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/* $Header: /cvsroot/esrg/sfesrg/esrgpcpj/shared/tcl_base/tclinitscript.h,v 1.1.1.1 2001/06/13 04:39:33 dtashley Exp $ */
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/*
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* tclInitScript.h --
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*
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* This file contains Unix & Windows common init script
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* It is not used on the Mac. (the mac init script is in tclMacInit.c)
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*
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* Copyright (c) 1998 Sun Microsystems, Inc.
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* Copyright (c) 1999 by Scriptics Corporation.
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* All rights reserved.
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*
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* RCS: @(#) $Id: tclinitscript.h,v 1.1.1.1 2001/06/13 04:39:33 dtashley Exp $
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*/
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/*
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* In order to find init.tcl during initialization, the following script
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* is invoked by Tcl_Init(). It looks in several different directories:
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*
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* $tcl_library - can specify a primary location, if set
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* no other locations will be checked
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*
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* $env(TCL_LIBRARY) - highest priority so user can always override
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* the search path unless the application has
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* specified an exact directory above
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*
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* $tclDefaultLibrary - this value is initialized by TclPlatformInit
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* from a static C variable that was set at
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* compile time
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*
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* $tcl_libPath - this value is initialized by a call to
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* TclGetLibraryPath called from Tcl_Init.
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*
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* The first directory on this path that contains a valid init.tcl script
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* will be set as the value of tcl_library.
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*
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* Note that this entire search mechanism can be bypassed by defining an
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* alternate tclInit procedure before calling Tcl_Init().
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*/
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static char initScript[] = "if {[info proc tclInit]==\"\"} {\n\
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proc tclInit {} {\n\
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global tcl_libPath tcl_library errorInfo\n\
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global env tclDefaultLibrary\n\
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rename tclInit {}\n\
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set errors {}\n\
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set dirs {}\n\
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if {[info exists tcl_library]} {\n\
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lappend dirs $tcl_library\n\
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} else {\n\
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if {[info exists env(TCL_LIBRARY)]} {\n\
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lappend dirs $env(TCL_LIBRARY)\n\
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}\n\
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lappend dirs $tclDefaultLibrary\n\
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unset tclDefaultLibrary\n\
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set dirs [concat $dirs $tcl_libPath]\n\
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}\n\
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foreach i $dirs {\n\
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set tcl_library $i\n\
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set tclfile [file join $i init.tcl]\n\
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if {[file exists $tclfile]} {\n\
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if {![catch {uplevel #0 [list source $tclfile]} msg]} {\n\
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return\n\
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} else {\n\
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append errors \"$tclfile: $msg\n$errorInfo\n\"\n\
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}\n\
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}\n\
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}\n\
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set msg \"Can't find a usable init.tcl in the following directories: \n\"\n\
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append msg \" $dirs\n\n\"\n\
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append msg \"$errors\n\n\"\n\
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append msg \"This probably means that Tcl wasn't installed properly.\n\"\n\
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error $msg\n\
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}\n\
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}\n\
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tclInit";
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/*
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* A pointer to a string that holds an initialization script that if non-NULL
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* is evaluated in Tcl_Init() prior to the the built-in initialization script
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* above. This variable can be modified by the procedure below.
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*/
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static char * tclPreInitScript = NULL;
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/*
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*----------------------------------------------------------------------
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*
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* TclSetPreInitScript --
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*
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* This routine is used to change the value of the internal
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* variable, tclPreInitScript.
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*
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* Results:
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* Returns the current value of tclPreInitScript.
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*
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* Side effects:
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* Changes the way Tcl_Init() routine behaves.
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*
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*----------------------------------------------------------------------
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*/
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char *
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TclSetPreInitScript (string)
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char *string; /* Pointer to a script. */
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{
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char *prevString = tclPreInitScript;
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tclPreInitScript = string;
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return(prevString);
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}
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/* $History: tclinitscript.h $
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*
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* ***************** Version 1 *****************
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* User: Dtashley Date: 1/02/01 Time: 1:29a
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* Created in $/IjuScripter, IjuConsole/Source/Tcl Base
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* Initial check-in.
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*/
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/* End of TCLINITSCRIPT.H */ |
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