Symaptic: os/persistentdata/persistentstorage/sqlite3api/TEST/TCL/tcldistribution/generic/tclInitScript.h@260cb5ec6c19

     1 /*

     2  * tclInitScript.h --

     3  *

     4  *	This file contains Unix & Windows common init script

     5  *      It is not used on the Mac. (the mac init script is in tclMacInit.c)

     6  *

     7  * Copyright (c) 1998 Sun Microsystems, Inc.

     8  * Copyright (c) 1999 by Scriptics Corporation.

     9  * All rights reserved.

    10  *

    11  * RCS: @(#) $Id: tclInitScript.h,v 1.13 2001/09/10 21:06:55 dgp Exp $

    12  */

    14 /*

    15  * In order to find init.tcl during initialization, the following script

    16  * is invoked by Tcl_Init().  It looks in several different directories:

    17  *

    18  *	$tcl_library		- can specify a primary location, if set

    19  *				  no other locations will be checked

    20  *

    21  *	$env(TCL_LIBRARY)	- highest priority so user can always override

    22  *				  the search path unless the application has

    23  *				  specified an exact directory above

    24  *

    25  *	$tclDefaultLibrary	- this value is initialized by TclPlatformInit

    26  *				  from a static C variable that was set at

    27  *				  compile time

    28  *

    29  *	$tcl_libPath		- this value is initialized by a call to

    30  *				  TclGetLibraryPath called from Tcl_Init.

    31  *

    32  * The first directory on this path that contains a valid init.tcl script

    33  * will be set as the value of tcl_library.

    34  *

    35  * Note that this entire search mechanism can be bypassed by defining an

    36  * alternate tclInit procedure before calling Tcl_Init().

    37  */

    39 static char initScript[] = "if {[info proc tclInit]==\"\"} {\n\

    40   proc tclInit {} {\n\

    41     global tcl_libPath tcl_library errorInfo\n\

    42     global env tclDefaultLibrary\n\

    43     rename tclInit {}\n\

    44     set errors {}\n\

    45     set dirs {}\n\

    46     if {[info exists tcl_library]} {\n\

    47 	lappend dirs $tcl_library\n\

    48     } else {\n\

    49 	if {[info exists env(TCL_LIBRARY)]} {\n\

    50 	    lappend dirs $env(TCL_LIBRARY)\n\

    51 	}\n\

    52 	catch {\n\

    53 	    lappend dirs $tclDefaultLibrary\n\

    54 	    unset tclDefaultLibrary\n\

    55 	}\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";

    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  */

    85 static char *          tclPreInitScript = NULL;

    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  */

   105 char *

   106 TclSetPreInitScript (string)

   107     char *string;		/* Pointer to a script. */

   108 {

   109     char *prevString = tclPreInitScript;

   110     tclPreInitScript = string;

   111     return(prevString);

   112 }

author	sl
	Tue, 10 Jun 2014 14:32:02 +0200
changeset 1	260cb5ec6c19
permissions	-rw-r--r--