SDL_loadso.c
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/*
SDL - Simple DirectMedia Layer
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Copyright (C) 1997-2006 Sam Lantinga
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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This library 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
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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Sam Lantinga
slouken@libsdl.org
*/
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
/* System dependent library loading routines */
#if !SDL_INTERNAL_BUILDING_LOADSO
#error Do not compile directly...compile src/SDL_loadso.c instead!
#endif
#if !defined(WIN32) && !defined(_WIN32_WCE)
#error Compiling for the wrong platform?
#endif
#include <stdio.h>
#include <windows.h>
#include "SDL_types.h"
#include "SDL_error.h"
#include "SDL_loadso.h"
void *SDL_LoadObject(const char *sofile)
{
void *handle = NULL;
const char *loaderror = "Unknown error";
#if defined(_WIN32_WCE)
char errbuf[512];
wchar_t *errbuf_t = malloc(512 * sizeof(wchar_t));
wchar_t *sofile_t = malloc((MAX_PATH+1) * sizeof(wchar_t));
MultiByteToWideChar(CP_ACP, MB_PRECOMPOSED, sofile, -1, sofile_t, MAX_PATH);
handle = (void *)LoadLibrary(sofile_t);
/* Generate an error message if all loads failed */
if ( handle == NULL ) {
FormatMessage((FORMAT_MESSAGE_IGNORE_INSERTS |
FORMAT_MESSAGE_FROM_SYSTEM),
NULL, GetLastError(),
MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
errbuf_t, SDL_TABLESIZE(errbuf), NULL);
WideCharToMultiByte(CP_ACP, 0, errbuf_t, -1, errbuf, 511, NULL, NULL);
loaderror = errbuf;
}
free(sofile_t);
free(errbuf_t);
#else /*if defined(WIN32)*/
char errbuf[512];
handle = (void *)LoadLibrary(sofile);
/* Generate an error message if all loads failed */
if ( handle == NULL ) {
FormatMessage((FORMAT_MESSAGE_IGNORE_INSERTS |
FORMAT_MESSAGE_FROM_SYSTEM),
NULL, GetLastError(),
MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
errbuf, SDL_TABLESIZE(errbuf), NULL);
loaderror = errbuf;
}
#endif
if ( handle == NULL ) {
SDL_SetError("Failed loading %s: %s", sofile, loaderror);
}
return(handle);
}
void *SDL_LoadFunction(void *handle, const char *name)
{
void *symbol = NULL;
const char *loaderror = "Unknown error";
#if defined(_WIN32_WCE)
char errbuf[512];
int length = strlen(name);
wchar_t *name_t = malloc((length + 1) * sizeof(wchar_t));
wchar_t *errbuf_t = malloc(512 * sizeof(wchar_t));
MultiByteToWideChar(CP_ACP, MB_PRECOMPOSED, name, -1, name_t, length);
symbol = (void *)GetProcAddress((HMODULE)handle, name_t);
if ( symbol == NULL ) {
FormatMessage((FORMAT_MESSAGE_IGNORE_INSERTS |
FORMAT_MESSAGE_FROM_SYSTEM),
NULL, GetLastError(),
MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
errbuf_t, SDL_TABLESIZE(errbuf), NULL);
WideCharToMultiByte(CP_ACP, 0, errbuf_t, -1, errbuf, 511, NULL, NULL);
loaderror = errbuf;
}
free(name_t);
free(errbuf_t);
#else /*if defined(WIN32)*/
char errbuf[512];
symbol = (void *)GetProcAddress((HMODULE)handle, name);
if ( symbol == NULL ) {
FormatMessage((FORMAT_MESSAGE_IGNORE_INSERTS |
FORMAT_MESSAGE_FROM_SYSTEM),
NULL, GetLastError(),
MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
errbuf, SDL_TABLESIZE(errbuf), NULL);
loaderror = errbuf;
}
#endif
if ( symbol == NULL ) {
SDL_SetError("Failed loading %s: %s", name, loaderror);
}
return(symbol);
}
void SDL_UnloadObject(void *handle)
{
if ( handle != NULL ) {
FreeLibrary((HMODULE)handle);
}
}