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+/*
+ * tclInt.h --
+ *
+ *	Declarations of things used internally by the Tcl interpreter.
+ *
+ * Copyright (c) 1987-1993 The Regents of the University of California.
+ * Copyright (c) 1994-1997 Sun Microsystems, Inc.
+ * Copyright (c) 1993-1997 Lucent Technologies.
+ *
+ * See the file "license.terms" for information on usage and redistribution
+ * of this file, and for a DISCLAIMER OF ALL WARRANTIES.
+ *
+ *SCCS: @(#) tclInt.h 1.293 97/08/12 17:07:02
+ */
+
+#ifndef _TCLINT
+#define _TCLINT
+
+/*
+ * Common include files needed by most of the Tcl source files are
+ * included here, so that system-dependent personalizations for the
+ * include files only have to be made in once place.  This results
+ * in a few extra includes, but greater modularity.  The order of
+ * the three groups of #includes is important.  For example, stdio.h
+ * is needed by tcl.h, and the _ANSI_ARGS_ declaration in tcl.h is
+ * needed by stdlib.h in some configurations.
+ */
+
+#include <stdio.h>
+
+#ifndef _TCL
+#include "tcl.h"
+#endif
+#ifndef _REGEXP
+#include "tclRegexp.h"
+#endif
+
+#include <ctype.h>
+#ifdef NO_LIMITS_H
+#   include "../compat/limits.h"
+#else
+#   include <limits.h>
+#endif
+#ifdef NO_STDLIB_H
+#   include "../compat/stdlib.h"
+#else
+#   include <stdlib.h>
+#endif
+#ifdef NO_STRING_H
+#include "../compat/string.h"
+#else
+#include <string.h>
+#endif
+#if defined(__STDC__) || defined(HAS_STDARG)
+#   include <stdarg.h>
+#else
+#   include <varargs.h>
+#endif
+
+/*
+ *----------------------------------------------------------------
+ * Data structures related to namespaces.
+ *----------------------------------------------------------------
+ */
+
+/*
+ * The structure below defines a namespace.
+ * Note: the first five fields must match exactly the fields in a
+ * Tcl_Namespace structure (see tcl.h). If you change one, be sure to
+ * change the other.
+ */
+
+typedef struct Namespace {
+    char *name;			 /* The namespace's simple (unqualified)
+				  * name. This contains no ::'s. The name of
+				  * the global namespace is "" although "::"
+				  * is an synonym. */
+    char *fullName;		 /* The namespace's fully qualified name.
+				  * This starts with ::. */
+    ClientData clientData;	 /* An arbitrary value associated with this
+				  * namespace. */
+    Tcl_NamespaceDeleteProc *deleteProc;
+				 /* Procedure invoked when deleting the
+				  * namespace to, e.g., free clientData. */
+    struct Namespace *parentPtr; /* Points to the namespace that contains
+				  * this one. NULL if this is the global
+				  * namespace. */
+    Tcl_HashTable childTable;	 /* Contains any child namespaces. Indexed
+                                  * by strings; values have type
+				  * (Namespace *). */
+    long nsId;			 /* Unique id for the namespace. */
+    Tcl_Interp *interp;		 /* The interpreter containing this
+				  * namespace. */
+    int flags;			 /* OR-ed combination of the namespace
+				  * status flags NS_DYING and NS_DEAD
+				  * listed below. */
+    int activationCount;	 /* Number of "activations" or active call
+				  * frames for this namespace that are on
+				  * the Tcl call stack. The namespace won't
+				  * be freed until activationCount becomes
+				  * zero. */
+    int refCount;		 /* Count of references by namespaceName *
+				  * objects. The namespace can't be freed
+				  * until refCount becomes zero. */
+    Tcl_HashTable cmdTable;	 /* Contains all the commands currently
+                                  * registered in the namespace. Indexed by
+                                  * strings; values have type (Command *).
+				  * Commands imported by Tcl_Import have
+				  * Command structures that point (via an
+				  * ImportedCmdRef structure) to the
+				  * Command structure in the source
+				  * namespace's command table. */
+    Tcl_HashTable varTable;	 /* Contains all the (global) variables
+				  * currently in this namespace. Indexed
+                                  * by strings; values have type (Var *). */
+    char **exportArrayPtr;	 /* Points to an array of string patterns
+				  * specifying which commands are exported.
+				  * A pattern may include "string match"
+				  * style wildcard characters to specify
+				  * multiple commands; however, no namespace
+				  * qualifiers are allowed. NULL if no
+				  * export patterns are registered. */
+    int numExportPatterns;	 /* Number of export patterns currently
+				  * registered using "namespace export". */
+    int maxExportPatterns;	 /* Mumber of export patterns for which
+				  * space is currently allocated. */
+    int cmdRefEpoch;		 /* Incremented if a newly added command
+				  * shadows a command for which this
+				  * namespace has already cached a Command *
+				  * pointer; this causes all its cached
+				  * Command* pointers to be invalidated. */
+} Namespace;
+
+/*
+ * Flags used to represent the status of a namespace:
+ *
+ * NS_DYING -	1 means Tcl_DeleteNamespace has been called to delete the
+ *		namespace but there are still active call frames on the Tcl
+ *		stack that refer to the namespace. When the last call frame
+ *		referring to it has been popped, it's variables and command
+ *		will be destroyed and it will be marked "dead" (NS_DEAD).
+ *		The namespace can no longer be looked up by name.
+ * NS_DEAD -	1 means Tcl_DeleteNamespace has been called to delete the
+ *		namespace and no call frames still refer to it. Its
+ *		variables and command have already been destroyed. This bit
+ *		allows the namespace resolution code to recognize that the
+ *		namespace is "deleted". When the last namespaceName object
+ *		in any byte code code unit that refers to the namespace has
+ *		been freed (i.e., when the namespace's refCount is 0), the
+ *		namespace's storage will be freed.
+ */
+
+#define NS_DYING  	0x01
+#define NS_DEAD  	0x02
+
+/*
+ * Flag passed to TclGetNamespaceForQualName to have it create all namespace
+ * components of a namespace-qualified name that cannot be found. The new
+ * namespaces are created within their specified parent. Note that this
+ * flag's value must not conflict with the values of the flags
+ * TCL_GLOBAL_ONLY, TCL_NAMESPACE_ONLY, and FIND_ONLY_NS (defined in
+ * tclNamesp.c).
+ */
+
+#define CREATE_NS_IF_UNKNOWN 0x800
+
+/*
+ *----------------------------------------------------------------
+ * Data structures related to variables.   These are used primarily
+ * in tclVar.c
+ *----------------------------------------------------------------
+ */
+
+/*
+ * The following structure defines a variable trace, which is used to
+ * invoke a specific C procedure whenever certain operations are performed
+ * on a variable.
+ */
+
+typedef struct VarTrace {
+    Tcl_VarTraceProc *traceProc;/* Procedure to call when operations given
+				 * by flags are performed on variable. */
+    ClientData clientData;	/* Argument to pass to proc. */
+    int flags;			/* What events the trace procedure is
+				 * interested in:  OR-ed combination of
+				 * TCL_TRACE_READS, TCL_TRACE_WRITES, and
+				 * TCL_TRACE_UNSETS. */
+    struct VarTrace *nextPtr;	/* Next in list of traces associated with
+				 * a particular variable. */
+} VarTrace;
+
+/*
+ * When a variable trace is active (i.e. its associated procedure is
+ * executing), one of the following structures is linked into a list
+ * associated with the variable's interpreter.  The information in
+ * the structure is needed in order for Tcl to behave reasonably
+ * if traces are deleted while traces are active.
+ */
+
+typedef struct ActiveVarTrace {
+    struct Var *varPtr;		/* Variable that's being traced. */
+    struct ActiveVarTrace *nextPtr;
+				/* Next in list of all active variable
+				 * traces for the interpreter, or NULL
+				 * if no more. */
+    VarTrace *nextTracePtr;	/* Next trace to check after current
+				 * trace procedure returns;  if this
+				 * trace gets deleted, must update pointer
+				 * to avoid using free'd memory. */
+} ActiveVarTrace;
+
+/*
+ * The following structure describes an enumerative search in progress on
+ * an array variable;  this are invoked with options to the "array"
+ * command.
+ */
+
+typedef struct ArraySearch {
+    int id;			/* Integer id used to distinguish among
+				 * multiple concurrent searches for the
+				 * same array. */
+    struct Var *varPtr;		/* Pointer to array variable that's being
+				 * searched. */
+    Tcl_HashSearch search;	/* Info kept by the hash module about
+				 * progress through the array. */
+    Tcl_HashEntry *nextEntry;	/* Non-null means this is the next element
+			 	 * to be enumerated (it's leftover from
+				 * the Tcl_FirstHashEntry call or from
+				 * an "array anymore" command).  NULL
+				 * means must call Tcl_NextHashEntry
+				 * to get value to return. */
+    struct ArraySearch *nextPtr;/* Next in list of all active searches
+				 * for this variable, or NULL if this is
+				 * the last one. */
+} ArraySearch;
+
+/*
+ * The structure below defines a variable, which associates a string name
+ * with a Tcl_Obj value. These structures are kept in procedure call frames
+ * (for local variables recognized by the compiler) or in the heap (for
+ * global variables and any variable not known to the compiler). For each
+ * Var structure in the heap, a hash table entry holds the variable name and
+ * a pointer to the Var structure.
+ */
+
+typedef struct Var {
+    union {
+	Tcl_Obj *objPtr;	/* The variable's object value. Used for 
+				 * scalar variables and array elements. */
+	Tcl_HashTable *tablePtr;/* For array variables, this points to
+				 * information about the hash table used
+				 * to implement the associative array. 
+				 * Points to malloc-ed data. */
+	struct Var *linkPtr;	/* If this is a global variable being
+				 * referred to in a procedure, or a variable
+				 * created by "upvar", this field points to
+				 * the referenced variable's Var struct. */
+    } value;
+    char *name;			/* NULL if the variable is in a hashtable,
+				 * otherwise points to the variable's
+				 * name. It is used, e.g., by TclLookupVar
+				 * and "info locals". The storage for the
+				 * characters of the name is not owned by
+				 * the Var and must not be freed when
+				 * freeing the Var. */
+    Namespace *nsPtr;		/* Points to the namespace that contains
+				 * this variable or NULL if the variable is
+				 * a local variable in a Tcl procedure. */
+    Tcl_HashEntry *hPtr;	/* If variable is in a hashtable, either the
+				 * hash table entry that refers to this
+				 * variable or NULL if the variable has been
+				 * detached from its hash table (e.g. an
+				 * array is deleted, but some of its
+				 * elements are still referred to in
+				 * upvars). NULL if the variable is not in a
+				 * hashtable. This is used to delete an
+				 * variable from its hashtable if it is no
+				 * longer needed. */
+    int refCount;		/* Counts number of active uses of this
+				 * variable, not including its entry in the
+				 * call frame or the hash table: 1 for each
+				 * additional variable whose linkPtr points
+				 * here, 1 for each nested trace active on
+				 * variable, and 1 if the variable is a 
+				 * namespace variable. This record can't be
+				 * deleted until refCount becomes 0. */
+    VarTrace *tracePtr;		/* First in list of all traces set for this
+				 * variable. */
+    ArraySearch *searchPtr;	/* First in list of all searches active
+				 * for this variable, or NULL if none. */
+    int flags;			/* Miscellaneous bits of information about
+				 * variable. See below for definitions. */
+} Var;
+
+/*
+ * Flag bits for variables. The first three (VAR_SCALAR, VAR_ARRAY, and
+ * VAR_LINK) are mutually exclusive and give the "type" of the variable.
+ * VAR_UNDEFINED is independent of the variable's type. 
