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 * tcl.h --
 *    This header file describes the externally-visible facilities of the
 *    Tcl interpreter.
 * Copyright (c) 1987-1994 The Regents of the University of California.
 * Copyright (c) 1993-1996 Lucent Technologies.
 * Copyright (c) 1994-1998 Sun Microsystems, Inc.
 * Copyright (c) 1998-2000 by Scriptics Corporation.
 * Copyright (c) 2002 by Kevin B. Kenny.  All rights reserved.
 * See the file "license.terms" for information on usage and redistribution of
 * this file, and for a DISCLAIMER OF ALL WARRANTIES.
 * RCS: @(#) $Id: tcl.h,v 1.247 2007/12/13 15:23:14 dgp Exp $

#ifndef _TCL
#define _TCL

 * For C++ compilers, use extern "C"

#ifdef __cplusplus
extern "C" {

 * The following defines are used to indicate the various release levels.

#define TCL_ALPHA_RELEASE     0
#define TCL_BETA_RELEASE      1
#define TCL_FINAL_RELEASE     2

 * When version numbers change here, must also go into the following files and
 * update the version numbers:
 * library/init.tcl     (1 LOC patch)
 * unix/configure.in    (2 LOC Major, 2 LOC minor, 1 LOC patch)
 * win/configure.in     (as above)
 * win/tcl.m4           (not patchlevel)
 * win/makefile.bc      (not patchlevel) 2 LOC
 * README         (sections 0 and 2, with and without separator)
 * macosx/Tcl.pbproj/project.pbxproj (not patchlevel) 1 LOC
 * macosx/Tcl.pbproj/default.pbxuser (not patchlevel) 1 LOC
 * macosx/Tcl.xcode/project.pbxproj (not patchlevel) 2 LOC
 * macosx/Tcl.xcode/default.pbxuser (not patchlevel) 1 LOC
 * macosx/Tcl-Common.xcconfig (not patchlevel) 1 LOC
 * win/README           (not patchlevel) (sections 0 and 2)
 * unix/tcl.spec  (1 LOC patch)
 * tools/tcl.hpj.in     (not patchlevel, for windows installer)
 * tools/tcl.wse.in     (for windows installer)
 * tools/tclSplash.bmp  (not patchlevel)


#define TCL_VERSION         "8.5"
#define TCL_PATCH_LEVEL     "8.5.0"

 * The following definitions set up the proper options for Windows compilers.
 * We use this method because there is no autoconf equivalent.

#ifndef __WIN32__
#   if defined(_WIN32) || defined(WIN32) || defined(__MINGW32__) || defined(__BORLANDC__) || (defined(__WATCOMC__) && defined(__WINDOWS_386__))
#     define __WIN32__
#     ifndef WIN32
#         define WIN32
#     endif
#     ifndef _WIN32
#         define _WIN32
#     endif
#   endif

 * STRICT: See MSDN Article Q83456

#ifdef __WIN32__
#   ifndef STRICT
#     define STRICT
#   endif
#endif /* __WIN32__ */

 * Utility macros: STRINGIFY takes an argument and wraps it in "" (double
 * quotation marks), JOIN joins two arguments.

#  define STRINGIFY(x) STRINGIFY1(x)
#  define STRINGIFY1(x) #x
#ifndef JOIN
#  define JOIN(a,b) JOIN1(a,b)
#  define JOIN1(a,b) a##b

 * A special definition used to allow this header file to be included from
 * windows resource files so that they can obtain version information.
 * RC_INVOKED is defined by default by the windows RC tool.
 * Resource compilers don't like all the C stuff, like typedefs and function
 * declarations, that occur below, so block them out.

#ifndef RC_INVOKED

 * Special macro to define mutexes, that doesn't do anything if we are not
 * using threads.

#define TCL_DECLARE_MUTEX(name) static Tcl_Mutex name;
#define TCL_DECLARE_MUTEX(name)

 * Tcl's public routine Tcl_FSSeek() uses the values SEEK_SET, SEEK_CUR, and
 * SEEK_END, all #define'd by stdio.h .
 * Also, many extensions need stdio.h, and they've grown accustomed to tcl.h
 * providing it for them rather than #include-ing it themselves as they
 * should, so also for their sake, we keep the #include to be consistent with
 * prior Tcl releases.

#include <stdio.h>

 * Support for functions with a variable number of arguments.
 * The following TCL_VARARGS* macros are to support old extensions
 * written for older versions of Tcl where the macros permitted
 * support for the varargs.h system as well as stdarg.h .  
 * New code should just directly be written to use stdarg.h conventions.

#include <stdarg.h>
#    define TCL_VARARGS(type, name) (type name, ...)
#    define TCL_VARARGS_DEF(type, name) (type name, ...)
#    define TCL_VARARGS_START(type, name, list) (va_start(list, name), name)

 * Macros used to declare a function to be exported by a DLL. Used by Windows,
 * maps to no-op declarations on non-Windows systems. The default build on
 * windows is for a DLL, which causes the DLLIMPORT and DLLEXPORT macros to be
 * nonempty. To build a static library, the macro STATIC_BUILD should be
 * defined.
 * Note: when building static but linking dynamically to MSVCRT we must still
 *       correctly decorate the C library imported function.  Use CRTIMPORT
 *       for this purpose.  _DLL is defined by the compiler when linking to
 *       MSVCRT.  

#if (defined(__WIN32__) && (defined(_MSC_VER) || (__BORLANDC__ >= 0x0550) || defined(__LCC__) || defined(__WATCOMC__) || (defined(__GNUC__) && defined(__declspec))))
#   define HAVE_DECLSPEC 1

#   define DLLIMPORT
#   define DLLEXPORT
#   if HAVE_DECLSPEC && defined(_DLL)
#     define CRTIMPORT __declspec(dllimport)
#   else
#     define CRTIMPORT
#   endif
#     define DLLIMPORT __declspec(dllimport)
#     define DLLEXPORT __declspec(dllexport)
#     define CRTIMPORT __declspec(dllimport)
#   else
#     define DLLIMPORT
#     define DLLEXPORT
#     define CRTIMPORT
#   endif

 * These macros are used to control whether functions are being declared for
 * import or export. If a function is being declared while it is being built
 * to be included in a shared library, then it should have the DLLEXPORT
 * storage class. If is being declared for use by a module that is going to
 * link against the shared library, then it should have the DLLIMPORT storage
 * class. If the symbol is beind declared for a static build or for use from a
 * stub library, then the storage class should be empty.
 * The convention is that a macro called BUILD_xxxx, where xxxx is the name of
 * a library we are building, is set on the compile line for sources that are
 * to be placed in the library. When this macro is set, the storage class will
 * be set to DLLEXPORT. At the end of the header file, the storage class will
 * be reset to DLLIMPORT.

#ifdef BUILD_tcl
#   ifdef USE_TCL_STUBS
#      define TCL_STORAGE_CLASS
#   else
#   endif

 * Definitions that allow this header file to be used either with or without
 * ANSI C features like function prototypes.

