util.c

   1 /*
   2  * (C)opyright MMVI Anselm R. Garbe <garbeam at gmail dot com>
   3  * See LICENSE file for license details.
   4  */
   5
   6 #include <stdarg.h>
   7 #include <stdio.h>
   8 #include <stdlib.h>
   9 #include <string.h>
  10
  11 void
  12 error(char *errstr, ...) {
  13         va_list ap;
  14         va_start(ap, errstr);
  15         vfprintf(stderr, errstr, ap);
  16         va_end(ap);
  17         exit(1);
  18 }
  19
  20 static void
  21 bad_malloc(unsigned int size)
  22 {
  23         fprintf(stderr, "fatal: could not malloc() %d bytes\n",
  24                         (int) size);
  25         exit(1);
  26 }
  27
  28 void *
  29 emallocz(unsigned int size)
  30 {
  31         void *res = calloc(1, size);
  32         if(!res)
  33                 bad_malloc(size);
  34         return res;
  35 }
  36
  37 void *
  38 emalloc(unsigned int size)
  39 {
  40         void *res = malloc(size);
  41         if(!res)
  42                 bad_malloc(size);
  43         return res;
  44 }
  45
  46 void *
  47 erealloc(void *ptr, unsigned int size)
  48 {
  49         void *res = realloc(ptr, size);
  50         if(!res)
  51                 bad_malloc(size);
  52         return res;
  53 }
  54
  55 char *
  56 estrdup(const char *str)
  57 {
  58         void *res = strdup(str);
  59         if(!res)
  60                 bad_malloc(strlen(str));
  61         return res;
  62 }
  63
  64 void
  65 failed_assert(char *a, char *file, int line)
  66 {
  67         fprintf(stderr, "Assertion \"%s\" failed at %s:%d\n", a, file, line);
  68         abort();
  69 }
  70
  71 void
  72 swap(void **p1, void **p2)
  73 {
  74         void *tmp = *p1;
  75         *p1 = *p2;
  76         *p2 = tmp;
  77 }