shared_source/c_tcl_base_7_5_w_mods/tclinitscript.h

/* $Header$ */
/* 
 * tclInitScript.h --
 *
 *      This file contains Unix & Windows common init script
 *      It is not used on the Mac. (the mac init script is in tclMacInit.c)
 *
 * Copyright (c) 1998 Sun Microsystems, Inc.
 * Copyright (c) 1999 by Scriptics Corporation.
 * All rights reserved.
 *
 * RCS: @(#) $Id: tclinitscript.h,v 1.1.1.1 2001/06/13 04:39:33 dtashley Exp $
 */

/*
 * In order to find init.tcl during initialization, the following script
 * is invoked by Tcl_Init().  It looks in several different directories:
 *
 *      $tcl_library            - can specify a primary location, if set
 *                                no other locations will be checked
 *
 *      $env(TCL_LIBRARY)       - highest priority so user can always override
 *                                the search path unless the application has
 *                                specified an exact directory above
 *
 *      $tclDefaultLibrary      - this value is initialized by TclPlatformInit
 *                                from a static C variable that was set at
 *                                compile time
 *
 *      $tcl_libPath            - this value is initialized by a call to
 *                                TclGetLibraryPath called from Tcl_Init.
 *
 * The first directory on this path that contains a valid init.tcl script
 * will be set as the value of tcl_library.
 *
 * Note that this entire search mechanism can be bypassed by defining an
 * alternate tclInit procedure before calling Tcl_Init().
 */

static char initScript[] = "if {[info proc tclInit]==\"\"} {\n\
  proc tclInit {} {\n\
    global tcl_libPath tcl_library errorInfo\n\
    global env tclDefaultLibrary\n\
    rename tclInit {}\n\
    set errors {}\n\
    set dirs {}\n\
    if {[info exists tcl_library]} {\n\
        lappend dirs $tcl_library\n\
    } else {\n\
        if {[info exists env(TCL_LIBRARY)]} {\n\
            lappend dirs $env(TCL_LIBRARY)\n\
        }\n\
        lappend dirs $tclDefaultLibrary\n\
        unset tclDefaultLibrary\n\
        set dirs [concat $dirs $tcl_libPath]\n\
    }\n\
    foreach i $dirs {\n\
        set tcl_library $i\n\
        set tclfile [file join $i init.tcl]\n\
        if {[file exists $tclfile]} {\n\
            if {![catch {uplevel #0 [list source $tclfile]} msg]} {\n\
                return\n\
            } else {\n\
                append errors \"$tclfile: $msg\n$errorInfo\n\"\n\
            }\n\
        }\n\
    }\n\
    set msg \"Can't find a usable init.tcl in the following directories: \n\"\n\
    append msg \"    $dirs\n\n\"\n\
    append msg \"$errors\n\n\"\n\
    append msg \"This probably means that Tcl wasn't installed properly.\n\"\n\
    error $msg\n\
  }\n\
}\n\
tclInit";


/*
 * A pointer to a string that holds an initialization script that if non-NULL
 * is evaluated in Tcl_Init() prior to the the built-in initialization script
 * above.  This variable can be modified by the procedure below.
 */
 
static char *          tclPreInitScript = NULL;


/*
 *----------------------------------------------------------------------
 *
 * TclSetPreInitScript --
 *
 *      This routine is used to change the value of the internal
 *      variable, tclPreInitScript.
 *
 * Results:
 *      Returns the current value of tclPreInitScript.
 *
 * Side effects:
 *      Changes the way Tcl_Init() routine behaves.
 *
 *----------------------------------------------------------------------
 */

char *
TclSetPreInitScript (string)
    char *string;               /* Pointer to a script. */
{
    char *prevString = tclPreInitScript;
    tclPreInitScript = string;
    return(prevString);
}

