usr.sbin/zic/ialloc.c

   1 /*
   2 ** This file is in the public domain, so clarified as of
   3 ** 2006-07-17 by Arthur David Olson.
   4 */
   5
   6 /*
   7  * @(#)ialloc.c 8.30
   8  * $FreeBSD: src/usr.sbin/zic/ialloc.c,v 1.5 1999/08/28 01:21:18 peter Exp $
   9  * $DragonFly: src/usr.sbin/zic/ialloc.c,v 1.5 2008/10/19 20:15:58 swildner Exp $
  10  */
  11 /*LINTLIBRARY*/
  12
  13 #include "private.h"
  14
  15 #define nonzero(n)      (((n) == 0) ? 1 : (n))
  16
  17 char *
  18 imalloc(const int n)
  19 {
  20         return malloc((size_t) nonzero(n));
  21 }
  22
  23 char *
  24 icalloc(int nelem, int elsize)
  25 {
  26         if (nelem == 0 || elsize == 0)
  27                 nelem = elsize = 1;
  28         return calloc((size_t) nelem, (size_t) elsize);
  29 }
  30
  31 void *
  32 irealloc(void *const pointer, const int size)
  33 {
  34         if (pointer == NULL)
  35                 return imalloc(size);
  36         return realloc((void *) pointer, (size_t) nonzero(size));
  37 }
  38
  39 char *
  40 icatalloc(char *const old, const char *new)
  41 {
  42         char *result;
  43         int oldsize, newsize;
  44
  45         newsize = (new == NULL) ? 0 : strlen(new);
  46         if (old == NULL)
  47                 oldsize = 0;
  48         else if (newsize == 0)
  49                 return old;
  50         else    oldsize = strlen(old);
  51         if ((result = irealloc(old, oldsize + newsize + 1)) != NULL)
  52                 if (new != NULL)
  53                         strcpy(result + oldsize, new);
  54         return result;
  55 }
  56
  57 char *
  58 icpyalloc(const char *string)
  59 {
  60         return icatalloc(NULL, string);
  61 }
  62
  63 void
  64 ifree(char * const p)
  65 {
  66         if (p != NULL)
  67                 free(p);
  68 }
  69
  70 void
  71 icfree(char * const p)
  72 {
  73         if (p != NULL)
  74                 free(p);
  75 }