+ *
+ * VAR_SCALAR -			1 means this is a scalar variable and not
+ *				an array or link. The "objPtr" field points
+ *				to the variable's value, a Tcl object.
+ * VAR_ARRAY -			1 means this is an array variable rather
+ *				than a scalar variable or link. The
+ *				"tablePtr" field points to the array's
+ *				hashtable for its elements.
+ * VAR_LINK - 			1 means this Var structure contains a
+ *				pointer to another Var structure that
+ *				either has the real value or is itself
+ *				another VAR_LINK pointer. Variables like
+ *				this come about through "upvar" and "global"
+ *				commands, or through references to variables
+ *				in enclosing namespaces.
+ * VAR_UNDEFINED -		1 means that the variable is in the process
+ *				of being deleted. An undefined variable
+ *				logically does not exist and survives only
+ *				while it has a trace, or if it is a global
+ *				variable currently being used by some
+ *				procedure.
+ * VAR_IN_HASHTABLE -		1 means this variable is in a hashtable and
+ *				the Var structure is malloced. 0 if it is
+ *				a local variable that was assigned a slot
+ *				in a procedure frame by	the compiler so the
+ *				Var storage is part of the call frame.
+ * VAR_TRACE_ACTIVE -		1 means that trace processing is currently
+ *				underway for a read or write access, so
+ *				new read or write accesses should not cause
+ *				trace procedures to be called and the
+ *				variable can't be deleted.
+ * VAR_ARRAY_ELEMENT -		1 means that this variable is an array
+ *				element, so it is not legal for it to be
+ *				an array itself (the VAR_ARRAY flag had
+ *				better not be set).
+ * VAR_NAMESPACE_VAR -		1 means that this variable was declared
+ *				as a namespace variable. This flag ensures
+ *				it persists until its namespace is
+ *				destroyed or until the variable is unset;
+ *				it will persist even if it has not been
+ *				initialized and is marked undefined.
+ *				The variable's refCount is incremented to
+ *				reflect the "reference" from its namespace.
+ */
+
+#define VAR_SCALAR		0x1
+#define VAR_ARRAY		0x2
+#define VAR_LINK		0x4
+#define VAR_UNDEFINED	        0x8
+#define VAR_IN_HASHTABLE	0x10
+#define VAR_TRACE_ACTIVE	0x20
+#define VAR_ARRAY_ELEMENT	0x40
+#define VAR_NAMESPACE_VAR	0x80
+
+/*
+ * Macros to ensure that various flag bits are set properly for variables.
+ * The ANSI C "prototypes" for these macros are:
+ *
+ * EXTERN void	TclSetVarScalar _ANSI_ARGS_((Var *varPtr));
+ * EXTERN void	TclSetVarArray _ANSI_ARGS_((Var *varPtr));
+ * EXTERN void	TclSetVarLink _ANSI_ARGS_((Var *varPtr));
+ * EXTERN void	TclSetVarArrayElement _ANSI_ARGS_((Var *varPtr));
+ * EXTERN void	TclSetVarUndefined _ANSI_ARGS_((Var *varPtr));
+ * EXTERN void	TclClearVarUndefined _ANSI_ARGS_((Var *varPtr));
+ */
+
+#define TclSetVarScalar(varPtr) \
+    (varPtr)->flags = ((varPtr)->flags & ~(VAR_ARRAY|VAR_LINK)) | VAR_SCALAR
+
+#define TclSetVarArray(varPtr) \
+    (varPtr)->flags = ((varPtr)->flags & ~(VAR_SCALAR|VAR_LINK)) | VAR_ARRAY
+
+#define TclSetVarLink(varPtr) \
+    (varPtr)->flags = ((varPtr)->flags & ~(VAR_SCALAR|VAR_ARRAY)) | VAR_LINK
+
+#define TclSetVarArrayElement(varPtr) \
+    (varPtr)->flags = ((varPtr)->flags & ~VAR_ARRAY) | VAR_ARRAY_ELEMENT
+
+#define TclSetVarUndefined(varPtr) \
+    (varPtr)->flags |= VAR_UNDEFINED
+
+#define TclClearVarUndefined(varPtr) \
+    (varPtr)->flags &= ~VAR_UNDEFINED
+
+/*
+ * Macros to read various flag bits of variables.
+ * The ANSI C "prototypes" for these macros are:
+ *
+ * EXTERN int	TclIsVarScalar _ANSI_ARGS_((Var *varPtr));
+ * EXTERN int	TclIsVarLink _ANSI_ARGS_((Var *varPtr));
+ * EXTERN int	TclIsVarArray _ANSI_ARGS_((Var *varPtr));
+ * EXTERN int	TclIsVarUndefined _ANSI_ARGS_((Var *varPtr));
+ * EXTERN int	TclIsVarArrayElement _ANSI_ARGS_((Var *varPtr));
+ */
+    
+#define TclIsVarScalar(varPtr) \
+    ((varPtr)->flags & VAR_SCALAR)
+
+#define TclIsVarLink(varPtr) \
+    ((varPtr)->flags & VAR_LINK)
+
+#define TclIsVarArray(varPtr) \
+    ((varPtr)->flags & VAR_ARRAY)
+
+#define TclIsVarUndefined(varPtr) \
+    ((varPtr)->flags & VAR_UNDEFINED)
+
+#define TclIsVarArrayElement(varPtr) \
+    ((varPtr)->flags & VAR_ARRAY_ELEMENT)
+
+/*
+ *----------------------------------------------------------------
+ * Data structures related to procedures.  These are used primarily
+ * in tclProc.c, tclCompile.c, and tclExecute.c.
+ *----------------------------------------------------------------
+ */
+
+/*
+ * Forward declaration to prevent an error when the forward reference to
+ * Command is encountered in the Proc and ImportRef types declared below.
+ */
+
+struct Command;
+
+/*
+ * The variable-length structure below describes a local variable of a
+ * procedure that was recognized by the compiler. These variables have a
+ * name, an element in the array of compiler-assigned local variables in the
+ * procedure's call frame, and various other items of information. If the
+ * local variable is a formal argument, it may also have a default value.
+ * The compiler can't recognize local variables whose names are
+ * expressions (these names are only known at runtime when the expressions
+ * are evaluated) or local variables that are created as a result of an
+ * "upvar" or "uplevel" command. These other local variables are kept
+ * separately in a hash table in the call frame.
+ */
+
+typedef struct CompiledLocal {
+    struct CompiledLocal *nextPtr;
+				/* Next compiler-recognized local variable
+				 * for this procedure, or NULL if this is
+				 * the last local. */
+    int nameLength;		/* The number of characters in local
+				 * variable's name. Used to speed up
+				 * variable lookups. */
+    int frameIndex;		/* Index in the array of compiler-assigned
+				 * variables in the procedure call frame. */
+    int isArg;			/* 1 if the local variable is a formal
+				 * argument. */
+    int isTemp;			/* 1 if the local variable is an anonymous
+				 * temporary variable. Temporaries have
+				 * a NULL name. */
+    int flags;			/* Flag bits for the local variable. Same as
+				 * the flags for the Var structure above,
+				 * although only VAR_SCALAR, VAR_ARRAY, and
+				 * VAR_LINK make sense. */
+    Tcl_Obj *defValuePtr;	/* Pointer to the default value of an
+				 * argument, if any. NULL if not an argument
+				 * or, if an argument, no default value. */
+    char name[4];		/* Name of the local variable starts here.
+				 * If the name is NULL, this will just be
+				 * '\0'. The actual size of this field will
+				 * be large enough to hold the name. MUST
+				 * BE THE LAST FIELD IN THE STRUCTURE! */
+} CompiledLocal;
+
+/*
+ * The structure below defines a command procedure, which consists of a
+ * collection of Tcl commands plus information about arguments and other
+ * local variables recognized at compile time.
+ */
+
+typedef struct Proc {
+    struct Interp *iPtr;	  /* Interpreter for which this command
+				   * is defined. */
+    int refCount;		  /* Reference count: 1 if still present
+				   * in command table plus 1 for each call
+				   * to the procedure that is currently
+				   * active. This structure can be freed
+				   * when refCount becomes zero. */
+    struct Command *cmdPtr;	  /* Points to the Command structure for
+				   * this procedure. This is used to get
+				   * the namespace in which to execute
+				   * the procedure. */
+    Tcl_Obj *bodyPtr;		  /* Points to the ByteCode object for
+				   * procedure's body command. */
+    int numArgs;		  /* Number of formal parameters. */
+    int numCompiledLocals;	  /* Count of local variables recognized by
+				   * the compiler including arguments and
+				   * temporaries. */
+    CompiledLocal *firstLocalPtr; /* Pointer to first of the procedure's
+				   * compiler-allocated local variables, or
+				   * NULL if none. The first numArgs entries
+				   * in this list describe the procedure's
+				   * formal arguments. */
+    CompiledLocal *lastLocalPtr;  /* Pointer to the last allocated local
+				   * variable or NULL if none. This has
+				   * frame index (numCompiledLocals-1). */
+} Proc;
+
+/*
+ * The structure below defines a command trace.  This is used to allow Tcl
+ * clients to find out whenever a command is about to be executed.
+ */
+
+typedef struct Trace {
+    int level;			/* Only trace commands at nesting level
+				 * less than or equal to this. */
+    Tcl_CmdTraceProc *proc;	/* Procedure to call to trace command. */
+    ClientData clientData;	/* Arbitrary value to pass to proc. */
+    struct Trace *nextPtr;	/* Next in list of traces for this interp. */
+} Trace;
+
+/*
+ * The structure below defines an entry in the assocData hash table which
+ * is associated with an interpreter. The entry contains a pointer to a
+ * function to call when the interpreter is deleted, and a pointer to
+ * a user-defined piece of data.
+ */
+
+typedef struct AssocData {
+    Tcl_InterpDeleteProc *proc;	/* Proc to call when deleting. */
+    ClientData clientData;	/* Value to pass to proc. */
+} AssocData;    
+
+/*
+ * The structure below defines a call frame. A call frame defines a naming
+ * context for a procedure call: its local naming scope (for local
+ * variables) and its global naming scope (a namespace, perhaps the global
+ * :: namespace). A call frame can also define the naming context for a
+ * namespace eval or namespace inscope command: the namespace in which the
+ * command's code should execute. The Tcl_CallFrame structures exist only
+ * while procedures or namespace eval/inscope's are being executed, and
+ * provide a kind of Tcl call stack.
+ * 
+ * WARNING!! The structure definition must be kept consistent with the
+ * Tcl_CallFrame structure in tcl.h. If you change one, change the other.
+ */
+
+typedef struct CallFrame {
+    Namespace *nsPtr;		/* Points to the namespace used to resolve
+				 * commands and global variables. */
+    int isProcCallFrame;	/* If nonzero, the frame was pushed to
+				 * execute a Tcl procedure and may have
+				 * local vars. If 0, the frame was pushed
+				 * to execute a namespace command and var
+				 * references are treated as references to
+				 * namespace vars; varTablePtr and
+				 * compiledLocals are ignored. */
+    int objc;			/* This and objv below describe the
+				 * arguments for this procedure call. */
+    Tcl_Obj *CONST *objv;	/* Array of argument objects. */
+    struct CallFrame *callerPtr;
+				/* Value of interp->framePtr when this
+				 * procedure was invoked (i.e. next higher
+				 * in stack of all active procedures). */
+    struct CallFrame *callerVarPtr;
+				/* Value of interp->varFramePtr when this
+				 * procedure was invoked (i.e. determines
+				 * variable scoping within caller). Same
+				 * as callerPtr unless an "uplevel" command
+				 * or something equivalent was active in
+				 * the caller). */
+    int level;			/* Level of this procedure, for "uplevel"
+				 * purposes (i.e. corresponds to nesting of
+				 * callerVarPtr's, not callerPtr's). 1 for
+				 * outermost procedure, 0 for top-level. */
+    Proc *procPtr;		/* Points to the structure defining the
+				 * called procedure. Used to get information
+				 * such as the number of compiled local
+				 * variables (local variables assigned
+				 * entries ["slots"] in the compiledLocals
+				 * array below). */
+    Tcl_HashTable *varTablePtr;	/* Hash table containing local variables not
+				 * recognized by the compiler, or created at
+				 * execution time through, e.g., upvar.
