util.c

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