test/testloadso.c

   1
   2 /* Test program to test dynamic loading with the loadso subsystem.
   3 */
   4
   5 #include <stdio.h>
   6 #include <stdlib.h>
   7
   8 #include "SDL.h"
   9
  10 typedef int (*fntype)(const char *);
  11
  12 int main(int argc, char *argv[])
  13 {
  14         int retval = 0;
  15         int hello = 0;
  16         const char *libname = NULL;
  17         const char *symname = NULL;
  18         void *lib = NULL;
  19         fntype fn = NULL;
  20
  21         if (argc != 3) {
  22                 const char *app = argv[0];
  23                 fprintf(stderr, "USAGE: %s <library> <functionname>\n", app);
  24                 fprintf(stderr, "       %s --hello <lib with puts()>\n", app);
  25                 return 1;
  26         }
  27
  28         /* Initialize SDL */
  29         if ( SDL_Init(0) < 0 ) {
  30                 fprintf(stderr, "Couldn't initialize SDL: %s\n",SDL_GetError());
  31                 return 2;
  32         }
  33
  34         if (strcmp(argv[1], "--hello") == 0) {
  35                 hello = 1;
  36                 libname = argv[2];
  37                 symname = "puts";
  38         } else {
  39                 libname = argv[1];
  40                 symname = argv[2];
  41         }
  42
  43         lib = SDL_LoadObject(libname);
  44         if (lib == NULL) {
  45                 fprintf(stderr, "SDL_LoadObject('%s') failed: %s\n",
  46                         libname, SDL_GetError());
  47                 retval = 3;
  48         } else {
  49                 fn = (fntype) SDL_LoadFunction(lib, symname);
  50                 if (fn == NULL) {
  51                         fprintf(stderr, "SDL_LoadFunction('%s') failed: %s\n",
  52                                 symname, SDL_GetError());
  53                         retval = 4;
  54                 } else {
  55                         printf("Found %s in %s at %p\n", symname, libname, fn);
  56                         if (hello) {
  57                                 printf("Calling function...\n");
  58                                 fflush(stdout);
  59                                 fn("     HELLO, WORLD!\n");
  60                                 printf("...apparently, we survived.  :)\n");
  61                                 printf("Unloading library...\n");
  62                                 fflush(stdout);
  63                         }
  64                 }
  65                 SDL_UnloadObject(lib);
  66         }
  67         SDL_Quit();
  68         return(0);
  69 }
  70
  71