+				 * Initially NULL and created if needed. */
+    int numCompiledLocals;	/* Count of local variables recognized by
+				 * the compiler including arguments. */
+    Var* compiledLocals;	/* Points to the array of local variables
+				 * recognized by the compiler. The compiler
+				 * emits code that refers to these variables
+				 * using an index into this array. */
+} CallFrame;
+
+/*
+ *----------------------------------------------------------------
+ * Data structures related to history.   These are used primarily
+ * in tclHistory.c
+ *----------------------------------------------------------------
+ */
+
+/*
+ * The structure below defines one history event (a previously-executed
+ * command that can be re-executed in whole or in part).
+ */
+
+typedef struct {
+    char *command;		/* String containing previously-executed
+				 * command. */
+    int bytesAvl;		/* Total # of bytes available at *event (not
+				 * all are necessarily in use now). */
+} HistoryEvent;
+
+/*
+ * The structure below defines a pending revision to the most recent
+ * history event.  Changes are linked together into a list and applied
+ * during the next call to Tcl_RecordHistory.  See the comments at the
+ * beginning of tclHistory.c for information on revisions.
+ */
+
+typedef struct HistoryRev {
+    int firstIndex;		/* Index of the first byte to replace in
+				 * current history event. */
+    int lastIndex;		/* Index of last byte to replace in
+				 * current history event. */
+    int newSize;		/* Number of bytes in newBytes. */
+    char *newBytes;		/* Replacement for the range given by
+				 * firstIndex and lastIndex (malloced). */
+    struct HistoryRev *nextPtr;	/* Next in chain of revisions to apply, or
+				 * NULL for end of list. */
+} HistoryRev;
+
+/*
+ *----------------------------------------------------------------
+ * Data structures related to expressions.  These are used only in
+ * tclExpr.c.
+ *----------------------------------------------------------------
+ */
+
+/*
+ * The data structure below defines a math function (e.g. sin or hypot)
+ * for use in Tcl expressions.
+ */
+
+#define MAX_MATH_ARGS 5
+typedef struct MathFunc {
+    int builtinFuncIndex;	/* If this is a builtin math function, its
+				 * index in the array of builtin functions.
+				 * (tclCompilation.h lists these indices.)
+				 * The value is -1 if this is a new function
+				 * defined by Tcl_CreateMathFunc. The value
+				 * is also -1 if a builtin function is
+				 * replaced by a Tcl_CreateMathFunc call. */
+    int numArgs;		/* Number of arguments for function. */
+    Tcl_ValueType argTypes[MAX_MATH_ARGS];
+				/* Acceptable types for each argument. */
+    Tcl_MathProc *proc;		/* Procedure that implements this function.
+				 * NULL if isBuiltinFunc is 1. */
+    ClientData clientData;	/* Additional argument to pass to the
+				 * function when invoking it. NULL if
+				 * isBuiltinFunc is 1. */
+} MathFunc;
+
+/*
+ *----------------------------------------------------------------
+ * Data structures related to bytecode compilation and execution.
+ * These are used primarily in tclCompile.c, tclExecute.c, and
+ * tclBasic.c.
+ *----------------------------------------------------------------
+ */
+
+/*
+ * Forward declaration to prevent an error when the forward reference to
+ * CompileEnv is encountered in the procedure type CompileProc declared
+ * below.
+ */
+
+struct CompileEnv;
+
+/*
+ * The type of procedures called by the Tcl bytecode compiler to compile
+ * commands. Pointers to these procedures are kept in the Command structure
+ * describing each command. When a CompileProc returns, the interpreter's
+ * result is set to error information, if any. In addition, the CompileProc
+ * returns an integer value, which is one of the following:
+ *
+ * TCL_OK		Compilation completed normally.
+ * TCL_ERROR		Compilation failed because of an error;
+ *			the interpreter's result describes what went wrong.
+ * TCL_OUT_LINE_COMPILE	Compilation failed because, e.g., the command is
+ *			too complex for effective inline compilation. The
+ *			CompileProc believes the command is legal but 
+ *			should be compiled "out of line" by emitting code
+ *			to invoke its command procedure at runtime.
+ */
+
+#define TCL_OUT_LINE_COMPILE	(TCL_CONTINUE + 1)
+
+typedef int (CompileProc) _ANSI_ARGS_((Tcl_Interp *interp, char *string,
+	char *lastChar, int compileFlags, struct CompileEnv *compEnvPtr));
+
+/*
+ * The data structure defining the execution environment for ByteCode's.
+ * There is one ExecEnv structure per Tcl interpreter. It holds the
+ * evaluation stack that holds command operands and results. The stack grows
+ * towards increasing addresses. The "stackTop" member is cached by
+ * TclExecuteByteCode in a local variable: it must be set before calling
+ * TclExecuteByteCode and will be restored by TclExecuteByteCode before it
+ * returns.
+ */
+
+typedef union StackItem {
+    Tcl_Obj *o;			/* Stack item as a pointer to a Tcl_Obj. */
+    int      i;			/* Stack item as an integer. */
+    VOID    *p;			/* Stack item as an arbitrary pointer. */
+} StackItem;
+
+typedef struct ExecEnv {
+    StackItem *stackPtr;	/* Points to the first item in the
+				 * evaluation stack on the heap. */
+    int stackTop;		/* Index of current top of stack; -1 when
+				 * the stack is empty. */
+    int stackEnd;		/* Index of last usable item in stack. */
+} ExecEnv;
+
+/*
+ *----------------------------------------------------------------
+ * Data structures related to commands.
+ *----------------------------------------------------------------
+ */
+
+/*
+ * An imported command is created in an namespace when it imports a "real"
+ * command from another namespace. An imported command has a Command
+ * structure that points (via its ClientData value) to the "real" Command
+ * structure in the source namespace's command table. The real command
+ * records all the imported commands that refer to it in a list of ImportRef
+ * structures so that they can be deleted when the real command is deleted.  */
+
+typedef struct ImportRef {
+    struct Command *importedCmdPtr;
+    				/* Points to the imported command created in
+				 * an importing namespace; this command
+				 * redirects its invocations to the "real"
+				 * command. */
+    struct ImportRef *nextPtr;	/* Next element on the linked list of
+				 * imported commands that refer to the
+				 * "real" command. The real command deletes
+				 * these imported commands on this list when
+				 * it is deleted. */
+} ImportRef;
+
+/*
+ * A Command structure exists for each command in a namespace. The
+ * Tcl_Command opaque type actually refers to these structures.
+ */
+
+typedef struct Command {
+    Tcl_HashEntry *hPtr;	/* Pointer to the hash table entry that
+				 * refers to this command. The hash table is
+				 * either a namespace's command table or an
+				 * interpreter's hidden command table. This
+				 * pointer is used to get a command's name
+				 * from its Tcl_Command handle. NULL means
+				 * that the hash table entry has been
+				 * removed already (this can happen if
+				 * deleteProc causes the command to be
+				 * deleted or recreated). */
+    Namespace *nsPtr;		/* Points to the namespace containing this
+				 * command. */
+    int refCount;		/* 1 if in command hashtable plus 1 for each
+				 * reference from a CmdName Tcl object
+				 * representing a command's name in a
+				 * ByteCode instruction sequence. This
+				 * structure can be freed when refCount
+				 * becomes zero. */
+    int cmdEpoch;		/* Incremented to invalidate any references
+                                 * that point to this command when it is
+				 * renamed, deleted, hidden, or exposed. */
+    CompileProc *compileProc;   /* Procedure called to compile command. NULL
+				 * if no compile proc exists for command. */
+    Tcl_ObjCmdProc *objProc;	/* Object-based command procedure. */
+    ClientData objClientData;	/* Arbitrary value passed to object proc. */
+    Tcl_CmdProc *proc;		/* String-based command procedure. */
+    ClientData clientData;	/* Arbitrary value passed to string proc. */
+    Tcl_CmdDeleteProc *deleteProc;
+				/* Procedure invoked when deleting command
+				 * to, e.g., free all client data. */
+    ClientData deleteData;	/* Arbitrary value passed to deleteProc. */
+    int deleted;		/* Means that the command is in the process
+				 * of being deleted (its deleteProc is
+				 * currently executing). Other attempts to
+				 * delete the command should be ignored. */
+    ImportRef *importRefPtr;	/* List of each imported Command created in
+				 * another namespace when this command is
+				 * imported. These imported commands
+				 * redirect invocations back to this
+				 * command. The list is used to remove all
+				 * those imported commands when deleting
+				 * this "real" command. */
+} Command;
+
+/*
+ *----------------------------------------------------------------
+ * This structure defines an interpreter, which is a collection of
+ * commands plus other state information related to interpreting
+ * commands, such as variable storage. Primary responsibility for
+ * this data structure is in tclBasic.c, but almost every Tcl
+ * source file uses something in here.
+ *----------------------------------------------------------------
+ */
+
+typedef struct Interp {
+
+    /*
+     * Note:  the first three fields must match exactly the fields in
+     * a Tcl_Interp struct (see tcl.h).  If you change one, be sure to
+     * change the other.
+     *
+     * The interpreter's result is held in both the string and the
+     * objResultPtr fields. These fields hold, respectively, the result's
+     * string or object value. The interpreter's result is always in the
+     * result field if that is non-empty, otherwise it is in objResultPtr.
+     * The two fields are kept consistent unless some C code sets
+     * interp->result directly. Programs should not access result and
+     * objResultPtr directly; instead, they should always get and set the
+     * result using procedures such as Tcl_SetObjResult, Tcl_GetObjResult,
+     * and Tcl_GetStringResult. See the SetResult man page for details.
+     */
+
+    char *result;               /* If the last command returned a string
+				 * result, this points to it. Should not be
+				 * accessed directly; see comment above. */
+    Tcl_FreeProc *freeProc;     /* Zero means a string result is statically
+                                 * allocated. TCL_DYNAMIC means string
+                                 * result was allocated with ckalloc and
+                                 * should be freed with ckfree. Other values
+                                 * give address of procedure to invoke to
+                                 * free the string result. Tcl_Eval must
+                                 * free it before executing next command. */
+    int errorLine;		/* When TCL_ERROR is returned, this gives
+				 * the line number in the command where the
+				 * error occurred (1 means first line). */
+    Tcl_Obj *objResultPtr;	/* If the last command returned an object
+				 * result, this points to it. Should not be
+				 * accessed directly; see comment above. */
+    Namespace *globalNsPtr;     /* The interpreter's global namespace. */
+    Tcl_HashTable mathFuncTable;/* Contains all the math functions currently
+				 * defined for the interpreter.  Indexed by
+				 * strings (function names); values have
+				 * type (MathFunc *). */
+
+    /*
+     * Information related to procedures and variables. See tclProc.c
+     * and tclvar.c for usage.
