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testloadso.c
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/* Test program to test dynamic loading with the loadso subsystem.
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*/
#include <stdio.h>
#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
main(int argc, char *argv[])
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int retval = 0;
int hello = 0;
const char *libname = NULL;
const char *symname = NULL;
void *lib = NULL;
fntype fn = NULL;
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if (argc != 3) {
const char *app = argv[0];
fprintf(stderr, "USAGE: %s <library> <functionname>\n", app);
fprintf(stderr, " %s --hello <lib with puts()>\n", app);
return 1;
}
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/* Initialize SDL */
if (SDL_Init(0) < 0) {
fprintf(stderr, "Couldn't initialize SDL: %s\n", SDL_GetError());
return 2;
}
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if (strcmp(argv[1], "--hello") == 0) {
hello = 1;
libname = argv[2];
symname = "puts";
} else {
libname = argv[1];
symname = argv[2];
}
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lib = SDL_LoadObject(libname);
if (lib == NULL) {
fprintf(stderr, "SDL_LoadObject('%s') failed: %s\n",
libname, SDL_GetError());
retval = 3;
} else {
fn = (fntype) SDL_LoadFunction(lib, symname);
if (fn == NULL) {
fprintf(stderr, "SDL_LoadFunction('%s') failed: %s\n",
symname, SDL_GetError());
retval = 4;
} else {
printf("Found %s in %s at %p\n", symname, libname, fn);
if (hello) {
printf("Calling function...\n");
fflush(stdout);
fn(" HELLO, WORLD!\n");
printf("...apparently, we survived. :)\n");
printf("Unloading library...\n");
fflush(stdout);
}
}
SDL_UnloadObject(lib);
}
SDL_Quit();
return (0);