| /**************************************************************************** |
| * |
| * internal/compiler-macros.h |
| * |
| * Compiler-specific macro definitions used internally by FreeType. |
| * |
| * Copyright (C) 2020 by |
| * David Turner, Robert Wilhelm, and Werner Lemberg. |
| * |
| * This file is part of the FreeType project, and may only be used, |
| * modified, and distributed under the terms of the FreeType project |
| * license, LICENSE.TXT. By continuing to use, modify, or distribute |
| * this file you indicate that you have read the license and |
| * understand and accept it fully. |
| * |
| */ |
| |
| #ifndef INTERNAL_COMPILER_MACROS_H_ |
| #define INTERNAL_COMPILER_MACROS_H_ |
| |
| #include <freetype/config/public-macros.h> |
| |
| FT_BEGIN_HEADER |
| |
| /* `FT_UNUSED` indicates that a given parameter is not used -- */ |
| /* this is only used to get rid of unpleasant compiler warnings. */ |
| #ifndef FT_UNUSED |
| #define FT_UNUSED( arg ) ( (arg) = (arg) ) |
| #endif |
| |
| |
| /* Fix compiler warning with sgi compiler. */ |
| #if defined( __sgi ) && !defined( __GNUC__ ) |
| #if defined( _COMPILER_VERSION ) && ( _COMPILER_VERSION >= 730 ) |
| #pragma set woff 3505 |
| #endif |
| #endif |
| |
| #ifdef _WIN64 |
| /* only 64bit Windows uses the LLP64 data model, i.e., */ |
| /* 32bit integers, 64bit pointers */ |
| #define FT_UINT_TO_POINTER( x ) (void*)(unsigned __int64)(x) |
| #else |
| #define FT_UINT_TO_POINTER( x ) (void*)(unsigned long)(x) |
| #endif |
| |
| |
| /************************************************************************** |
| * |
| * miscellaneous |
| * |
| */ |
| |
| |
| #define FT_BEGIN_STMNT do { |
| #define FT_END_STMNT } while ( 0 ) |
| #define FT_DUMMY_STMNT FT_BEGIN_STMNT FT_END_STMNT |
| |
| |
| /* `typeof` condition taken from gnulib's `intprops.h` header file */ |
| #if ( ( defined( __GNUC__ ) && __GNUC__ >= 2 ) || \ |
| ( defined( __IBMC__ ) && __IBMC__ >= 1210 && \ |
| defined( __IBM__TYPEOF__ ) ) || \ |
| ( defined( __SUNPRO_C ) && __SUNPRO_C >= 0x5110 && !__STDC__ ) ) |
| #define FT_TYPEOF( type ) ( __typeof__ ( type ) ) |
| #else |
| #define FT_TYPEOF( type ) /* empty */ |
| #endif |
| |
| |
| /* Use `FT_LOCAL` and `FT_LOCAL_DEF` to declare and define, */ |
| /* respectively, a function that gets used only within the scope of a */ |
| /* module. Normally, both the header and source code files for such a */ |
| /* function are within a single module directory. */ |
| /* */ |
| /* Intra-module arrays should be tagged with `FT_LOCAL_ARRAY` and */ |
| /* `FT_LOCAL_ARRAY_DEF`. */ |
| /* */ |
| #ifdef FT_MAKE_OPTION_SINGLE_OBJECT |
| |
| #define FT_LOCAL( x ) static x |
| #define FT_LOCAL_DEF( x ) static x |
| |
| #else |
| |
| #ifdef __cplusplus |
| #define FT_LOCAL( x ) extern "C" x |
| #define FT_LOCAL_DEF( x ) extern "C" x |
| #else |
| #define FT_LOCAL( x ) extern x |
| #define FT_LOCAL_DEF( x ) x |
| #endif |
| |
| #endif /* FT_MAKE_OPTION_SINGLE_OBJECT */ |
| |
| #define FT_LOCAL_ARRAY( x ) extern const x |
| #define FT_LOCAL_ARRAY_DEF( x ) const x |
| |
| |
| /* Use `FT_BASE` and `FT_BASE_DEF` to declare and define, respectively, */ |
| /* functions that are used in more than a single module. In the */ |
| /* current setup this implies that the declaration is in a header file */ |
| /* in the `include/freetype/internal` directory, and the function body */ |
| /* is in a file in `src/base`. */ |
| /* */ |
| #ifndef FT_BASE |
| |
| #ifdef __cplusplus |
| #define FT_BASE( x ) extern "C" x |
| #else |
| #define FT_BASE( x ) extern x |
| #endif |
| |
| #endif /* !FT_BASE */ |
| |
| |
| #ifndef FT_BASE_DEF |
| |
| #ifdef __cplusplus |
| #define FT_BASE_DEF( x ) x |
| #else |
| #define FT_BASE_DEF( x ) x |
| #endif |
| |
| #endif /* !FT_BASE_DEF */ |
