system_cmds/zic.tproj/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 #ifndef lint
   7 #ifndef NOID
   8 static const char       elsieid[] = "@(#)ialloc.c       8.30";
   9 #endif /* !defined NOID */
  10 #endif /* !defined lint */
  11
  12 #ifndef lint
  13 static const char rcsid[] =
  14   "$FreeBSD: head/contrib/tzcode/zic/ialloc.c 192625 2009-05-23 06:31:50Z edwin $";
  15 #endif /* not lint */
  16
  17 /*LINTLIBRARY*/
  18
  19 #include "private.h"
  20
  21 #define nonzero(n)      (((n) == 0) ? 1 : (n))
  22
  23 char *
  24 imalloc(n)
  25 const int       n;
  26 {
  27         return malloc((size_t) nonzero(n));
  28 }
  29
  30 char *
  31 icalloc(nelem, elsize)
  32 int     nelem;
  33 int     elsize;
  34 {
  35         if (nelem == 0 || elsize == 0)
  36                 nelem = elsize = 1;
  37         return calloc((size_t) nelem, (size_t) elsize);
  38 }
  39
  40 void *
  41 irealloc(pointer, size)
  42 void * const    pointer;
  43 const int       size;
  44 {
  45         if (pointer == NULL)
  46                 return imalloc(size);
  47         return realloc((void *) pointer, (size_t) nonzero(size));
  48 }
  49
  50 char *
  51 icatalloc(old, new)
  52 char * const            old;
  53 const char * const      new;
  54 {
  55         register char * result;
  56         register int    oldsize, newsize;
  57
  58         newsize = (new == NULL) ? 0 : strlen(new);
  59         if (old == NULL)
  60                 oldsize = 0;
  61         else if (newsize == 0)
  62                 return old;
  63         else    oldsize = strlen(old);
  64         if ((result = irealloc(old, oldsize + newsize + 1)) != NULL)
  65                 if (new != NULL)
  66                         (void) strcpy(result + oldsize, new);
  67         return result;
  68 }
  69
  70 char *
  71 icpyalloc(string)
  72 const char * const      string;
  73 {
  74         return icatalloc((char *) NULL, string);
  75 }
  76
  77 void
  78 ifree(p)
  79 char * const    p;
  80 {
  81         if (p != NULL)
  82                 (void) free(p);
  83 }
  84
  85 void
  86 icfree(p)
  87 char * const    p;
  88 {
  89         if (p != NULL)
  90                 (void) free(p);
  91 }