* of this file, and for a DISCLAIMER OF ALL WARRANTIES.
 *
 * RCS: @(#) $Id$
 */

#ifdef KIT_INCLUDES_TK
#  include <tk.h>


#endif /* KIT_INCLUDES_TK */
#include <tcl.h>

#ifdef _WIN32
#  define WIN32_LEAN_AND_MEAN
#  include <windows.h>
#  undef WIN32_LEAN_AND_MEAN
#endif /* _WIN32 */

Tcl_AppInitProc Vfs_Init, Rechan_Init;
#ifdef KIT_INCLUDES_PWB
Tcl_AppInitProc	Pwb_Init;
#endif
#ifdef KIT_INCLUDES_ZLIB
Tcl_AppInitProc Zlib_Init;
#endif
#ifdef KIT_STORAGE_CVFS
Tcl_AppInitProc Cvfs_data_tcl_Init;
#endif
#ifdef TCL_THREADS
Tcl_AppInitProc	Thread_Init;
#endif
#ifdef _WIN32
Tcl_AppInitProc	Dde_Init, Registry_Init;
#endif

#ifdef TCLKIT_DLL
#  define TCLKIT_MOUNTPOINT "/.KITDLL_TCL"
#  define TCLKIT_VFSSOURCE "$::tclKitFilename"
#else
#  define TCLKIT_MOUNTPOINT "[info nameofexecutable]"
#  define TCLKIT_VFSSOURCE "[info nameofexecutable]"
#endif /* TCLKIT_DLL */

#ifdef HAVE_ACCEPTABLE_DLADDR
#  ifdef KITSH_NEED_WINMAIN
#    ifdef _WIN32_WCE
int wWinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpszCmdLine, int nCmdShow);
#    else
int WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpszCmdLine, int nCmdShow);
#    endif /* _WIN32_WCE */
#  endif /* KITSH_NEED_WINMAIN */
int main(int argc, char **argv);
#endif /* HAVE_ACCEPTABLE_DLADDR */

#ifdef TCLKIT_REQUIRE_TCLEXECUTABLENAME
char *tclExecutableName;
#endif

/*
 *  Attempt to load a "boot.tcl" entry from the embedded MetaKit file.
 *  If there isn't one, try to open a regular "setup.tcl" file instead.
 *  If that fails, this code will throw an error, using a message box.
 */
/*
 * This Tcl code is invoked whenever Tcl_Init() is called on an
 * interpreter.  It should mount up the VFS and make everything ready for
 * that interpreter to do its job.
 */
static char *preInitCmd = 
#if defined(_WIN32_WCE) && !defined(TCLKIT_DLL)
/* silly hack to get wince port to launch, some sort of std{in,out,err} problem */
"open /kitout.txt a; open /kitout.txt a; open /kitout.txt a\n"
/* this too seems to be needed on wince - it appears to be related to the above */
"catch {rename source ::tcl::source}\n"
"proc source file {\n"
	"set old [info script]\n"
	"info script $file\n"
	"set fid [open $file]\n"
	"set data [read $fid]\n"
	"close $fid\n"
	"set code [catch {uplevel 1 $data} res]\n"
	"info script $old\n"
	"if {$code == 2} { set code 0 }\n"
	"return -code $code $res\n"
"}\n"
#endif /* _WIN32_WCE && !TCLKIT_DLL */
"proc tclKitInit {} {\n"
	"rename tclKitInit {}\n"
	"catch { load {} vfs }\n"
#ifdef KIT_INCLUDES_ZLIB
	"catch { load {} zlib }\n"
#endif
#ifdef KIT_INCLUDES_MK4TCL
	"catch { load {} Mk4tcl }\n"
#endif
#ifdef TCLKIT_DLL
	"load {} tclkit::init\n"
	"::tclkit::init::initInterp\n"
	"rename ::tclkit::init::initInterp {}\n"
#endif /* TCLKIT_DLL */
	"set bootfile [file join " TCLKIT_MOUNTPOINT " boot.tcl]\n"
	"if {[file exists $bootfile]} {\n"
		"catch {\n"
			"set f [open $bootfile]\n"
			"set s [read $f]\n"
			"close $f\n"
		"}\n"
	"} else {\n"
		"set ::TCLKIT_INITVFS 1\n"
	"}\n"
#ifdef KIT_STORAGE_MK4
	"set ::tclKitStorage \"mk4\"\n"
	"if {![info exists s]} {\n"
		"mk::file open exe " TCLKIT_VFSSOURCE " -readonly\n"
		"set n [mk::select exe.dirs!0.files name boot.tcl]\n"
		"if {$n != \"\"} {\n"
			"set s [mk::get exe.dirs!0.files!$n contents]\n"
			"if {![string length $s]} { error \"empty boot.tcl\" }\n"
			"catch {load {} zlib}\n"
			"if {[mk::get exe.dirs!0.files!$n size] != [string length $s]} {\n"
				"set s [zlib decompress $s]\n"
			"}\n"
		"}\n"
	"}\n"
#endif /* KIT_STORAGE_MK4 */
#ifdef KIT_STORAGE_ZIP
	"set ::tclKitStorage \"zip\"\n"











