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g_library.cpp
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g_library.cpp
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/*
* 3dyne Legacy Engine GPL Source Code
*
* Copyright (C) 1996-2012 Matthias C. Berger & Simon Berger.
*
* This file is part of the 3dyne Legacy Engine GPL Source Code ("3dyne Legacy
* Engine Source Code").
*
* 3dyne Legacy Engine Source Code is free software: you can redistribute it
* and/or modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation, either version 3 of the License,
* or (at your option) any later version.
*
* 3dyne Legacy Engine Source Code 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
* 3dyne Legacy Engine Source Code. If not, see
* <http://www.gnu.org/licenses/>.
*
* In addition, the 3dyne Legacy Engine Source Code is also subject to certain
* additional terms. You should have received a copy of these additional terms
* immediately following the terms and conditions of the GNU General Public
* License which accompanied the 3dyne Legacy Engine Source Code.
*
* Contributors:
* Matthias C. Berger ([email protected]) - initial API and implementation
* Simon Berger ([email protected]) - initial API and implementation
*/
// g_library.c
// shared lib handling
#include "interfaces.h"
#include "g_api.h"
#include "l_wrap.h"
// common api exdported to all libs;
static g_api_t g_api;
static bool_t g_api_valid = false;
// initialize common api
void G_LibInit()
{
if ( g_api_valid == true )
return;
g_api_valid = true;
g_api.version = G_API_VERSION;
g_api.size = G_API_SIZE;
g_api.ShockHandler = ShockHandler;
g_api.TF_Enter = TF_Enter;
g_api.TF_Leave = TF_Leave;
g_api.Malloc = _MM_Malloc;
g_api.Free = _MM_Free;
g_api.Printf = SHV_Printf;
g_api.SH_SetVar = SHP_SetVar;
g_api.SH_GetVar = SHP_GetVar;
g_api.Map_TraceBB = GI_MapTraceBB;
g_api.Map_TraceLine = GI_MapTraceLine;
g_api.Map_SelectShapeIDsInBoundBox = GI_SelectShapesInBoundBox;
g_api.Map_SelectLightSourceWhereAnyLightID = GI_SelectLightSourceWhereAnyLightID;
g_api.Map_LightSourceUpdate = GI_LightSourceUpdate;
g_api.Map_GetUniqueID = GI_GetUniqueID;
g_api.Map_ShapeIDSetFlatColor = GI_MapShapeIDSetFlatColor;
g_api.Render_Sprite = GI_RenderAddSprite;
g_api.Render_Psys = GI_RenderAddPsys;
g_api.Render_LocalLight = GI_RenderAddLocalLight;
g_api.Render_Model = GI_RenderAddModel;
g_api.Render_Halo = GI_RenderAddHalo;
g_api.Render_View = GI_RenderAddView;
g_api.Draw_Rect = GI_DrawRect;
g_api.Draw_Text = GI_DrawText;
g_api.GI_ResourceSearch = GI_ResourceSearch;
g_api.GI_ReadClass = GI_ReadClass;
}
int G_LibLoad( l_library_t *lib )
{
char filename[256];
l_api_t *api_ptr;
G_LibInit();
if( lib->isloaded )
{
__warning( "library is in use. name: '%s'\n", lib->name );
return 1;
}
#ifdef win32_x86
strcpy( filename, lib->name );
SYS_DllAddSuffix( filename, 0 );
#else
sprintf( filename, "dd1/%s", lib->name );
SYS_DllAddSuffix( filename, SYS_DLLSSYSTEM );
#endif
__named_message( "filename: %s\n", filename );
lib->h = SYS_DllBegin( filename );
lib->ApiExchange = (api_exchange_t)SYS_DllSym( lib->h, "ApiExchange" );
if( !lib->ApiExchange )
{
__warning( "symbol 'ApiExchange' not found in '%s'\n", filename );
lib->isloaded = 0;
SYS_DllEnd( lib->h );
return 1;
}
api_ptr = lib->ApiExchange( &g_api );
if( !api_ptr->valid )
{
__warning( "g_api is invalid for the dll, because:\n" );
if( api_ptr->version == API_LESS )
{
__message( "the dll is too old\n" );
} else if( api_ptr->version == API_MORE )
{
__message( "the dll is too new\n" );
} else if( api_ptr->size < 0 )
{
__message( "the dll has a different g_api size\n" );
} else
{
__message( "you should never see this warning\n" );
}
lib->isloaded = 0;
SYS_DllEnd( lib->h );
return 1;
}
if( api_ptr->size <= 0 )
{
__warning( "l_api->size <= 0, but not invalid. something went very bad\n" );
lib->isloaded = 0;
SYS_DllEnd( lib->h );
return 1;
}
if( api_ptr->version < L_API_VERSION )
{
__warning( "l_api is too old\n" );
lib->isloaded = 0;
SYS_DllEnd( lib->h );
return 1;
} else if( api_ptr->version > L_API_VERSION )
{
__warning( "l_api is too new.\n" );
lib->isloaded = 0;
SYS_DllEnd( lib->h );
return 1;
} else if( api_ptr->size < L_API_SIZE )
{
__warning( "l_api is too new.\n" );
lib->isloaded = 0;
SYS_DllEnd( lib->h );
return 1;
} else if( api_ptr->size > L_API_SIZE )
{
__warning( "l_api is too new.\n" );
lib->isloaded = 0;
SYS_DllEnd( lib->h );
return 1;
}
memcpy( &lib->api, api_ptr, L_API_SIZE );
__named_message( "%s APIs are valid\n", lib->api.owner );
lib->isloaded = 1;
return 0;
}
void G_LibUnload( l_library_t *lib )
{
if( !lib->isloaded )
{
__warning( "library is not loaded\n" );
return;
}
SYS_DllEnd( lib->h );
}