third_party/harfbuzz/src/harfbuzz-impl.c

   1 /*
   2  * Copyright (C) 1998-2004  David Turner and Werner Lemberg
   3  * Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies)
   4  * Copyright (C) 2007  Red Hat, Inc.
   5  *
   6  * This is part of HarfBuzz, an OpenType Layout engine library.
   7  *
   8  * Permission is hereby granted, without written agreement and without
   9  * license or royalty fees, to use, copy, modify, and distribute this
  10  * software and its documentation for any purpose, provided that the
  11  * above copyright notice and the following two paragraphs appear in
  12  * all copies of this software.
  13  *
  14  * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
  15  * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
  16  * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
  17  * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
  18  * DAMAGE.
  19  *
  20  * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
  21  * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
  22  * FITNESS FOR A PARTICULAR PURPOSE.  THE SOFTWARE PROVIDED HEREUNDER IS
  23  * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
  24  * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
  25  *
  26  * Red Hat Author(s): Behdad Esfahbod
  27  */
  28
  29 #include "harfbuzz-impl.h"
  30
  31
  32 HB_INTERNAL HB_Pointer
  33 _hb_alloc(size_t     size,
  34           HB_Error  *perror )
  35 {
  36   HB_Error    error = (HB_Error)0;
  37   HB_Pointer  block = NULL;
  38
  39   if ( size > 0 )
  40   {
  41     block = calloc( 1, size );
  42     if ( !block )
  43       error = ERR(HB_Err_Out_Of_Memory);
  44   }
  45
  46   *perror = error;
  47   return block;
  48 }
  49
  50
  51 HB_INTERNAL HB_Pointer
  52 _hb_realloc(HB_Pointer  block,
  53             size_t      new_size,
  54             HB_Error   *perror )
  55 {
  56     HB_Pointer  block2 = NULL;
  57     HB_Error    error  = (HB_Error)0;
  58
  59     block2 = realloc( block, new_size );
  60     if ( block2 == NULL && new_size != 0 )
  61         error = ERR(HB_Err_Out_Of_Memory);
  62
  63     if ( !error )
  64         block = block2;
  65
  66     *perror = error;
  67     return block;
  68 }
  69
  70
  71 HB_INTERNAL void
  72 _hb_free( HB_Pointer  block )
  73 {
  74   if ( block )
  75     free( block );
  76 }
  77
  78
  79 /* helper func to set a breakpoint on */
  80 HB_INTERNAL HB_Error
  81 _hb_err (HB_Error code)
  82 {
  83   return code;
  84 }