kc3-lang/SDL/test/testloadso.c

Branch : - branch - v2.28 - tag -

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  Commit

• Author : Sylvain
  Date : 2021-11-21 22:30:48
  Hash : d31251b0
  Message : use SDL's functions version inplace of libc version

• test/testloadso.c

• /*
    Copyright (C) 1997-2021 Sam Lantinga <slouken@libsdl.org>
  
    This software is provided 'as-is', without any express or implied
    warranty.  In no event will the authors be held liable for any damages
    arising from the use of this software.
  
    Permission is granted to anyone to use this software for any purpose,
    including commercial applications, and to alter it and redistribute it
    freely.
  */
  
  /* Test program to test dynamic loading with the loadso subsystem.
  */
  
  #include <stdio.h>
  #include <stdlib.h>
  #include <string.h>
  
  #include "SDL.h"
  
  typedef int (*fntype) (const char *);
  
  int
  main(int argc, char *argv[])
  {
      int retval = 0;
      int hello = 0;
      const char *libname = NULL;
      const char *symname = NULL;
      void *lib = NULL;
      fntype fn = NULL;
  
      if (argc != 3) {
          const char *app = argv[0];
          SDL_Log("USAGE: %s <library> <functionname>\n", app);
          SDL_Log("       %s --hello <lib with puts()>\n", app);
          return 1;
      }
  
      /* Initialize SDL */
      if (SDL_Init(0) < 0) {
          SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Couldn't initialize SDL: %s\n", SDL_GetError());
          return 2;
      }
  
      if (SDL_strcmp(argv[1], "--hello") == 0) {
          hello = 1;
          libname = argv[2];
          symname = "puts";
      } else {
          libname = argv[1];
          symname = argv[2];
      }
  
      lib = SDL_LoadObject(libname);
      if (lib == NULL) {
          SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "SDL_LoadObject('%s') failed: %s\n",
                  libname, SDL_GetError());
          retval = 3;
      } else {
          fn = (fntype) SDL_LoadFunction(lib, symname);
          if (fn == NULL) {
              SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "SDL_LoadFunction('%s') failed: %s\n",
                      symname, SDL_GetError());
              retval = 4;
          } else {
              SDL_Log("Found %s in %s at %p\n", symname, libname, fn);
              if (hello) {
                  SDL_Log("Calling function...\n");
                  fflush(stdout);
                  fn("     HELLO, WORLD!\n");
                  SDL_Log("...apparently, we survived.  :)\n");
                  SDL_Log("Unloading library...\n");
                  fflush(stdout);
              }
          }
          SDL_UnloadObject(lib);
      }
      SDL_Quit();
      return retval;
  }