438 lines
18 KiB
C
438 lines
18 KiB
C
/***************************************************************************/
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/* */
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/* otvcommn.h */
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/* */
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/* OpenType common tables validation (specification). */
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/* */
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/* Copyright 2004-2016 by */
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/* David Turner, Robert Wilhelm, and Werner Lemberg. */
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/* */
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/* This file is part of the FreeType project, and may only be used, */
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/* modified, and distributed under the terms of the FreeType project */
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/* license, LICENSE.TXT. By continuing to use, modify, or distribute */
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/* this file you indicate that you have read the license and */
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/* understand and accept it fully. */
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/* */
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/***************************************************************************/
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#ifndef OTVCOMMN_H_
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#define OTVCOMMN_H_
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#include <ft2build.h>
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#include "otvalid.h"
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#include FT_INTERNAL_DEBUG_H
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FT_BEGIN_HEADER
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/*************************************************************************/
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/*************************************************************************/
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/***** *****/
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/***** VALIDATION *****/
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/***** *****/
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/*************************************************************************/
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/*************************************************************************/
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typedef struct OTV_ValidatorRec_* OTV_Validator;
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typedef void (*OTV_Validate_Func)( FT_Bytes table,
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OTV_Validator otvalid );
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typedef struct OTV_ValidatorRec_
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{
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FT_Validator root;
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FT_UInt type_count;
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OTV_Validate_Func* type_funcs;
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FT_UInt lookup_count;
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FT_UInt glyph_count;
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FT_UInt nesting_level;
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OTV_Validate_Func func[3];
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FT_UInt extra1; /* for passing parameters */
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FT_UInt extra2;
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FT_Bytes extra3;
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#ifdef FT_DEBUG_LEVEL_TRACE
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FT_UInt debug_indent;
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const FT_String* debug_function_name[3];
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#endif
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} OTV_ValidatorRec;
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#undef FT_INVALID_
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#define FT_INVALID_( _error ) \
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ft_validator_error( otvalid->root, FT_THROW( _error ) )
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#define OTV_OPTIONAL_TABLE( _table ) FT_UShort _table; \
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FT_Bytes _table ## _p
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#define OTV_OPTIONAL_OFFSET( _offset ) \
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FT_BEGIN_STMNT \
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_offset ## _p = p; \
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_offset = FT_NEXT_USHORT( p ); \
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FT_END_STMNT
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#define OTV_LIMIT_CHECK( _count ) \
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FT_BEGIN_STMNT \
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if ( p + (_count) > otvalid->root->limit ) \
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FT_INVALID_TOO_SHORT; \
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FT_END_STMNT
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#define OTV_SIZE_CHECK( _size ) \
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FT_BEGIN_STMNT \
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if ( _size > 0 && _size < table_size ) \
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{ \
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if ( otvalid->root->level == FT_VALIDATE_PARANOID ) \
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FT_INVALID_OFFSET; \
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else \
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{ \
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/* strip off `const' */ \
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FT_Byte* pp = (FT_Byte*)_size ## _p; \
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\
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\
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FT_TRACE3(( "\n" \
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"Invalid offset to optional table `%s'" \
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" set to zero.\n" \
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"\n", #_size )); \
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\
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/* always assume 16bit entities */ \
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_size = pp[0] = pp[1] = 0; \
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} \
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} \
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FT_END_STMNT
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#define OTV_NAME_(x) #x
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#define OTV_NAME(x) OTV_NAME_(x)
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#define OTV_FUNC_(x) x##Func
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#define OTV_FUNC(x) OTV_FUNC_(x)
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#ifdef FT_DEBUG_LEVEL_TRACE
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#define OTV_NEST1( x ) \
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FT_BEGIN_STMNT \
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otvalid->nesting_level = 0; \
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otvalid->func[0] = OTV_FUNC( x ); \
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otvalid->debug_function_name[0] = OTV_NAME( x ); \
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FT_END_STMNT
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#define OTV_NEST2( x, y ) \
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FT_BEGIN_STMNT \
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otvalid->nesting_level = 0; \
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otvalid->func[0] = OTV_FUNC( x ); \
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otvalid->func[1] = OTV_FUNC( y ); \
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otvalid->debug_function_name[0] = OTV_NAME( x ); \
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otvalid->debug_function_name[1] = OTV_NAME( y ); \
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FT_END_STMNT
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#define OTV_NEST3( x, y, z ) \
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FT_BEGIN_STMNT \
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otvalid->nesting_level = 0; \
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otvalid->func[0] = OTV_FUNC( x ); \
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otvalid->func[1] = OTV_FUNC( y ); \
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otvalid->func[2] = OTV_FUNC( z ); \
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otvalid->debug_function_name[0] = OTV_NAME( x ); \
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otvalid->debug_function_name[1] = OTV_NAME( y ); \
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otvalid->debug_function_name[2] = OTV_NAME( z ); \
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FT_END_STMNT
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#define OTV_INIT otvalid->debug_indent = 0
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#define OTV_ENTER \
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FT_BEGIN_STMNT \
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otvalid->debug_indent += 2; \
