/* 
 * tclAppInit.c --
 *
 *	Provides a default version of the main program and Tcl_AppInit
 *	procedure for Tcl applications (without Tk).  Note that this
 *	program must be built in Win32 console mode to work properly.
 *
 * Copyright (c) 1996 by Sun Microsystems, Inc.
 *
 * See the file "license.terms" for information on usage and redistribution
 * of this file, and for a DISCLAIMER OF ALL WARRANTIES.
 *
 * SCCS: @(#) tclAppInit.c 1.7 96/07/23 16:18:08
 */

#include "tcl.h"
#include "generic/dp.h"
#include <windows.h>
#include <locale.h>

#ifdef TCL_TEST
EXTERN int		TclTest_Init _ANSI_ARGS_((Tcl_Interp *interp));
#endif /* TCL_TEST */

EXTERN int		Dp_Init	_ANSI_ARGS_((Tcl_Interp *interp));


/*
 *----------------------------------------------------------------------
 *
 * main --
 *
 *	This is the main program for the application.
 *
 * Results:
 *	None: Tcl_Main never returns here, so this procedure never
 *	returns either.
 *
 * Side effects:
 *	Whatever the application does.
 *
 *----------------------------------------------------------------------
 */

int
main(argc, argv)
    int argc;			/* Number of command-line arguments. */
    char **argv;		/* Values of command-line arguments. */
{
    char *args = GetCommandLine();
    char **argvlist, *p;
    int size, i;

    /*
     * Set up the default locale to be standard "C" locale so parsing
     * is performed correctly.
     */

    setlocale(LC_ALL, "C");

    /*
     * Precompute an overly pessimistic guess at the number of arguments
     * in the command line by counting non-space spans.
     */

    for (size = 2, p = args; *p != '\0'; p++) {
	if (isspace(*p)) {
	    size++;
	    while (isspace(*p)) {
		p++;
	    }
	    if (*p == '\0') {
		break;
	    }
	}
    }
    argvlist = (char **) ckalloc((unsigned) (size * sizeof(char *)));
    argv = argvlist;

    /*
     * Parse the Windows command line string.  If an argument begins with a
     * double quote, then spaces are considered part of the argument until the
     * next double quote.  The argument terminates at the second quote.  Note
     * that this is different from the usual Unix semantics.
     */

    for (i = 0, p = args; *p != '\0'; i++) {
	while (isspace(*p)) {
	    p++;
	}
	if (*p == '\0') {
	    break;
	}
	if (*p == '"') {
	    p++;
	    argv[i] = p;
	    while ((*p != '\0') && (*p != '"')) {
		p++;
	    }
	} else {
	    argv[i] = p;
	    while (*p != '\0' && !isspace(*p)) {
		p++;
	    }
	}
	if (*p != '\0') {
	    *p = '\0';
	    p++;
	}
    }
    argv[i] = NULL;
    argc = i;

    Tcl_Main(argc, argv, Tcl_AppInit);
    return 0;			/* Needed only to prevent compiler warning. */
}


/*
 *----------------------------------------------------------------------
 *
 * Tcl_AppInit --
 *
 *	This procedure performs application-specific initialization.
 *	Most applications, especially those that incorporate additional
 *	packages, will have their own version of this procedure.
 *
 * Results:
 *	Returns a standard Tcl completion code, and leaves an error
 *	message in interp->result if an error occurs.
 *
 * Side effects:
 *	Depends on the startup script.
 *
 *----------------------------------------------------------------------
 */

int
Tcl_AppInit(interp)
    Tcl_Interp *interp;		/* Interpreter for application. */
{
    if (Tcl_Init(interp) == TCL_ERROR) {
	return TCL_ERROR;
    }
    if (Dp_Init(interp) == TCL_ERROR) {
	return TCL_ERROR;
    }

    /*
     * Call the init procedures for included packages.  Each call should
     * look like this:
     *
     * if (Mod_Init(interp) == TCL_ERROR) {
     *     return TCL_ERROR;
     * }
     *
     * where "Mod" is the name of the module.
     */

    /*
     * Call Tcl_CreateCommand for application-specific commands, if
     * they weren't already created by the init procedures called above.
     */

    /*
     * Specify a user-specific startup file to invoke if the application
     * is run interactively.  Typically the startup file is "~/.apprc"
     * where "app" is the name of the application.  If this line is deleted
     * then no user-specific startup file will be run under any conditions.
     */

    Tcl_SetVar(interp, "tcl_rcFileName", "~/tclsh.rc", TCL_GLOBAL_ONLY);
    return TCL_OK;
}