#undef _ANSI_ARGS_
#undef CONST
#ifndef INLINE
#   define INLINE

#ifndef NO_CONST
#   define CONST const
#   define CONST

#   define _ANSI_ARGS_(x)     x
#   define _ANSI_ARGS_(x)     ()

#      error define at most one of USE_NON_CONST and USE_COMPAT_CONST
#   endif
#   define CONST84
#   define CONST84_RETURN
#      define CONST84
#      define CONST84_RETURN CONST
#   else
#      define CONST84 CONST
#      define CONST84_RETURN CONST
#   endif

 * Make sure EXTERN isn't defined elsewhere

#ifdef EXTERN
#   undef EXTERN
#endif /* EXTERN */

#ifdef __cplusplus
#   define EXTERN extern "C" TCL_STORAGE_CLASS
#   define EXTERN extern TCL_STORAGE_CLASS

 * The following code is copied from winnt.h. If we don't replicate it here,
 * then <windows.h> can't be included after tcl.h, since tcl.h also defines
 * VOID. This block is skipped under Cygwin and Mingw.

#if defined(__WIN32__) && !defined(HAVE_WINNT_IGNORE_VOID)
#ifndef VOID
#define VOID void
typedef char CHAR;
typedef short SHORT;
typedef long LONG;
#endif /* __WIN32__ && !HAVE_WINNT_IGNORE_VOID */

 * Macro to use instead of "void" for arguments that must have type "void *"
 * in ANSI C; maps them to type "char *" in non-ANSI systems.

#ifndef NO_VOID
#define VOID      void
#define VOID      char

 * Miscellaneous declarations.

#   ifndef NO_VOID
      typedef void *ClientData;
#   else
      typedef int *ClientData;
#   endif
#   define _CLIENTDATA

 * Darwin specifc configure overrides (to support fat compiles, where
 * configure runs only once for multiple architectures):

#ifdef __APPLE__
#   ifdef __LP64__
#     undef TCL_WIDE_INT_TYPE
#     define TCL_WIDE_INT_IS_LONG 1
#     define TCL_CFG_DO64BIT 1
#    else /* !__LP64__ */
#     define TCL_WIDE_INT_TYPE long long
#     undef TCL_WIDE_INT_IS_LONG
#     undef TCL_CFG_DO64BIT
#    endif /* __LP64__ */
#    undef HAVE_STRUCT_STAT64
#endif /* __APPLE__ */

 * Define Tcl_WideInt to be a type that is (at least) 64-bits wide, and define
 * Tcl_WideUInt to be the unsigned variant of that type (assuming that where
 * we have one, we can have the other.)
 * Also defines the following macros:
 * TCL_WIDE_INT_IS_LONG - if wide ints are really longs (i.e. we're on a real
 *    64-bit system.)
 * Tcl_WideAsLong - forgetful converter from wideInt to long.
 * Tcl_LongAsWide - sign-extending converter from long to wideInt.
 * Tcl_WideAsDouble - converter from wideInt to double.
 * Tcl_DoubleAsWide - converter from double to wideInt.
 * The following invariant should hold for any long value 'longVal':
 *    longVal == Tcl_WideAsLong(Tcl_LongAsWide(longVal))
 * Note on converting between Tcl_WideInt and strings. This implementation (in
 * tclObj.c) depends on the function
 * sprintf(...,"%" TCL_LL_MODIFIER "d",...).

#if !defined(TCL_WIDE_INT_TYPE)&&!defined(TCL_WIDE_INT_IS_LONG)
#   if defined(__GNUC__)
#      define TCL_WIDE_INT_TYPE long long
#      if defined(__WIN32__) && !defined(__CYGWIN__)
#         define TCL_LL_MODIFIER        "I64"
#      else
#         define TCL_LL_MODIFIER    "L"
#      endif
typedef struct stat     Tcl_StatBuf;
#   elif defined(__WIN32__)
#      define TCL_WIDE_INT_TYPE __int64
#      ifdef __BORLANDC__
typedef struct stati64 Tcl_StatBuf;
#         define TCL_LL_MODIFIER    "L"
#      else /* __BORLANDC__ */
#         if _MSC_VER < 1400 || !defined(_M_IX86)
typedef struct _stati64 Tcl_StatBuf;
#         else
typedef struct _stat64  Tcl_StatBuf;
#         endif /* _MSC_VER < 1400 */
#         define TCL_LL_MODIFIER    "I64"
#      endif /* __BORLANDC__ */
#   else /* __WIN32__ */
 * Don't know what platform it is and configure hasn't discovered what is
 * going on for us. Try to guess...
#      ifdef NO_LIMITS_H
#       error please define either TCL_WIDE_INT_TYPE or TCL_WIDE_INT_IS_LONG
#      else /* !NO_LIMITS_H */
#       include <limits.h>
#       if (INT_MAX < LONG_MAX)
#          define TCL_WIDE_INT_IS_LONG    1
#       else
#          define TCL_WIDE_INT_TYPE long long
#         endif
#      endif /* NO_LIMITS_H */
#   endif /* __WIN32__ */
#   define TCL_WIDE_INT_TYPE  long
#endif /* TCL_WIDE_INT_IS_LONG */

typedef TCL_WIDE_INT_TYPE           Tcl_WideInt;
typedef unsigned TCL_WIDE_INT_TYPE  Tcl_WideUInt;

typedef struct stat     Tcl_StatBuf;
#   define Tcl_WideAsLong(val)            ((long)(val))
#   define Tcl_LongAsWide(val)            ((long)(val))
#   define Tcl_WideAsDouble(val)    ((double)((long)(val)))
#   define Tcl_DoubleAsWide(val)    ((long)((double)(val)))
#   ifndef TCL_LL_MODIFIER
#      define TCL_LL_MODIFIER       "l"
#   endif /* !TCL_LL_MODIFIER */
#else /* TCL_WIDE_INT_IS_LONG */
 * The next short section of defines are only done when not running on Windows
 * or some other strange platform.
#   ifndef TCL_LL_MODIFIER
#      ifdef HAVE_STRUCT_STAT64
typedef struct stat64   Tcl_StatBuf;
#      else
typedef struct stat     Tcl_StatBuf;
#      endif /* HAVE_STRUCT_STAT64 */
#      define TCL_LL_MODIFIER       "ll"
#   endif /* !TCL_LL_MODIFIER */
#   define Tcl_WideAsLong(val)            ((long)((Tcl_WideInt)(val)))
#   define Tcl_LongAsWide(val)            ((Tcl_WideInt)((long)(val)))
#   define Tcl_WideAsDouble(val)    ((double)((Tcl_WideInt)(val)))
#   define Tcl_DoubleAsWide(val)    ((Tcl_WideInt)((double)(val)))
#endif /* TCL_WIDE_INT_IS_LONG */

 * Data structures defined opaquely in this module. The definitions below just
 * provide dummy types. A few fields are made visible in Tcl_Interp
 * structures, namely those used for returning a string result from commands.
 * Direct access to the result field is discouraged in Tcl 8.0. The
 * interpreter result is either an object or a string, and the two values are
 * kept consistent unless some C code sets interp->result directly.
 * Programmers should use either the function Tcl_GetObjResult() or
 * Tcl_GetStringResult() to read the interpreter's result. See the SetResult
 * man page for details.
 * Note: any change to the Tcl_Interp definition below must be mirrored in the
 * "real" definition in tclInt.h.
 * Note: Tcl_ObjCmdProc functions do not directly set result and freeProc.
 * Instead, they set a Tcl_Obj member in the "real" structure that can be
 * accessed with Tcl_GetObjResult() and Tcl_SetObjResult().

