zic.tproj/ialloc.c

   1 /*
   2  * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
   7  *
   8  * This file contains Original Code and/or Modifications of Original Code
   9  * as defined in and that are subject to the Apple Public Source License
  10  * Version 2.0 (the 'License'). You may not use this file except in
  11  * compliance with the License. Please obtain a copy of the License at
  12  * http://www.opensource.apple.com/apsl/ and read it before using this
  13  * file.
  14  *
  15  * The Original Code and all software distributed under the License are
  16  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  17  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  18  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  20  * Please see the License for the specific language governing rights and
  21  * limitations under the License.
  22  *
  23  * @APPLE_LICENSE_HEADER_END@
  24  */
  25 #if defined(LIBC_SCCS) && !defined(lint)
  26 #if 0
  27 static char     elsieid[] = "@(#)ialloc.c       8.28";
  28 #else
  29 static char rcsid[] = "$OpenBSD: ialloc.c,v 1.3 1997/01/14 03:16:45 millert Exp $";
  30 #endif
  31 #endif /* LIBC_SCCS and not lint */
  32
  33 /*LINTLIBRARY*/
  34
  35 #include "private.h"
  36
  37 #define nonzero(n)      (((n) == 0) ? 1 : (n))
  38
  39 char *  icalloc P((int nelem, int elsize));
  40 char *  icatalloc P((char * old, const char * new));
  41 char *  icpyalloc P((const char * string));
  42 char *  imalloc P((int n));
  43 void *  irealloc P((void * pointer, int size));
  44 void    ifree P((char * pointer));
  45
  46 char *
  47 imalloc(n)
  48 const int       n;
  49 {
  50         return malloc((size_t) nonzero(n));
  51 }
  52
  53 char *
  54 icalloc(nelem, elsize)
  55 int     nelem;
  56 int     elsize;
  57 {
  58         if (nelem == 0 || elsize == 0)
  59                 nelem = elsize = 1;
  60         return calloc((size_t) nelem, (size_t) elsize);
  61 }
  62
  63 void *
  64 irealloc(pointer, size)
  65 void * const    pointer;
  66 const int       size;
  67 {
  68         if (pointer == NULL)
  69                 return imalloc(size);
  70         return realloc((void *) pointer, (size_t) nonzero(size));
  71 }
  72
  73 char *
  74 icatalloc(old, new)
  75 char * const            old;
  76 const char * const      new;
  77 {
  78         register char * result;
  79         register int    oldsize, newsize;
  80
  81         newsize = (new == NULL) ? 0 : strlen(new);
  82         if (old == NULL)
  83                 oldsize = 0;
  84         else if (newsize == 0)
  85                 return old;
  86         else    oldsize = strlen(old);
  87         if ((result = irealloc(old, oldsize + newsize + 1)) != NULL)
  88                 if (new != NULL)
  89                         (void) strcpy(result + oldsize, new);
  90         return result;
  91 }
  92
  93 char *
  94 icpyalloc(string)
  95 const char * const      string;
  96 {
  97         return icatalloc((char *) NULL, string);
  98 }
  99
 100 void
 101 ifree(p)
 102 char * const    p;
 103 {
 104         if (p != NULL)
 105                 (void) free(p);
 106 }
 107
 108 void
 109 icfree(p)
 110 char * const    p;
 111 {
 112         if (p != NULL)
 113                 (void) free(p);
 114 }