  17 #include "xmalloc.h"
  18 #include "die.h"
  19 #include "xutils.h"
  20
  21 __hidden void *xmalloc(size_t size)
  22 {
  23         void *ptr;
  24
  25         if (size == 0)
  26                 panic("xmalloc: zero size\n");
  27
  28         ptr = malloc(size);
  29         if (ptr == NULL)
  30                 panic("xmalloc: out of memory (allocating %zu bytes)\n", size);
  31
  32         return ptr;
  33 }
  34
  35 __hidden void *xzmalloc(size_t size)
  36 {
  37         void *ptr;
  38
  39         if (size == 0)
  40                 panic("xzmalloc: zero size\n");
  41
  42         ptr = malloc(size);
  43         if (ptr == NULL)
  44                 panic("xzmalloc: out of memory (allocating %zu bytes)\n", size);
  45
  46         memset(ptr, 0, size);
  47
  48         return ptr;
  49 }
  50
  51 __hidden void *xmalloc_aligned(size_t size, size_t alignment)
  52 {
  53         int ret;
  54         void *ptr;
  55
  56         if (size == 0)
  57                 panic("xmalloc_aligned: zero size\n");
  58
  59         ret = posix_memalign(&ptr, alignment, size);
  60         if (ret != 0)
  61                 panic("xmalloc_aligned: out of memory (allocating %zu bytes)\n",
  62                       size);
  63
  64         return ptr;
  65 }
  66
  67 __hidden void *xrealloc(void *ptr, size_t nmemb, size_t size)
  68 {
  69         void *new_ptr;
  70         size_t new_size = nmemb * size;
  71
  72         if (unlikely(new_size == 0))
  73                 panic("xrealloc: zero size\n");
  74
  75         if (unlikely(((size_t) ~0) / nmemb < size))
  76                 panic("xrealloc: nmemb * size > SIZE_T_MAX\n");
  77
  78         if (ptr == NULL)
  79                 new_ptr = malloc(new_size);
  80         else
  81                 new_ptr = realloc(ptr, new_size);
  82
  83         if (unlikely(new_ptr == NULL))
  84                 panic("xrealloc: out of memory (new_size %zu bytes)\n",
  85                       new_size);
  86
  87         return new_ptr;
  88 }
  89
  90 __hidden void xfree(void *ptr)
  91 {
  92         if (ptr == NULL)
  93                 panic("xfree: NULL pointer given as argument\n");
  94
  95         free(ptr);
  96 }
  97
  98 __hidden char *xstrdup(const char *str)
  99 {
 100         size_t len;
 101         char *cp;
 102
 103         len = strlen(str) + 1;
 104         cp = xmalloc(len);
 105         strlcpy(cp, str, len);
 106
 107         return cp;
 108 }