+     */
+
+    int numLevels;		/* Keeps track of how many nested calls to
+				 * Tcl_Eval are in progress for this
+				 * interpreter.  It's used to delay deletion
+				 * of the table until all Tcl_Eval
+				 * invocations are completed. */
+    int maxNestingDepth;	/* If numLevels exceeds this value then Tcl
+				 * assumes that infinite recursion has
+				 * occurred and it generates an error. */
+    CallFrame *framePtr;	/* Points to top-most in stack of all nested
+				 * procedure invocations.  NULL means there
+				 * are no active procedures. */
+    CallFrame *varFramePtr;	/* Points to the call frame whose variables
+				 * are currently in use (same as framePtr
+				 * unless an "uplevel" command is
+				 * executing). NULL means no procedure is
+				 * active or "uplevel 0" is executing. */
+    ActiveVarTrace *activeTracePtr;
+				/* First in list of active traces for
+				 * interp, or NULL if no active traces. */
+    int returnCode;		/* Completion code to return if current
+				 * procedure exits with TCL_RETURN code. */
+    char *errorInfo;		/* Value to store in errorInfo if returnCode
+				 * is TCL_ERROR.  Malloc'ed, may be NULL */
+    char *errorCode;		/* Value to store in errorCode if returnCode
+				 * is TCL_ERROR.  Malloc'ed, may be NULL */
+
+    /*
+     * Information used by Tcl_AppendResult to keep track of partial
+     * results.  See Tcl_AppendResult code for details.
+     */
+
+    char *appendResult;		/* Storage space for results generated
+				 * by Tcl_AppendResult.  Malloc-ed.  NULL
+				 * means not yet allocated. */
+    int appendAvl;		/* Total amount of space available at
+				 * partialResult. */
+    int appendUsed;		/* Number of non-null bytes currently
+				 * stored at partialResult. */
+
+    /*
+     * A cache of compiled regular expressions.  See Tcl_RegExpCompile
+     * in tclUtil.c for details.
+     */
+
+#define NUM_REGEXPS 5
+    char *patterns[NUM_REGEXPS];/* Strings corresponding to compiled
+				 * regular expression patterns.  NULL
+				 * means that this slot isn't used.
+				 * Malloc-ed. */
+    int patLengths[NUM_REGEXPS];/* Number of non-null characters in
+				 * corresponding entry in patterns.
+				 * -1 means entry isn't used. */
+    regexp *regexps[NUM_REGEXPS];
+				/* Compiled forms of above strings.  Also
+				 * malloc-ed, or NULL if not in use yet. */
+
+    /*
+     * Information about packages.  Used only in tclPkg.c.
+     */
+
+    Tcl_HashTable packageTable;	/* Describes all of the packages loaded
+				 * in or available to this interpreter.
+				 * Keys are package names, values are
+				 * (Package *) pointers. */
+    char *packageUnknown;	/* Command to invoke during "package
+				 * require" commands for packages that
+				 * aren't described in packageTable. 
+				 * Malloc'ed, may be NULL. */
+
+    /*
+     * Miscellaneous information:
+     */
+
+    int cmdCount;		/* Total number of times a command procedure
+				 * has been called for this interpreter. */
+    int evalFlags;		/* Flags to control next call to Tcl_Eval.
+				 * Normally zero, but may be set before
+				 * calling Tcl_Eval.  See below for valid
+				 * values. */
+    int termOffset;		/* Offset of character just after last one
+				 * compiled or executed by Tcl_EvalObj. */
+    int compileEpoch;		/* Holds the current "compilation epoch"
+				 * for this interpreter. This is
+				 * incremented to invalidate existing
+				 * ByteCodes when, e.g., a command with a
+				 * compile procedure is redefined. */
+    Proc *compiledProcPtr;	/* If a procedure is being compiled, a
+				 * pointer to its Proc structure; otherwise,
+				 * this is NULL. Set by ObjInterpProc in
+				 * tclProc.c and used by tclCompile.c to
+				 * process local variables appropriately. */
+    char *scriptFile;		/* NULL means there is no nested source
+				 * command active;  otherwise this points to
+				 * the name of the file being sourced (it's
+				 * not malloc-ed:  it points to an argument
+				 * to Tcl_EvalFile. */
+    int flags;			/* Various flag bits.  See below. */
+    long randSeed;		/* Seed used for rand() function. */
+    Trace *tracePtr;		/* List of traces for this interpreter. */
+    Tcl_HashTable *assocData;	/* Hash table for associating data with
+                                 * this interpreter. Cleaned up when
+                                 * this interpreter is deleted. */
+    struct ExecEnv *execEnvPtr;	/* Execution environment for Tcl bytecode
+                                 * execution. Contains a pointer to the
+				 * Tcl evaluation stack. */
+    Tcl_Obj *emptyObjPtr;	/* Points to an object holding an empty
+				 * string. Returned by Tcl_ObjSetVar2 when
+				 * variable traces change a variable in a
+				 * gross way. */
+    char resultSpace[TCL_RESULT_SIZE+1];
+				/* Static space holding small results. */
+} Interp;
+
+/*
+ * EvalFlag bits for Interp structures:
+ *
+ * TCL_BRACKET_TERM	1 means that the current script is terminated by
+ *			a close bracket rather than the end of the string.
+ * TCL_ALLOW_EXCEPTIONS	1 means it's OK for the script to terminate with
+ *			a code other than TCL_OK or TCL_ERROR;  0 means
+ *			codes other than these should be turned into errors.
+ */
+
+#define TCL_BRACKET_TERM	  1
+#define TCL_ALLOW_EXCEPTIONS	  4
+
+/*
+ * Flag bits for Interp structures:
+ *
+ * DELETED:		Non-zero means the interpreter has been deleted:
+ *			don't process any more commands for it, and destroy
+ *			the structure as soon as all nested invocations of
+ *			Tcl_Eval are done.
+ * ERR_IN_PROGRESS:	Non-zero means an error unwind is already in
+ *			progress. Zero means a command proc has been
+ *			invoked since last error occured.
+ * ERR_ALREADY_LOGGED:	Non-zero means information has already been logged
+ *			in $errorInfo for the current Tcl_Eval instance,
+ *			so Tcl_Eval needn't log it (used to implement the
+ *			"error message log" command).
+ * ERROR_CODE_SET:	Non-zero means that Tcl_SetErrorCode has been
+ *			called to record information for the current
+ *			error.  Zero means Tcl_Eval must clear the
+ *			errorCode variable if an error is returned.
+ * EXPR_INITIALIZED:	Non-zero means initialization specific to
+ *			expressions has	been carried out.
+ * DONT_COMPILE_CMDS_INLINE: Non-zero means that the bytecode compiler
+ *			should not compile any commands into an inline
+ *			sequence of instructions. This is set 1, for
+ *			example, when command traces are requested.
+ * RAND_SEED_INITIALIZED: Non-zero means that the randSeed value of the
+ *			interp has not be initialized.  This is set 1
+ *			when we first use the rand() or srand() functions.
+ * SAFE_INTERP:         Non zero means that the current interp is a
+ *                      safe interp (ie it has only the safe commands
+ *                      installed, less priviledge than a regular interp).
+ */
+
+#define DELETED			 1
+#define ERR_IN_PROGRESS		 2
+#define ERR_ALREADY_LOGGED	 4
+#define ERROR_CODE_SET		 8
+#define EXPR_INITIALIZED	 0x10
+#define DONT_COMPILE_CMDS_INLINE 0x20
+#define RAND_SEED_INITIALIZED	 0x40
+#define SAFE_INTERP              0x80
+
+/*
+ *----------------------------------------------------------------
+ * Data structures related to command parsing. These are used in
+ * tclParse.c and its clients.
+ *----------------------------------------------------------------
+ */
+
+/*
+ * The following data structure is used by various parsing procedures
+ * to hold information about where to store the results of parsing
+ * (e.g. the substituted contents of a quoted argument, or the result
+ * of a nested command).  At any given time, the space available
+ * for output is fixed, but a procedure may be called to expand the
+ * space available if the current space runs out.
+ */
+
+typedef struct ParseValue {
+    char *buffer;		/* Address of first character in
+				 * output buffer. */
+    char *next;			/* Place to store next character in
+				 * output buffer. */
+    char *end;			/* Address of the last usable character
+				 * in the buffer. */
+    void (*expandProc) _ANSI_ARGS_((struct ParseValue *pvPtr, int needed));
+				/* Procedure to call when space runs out;
+				 * it will make more space. */
+    ClientData clientData;	/* Arbitrary information for use of
+				 * expandProc. */
+} ParseValue;
+
+/*
+ * A table used to classify input characters to assist in parsing
+ * Tcl commands.  The table should be indexed with a signed character
+ * using the CHAR_TYPE macro.  The character may have a negative
+ * value.  The CHAR_TYPE macro takes a pointer to a signed character
+ * and a pointer to the last character in the source string.  If the
+ * src pointer is pointing at the terminating null of the string,
+ * CHAR_TYPE returns TCL_COMMAND_END.
+ */
+
+extern unsigned char tclTypeTable[];
+#define CHAR_TYPE(src,last) \
+	(((src)==(last))?TCL_COMMAND_END:(tclTypeTable+128)[*(src)])
+
+/*
+ * Possible values returned by CHAR_TYPE. Note that except for TCL_DOLLAR,
+ * these are all one byte values with a single bit set 1. This means these
+ * values may be bit-or'ed together (except for TCL_DOLLAR) to quickly test
+ * whether a character is one of several different kinds of characters.
+ *
+ * TCL_NORMAL -		All characters that don't have special significance
+ *			to the Tcl language.
+ * TCL_SPACE -		Character is space, tab, or return.
+ * TCL_COMMAND_END -	Character is newline or semicolon or close-bracket
+ *			or terminating null.
+ * TCL_QUOTE -		Character is a double-quote.
+ * TCL_OPEN_BRACKET -	Character is a "[".
+ * TCL_OPEN_BRACE -	Character is a "{".
+ * TCL_CLOSE_BRACE -	Character is a "}".
+ * TCL_BACKSLASH -	Character is a "\".
+ * TCL_DOLLAR - 	Character is a "$".
+ */
+
+#define TCL_NORMAL		0x01
+#define TCL_SPACE		0x02
+#define TCL_COMMAND_END		0x04
+#define TCL_QUOTE		0x08
+#define TCL_OPEN_BRACKET	0x10
+#define TCL_OPEN_BRACE		0x20
+#define TCL_CLOSE_BRACE		0x40
+#define TCL_BACKSLASH		0x80
+#define TCL_DOLLAR		0x00
+
+/*
+ * Maximum number of levels of nesting permitted in Tcl commands (used
+ * to catch infinite recursion).
+ */
+
+#define MAX_NESTING_DEPTH	1000
+
+/*
+ * The macro below is used to modify a "char" value (e.g. by casting
+ * it to an unsigned character) so that it can be used safely with
+ * macros such as isspace.
+ */
+
+#define UCHAR(c) ((unsigned char) (c))
+
+/*
+ * This macro is used to determine the offset needed to safely allocate any
+ * data structure in memory. Given a starting offset or size, it "rounds up"
+ * or "aligns" the offset to the next 8-byte boundary so that any data
+ * structure can be placed at the resulting offset without fear of an
+ * alignment error.
+ *
+ * WARNING!! DO NOT USE THIS MACRO TO ALIGN POINTERS: it will produce
+ * the wrong result on platforms that allocate addresses that are divisible
+ * by 4 or 2. Only use it for offsets or sizes.
+ */
+
+#define TCL_ALIGN(x) (((int)(x) + 7) & ~7)
+
+/*
+ * The following macros are used to specify the runtime platform
+ * setting of the tclPlatform variable.
+ */
+
+typedef enum {
+    TCL_PLATFORM_UNIX,		/* Any Unix-like OS. */
+    TCL_PLATFORM_MAC,		/* MacOS. */
+    TCL_PLATFORM_WINDOWS	/* Any Microsoft Windows OS. */
+} TclPlatformType;
+
+/*
+ * Flags for TclInvoke:
+ *
+ * TCL_INVOKE_HIDDEN		Invoke a hidden command; if not set,
+ *				invokes an exposed command.
