77 lines
2.4 KiB
C++
77 lines
2.4 KiB
C++
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// By default, #included at beginning of library source files.
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// Can be overridden by #defining BLARGG_SOURCE_BEGIN to path of alternate file.
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// Copyright (C) 2005 Shay Green.
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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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// 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 dprintf( const char* format, ... );
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#undef dprintf
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#ifdef BLARGG_DPRINTF
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#define dprintf BLARGG_DPRINTF
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#else
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inline void blargg_dprintf_( const char*, ... ) { }
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#define dprintf (1) ? (void) 0 : blargg_dprintf_
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#endif
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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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#ifdef BLARGG_CHECK
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#define check( expr ) BLARGG_CHECK( expr )
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#else
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#define check( expr ) ((void) 0)
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#endif
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// If expr returns non-NULL error string, return it from current function, otherwise continue.
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#define BLARGG_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 NULL, return out of memory error string.
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#define BLARGG_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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// 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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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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#endif
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