443 lines
19 KiB
C
443 lines
19 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 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 valid );
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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_( _prefix, _error ) \
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ft_validator_error( valid->root, _prefix ## _error )
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#define OTV_OPTIONAL_TABLE( _table ) FT_UInt _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) > valid->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 ( valid->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'!\n" \
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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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#ifdef FT_DEBUG_LEVEL_TRACE
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/* use preprocessor's argument prescan to expand one argument into two */
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#define OTV_NEST1( x ) OTV_NEST1_( x )
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#define OTV_NEST1_( func0, name0 ) \
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FT_BEGIN_STMNT \
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valid->nesting_level = 0; \
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valid->func[0] = func0; \
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valid->debug_function_name[0] = name0; \
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FT_END_STMNT
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/* use preprocessor's argument prescan to expand two arguments into four */
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#define OTV_NEST2( x, y ) OTV_NEST2_( x, y )
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#define OTV_NEST2_( func0, name0, func1, name1 ) \
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FT_BEGIN_STMNT \
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valid->nesting_level = 0; \
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valid->func[0] = func0; \
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valid->func[1] = func1; \
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valid->debug_function_name[0] = name0; \
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valid->debug_function_name[1] = name1; \
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FT_END_STMNT
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/* use preprocessor's argument prescan to expand three arguments into six */
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#define OTV_NEST3( x, y, z ) OTV_NEST3_( x, y, z )
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#define OTV_NEST3_( func0, name0, func1, name1, func2, name2 ) \
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FT_BEGIN_STMNT \
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valid->nesting_level = 0; \
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valid->func[0] = func0; \
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valid->func[1] = func1; \
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valid->func[2] = func2; \
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valid->debug_function_name[0] = name0; \
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valid->debug_function_name[1] = name1; \
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valid->debug_function_name[2] = name2; \
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FT_END_STMNT
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#define OTV_INIT valid->debug_indent = 0
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#define OTV_ENTER \
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FT_BEGIN_STMNT \
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valid->debug_indent += 2; \
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FT_TRACE4(( "%*.s", valid->debug_indent, 0 )); \
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FT_TRACE4(( "%s table\n", \
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valid->debug_function_name[valid->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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valid->debug_indent += 2; \
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FT_TRACE4(( "%*.s", valid->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 valid->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", valid->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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/* use preprocessor's argument prescan to expand one argument into two */
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#define OTV_NEST1( x ) OTV_NEST1_( x )
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#define OTV_NEST1_( func0, name0 ) \
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FT_BEGIN_STMNT \
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valid->nesting_level = 0; \
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valid->func[0] = func0; \
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FT_END_STMNT
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/* use preprocessor's argument prescan to expand two arguments into four */
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#define OTV_NEST2( x, y ) OTV_NEST2_( x, y )
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#define OTV_NEST2_( func0, name0, func1, name1 ) \
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FT_BEGIN_STMNT \
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valid->nesting_level = 0; \
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valid->func[0] = func0; \
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valid->func[1] = func1; \
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FT_END_STMNT
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/* use preprocessor's argument prescan to expand three arguments into six */
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#define OTV_NEST3( x, y, z ) OTV_NEST3_( x, y, z )
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#define OTV_NEST3_( func0, name0, func1, name1, func2, name2 ) \
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FT_BEGIN_STMNT \
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valid->nesting_level = 0; \
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valid->func[0] = func0; \
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valid->func[1] = func1; \
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valid->func[2] = func2; \
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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 valid->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 valid );
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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 valid );
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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 valid );