+ * TCL_INVOKE_NO_UNKNOWN	If set, "unknown" is not invoked if
+ *				the command to be invoked is not found.
+ *				Only has an effect if invoking an exposed
+ *				command, i.e. if TCL_INVOKE_HIDDEN is not
+ *				also set.
+ */
+
+#define	TCL_INVOKE_HIDDEN	(1<<0)
+#define TCL_INVOKE_NO_UNKNOWN	(1<<1)
+
+/*
+ * The structure used as the internal representation of Tcl list
+ * objects. This is an array of pointers to the element objects. This array
+ * is grown (reallocated and copied) as necessary to hold all the list's
+ * element pointers. The array might contain more slots than currently used
+ * to hold all element pointers. This is done to make append operations
+ * faster.
+ */
+
+typedef struct List {
+    int maxElemCount;		/* Total number of element array slots. */
+    int elemCount;		/* Current number of list elements. */
+    Tcl_Obj **elements;		/* Array of pointers to element objects. */
+} List;
+
+/*
+ * The following types are used for getting and storing platform-specific
+ * file attributes in tclFCmd.c and the various platform-versions of
+ * that file. This is done to have as much common code as possible
+ * in the file attributes code. For more information about the callbacks,
+ * see TclFileAttrsCmd in tclFCmd.c.
+ */
+
+typedef int (TclGetFileAttrProc) _ANSI_ARGS_((Tcl_Interp *interp,
+	int objIndex, char *fileName, 
+	Tcl_Obj **attrObjPtrPtr));
+typedef int (TclSetFileAttrProc) _ANSI_ARGS_((Tcl_Interp *interp,
+	int objIndex, char *fileName, 
+	Tcl_Obj *attrObjPtr));
+
+typedef struct TclFileAttrProcs {
+    TclGetFileAttrProc *getProc; 	/* The procedure for getting attrs. */
+    TclSetFileAttrProc *setProc;	/* The procedure for setting attrs. */
+} TclFileAttrProcs;
+
+/*
+ * Opaque handle used in pipeline routines to encapsulate platform-dependent
+ * state. 
+ */
+
+typedef struct TclFile_ *TclFile;
+    
+/*
+ *----------------------------------------------------------------
+ * Variables shared among Tcl modules but not used by the outside world.
+ *----------------------------------------------------------------
+ */
+
+extern Tcl_Time			tclBlockTime;
+extern int			tclBlockTimeSet;
+extern char *			tclExecutableName;
+extern Tcl_ChannelType	 	tclFileChannelType;
+extern char *			tclMemDumpFileName;
+extern TclPlatformType		tclPlatform;
+extern char *			tclpFileAttrStrings[];
+extern CONST TclFileAttrProcs   tclpFileAttrProcs[];
+
+/*
+ * Variables denoting the Tcl object types defined in the core.
+ */
+
+extern Tcl_ObjType	tclBooleanType;
+extern Tcl_ObjType	tclByteCodeType;
+extern Tcl_ObjType	tclDoubleType;
+extern Tcl_ObjType	tclIntType;
+extern Tcl_ObjType	tclListType;
+extern Tcl_ObjType	tclStringType;
+
+/*
+ * The head of the list of free Tcl objects, and the total number of Tcl
+ * objects ever allocated and freed.
+ */
+
+extern Tcl_Obj *	tclFreeObjList;
+
+#ifdef TCL_COMPILE_STATS
+extern long 		tclObjsAlloced;
+extern long 		tclObjsFreed;
+#endif /* TCL_COMPILE_STATS */
+
+/*
+ * Pointer to a heap-allocated string of length zero that the Tcl core uses
+ * as the value of an empty string representation for an object. This value
+ * is shared by all new objects allocated by Tcl_NewObj.
+ */
+
+extern char *		tclEmptyStringRep;
+
+/*
+ *----------------------------------------------------------------
+ * Procedures shared among Tcl modules but not used by the outside
+ * world:
+ *----------------------------------------------------------------
+ */
+
+EXTERN void		panic _ANSI_ARGS_(TCL_VARARGS(char *,format));
+EXTERN void		TclAllocateFreeObjects _ANSI_ARGS_((void));
+EXTERN int		TclChdir _ANSI_ARGS_((Tcl_Interp *interp,
+			    char *dirName));
+EXTERN int		TclCleanupChildren _ANSI_ARGS_((Tcl_Interp *interp,
+		            int numPids, Tcl_Pid *pidPtr,
+			    Tcl_Channel errorChan));
+EXTERN void		TclCleanupCommand _ANSI_ARGS_((Command *cmdPtr));
+EXTERN char *		TclConvertToNative _ANSI_ARGS_((Tcl_Interp *interp,
+			    char *name, Tcl_DString *bufferPtr));
+EXTERN char *		TclConvertToNetwork _ANSI_ARGS_((Tcl_Interp *interp,
+			    char *name, Tcl_DString *bufferPtr));
+EXTERN int		TclCopyAndCollapse _ANSI_ARGS_((int count,
+			    char *src, char *dst));
+EXTERN int		TclCopyChannel _ANSI_ARGS_((Tcl_Interp *interp,
+			    Tcl_Channel inChan, Tcl_Channel outChan,
+			    int toRead, Tcl_Obj *cmdPtr));
+/*
+ * TclCreatePipeline unofficially exported for use by BLT.
+ */
+EXTERN int		TclCreatePipeline _ANSI_ARGS_((Tcl_Interp *interp,
+			    int argc, char **argv, Tcl_Pid **pidArrayPtr,
+			    TclFile *inPipePtr, TclFile *outPipePtr,
+			    TclFile *errFilePtr));
+EXTERN int		TclCreateProc _ANSI_ARGS_((Tcl_Interp *interp,
+			    Namespace *nsPtr, char *procName,
+			    Tcl_Obj *argsPtr, Tcl_Obj *bodyPtr,
+			    Proc **procPtrPtr));
+EXTERN void		TclDeleteCompiledLocalVars _ANSI_ARGS_((
+    			    Interp *iPtr, CallFrame *framePtr));
+EXTERN void		TclDeleteVars _ANSI_ARGS_((Interp *iPtr,
+			    Tcl_HashTable *tablePtr));
+EXTERN int		TclDoGlob _ANSI_ARGS_((Tcl_Interp *interp,
+			    char *separators, Tcl_DString *headPtr,
+			    char *tail));
+EXTERN void		TclDumpMemoryInfo _ANSI_ARGS_((FILE *outFile));
+EXTERN void		TclExpandParseValue _ANSI_ARGS_((ParseValue *pvPtr,
+			    int needed));
+EXTERN void		TclExprFloatError _ANSI_ARGS_((Tcl_Interp *interp,
+			    double value));
+EXTERN int		TclFileAttrsCmd _ANSI_ARGS_((Tcl_Interp *interp,
+			    int objc, Tcl_Obj *CONST objv[]));
+EXTERN int		TclFileCopyCmd _ANSI_ARGS_((Tcl_Interp *interp, 
+			    int argc, char **argv)) ;
+EXTERN int 		TclFileDeleteCmd _ANSI_ARGS_((Tcl_Interp *interp,
+			    int argc, char **argv));
+EXTERN int		TclFileMakeDirsCmd _ANSI_ARGS_((Tcl_Interp *interp,
+			    int argc, char **argv)) ;
+EXTERN int		TclFileRenameCmd _ANSI_ARGS_((Tcl_Interp *interp,
+			    int argc, char **argv)) ;
+EXTERN void		TclFinalizeCompExecEnv _ANSI_ARGS_((void));
+EXTERN void		TclFinalizeEnvironment _ANSI_ARGS_((void));
+EXTERN void		TclFinalizeExecEnv _ANSI_ARGS_((void));
+EXTERN int		TclFindElement _ANSI_ARGS_((Tcl_Interp *interp,
+			    char *list, int listLength, char **elementPtr,
+			    char **nextPtr, int *sizePtr, int *bracePtr));
+EXTERN Proc *		TclFindProc _ANSI_ARGS_((Interp *iPtr,
+			    char *procName));
+EXTERN int		TclFormatInt _ANSI_ARGS_((char *buffer, long n));
+EXTERN void		TclFreePackageInfo _ANSI_ARGS_((Interp *iPtr));
+EXTERN void		TclGetAndDetachPids _ANSI_ARGS_((Tcl_Interp *interp,
+		            Tcl_Channel chan));
+EXTERN char *		TclGetCwd _ANSI_ARGS_((Tcl_Interp *interp));
+EXTERN int		TclGetDate _ANSI_ARGS_((char *p,
+			    unsigned long now, long zone,
+			    unsigned long *timePtr));
+EXTERN Tcl_Channel	TclGetDefaultStdChannel _ANSI_ARGS_((int type));
+EXTERN Tcl_Obj *	TclGetElementOfIndexedArray _ANSI_ARGS_((
+                            Tcl_Interp *interp, int localIndex,
+			    Tcl_Obj *elemPtr, int leaveErrorMsg));
+EXTERN char *		TclGetEnv _ANSI_ARGS_((CONST char *name));
+EXTERN char *		TclGetExtension _ANSI_ARGS_((char *name));
+EXTERN int		TclGetFrame _ANSI_ARGS_((Tcl_Interp *interp,
+			    char *string, CallFrame **framePtrPtr));
+EXTERN int		TclGetIdleGeneration _ANSI_ARGS_((void));
+EXTERN int		TclGetIntForIndex _ANSI_ARGS_((Tcl_Interp *interp,
+			    Tcl_Obj *objPtr, int endValue, int *indexPtr));
+EXTERN Tcl_Obj *	TclGetIndexedScalar _ANSI_ARGS_((Tcl_Interp *interp,
+			    int localIndex, int leaveErrorMsg));
+EXTERN int		TclGetLong _ANSI_ARGS_((Tcl_Interp *interp,
+			    char *string, long *longPtr));
+EXTERN int		TclGetLoadedPackages _ANSI_ARGS_((
+			    Tcl_Interp *interp, char *targetName));
+EXTERN int		TclGetNamespaceForQualName _ANSI_ARGS_((
+			    Tcl_Interp *interp, char *qualName,
+			    Namespace *cxtNsPtr, int flags,
+			    Namespace **nsPtrPtr, Namespace **altNsPtrPtr,
+			    Namespace **actualCxtPtrPtr,
+			    char **simpleNamePtr));
+EXTERN int		TclGetOpenMode _ANSI_ARGS_((Tcl_Interp *interp,
+        		    char *string, int *seekFlagPtr));
+EXTERN Tcl_Command	TclGetOriginalCommand _ANSI_ARGS_((
+			    Tcl_Command command));
+EXTERN char *		TclGetUserHome _ANSI_ARGS_((char *name,
+			    Tcl_DString *bufferPtr));
+EXTERN int		TclGlobalInvoke _ANSI_ARGS_((Tcl_Interp *interp,
+		            int argc, char **argv, int flags));
+EXTERN int		TclGuessPackageName _ANSI_ARGS_((char *fileName,
+			    Tcl_DString *bufPtr));
+EXTERN int              TclHasPipes _ANSI_ARGS_((void));
+EXTERN int		TclHasSockets _ANSI_ARGS_((Tcl_Interp *interp));
+EXTERN int		TclHideUnsafeCommands _ANSI_ARGS_((
+    			    Tcl_Interp *interp));
+EXTERN int		TclIdlePending _ANSI_ARGS_((void));
+EXTERN int		TclInExit _ANSI_ARGS_((void));
+EXTERN Tcl_Obj *	TclIncrElementOfIndexedArray _ANSI_ARGS_((
+                            Tcl_Interp *interp, int localIndex,
+			    Tcl_Obj *elemPtr, long incrAmount));
+EXTERN Tcl_Obj *	TclIncrIndexedScalar _ANSI_ARGS_((
+                            Tcl_Interp *interp, int localIndex,
+			    long incrAmount));
+EXTERN Tcl_Obj *	TclIncrVar2 _ANSI_ARGS_((Tcl_Interp *interp,
+			    Tcl_Obj *part1Ptr, Tcl_Obj *part2Ptr,
+			    long incrAmount, int part1NotParsed));
+EXTERN void		TclInitNamespaces _ANSI_ARGS_((void));
+EXTERN int		TclInterpInit _ANSI_ARGS_((Tcl_Interp *interp));
+EXTERN int		TclInvoke _ANSI_ARGS_((Tcl_Interp *interp,
+		            int argc, char **argv, int flags));
+EXTERN int		TclInvokeObjectCommand _ANSI_ARGS_((
+                            ClientData clientData, Tcl_Interp *interp,
+                            int argc, char **argv));
+EXTERN int		TclInvokeStringCommand _ANSI_ARGS_((
+                            ClientData clientData, Tcl_Interp *interp,
+                            int objc, Tcl_Obj *CONST objv[]));
+EXTERN Proc *		TclIsProc _ANSI_ARGS_((Command *cmdPtr));
+EXTERN int		TclLoadFile _ANSI_ARGS_((Tcl_Interp *interp,
+			    char *fileName, char *sym1, char *sym2,
+			    Tcl_PackageInitProc **proc1Ptr,
+			    Tcl_PackageInitProc **proc2Ptr));
+EXTERN int		TclLooksLikeInt _ANSI_ARGS_((char *p));
+EXTERN Var *		TclLookupVar _ANSI_ARGS_((Tcl_Interp *interp,
+			    char *part1, char *part2, int flags, char *msg,
+			    int createPart1, int createPart2,
+			    Var **arrayPtrPtr));
+EXTERN int		TclMakeFileTable _ANSI_ARGS_((Tcl_Interp *interp,
+                            int noStdio));
+EXTERN int		TclMatchFiles _ANSI_ARGS_((Tcl_Interp *interp,
+			    char *separators, Tcl_DString *dirPtr,
+			    char *pattern, char *tail));
+EXTERN int		TclNeedSpace _ANSI_ARGS_((char *start, char *end));
+EXTERN int		TclObjCommandComplete _ANSI_ARGS_((Tcl_Obj *cmdPtr));
+EXTERN int		TclObjInterpProc _ANSI_ARGS_((ClientData clientData,
+		    	    Tcl_Interp *interp, int objc,
+			    Tcl_Obj *CONST objv[]));
+EXTERN int		TclObjInvoke _ANSI_ARGS_((Tcl_Interp *interp,
+		            int objc, Tcl_Obj *CONST objv[], int flags));
+EXTERN int		TclObjInvokeGlobal _ANSI_ARGS_((Tcl_Interp *interp,
+		            int objc, Tcl_Obj *CONST objv[], int flags));
+EXTERN char *		TclpAlloc _ANSI_ARGS_((unsigned int size));
+
+/*
+ * On a Mac, we can exit gracefully if the stack gets too small.
