mdw@git.distorted.org.uk Git - mLib/blob - alloc.c

   1 /* -*-c-*-
   2  *
   3  * $Id: alloc.c,v 1.2 1999/05/05 18:50:31 mdw Exp $
   4  *
   5  * Memory allocation functions
   6  *
   7  * (c) 1998 Straylight/Edgeware
   8  */
   9
  10 /*----- Licensing notice --------------------------------------------------*
  11  *
  12  * This file is part of the mLib utilities library.
  13  *
  14  * mLib is free software; you can redistribute it and/or modify
  15  * it under the terms of the GNU Library General Public License as
  16  * published by the Free Software Foundation; either version 2 of the
  17  * License, or (at your option) any later version.
  18  *
  19  * mLib is distributed in the hope that it will be useful,
  20  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  21  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  22  * GNU Library General Public License for more details.
  23  *
  24  * You should have received a copy of the GNU Library General Public
  25  * License along with mLib; if not, write to the Free Software
  26  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  27  */
  28
  29 /*----- Revision history --------------------------------------------------*
  30  *
  31  * $Log: alloc.c,v $
  32  * Revision 1.2  1999/05/05 18:50:31  mdw
  33  * Change licensing conditions to LGPL.
  34  *
  35  * Revision 1.1.1.1  1998/06/17 23:44:42  mdw
  36  * Initial version of mLib
  37  *
  38  */
  39
  40 /*----- Header files ------------------------------------------------------*/
  41
  42 /* --- ANSI headers --- */
  43
  44 #include <stdio.h>
  45 #include <stdlib.h>
  46 #include <string.h>
  47
  48 /* --- Local headers --- */
  49
  50 #include "alloc.h"
  51 #include "exc.h"
  52 #include "track.h"
  53
  54 /*----- Functions provided ------------------------------------------------*/
  55
  56 /* --- @xmalloc@ --- *
  57  *
  58  * Arguments:   @size_t sz@ = size of block to allocate
  59  *
  60  * Returns:     Pointer to allocated block.
  61  *
  62  * Use:         Allocates memory.  If there's not enough memory, the
  63  *              exception @EXC_NOMEM@ is thrown.
  64  */
  65
  66 void *xmalloc(size_t sz)
  67 {
  68   void *p = malloc(sz);
  69   if (!p)
  70     THROW(EXC_NOMEM);
  71   return (p);
  72 }
  73
  74 /* --- @xstrdup@ --- *
  75  *
  76  * Arguments:   @const char *s@ = pointer to a string
  77  *
  78  * Returns:     Pointer to a copy of the string.
  79  *
  80  * Use:         Copies a string (like @strdup@ would, if it existed).  If
  81  *              there's not enough memory, the exception @EXC_NOMEM@ is
  82  *              thrown.
  83  */
  84
  85 char *xstrdup(const char *s)
  86 {
  87   size_t sz = strlen(s) + 1;
  88   char *p = xmalloc(sz);
  89   memcpy(p, s, sz);
  90   return (p);
  91 }
  92
  93 /* --- @xrealloc@ --- *
  94  *
  95  * Arguments:   @void *p@ = pointer to a block of memory
  96  *              @size_t sz@ = new size desired for the block
  97  *
  98  * Returns:     Pointer to the resized memory block (which is almost
  99  *              certainly not in the same place any more).
 100  *
 101  * Use:         Resizes a memory block.  If there's not enough memory, the
 102  *              exception @EXC_NOMEM@ is thrown.
 103  */
 104
 105 void *xrealloc(void *p, size_t sz)
 106 {
 107   p = realloc(p, sz);
 108   if (!p)
 109     THROW(EXC_NOMEM);
 110   return (p);
 111 }
 112
 113 /*----- That's all, folks -------------------------------------------------*/