/* End of tclinitscript.h */
1	dashley	71	/* $Header$ */
2			/*
3			* tclInitScript.h --
4			*
5			* This file contains Unix & Windows common init script
6			* It is not used on the Mac. (the mac init script is in tclMacInit.c)
7			*
8			* Copyright (c) 1998 Sun Microsystems, Inc.
9			* Copyright (c) 1999 by Scriptics Corporation.
10			* All rights reserved.
11			*
12			* RCS: @(#) $Id: tclinitscript.h,v 1.1.1.1 2001/06/13 04:39:33 dtashley Exp $
13			*/
14
15			/*
16			* In order to find init.tcl during initialization, the following script
17			* is invoked by Tcl_Init(). It looks in several different directories:
18			*
19			* $tcl_library - can specify a primary location, if set
20			* no other locations will be checked
21			*
22			* $env(TCL_LIBRARY) - highest priority so user can always override
23			* the search path unless the application has
24			* specified an exact directory above
25			*
26			* $tclDefaultLibrary - this value is initialized by TclPlatformInit
27			* from a static C variable that was set at
28			* compile time
29			*
30			* $tcl_libPath - this value is initialized by a call to
31			* TclGetLibraryPath called from Tcl_Init.
32			*
33			* The first directory on this path that contains a valid init.tcl script
34			* will be set as the value of tcl_library.
35			*
36			* Note that this entire search mechanism can be bypassed by defining an
37			* alternate tclInit procedure before calling Tcl_Init().
38			*/
39
40			static char initScript[] = "if {[info proc tclInit]==\"\"} {\n\
41			proc tclInit {} {\n\
42			global tcl_libPath tcl_library errorInfo\n\
43			global env tclDefaultLibrary\n\
44			rename tclInit {}\n\
45			set errors {}\n\
46			set dirs {}\n\
47			if {[info exists tcl_library]} {\n\
48			lappend dirs $tcl_library\n\
49			} else {\n\
50			if {[info exists env(TCL_LIBRARY)]} {\n\
51			lappend dirs $env(TCL_LIBRARY)\n\
52			}\n\
53			lappend dirs $tclDefaultLibrary\n\
54			unset tclDefaultLibrary\n\
55			set dirs [concat $dirs $tcl_libPath]\n\
56			}\n\
57			foreach i $dirs {\n\
58			set tcl_library $i\n\
59			set tclfile [file join $i init.tcl]\n\
60			if {[file exists $tclfile]} {\n\
61			if {![catch {uplevel #0 [list source $tclfile]} msg]} {\n\
62			return\n\
63			} else {\n\
64			append errors \"$tclfile: $msg\n$errorInfo\n\"\n\
65			}\n\
66			}\n\
67			}\n\
68			set msg \"Can't find a usable init.tcl in the following directories: \n\"\n\
69			append msg \" $dirs\n\n\"\n\
70			append msg \"$errors\n\n\"\n\
71			append msg \"This probably means that Tcl wasn't installed properly.\n\"\n\
72			error $msg\n\
73			}\n\
74			}\n\
75			tclInit";
76
77
78			/*
79			* A pointer to a string that holds an initialization script that if non-NULL
80			* is evaluated in Tcl_Init() prior to the the built-in initialization script
81			* above. This variable can be modified by the procedure below.
82			*/
83
84			static char * tclPreInitScript = NULL;
85
86
87			/*
88			*----------------------------------------------------------------------
89			*
90			* TclSetPreInitScript --
91			*
92			* This routine is used to change the value of the internal
93			* variable, tclPreInitScript.
94			*
95			* Results:
96			* Returns the current value of tclPreInitScript.
97			*
98			* Side effects:
99			* Changes the way Tcl_Init() routine behaves.
100			*
101			*----------------------------------------------------------------------
102			*/
103
104			char *
105			TclSetPreInitScript (string)
106			char string; / Pointer to a script. */
107			{
108			char *prevString = tclPreInitScript;
109			tclPreInitScript = string;
110			return(prevString);
111			}
112
113			/* End of tclinitscript.h */