Add support for launcher.exe

PC/WinMain.c

@@ -2,9 +2,25 @@
 
 #define WIN32_LEAN_AND_MEAN
 #include <windows.h>
+#include <fcntl.h>
 
 #include "Python.h"
 
+#ifdef LAUNCHER
+/* Q105305 suggests this routine to adjust the handles. */
+static void adjust_file(DWORD handle, FILE* f, char* mode)
+{
+    int hCrt;
+    FILE *hf;
+    hCrt = _open_osfhandle((intptr_t)GetStdHandle(handle), _O_TEXT);
+    hf = _fdopen(hCrt, mode);
+    *f = *hf;
+    setvbuf(f, NULL, _IONBF, 0);
+    /* Alternatively, we could use __set_app_type and _set_osfhnd, 
+       but that appears to be undocumented. */
+}
+#endif
+
 int WINAPI WinMain(
     HINSTANCE hInstance,      /* handle to current instance */
     HINSTANCE hPrevInstance,  /* handle to previous instance */
@@ -12,5 +28,19 @@ int WINAPI WinMain(
     int nCmdShow              /* show state of window */
 )
 {
+#ifdef LAUNCHER
+    int i;
+    if (__argc > 1 && strcmp(__argv[1], "-console") == 0) {
+	/* Allocate a console, and remove the -console argument. */
+	AllocConsole();
+	for (i = 2; i < __argc; i++)
+	    __argv[i-1] = __argv[i];
+        __argc--;
+	/* Make stdin, stdout, stderr use the newly allocated OS handles. */
+	adjust_file(STD_INPUT_HANDLE, stdin, "r");
+	adjust_file(STD_OUTPUT_HANDLE, stdout, "w");
+	adjust_file(STD_ERROR_HANDLE, stderr, "w");
+    }
+#endif
     return Py_Main(__argc, __argv);
 }