typedef struct Tcl_Interp {
    char *result;       /* If the last command returned a string
                         * result, this points to it. */
    void (*freeProc) _ANSI_ARGS_((char *blockPtr));
                        /* Zero means the string result is statically
                         * allocated. TCL_DYNAMIC means it was
                         * allocated with ckalloc and should be freed
                         * with ckfree. Other values give the address
                         * of function to invoke to free the result.
                         * Tcl_Eval must free it before executing next
                         * command. */
    int errorLine;            /* When TCL_ERROR is returned, this gives the
                         * line number within the command where the
                         * error occurred (1 if first line). */
} Tcl_Interp;

typedef struct Tcl_AsyncHandler_ *Tcl_AsyncHandler;
typedef struct Tcl_Channel_ *Tcl_Channel;
typedef struct Tcl_ChannelTypeVersion_ *Tcl_ChannelTypeVersion;
typedef struct Tcl_Command_ *Tcl_Command;
typedef struct Tcl_Condition_ *Tcl_Condition;
typedef struct Tcl_Dict_ *Tcl_Dict;
typedef struct Tcl_EncodingState_ *Tcl_EncodingState;
typedef struct Tcl_Encoding_ *Tcl_Encoding;
typedef struct Tcl_Event Tcl_Event;
typedef struct Tcl_InterpState_ *Tcl_InterpState;
typedef struct Tcl_LoadHandle_ *Tcl_LoadHandle;
typedef struct Tcl_Mutex_ *Tcl_Mutex;
typedef struct Tcl_Pid_ *Tcl_Pid;
typedef struct Tcl_RegExp_ *Tcl_RegExp;
typedef struct Tcl_ThreadDataKey_ *Tcl_ThreadDataKey;
typedef struct Tcl_ThreadId_ *Tcl_ThreadId;
typedef struct Tcl_TimerToken_ *Tcl_TimerToken;
typedef struct Tcl_Trace_ *Tcl_Trace;
typedef struct Tcl_Var_ *Tcl_Var;

 * Definition of the interface to functions implementing threads. A function
 * following this definition is given to each call of 'Tcl_CreateThread' and
 * will be called as the main fuction of the new thread created by that call.

#if defined __WIN32__
typedef unsigned (__stdcall Tcl_ThreadCreateProc) _ANSI_ARGS_((ClientData clientData));
typedef void (Tcl_ThreadCreateProc) _ANSI_ARGS_((ClientData clientData));

 * Threading function return types used for abstracting away platform
 * differences when writing a Tcl_ThreadCreateProc. See the NewThread function
 * in generic/tclThreadTest.c for it's usage.

#if defined __WIN32__
#   define Tcl_ThreadCreateType           unsigned __stdcall
#   define TCL_THREAD_CREATE_RETURN return 0
#   define Tcl_ThreadCreateType           void

 * Definition of values for default stacksize and the possible flags to be
 * given to Tcl_CreateThread.

#define TCL_THREAD_STACK_DEFAULT (0)    /* Use default size for stack */
#define TCL_THREAD_NOFLAGS     (0000) /* Standard flags, default behaviour */
#define TCL_THREAD_JOINABLE    (0001) /* Mark the thread as joinable */

 * Flag values passed to Tcl_StringCaseMatch.

#define TCL_MATCH_NOCASE      (1<<0)

 * Flag values passed to Tcl_GetRegExpFromObj.

#define     TCL_REG_BASIC           000000      /* BREs (convenience) */
#define     TCL_REG_EXTENDED  000001      /* EREs */
#define     TCL_REG_ADVF            000002      /* advanced features in EREs */
#define     TCL_REG_ADVANCED  000003      /* AREs (which are also EREs) */
#define     TCL_REG_QUOTE           000004      /* no special characters, none */
#define     TCL_REG_NOCASE          000010      /* ignore case */
#define     TCL_REG_NOSUB           000020      /* don't care about subexpressions */
#define     TCL_REG_EXPANDED  000040      /* expanded format, white space &
                               * comments */
#define     TCL_REG_NLSTOP          000100  /* \n doesn't match . or [^ ] */
#define     TCL_REG_NLANCH          000200  /* ^ matches after \n, $ before */
#define     TCL_REG_NEWLINE         000300  /* newlines are line terminators */
#define     TCL_REG_CANMATCH  001000  /* report details on partial/limited
                               * matches */

 * Flags values passed to Tcl_RegExpExecObj.

#define     TCL_REG_NOTBOL    0001  /* Beginning of string does not match ^.  */
#define     TCL_REG_NOTEOL    0002  /* End of string does not match $. */

 * Structures filled in by Tcl_RegExpInfo. Note that all offset values are
 * relative to the start of the match string, not the beginning of the entire
 * string.

typedef struct Tcl_RegExpIndices {
    long start;               /* Character offset of first character in
                         * match. */
    long end;                 /* Character offset of first character after
                         * the match. */
} Tcl_RegExpIndices;

typedef struct Tcl_RegExpInfo {
    int nsubs;                /* Number of subexpressions in the compiled
                         * expression. */
    Tcl_RegExpIndices *matches;     /* Array of nsubs match offset pairs. */
    long extendStart;         /* The offset at which a subsequent match
                         * might begin. */
    long reserved;            /* Reserved for later use. */
} Tcl_RegExpInfo;

 * Picky compilers complain if this typdef doesn't appear before the struct's
 * reference in tclDecls.h.

typedef Tcl_StatBuf *Tcl_Stat_;
typedef struct stat *Tcl_OldStat_;

 * When a TCL command returns, the interpreter contains a result from the
 * command. Programmers are strongly encouraged to use one of the functions
 * Tcl_GetObjResult() or Tcl_GetStringResult() to read the interpreter's
 * result. See the SetResult man page for details. Besides this result, the
 * command function returns an integer code, which is one of the following:
 * TCL_OK         Command completed normally; the interpreter's result
 *                contains the command's result.
 * TCL_ERROR            The command couldn't be completed successfully; the
 *                interpreter's result describes what went wrong.
 * TCL_RETURN           The command requests that the current function return;
 *                the interpreter's result contains the function's
 *                return value.
 * TCL_BREAK            The command requests that the innermost loop be
 *                exited; the interpreter's result is meaningless.
 * TCL_CONTINUE         Go on to the next iteration of the current loop; the
 *                interpreter's result is meaningless.

