icuSources/tools/tzcode/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 char     elsieid[] = "@(#)ialloc.c       8.30";
   9 #endif /* !defined NOID */
  10 #endif /* !defined lint */
  11
  12 /*LINTLIBRARY*/
  13
  14 #include "private.h"
  15
  16 #define nonzero(n)      (((n) == 0) ? 1 : (n))
  17
  18 char *
  19 imalloc(n)
  20 const int       n;
  21 {
  22         return malloc((size_t) nonzero(n));
  23 }
  24
  25 char *
  26 icalloc(nelem, elsize)
  27 int     nelem;
  28 int     elsize;
  29 {
  30         if (nelem == 0 || elsize == 0)
  31                 nelem = elsize = 1;
  32         return calloc((size_t) nelem, (size_t) elsize);
  33 }
  34
  35 void *
  36 irealloc(pointer, size)
  37 void * const    pointer;
  38 const int       size;
  39 {
  40         if (pointer == NULL)
  41                 return imalloc(size);
  42         return realloc((void *) pointer, (size_t) nonzero(size));
  43 }
  44
  45 char *
  46 icatalloc(old, new)
  47 char * const            old;
  48 const char * const      new;
  49 {
  50         register char * result;
  51         register int    oldsize, newsize;
  52
  53         newsize = (new == NULL) ? 0 : strlen(new);
  54         if (old == NULL)
  55                 oldsize = 0;
  56         else if (newsize == 0)
  57                 return old;
  58         else    oldsize = strlen(old);
  59         if ((result = irealloc(old, oldsize + newsize + 1)) != NULL)
  60                 if (new != NULL)
  61                         (void) strcpy(result + oldsize, new);
  62         return result;
  63 }
  64
  65 char *
  66 icpyalloc(string)
  67 const char * const      string;
  68 {
  69         return icatalloc((char *) NULL, string);
  70 }
  71
  72 void
  73 ifree(p)
  74 char * const    p;
  75 {
  76         if (p != NULL)
  77                 (void) free(p);
  78 }
  79
  80 void
  81 icfree(p)
  82 char * const    p;
  83 {
  84         if (p != NULL)
  85                 (void) free(p);
  86 }