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123 lines
3.8 KiB
C++
123 lines
3.8 KiB
C++
/* Included at the beginning of library source files, after all other #include lines.
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Sets up helpful macros and services used in my source code. They don't need
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module an annoying module prefix on their names since they are defined after
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all other #include lines. */
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#ifndef BLARGG_SOURCE_H
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#define BLARGG_SOURCE_H
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// If debugging is enabled, abort program if expr is false. Meant for checking
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// internal state and consistency. A failed assertion indicates a bug in the module.
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// void assert( bool expr );
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#include <assert.h>
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// If debugging is enabled and expr is false, abort program. Meant for checking
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// caller-supplied parameters and operations that are outside the control of the
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// module. A failed requirement indicates a bug outside the module.
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// void require( bool expr );
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#undef require
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#define require( expr ) assert( expr )
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// Use to provide hints to compiler for optimized code layout in situations where we
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// can almost always expect a conditional to go one way or the other. Should only be
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// used in situations where an unexpected branch is truly exceptional though!
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#undef likely
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#undef unlikely
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#ifdef __GNUC__
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#define likely( x ) __builtin_expect(x, 1)
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#define unlikely( x ) __builtin_expect(x, 0)
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#else
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#define likely( x ) (x)
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#define unlikely( x ) (x)
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#endif
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// Like printf() except output goes to debug log file. Might be defined to do
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// nothing (not even evaluate its arguments).
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// void debug_printf( const char* format, ... );
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static inline void blargg_dprintf_( const char*, ... ) { }
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#undef debug_printf
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#define debug_printf (1) ? (void) 0 : blargg_dprintf_
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// If enabled, evaluate expr and if false, make debug log entry with source file
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// and line. Meant for finding situations that should be examined further, but that
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// don't indicate a problem. In all cases, execution continues normally.
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#undef check
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#define check( expr ) ((void) 0)
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// If expr yields error string, return it from current function, otherwise continue.
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#undef RETURN_ERR
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#define RETURN_ERR( expr ) do { \
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blargg_err_t blargg_return_err_ = (expr); \
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if ( blargg_return_err_ ) return blargg_return_err_; \
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} while ( 0 )
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// If ptr is 0, return out of memory error string.
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#undef CHECK_ALLOC
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#define CHECK_ALLOC( ptr ) do { if ( (ptr) == 0 ) return "Out of memory"; } while ( 0 )
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// Avoid any macros which evaluate their arguments multiple times
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#undef min
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#undef max
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#define DEF_MIN_MAX( type ) \
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static inline type min( type x, type y ) { if ( x < y ) return x; return y; }\
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static inline type max( type x, type y ) { if ( y < x ) return x; return y; }
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DEF_MIN_MAX( int )
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DEF_MIN_MAX( unsigned )
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DEF_MIN_MAX( long )
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DEF_MIN_MAX( unsigned long )
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DEF_MIN_MAX( float )
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DEF_MIN_MAX( double )
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#undef DEF_MIN_MAX
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/*
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// using const references generates crappy code, and I am currenly only using these
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// for built-in types, so they take arguments by value
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// TODO: remove
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inline int min( int x, int y )
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template<class T>
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inline T min( T x, T y )
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{
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if ( x < y )
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return x;
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return y;
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}
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template<class T>
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inline T max( T x, T y )
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{
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if ( x < y )
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return y;
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return x;
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}
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*/
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// TODO: good idea? bad idea?
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#undef byte
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#define byte byte_
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typedef unsigned char byte;
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// Setup compiler defines useful for exporting required public API symbols in gme.cpp
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#ifndef BLARGG_EXPORT
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#if defined (_WIN32) && defined(BLARGG_BUILD_DLL)
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#define BLARGG_EXPORT __declspec(dllexport)
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#elif defined (LIBGME_VISIBILITY)
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#define BLARGG_EXPORT __attribute__((visibility ("default")))
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#else
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#define BLARGG_EXPORT
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#endif
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#endif
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// deprecated
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#define BLARGG_CHECK_ALLOC CHECK_ALLOC
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#define BLARGG_RETURN_ERR RETURN_ERR
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// BLARGG_SOURCE_BEGIN: If defined, #included, allowing redefition of debug_printf and check
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#ifdef BLARGG_SOURCE_BEGIN
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#include BLARGG_SOURCE_BEGIN
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#endif
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#endif
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