- eliminate some unnessary type casts

- some internal const decorations
- spacing

8 files changed, 76 insertions, 66 deletions

diff --git a/ChangeLog b/ChangeLog
index b6f8800..56a77f9 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -12,6 +12,13 @@
 	* win/tclWinPipe.c
 	* win/tclWinReg.c
 	* win/tclWinTest.c
+	* generic/tclBasic.c
+	* generic/tclBinary.c
+	* generic/tclCmdAH.c
+	* generic/tclCmdIL.c
+	* generic/tclCmdMZ.c
+	* generic/tclCompCmds.c
+	* generic/tclDictObj.c
 
 2009-02-03  Donal K. Fellows  <dkf@users.sf.net>
 
diff --git a/generic/tclBasic.c b/generic/tclBasic.c
index 0cd1196..b1a8d35 100644
--- a/generic/tclBasic.c
+++ b/generic/tclBasic.c
@@ -16,7 +16,7 @@
  * See the file "license.terms" for information on usage and redistribution of
  * this file, and for a DISCLAIMER OF ALL WARRANTIES.
  *
- * RCS: @(#) $Id: tclBasic.c,v 1.384 2009/01/28 16:28:32 dkf Exp $
+ * RCS: @(#) $Id: tclBasic.c,v 1.385 2009/02/03 23:34:33 nijtmans Exp $
  */
 
 #include "tclInt.h"
@@ -4141,7 +4141,7 @@ TclNREvalObjv(
     }
 
     if (TCL_DTRACE_CMD_ARGS_ENABLED()) {
-	char *a[10];
+	const char *a[10];
 	int i = 0;
 
 	while (i < 10) {
@@ -4460,7 +4460,7 @@ TEOV_Error(
 {
     Interp *iPtr = (Interp *) interp;
     Tcl_Obj *listPtr;
-    char *cmdString;
+    const char *cmdString;
     int cmdLen;
     int objc = PTR2INT(data[0]);
     Tcl_Obj **objv = data[1];
@@ -4590,7 +4590,7 @@ TEOV_RunEnterTraces(
     int traceCode = TCL_OK;
     int cmdEpoch = cmdPtr->cmdEpoch;
     int newEpoch;
-    char *command;
+    const char *command;
     int length;
     Tcl_Obj *commandPtr;
 
@@ -4648,7 +4648,7 @@ TEOV_RunLeaveTraces(
     int result)
 {
     Interp *iPtr = (Interp *) interp;
-    char *command;
+    const char *command;
     int length, objc;
     Tcl_Obj **objv;
     int traceCode = PTR2INT(data[0]);
@@ -5862,7 +5862,7 @@ TclNREvalObjEx(
 	 * in the bytecode compiler.
 	 */
 
-	char *script;
+	const char *script;
 	int numSrcBytes;
 
 	Tcl_IncrRefCount(objPtr);
@@ -5953,7 +5953,7 @@ TEOEx_ByteCodeCallback(
 	    result = TclUpdateReturnInfo(iPtr);
 	}
 	if ((result != TCL_OK) && (result != TCL_ERROR) && !allowExceptions) {
-	    char *script;
+	    const char *script;
 	    int numSrcBytes;
 
 	    ProcessUnexpectedResult(interp, result);
@@ -6363,7 +6363,7 @@ TclObjInvoke(
 {
     register Interp *iPtr = (Interp *) interp;
     Tcl_HashTable *hTblPtr;	/* Table of hidden commands. */
-    char *cmdName;		/* Name of the command from objv[0]. */
+    const char *cmdName;	/* Name of the command from objv[0]. */
     Tcl_HashEntry *hPtr = NULL;
     Command *cmdPtr;
     int result;
@@ -7844,7 +7844,7 @@ Tcl_NRCallObjProc(
     TEOV_callback *rootPtr = TOP_CB(interp);
 
     if (TCL_DTRACE_CMD_ARGS_ENABLED()) {
-	char *a[10];
+	const char *a[10];
 	int i = 0;
 