#define TCL_OK          0
#define TCL_ERROR 1
#define TCL_RETURN      2
#define TCL_BREAK 3
#define TCL_CONTINUE    4

#define TCL_RESULT_SIZE 200

 * Flags to control what substitutions are performed by Tcl_SubstObj():

#define TCL_SUBST_COMMANDS    001
#define TCL_SUBST_ALL         007

 * Argument descriptors for math function callbacks in expressions:

typedef enum {
} Tcl_ValueType;

typedef struct Tcl_Value {
    Tcl_ValueType type;       /* Indicates intValue or doubleValue is valid,
                         * or both. */
    long intValue;            /* Integer value. */
    double doubleValue;       /* Double-precision floating value. */
    Tcl_WideInt wideValue;    /* Wide (min. 64-bit) integer value. */
} Tcl_Value;

 * Forward declaration of Tcl_Obj to prevent an error when the forward
 * reference to Tcl_Obj is encountered in the function types declared below.

struct Tcl_Obj;

 * Function types defined by Tcl:

typedef int (Tcl_AppInitProc) _ANSI_ARGS_((Tcl_Interp *interp));
typedef int (Tcl_AsyncProc) _ANSI_ARGS_((ClientData clientData,
      Tcl_Interp *interp, int code));
typedef void (Tcl_ChannelProc) _ANSI_ARGS_((ClientData clientData, int mask));
typedef void (Tcl_CloseProc) _ANSI_ARGS_((ClientData data));
typedef void (Tcl_CmdDeleteProc) _ANSI_ARGS_((ClientData clientData));
typedef int (Tcl_CmdProc) _ANSI_ARGS_((ClientData clientData,
      Tcl_Interp *interp, int argc, CONST84 char *argv[]));
typedef void (Tcl_CmdTraceProc) _ANSI_ARGS_((ClientData clientData,
      Tcl_Interp *interp, int level, char *command, Tcl_CmdProc *proc,
      ClientData cmdClientData, int argc, CONST84 char *argv[]));
typedef int (Tcl_CmdObjTraceProc) _ANSI_ARGS_((ClientData clientData,
      Tcl_Interp *interp, int level, CONST char *command,
      Tcl_Command commandInfo, int objc, struct Tcl_Obj * CONST * objv));
typedef void (Tcl_CmdObjTraceDeleteProc) _ANSI_ARGS_((ClientData clientData));
typedef void (Tcl_DupInternalRepProc) _ANSI_ARGS_((struct Tcl_Obj *srcPtr,
      struct Tcl_Obj *dupPtr));
typedef int (Tcl_EncodingConvertProc)_ANSI_ARGS_((ClientData clientData,
      CONST char *src, int srcLen, int flags, Tcl_EncodingState *statePtr,
      char *dst, int dstLen, int *srcReadPtr, int *dstWrotePtr,
      int *dstCharsPtr));
typedef void (Tcl_EncodingFreeProc)_ANSI_ARGS_((ClientData clientData));
typedef int (Tcl_EventProc) _ANSI_ARGS_((Tcl_Event *evPtr, int flags));
typedef void (Tcl_EventCheckProc) _ANSI_ARGS_((ClientData clientData,
      int flags));
typedef int (Tcl_EventDeleteProc) _ANSI_ARGS_((Tcl_Event *evPtr,
      ClientData clientData));
typedef void (Tcl_EventSetupProc) _ANSI_ARGS_((ClientData clientData,
      int flags));
typedef void (Tcl_ExitProc) _ANSI_ARGS_((ClientData clientData));
typedef void (Tcl_FileProc) _ANSI_ARGS_((ClientData clientData, int mask));
typedef void (Tcl_FileFreeProc) _ANSI_ARGS_((ClientData clientData));
typedef void (Tcl_FreeInternalRepProc) _ANSI_ARGS_((struct Tcl_Obj *objPtr));
typedef void (Tcl_FreeProc) _ANSI_ARGS_((char *blockPtr));
typedef void (Tcl_IdleProc) _ANSI_ARGS_((ClientData clientData));
typedef void (Tcl_InterpDeleteProc) _ANSI_ARGS_((ClientData clientData,
      Tcl_Interp *interp));
typedef int (Tcl_MathProc) _ANSI_ARGS_((ClientData clientData,
      Tcl_Interp *interp, Tcl_Value *args, Tcl_Value *resultPtr));
typedef void (Tcl_NamespaceDeleteProc) _ANSI_ARGS_((ClientData clientData));
typedef int (Tcl_ObjCmdProc) _ANSI_ARGS_((ClientData clientData,
      Tcl_Interp *interp, int objc, struct Tcl_Obj * CONST * objv));
typedef int (Tcl_PackageInitProc) _ANSI_ARGS_((Tcl_Interp *interp));
typedef int (Tcl_PackageUnloadProc) _ANSI_ARGS_((Tcl_Interp *interp,
      int flags));
typedef void (Tcl_PanicProc) _ANSI_ARGS_((CONST char *format, ...));
typedef void (Tcl_TcpAcceptProc) _ANSI_ARGS_((ClientData callbackData,
      Tcl_Channel chan, char *address, int port));
typedef void (Tcl_TimerProc) _ANSI_ARGS_((ClientData clientData));
typedef int (Tcl_SetFromAnyProc) _ANSI_ARGS_((Tcl_Interp *interp,
      struct Tcl_Obj *objPtr));
typedef void (Tcl_UpdateStringProc) _ANSI_ARGS_((struct Tcl_Obj *objPtr));
typedef char *(Tcl_VarTraceProc) _ANSI_ARGS_((ClientData clientData,
      Tcl_Interp *interp, CONST84 char *part1, CONST84 char *part2,
      int flags));
typedef void (Tcl_CommandTraceProc) _ANSI_ARGS_((ClientData clientData,
      Tcl_Interp *interp, CONST char *oldName, CONST char *newName,
      int flags));
typedef void (Tcl_CreateFileHandlerProc) _ANSI_ARGS_((int fd, int mask,
      Tcl_FileProc *proc, ClientData clientData));
typedef void (Tcl_DeleteFileHandlerProc) _ANSI_ARGS_((int fd));
typedef void (Tcl_AlertNotifierProc) _ANSI_ARGS_((ClientData clientData));
typedef void (Tcl_ServiceModeHookProc) _ANSI_ARGS_((int mode));
typedef ClientData (Tcl_InitNotifierProc) _ANSI_ARGS_((VOID));
typedef void (Tcl_FinalizeNotifierProc) _ANSI_ARGS_((ClientData clientData));
typedef void (Tcl_MainLoopProc) _ANSI_ARGS_((void));

 * The following structure represents a type of object, which is a particular
 * internal representation for an object plus a set of functions that provide
 * standard operations on objects of that type.

typedef struct Tcl_ObjType {
    char *name;               /* Name of the type, e.g. "int". */
    Tcl_FreeInternalRepProc *freeIntRepProc;
                        /* Called to free any storage for the type's
                         * internal rep. NULL if the internal rep does
                         * not need freeing. */
    Tcl_DupInternalRepProc *dupIntRepProc;
                        /* Called to create a new object as a copy of
                         * an existing object. */
    Tcl_UpdateStringProc *updateStringProc;
                        /* Called to update the string rep from the
                         * type's internal representation. */
    Tcl_SetFromAnyProc *setFromAnyProc;
                        /* Called to convert the object's internal rep
                         * to this type. Frees the internal rep of the
                         * old type. Returns TCL_ERROR on failure. */
} Tcl_ObjType;

 * One of the following structures exists for each object in the Tcl system.
 * An object stores a value as either a string, some internal representation,
 * or both.

