shared_source/c_tcl_base_7_5_w_mods/tclinitscript.h

/* $Header: /cvsroot/esrg/sfesrg/esrgpcpj/shared/tcl_base/tclinitscript.h,v 1.1.1.1 2001/06/13 04:39:33 dtashley Exp $ */

/* 
 * 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);
}


/* $History: tclinitscript.h $
 * 
 * *****************  Version 1  *****************
 * User: Dtashley     Date: 1/02/01    Time: 1:29a
 * Created in $/IjuScripter, IjuConsole/Source/Tcl Base
 * Initial check-in.
 */ 

/* End of TCLINITSCRIPT.H */
1	dashley	25	/* $Header: /cvsroot/esrg/sfesrg/esrgpcpj/shared/tcl_base/tclinitscript.h,v 1.1.1.1 2001/06/13 04:39:33 dtashley Exp $ */
2
3			/*
4			* tclInitScript.h --
5			*
6			* This file contains Unix & Windows common init script
7			* It is not used on the Mac. (the mac init script is in tclMacInit.c)
8			*
9			* Copyright (c) 1998 Sun Microsystems, Inc.
10			* Copyright (c) 1999 by Scriptics Corporation.
11			* All rights reserved.
12			*
13			* RCS: @(#) $Id: tclinitscript.h,v 1.1.1.1 2001/06/13 04:39:33 dtashley Exp $
14			*/
15
16			/*
17			* In order to find init.tcl during initialization, the following script
18			* is invoked by Tcl_Init(). It looks in several different directories:
19			*
20			* $tcl_library - can specify a primary location, if set
21			* no other locations will be checked
22			*
23			* $env(TCL_LIBRARY) - highest priority so user can always override
24			* the search path unless the application has
25			* specified an exact directory above
26			*
27			* $tclDefaultLibrary - this value is initialized by TclPlatformInit
28			* from a static C variable that was set at
29			* compile time
30			*
31			* $tcl_libPath - this value is initialized by a call to
32			* TclGetLibraryPath called from Tcl_Init.
33			*
34			* The first directory on this path that contains a valid init.tcl script
35			* will be set as the value of tcl_library.
36			*
37			* Note that this entire search mechanism can be bypassed by defining an
38			* alternate tclInit procedure before calling Tcl_Init().
39			*/
40
41			static char initScript[] = "if {[info proc tclInit]==\"\"} {\n\
42			proc tclInit {} {\n\
43			global tcl_libPath tcl_library errorInfo\n\
44			global env tclDefaultLibrary\n\
45			rename tclInit {}\n\
46			set errors {}\n\
47			set dirs {}\n\
48			if {[info exists tcl_library]} {\n\
49			lappend dirs $tcl_library\n\
50			} else {\n\
51			if {[info exists env(TCL_LIBRARY)]} {\n\
52			lappend dirs $env(TCL_LIBRARY)\n\
53			}\n\
54			lappend dirs $tclDefaultLibrary\n\
55			unset tclDefaultLibrary\n\
56			set dirs [concat $dirs $tcl_libPath]\n\
57			}\n\
58			foreach i $dirs {\n\
59			set tcl_library $i\n\
60			set tclfile [file join $i init.tcl]\n\
61			if {[file exists $tclfile]} {\n\
62			if {![catch {uplevel #0 [list source $tclfile]} msg]} {\n\
63			return\n\
64			} else {\n\
65			append errors \"$tclfile: $msg\n$errorInfo\n\"\n\
66			}\n\
67			}\n\
68			}\n\
69			set msg \"Can't find a usable init.tcl in the following directories: \n\"\n\
70			append msg \" $dirs\n\n\"\n\
71			append msg \"$errors\n\n\"\n\
72			append msg \"This probably means that Tcl wasn't installed properly.\n\"\n\
73			error $msg\n\
74			}\n\
75			}\n\
76			tclInit";
77
78
79			/*
80			* A pointer to a string that holds an initialization script that if non-NULL
81			* is evaluated in Tcl_Init() prior to the the built-in initialization script
82			* above. This variable can be modified by the procedure below.
83			*/
84
85			static char * tclPreInitScript = NULL;
86
87
88			/*
89			*----------------------------------------------------------------------
90			*
91			* TclSetPreInitScript --
92			*
93			* This routine is used to change the value of the internal
94			* variable, tclPreInitScript.
95			*
96			* Results:
97			* Returns the current value of tclPreInitScript.
98			*
99			* Side effects:
100			* Changes the way Tcl_Init() routine behaves.
101			*
102			*----------------------------------------------------------------------
103			*/
104
105			char *
106			TclSetPreInitScript (string)
107			char string; / Pointer to a script. */
108			{
109			char *prevString = tclPreInitScript;
110			tclPreInitScript = string;
111			return(prevString);
112			}
113
114
115			/* $History: tclinitscript.h $
116			*
117			* *************** Version 1 ***************
118			* User: Dtashley Date: 1/02/01 Time: 1:29a
119			* Created in $/IjuScripter, IjuConsole/Source/Tcl Base
120			* Initial check-in.
121			*/
122
123			/* End of TCLINITSCRIPT.H */