 	while (i < 10) {
@@ -8399,7 +8399,7 @@ TclNRCoroutineObjCmd(
     Tcl_Obj *cmdObjPtr;
     CallFrame *framePtr, **framePtrPtr;
     TEOV_callback *rootPtr = TOP_CB(interp);
-    char *fullName;
+    const char *fullName;
     const char *procName;
     Namespace *nsPtr, *altNsPtr, *cxtNsPtr;
     Tcl_DString ds;
diff --git a/generic/tclBinary.c b/generic/tclBinary.c
index 6802c10..68409d1 100644
--- a/generic/tclBinary.c
+++ b/generic/tclBinary.c
@@ -10,7 +10,7 @@
  * See the file "license.terms" for information on usage and redistribution of
  * this file, and for a DISCLAIMER OF ALL WARRANTIES.
  *
- * RCS: @(#) $Id: tclBinary.c,v 1.53 2009/01/09 11:21:45 dkf Exp $
+ * RCS: @(#) $Id: tclBinary.c,v 1.54 2009/02/03 23:34:32 nijtmans Exp $
  */
 
 #include "tclInt.h"
@@ -61,7 +61,7 @@ static void		DupByteArrayInternalRep(Tcl_Obj *srcPtr,
 static int		FormatNumber(Tcl_Interp *interp, int type,
 			    Tcl_Obj *src, unsigned char **cursorPtr);
 static void		FreeByteArrayInternalRep(Tcl_Obj *objPtr);
-static int		GetFormatSpec(char **formatPtr, char *cmdPtr,
+static int		GetFormatSpec(const char **formatPtr, char *cmdPtr,
 			    int *countPtr, int *flagsPtr);
 static Tcl_Obj *	ScanNumber(unsigned char *buffer, int type,
 			    int flags, Tcl_HashTable **numberCachePtr);
@@ -425,7 +425,7 @@ SetByteArrayFromAny(
     Tcl_Obj *objPtr)		/* The object to convert to type ByteArray. */
 {
     int length;
-    char *src, *srcEnd;
+    const char *src, *srcEnd;
     unsigned char *dst;
     ByteArray *byteArrayPtr;
     Tcl_UniChar ch;
@@ -651,7 +651,7 @@ BinaryFormatCmd(
     int count;			/* Count associated with current format
 				 * character. */
     int flags;			/* Format field flags */
-    char *format;		/* Pointer to current position in format
+    const char *format;	/* Pointer to current position in format
 				 * string. */
     Tcl_Obj *resultPtr = NULL;	/* Object holding result buffer. */
     unsigned char *buffer;	/* Start of result buffer. */
@@ -659,7 +659,7 @@ BinaryFormatCmd(
     unsigned char *maxPos;	/* Greatest position within result buffer that
 				 * cursor has visited.*/
     const char *errorString;
-    char *errorValue, *str;
+    const char *errorValue, *str;
     int offset, size, length;
 
     if (objc < 2) {
@@ -1155,13 +1155,13 @@ BinaryScanCmd(
     int count;			/* Count associated with current format
 				 * character. */
     int flags;			/* Format field flags */
-    char *format;		/* Pointer to current position in format
+    const char *format;	/* Pointer to current position in format
 				 * string. */
     Tcl_Obj *resultPtr = NULL;	/* Object holding result buffer. */
     unsigned char *buffer;	/* Start of result buffer. */
     unsigned char *cursor;	/* Current position within result buffer. */
     const char *errorString;
-    char *str;
+    const char *str;
     int offset, size, length;
 
     int i;
@@ -1520,7 +1520,7 @@ BinaryScanCmd(
 
 static int
 GetFormatSpec(
-    char **formatPtr,		/* Pointer to format string. */
+    const char **formatPtr,	/* Pointer to format string. */
     char *cmdPtr,		/* Pointer to location of command char. */
     int *countPtr,		/* Pointer to repeat count value. */
     int *flagsPtr)		/* Pointer to field flags */
@@ -1555,7 +1555,7 @@ GetFormatSpec(
 	(*formatPtr)++;
 	*countPtr = BINARY_ALL;
     } else if (isdigit(UCHAR(**formatPtr))) { /* INTL: digit */
-	*countPtr = strtoul(*formatPtr, formatPtr, 10);
+	*countPtr = strtoul(*formatPtr, (char **) formatPtr, 10);
     } else {
 	*countPtr = BINARY_NOCOUNT;
     }
diff --git a/generic/tclCmdAH.c b/generic/tclCmdAH.c
index 988f21f..c8829f8 100644
--- a/generic/tclCmdAH.c
+++ b/generic/tclCmdAH.c
@@ -10,7 +10,7 @@
  * See the file "license.terms" for information on usage and redistribution of
  * this file, and for a DISCLAIMER OF ALL WARRANTIES.
  *
- * RCS: @(#) $Id: tclCmdAH.c,v 1.114 2009/01/04 22:57:39 dkf Exp $
+ * RCS: @(#) $Id: tclCmdAH.c,v 1.115 2009/02/03 23:34:33 nijtmans Exp $
  */
 