typedef struct Tcl_Obj {
    int refCount;       /* When 0 the object will be freed. */
    char *bytes;        /* This points to the first byte of the
                         * object's string representation. The array
                         * must be followed by a null byte (i.e., at
                         * offset length) but may also contain
                         * embedded null characters. The array's
                         * storage is allocated by ckalloc. NULL means
                         * the string rep is invalid and must be
                         * regenerated from the internal rep.  Clients
                         * should use Tcl_GetStringFromObj or
                         * Tcl_GetString to get a pointer to the byte
                         * array as a readonly value. */
    int length;               /* The number of bytes at *bytes, not
                         * including the terminating null. */
    Tcl_ObjType *typePtr;     /* Denotes the object's type. Always
                         * corresponds to the type of the object's
                         * internal rep. NULL indicates the object has
                         * no internal rep (has no type). */
    union {             /* The internal representation: */
      long longValue;         /*   - an long integer value */
      double doubleValue;     /*   - a double-precision floating value */
      VOID *otherValuePtr;    /*   - another, type-specific value */
      Tcl_WideInt wideValue;  /*   - a long long value */
      struct {          /*   - internal rep as two pointers */
          VOID *ptr1;
          VOID *ptr2;
      } twoPtrValue;
      struct {          /*   - internal rep as a wide int, tightly
                         *     packed fields */
          VOID *ptr;          /* Pointer to digits */
          unsigned long value;/* Alloc, used, and signum packed into a
                         * single word */
      } ptrAndLongRep;
    } internalRep;
} Tcl_Obj;

 * Macros to increment and decrement a Tcl_Obj's reference count, and to test
 * whether an object is shared (i.e. has reference count > 1). Note: clients
 * should use Tcl_DecrRefCount() when they are finished using an object, and
 * should never call TclFreeObj() directly. TclFreeObj() is only defined and
 * made public in tcl.h to support Tcl_DecrRefCount's macro definition. Note
 * also that Tcl_DecrRefCount() refers to the parameter "obj" twice. This
 * means that you should avoid calling it with an expression that is expensive
 * to compute or has side effects.

void        Tcl_IncrRefCount _ANSI_ARGS_((Tcl_Obj *objPtr));
void        Tcl_DecrRefCount _ANSI_ARGS_((Tcl_Obj *objPtr));
int         Tcl_IsShared _ANSI_ARGS_((Tcl_Obj *objPtr));

 * The following structure contains the state needed by Tcl_SaveResult. No-one
 * outside of Tcl should access any of these fields. This structure is
 * typically allocated on the stack.

typedef struct Tcl_SavedResult {
    char *result;
    Tcl_FreeProc *freeProc;
    Tcl_Obj *objResultPtr;
    char *appendResult;
    int appendAvl;
    int appendUsed;
    char resultSpace[TCL_RESULT_SIZE+1];
} Tcl_SavedResult;

 * The following definitions support Tcl's namespace facility. Note: the first
 * five fields must match exactly the fields in a Namespace structure (see
 * tclInt.h).

typedef struct Tcl_Namespace {
    char *name;               /* The namespace's name within its parent
                         * namespace. 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;    /* Arbitrary value associated with this
                         * namespace. */
    Tcl_NamespaceDeleteProc* deleteProc;
                        /* Function invoked when deleting the
                         * namespace to, e.g., free clientData. */
    struct Tcl_Namespace* parentPtr;
                        /* Points to the namespace that contains this
                         * one. NULL if this is the global
                         * namespace. */
} Tcl_Namespace;

 * The following structure represents a call frame, or activation record. A
 * call frame defines a naming context for a procedure call: its local scope
 * (for local variables) and its namespace scope (used for non-local
 * variables; often 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 Tcl call stack.
 * A call frame is initialized and pushed using Tcl_PushCallFrame and popped
 * using Tcl_PopCallFrame. Storage for a Tcl_CallFrame must be provided by the
 * Tcl_PushCallFrame caller, and callers typically allocate them on the C call
 * stack for efficiency. For this reason, Tcl_CallFrame is defined as a
 * structure and not as an opaque token. However, most Tcl_CallFrame fields
 * are hidden since applications should not access them directly; others are
 * declared as "dummyX".
 * WARNING!! The structure definition must be kept consistent with the
 * CallFrame structure in tclInt.h. If you change one, change the other.

typedef struct Tcl_CallFrame {
    Tcl_Namespace *nsPtr;
    int dummy1;
    int dummy2;
    char *dummy3;
    char *dummy4;
    char *dummy5;
    int dummy6;
    char *dummy7;
    char *dummy8;
    int dummy9;
    char *dummy10;
    char *dummy11;
    char *dummy12;
} Tcl_CallFrame;

 * Information about commands that is returned by Tcl_GetCommandInfo and
 * passed to Tcl_SetCommandInfo. objProc is an objc/objv object-based command
 * function while proc is a traditional Tcl argc/argv string-based function.
 * Tcl_CreateObjCommand and Tcl_CreateCommand ensure that both objProc and
 * proc are non-NULL and can be called to execute the command. However, it may
 * be faster to call one instead of the other. The member isNativeObjectProc
 * is set to 1 if an object-based function was registered by
 * Tcl_CreateObjCommand, and to 0 if a string-based function was registered by
 * Tcl_CreateCommand. The other function is typically set to a compatibility
 * wrapper that does string-to-object or object-to-string argument conversions
 * then calls the other function.

typedef struct Tcl_CmdInfo {
    int isNativeObjectProc;   /* 1 if objProc was registered by a call to
                         * Tcl_CreateObjCommand; 0 otherwise.
                         * Tcl_SetCmdInfo does not modify this
                         * field. */
    Tcl_ObjCmdProc *objProc;  /* Command's object-based function. */
    ClientData objClientData; /* ClientData for object proc. */
    Tcl_CmdProc *proc;        /* Command's string-based function. */
    ClientData clientData;    /* ClientData for string proc. */
    Tcl_CmdDeleteProc *deleteProc;
                        /* Function to call when command is
                         * deleted. */
    ClientData deleteData;    /* Value to pass to deleteProc (usually the
                         * same as clientData). */
    Tcl_Namespace *namespacePtr;/* Points to the namespace that contains this
                         * command. Note that Tcl_SetCmdInfo will not
                         * change a command's namespace; use
                         * TclRenameCommand or Tcl_Eval (of 'rename')
                         * to do that. */
} Tcl_CmdInfo;

 * The structure defined below is used to hold dynamic strings. The only
 * fields that clients should use are string and length, accessible via the
 * macros Tcl_DStringValue and Tcl_DStringLength.

typedef struct Tcl_DString {
    char *string;       /* Points to beginning of string: either
                         * staticSpace below or a malloced array. */
    int length;               /* Number of non-NULL characters in the
                         * string. */
    int spaceAvl;       /* Total number of bytes available for the
                         * string and its terminating NULL char. */
    char staticSpace[TCL_DSTRING_STATIC_SIZE];
                        /* Space to use in common case where string is
                         * small. */
} Tcl_DString;

#define Tcl_DStringLength(dsPtr) ((dsPtr)->length)
#define Tcl_DStringValue(dsPtr) ((dsPtr)->string)
#define Tcl_DStringTrunc Tcl_DStringSetLength

 * Definitions for the maximum number of digits of precision that may be
 * specified in the "tcl_precision" variable, and the number of bytes of
 * buffer space required by Tcl_PrintDouble.

#define TCL_MAX_PREC 17

 * Definition for a number of bytes of buffer space sufficient to hold the
 * string representation of an integer in base 10 (assuming the existence of
 * 64-bit integers).

#define TCL_INTEGER_SPACE     24

 * Flag values passed to Tcl_ConvertElement.
 * TCL_DONT_USE_BRACES forces it not to enclose the element in braces, but to
 *    use backslash quoting instead.
 * TCL_DONT_QUOTE_HASH disables the default quoting of the '#' character. It
 *    is safe to leave the hash unquoted when the element is not the first
 *    element of a list, and this flag can be used by the caller to indicate
 *    that condition.
 * (Careful! If you change these flag values be sure to change the definitions
 * at the front of tclUtil.c).