	"if {![info exists s]} {\n"
#  include "zipvfs.tcl.h"
		"catch {\n"
			"set ::tclKitStorage_fd [::zip::open " TCLKIT_VFSSOURCE "]\n"
			"::zip::stat $::tclKitStorage_fd boot.tcl sb\n"
			"seek $::tclKitStorage_fd $sb(ino)\n"
			"::zip::Data $::tclKitStorage_fd sb s\n"
		"}\n"
	"}\n"
#endif /* KIT_STORAGE_ZIP */
#ifdef KIT_STORAGE_CVFS
	"set ::tclKitStorage \"cvfs\"\n"
	"load {} rechan\n"
	"load {} cvfs_data_tcl\n"
#include "cvfs.tcl.h"
	"if {![info exists s]} {\n"
		"catch {\n"
			"set s [::vfs::cvfs::data::getData tcl boot.tcl]\n"
		"}\n"
	"}\n"
#endif /* KIT_STORAGE_CVFS */
#ifndef TCLKIT_DLL
	"if {![info exists s]} {\n"
		"set f [open setup.tcl]\n"
		"set s [read $f]\n"
		"close $f\n"
	"}\n"
#endif /* !TCLKIT_DLL */
#ifdef TCLKIT_DLL
	"set ::TCLKIT_TYPE \"kitdll\"\n"
#else
	"set ::TCLKIT_TYPE \"tclkit\"\n"
#endif /* TCLKIT_DLL */
	"set ::TCLKIT_MOUNTPOINT " TCLKIT_MOUNTPOINT "\n"
	"set ::TCLKIT_VFSSOURCE " TCLKIT_VFSSOURCE "\n"
	"set ::TCLKIT_MOUNTPOINT_VAR {" TCLKIT_MOUNTPOINT "}\n"
	"set ::TCLKIT_VFSSOURCE_VAR {" TCLKIT_VFSSOURCE "}\n"
	"uplevel #0 $s\n"
#if defined(KIT_INCLUDES_TK) && defined(KIT_TK_VERSION)
	"package ifneeded Tk " KIT_TK_VERSION " {\n"
		"load {} Tk\n"
	"}\n"
#endif
#ifdef _WIN32

				return;
			}
		}
	}
#endif /* HAVE_READLINK */

#ifdef HAVE_ACCEPTABLE_DLADDR
#  ifndef TCLKIT_DLL
	if (Tcl_GetNameOfExecutable() == NULL) {
		dladdr_ret = dladdr(&SetExecName, &syminfo);
		if (dladdr_ret != 0) {
			SetExecName(interp, syminfo.dli_fname);

			return;
		}
	}
#  endif /* !TCLKIT_DLL */

#  ifdef KITSH_NEED_WINMAIN
	if (Tcl_GetNameOfExecutable() == NULL) {
#    ifdef _WIN32_WCE
		dladdr_ret = dladdr(&WinMain, &syminfo);
#    else
		dladdr_ret = dladdr(&wWinMain, &syminfo);
#    endif /* _WIN32_WCE */

