1/****************************************************************************
2 *
3 * gxvmorx0.c
4 *
5 * TrueTypeGX/AAT morx table validation
6 * body for type0 (Indic Script Rearrangement) subtable.
7 *
8 * Copyright (C) 2005-2023 by
9 * suzuki toshiya, Masatake YAMATO, Red Hat K.K.,
10 * David Turner, Robert Wilhelm, and Werner Lemberg.
11 *
12 * This file is part of the FreeType project, and may only be used,
13 * modified, and distributed under the terms of the FreeType project
14 * license, LICENSE.TXT. By continuing to use, modify, or distribute
15 * this file you indicate that you have read the license and
16 * understand and accept it fully.
17 *
18 */
19
20/****************************************************************************
21 *
22 * gxvalid is derived from both gxlayout module and otvalid module.
23 * Development of gxlayout is supported by the Information-technology
24 * Promotion Agency(IPA), Japan.
25 *
26 */
27
28
29#include "gxvmorx.h"
30
31
32 /**************************************************************************
33 *
34 * The macro FT_COMPONENT is used in trace mode. It is an implicit
35 * parameter of the FT_TRACE() and FT_ERROR() macros, used to print/log
36 * messages during execution.
37 */
38#undef FT_COMPONENT
39#define FT_COMPONENT gxvmorx
40
41
42 static void
43 gxv_morx_subtable_type0_entry_validate(
44 FT_UShort state,
45 FT_UShort flags,
46 GXV_XStateTable_GlyphOffsetCPtr glyphOffset_p,
47 FT_Bytes table,
48 FT_Bytes limit,
49 GXV_Validator gxvalid )
50 {
51#ifdef GXV_LOAD_UNUSED_VARS
52 FT_UShort markFirst;
53 FT_UShort dontAdvance;
54 FT_UShort markLast;
55#endif
56 FT_UShort reserved;
57#ifdef GXV_LOAD_UNUSED_VARS
58 FT_UShort verb;
59#endif
60
61 FT_UNUSED( state );
62 FT_UNUSED( glyphOffset_p );
63 FT_UNUSED( table );
64 FT_UNUSED( limit );
65
66
67#ifdef GXV_LOAD_UNUSED_VARS
68 markFirst = (FT_UShort)( ( flags >> 15 ) & 1 );
69 dontAdvance = (FT_UShort)( ( flags >> 14 ) & 1 );
70 markLast = (FT_UShort)( ( flags >> 13 ) & 1 );
71#endif
72
73 reserved = (FT_UShort)( flags & 0x1FF0 );
74#ifdef GXV_LOAD_UNUSED_VARS
75 verb = (FT_UShort)( flags & 0x000F );
76#endif
77
78 if ( 0 < reserved )
79 {
80 GXV_TRACE(( " non-zero bits found in reserved range\n" ));
81 FT_INVALID_DATA;
82 }
83 }
84
85
86 FT_LOCAL_DEF( void )
87 gxv_morx_subtable_type0_validate( FT_Bytes table,
88 FT_Bytes limit,
89 GXV_Validator gxvalid )
90 {
91 FT_Bytes p = table;
92
93
94 GXV_NAME_ENTER(
95 "morx chain subtable type0 (Indic-Script Rearrangement)" );
96
97 GXV_LIMIT_CHECK( GXV_STATETABLE_HEADER_SIZE );
98
99 gxvalid->xstatetable.optdata = NULL;
100 gxvalid->xstatetable.optdata_load_func = NULL;
101 gxvalid->xstatetable.subtable_setup_func = NULL;
102 gxvalid->xstatetable.entry_glyphoffset_fmt = GXV_GLYPHOFFSET_NONE;
103 gxvalid->xstatetable.entry_validate_func =
104 gxv_morx_subtable_type0_entry_validate;
105
106 gxv_XStateTable_validate( p, limit, gxvalid );
107
108 GXV_EXIT;
109 }
110
111
112/* END */
113