 * Flag that may be passed to Tcl_GetIndexFromObj to force it to disallow
 * abbreviated strings.

#define TCL_EXACT 1

 * Flag values passed to Tcl_RecordAndEval, Tcl_EvalObj, Tcl_EvalObjv.
 * WARNING: these bit choices must not conflict with the bit choices for
 * evalFlag bits in tclInt.h!
 * Meanings:
 *    TCL_NO_EVAL:            Just record this command
 *    TCL_EVAL_GLOBAL:  Execute script in global namespace
 *    TCL_EVAL_DIRECT:  Do not compile this script
 *    TCL_EVAL_INVOKE:  Magical Tcl_EvalObjv mode for aliases/ensembles
 *                      o Run in iPtr->lookupNsPtr or global namespace
 *                      o Cut out of error traces
 *                      o Don't reset the flags controlling ensemble
 *                        error message rewriting.
#define TCL_NO_EVAL           0x10000
#define TCL_EVAL_GLOBAL       0x20000
#define TCL_EVAL_DIRECT       0x40000
#define TCL_EVAL_INVOKE       0x80000

 * Special freeProc values that may be passed to Tcl_SetResult (see the man
 * page for details):

#define TCL_VOLATILE    ((Tcl_FreeProc *) 1)
#define TCL_STATIC      ((Tcl_FreeProc *) 0)
#define TCL_DYNAMIC     ((Tcl_FreeProc *) 3)

 * Flag values passed to variable-related functions.

#define TCL_GLOBAL_ONLY        1
#define TCL_NAMESPACE_ONLY     2
#define TCL_APPEND_VALUE       4
#define TCL_LIST_ELEMENT       8
#define TCL_TRACE_READS        0x10
#define TCL_TRACE_WRITES       0x20
#define TCL_TRACE_UNSETS       0x40
#define TCL_TRACE_DESTROYED    0x80
#define TCL_INTERP_DESTROYED   0x100
#define TCL_LEAVE_ERR_MSG      0x200
#define TCL_TRACE_ARRAY        0x800
/* Required to support old variable/vdelete/vinfo traces */
#define TCL_TRACE_OLD_STYLE    0x1000
/* Indicate the semantics of the result of a trace */
#define TCL_TRACE_RESULT_OBJECT  0x10000

 * Flag values for ensemble commands.

#define TCL_ENSEMBLE_PREFIX 0x02/* Flag value to say whether to allow
                         * unambiguous prefixes of commands or to
                         * require exact matches for command names. */

 * Flag values passed to command-related functions.

#define TCL_TRACE_RENAME 0x2000
#define TCL_TRACE_DELETE 0x4000


 * The TCL_PARSE_PART1 flag is deprecated and has no effect. The part1 is now
 * always parsed whenever the part2 is NULL. (This is to avoid a common error
 * when converting code to use the new object based APIs and forgetting to
 * give the flag)

#   define TCL_PARSE_PART1    0x400

 * Types for linked variables:

#define TCL_LINK_INT          1
#define TCL_LINK_DOUBLE       2
#define TCL_LINK_BOOLEAN      3
#define TCL_LINK_STRING       4
#define TCL_LINK_WIDE_INT     5
#define TCL_LINK_CHAR         6
#define TCL_LINK_UCHAR        7
#define TCL_LINK_SHORT        8
#define TCL_LINK_USHORT       9
#define TCL_LINK_UINT         10
#define TCL_LINK_LONG         11
#define TCL_LINK_ULONG        12
#define TCL_LINK_FLOAT        13
#define TCL_LINK_WIDE_UINT    14
#define TCL_LINK_READ_ONLY    0x80

 * Forward declarations of Tcl_HashTable and related types.

typedef struct Tcl_HashKeyType Tcl_HashKeyType;
typedef struct Tcl_HashTable Tcl_HashTable;
typedef struct Tcl_HashEntry Tcl_HashEntry;

typedef unsigned int (Tcl_HashKeyProc) _ANSI_ARGS_((Tcl_HashTable *tablePtr,
      VOID *keyPtr));
typedef int (Tcl_CompareHashKeysProc) _ANSI_ARGS_((VOID *keyPtr,
      Tcl_HashEntry *hPtr));
typedef Tcl_HashEntry *(Tcl_AllocHashEntryProc) _ANSI_ARGS_((
      Tcl_HashTable *tablePtr, VOID *keyPtr));
typedef void (Tcl_FreeHashEntryProc) _ANSI_ARGS_((Tcl_HashEntry *hPtr));

 * This flag controls whether the hash table stores the hash of a key, or
 * recalculates it. There should be no reason for turning this flag off as it
 * is completely binary and source compatible unless you directly access the
 * bucketPtr member of the Tcl_HashTableEntry structure. This member has been
 * removed and the space used to store the hash value.


 * Structure definition for an entry in a hash table. No-one outside Tcl
 * should access any of these fields directly; use the macros defined below.

struct Tcl_HashEntry {
    Tcl_HashEntry *nextPtr;   /* Pointer to next entry in this hash bucket,
                         * or NULL for end of chain. */
    Tcl_HashTable *tablePtr;  /* Pointer to table containing entry. */
    VOID *hash;               /* Hash value, stored as pointer to ensure
                         * that the offsets of the fields in this
                         * structure are not changed. */
    Tcl_HashEntry **bucketPtr;      /* Pointer to bucket that points to first
                         * entry in this entry's chain: used for
                         * deleting the entry. */
    ClientData clientData;    /* Application stores something here with
                         * Tcl_SetHashValue. */
    union {             /* Key has one of these forms: */
      char *oneWordValue;     /* One-word value for key. */
      Tcl_Obj *objPtr;  /* Tcl_Obj * key value. */
      int words[1];           /* Multiple integer words for key. The actual
                         * size will be as large as necessary for this
                         * table's keys. */
      char string[4];         /* String for key. The actual size will be as
                         * large as needed to hold the key. */
    } key;              /* MUST BE LAST FIELD IN RECORD!! */

 * Flags used in Tcl_HashKeyType.
 *                      There are some things, pointers for example
 *                      which don't hash well because they do not use
 *                      the lower bits. If this flag is set then the
 *                      hash table will attempt to rectify this by
 *                      randomising the bits and then using the upper
 *                      N bits as the index into the table.
 * TCL_HASH_KEY_SYSTEM_HASH - If this flag is set then all memory internally
 *                              allocated for the hash table that is not for an
 *                              entry will use the system heap.