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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 valid );
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FT_LOCAL( void )
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otv_LookupList_validate( FT_Bytes table,
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OTV_Validator valid );
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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 valid );
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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 valid );
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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 valid );
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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 valid );
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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 valid );
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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 ChainPosClassSet otv_x_Ox, "ChainPosClassSet"
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#define ChainPosRuleSet otv_x_Ox, "ChainPosRuleSet"
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#define ChainSubClassSet otv_x_Ox, "ChainSubClassSet"
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#define ChainSubRuleSet otv_x_Ox, "ChainSubRuleSet"
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#define JstfLangSys otv_x_Ox, "JstfLangSys"
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#define JstfMax otv_x_Ox, "JstfMax"
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#define LigGlyph otv_x_Ox, "LigGlyph"
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#define LigatureArray otv_x_Ox, "LigatureArray"
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#define LigatureSet otv_x_Ox, "LigatureSet"
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#define PosClassSet otv_x_Ox, "PosClassSet"
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#define PosRuleSet otv_x_Ox, "PosRuleSet"
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#define SubClassSet otv_x_Ox, "SubClassSet"
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#define SubRuleSet otv_x_Ox, "SubRuleSet"
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FT_LOCAL( void )
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otv_x_Ox ( FT_Bytes table,
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OTV_Validator valid );
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#define AlternateSubstFormat1 otv_u_C_x_Ox, "AlternateSubstFormat1"
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#define ChainContextPosFormat1 otv_u_C_x_Ox, "ChainContextPosFormat1"
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#define ChainContextSubstFormat1 otv_u_C_x_Ox, "ChainContextSubstFormat1"
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#define ContextPosFormat1 otv_u_C_x_Ox, "ContextPosFormat1"
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#define ContextSubstFormat1 otv_u_C_x_Ox, "ContextSubstFormat1"
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#define LigatureSubstFormat1 otv_u_C_x_Ox, "LigatureSubstFormat1"
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#define MultipleSubstFormat1 otv_u_C_x_Ox, "MultipleSubstFormat1"
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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 valid );
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#define AlternateSet otv_x_ux, "AlternateSet"
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#define AttachPoint otv_x_ux, "AttachPoint"
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#define ExtenderGlyph otv_x_ux, "ExtenderGlyph"
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#define JstfGPOSModList otv_x_ux, "JstfGPOSModList"
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#define JstfGSUBModList otv_x_ux, "JstfGSUBModList"
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#define Sequence otv_x_ux, "Sequence"
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FT_LOCAL( void )
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otv_x_ux( FT_Bytes table,
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OTV_Validator valid );
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#define PosClassRule otv_x_y_ux_sy, "PosClassRule"
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#define PosRule otv_x_y_ux_sy, "PosRule"
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#define SubClassRule otv_x_y_ux_sy, "SubClassRule"
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#define SubRule otv_x_y_ux_sy, "SubRule"
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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 valid );
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#define ChainPosClassRule otv_x_ux_y_uy_z_uz_p_sp, "ChainPosClassRule"
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#define ChainPosRule otv_x_ux_y_uy_z_uz_p_sp, "ChainPosRule"
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#define ChainSubClassRule otv_x_ux_y_uy_z_uz_p_sp, "ChainSubClassRule"
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#define ChainSubRule otv_x_ux_y_uy_z_uz_p_sp, "ChainSubRule"
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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 valid );
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#define ContextPosFormat2 otv_u_O_O_x_Onx, "ContextPosFormat2"
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#define ContextSubstFormat2 otv_u_O_O_x_Onx, "ContextSubstFormat2"
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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 valid );
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#define ContextPosFormat3 otv_u_x_y_Ox_sy, "ContextPosFormat3"
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#define ContextSubstFormat3 otv_u_x_y_Ox_sy, "ContextSubstFormat3"
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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 valid );
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#define ChainContextPosFormat2 otv_u_O_O_O_O_x_Onx, "ChainContextPosFormat2"
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#define ChainContextSubstFormat2 otv_u_O_O_O_O_x_Onx, "ChainContextSubstFormat2"
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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 valid );
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#define ChainContextPosFormat3 otv_u_x_Ox_y_Oy_z_Oz_p_sp, "ChainContextPosFormat3"
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#define ChainContextSubstFormat3 otv_u_x_Ox_y_Oy_z_Oz_p_sp, "ChainContextSubstFormat3"
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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 valid );
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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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