public/jit/jit_helpers.h

/**
 * vim: set ts=4 :
 * =============================================================================
 * SourcePawn JIT SDK
 * Copyright (C) 2004-2008 AlliedModders LLC.  All rights reserved.
 * =============================================================================
 *
 * This program is free software; you can redistribute it and/or modify it under
 * the terms of the GNU General Public License, version 3.0, as published by the
 * Free Software Foundation.
 * 
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 * FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
 * details.
 *
 * You should have received a copy of the GNU General Public License along with
 * this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 * As a special exception, AlliedModders LLC gives you permission to link the
 * code of this program (as well as its derivative works) to "Half-Life 2," the
 * "Source Engine," the "SourcePawn JIT," and any Game MODs that run on software
 * by the Valve Corporation.  You must obey the GNU General Public License in
 * all respects for all other code used.  Additionally, AlliedModders LLC grants
 * this exception to all derivative works.  AlliedModders LLC defines further
 * exceptions, found in LICENSE.txt (as of this writing, version JULY-31-2007),
 * or <http://www.sourcemod.net/license.php>.
 *
 * Version: $Id: jit_helpers.h 2459 2008-08-15 05:22:26Z dvander $
 */

#ifndef _INCLUDE_SOURCEPAWN_JIT_HELPERS_H_
#define _INCLUDE_SOURCEPAWN_JIT_HELPERS_H_

#include <sp_vm_types.h>
#include <sp_vm_api.h>

#if defined HAVE_STDINT_H && !defined WIN32
#include <stdint.h>
typedef int8_t jit_int8_t;
typedef uint8_t jit_uint8_t;
typedef int32_t jit_int32_t;
typedef uint32_t jit_uint32_t;
typedef int64_t jit_int64_t;
typedef uint64_t jit_uint64_t;
#elif defined WIN32
typedef __int8 jit_int8_t;
typedef unsigned __int8 jit_uint8_t;
typedef __int32 jit_int32_t;
typedef unsigned __int32 jit_uint32_t;
typedef __int64 jit_int64_t;
typedef unsigned __int64 jit_uint64_t;
#endif

typedef char * jitcode_t;
typedef unsigned int jitoffs_t;
typedef signed int jitrel_t;

class JitWriter
{
public:
          inline cell_t read_cell()
          {
                    cell_t val = *(inptr);
                    inptr++;
                    return val;
          }
          inline cell_t peek_cell()
          {
                    return *inptr;
          }
          inline cell_t *read_cellptr()
          {
                    cell_t *val = *(cell_t **)(inptr);
                    inptr++;
                    return val;
          }
          inline void write_ubyte(jit_uint8_t c)
          {
                    if (outbase)
                    {
                              *outptr = c;
                    }
                    outptr++;
          }
          inline void write_ushort(unsigned short c)
          {
                    if (outbase)
                    {
                              *(unsigned short *)outptr = c;
                    }
                    outptr += sizeof(unsigned short);
          }
          inline void write_byte(jit_int8_t c)
          {
                    if (outbase)
                    {
                              *outptr = c;
                    }
                    outptr++;
          }
          inline void write_int32(jit_int32_t c)
          {
                    if (outbase)
                    {
                              *(jit_int32_t *)outptr = c;
                    }
                    outptr += sizeof(jit_int32_t);
          }
          inline void write_uint32(jit_uint32_t c)
          {
                    if (outbase)
                    {
                              *(jit_uint32_t *)outptr = c;
                    }
                    outptr += sizeof(jit_uint32_t);
          }
          inline jitoffs_t get_outputpos()
          {
                    return (outptr - outbase);
          }
          inline void set_outputpos(jitoffs_t offs)
          {
                    outptr = outbase + offs;
          }
          inline jitoffs_t get_inputpos()
          {
                    return (jitoffs_t)((char *)inptr - (char *)inbase);
          }
public:
          cell_t *inptr;                /* input pointer */
          cell_t *inbase;               /* input base */
          jitcode_t outbase;  /* output pointer */
          jitcode_t outptr;   /* output base */
          SourcePawn::ICompilation *data;         /* compiler live info */
};

#endif //_INCLUDE_SOURCEPAWN_JIT_HELPERS_H_

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