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      1 /*
      2  * Copyright (C) 1998-2004  David Turner and Werner Lemberg
      3  * Copyright (C) 2006  Behdad Esfahbod
      4  *
      5  * This is part of HarfBuzz, an OpenType Layout engine library.
      6  *
      7  * Permission is hereby granted, without written agreement and without
      8  * license or royalty fees, to use, copy, modify, and distribute this
      9  * software and its documentation for any purpose, provided that the
     10  * above copyright notice and the following two paragraphs appear in
     11  * all copies of this software.
     12  *
     13  * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
     14  * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
     15  * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
     16  * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
     17  * DAMAGE.
     18  *
     19  * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
     20  * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
     21  * FITNESS FOR A PARTICULAR PURPOSE.  THE SOFTWARE PROVIDED HEREUNDER IS
     22  * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
     23  * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
     24  */
     25 
     26 #ifndef HARFBUZZ_IMPL_H
     27 #define HARFBUZZ_IMPL_H
     28 
     29 #include "harfbuzz-global.h"
     30 
     31 #include <stdlib.h>
     32 
     33 HB_BEGIN_HEADER
     34 
     35 #ifndef HB_INTERNAL
     36 # define HB_INTERNAL
     37 #endif
     38 
     39 #ifndef NULL
     40 # define NULL ((void *)0)
     41 #endif
     42 
     43 #ifndef FALSE
     44 # define FALSE 0
     45 #endif
     46 
     47 #ifndef TRUE
     48 # define TRUE 1
     49 #endif
     50 
     51 #ifndef TTAG_GDEF
     52 # define TTAG_GDEF  HB_MAKE_TAG( 'G', 'D', 'E', 'F' )
     53 #endif
     54 #ifndef TTAG_GPOS
     55 # define TTAG_GPOS  HB_MAKE_TAG( 'G', 'P', 'O', 'S' )
     56 #endif
     57 #ifndef TTAG_GSUB
     58 # define TTAG_GSUB  HB_MAKE_TAG( 'G', 'S', 'U', 'B' )
     59 #endif
     60 
     61 #ifndef HB_UNUSED
     62 # define HB_UNUSED(arg) ((arg) = (arg))
     63 #endif
     64 
     65 #define HB_LIKELY(cond) (cond)
     66 #define HB_UNLIKELY(cond) (cond)
     67 
     68 #define ARRAY_LEN(Array) ((int)(sizeof (Array) / sizeof (Array)[0]))
     69 
     70 
     71 
     72 #define HB_IsHighSurrogate(ucs) \
     73     (((ucs) & 0xfc00) == 0xd800)
     74 
     75 #define HB_IsLowSurrogate(ucs) \
     76     (((ucs) & 0xfc00) == 0xdc00)
     77 
     78 #define HB_SurrogateToUcs4(high, low) \
     79     (((HB_UChar32)(high))<<10) + (low) - 0x35fdc00;
     80 
     81 
     82 
     83 
     84 
     85 #define  ALLOC(_ptr,_size)   \
     86            ( (_ptr) = _hb_alloc( _size, &error ), error != 0 )
     87 
     88 #define  REALLOC(_ptr,_newsz)  \
     89            ( (_ptr) = _hb_realloc( (_ptr), (_newsz), &error ), error != 0 )
     90 
     91 #define  FREE(_ptr)                    \
     92   do {                                 \
     93     if ( (_ptr) )                      \
     94     {                                  \
     95       _hb_free( _ptr );     \
     96       _ptr = NULL;                     \
     97     }                                  \
     98   } while (0)
     99 
    100 #define  ALLOC_ARRAY(_ptr,_count,_type)   \
    101            ALLOC(_ptr,(_count)*sizeof(_type))
    102 
    103 #define  REALLOC_ARRAY(_ptr,_newcnt,_type) \
    104            REALLOC(_ptr,(_newcnt)*sizeof(_type))
    105 
    106 #define  MEM_Copy(dest,source,count)   memcpy( (char*)(dest), (const char*)(source), (size_t)(count) )
    107 
    108 #define ERR(err)   _hb_err (err)
    109 
    110 
    111 HB_INTERNAL HB_Pointer
    112 _hb_alloc( size_t    size,
    113 	   HB_Error *perror_ );
    114 
    115 HB_INTERNAL HB_Pointer
    116 _hb_realloc( HB_Pointer block,
    117 	     size_t     new_size,
    118 	     HB_Error  *perror_ );
    119 
    120 HB_INTERNAL void
    121 _hb_free( HB_Pointer block );
    122 
    123 
    124 /* helper func to set a breakpoint on */
    125 HB_INTERNAL HB_Error
    126 _hb_err (HB_Error code);
    127 
    128 
    129 HB_END_HEADER
    130 
    131 #endif /* HARFBUZZ_IMPL_H */
    132