lib/libc/time/ialloc.c

   1 /*      $NetBSD: ialloc.c,v 1.7 2010/01/02 10:42:49 tsutsui Exp $       */
   2 /*
   3 ** This file is in the public domain, so clarified as of
   4 ** 2006-07-17 by Arthur David Olson.
   5 */
   6
   7 #if HAVE_NBTOOL_CONFIG_H
   8 #include "nbtool_config.h"
   9 #endif
  10
  11 #include <sys/cdefs.h>
  12
  13 #if 0
  14 static char     elsieid[] = "@(#)ialloc.c       8.30";
  15 #else
  16 __RCSID("$NetBSD: ialloc.c,v 1.7 2010/01/02 10:42:49 tsutsui Exp $");
  17 #endif
  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
  64                 oldsize = strlen(old);
  65         if ((result = irealloc(old, oldsize + newsize + 1)) != NULL)
  66                 if (new != NULL)
  67                         (void) strcpy(result + oldsize, new); /* XXX strcpy is safe */
  68         return result;
  69 }
  70
  71 char *
  72 icpyalloc(string)
  73 const char * const      string;
  74 {
  75         return icatalloc((char *) NULL, string);
  76 }
  77
  78 void
  79 ifree(p)
  80 char * const    p;
  81 {
  82         if (p != NULL)
  83                 (void) free(p);
  84 }
  85
  86 void
  87 icfree(p)
  88 char * const    p;
  89 {
  90         if (p != NULL)
  91                 (void) free(p);
  92 }