usr.sbin/zic/ialloc.c

   1 #ifndef lint
   2 #ifndef NOID
   3 static char     elsieid[] = "@(#)ialloc.c       8.29";
   4 #endif /* !defined NOID */
   5 #endif /* !defined lint */
   6
   7 /*
   8  * @(#)ialloc.c 8.29
   9  * $FreeBSD: src/usr.sbin/zic/ialloc.c,v 1.5 1999/08/28 01:21:18 peter Exp $
  10  * $DragonFly: src/usr.sbin/zic/ialloc.c,v 1.4 2004/12/18 22:48:15 swildner Exp $
  11  */
  12 /*LINTLIBRARY*/
  13
  14 #include "private.h"
  15
  16 #define nonzero(n)      (((n) == 0) ? 1 : (n))
  17
  18 char *
  19 imalloc(const int n)
  20 {
  21         return malloc((size_t) nonzero(n));
  22 }
  23
  24 char *
  25 icalloc(int nelem, int elsize)
  26 {
  27         if (nelem == 0 || elsize == 0)
  28                 nelem = elsize = 1;
  29         return calloc((size_t) nelem, (size_t) elsize);
  30 }
  31
  32 void *
  33 irealloc(void *const pointer, const int size)
  34 {
  35         if (pointer == NULL)
  36                 return imalloc(size);
  37         return realloc((void *) pointer, (size_t) nonzero(size));
  38 }
  39
  40 char *
  41 icatalloc(char *const old, const char *new)
  42 {
  43         char *result;
  44         int oldsize, newsize;
  45
  46         newsize = (new == NULL) ? 0 : strlen(new);
  47         if (old == NULL)
  48                 oldsize = 0;
  49         else if (newsize == 0)
  50                 return old;
  51         else    oldsize = strlen(old);
  52         if ((result = irealloc(old, oldsize + newsize + 1)) != NULL)
  53                 if (new != NULL)
  54                         strcpy(result + oldsize, new);
  55         return result;
  56 }
  57
  58 char *
  59 icpyalloc(const char *string)
  60 {
  61         return icatalloc((char *) NULL, string);
  62 }
  63
  64 void
  65 ifree(char * const p)
  66 {
  67         if (p != NULL)
  68                 free(p);
  69 }
  70
  71 void
  72 icfree(char * const p)
  73 {
  74         if (p != NULL)
  75                 free(p);
  76 }