/[dtapublic]/projs/trunk/shared_source/c_tcl_base_7_5_w_mods/tclinitscript.h
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Revision 29 - (show annotations) (download)
Sat Oct 8 07:08:47 2016 UTC (7 years, 4 months ago) by dashley
Original Path: to_be_filed/sf_code/esrgpcpj/shared/tcl_base/tclinitscript.h
File MIME type: text/plain
File size: 3762 byte(s)
Directories relocated.
1 /* $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 */

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