+ */
+
+#ifdef MAC_TCL
+EXTERN int		TclpCheckStackSpace _ANSI_ARGS_((void));
+#else
+#define TclpCheckStackSpace() (1)
+#endif
+
+EXTERN int		TclpCloseFile _ANSI_ARGS_((TclFile file));
+EXTERN int		TclpCopyFile _ANSI_ARGS_((char *source, char *dest));
+EXTERN int              TclpCopyDirectory _ANSI_ARGS_((char *source,
+			    char *dest, Tcl_DString *errorPtr));
+EXTERN Tcl_Channel	TclpCreateCommandChannel _ANSI_ARGS_((
+    			    TclFile readFile, TclFile writeFile,
+			    TclFile errorFile, int numPids, Tcl_Pid *pidPtr));
+EXTERN int              TclpCreateDirectory _ANSI_ARGS_((char *path));
+EXTERN int              TclpCreatePipe _ANSI_ARGS_((TclFile *readPipe,
+			    TclFile *writePipe));
+EXTERN int		TclpCreateProcess _ANSI_ARGS_((Tcl_Interp *interp,
+			    int argc, char **argv, TclFile inputFile, 
+			    TclFile outputFile, TclFile errorFile,
+			    Tcl_Pid *pidPtr));
+EXTERN TclFile		TclpCreateTempFile _ANSI_ARGS_((char *contents, 
+			    Tcl_DString *namePtr));
+EXTERN int              TclpDeleteFile _ANSI_ARGS_((char *path));
+EXTERN void		TclpFree _ANSI_ARGS_((char *ptr));
+EXTERN unsigned long	TclpGetClicks _ANSI_ARGS_((void));
+EXTERN unsigned long	TclpGetSeconds _ANSI_ARGS_((void));
+EXTERN void		TclpGetTime _ANSI_ARGS_((Tcl_Time *time));
+EXTERN int		TclpGetTimeZone _ANSI_ARGS_((unsigned long time));
+EXTERN char *		TclpGetTZName _ANSI_ARGS_((void));
+EXTERN int		TclpListVolumes _ANSI_ARGS_((Tcl_Interp *interp));
+EXTERN TclFile		TclpMakeFile _ANSI_ARGS_((Tcl_Channel channel,
+			    int direction));
+EXTERN TclFile		TclpOpenFile _ANSI_ARGS_((char *fname, int mode));
+EXTERN char *		TclpRealloc _ANSI_ARGS_((char *ptr,
+			    unsigned int size));
+EXTERN int              TclpRemoveDirectory _ANSI_ARGS_((char *path,
+			    int recursive, Tcl_DString *errorPtr));
+EXTERN int              TclpRenameFile _ANSI_ARGS_((char *source, char *dest));
+EXTERN char *		TclpSetEnv _ANSI_ARGS_((CONST char *name,
+			    CONST char *value));
+#ifndef TclpSysAlloc
+EXTERN VOID * 		TclpSysAlloc _ANSI_ARGS_((long size, int isBin));
+#endif
+#ifndef TclpSysFree
+EXTERN void 		TclpSysFree _ANSI_ARGS_((VOID *ptr));
+#endif
+#ifndef TclpSysRealloc
+EXTERN VOID * 		TclpSysRealloc _ANSI_ARGS_((VOID *cp,
+			    unsigned int size));
+#endif
+EXTERN int		TclParseBraces _ANSI_ARGS_((Tcl_Interp *interp,
+			    char *string, char **termPtr, ParseValue *pvPtr));
+EXTERN int		TclParseNestedCmd _ANSI_ARGS_((Tcl_Interp *interp,
+			    char *string, int flags, char **termPtr,
+			    ParseValue *pvPtr));
+EXTERN int		TclParseQuotes _ANSI_ARGS_((Tcl_Interp *interp,
+			    char *string, int termChar, int flags,
+			    char **termPtr, ParseValue *pvPtr));
+EXTERN void		TclPlatformExit _ANSI_ARGS_((int status));
+EXTERN void		TclPlatformInit _ANSI_ARGS_((Tcl_Interp *interp));
+EXTERN char *		TclPrecTraceProc _ANSI_ARGS_((ClientData clientData,
+			    Tcl_Interp *interp, char *name1, char *name2,
+			    int flags));
+EXTERN int		TclPreventAliasLoop _ANSI_ARGS_((Tcl_Interp *interp,
+		            Tcl_Interp *cmdInterp, Tcl_Command cmd));
+EXTERN void		TclPrintByteCodeObj _ANSI_ARGS_((Tcl_Interp *interp,
+		            Tcl_Obj *objPtr));
+EXTERN int		TclRenameCommand _ANSI_ARGS_((Tcl_Interp *interp,
+			    char *oldName, char *newName)) ;
+EXTERN void		TclResetShadowedCmdRefs _ANSI_ARGS_((
+			    Tcl_Interp *interp, Command *newCmdPtr));
+EXTERN int		TclServiceIdle _ANSI_ARGS_((void));
+EXTERN Tcl_Obj *	TclSetElementOfIndexedArray _ANSI_ARGS_((
+                            Tcl_Interp *interp, int localIndex,
+			    Tcl_Obj *elemPtr, Tcl_Obj *objPtr,
+			    int leaveErrorMsg));
+EXTERN Tcl_Obj *	TclSetIndexedScalar _ANSI_ARGS_((Tcl_Interp *interp,
+			    int localIndex, Tcl_Obj *objPtr,
+			    int leaveErrorMsg));
+EXTERN void		TclSetupEnv _ANSI_ARGS_((Tcl_Interp *interp));
+EXTERN int		TclSockGetPort _ANSI_ARGS_((Tcl_Interp *interp,
+		            char *string, char *proto, int *portPtr));
+EXTERN int		TclSockMinimumBuffers _ANSI_ARGS_((int sock,
+        		    int size));
+EXTERN void		TclTeardownNamespace _ANSI_ARGS_((Namespace *nsPtr));
+EXTERN int		TclTestChannelCmd _ANSI_ARGS_((ClientData clientData,
+			    Tcl_Interp *interp, int argc, char **argv));
+EXTERN int		TclTestChannelEventCmd _ANSI_ARGS_((
+    			    ClientData clientData, Tcl_Interp *interp,
+                            int argc, char **argv));
+EXTERN int		TclUpdateReturnInfo _ANSI_ARGS_((Interp *iPtr));
+EXTERN char *		TclWordEnd _ANSI_ARGS_((char *start, char *lastChar,
+			    int nested, int *semiPtr));
+
+/*
+ *----------------------------------------------------------------
+ * Command procedures in the generic core:
+ *----------------------------------------------------------------
+ */
+
+EXTERN int	Tcl_AfterObjCmd _ANSI_ARGS_((ClientData clientData,
+		    Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[]));
+EXTERN int	Tcl_AppendObjCmd _ANSI_ARGS_((ClientData clientData,
+		    Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[]));
+EXTERN int	Tcl_ArrayObjCmd _ANSI_ARGS_((ClientData clientData,
+		    Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[]));
+EXTERN int	Tcl_BinaryObjCmd _ANSI_ARGS_((ClientData clientData,
+		    Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[]));
+EXTERN int	Tcl_BreakCmd _ANSI_ARGS_((ClientData clientData,
+		    Tcl_Interp *interp, int argc, char **argv));
+EXTERN int	Tcl_CaseObjCmd _ANSI_ARGS_((ClientData clientData,
+		    Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[]));
+EXTERN int	Tcl_CatchObjCmd _ANSI_ARGS_((ClientData clientData,
+		    Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[]));
+EXTERN int	Tcl_CdObjCmd _ANSI_ARGS_((ClientData clientData,
+		    Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[]));
+EXTERN int	Tcl_ClockObjCmd _ANSI_ARGS_((ClientData clientData,
+		    Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[]));
+EXTERN int	Tcl_CloseObjCmd _ANSI_ARGS_((ClientData clientData,
+		    Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[]));
+EXTERN int	Tcl_ConcatObjCmd _ANSI_ARGS_((ClientData clientData,
+		    Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[]));
+EXTERN int	Tcl_ContinueCmd _ANSI_ARGS_((ClientData clientData,
+		    Tcl_Interp *interp, int argc, char **argv));
+EXTERN int	Tcl_EofObjCmd _ANSI_ARGS_((ClientData clientData,
+		    Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[]));
+EXTERN int	Tcl_ErrorObjCmd _ANSI_ARGS_((ClientData clientData,
+		    Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[]));
+EXTERN int	Tcl_EvalObjCmd _ANSI_ARGS_((ClientData clientData,
+		    Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[]));
+EXTERN int	Tcl_ExecCmd _ANSI_ARGS_((ClientData clientData,
+		    Tcl_Interp *interp, int argc, char **argv));
+EXTERN int	Tcl_ExitObjCmd _ANSI_ARGS_((ClientData clientData,
+		    Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[]));
+EXTERN int	Tcl_ExprObjCmd _ANSI_ARGS_((ClientData clientData,
+		    Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[]));
+EXTERN int	Tcl_FblockedObjCmd _ANSI_ARGS_((ClientData clientData,
+		    Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[]));
+EXTERN int	Tcl_FconfigureCmd _ANSI_ARGS_((ClientData clientData,
+		    Tcl_Interp *interp, int argc, char **argv));
+EXTERN int	Tcl_FcopyObjCmd _ANSI_ARGS_((ClientData dummy,
+		    Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[]));
+EXTERN int	Tcl_FileObjCmd _ANSI_ARGS_((ClientData dummy,
+		    Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[]));
+EXTERN int	Tcl_FileEventCmd _ANSI_ARGS_((ClientData clientData,
+		    Tcl_Interp *interp, int argc, char **argv));
+EXTERN int	Tcl_FlushObjCmd _ANSI_ARGS_((ClientData clientData,
+		    Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[]));
+EXTERN int	Tcl_ForCmd _ANSI_ARGS_((ClientData clientData,
+		    Tcl_Interp *interp, int argc, char **argv));
+EXTERN int	Tcl_ForeachObjCmd _ANSI_ARGS_((ClientData clientData,
+		    Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[]));
+EXTERN int	Tcl_FormatObjCmd _ANSI_ARGS_((ClientData dummy,
+		    Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[]));
+EXTERN int	Tcl_GetsObjCmd _ANSI_ARGS_((ClientData clientData,
+		    Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[]));
+EXTERN int	Tcl_GlobalObjCmd _ANSI_ARGS_((ClientData clientData,
+		    Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[]));
+EXTERN int	Tcl_GlobCmd _ANSI_ARGS_((ClientData clientData,
+		    Tcl_Interp *interp, int argc, char **argv));
+EXTERN int	Tcl_HistoryCmd _ANSI_ARGS_((ClientData clientData,