 #include "tclInt.h"
@@ -126,7 +126,7 @@ Tcl_CaseObjCmd(
 {
     register int i;
     int body, result, caseObjc;
-    char *stringPtr, *arg;
+    const char *stringPtr, *arg;
     Tcl_Obj *const *caseObjv;
     Tcl_Obj *armPtr;
 
@@ -163,7 +163,7 @@ Tcl_CaseObjCmd(
     for (i = 0;  i < caseObjc;  i += 2) {
 	int patObjc, j;
 	const char **patObjv;
-	char *pat;
+	const char *pat;
 	unsigned char *p;
 
 	if (i == caseObjc-1) {
@@ -514,7 +514,7 @@ Tcl_EncodingObjCmd(
 	Tcl_DString ds;
 	Tcl_Encoding encoding;
 	int length;
-	char *stringPtr;
+	const char *stringPtr;
 
 	if (objc == 3) {
 	    encoding = Tcl_GetEncoding(interp, NULL);
diff --git a/generic/tclCmdIL.c b/generic/tclCmdIL.c
index 8dc4c12..be62444 100644
--- a/generic/tclCmdIL.c
+++ b/generic/tclCmdIL.c
@@ -16,7 +16,7 @@
  * See the file "license.terms" for information on usage and redistribution of
  * this file, and for a DISCLAIMER OF ALL WARRANTIES.
  *
- * RCS: @(#) $Id: tclCmdIL.c,v 1.164 2009/01/09 11:21:45 dkf Exp $
+ * RCS: @(#) $Id: tclCmdIL.c,v 1.165 2009/02/03 23:34:32 nijtmans Exp $
  */
 
 #include "tclInt.h"
@@ -30,7 +30,7 @@
 
 typedef struct SortElement {
     union {
-	char *strValuePtr;
+	const char *strValuePtr;
 	long intValue;
 	double doubleValue;
 	Tcl_Obj *objValuePtr;
@@ -103,7 +103,7 @@ typedef struct SortInfo {
  * Forward declarations for procedures defined in this file:
  */
 
-static int		DictionaryCompare(char *left, char *right);
+static int		DictionaryCompare(const char *left, const char *right);
 static int		InfoArgsCmd(ClientData dummy, Tcl_Interp *interp,
 			    int objc, Tcl_Obj *const objv[]);
 static int		InfoBodyCmd(ClientData dummy, Tcl_Interp *interp,
@@ -223,7 +223,7 @@ TclNRIfObjCmd(
 				 * check. */
     Interp *iPtr = (Interp *) interp;
     int i, result, value;
-    char *clause;
+    const char *clause;
 
     i = 1;
     while (1) {
@@ -431,7 +431,7 @@ InfoArgsCmd(
     Tcl_Obj *const objv[])	/* Argument objects. */
 {
     register Interp *iPtr = (Interp *) interp;
-    char *name;
+    const char *name;
     Proc *procPtr;
     CompiledLocal *localPtr;
     Tcl_Obj *listObjPtr;
@@ -492,7 +492,7 @@ InfoBodyCmd(
     Tcl_Obj *const objv[])	/* Argument objects. */
 {
     register Interp *iPtr = (Interp *) interp;
-    char *name;
+    const char *name;
     Proc *procPtr;
     Tcl_Obj *bodyPtr, *resultPtr;
 
@@ -602,7 +602,7 @@ InfoCommandsCmd(
     int objc,			/* Number of arguments. */
     Tcl_Obj *const objv[])	/* Argument objects. */
 {
-    char *cmdName, *pattern;
+    const char *cmdName, *pattern;
     const char *simplePattern;
     register Tcl_HashEntry *entryPtr;
     Tcl_HashSearch search;
@@ -917,7 +917,7 @@ InfoDefaultCmd(
     Tcl_Obj *const objv[])	/* Argument objects. */
 {
     Interp *iPtr = (Interp *) interp;
-    char *procName, *argName, *varName;
+    const char *procName, *argName, *varName;
     Proc *procPtr;
     CompiledLocal *localPtr;
     Tcl_Obj *valueObjPtr;
@@ -998,7 +998,7 @@ TclInfoExistsCmd(
     int objc,			/* Number of arguments. */
     Tcl_Obj *const objv[])	/* Argument objects. */
 {
-    char *varName;
+    const char *varName;
     Var *varPtr;
 