 * Structure definition for the methods associated with a hash table key type.

struct Tcl_HashKeyType {
    int version;        /* Version of the table. If this structure is
                         * extended in future then the version can be
                         * used to distinguish between different
                         * structures. */
    int flags;                /* Flags, see above for details. */
    Tcl_HashKeyProc *hashKeyProc;
                        /* Calculates a hash value for the key. If
                         * this is NULL then the pointer itself is
                         * used as a hash value. */
    Tcl_CompareHashKeysProc *compareKeysProc;
                        /* Compares two keys and returns zero if they
                         * do not match, and non-zero if they do. If
                         * this is NULL then the pointers are
                         * compared. */
    Tcl_AllocHashEntryProc *allocEntryProc;
                        /* Called to allocate memory for a new entry,
                         * i.e. if the key is a string then this could
                         * allocate a single block which contains
                         * enough space for both the entry and the
                         * string. Only the key field of the allocated
                         * Tcl_HashEntry structure needs to be filled
                         * in. If something else needs to be done to
                         * the key, i.e. incrementing a reference
                         * count then that should be done by this
                         * function. If this is NULL then Tcl_Alloc is
                         * used to allocate enough space for a
                         * Tcl_HashEntry and the key pointer is
                         * assigned to key.oneWordValue. */
    Tcl_FreeHashEntryProc *freeEntryProc;
                        /* Called to free memory associated with an
                         * entry. If something else needs to be done
                         * to the key, i.e. decrementing a reference
                         * count then that should be done by this
                         * function. If this is NULL then Tcl_Free is
                         * used to free the Tcl_HashEntry. */

 * Structure definition for a hash table.  Must be in tcl.h so clients can
 * allocate space for these structures, but clients should never access any
 * fields in this structure.

struct Tcl_HashTable {
    Tcl_HashEntry **buckets;  /* Pointer to bucket array. Each element
                         * points to first entry in bucket's hash
                         * chain, or NULL. */
    Tcl_HashEntry *staticBuckets[TCL_SMALL_HASH_TABLE];
                        /* Bucket array used for small tables (to
                         * avoid mallocs and frees). */
    int numBuckets;           /* Total number of buckets allocated at
                         * **bucketPtr. */
    int numEntries;           /* Total number of entries present in
                         * table. */
    int rebuildSize;          /* Enlarge table when numEntries gets to be
                         * this large. */
    int downShift;            /* Shift count used in hashing function.
                         * Designed to use high-order bits of
                         * randomized keys. */
    int mask;                 /* Mask value used in hashing function. */
    int keyType;        /* Type of keys used in this table. It's
                         * either TCL_CUSTOM_KEYS, TCL_STRING_KEYS,
                         * TCL_ONE_WORD_KEYS, or an integer giving the
                         * number of ints that is the size of the
                         * key. */
    Tcl_HashEntry *(*findProc) _ANSI_ARGS_((Tcl_HashTable *tablePtr,
          CONST char *key));
    Tcl_HashEntry *(*createProc) _ANSI_ARGS_((Tcl_HashTable *tablePtr,
          CONST char *key, int *newPtr));
    Tcl_HashKeyType *typePtr; /* Type of the keys used in the
                         * Tcl_HashTable. */

 * Structure definition for information used to keep track of searches through
 * hash tables:

typedef struct Tcl_HashSearch {
    Tcl_HashTable *tablePtr;  /* Table being searched. */
    int nextIndex;            /* Index of next bucket to be enumerated after
                         * present one. */
    Tcl_HashEntry *nextEntryPtr;/* Next entry to be enumerated in the current
                         * bucket. */
} Tcl_HashSearch;

 * Acceptable key types for hash tables:
 * TCL_STRING_KEYS:           The keys are strings, they are copied into the
 *                      entry.
 * TCL_ONE_WORD_KEYS:         The keys are pointers, the pointer is stored
 *                      in the entry.
 * TCL_CUSTOM_TYPE_KEYS:      The keys are arbitrary types which are copied
 *                      into the entry.
 * TCL_CUSTOM_PTR_KEYS:       The keys are pointers to arbitrary types, the
 *                      pointer is stored in the entry.
 * While maintaining binary compatability the above have to be distinct values
 * as they are used to differentiate between old versions of the hash table
 * which don't have a typePtr and new ones which do. Once binary compatability
 * is discarded in favour of making more wide spread changes TCL_STRING_KEYS
 * can be the same as TCL_CUSTOM_TYPE_KEYS, and TCL_ONE_WORD_KEYS can be the
 * same as TCL_CUSTOM_PTR_KEYS because they simply determine how the key is
 * accessed from the entry and not the behaviour.

#define TCL_STRING_KEYS       0
#define TCL_ONE_WORD_KEYS     1
#define TCL_CUSTOM_PTR_KEYS   -1

 * Structure definition for information used to keep track of searches through
 * dictionaries. These fields should not be accessed by code outside
 * tclDictObj.c

typedef struct {
    void *next;               /* Search position for underlying hash
                         * table. */
    int epoch;                /* Epoch marker for dictionary being searched,
                         * or -1 if search has terminated. */
    Tcl_Dict dictionaryPtr;   /* Reference to dictionary being searched. */
} Tcl_DictSearch;

 * Flag values to pass to Tcl_DoOneEvent to disable searches for some kinds of
 * events:

#define TCL_DONT_WAIT         (1<<1)
#define TCL_WINDOW_EVENTS     (1<<2)
#define TCL_FILE_EVENTS       (1<<3)
#define TCL_TIMER_EVENTS      (1<<4)
#define TCL_IDLE_EVENTS       (1<<5)      /* WAS 0x10 ???? */
#define TCL_ALL_EVENTS        (~TCL_DONT_WAIT)

 * The following structure defines a generic event for the Tcl event system.
 * These are the things that are queued in calls to Tcl_QueueEvent and
 * serviced later by Tcl_DoOneEvent. There can be many different kinds of
 * events with different fields, corresponding to window events, timer events,
 * etc. The structure for a particular event consists of a Tcl_Event header
 * followed by additional information specific to that event.

struct Tcl_Event {
    Tcl_EventProc *proc;      /* Function to call to service this event. */
    struct Tcl_Event *nextPtr;      /* Next in list of pending events, or NULL. */

 * Positions to pass to Tcl_QueueEvent:

typedef enum {
} Tcl_QueuePosition;

 * Values to pass to Tcl_SetServiceMode to specify the behavior of notifier
 * event routines.


 * The following structure keeps is used to hold a time value, either as an
 * absolute time (the number of seconds from the epoch) or as an elapsed time.
 * On Unix systems the epoch is Midnight Jan 1, 1970 GMT.

typedef struct Tcl_Time {
    long sec;                 /* Seconds. */
    long usec;                /* Microseconds. */
} Tcl_Time;

typedef void (Tcl_SetTimerProc) _ANSI_ARGS_((Tcl_Time *timePtr));
typedef int (Tcl_WaitForEventProc) _ANSI_ARGS_((Tcl_Time *timePtr));

 * TIP #233 (Virtualized Time)

typedef void (Tcl_GetTimeProc)   _ANSI_ARGS_ ((Tcl_Time* timebuf, ClientData clientData));
typedef void (Tcl_ScaleTimeProc) _ANSI_ARGS_ ((Tcl_Time* timebuf, ClientData clientData));

 * Bits to pass to Tcl_CreateFileHandler and Tcl_CreateChannelHandler to
 * indicate what sorts of events are of interest:

#define TCL_READABLE    (1<<1)
#define TCL_WRITABLE    (1<<2)
#define TCL_EXCEPTION   (1<<3)

 * Flag values to pass to Tcl_OpenCommandChannel to indicate the disposition
 * of the stdio handles. TCL_STDIN, TCL_STDOUT, TCL_STDERR, are also used in
 * Tcl_GetStdChannel.

