UnGnuG.H

See Native Coding On Linux for information on how to use this headerfile.

/*=============================================================================
    UnGnuG.h: Unreal definitions for Gnu G++. Unfinished. Unsupported.
    Copyright 1997-1999 Epic Games, Inc. All Rights Reserved.
=============================================================================*/

/*----------------------------------------------------------------------------
    Platform compiler definitions.
----------------------------------------------------------------------------*/

#ifdef __LINUX_X86__
    #define __UNIX__  1
    #define __LINUX__ 1
    #define __INTEL__ 1
    #define __INTEL_BYTE_ORDER__ 1
    #undef ASM
    #undef ASM3DNOW
    #undef ASMKNI
    #define ASMLINUX 1
#else
    #error Unsupported platform.
#endif

// Stack control.
#include <sys/wait.h>
#include <signal.h>
#include <setjmp.h>
class __Context
{
public:
    __Context() { Last = Env; }
    ~__Context() { Env = Last; }
    static void StaticInit();
    static jmp_buf Env;

protected:
    static void HandleSignal( int Sig );
    static struct sigaction Act_SIGHUP;
    static struct sigaction Act_SIGQUIT;
    static struct sigaction Act_SIGILL;
    static struct sigaction Act_SIGTRAP;
    static struct sigaction Act_SIGIOT;
    static struct sigaction Act_SIGBUS;
    static struct sigaction Act_SIGFPE;
    static struct sigaction Act_SIGSEGV;
    static struct sigaction Act_SIGTERM;
    jmp_buf Last;
};

/*----------------------------------------------------------------------------
    Platform specifics types and defines.
----------------------------------------------------------------------------*/

// Undo any Windows defines.
#undef BYTE
#undef WORD
#undef DWORD
#undef INT
#undef FLOAT
#undef MAXBYTE
#undef MAXWORD
#undef MAXDWORD
#undef MAXINT
#undef VOID
#undef CDECL

// Make sure HANDLE is defined.
#define HANDLE DWORD
#define HINSTANCE DWORD

// Sizes.
enum {DEFAULT_ALIGNMENT = 8 }; // Default boundary to align memory allocations on.
enum {CACHE_LINE_SIZE   = 32}; // Cache line size.
#define GCC_PACK(n) __attribute__((packed,aligned(n)))

// Optimization macros
#define DISABLE_OPTIMIZATION
#define ENABLE_OPTIMIZATION

// Function type macros.
#define DLL_IMPORT
#define DLL_EXPORT          extern "C"
#define DLL_EXPORT_CLASS
#define VARARGS
#define CDECL
#define STDCALL
#define FORCEINLINE /* Force code to be inline */
#define ZEROARRAY 0 /* Zero-length arrays in structs */
#define __cdecl

// Variable arguments.
#define GET_VARARGS(msg,len,fmt)    \
{   \
    va_list ArgPtr; \
    va_start( ArgPtr, fmt );    \
    vsprintf( msg, fmt, ArgPtr );   \
    va_end( ArgPtr );   \
}

#define GET_VARARGS_RESULT(msg,len,fmt,result)  \
{   \
    va_list ArgPtr; \
    va_start( ArgPtr, fmt );    \
    result = vsprintf( msg, fmt, ArgPtr );  \
    va_end( ArgPtr );   \
}

// Compiler name.
#define COMPILER "Compiled with GNU g++ ("__VERSION__")"

// Unsigned base types.
typedef unsigned char       BYTE;       // 8-bit  unsigned.
typedef unsigned short      _WORD;      // 16-bit unsigned.
typedef unsigned int        DWORD;      // 32-bit unsigned.
typedef unsigned long long  QWORD;      // 64-bit unsigned.

// Signed base types.
typedef signed char         SBYTE;      // 8-bit  signed.
typedef signed short        SWORD;      // 16-bit signed.
typedef signed int          INT;        // 32-bit signed.
typedef signed long long    SQWORD;     // 64-bit signed.

// Character types.
typedef char                ANSICHAR;   // An ANSI character.
typedef unsigned short      UNICHAR;    // A unicode character.
typedef unsigned char       ANSICHARU;  // An ANSI character.
typedef unsigned short      UNICHARU;   // A unicode character.

