211 lines
6.1 KiB
C
211 lines
6.1 KiB
C
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/*
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* tclGet.c --
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*
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* This file contains procedures to convert strings into
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* other forms, like integers or floating-point numbers or
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* booleans, doing syntax checking along the way.
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*
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* Copyright (c) 1990-1993 The Regents of the University of California.
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* All rights reserved.
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*
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* Permission is hereby granted, without written agreement and without
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* license or royalty fees, to use, copy, modify, and distribute this
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* software and its documentation for any purpose, provided that the
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* above copyright notice and the following two paragraphs appear in
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* all copies of this software.
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*
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* IN NO EVENT SHALL THE UNIVERSITY OF CALIFORNIA BE LIABLE TO ANY PARTY FOR
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* DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING OUT
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* OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF THE UNIVERSITY OF
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* CALIFORNIA HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* THE UNIVERSITY OF CALIFORNIA SPECIFICALLY DISCLAIMS ANY WARRANTIES,
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* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
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* AND FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
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* ON AN "AS IS" BASIS, AND THE UNIVERSITY OF CALIFORNIA HAS NO OBLIGATION TO
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* PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
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*/
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#ifndef lint
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static char rcsid[] = "$Header: /user6/ouster/tcl/RCS/tclGet.c,v 1.14 93/08/18 16:07:24 ouster Exp $ SPRITE (Berkeley)";
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#endif /* not lint */
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#include "tclInt.h"
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/*
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*----------------------------------------------------------------------
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*
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* Tcl_GetInt --
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*
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* Given a string, produce the corresponding integer value.
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*
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* Results:
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* The return value is normally TCL_OK; in this case *intPtr
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* will be set to the integer value equivalent to string. If
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* string is improperly formed then TCL_ERROR is returned and
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* an error message will be left in interp->result.
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*
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* Side effects:
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* None.
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*
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*----------------------------------------------------------------------
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*/
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int
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Tcl_GetInt(interp, string, intPtr)
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Tcl_Interp *interp; /* Interpreter to use for error reporting. */
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char *string; /* String containing a (possibly signed)
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* integer in a form acceptable to strtol. */
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int *intPtr; /* Place to store converted result. */
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{
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char *end, *p;
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int i;
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/*
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* Note: use strtoul instead of strtol for integer conversions
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* to allow full-size unsigned numbers, but don't depend on strtoul
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* to handle sign characters; it won't in some implementations.
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*/
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for (p = string; isspace(UCHAR(*p)); p++) {
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/* Empty loop body. */
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}
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if (*p == '-') {
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i = -strtoul(p+1, &end, 0);
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} else if (*p == '+') {
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i = strtoul(p+1, &end, 0);
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} else {
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i = strtoul(p, &end, 0);
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}
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while ((*end != '\0') && isspace(UCHAR(*end))) {
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end++;
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}
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if ((end == string) || (*end != 0)) {
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Tcl_AppendResult(interp, "expected integer but got \"", string,
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"\"", (char *) NULL);
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return TCL_ERROR;
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}
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*intPtr = i;
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return TCL_OK;
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}
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/*
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*----------------------------------------------------------------------
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*
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* Tcl_GetDouble --
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*
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* Given a string, produce the corresponding double-precision
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* floating-point value.
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*
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* Results:
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* The return value is normally TCL_OK; in this case *doublePtr
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* will be set to the double-precision value equivalent to string.
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* If string is improperly formed then TCL_ERROR is returned and
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* an error message will be left in interp->result.
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*
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* Side effects:
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* None.
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*
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*----------------------------------------------------------------------
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*/
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int
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Tcl_GetDouble(interp, string, doublePtr)
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Tcl_Interp *interp; /* Interpreter to use for error reporting. */
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char *string; /* String containing a floating-point number
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* in a form acceptable to strtod. */
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double *doublePtr; /* Place to store converted result. */
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{
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char *end;
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double d;
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d = strtod(string, &end);
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while ((*end != '\0') && isspace(UCHAR(*end))) {
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end++;
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}
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if ((end == string) || (*end != 0)) {
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Tcl_AppendResult(interp, "expected floating-point number but got \"",
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string, "\"", (char *) NULL);
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return TCL_ERROR;
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}
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*doublePtr = d;
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return TCL_OK;
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}
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/*
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*----------------------------------------------------------------------
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*
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* Tcl_GetBoolean --
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*
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* Given a string, return a 0/1 boolean value corresponding
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* to the string.
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*
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* Results:
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* The return value is normally TCL_OK; in this case *boolPtr
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* will be set to the 0/1 value equivalent to string. If
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* string is improperly formed then TCL_ERROR is returned and
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* an error message will be left in interp->result.
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*
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* Side effects:
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* None.
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*
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*----------------------------------------------------------------------
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*/
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int
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Tcl_GetBoolean(interp, string, boolPtr)
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Tcl_Interp *interp; /* Interpreter to use for error reporting. */
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char *string; /* String containing a boolean number
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* specified either as 1/0 or true/false or
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* yes/no. */
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int *boolPtr; /* Place to store converted result, which
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* will be 0 or 1. */
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{
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char c;
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char lowerCase[10];
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int i, length;
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/*
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* Convert the input string to all lower-case.
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*/
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for (i = 0; i < 9; i++) {
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c = string[i];
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if (c == 0) {
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break;
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}
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if ((c >= 'A') && (c <= 'Z')) {
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c += 'a' - 'A';
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}
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lowerCase[i] = c;
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}
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lowerCase[i] = 0;
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length = strlen(lowerCase);
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c = lowerCase[0];
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if ((c == '0') && (lowerCase[1] == '\0')) {
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*boolPtr = 0;
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} else if ((c == '1') && (lowerCase[1] == '\0')) {
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*boolPtr = 1;
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} else if ((c == 'y') && (strncmp(lowerCase, "yes", length) == 0)) {
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*boolPtr = 1;
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} else if ((c == 'n') && (strncmp(lowerCase, "no", length) == 0)) {
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*boolPtr = 0;
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} else if ((c == 't') && (strncmp(lowerCase, "true", length) == 0)) {
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*boolPtr = 1;
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} else if ((c == 'f') && (strncmp(lowerCase, "false", length) == 0)) {
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*boolPtr = 0;
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} else if ((c == 'o') && (length >= 2)) {
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if (strncmp(lowerCase, "on", length) == 0) {
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*boolPtr = 1;
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} else if (strncmp(lowerCase, "off", length) == 0) {
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*boolPtr = 0;
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}
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} else {
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Tcl_AppendResult(interp, "expected boolean value but got \"",
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string, "\"", (char *) NULL);
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return TCL_ERROR;
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}
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return TCL_OK;
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}
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