+		    Tcl_Interp *interp, int argc, char **argv));
+EXTERN int	Tcl_IfCmd _ANSI_ARGS_((ClientData clientData,
+		    Tcl_Interp *interp, int argc, char **argv));
+EXTERN int	Tcl_IncrCmd _ANSI_ARGS_((ClientData clientData,
+		    Tcl_Interp *interp, int argc, char **argv));
+EXTERN int	Tcl_InfoObjCmd _ANSI_ARGS_((ClientData clientData,
+		    Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[]));
+EXTERN int	Tcl_InterpObjCmd _ANSI_ARGS_((ClientData clientData,
+		    Tcl_Interp *interp, int argc, Tcl_Obj *CONST objv[]));
+EXTERN int	Tcl_JoinObjCmd _ANSI_ARGS_((ClientData clientData,
+		    Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[]));
+EXTERN int	Tcl_LappendObjCmd _ANSI_ARGS_((ClientData clientData,
+		    Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[]));
+EXTERN int	Tcl_LindexObjCmd _ANSI_ARGS_((ClientData clientData,
+		    Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[]));
+EXTERN int	Tcl_LinsertObjCmd _ANSI_ARGS_((ClientData clientData,
+		    Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[]));
+EXTERN int	Tcl_LlengthObjCmd _ANSI_ARGS_((ClientData clientData,
+		    Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[]));
+EXTERN int	Tcl_ListObjCmd _ANSI_ARGS_((ClientData clientData,
+		    Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[]));
+EXTERN int	Tcl_LoadCmd _ANSI_ARGS_((ClientData clientData,
+		    Tcl_Interp *interp, int argc, char **argv));
+EXTERN int	Tcl_LrangeObjCmd _ANSI_ARGS_((ClientData clientData,
+		    Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[]));
+EXTERN int	Tcl_LreplaceObjCmd _ANSI_ARGS_((ClientData clientData,
+		    Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[]));
+EXTERN int	Tcl_LsearchObjCmd _ANSI_ARGS_((ClientData clientData,
+		    Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[]));
+EXTERN int	Tcl_LsortObjCmd _ANSI_ARGS_((ClientData clientData,
+		    Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[]));
+EXTERN int	Tcl_NamespaceObjCmd _ANSI_ARGS_((ClientData clientData,
+		    Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[]));
+EXTERN int	Tcl_OpenCmd _ANSI_ARGS_((ClientData clientData,
+		    Tcl_Interp *interp, int argc, char **argv));
+EXTERN int	Tcl_PackageCmd _ANSI_ARGS_((ClientData clientData,
+		    Tcl_Interp *interp, int argc, char **argv));
+EXTERN int	Tcl_PidObjCmd _ANSI_ARGS_((ClientData clientData,
+		    Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[]));
+EXTERN int	Tcl_ProcObjCmd _ANSI_ARGS_((ClientData clientData,
+		    Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[]));
+EXTERN int	Tcl_PutsObjCmd _ANSI_ARGS_((ClientData clientData,
+		    Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[]));
+EXTERN int	Tcl_PwdCmd _ANSI_ARGS_((ClientData clientData,
+		    Tcl_Interp *interp, int argc, char **argv));
+EXTERN int	Tcl_ReadObjCmd _ANSI_ARGS_((ClientData clientData,
+		    Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[]));
+EXTERN int	Tcl_RegexpCmd _ANSI_ARGS_((ClientData clientData,
+		    Tcl_Interp *interp, int argc, char **argv));
+EXTERN int	Tcl_RegsubCmd _ANSI_ARGS_((ClientData clientData,
+		    Tcl_Interp *interp, int argc, char **argv));
+EXTERN int	Tcl_RenameObjCmd _ANSI_ARGS_((ClientData clientData,
+		    Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[]));
+EXTERN int	Tcl_ReturnObjCmd _ANSI_ARGS_((ClientData clientData,
+		    Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[]));
+EXTERN int	Tcl_ScanCmd _ANSI_ARGS_((ClientData clientData,
+		    Tcl_Interp *interp, int argc, char **argv));
+EXTERN int	Tcl_SeekCmd _ANSI_ARGS_((ClientData clientData,
+		    Tcl_Interp *interp, int argc, char **argv));
+EXTERN int	Tcl_SetCmd _ANSI_ARGS_((ClientData clientData,
+		    Tcl_Interp *interp, int argc, char **argv));
+EXTERN int	Tcl_SplitObjCmd _ANSI_ARGS_((ClientData clientData,
+		    Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[]));
+EXTERN int	Tcl_SocketCmd _ANSI_ARGS_((ClientData clientData,
+		    Tcl_Interp *interp, int argc, char **argv));
+EXTERN int	Tcl_SourceObjCmd _ANSI_ARGS_((ClientData clientData,
+		    Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[]));
+EXTERN int	Tcl_StringObjCmd _ANSI_ARGS_((ClientData clientData,
+		    Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[]));
+EXTERN int	Tcl_SubstCmd _ANSI_ARGS_((ClientData clientData,
+		    Tcl_Interp *interp, int argc, char **argv));
+EXTERN int	Tcl_SwitchObjCmd _ANSI_ARGS_((ClientData clientData,
+		    Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[]));
+EXTERN int	Tcl_TellCmd _ANSI_ARGS_((ClientData clientData,
+		    Tcl_Interp *interp, int argc, char **argv));
+EXTERN int	Tcl_TimeObjCmd _ANSI_ARGS_((ClientData clientData,
+		    Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[]));
+EXTERN int	Tcl_TraceCmd _ANSI_ARGS_((ClientData clientData,
+		    Tcl_Interp *interp, int argc, char **argv));
+EXTERN int	Tcl_UnsetObjCmd _ANSI_ARGS_((ClientData clientData,
+		    Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[]));
+EXTERN int	Tcl_UpdateCmd _ANSI_ARGS_((ClientData clientData,
+		    Tcl_Interp *interp, int argc, char **argv));
+EXTERN int	Tcl_UplevelObjCmd _ANSI_ARGS_((ClientData clientData,
+		    Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[]));
+EXTERN int	Tcl_UpvarObjCmd _ANSI_ARGS_((ClientData clientData,
+		    Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[]));
+EXTERN int	Tcl_VariableObjCmd _ANSI_ARGS_((ClientData clientData,
+		    Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[]));
+EXTERN int	Tcl_VwaitCmd _ANSI_ARGS_((ClientData clientData,
+		    Tcl_Interp *interp, int argc, char **argv));
+EXTERN int	Tcl_WhileCmd _ANSI_ARGS_((ClientData clientData,
+		    Tcl_Interp *interp, int argc, char **argv));
+
+/*
+ *----------------------------------------------------------------
+ * Command procedures found only in the Mac version of the core:
+ *----------------------------------------------------------------
+ */
+
+#ifdef MAC_TCL
+EXTERN int 	Tcl_EchoCmd _ANSI_ARGS_((ClientData clientData,
+		    Tcl_Interp *interp, int argc, char **argv));
+EXTERN int 	Tcl_LsCmd _ANSI_ARGS_((ClientData clientData,
+		    Tcl_Interp *interp, int argc, char **argv));
+EXTERN int 	Tcl_BeepObjCmd _ANSI_ARGS_((ClientData clientData,
+		    Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[]));
+EXTERN int 	Tcl_MacSourceObjCmd _ANSI_ARGS_((ClientData clientData,
+		    Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[]));
+EXTERN int	Tcl_ResourceObjCmd _ANSI_ARGS_((ClientData clientData,
+		    Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[]));
+#endif
+
+/*
+ *----------------------------------------------------------------
+ * Compilation procedures for commands in the generic core:
+ *----------------------------------------------------------------
+ */
+
+EXTERN int	TclCompileBreakCmd _ANSI_ARGS_((Tcl_Interp *interp,
+		    char *string, char *lastChar, int compileFlags,
+		    struct CompileEnv *compileEnvPtr));
+EXTERN int	TclCompileCatchCmd _ANSI_ARGS_((Tcl_Interp *interp,
+		    char *string, char *lastChar, int compileFlags,
+		    struct CompileEnv *compileEnvPtr));
+EXTERN int	TclCompileContinueCmd _ANSI_ARGS_((Tcl_Interp *interp,
+		    char *string, char *lastChar, int compileFlags,
+		    struct CompileEnv *compileEnvPtr));
+EXTERN int	TclCompileExprCmd _ANSI_ARGS_((Tcl_Interp *interp,
+		    char *string, char *lastChar, int compileFlags,
+		    struct CompileEnv *compileEnvPtr));
+EXTERN int	TclCompileForCmd _ANSI_ARGS_((Tcl_Interp *interp,
+		    char *string, char *lastChar, int compileFlags,
+		    struct CompileEnv *compileEnvPtr));
+EXTERN int	TclCompileForeachCmd _ANSI_ARGS_((Tcl_Interp *interp,
+		    char *string, char *lastChar, int compileFlags,
+		    struct CompileEnv *compileEnvPtr));
+EXTERN int	TclCompileIfCmd _ANSI_ARGS_((Tcl_Interp *interp,
+		    char *string, char *lastChar, int compileFlags,
+		    struct CompileEnv *compileEnvPtr));
+EXTERN int	TclCompileIncrCmd _ANSI_ARGS_((Tcl_Interp *interp,
+		    char *string, char *lastChar, int compileFlags,
+		    struct CompileEnv *compileEnvPtr));
+EXTERN int	TclCompileSetCmd _ANSI_ARGS_((Tcl_Interp *interp,
+		    char *string, char *lastChar, int compileFlags,
+		    struct CompileEnv *compileEnvPtr));
+EXTERN int	TclCompileWhileCmd _ANSI_ARGS_((Tcl_Interp *interp,
+		    char *string, char *lastChar, int compileFlags,
+		    struct CompileEnv *compileEnvPtr));
+
+/*
+ *----------------------------------------------------------------
+ * Macros used by the Tcl core to create and release Tcl objects.