		if (dladdr_ret != 0) {
			SetExecName(interp, syminfo.dli_fname);

			return;
		}
	}
#  endif /* KITSH_NEED_WINMAIN */

	if (Tcl_GetNameOfExecutable() == NULL) {
		dladdr_ret = dladdr(&main, &syminfo);
		if (dladdr_ret != 0) {
			SetExecName(interp, syminfo.dli_fname);

			return;
		}
	}
#endif /* HAVE_ACCEPTABLE_DLADDR */

	if (Tcl_GetNameOfExecutable() == NULL) {
		lobjv[0] = Tcl_GetVar2Ex(interp, "argv0", NULL, TCL_GLOBAL_ONLY);
		execNameObj = Tcl_FSJoinToPath(Tcl_FSGetCwd(interp), 1, lobjv);

		SetExecName(interp, Tcl_GetStringFromObj(execNameObj, &len));

		return;
	}

	return;
}












static void _Tclkit_Generic_Init(void) {
#ifdef KIT_INCLUDES_ITCL
	Tcl_StaticPackage(0, "Itcl", Itcl_Init, NULL);
#endif 
#ifdef KIT_INCLUDES_MK4TCL
	Tcl_StaticPackage(0, "Mk4tcl", Mk4tcl_Init, NULL);
#endif
#ifdef KIT_INCLUDES_PWB
	Tcl_StaticPackage(0, "pwb", Pwb_Init, NULL);
#endif 
	Tcl_StaticPackage(0, "rechan", Rechan_Init, NULL);
	Tcl_StaticPackage(0, "vfs", Vfs_Init, NULL);
#ifdef KIT_INCLUDES_ZLIB
	Tcl_StaticPackage(0, "zlib", Zlib_Init, NULL);
#endif
#ifdef KIT_STORAGE_CVFS
	Tcl_StaticPackage(0, "cvfs_data_tcl", Cvfs_data_tcl_Init, NULL);
#endif
#ifdef TCL_THREADS
	Tcl_StaticPackage(0, "Thread", Thread_Init, NULL);
#endif
#ifdef _WIN32
	Tcl_StaticPackage(0, "dde", Dde_Init, NULL);
	Tcl_StaticPackage(0, "registry", Registry_Init, NULL);
#endif
#ifdef KIT_INCLUDES_TK
	Tcl_StaticPackage(0, "Tk", Tk_Init, Tk_SafeInit);
#endif

	TclSetPreInitScript(preInitCmd);

	return;
}

static void _Tclkit_Interp_Init(Tcl_Interp *interp) {
#ifdef TCLKIT_CAN_SET_ENCODING
	Tcl_DString encodingName;
#endif /* TCLKIT_CAN_SET_ENCODING */

#ifndef TCLKIT_DLL
	/* the tcl_rcFileName variable only exists in the initial interpreter */
#  ifdef _WIN32
	Tcl_SetVar(interp, "tcl_rcFileName", "~/tclkitrc.tcl", TCL_GLOBAL_ONLY);
#  else
	Tcl_SetVar(interp, "tcl_rcFileName", "~/.tclkitrc", TCL_GLOBAL_ONLY);
#  endif /* _WIN32 */
#endif /* !TCLKIT_DLL */

#ifdef TCLKIT_CAN_SET_ENCODING
	/* Set the encoding from the Environment */
	Tcl_GetEncodingNameFromEnvironment(&encodingName);
	Tcl_SetSystemEncoding(NULL, Tcl_DStringValue(&encodingName));
	Tcl_SetVar(interp, "tclkit_system_encoding", Tcl_DStringValue(&encodingName), 0);
	Tcl_DStringFree(&encodingName);
#endif /* TCLKIT_CAN_SET_ENCODING */

