zic.tproj/ialloc.c

   1 #include <sys/cdefs.h>
   2 #ifndef lint
   3 #ifndef NOID
   4 __unused static const char      elsieid[] = "@(#)ialloc.c       8.29";
   5 #endif /* !defined NOID */
   6 #endif /* !defined lint */
   7
   8 #ifndef lint
   9 __unused static const char rcsid[] =
  10   "$FreeBSD: src/usr.sbin/zic/ialloc.c,v 1.6 2000/11/28 18:18:56 charnier Exp $";
  11 #endif /* not lint */
  12
  13 /*LINTLIBRARY*/
  14
  15 #include "private.h"
  16
  17 #define nonzero(n)      (((n) == 0) ? 1 : (n))
  18
  19 char *
  20 imalloc(const size_t n)
  21 {
  22         return malloc(nonzero(n));
  23 }
  24
  25 char *
  26 icalloc(size_t nelem, size_t elsize)
  27 {
  28         if (nelem == 0 || elsize == 0)
  29                 nelem = elsize = 1;
  30         return calloc(nelem, elsize);
  31 }
  32
  33 void *
  34 irealloc(void * const pointer, const size_t size)
  35 {
  36         if (pointer == NULL)
  37                 return imalloc(size);
  38         return realloc((void *) pointer, nonzero(size));
  39 }
  40
  41 char *
  42 icatalloc(char * const old, const char * const new)
  43 {
  44         char *  result;
  45         size_t  oldsize, newsize;
  46
  47         newsize = (new == NULL) ? 0 : strlen(new);
  48         if (old == NULL)
  49                 oldsize = 0;
  50         else if (newsize == 0)
  51                 return old;
  52         else    oldsize = strlen(old);
  53         if ((result = irealloc(old, oldsize + newsize + 1)) != NULL)
  54                 if (new != NULL)
  55                         (void) strcpy(result + oldsize, new);
  56         return result;
  57 }
  58
  59 char *
  60 icpyalloc(const char * const string)
  61 {
  62         return icatalloc((char *) NULL, string);
  63 }
  64
  65 void
  66 ifree(char * const p)
  67 {
  68         if (p != NULL)
  69                 (void) free(p);
  70 }
  71
  72 void
  73 icfree(char * const p)
  74 {
  75         if (p != NULL)
  76                 (void) free(p);
  77 }