+ * TclNewObj(objPtr) creates a new object denoting an empty string.
+ * TclDecrRefCount(objPtr) decrements the object's reference count,
+ * and frees the object if its reference count is zero.
+ * These macros are inline versions of Tcl_NewObj() and
+ * Tcl_DecrRefCount(). Notice that the names differ in not having
+ * a "_" after the "Tcl". Notice also that these macros reference
+ * their argument more than once, so you should avoid calling them
+ * with an expression that is expensive to compute or has
+ * side effects. The ANSI C "prototypes" for these macros are:
+ *
+ * EXTERN void	TclNewObj _ANSI_ARGS_((Tcl_Obj *objPtr));
+ * EXTERN void	TclDecrRefCount _ANSI_ARGS_((Tcl_Obj *objPtr));
+ *----------------------------------------------------------------
+ */
+
+#ifdef TCL_COMPILE_STATS
+#  define TclIncrObjsAllocated() \
+    tclObjsAlloced++
+#  define TclIncrObjsFreed() \
+    tclObjsFreed++
+#else
+#  define TclIncrObjsAllocated()
+#  define TclIncrObjsFreed()
+#endif /* TCL_COMPILE_STATS */
+
+#ifdef TCL_MEM_DEBUG
+#  define TclNewObj(objPtr) \
+    (objPtr) = (Tcl_Obj *) Tcl_DbCkalloc(sizeof(Tcl_Obj), __FILE__, __LINE__); \
+    (objPtr)->refCount = 0; \
+    (objPtr)->bytes    = tclEmptyStringRep; \
+    (objPtr)->length   = 0; \
+    (objPtr)->typePtr  = NULL; \
+    TclIncrObjsAllocated()
+#  define TclDbNewObj(objPtr, file, line) \
+    (objPtr) = (Tcl_Obj *) Tcl_DbCkalloc(sizeof(Tcl_Obj), (file), (line)); \
+    (objPtr)->refCount = 0; \
+    (objPtr)->bytes    = tclEmptyStringRep; \
+    (objPtr)->length   = 0; \
+    (objPtr)->typePtr  = NULL; \
+    TclIncrObjsAllocated()
+#  define TclDecrRefCount(objPtr) \
+    if (--(objPtr)->refCount <= 0) { \
+ 	if ((objPtr)->refCount < -1) \
+            panic("Reference count for %lx was negative: %s line %d", \
+		  (objPtr), __FILE__, __LINE__); \
+        if (((objPtr)->bytes != NULL) \
+	        && ((objPtr)->bytes != tclEmptyStringRep)) { \
+	    ckfree((char *) (objPtr)->bytes); \
+        } \
+        if (((objPtr)->typePtr != NULL) \
+	        && ((objPtr)->typePtr->freeIntRepProc != NULL)) { \
+	    (objPtr)->typePtr->freeIntRepProc(objPtr); \
+        } \
+        ckfree((char *) (objPtr)); \
+        TclIncrObjsFreed(); \
+    }
+#else /* not TCL_MEM_DEBUG */
+#  define TclNewObj(objPtr) \
+    if (tclFreeObjList == NULL) { \
+	TclAllocateFreeObjects(); \
+    } \
+    (objPtr) = tclFreeObjList; \
+    tclFreeObjList = (Tcl_Obj *) \
+	tclFreeObjList->internalRep.otherValuePtr; \
+    (objPtr)->refCount = 0; \
+    (objPtr)->bytes    = tclEmptyStringRep; \
+    (objPtr)->length   = 0; \
+    (objPtr)->typePtr  = NULL; \
+    TclIncrObjsAllocated()
+#  define TclDecrRefCount(objPtr) \
+    if (--(objPtr)->refCount <= 0) { \
+        if (((objPtr)->bytes != NULL) \
+	        && ((objPtr)->bytes != tclEmptyStringRep)) { \
+	    ckfree((char *) (objPtr)->bytes); \
+        } \
+        if (((objPtr)->typePtr != NULL) \
+	        && ((objPtr)->typePtr->freeIntRepProc != NULL)) { \
+	    (objPtr)->typePtr->freeIntRepProc(objPtr); \
+        } \
+        (objPtr)->internalRep.otherValuePtr = (VOID *) tclFreeObjList; \
+        tclFreeObjList = (objPtr); \
+        TclIncrObjsFreed(); \
+    }
+#endif /* TCL_MEM_DEBUG */
+
+/*
+ *----------------------------------------------------------------
+ * Macro used by the Tcl core to set a Tcl_Obj's string representation
+ * to a copy of the "len" bytes starting at "bytePtr". This code
+ * works even if the byte array contains NULLs as long as the length
+ * is correct. Because "len" is referenced multiple times, it should
+ * be as simple an expression as possible. The ANSI C "prototype" for
+ * this macro is:
+ *
+ * EXTERN void	TclInitStringRep _ANSI_ARGS_((Tcl_Obj *objPtr,
+ *		    char *bytePtr, int len));
+ *----------------------------------------------------------------
+ */
+
+#define TclInitStringRep(objPtr, bytePtr, len) \
+    if ((len) == 0) { \
+        (objPtr)->bytes  = tclEmptyStringRep; \
+	(objPtr)->length = 0; \
+    } else { \
+	(objPtr)->bytes = (char *) ckalloc((unsigned) ((len) + 1)); \
+	memcpy((VOID *) (objPtr)->bytes, (VOID *) (bytePtr), \
+	        (unsigned) (len)); \
+	(objPtr)->bytes[len] = '\0'; \
+	(objPtr)->length = (len); \
+    }
+
+/*
+ *----------------------------------------------------------------
+ * Macro used by the Tcl core to get the string representation's
+ * byte array pointer and length from a Tcl_Obj. This is an inline
+ * version of Tcl_GetStringFromObj(). "lengthPtr" must be the
+ * address of an integer variable or NULL; If non-NULL, that variable
+ * will be set to the string rep's length. The macro's expression
+ * result is the string rep's byte pointer which might be NULL.
+ * Note that the bytes referenced by this pointer must not be modified
+ * by the caller. The ANSI C "prototype" for this macro is:
+ *
+ * EXTERN char *  TclGetStringFromObj _ANSI_ARGS_((Tcl_Obj *objPtr,
+ *		       int *lengthPtr));
+ *----------------------------------------------------------------
+ */
+
+#define TclGetStringFromObj(objPtr, lengthPtr) \
+    ((objPtr)->bytes? \
+        ((lengthPtr)? \
+	    ((*(lengthPtr) = (objPtr)->length), (objPtr)->bytes) : \
+	    (objPtr)->bytes) : \
+        Tcl_GetStringFromObj((objPtr), (lengthPtr)))
+
+/*
+ *----------------------------------------------------------------
+ * Macro used by the Tcl core to reset an interpreter's Tcl object
+ * result to an unshared empty string object with ref count one.
+ * This does not clear any error information for the interpreter.
+ * The ANSI C "prototype" for this macro is:
+ *
+ * EXTERN void	TclResetObjResult _ANSI_ARGS_((Tcl_Interp *interp));
+ *---------------------------------------------------------------
+ */
+
+#define TclResetObjResult(interp) \
+    { \
+        register Tcl_Obj *objResultPtr = ((Interp *) interp)->objResultPtr; \
+        if (Tcl_IsShared(objResultPtr)) { \
+	    TclDecrRefCount(objResultPtr); \
+	    TclNewObj(objResultPtr); \
+	    Tcl_IncrRefCount(objResultPtr); \
+	    ((Interp *) interp)->objResultPtr = objResultPtr; \
+        } else { \
+	    if ((objResultPtr->bytes != NULL) \
+		    && (objResultPtr->bytes != tclEmptyStringRep)) { \
+	        ckfree((char *) objResultPtr->bytes); \
+	    } \
+	    objResultPtr->bytes  = tclEmptyStringRep; \
+	    objResultPtr->length = 0; \
+	    if ((objResultPtr->typePtr != NULL) \
+	            && (objResultPtr->typePtr->freeIntRepProc != NULL)) { \
+	        objResultPtr->typePtr->freeIntRepProc(objResultPtr); \
+	    } \
+	    objResultPtr->typePtr = (Tcl_ObjType *) NULL; \
+        } \
+    }
+
+/*
+ *----------------------------------------------------------------
+ * Procedures used in conjunction with Tcl namespaces. They are
+ * defined here instead of in tcl.h since they are not stable yet.
+ *----------------------------------------------------------------
+ */
+
+EXTERN int		Tcl_AppendExportList _ANSI_ARGS_((
+			    Tcl_Interp *interp, Tcl_Namespace *nsPtr,
+			    Tcl_Obj *objPtr));
+EXTERN Tcl_Namespace *	Tcl_CreateNamespace _ANSI_ARGS_((Tcl_Interp *interp,
+			    char *name, ClientData clientData,
+			    Tcl_NamespaceDeleteProc *deleteProc));
+EXTERN void		Tcl_DeleteNamespace _ANSI_ARGS_((
+			    Tcl_Namespace *nsPtr));
+EXTERN int		Tcl_Export _ANSI_ARGS_((Tcl_Interp *interp,
+			    Tcl_Namespace *nsPtr, char *pattern,
+			    int resetListFirst));
+EXTERN Tcl_Command	Tcl_FindCommand _ANSI_ARGS_((Tcl_Interp *interp,
+			    char *name, Tcl_Namespace *contextNsPtr,
+			    int flags));
+EXTERN Tcl_Namespace *	Tcl_FindNamespace _ANSI_ARGS_((Tcl_Interp *interp,
+			    char *name, Tcl_Namespace *contextNsPtr,
+			    int flags));
+EXTERN Tcl_Var		Tcl_FindNamespaceVar _ANSI_ARGS_((
+			    Tcl_Interp *interp, char *name,
+			    Tcl_Namespace *contextNsPtr, int flags));
+EXTERN int		Tcl_ForgetImport _ANSI_ARGS_((Tcl_Interp *interp,
+			    Tcl_Namespace *nsPtr, char *pattern));
+EXTERN Tcl_Command	Tcl_GetCommandFromObj _ANSI_ARGS_((
+			    Tcl_Interp *interp, Tcl_Obj *objPtr));
+EXTERN void		Tcl_GetCommandFullName _ANSI_ARGS_((
+			    Tcl_Interp *interp, Tcl_Command command,
+			    Tcl_Obj *objPtr));
+EXTERN Tcl_Namespace *	Tcl_GetCurrentNamespace _ANSI_ARGS_((
+			    Tcl_Interp *interp));
+EXTERN Tcl_Namespace *	Tcl_GetGlobalNamespace _ANSI_ARGS_((
+			    Tcl_Interp *interp));
+EXTERN void		Tcl_GetVariableFullName _ANSI_ARGS_((
+			    Tcl_Interp *interp, Tcl_Var variable,
+			    Tcl_Obj *objPtr));
+EXTERN int		Tcl_Import _ANSI_ARGS_((Tcl_Interp *interp,
+			    Tcl_Namespace *nsPtr, char *pattern,
+			    int allowOverwrite));
+EXTERN void		Tcl_PopCallFrame _ANSI_ARGS_((Tcl_Interp* interp));
+EXTERN int		Tcl_PushCallFrame _ANSI_ARGS_((Tcl_Interp* interp,
+			    Tcl_CallFrame *framePtr, Tcl_Namespace *nsPtr,
+			    int isProcCallFrame)); 
+
+#endif /* _TCLINT */
+