     if (objc != 2) {
@@ -1357,7 +1357,7 @@ InfoFunctionsCmd(
     int objc,			/* Number of arguments. */
     Tcl_Obj *const objv[])	/* Argument objects. */
 {
-    char *pattern;
+    const char *pattern;
 
     if (objc == 1) {
 	pattern = NULL;
@@ -1558,7 +1558,7 @@ InfoLoadedCmd(
     int objc,			/* Number of arguments. */
     Tcl_Obj *const objv[])	/* Argument objects. */
 {
-    char *interpName;
+    const char *interpName;
     int result;
 
     if ((objc != 1) && (objc != 2)) {
@@ -1686,7 +1686,7 @@ InfoProcsCmd(
     int objc,			/* Number of arguments. */
     Tcl_Obj *const objv[])	/* Argument objects. */
 {
-    char *cmdName, *pattern;
+    const char *cmdName, *pattern;
     const char *simplePattern;
     Namespace *nsPtr;
 #ifdef INFO_PROCS_SEARCH_GLOBAL_NS
@@ -2750,7 +2750,7 @@ Tcl_LsearchObjCmd(
     int objc,			/* Number of arguments. */
     Tcl_Obj *const objv[])	/* Argument values. */
 {
-    char *bytes, *patternBytes;
+    const char *bytes, *patternBytes;
     int i, match, index, result, listc, length, elemLen, bisect;
     int dataType, isIncreasing, lower, upper, patInt, objInt, offset;
     int allMatches, inlineReturn, negatedMatch, returnSubindices, noCase;
@@ -4194,7 +4194,7 @@ SortCompare(
 
 static int
 DictionaryCompare(
-    char *left, char *right)	/* The strings to compare. */
+    const char *left, const char *right)	/* The strings to compare. */
 {
     Tcl_UniChar uniLeft, uniRight, uniLeftLower, uniRightLower;
     int diff, zeros;
diff --git a/generic/tclCmdMZ.c b/generic/tclCmdMZ.c
index 7cb14b5..22de674 100644
--- a/generic/tclCmdMZ.c
+++ b/generic/tclCmdMZ.c
@@ -15,7 +15,7 @@
  * See the file "license.terms" for information on usage and redistribution of
  * this file, and for a DISCLAIMER OF ALL WARRANTIES.
  *
- * RCS: @(#) $Id: tclCmdMZ.c,v 1.176 2009/01/13 20:30:03 dkf Exp $
+ * RCS: @(#) $Id: tclCmdMZ.c,v 1.177 2009/02/03 23:34:32 nijtmans Exp $
  */
 
 #include "tclInt.h"
@@ -121,7 +121,7 @@ Tcl_RegexpObjCmd(
     doinline = 0;
 
     for (i = 1; i < objc; i++) {
-	char *name;
+	const char *name;
 	int index;
 
 	name = TclGetString(objv[i]);
@@ -470,7 +470,7 @@ Tcl_RegsubObjCmd(
     resultPtr = NULL;
 
     for (idx = 1; idx < objc; idx++) {
-	char *name;
+	const char *name;
 	int index;
 
 	name = TclGetString(objv[idx]);
@@ -855,7 +855,7 @@ Tcl_RenameObjCmd(
     int objc,			/* Number of arguments. */
     Tcl_Obj *const objv[])	/* Argument objects. */
 {
-    char *oldName, *newName;
+    const char *oldName, *newName;
 
     if (objc != 3) {
 	Tcl_WrongNumArgs(interp, 1, objv, "oldName newName");
@@ -1001,7 +1001,8 @@ Tcl_SplitObjCmd(
     Tcl_UniChar ch;
     int len;
     const char *splitChars;
-    char *stringPtr, *end;
+    const char *stringPtr;
+    const char *end;
     int splitCharLen, stringLen;
     Tcl_Obj *listPtr, *objPtr;
 
@@ -2458,7 +2459,7 @@ StringEqualCmd(
      * the expr string comparison in INST_EQ/INST_NEQ/INST_LT/...).
      */
 
