+/*
+ *
+ * $Id: ghci.c,v 1.1 2001/07/30 10:40:36 rrt Exp $
+ *
+ * ghci wrapper - invokes ghc.exe with the added command-line
+ * option "--interactive".
+ *
+ * (c) The GHC Team 2001
+ *
+ * ghc.exe is searched for using the 'normal' search rules
+ * for DLLs / EXEs (i.e., first in the same dir as this wrapper,
+ * then system dirs, then PATH).
+ *
+ * To compile:
+ *
+ * MSVC: cl /o ghci.exe /c ghciwrap.c
+ * mingw: gcc -mno-cygwin -o ghci.exe ghciwrap.c
+ *
+ * If you want to associate your own icon with the wrapper,
+ * here's how to do it:
+ *
+ * * Create a one-line .rc file, ghci.rc (say), containing
+ * 0 ICON "hsicon.ico"
+ * (subst the string literal for the name of your icon file).
+ * * Compile it up (assuming the .ico file is in the same dir
+ * as the .rc file):
+ *
+ * MSVC: rc /I. ghci.rc /o ghci.res
+ * mingw: windres -o ghci.res -o ghci.rc -O coff
+ *
+ * * Add the resulting .res file to the link line of the wrapper:
+ *
+ * MSVC: cl /o ghci.exe /c ghciwrap.c ghci.res
+ * mingw: gcc -mno-cygwin -o ghci.exe ghciwrap.c ghci.res
+ *
+ */
+
+#include <windows.h>
+#include <stdio.h>
+#include <process.h>
+#include <malloc.h>
+
+#define BINARY_NAME "ghc.exe"
+#define IACTIVE_OPTION "--interactive"
+
+#define errmsg(msg) fprintf(stderr, msg "\n"); fflush(stderr)
+
+int
+main(int argc, char** argv)
+{
+ TCHAR binPath[FILENAME_MAX+1];
+ DWORD dwSize = FILENAME_MAX;
+ DWORD dwRes;
+ TCHAR* szEnd;
+ char** new_argv;
+ int i;
+
+ /* Locate the binary we want to start up */
+ dwRes =
+ SearchPath(NULL,
+ BINARY_NAME,
+ NULL,
+ dwSize,
+ binPath,
+ &szEnd);
+
+ if (dwRes == 0) {
+ errmsg("Unable to locate ghc.exe");
+ return 1;
+ }
+
+ new_argv = (char**)malloc(sizeof(char) * (argc + 1 + 1));
+ if (new_argv == NULL) {
+ errmsg("failed to start up ghc.exe");
+ return 1;
+ }
+ new_argv[0] = binPath;
+
+ new_argv[1] = (char*)malloc(sizeof(char) * (strlen(IACTIVE_OPTION) + 1));
+ if (new_argv[1]) {
+ strcpy(new_argv[1], IACTIVE_OPTION);
+ } else {
+ errmsg("failed to start up ghc.exe");
+ return 1;
+ }
+
+ for ( i=1; i < argc; i++ ) {
+ new_argv[i+1] = (char*)malloc(sizeof(char) * (strlen(argv[i] + 1)));
+ if (new_argv[i+1] == NULL) {
+ errmsg("failed to start up ghc.exe");
+ return 1;
+ } else {
+ strcpy(new_argv[i+1], argv[i]);
+ }
+ }
+ new_argv[i+1] = NULL;
+
+ /* I was hoping to be able to use execv() here, but
+ the MS implementation of said function doesn't appear to
+ be quite right (the 'parent' app seems to exit without
+ waiting, which is not a spec-fulfilling thing to do).
+
+ Cygwin gives me the right behaviour, but does it by
+ implementing it in terms of spawnv(), so you pay
+ the cost of having to create an extra process.
+
+ ==> Just use spawnv().
+ */
+ return _spawnv(_P_WAIT, binPath, new_argv);
+}