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FT_TRACE4(( "%*.s", otvalid->debug_indent, 0 )); \
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FT_TRACE4(( "%s table\n", \
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otvalid->debug_function_name[otvalid->nesting_level] )); \
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FT_END_STMNT
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#define OTV_NAME_ENTER( name ) \
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FT_BEGIN_STMNT \
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otvalid->debug_indent += 2; \
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FT_TRACE4(( "%*.s", otvalid->debug_indent, 0 )); \
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FT_TRACE4(( "%s table\n", name )); \
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FT_END_STMNT
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#define OTV_EXIT otvalid->debug_indent -= 2
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#define OTV_TRACE( s ) \
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FT_BEGIN_STMNT \
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FT_TRACE4(( "%*.s", otvalid->debug_indent, 0 )); \
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FT_TRACE4( s ); \
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FT_END_STMNT
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#else /* !FT_DEBUG_LEVEL_TRACE */
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#define OTV_NEST1( x ) \
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FT_BEGIN_STMNT \
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otvalid->nesting_level = 0; \
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otvalid->func[0] = OTV_FUNC( x ); \
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FT_END_STMNT
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#define OTV_NEST2( x, y ) \
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FT_BEGIN_STMNT \
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otvalid->nesting_level = 0; \
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otvalid->func[0] = OTV_FUNC( x ); \
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otvalid->func[1] = OTV_FUNC( y ); \
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FT_END_STMNT
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#define OTV_NEST3( x, y, z ) \
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FT_BEGIN_STMNT \
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otvalid->nesting_level = 0; \
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otvalid->func[0] = OTV_FUNC( x ); \
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otvalid->func[1] = OTV_FUNC( y ); \
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otvalid->func[2] = OTV_FUNC( z ); \
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FT_END_STMNT
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#define OTV_INIT do { } while ( 0 )
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#define OTV_ENTER do { } while ( 0 )
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#define OTV_NAME_ENTER( name ) do { } while ( 0 )
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#define OTV_EXIT do { } while ( 0 )
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#define OTV_TRACE( s ) do { } while ( 0 )
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#endif /* !FT_DEBUG_LEVEL_TRACE */
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#define OTV_RUN otvalid->func[0]
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/*************************************************************************/
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/*************************************************************************/
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/***** *****/
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/***** COVERAGE TABLE *****/
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/***** *****/
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/*************************************************************************/
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/*************************************************************************/
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FT_LOCAL( void )
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otv_Coverage_validate( FT_Bytes table,
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OTV_Validator otvalid,
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FT_Int expected_count );
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/* return first covered glyph */
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FT_LOCAL( FT_UInt )
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otv_Coverage_get_first( FT_Bytes table );
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/* return last covered glyph */
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FT_LOCAL( FT_UInt )
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otv_Coverage_get_last( FT_Bytes table );
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/* return number of covered glyphs */
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FT_LOCAL( FT_UInt )
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otv_Coverage_get_count( FT_Bytes table );
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/*************************************************************************/
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/*************************************************************************/
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/***** *****/
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/***** CLASS DEFINITION TABLE *****/
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/***** *****/
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/*************************************************************************/
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/*************************************************************************/
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FT_LOCAL( void )
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otv_ClassDef_validate( FT_Bytes table,
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OTV_Validator otvalid );
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/*************************************************************************/
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/*************************************************************************/
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/***** *****/
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/***** DEVICE TABLE *****/
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/***** *****/
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/*************************************************************************/
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/*************************************************************************/
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FT_LOCAL( void )
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otv_Device_validate( FT_Bytes table,
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OTV_Validator otvalid );
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/*************************************************************************/
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/*************************************************************************/
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/***** *****/
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/***** LOOKUPS *****/
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/***** *****/
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/*************************************************************************/
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/*************************************************************************/
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FT_LOCAL( void )
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otv_Lookup_validate( FT_Bytes table,
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OTV_Validator otvalid );
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FT_LOCAL( void )
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otv_LookupList_validate( FT_Bytes table,
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OTV_Validator otvalid );
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/*************************************************************************/
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/*************************************************************************/
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/***** *****/
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/***** FEATURES *****/
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/***** *****/
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/*************************************************************************/
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/*************************************************************************/
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FT_LOCAL( void )
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otv_Feature_validate( FT_Bytes table,
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OTV_Validator otvalid );
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/* lookups must already be validated */
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FT_LOCAL( void )
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otv_FeatureList_validate( FT_Bytes table,
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FT_Bytes lookups,
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OTV_Validator otvalid );