| |
| |
| /* When compiling FreeType as a DLL or DSO with hidden visibility */ |
| /* some systems/compilers need a special attribute in front OR after */ |
| /* the return type of function declarations. */ |
| /* */ |
| /* Two macros are used within the FreeType source code to define */ |
| /* exported library functions: `FT_EXPORT` and `FT_EXPORT_DEF`. */ |
| /* */ |
| /* - `FT_EXPORT( return_type )` */ |
| /* */ |
| /* is used in a function declaration, as in */ |
| /* */ |
| /* ``` */ |
| /* FT_EXPORT( FT_Error ) */ |
| /* FT_Init_FreeType( FT_Library* alibrary ); */ |
| /* ``` */ |
| /* */ |
| /* - `FT_EXPORT_DEF( return_type )` */ |
| /* */ |
| /* is used in a function definition, as in */ |
| /* */ |
| /* ``` */ |
| /* FT_EXPORT_DEF( FT_Error ) */ |
| /* FT_Init_FreeType( FT_Library* alibrary ) */ |
| /* { */ |
| /* ... some code ... */ |
| /* return FT_Err_Ok; */ |
| /* } */ |
| /* ``` */ |
| /* */ |
| /* You can provide your own implementation of `FT_EXPORT` and */ |
| /* `FT_EXPORT_DEF` here if you want. */ |
| /* */ |
| /* To export a variable, use `FT_EXPORT_VAR`. */ |
| /* */ |
| |
| /* NOTE: See <freetype/config/public-macros.h> for FT_EXPORT() definition */ |
| |
| #ifndef FT_EXPORT_DEF |
| |
| #ifdef __cplusplus |
| #define FT_EXPORT_DEF( x ) extern "C" x |
| #else |
| #define FT_EXPORT_DEF( x ) extern x |
| #endif |
| |
| #endif /* !FT_EXPORT_DEF */ |
| |
| |
| #ifndef FT_EXPORT_VAR |
| |
| #ifdef __cplusplus |
| #define FT_EXPORT_VAR( x ) extern "C" x |
| #else |
| #define FT_EXPORT_VAR( x ) extern x |
| #endif |
| |
| #endif /* !FT_EXPORT_VAR */ |
| |
| |
| /* The following macros are needed to compile the library with a */ |
| /* C++ compiler and with 16bit compilers. */ |
| /* */ |
| |
| /* This is special. Within C++, you must specify `extern "C"` for */ |
| /* functions which are used via function pointers, and you also */ |
| /* must do that for structures which contain function pointers to */ |
| /* assure C linkage -- it's not possible to have (local) anonymous */ |
| /* functions which are accessed by (global) function pointers. */ |
| /* */ |
| /* */ |
| /* FT_CALLBACK_DEF is used to _define_ a callback function, */ |
| /* located in the same source code file as the structure that uses */ |
| /* it. */ |
| /* */ |
| /* FT_BASE_CALLBACK and FT_BASE_CALLBACK_DEF are used to declare */ |
| /* and define a callback function, respectively, in a similar way */ |
| /* as FT_BASE and FT_BASE_DEF work. */ |
| /* */ |
| /* FT_CALLBACK_TABLE is used to _declare_ a constant variable that */ |
| /* contains pointers to callback functions. */ |
| /* */ |
| /* FT_CALLBACK_TABLE_DEF is used to _define_ a constant variable */ |
| /* that contains pointers to callback functions. */ |
| /* */ |
| /* */ |
| /* Some 16bit compilers have to redefine these macros to insert */ |
| /* the infamous `_cdecl` or `__fastcall` declarations. */ |
| /* */ |
| #ifndef FT_CALLBACK_DEF |
| #ifdef __cplusplus |
| #define FT_CALLBACK_DEF( x ) extern "C" x |
| #else |
| #define FT_CALLBACK_DEF( x ) static x |
| #endif |
| #endif /* FT_CALLBACK_DEF */ |
| |
| #ifndef FT_BASE_CALLBACK |
| #ifdef __cplusplus |
| #define FT_BASE_CALLBACK( x ) extern "C" x |
| #define FT_BASE_CALLBACK_DEF( x ) extern "C" x |
| #else |
| #define FT_BASE_CALLBACK( x ) extern x |
| #define FT_BASE_CALLBACK_DEF( x ) x |
| #endif |
| #endif /* FT_BASE_CALLBACK */ |
| |
| #ifndef FT_CALLBACK_TABLE |
| #ifdef __cplusplus |
| #define FT_CALLBACK_TABLE extern "C" |
| #define FT_CALLBACK_TABLE_DEF extern "C" |
| #else |
| #define FT_CALLBACK_TABLE extern |
| #define FT_CALLBACK_TABLE_DEF /* nothing */ |
| #endif |
| #endif /* FT_CALLBACK_TABLE */ |
| |
| FT_END_HEADER |
| |
| #endif /* INTERNAL_COMPILER_MACROS_H_ */ |