82 lines
2.2 KiB
C
Executable file
82 lines
2.2 KiB
C
Executable file
/*
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Copyright (C) 1997-2022 Sam Lantinga <slouken@libsdl.org>
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This software is provided 'as-is', without any express or implied
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warranty. In no event will the authors be held liable for any damages
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arising from the use of this software.
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Permission is granted to anyone to use this software for any purpose,
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including commercial applications, and to alter it and redistribute it
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freely.
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*/
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/* Test program to test dynamic loading with the loadso subsystem.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "SDL.h"
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typedef int (*fntype) (const char *);
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int
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main(int argc, char *argv[])
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{
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int retval = 0;
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int hello = 0;
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const char *libname = NULL;
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const char *symname = NULL;
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void *lib = NULL;
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fntype fn = NULL;
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if (argc != 3) {
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const char *app = argv[0];
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SDL_Log("USAGE: %s <library> <functionname>\n", app);
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SDL_Log(" %s --hello <lib with puts()>\n", app);
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return 1;
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}
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/* Initialize SDL */
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if (SDL_Init(0) < 0) {
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SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Couldn't initialize SDL: %s\n", SDL_GetError());
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return 2;
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}
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if (SDL_strcmp(argv[1], "--hello") == 0) {
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hello = 1;
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libname = argv[2];
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symname = "puts";
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} else {
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libname = argv[1];
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symname = argv[2];
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}
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lib = SDL_LoadObject(libname);
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if (lib == NULL) {
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SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "SDL_LoadObject('%s') failed: %s\n",
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libname, SDL_GetError());
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retval = 3;
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} else {
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fn = (fntype) SDL_LoadFunction(lib, symname);
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if (fn == NULL) {
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SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "SDL_LoadFunction('%s') failed: %s\n",
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symname, SDL_GetError());
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retval = 4;
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} else {
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SDL_Log("Found %s in %s at %p\n", symname, libname, fn);
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if (hello) {
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SDL_Log("Calling function...\n");
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fflush(stdout);
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fn(" HELLO, WORLD!\n");
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SDL_Log("...apparently, we survived. :)\n");
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SDL_Log("Unloading library...\n");
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fflush(stdout);
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}
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}
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SDL_UnloadObject(lib);
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}
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SDL_Quit();
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return retval;
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}
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