From 2623b3404c32136e76757a2029192333bdc3e8a8 Mon Sep 17 00:00:00 2001
From: rrt <unknown>
Date: Mon, 30 Jul 2001 10:40:36 +0000
Subject: [PATCH] [project @ 2001-07-30 10:40:36 by rrt] Add Sigbjorn's
 wrapper for ghci on Windows. ghci.exe will work from
 cmd.exe, bash, the Explorer &c. &c., i.e. it's a one-size
 fits all solution. Thanks, Sigbjorn!

---
 ghc/driver/ghci/Makefile |    9 +++-
 ghc/driver/ghci/ghci.c   |  110 ++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 117 insertions(+), 2 deletions(-)
 create mode 100644 ghc/driver/ghci/ghci.c

diff --git a/ghc/driver/ghci/Makefile b/ghc/driver/ghci/Makefile
index eb74961..99b5843 100644
--- a/ghc/driver/ghci/Makefile
+++ b/ghc/driver/ghci/Makefile
@@ -1,5 +1,5 @@
 #-----------------------------------------------------------------------------
-# $Id: Makefile,v 1.6 2001/06/27 15:26:56 chak Exp $
+# $Id: Makefile,v 1.7 2001/07/30 10:40:36 rrt Exp $
 #
 
 TOP=../..
@@ -27,6 +27,10 @@ endif
 INSTALLED_SCRIPT_PROG  = ghci-$(ProjectVersion)
 INPLACE_SCRIPT_PROG    = ghci-inplace
 
+ifeq "$(TARGETPLATFORM)" "i386-unknown-mingw32"
+C_PROG = ghci
+endif
+
 SCRIPT_OBJS	  = ghci.sh
 INTERP		  = $(SHELL)
 SCRIPT_SUBST_VARS = GHCBIN TOPDIROPT
@@ -35,7 +39,9 @@ TOPDIROPT 	  = -B$(GHCLIB)
 
 ifeq "$(INSTALLING)" "1"
 SCRIPT_PROG 	=  $(INSTALLED_SCRIPT_PROG)
+ifneq "$(TARGETPLATFORM)" "i386-unknown-mingw32"
 LINK 		=  ghci
+endif
 else
 SCRIPT_PROG 	=  $(INPLACE_SCRIPT_PROG)
 endif
@@ -48,4 +54,3 @@ all clean distclean maintainer-clean ::
 endif
 
 include $(TOP)/mk/target.mk
-
diff --git a/ghc/driver/ghci/ghci.c b/ghc/driver/ghci/ghci.c
new file mode 100644
index 0000000..bd75ac3
--- /dev/null
+++ b/ghc/driver/ghci/ghci.c
@@ -0,0 +1,110 @@
+/*
+ *
+ * $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);
+}
-- 
1.7.10.4