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/*************************************************************************/
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/*************************************************************************/
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/***** *****/
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/***** LANGUAGE SYSTEM *****/
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/***** *****/
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/*************************************************************************/
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/*************************************************************************/
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FT_LOCAL( void )
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otv_LangSys_validate( FT_Bytes table,
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OTV_Validator otvalid );
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/*************************************************************************/
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/*************************************************************************/
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/***** *****/
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/***** SCRIPTS *****/
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/***** *****/
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/*************************************************************************/
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/*************************************************************************/
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FT_LOCAL( void )
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otv_Script_validate( FT_Bytes table,
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OTV_Validator otvalid );
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/* features must already be validated */
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FT_LOCAL( void )
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otv_ScriptList_validate( FT_Bytes table,
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FT_Bytes features,
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OTV_Validator otvalid );
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/*************************************************************************/
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/*************************************************************************/
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/***** *****/
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/***** UTILITY FUNCTIONS *****/
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/***** *****/
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/*************************************************************************/
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/*************************************************************************/
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#define ChainPosClassSetFunc otv_x_Ox
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#define ChainPosRuleSetFunc otv_x_Ox
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#define ChainSubClassSetFunc otv_x_Ox
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#define ChainSubRuleSetFunc otv_x_Ox
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#define JstfLangSysFunc otv_x_Ox
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#define JstfMaxFunc otv_x_Ox
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#define LigGlyphFunc otv_x_Ox
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#define LigatureArrayFunc otv_x_Ox
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#define LigatureSetFunc otv_x_Ox
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#define PosClassSetFunc otv_x_Ox
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#define PosRuleSetFunc otv_x_Ox
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#define SubClassSetFunc otv_x_Ox
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#define SubRuleSetFunc otv_x_Ox
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FT_LOCAL( void )
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otv_x_Ox ( FT_Bytes table,
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OTV_Validator otvalid );
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#define AlternateSubstFormat1Func otv_u_C_x_Ox
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#define ChainContextPosFormat1Func otv_u_C_x_Ox
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#define ChainContextSubstFormat1Func otv_u_C_x_Ox
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#define ContextPosFormat1Func otv_u_C_x_Ox
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#define ContextSubstFormat1Func otv_u_C_x_Ox
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#define LigatureSubstFormat1Func otv_u_C_x_Ox
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#define MultipleSubstFormat1Func otv_u_C_x_Ox
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FT_LOCAL( void )
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otv_u_C_x_Ox( FT_Bytes table,
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OTV_Validator otvalid );
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#define AlternateSetFunc otv_x_ux
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#define AttachPointFunc otv_x_ux
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#define ExtenderGlyphFunc otv_x_ux
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#define JstfGPOSModListFunc otv_x_ux
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#define JstfGSUBModListFunc otv_x_ux
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#define SequenceFunc otv_x_ux
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FT_LOCAL( void )
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otv_x_ux( FT_Bytes table,
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OTV_Validator otvalid );
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#define PosClassRuleFunc otv_x_y_ux_sy
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#define PosRuleFunc otv_x_y_ux_sy
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#define SubClassRuleFunc otv_x_y_ux_sy
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#define SubRuleFunc otv_x_y_ux_sy
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FT_LOCAL( void )
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otv_x_y_ux_sy( FT_Bytes table,
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OTV_Validator otvalid );
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#define ChainPosClassRuleFunc otv_x_ux_y_uy_z_uz_p_sp
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#define ChainPosRuleFunc otv_x_ux_y_uy_z_uz_p_sp
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#define ChainSubClassRuleFunc otv_x_ux_y_uy_z_uz_p_sp
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#define ChainSubRuleFunc otv_x_ux_y_uy_z_uz_p_sp
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FT_LOCAL( void )
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otv_x_ux_y_uy_z_uz_p_sp( FT_Bytes table,
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OTV_Validator otvalid );
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#define ContextPosFormat2Func otv_u_O_O_x_Onx
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#define ContextSubstFormat2Func otv_u_O_O_x_Onx
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FT_LOCAL( void )
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otv_u_O_O_x_Onx( FT_Bytes table,
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OTV_Validator otvalid );
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#define ContextPosFormat3Func otv_u_x_y_Ox_sy
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#define ContextSubstFormat3Func otv_u_x_y_Ox_sy
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FT_LOCAL( void )
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otv_u_x_y_Ox_sy( FT_Bytes table,
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OTV_Validator otvalid );
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#define ChainContextPosFormat2Func otv_u_O_O_O_O_x_Onx
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#define ChainContextSubstFormat2Func otv_u_O_O_O_O_x_Onx
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FT_LOCAL( void )
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otv_u_O_O_O_O_x_Onx( FT_Bytes table,
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OTV_Validator otvalid );
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#define ChainContextPosFormat3Func otv_u_x_Ox_y_Oy_z_Oz_p_sp
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#define ChainContextSubstFormat3Func otv_u_x_Ox_y_Oy_z_Oz_p_sp
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FT_LOCAL( void )
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otv_u_x_Ox_y_Oy_z_Oz_p_sp( FT_Bytes table,
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OTV_Validator otvalid );
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FT_LOCAL( FT_UInt )
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otv_GSUBGPOS_get_Lookup_count( FT_Bytes table );
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FT_LOCAL( FT_UInt )
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otv_GSUBGPOS_have_MarkAttachmentType_flag( FT_Bytes table );
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/* */
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FT_END_HEADER
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#endif /* OTVCOMMN_H_ */
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/* END */
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