|
sl@0
|
1 |
/*
|
|
sl@0
|
2 |
* tclInitScript.h --
|
|
sl@0
|
3 |
*
|
|
sl@0
|
4 |
* This file contains Unix & Windows common init script
|
|
sl@0
|
5 |
* It is not used on the Mac. (the mac init script is in tclMacInit.c)
|
|
sl@0
|
6 |
*
|
|
sl@0
|
7 |
* Copyright (c) 1998 Sun Microsystems, Inc.
|
|
sl@0
|
8 |
* Copyright (c) 1999 by Scriptics Corporation.
|
|
sl@0
|
9 |
* All rights reserved.
|
|
sl@0
|
10 |
*
|
|
sl@0
|
11 |
* RCS: @(#) $Id: tclInitScript.h,v 1.13 2001/09/10 21:06:55 dgp Exp $
|
|
sl@0
|
12 |
*/
|
|
sl@0
|
13 |
|
|
sl@0
|
14 |
/*
|
|
sl@0
|
15 |
* In order to find init.tcl during initialization, the following script
|
|
sl@0
|
16 |
* is invoked by Tcl_Init(). It looks in several different directories:
|
|
sl@0
|
17 |
*
|
|
sl@0
|
18 |
* $tcl_library - can specify a primary location, if set
|
|
sl@0
|
19 |
* no other locations will be checked
|
|
sl@0
|
20 |
*
|
|
sl@0
|
21 |
* $env(TCL_LIBRARY) - highest priority so user can always override
|
|
sl@0
|
22 |
* the search path unless the application has
|
|
sl@0
|
23 |
* specified an exact directory above
|
|
sl@0
|
24 |
*
|
|
sl@0
|
25 |
* $tclDefaultLibrary - this value is initialized by TclPlatformInit
|
|
sl@0
|
26 |
* from a static C variable that was set at
|
|
sl@0
|
27 |
* compile time
|
|
sl@0
|
28 |
*
|
|
sl@0
|
29 |
* $tcl_libPath - this value is initialized by a call to
|
|
sl@0
|
30 |
* TclGetLibraryPath called from Tcl_Init.
|
|
sl@0
|
31 |
*
|
|
sl@0
|
32 |
* The first directory on this path that contains a valid init.tcl script
|
|
sl@0
|
33 |
* will be set as the value of tcl_library.
|
|
sl@0
|
34 |
*
|
|
sl@0
|
35 |
* Note that this entire search mechanism can be bypassed by defining an
|
|
sl@0
|
36 |
* alternate tclInit procedure before calling Tcl_Init().
|
|
sl@0
|
37 |
*/
|
|
sl@0
|
38 |
|
|
sl@0
|
39 |
static char initScript[] = "if {[info proc tclInit]==\"\"} {\n\
|
|
sl@0
|
40 |
proc tclInit {} {\n\
|
|
sl@0
|
41 |
global tcl_libPath tcl_library errorInfo\n\
|
|
sl@0
|
42 |
global env tclDefaultLibrary\n\
|
|
sl@0
|
43 |
rename tclInit {}\n\
|
|
sl@0
|
44 |
set errors {}\n\
|
|
sl@0
|
45 |
set dirs {}\n\
|
|
sl@0
|
46 |
if {[info exists tcl_library]} {\n\
|
|
sl@0
|
47 |
lappend dirs $tcl_library\n\
|
|
sl@0
|
48 |
} else {\n\
|
|
sl@0
|
49 |
if {[info exists env(TCL_LIBRARY)]} {\n\
|
|
sl@0
|
50 |
lappend dirs $env(TCL_LIBRARY)\n\
|
|
sl@0
|
51 |
}\n\
|
|
sl@0
|
52 |
catch {\n\
|
|
sl@0
|
53 |
lappend dirs $tclDefaultLibrary\n\
|
|
sl@0
|
54 |
unset tclDefaultLibrary\n\
|
|
sl@0
|
55 |
}\n\
|
|
sl@0
|
56 |
set dirs [concat $dirs $tcl_libPath]\n\
|
|
sl@0
|
57 |
}\n\
|
|
sl@0
|
58 |
foreach i $dirs {\n\
|
|
sl@0
|
59 |
set tcl_library $i\n\
|
|
sl@0
|
60 |
set tclfile [file join $i init.tcl]\n\
|
|
sl@0
|
61 |
if {[file exists $tclfile]} {\n\
|
|
sl@0
|
62 |
if {![catch {uplevel #0 [list source $tclfile]} msg]} {\n\
|
|
sl@0
|
63 |
return\n\
|
|
sl@0
|
64 |
} else {\n\
|
|
sl@0
|
65 |
append errors \"$tclfile: $msg\n$errorInfo\n\"\n\
|
|
sl@0
|
66 |
}\n\
|
|
sl@0
|
67 |
}\n\
|
|
sl@0
|
68 |
}\n\
|
|
sl@0
|
69 |
set msg \"Can't find a usable init.tcl in the following directories: \n\"\n\
|
|
sl@0
|
70 |
append msg \" $dirs\n\n\"\n\
|
|
sl@0
|
71 |
append msg \"$errors\n\n\"\n\
|
|
sl@0
|
72 |
append msg \"This probably means that Tcl wasn't installed properly.\n\"\n\
|
|
sl@0
|
73 |
error $msg\n\
|
|
sl@0
|
74 |
}\n\
|
|
sl@0
|
75 |
}\n\
|
|
sl@0
|
76 |
tclInit";
|
|
sl@0
|
77 |
|
|
sl@0
|
78 |
|
|
sl@0
|
79 |
/*
|
|
sl@0
|
80 |
* A pointer to a string that holds an initialization script that if non-NULL
|
|
sl@0
|
81 |
* is evaluated in Tcl_Init() prior to the the built-in initialization script
|
|
sl@0
|
82 |
* above. This variable can be modified by the procedure below.
|
|
sl@0
|
83 |
*/
|
|
sl@0
|
84 |
|
|
sl@0
|
85 |
static char * tclPreInitScript = NULL;
|
|
sl@0
|
86 |
|
|
sl@0
|
87 |
|
|
sl@0
|
88 |
/*
|
|
sl@0
|
89 |
*----------------------------------------------------------------------
|
|
sl@0
|
90 |
*
|
|
sl@0
|
91 |
* TclSetPreInitScript --
|
|
sl@0
|
92 |
*
|
|
sl@0
|
93 |
* This routine is used to change the value of the internal
|
|
sl@0
|
94 |
* variable, tclPreInitScript.
|
|
sl@0
|
95 |
*
|
|
sl@0
|
96 |
* Results:
|
|
sl@0
|
97 |
* Returns the current value of tclPreInitScript.
|
|
sl@0
|
98 |
*
|
|
sl@0
|
99 |
* Side effects:
|
|
sl@0
|
100 |
* Changes the way Tcl_Init() routine behaves.
|
|
sl@0
|
101 |
*
|
|
sl@0
|
102 |
*----------------------------------------------------------------------
|
|
sl@0
|
103 |
*/
|
|
sl@0
|
104 |
|
|
sl@0
|
105 |
char *
|
|
sl@0
|
106 |
TclSetPreInitScript (string)
|
|
sl@0
|
107 |
char *string; /* Pointer to a script. */
|
|
sl@0
|
108 |
{
|
|
sl@0
|
109 |
char *prevString = tclPreInitScript;
|
|
sl@0
|
110 |
tclPreInitScript = string;
|
|
sl@0
|
111 |
return(prevString);
|
|
sl@0
|
112 |
}
|