-    char *string1, *string2;
+    const char *string1, *string2;
     int length1, length2, i, match, length, nocase = 0, reqlength = -1;
     typedef int (*strCmpFn_t)(const char *, const char *, unsigned int);
     strCmpFn_t strCmpFn;
@@ -2605,7 +2606,7 @@ StringCmpCmd(
      * the expr string comparison in INST_EQ/INST_NEQ/INST_LT/...).
      */
 
-    char *string1, *string2;
+    const char *string1, *string2;
     int length1, length2, i, match, length, nocase = 0, reqlength = -1;
     typedef int (*strCmpFn_t)(const char *, const char *, unsigned int);
     strCmpFn_t strCmpFn;
@@ -2829,7 +2830,8 @@ StringLowerCmd(
     Tcl_Obj *const objv[])	/* Argument objects. */
 {
     int length1, length2;
-    char *string1, *string2;
+    const char *string1;
+    char *string2;
 
     if (objc < 2 || objc > 4) {
 	Tcl_WrongNumArgs(interp, 1, objv, "string ?first? ?last?");
@@ -2913,7 +2915,8 @@ StringUpperCmd(
     Tcl_Obj *const objv[])	/* Argument objects. */
 {
     int length1, length2;
-    char *string1, *string2;
+    const char *string1;
+    char *string2;
 
     if (objc < 2 || objc > 4) {
 	Tcl_WrongNumArgs(interp, 1, objv, "string ?first? ?last?");
@@ -2997,7 +3000,8 @@ StringTitleCmd(
     Tcl_Obj *const objv[])	/* Argument objects. */
 {
     int length1, length2;
-    char *string1, *string2;
+    const char *string1;
+    char *string2;
 
     if (objc < 2 || objc > 4) {
 	Tcl_WrongNumArgs(interp, 1, objv, "string ?first? ?last?");
@@ -3454,7 +3458,7 @@ Tcl_SwitchObjCmd(
 {
     int i,j, index, mode, foundmode, result, splitObjs, numMatchesSaved;
     int noCase, patternLength;
-    char *pattern;
+    const char *pattern;
     Tcl_Obj *stringObj, *indexVarObj, *matchVarObj;
     Tcl_Obj *const *savedObjv = objv;
     Tcl_RegExp regExpr = NULL;
@@ -4085,7 +4089,7 @@ Tcl_TryObjCmd(
     int objc,			/* Number of arguments. */
     Tcl_Obj *const objv[])	/* Argument objects. */
 {
-    return Tcl_NRCallObjProc(interp, TclNRTryObjCmd, dummy, objc, objv);    
+    return Tcl_NRCallObjProc(interp, TclNRTryObjCmd, dummy, objc, objv);
 }
 
 int
@@ -4095,7 +4099,7 @@ TclNRTryObjCmd(
     int objc,			/* Number of arguments. */
     Tcl_Obj *const objv[])	/* Argument objects. */
 {
-    
+
 }
 #endif /* not yet implemented */
 
@@ -4127,7 +4131,7 @@ Tcl_WhileObjCmd(
     int objc,			/* Number of arguments. */
     Tcl_Obj *const objv[])	/* Argument objects. */
 {
-    return Tcl_NRCallObjProc(interp, TclNRWhileObjCmd, dummy, objc, objv);    
+    return Tcl_NRCallObjProc(interp, TclNRWhileObjCmd, dummy, objc, objv);
 }
 
 int
diff --git a/generic/tclCompCmds.c b/generic/tclCompCmds.c
index 5d8e31a..8403a98 100644
--- a/generic/tclCompCmds.c
+++ b/generic/tclCompCmds.c
@@ -12,7 +12,7 @@
  * See the file "license.terms" for information on usage and redistribution of
  * this file, and for a DISCLAIMER OF ALL WARRANTIES.
  *
- * RCS: @(#) $Id: tclCompCmds.c,v 1.151 2009/01/09 11:21:45 dkf Exp $
+ * RCS: @(#) $Id: tclCompCmds.c,v 1.152 2009/02/03 23:34:32 nijtmans Exp $
  */
 
 #include "tclInt.h"
@@ -3107,7 +3107,7 @@ TclCompileRegexpCmd(
     Tcl_Token *varTokenPtr;	/* Pointer to the Tcl_Token representing the
 				 * parse of the RE or string. */
     int i, len, nocase, exact, sawLast, simple;
-    char *str;
+    const char *str;
     DefineLineInformation;	/* TIP #280 */
 
