kc3-lang/SDL/src/main/windows/SDL_windows_main.c

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• Hash : d870f271
  Author :
  Date : 2016-10-01T12:31:31
  

  Fixed bug 3320 - SDL_windows_main.c defines both console application entry points Simon Hug The SDLmain file src/main/windows/SDL_windows_main.c defines both entry points for console applications, main and wmain. This seems to confuse MSVC. It outputs a LNK4067 warning and then chooses main, which is a shame because only wmain has the unicode handling. Using SDLmain.lib provided on libsdl.org, the linker also goes for main. I'm proposing to not define the main entry point at all. wmain should be supported well enough with MSVC.

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• src/main/windows/SDL_windows_main.c

• /*
      SDL_windows_main.c, placed in the public domain by Sam Lantinga  4/13/98
  
      The WinMain function -- calls your program's main() function
  */
  #include "SDL_config.h"
  
  #ifdef __WIN32__
  
  /* Include this so we define UNICODE properly */
  #include "../../core/windows/SDL_windows.h"
  
  /* Include the SDL main definition header */
  #include "SDL.h"
  #include "SDL_main.h"
  
  #ifdef main
  #  undef main
  #endif /* main */
  
  static void
  UnEscapeQuotes(char *arg)
  {
      char *last = NULL;
  
      while (*arg) {
          if (*arg == '"' && (last != NULL && *last == '\\')) {
              char *c_curr = arg;
              char *c_last = last;
  
              while (*c_curr) {
                  *c_last = *c_curr;
                  c_last = c_curr;
                  c_curr++;
              }
              *c_last = '\0';
          }
          last = arg;
          arg++;
      }
  }
  
  /* Parse a command line buffer into arguments */
  static int
  ParseCommandLine(char *cmdline, char **argv)
  {
      char *bufp;
      char *lastp = NULL;
      int argc, last_argc;
  
      argc = last_argc = 0;
      for (bufp = cmdline; *bufp;) {
          /* Skip leading whitespace */
          while (SDL_isspace(*bufp)) {
              ++bufp;
          }
          /* Skip over argument */
          if (*bufp == '"') {
              ++bufp;
              if (*bufp) {
                  if (argv) {
                      argv[argc] = bufp;
                  }
                  ++argc;
              }
              /* Skip over word */
              lastp = bufp;
              while (*bufp && (*bufp != '"' || *lastp == '\\')) {
                  lastp = bufp;
                  ++bufp;
              }
          } else {
              if (*bufp) {
                  if (argv) {
                      argv[argc] = bufp;
                  }
                  ++argc;
              }
              /* Skip over word */
              while (*bufp && !SDL_isspace(*bufp)) {
                  ++bufp;
              }
          }
          if (*bufp) {
              if (argv) {
                  *bufp = '\0';
              }
              ++bufp;
          }
  
          /* Strip out \ from \" sequences */
          if (argv && last_argc != argc) {
              UnEscapeQuotes(argv[last_argc]);
          }
          last_argc = argc;
      }
      if (argv) {
          argv[argc] = NULL;
      }
      return (argc);
  }
  
  /* Pop up an out of memory message, returns to Windows */
  static BOOL
  OutOfMemory(void)
  {
      SDL_ShowSimpleMessageBox(SDL_MESSAGEBOX_ERROR, "Fatal Error", "Out of memory - aborting", NULL);
      return FALSE;
  }
  
  #if defined(_MSC_VER)
  /* The VC++ compiler needs main/wmain defined */
  # if UNICODE
  #  define console_wmain wmain
  # else
  #  define console_ansi_main main
  # endif
  #endif
  
  /* WinMain, main, and wmain eventually call into here. */
  static int
  main_utf8(int argc, char *argv[])
  {
      SDL_SetMainReady();
  
      /* Run the application main() code */
      return SDL_main(argc, argv);
  }
  
  /* This is where execution begins [console apps, ansi] */
  int
  console_ansi_main(int argc, char *argv[])
  {
      /* !!! FIXME: are these in the system codepage? We need to convert to UTF-8. */
      return main_utf8(argc, argv);
  }
  
  
  #if UNICODE
  /* This is where execution begins [console apps, unicode] */
  int
  console_wmain(int argc, wchar_t *wargv[], wchar_t *wenvp)
  {
      int retval = 0;
      char **argv = SDL_stack_alloc(char*, argc + 1);
      int i;
  
      for (i = 0; i < argc; ++i) {
          argv[i] = WIN_StringToUTF8(wargv[i]);
      }
      argv[argc] = NULL;
  
      retval = main_utf8(argc, argv);
  
      /* !!! FIXME: we are leaking all the elements of argv we allocated. */
      SDL_stack_free(argv);
  
      return retval;
  }
  #endif
  
  /* This is where execution begins [windowed apps] */
  int WINAPI
  WinMain(HINSTANCE hInst, HINSTANCE hPrev, LPSTR szCmdLine, int sw)
  {
      char **argv;
      int argc;
      char *cmdline;
  
      /* Grab the command line */
      TCHAR *text = GetCommandLine();
  #if UNICODE
      cmdline = WIN_StringToUTF8(text);
  #else
      /* !!! FIXME: are these in the system codepage? We need to convert to UTF-8. */
      cmdline = SDL_strdup(text);
  #endif
      if (cmdline == NULL) {
          return OutOfMemory();
      }
  
      /* Parse it into argv and argc */
      argc = ParseCommandLine(cmdline, NULL);
      argv = SDL_stack_alloc(char *, argc + 1);
      if (argv == NULL) {
          return OutOfMemory();
      }
      ParseCommandLine(cmdline, argv);
  
      /* Run the main program */
      main_utf8(argc, argv);
  
      SDL_stack_free(argv);
  
      SDL_free(cmdline);
  
      /* Hush little compiler, don't you cry... */
      return 0;
  }
  
  #endif /* __WIN32__ */
  
  /* vi: set ts=4 sw=4 expandtab: */
  

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