204 lines
6.4 KiB
C
204 lines
6.4 KiB
C
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/****************************************************************************
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*
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* ftmoderr.h
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*
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* FreeType module error offsets (specification).
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*
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* Copyright (C) 2001-2020 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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/**************************************************************************
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*
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* This file is used to define the FreeType module error codes.
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*
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* If the macro `FT_CONFIG_OPTION_USE_MODULE_ERRORS` in `ftoption.h` is
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* set, the lower byte of an error value identifies the error code as
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* usual. In addition, the higher byte identifies the module. For
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* example, the error `FT_Err_Invalid_File_Format` has value 0x0003, the
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* error `TT_Err_Invalid_File_Format` has value 0x1303, the error
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* `T1_Err_Invalid_File_Format` has value 0x1403, etc.
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*
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* Note that `FT_Err_Ok`, `TT_Err_Ok`, etc. are always equal to zero,
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* including the high byte.
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*
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* If `FT_CONFIG_OPTION_USE_MODULE_ERRORS` isn't set, the higher byte of an
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* error value is set to zero.
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*
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* To hide the various `XXX_Err_` prefixes in the source code, FreeType
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* provides some macros in `fttypes.h`.
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*
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* FT_ERR( err )
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*
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* Add current error module prefix (as defined with the `FT_ERR_PREFIX`
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* macro) to `err`. For example, in the BDF module the line
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*
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* ```
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* error = FT_ERR( Invalid_Outline );
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* ```
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*
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* expands to
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*
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* ```
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* error = BDF_Err_Invalid_Outline;
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* ```
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*
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* For simplicity, you can always use `FT_Err_Ok` directly instead of
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* `FT_ERR( Ok )`.
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*
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* FT_ERR_EQ( errcode, err )
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* FT_ERR_NEQ( errcode, err )
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*
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* Compare error code `errcode` with the error `err` for equality and
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* inequality, respectively. Example:
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*
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* ```
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* if ( FT_ERR_EQ( error, Invalid_Outline ) )
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* ...
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* ```
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*
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* Using this macro you don't have to think about error prefixes. Of
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* course, if module errors are not active, the above example is the
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* same as
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*
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* ```
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* if ( error == FT_Err_Invalid_Outline )
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* ...
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* ```
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*
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* FT_ERROR_BASE( errcode )
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* FT_ERROR_MODULE( errcode )
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*
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* Get base error and module error code, respectively.
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*
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* It can also be used to create a module error message table easily with
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* something like
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*
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* ```
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* #undef FTMODERR_H_
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* #define FT_MODERRDEF( e, v, s ) { FT_Mod_Err_ ## e, s },
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* #define FT_MODERR_START_LIST {
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* #define FT_MODERR_END_LIST { 0, 0 } };
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*
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* const struct
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* {
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* int mod_err_offset;
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* const char* mod_err_msg
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* } ft_mod_errors[] =
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*
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* #include FT_MODULE_ERRORS_H
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* ```
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*
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*/
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#ifndef FTMODERR_H_
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#define FTMODERR_H_
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/*******************************************************************/
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/*******************************************************************/
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/***** *****/
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/***** SETUP MACROS *****/
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/***** *****/
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/*******************************************************************/
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/*******************************************************************/
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#undef FT_NEED_EXTERN_C
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#ifndef FT_MODERRDEF
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#ifdef FT_CONFIG_OPTION_USE_MODULE_ERRORS
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#define FT_MODERRDEF( e, v, s ) FT_Mod_Err_ ## e = v,
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#else
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#define FT_MODERRDEF( e, v, s ) FT_Mod_Err_ ## e = 0,
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#endif
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#define FT_MODERR_START_LIST enum {
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#define FT_MODERR_END_LIST FT_Mod_Err_Max };
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#ifdef __cplusplus
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#define FT_NEED_EXTERN_C
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extern "C" {
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#endif
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#endif /* !FT_MODERRDEF */
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/*******************************************************************/
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/*******************************************************************/
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/***** *****/
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/***** LIST MODULE ERROR BASES *****/
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/***** *****/
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/*******************************************************************/
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/*******************************************************************/
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#ifdef FT_MODERR_START_LIST
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FT_MODERR_START_LIST
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#endif
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FT_MODERRDEF( Base, 0x000, "base module" )
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FT_MODERRDEF( Autofit, 0x100, "autofitter module" )
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FT_MODERRDEF( BDF, 0x200, "BDF module" )
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FT_MODERRDEF( Bzip2, 0x300, "Bzip2 module" )
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FT_MODERRDEF( Cache, 0x400, "cache module" )
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FT_MODERRDEF( CFF, 0x500, "CFF module" )
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FT_MODERRDEF( CID, 0x600, "CID module" )
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FT_MODERRDEF( Gzip, 0x700, "Gzip module" )
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FT_MODERRDEF( LZW, 0x800, "LZW module" )
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FT_MODERRDEF( OTvalid, 0x900, "OpenType validation module" )
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FT_MODERRDEF( PCF, 0xA00, "PCF module" )
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FT_MODERRDEF( PFR, 0xB00, "PFR module" )
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FT_MODERRDEF( PSaux, 0xC00, "PS auxiliary module" )
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FT_MODERRDEF( PShinter, 0xD00, "PS hinter module" )
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FT_MODERRDEF( PSnames, 0xE00, "PS names module" )
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FT_MODERRDEF( Raster, 0xF00, "raster module" )
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FT_MODERRDEF( SFNT, 0x1000, "SFNT module" )
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FT_MODERRDEF( Smooth, 0x1100, "smooth raster module" )
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FT_MODERRDEF( TrueType, 0x1200, "TrueType module" )
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FT_MODERRDEF( Type1, 0x1300, "Type 1 module" )
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FT_MODERRDEF( Type42, 0x1400, "Type 42 module" )
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FT_MODERRDEF( Winfonts, 0x1500, "Windows FON/FNT module" )
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FT_MODERRDEF( GXvalid, 0x1600, "GX validation module" )
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#ifdef FT_MODERR_END_LIST
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FT_MODERR_END_LIST
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#endif
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/*******************************************************************/
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/*******************************************************************/
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/***** *****/
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/***** CLEANUP *****/
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/***** *****/
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/*******************************************************************/
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/*******************************************************************/
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#ifdef FT_NEED_EXTERN_C
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}
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#endif
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#undef FT_MODERR_START_LIST
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#undef FT_MODERR_END_LIST
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#undef FT_MODERRDEF
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#undef FT_NEED_EXTERN_C
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#endif /* FTMODERR_H_ */
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/* END */
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