153 lines
4.0 KiB
C++
153 lines
4.0 KiB
C++
// Sets up common environment for Shay Green's libraries.
|
|
// To change configuration options, modify blargg_config.h, not this file.
|
|
|
|
#ifndef BLARGG_COMMON_H
|
|
#define BLARGG_COMMON_H
|
|
|
|
#include <stddef.h>
|
|
#include <stdlib.h>
|
|
#include <assert.h>
|
|
#include <limits.h>
|
|
|
|
#undef BLARGG_COMMON_H
|
|
// allow blargg_config.h to #include blargg_common.h
|
|
#include "blargg_config.h"
|
|
#ifndef BLARGG_COMMON_H
|
|
#define BLARGG_COMMON_H
|
|
|
|
// BLARGG_RESTRICT: equivalent to restrict, where supported
|
|
#if __GNUC__ >= 3 || _MSC_VER >= 1100
|
|
#define BLARGG_RESTRICT __restrict
|
|
#else
|
|
#define BLARGG_RESTRICT
|
|
#endif
|
|
|
|
// STATIC_CAST(T,expr): Used in place of static_cast<T> (expr)
|
|
#ifndef STATIC_CAST
|
|
#define STATIC_CAST(T,expr) ((T) (expr))
|
|
#endif
|
|
|
|
// blargg_err_t (0 on success, otherwise error string)
|
|
#ifndef blargg_err_t
|
|
typedef const char* blargg_err_t;
|
|
#endif
|
|
|
|
// blargg_vector - very lightweight vector of POD types (no constructor/destructor)
|
|
template<class T>
|
|
class blargg_vector {
|
|
T* begin_;
|
|
size_t size_;
|
|
public:
|
|
blargg_vector() : begin_( 0 ), size_( 0 ) { }
|
|
~blargg_vector() { free( begin_ ); }
|
|
size_t size() const { return size_; }
|
|
T* begin() const { return begin_; }
|
|
T* end() const { return begin_ + size_; }
|
|
blargg_err_t resize( size_t n )
|
|
{
|
|
void* p = realloc( begin_, n * sizeof (T) );
|
|
if ( !p && n )
|
|
return "Out of memory";
|
|
begin_ = (T*) p;
|
|
size_ = n;
|
|
return 0;
|
|
}
|
|
void clear() { free( begin_ ); begin_ = nullptr; size_ = 0; }
|
|
T& operator [] ( size_t n ) const
|
|
{
|
|
assert( n <= size_ ); // <= to allow past-the-end value
|
|
return begin_ [n];
|
|
}
|
|
};
|
|
|
|
// Use to force disable exceptions for allocations of a class
|
|
#include <new>
|
|
#ifndef BLARGG_DISABLE_NOTHROW
|
|
#define BLARGG_DISABLE_NOTHROW \
|
|
void* operator new ( size_t s ) noexcept { return malloc( s ); }\
|
|
void* operator new ( size_t s, const std::nothrow_t& ) noexcept { return malloc( s ); }\
|
|
void operator delete ( void* p ) noexcept { free( p ); }
|
|
#endif
|
|
|
|
// Use to force disable exceptions for a specific allocation no matter what class
|
|
#define BLARGG_NEW new (std::nothrow)
|
|
|
|
// BLARGG_4CHAR('a','b','c','d') = 'abcd' (four character integer constant)
|
|
#define BLARGG_4CHAR( a, b, c, d ) \
|
|
((a&0xFF)*0x1000000L + (b&0xFF)*0x10000L + (c&0xFF)*0x100L + (d&0xFF))
|
|
|
|
#define BLARGG_2CHAR( a, b ) \
|
|
((a&0xFF)*0x100L + (b&0xFF))
|
|
|
|
// BLARGG_COMPILER_HAS_BOOL: If 0, provides bool support for old compiler. If 1,
|
|
// compiler is assumed to support bool. If undefined, availability is determined.
|
|
#ifndef BLARGG_COMPILER_HAS_BOOL
|
|
#if defined (__MWERKS__)
|
|
#if !__option(bool)
|
|
#define BLARGG_COMPILER_HAS_BOOL 0
|
|
#endif
|
|
#elif defined (_MSC_VER)
|
|
#if _MSC_VER < 1100
|
|
#define BLARGG_COMPILER_HAS_BOOL 0
|
|
#endif
|
|
#elif defined (__GNUC__)
|
|
// supports bool
|
|
#elif __cplusplus < 199711
|
|
#define BLARGG_COMPILER_HAS_BOOL 0
|
|
#endif
|
|
#endif
|
|
#if defined (BLARGG_COMPILER_HAS_BOOL) && !BLARGG_COMPILER_HAS_BOOL
|
|
// If you get errors here, modify your blargg_config.h file
|
|
typedef int bool;
|
|
const bool true = 1;
|
|
const bool false = 0;
|
|
#endif
|
|
|
|
#if defined(__has_cpp_attribute)
|
|
# if __has_cpp_attribute(maybe_unused)
|
|
# define BLARGG_MAYBE_UNUSED [[maybe_unused]]
|
|
# endif
|
|
#endif
|
|
|
|
#ifndef BLARGG_MAYBE_UNUSED
|
|
# define BLARGG_MAYBE_UNUSED
|
|
#endif
|
|
|
|
// blargg_long/blargg_ulong = at least 32 bits, int if it's big enough
|
|
|
|
#if INT_MAX < 0x7FFFFFFF || LONG_MAX == 0x7FFFFFFF
|
|
typedef long blargg_long;
|
|
#else
|
|
typedef int blargg_long;
|
|
#endif
|
|
|
|
#if UINT_MAX < 0xFFFFFFFF || ULONG_MAX == 0xFFFFFFFF
|
|
typedef unsigned long blargg_ulong;
|
|
#else
|
|
typedef unsigned blargg_ulong;
|
|
#endif
|
|
|
|
// int8_t etc.
|
|
|
|
// TODO: Add CMake check for this, although I'd likely just point affected
|
|
// persons to a real compiler...
|
|
#if 1 || defined (HAVE_STDINT_H)
|
|
#include <stdint.h>
|
|
#endif
|
|
|
|
#if __GNUC__ >= 3
|
|
#define BLARGG_DEPRECATED __attribute__ ((deprecated))
|
|
#else
|
|
#define BLARGG_DEPRECATED
|
|
#endif
|
|
|
|
// Use in place of "= 0;" for a pure virtual, since these cause calls to std C++ lib.
|
|
// During development, BLARGG_PURE( x ) expands to = 0;
|
|
// virtual int func() BLARGG_PURE( { return 0; } )
|
|
#ifndef BLARGG_PURE
|
|
#define BLARGG_PURE( def ) def
|
|
#endif
|
|
|
|
#endif
|
|
#endif
|