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#ifndef __OT_LAYOUT_H__
#define __OT_LAYOUT_H__
#include "otlconf.h"
OTL_BEGIN_HEADER
/************************************************************************/
/************************************************************************/
/***** *****/
/***** BASE DATA TYPES *****/
/***** *****/
/************************************************************************/
/************************************************************************/
typedef unsigned char OTL_Byte;
typedef const OTL_Byte* OTL_Bytes;
typedef int OTL_Error;
typedef void* OTL_Pointer;
typedef int OTL_Int;
typedef unsigned int OTL_UInt;
typedef long OTL_Long;
typedef unsigned long OTL_ULong;
typedef short OTL_Int16;
typedef unsigned short OTL_UInt16;
#if OTL_SIZEOF_INT == 4
typedef int OTL_Int32;
typedef unsigned int OTL_UInt32;
#elif OTL_SIZEOF_LONG == 4
typedef long OTL_Int32;
typedef unsigned long OTL_UInt32;
#else
# error "no 32-bits type found"
#endif
typedef OTL_UInt32 OTL_Tag;
/************************************************************************/
/************************************************************************/
/***** *****/
/***** ERROR CODES *****/
/***** *****/
/************************************************************************/
/************************************************************************/
typedef enum
{
OTL_Err_Ok = 0,
OTL_Err_InvalidArgument,
OTL_Err_InvalidFormat,
OTL_Err_InvalidOffset,
OTL_Err_Max
} OTL_Error;
/************************************************************************/
/************************************************************************/
/***** *****/
/***** MEMORY MANAGEMENT *****/
/***** *****/
/************************************************************************/
/************************************************************************/
typedef OTL_Pointer (*OTL_AllocFunc)( OTL_ULong size,
OTL_Pointer data );
typedef OTL_Pointer (*OTL_ReallocFunc)( OTL_Pointer block,
OTL_ULong size,
OTL_Pointer data );
typedef void (*OTL_FreeFunc)( OTL_Pointer block,
OTL_Pointer data );
typedef struct OTL_MemoryRec_
{
OTL_Pointer mem_data;
OTL_AllocFunc mem_alloc;
OTL_ReallocFunc mem_realloc;
OTL_FreeFunc mem_free;
} OTL_MemoryRec, *OTL_Memory;
/************************************************************************/
/************************************************************************/
/***** *****/
/***** ENUMERATIONS *****/
/***** *****/
/************************************************************************/
/************************************************************************/
/* re-define OTL_MAKE_TAG to something different if you're not */
/* using an ASCII-based character set (Vaxes anyone ?) */
#ifndef OTL_MAKE_TAG
#define OTL_MAKE_TAG(c1,c2,c3,c4) \
( ( (OTL_UInt32)(c1) << 24 ) | \
(OTL_UInt32)(c2) << 16 ) | \
(OTL_UInt32)(c3) << 8 ) | \
(OTL_UInt32)(c4) )
#endif
typedef enum OTL_ScriptTag_
{
OTL_SCRIPT_NONE = 0,
#define OTL_SCRIPT_TAG(c1,c2,c3,c4,s,n) OTL_SCRIPT_TAG_ ## n = OTL_MAKE_TAG(c1,c2,c3,c4),
#include "otltags.h"
OTL_SCRIPT_MAX
} OTL_ScriptTag;
typedef enum OTL_LangTag_
{
OTL_LANG_DEFAULT = 0,
#define OTL_LANG_TAG(c1,c2,c3,c4,s,n) OTL_LANG_TAG_ ## n = OTL_MAKE_TAG(c1,c2,c3,c4),
#include "otltags.h"
OTL_LANG_MAX
} OTL_LangTag;
/************************************************************************/
/************************************************************************/
/***** *****/
/***** MEMORY READS *****/
/***** *****/
/************************************************************************/
/************************************************************************/
#define OTL_PEEK_USHORT(p) ( ((OTL_UInt)((p)[0]) << 8) | \
((OTL_UInt)((p)[1]) ) )
#define OTL_PEEK_ULONG(p) ( ((OTL_UInt32)((p)[0]) << 24) | \
((OTL_UInt32)((p)[1]) << 16) | \
((OTL_UInt32)((p)[2]) << 8) | \
((OTL_UInt32)((p)[3]) ) )
#define OTL_PEEK_SHORT(p) ((OTL_Int16)OTL_PEEK_USHORT(p))
#define OTL_PEEK_LONG(p) ((OTL_Int32)OTL_PEEK_ULONG(p))
#define OTL_NEXT_USHORT(p) ( (p) += 2, OTL_PEEK_USHORT((p)-2) )
#define OTL_NEXT_ULONG(p) ( (p) += 4, OTL_PEEK_ULONG((p)-4) )
#define OTL_NEXT_SHORT(p) ((OTL_Int16)OTL_NEXT_USHORT(p))
#define OTL_NEXT_LONG(p) ((OTL_Int32)OTL_NEXT_ULONG(p))
/************************************************************************/
/************************************************************************/
/***** *****/
/***** VALIDATION *****/
/***** *****/
/************************************************************************/
/************************************************************************/
typedef struct OTL_ValidatorRec_* OTL_Validator;
typedef struct OTL_ValidatorRec_
{
OTL_Bytes limit;
OTL_Bytes base;
OTL_Error error;
OTL_jmp_buf jump_buffer;
} OTL_ValidatorRec;
typedef void (*OTL_ValidateFunc)( OTL_Bytes table,
OTL_Valid valid );
OTL_API( void )
otl_validator_error( OTL_Validator validator,
OTL_Error error );
#define OTL_INVALID(e) otl_validator_error( valid, e )
#define OTL_INVALID_TOO_SHORT OTL_INVALID( OTL_Err_InvalidOffset )
#define OTL_INVALID_DATA OTL_INVALID( OTL_Err_InvalidFormat )
#define OTL_CHECK(_count) OTL_BEGIN_STMNT \
if ( p + (_count) > valid->limit ) \
OTL_INVALID_TOO_SHORT; \
OTL_END_STMNT
/* */
OTL_END_HEADER
#endif /* __OPENTYPE_LAYOUT_H__ */
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