     /*
@@ -3141,7 +3141,7 @@ TclCompileRegexpCmd(
 
 	    return TCL_ERROR;
 	}
-	str = (char *) varTokenPtr[1].start;
+	str = varTokenPtr[1].start;
 	len = varTokenPtr[1].size;
 	if ((len == 2) && (str[0] == '-') && (str[1] == '-')) {
 	    sawLast++;
@@ -3177,7 +3177,7 @@ TclCompileRegexpCmd(
     if (varTokenPtr->type == TCL_TOKEN_SIMPLE_WORD) {
 	Tcl_DString ds;
 
-	str = (char *) varTokenPtr[1].start;
+	str = varTokenPtr[1].start;
 	len = varTokenPtr[1].size;
 	/*
 	 * If it has a '-', it could be an incorrectly formed regexp command.
diff --git a/generic/tclDictObj.c b/generic/tclDictObj.c
index c800441..ef0ebe9 100644
--- a/generic/tclDictObj.c
+++ b/generic/tclDictObj.c
@@ -9,7 +9,7 @@
  * See the file "license.terms" for information on usage and redistribution of
  * this file, and for a DISCLAIMER OF ALL WARRANTIES.
  *
- * RCS: @(#) $Id: tclDictObj.c,v 1.76 2009/01/28 16:28:32 dkf Exp $
+ * RCS: @(#) $Id: tclDictObj.c,v 1.77 2009/02/03 23:34:32 nijtmans Exp $
  */
 
 #include "tclInt.h"
@@ -473,7 +473,8 @@ UpdateStringOfDict(
     ChainEntry *cPtr;
     Tcl_Obj *keyPtr, *valuePtr;
     int numElems, i, length;
-    char *elem, *dst;
+    const char *elem;
+    char *dst;
 
     /*
      * This field is the most useful one in the whole hash structure, and it
@@ -564,10 +565,11 @@ SetDictFromAny(
     Tcl_Interp *interp,
     Tcl_Obj *objPtr)
 {
-    char *string, *s;
+    const char *string;
+    char *s;
     const char *elemStart, *nextElem;
     int lenRemain, length, elemSize, hasBrace, result, isNew;
-    char *limit;		/* Points just after string's last byte. */
+    const char *limit;	/* Points just after string's last byte. */
     register const char *p;
     register Tcl_Obj *keyPtr, *valuePtr;
     Dict *dict;
@@ -1835,7 +1837,7 @@ DictKeysCmd(
     Tcl_Obj *const *objv)
 {
     Tcl_Obj *listPtr;
-    char *pattern = NULL;
+    const char *pattern = NULL;
 
     if (objc!=2 && objc!=3) {
 	Tcl_WrongNumArgs(interp, 1, objv, "dictionary ?pattern?");
@@ -1920,7 +1922,7 @@ DictValuesCmd(
     Tcl_Obj *valuePtr = NULL, *listPtr;
     Tcl_DictSearch search;
     int done;
-    char *pattern;
+    const char *pattern;
 
     if (objc!=2 && objc!=3) {
 	Tcl_WrongNumArgs(interp, 1, objv, "dictionary ?pattern?");
@@ -2067,7 +2069,6 @@ DictInfoCmd(
 {
     Tcl_Obj *dictPtr;
     Dict *dict;
-    char *buf;
 
     if (objc != 2) {
 	Tcl_WrongNumArgs(interp, 1, objv, "dictionary");
@@ -2083,9 +2084,7 @@ DictInfoCmd(
     }
     dict = dictPtr->internalRep.otherValuePtr;
 
-    buf = Tcl_HashStats(&dict->table);
-    Tcl_SetObjResult(interp, Tcl_NewStringObj(buf, -1));
-    ckfree(buf);
+    Tcl_SetResult(interp, Tcl_HashStats(&dict->table), TCL_DYNAMIC);
     return TCL_OK;
 }
 
@@ -2720,7 +2719,7 @@ DictFilterCmd(
     Tcl_Obj **varv, *keyObj = NULL, *valueObj = NULL, *resultObj, *boolObj;
     Tcl_DictSearch search;
     int index, varc, done, result, satisfied;
-    char *pattern;
+    const char *pattern;
 
     if (objc < 3) {
 	Tcl_WrongNumArgs(interp, 1, objv, "dictionary filterType ?arg ...?");