	/* Hack to get around Tcl bug 1224888.  This must be run here and
	 * in LibraryPathObjCmd because this information is needed both
	 * before and after that command is run. */
	FindAndSetExecName(interp);

	return;
}

#ifndef TCLKIT_DLL
int TclKit_AppInit(Tcl_Interp *interp) {
#ifdef KIT_INCLUDES_TK
#  ifdef _WIN32
#    ifndef _WIN32_WCE
	char msgBuf[2049];
#    endif /* !_WIN32_WCE */
#  endif /* _WIN32 */
#endif /* KIT_INCLUDES_TK */

	/* Perform common initialization */
	_Tclkit_Generic_Init();

	_Tclkit_Interp_Init(interp);

	if (Tcl_Init(interp) == TCL_ERROR) {
		goto error;
	}

#ifdef KIT_INCLUDES_TK
#  ifdef _WIN32
	if (Tk_Init(interp) == TCL_ERROR) {

#    endif /* !_WIN32_WCE */
    /* we won't reach this, but we need the return */
#  endif /* _WIN32 */
#endif /* KIT_INCLUDES_TK */

	return TCL_ERROR;
}
#endif /* !TCLKIT_DLL */


#ifdef TCLKIT_DLL
#  ifdef HAVE_ACCEPTABLE_DLADDR
/* Symbol to resolve against dladdr() */
static void _tclkit_dummy_func(void) {
	return;
}
#  endif /* HAVE_ACCEPTABLE_DLADDR */

/*
 * This function will return a pathname we can open() to treat as a VFS,
 * hopefully
 */
static char *find_tclkit_dll_path(void) {
#ifdef HAVE_ACCEPTABLE_DLADDR
	Dl_info syminfo;
	int dladdr_ret;
#endif /* HAVE_ACCEPTABLE_DLADDR */
#ifdef _WIN32
	TCHAR modulename[8192];
	DWORD gmfn_ret;
#endif /* _WIN32 */

#ifdef HAVE_ACCEPTABLE_DLADDR
	dladdr_ret = dladdr(&_tclkit_dummy_func, &syminfo);
	if (dladdr_ret != 0) {
		if (syminfo.dli_fname && syminfo.dli_fname[0] != '\0') {
			return(strdup(syminfo.dli_fname));
		}
	}
#endif /* HAVE_ACCEPTABLE_DLADDR */

#ifdef _WIN32
	gmfn_ret = GetModuleFileName(TclWinGetTclInstance(), modulename, sizeof(modulename) / sizeof(modulename[0]) - 1);

	if (gmfn_ret != 0) {
		return(strdup(modulename));
	}
#endif /* _WIN32 */

	return(NULL);
}

/*
 * This function exists to allow C code to initialize a particular
 * interpreter.
 */
static int tclkit_init_initinterp(ClientData cd, Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[]) {
	char *kitdll_path;

	kitdll_path = find_tclkit_dll_path();
	if (kitdll_path != NULL) {
		Tcl_SetVar(interp, "tclKitFilename", kitdll_path, TCL_GLOBAL_ONLY);

		free(kitdll_path);
	}

	_Tclkit_Interp_Init(interp);

	return(TCL_OK);
}

/*
 * Create a package for initializing a particular interpreter.  This is
 * our hook to have Tcl invoke C commands when creating an interpreter.
 * The preInitCmd will load the package in the new interpreter and invoke
 * this function.
 */
int Tclkit_init_Init(Tcl_Interp *interp) {
	Tcl_Command tclCreatComm_ret;
	int tclPkgProv_ret;

	tclCreatComm_ret = Tcl_CreateObjCommand(interp, "::tclkit::init::initInterp", tclkit_init_initinterp, NULL, NULL);
	if (!tclCreatComm_ret) {
		return(TCL_ERROR);
	}

	tclPkgProv_ret = Tcl_PkgProvide(interp, "tclkit::init", "1.0");

	return(tclPkgProv_ret);
}

/*
 * Initialize the Tcl system when we are loaded, that way Tcl functions
 * are ready to be used when invoked.
 */
void __attribute__((constructor)) _Tclkit_Init(void) {
	Tcl_StaticPackage(0, "tclkit::init", Tclkit_init_Init, NULL);

	_Tclkit_Generic_Init();

	return;
}
#endif