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

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• Hash : e542d1a3
  Author :
  Date : 2018-10-29T20:18:50
  

  winmain: Patched to compile on C89 compilers.

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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 (*bufp == ' ' || *bufp == '\t') {
              ++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 && (*bufp != ' ' && *bufp != '\t')) {
                  ++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 */
  # define console_ansi_main main
  # if UNICODE
  #  define console_wmain wmain
  # endif
  #endif
  
  /* Gets the arguments with GetCommandLine, converts them to argc and argv
     and calls SDL_main */
  static int
  main_getcmdline()
  {
      char **argv;
      int argc;
      char *cmdline = NULL;
      int retval = 0;
      int cmdalloc = 0;
      const TCHAR *text = GetCommandLine();
      const TCHAR *ptr;
      int argc_guess = 2;  /* space for NULL and initial argument. */
      int rc;
  
      /* make a rough guess of command line arguments. Overestimates if there
         are quoted things. */
      for (ptr = text; *ptr; ptr++) {
          if ((*ptr == ' ') || (*ptr == '\t')) {
              argc_guess++;
          }
      }
  
  #if UNICODE
      rc = WideCharToMultiByte(CP_UTF8, 0, text, -1, NULL, 0, NULL, NULL);
      if (rc > 0) {
          cmdalloc = rc + (sizeof (char *) * argc_guess);
          argv = (char **) VirtualAlloc(NULL, cmdalloc, MEM_RESERVE|MEM_COMMIT, PAGE_READWRITE);
          if (argv) {
              int rc2;
              cmdline = (char *) (argv + argc_guess);
              rc2 = WideCharToMultiByte(CP_UTF8, 0, text, -1, cmdline, rc, NULL, NULL);
              SDL_assert(rc2 == rc);
          }
      }
  #else
      /* !!! FIXME: are these in the system codepage? We need to convert to UTF-8. */
      rc = ((int) SDL_strlen(text)) + 1;
      cmdalloc = rc + (sizeof (char *) * argc_guess);
      argv = (char **) VirtualAlloc(NULL, cmdalloc, MEM_RESERVE|MEM_COMMIT, PAGE_READWRITE);
      if (argv) {
          cmdline = (char *) (argv + argc_guess);
          SDL_strcpy(cmdline, text);
      }
  #endif
      if (cmdline == NULL) {
          return OutOfMemory();
      }
  
      /* Parse it into argv and argc */
      SDL_assert(ParseCommandLine(cmdline, NULL) <= argc_guess);
      argc = ParseCommandLine(cmdline, argv);
  
      SDL_SetMainReady();
  
      /* Run the application main() code */
      retval = SDL_main(argc, argv);
  
      VirtualFree(argv, cmdalloc, MEM_DECOMMIT);
      VirtualFree(argv, 0, MEM_RELEASE);
  
      return retval;
  }
  
  /* This is where execution begins [console apps, ansi] */
  int
  console_ansi_main(int argc, char *argv[])
  {
      return main_getcmdline();
  }
  
  
  #if UNICODE
  /* This is where execution begins [console apps, unicode] */
  int
  console_wmain(int argc, wchar_t *wargv[], wchar_t *wenvp)
  {
      return main_getcmdline();
  }
  #endif
  
  /* This is where execution begins [windowed apps] */
  int WINAPI
  WinMain(HINSTANCE hInst, HINSTANCE hPrev, LPSTR szCmdLine, int sw)
  {
      return main_getcmdline();
  }
  
  #endif /* __WIN32__ */
  
  /* vi: set ts=4 sw=4 expandtab: */
  

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