// Other base types.
typedef signed int          UBOOL;      // Boolean 0 (false) or 1 (true).
typedef float               FLOAT;      // 32-bit IEEE floating point.
typedef double              DOUBLE;     // 64-bit IEEE double.
typedef unsigned int        SIZE_T;     // Corresponds to C SIZE_T.

// Bitfield type.
typedef unsigned int        BITFIELD;   // For bitfields.

typedef unsigned int size_t;

// Make sure characters are unsigned.
#ifdef __CHAR_UNSIGNED__
    #error "Bad compiler option: Characters must be signed"
#endif

// Strings.
#if __UNIX__
#define LINE_TERMINATOR TEXT("\n")
#define PATH_SEPARATOR TEXT("/")
#define DLLEXT TEXT(".so")
#else
#define LINE_TERMINATOR TEXT("\r\n")
#define PATH_SEPARATOR TEXT("\\")
#define DLLEXT TEXT(".dll")
#endif

// NULL.
#undef NULL
#define NULL 0

// Package implementation.
#define IMPLEMENT_PACKAGE_PLATFORM(pkgname) \
    extern "C" {HINSTANCE hInstance;} \
    BYTE GLoaded##pkgname;

// Platform support options.
#define PLATFORM_NEEDS_ARRAY_NEW 1
#define FORCE_ANSI_LOG           0

// OS unicode function calling.
#define TCHAR_CALL_OS(funcW,funcA) (funcA)
#define TCHAR_TO_ANSI(str) str
#define ANSI_TO_TCHAR(str) str

// !! Fixme: This is a workaround.
#define GCC_OPT_INLINE

// Memory
#define appAlloca(size) alloca((size+7)&~7)

extern CORE_API UBOOL GTimestamp;
CORE_API extern FLOAT GSecondsPerCycle;

//
// Round a floating point number to an integer.
// Note that (int+.5) is rounded to (int+1).
//
#define DEFINED_appRound 1
inline INT appRound( FLOAT F )
{
    return (INT)(F);
}

//
// Converts to integer equal to or less than.
//
#define DEFINED_appFloor 1
inline INT appFloor( FLOAT F )
{
    static FLOAT Half=0.5;
    return (INT)(F - Half);
}

//
// CPU cycles, related to GSecondsPerCycle.
//
#define DEFINED_appCycles 1
inline DWORD appCycles()
{
    if( GTimestamp )
    {
        DWORD r;
        asm("rdtsc" : "=a" (r) : "d" (r));
        return r;
    }
}

//
// Memory copy.
//
#define DEFINED_appMemcpy 1
inline void appMemcpy( void* Dest, const void* Src, INT Count )
{
    asm volatile("
        pushl %%ebx;
        pushl %%ecx;
        pushl %%esi;
        pushl %%edi;
        mov %%ecx, %%ebx;
        shr $2, %%ecx;
        and $3, %%ebx;
        rep;
        movsl;
        mov %%ebx, %%ecx;
        rep;
        movsb;
        popl %%edi;
        popl %%esi;
        popl %%ecx;
        popl %%ebx;
    "
    :
    : "S" (Src),
      "D" (Dest),
      "c" (Count)
    );
}

//
// Memory zero.
//
#define DEFINED_appMemzero 1
inline void appMemzero( void* Dest, INT Count )
{
    memset( Dest, 0, Count );
}

/*----------------------------------------------------------------------------
    Globals.
----------------------------------------------------------------------------*/

// System identification.
extern "C"
{
    extern HINSTANCE      hInstance;
    extern CORE_API UBOOL GIsMMX;
    extern CORE_API UBOOL GIsPentiumPro;
    extern CORE_API UBOOL GIsKatmai;
    extern CORE_API UBOOL GIsK6;
    extern CORE_API UBOOL GIs3DNow;
    extern CORE_API UBOOL GTimestamp;
}

// Module name
extern ANSICHAR GModule[32];

/*----------------------------------------------------------------------------

    The End.
----------------------------------------------------------------------------*/

El Muerte TDS: Intresting header, but why here ?

Mr.Mitchell: It is related to Native Coding On Linux, as far as I understand you need it to compile UT native mods on Linux