#define TCL_STDIN       (1<<1)
#define TCL_STDOUT            (1<<2)
#define TCL_STDERR            (1<<3)
#define TCL_ENFORCE_MODE      (1<<4)

 * Bits passed to Tcl_DriverClose2Proc to indicate which side of a channel
 * should be closed.

#define TCL_CLOSE_READ  (1<<1)
#define TCL_CLOSE_WRITE (1<<2)

 * Value to use as the closeProc for a channel that supports the close2Proc
 * interface.

#define TCL_CLOSE2PROC  ((Tcl_DriverCloseProc *)1)

 * Channel version tag. This was introduced in 8.3.2/8.4.

#define TCL_CHANNEL_VERSION_1 ((Tcl_ChannelTypeVersion) 0x1)
#define TCL_CHANNEL_VERSION_2 ((Tcl_ChannelTypeVersion) 0x2)
#define TCL_CHANNEL_VERSION_3 ((Tcl_ChannelTypeVersion) 0x3)
#define TCL_CHANNEL_VERSION_4 ((Tcl_ChannelTypeVersion) 0x4)
#define TCL_CHANNEL_VERSION_5 ((Tcl_ChannelTypeVersion) 0x5)

 * TIP #218: Channel Actions, Ids for Tcl_DriverThreadActionProc


 * Typedefs for the various operations in a channel type:

typedef int (Tcl_DriverBlockModeProc) _ANSI_ARGS_((
                ClientData instanceData, int mode));
typedef int (Tcl_DriverCloseProc) _ANSI_ARGS_((ClientData instanceData,
                Tcl_Interp *interp));
typedef int (Tcl_DriverClose2Proc) _ANSI_ARGS_((ClientData instanceData,
                Tcl_Interp *interp, int flags));
typedef int (Tcl_DriverInputProc) _ANSI_ARGS_((ClientData instanceData,
                char *buf, int toRead, int *errorCodePtr));
typedef int (Tcl_DriverOutputProc) _ANSI_ARGS_((ClientData instanceData,
                CONST84 char *buf, int toWrite, int *errorCodePtr));
typedef int (Tcl_DriverSeekProc) _ANSI_ARGS_((ClientData instanceData,
                long offset, int mode, int *errorCodePtr));
typedef int (Tcl_DriverSetOptionProc) _ANSI_ARGS_((
                ClientData instanceData, Tcl_Interp *interp,
                CONST char *optionName, CONST char *value));
typedef int (Tcl_DriverGetOptionProc) _ANSI_ARGS_((
                ClientData instanceData, Tcl_Interp *interp,
                CONST84 char *optionName, Tcl_DString *dsPtr));
typedef void      (Tcl_DriverWatchProc) _ANSI_ARGS_((
                ClientData instanceData, int mask));
typedef int (Tcl_DriverGetHandleProc) _ANSI_ARGS_((
                ClientData instanceData, int direction,
                ClientData *handlePtr));
typedef int (Tcl_DriverFlushProc) _ANSI_ARGS_((ClientData instanceData));
typedef int (Tcl_DriverHandlerProc) _ANSI_ARGS_((
                ClientData instanceData, int interestMask));
typedef Tcl_WideInt (Tcl_DriverWideSeekProc) _ANSI_ARGS_((
                ClientData instanceData, Tcl_WideInt offset,
                int mode, int *errorCodePtr));
 * TIP #218, Channel Thread Actions
typedef void      (Tcl_DriverThreadActionProc) _ANSI_ARGS_ ((
                ClientData instanceData, int action));
 * TIP #208, File Truncation (etc.)
typedef int (Tcl_DriverTruncateProc) _ANSI_ARGS_((
                ClientData instanceData, Tcl_WideInt length));

 * struct Tcl_ChannelType:
 * One such structure exists for each type (kind) of channel. It collects
 * together in one place all the functions that are part of the specific
 * channel type.
 * It is recommend that the Tcl_Channel* functions are used to access elements
 * of this structure, instead of direct accessing.

typedef struct Tcl_ChannelType {
    char *typeName;           /* The name of the channel type in Tcl
                         * commands. This storage is owned by channel
                         * type. */
    Tcl_ChannelTypeVersion version;
                        /* Version of the channel type. */
    Tcl_DriverCloseProc *closeProc;
                        /* Function to call to close the channel, or
                         * TCL_CLOSE2PROC if the close2Proc should be
                         * used instead. */
    Tcl_DriverInputProc *inputProc;
                        /* Function to call for input on channel. */
    Tcl_DriverOutputProc *outputProc;
                        /* Function to call for output on channel. */
    Tcl_DriverSeekProc *seekProc;
                        /* Function to call to seek on the channel.
                         * May be NULL. */
    Tcl_DriverSetOptionProc *setOptionProc;
                        /* Set an option on a channel. */
    Tcl_DriverGetOptionProc *getOptionProc;
                        /* Get an option from a channel. */
    Tcl_DriverWatchProc *watchProc;
                        /* Set up the notifier to watch for events on
                         * this channel. */
    Tcl_DriverGetHandleProc *getHandleProc;
                        /* Get an OS handle from the channel or NULL
                         * if not supported. */
    Tcl_DriverClose2Proc *close2Proc;
                        /* Function to call to close the channel if
                         * the device supports closing the read &
                         * write sides independently. */
    Tcl_DriverBlockModeProc *blockModeProc;
                        /* Set blocking mode for the raw channel. May
                         * be NULL. */
     * Only valid in TCL_CHANNEL_VERSION_2 channels or later
    Tcl_DriverFlushProc *flushProc;
                        /* Function to call to flush a channel. May be
                         * NULL. */
    Tcl_DriverHandlerProc *handlerProc;
                        /* Function to call to handle a channel event.
                         * This will be passed up the stacked channel
                         * chain. */
     * Only valid in TCL_CHANNEL_VERSION_3 channels or later
    Tcl_DriverWideSeekProc *wideSeekProc;
                        /* Function to call to seek on the channel
                         * which can handle 64-bit offsets. May be
                         * NULL, and must be NULL if seekProc is
                         * NULL. */
     * Only valid in TCL_CHANNEL_VERSION_4 channels or later
     * TIP #218, Channel Thread Actions
    Tcl_DriverThreadActionProc *threadActionProc;
                        /* Function to call to notify the driver of
                         * thread specific activity for a channel. May
                         * be NULL. */

     * Only valid in TCL_CHANNEL_VERSION_5 channels or later
     * TIP #208, File Truncation
    Tcl_DriverTruncateProc *truncateProc;
                        /* Function to call to truncate the underlying
                         * file to a particular length. May be NULL if
                         * the channel does not support truncation. */
} Tcl_ChannelType;

 * The following flags determine whether the blockModeProc above should set
 * the channel into blocking or nonblocking mode. They are passed as arguments
 * to the blockModeProc function in the above structure.

#define TCL_MODE_BLOCKING     0     /* Put channel into blocking mode. */
#define TCL_MODE_NONBLOCKING  1     /* Put channel into nonblocking
                               * mode. */

 * Enum for different types of file paths.

typedef enum Tcl_PathType {
} Tcl_PathType;

 * The following structure is used to pass glob type data amongst the various
 * glob routines and Tcl_FSMatchInDirectory.

typedef struct Tcl_GlobTypeData {
    int type;                 /* Corresponds to bcdpfls as in 'find -t' */
    int perm;                 /* Corresponds to file permissions */
    Tcl_Obj *macType;         /* Acceptable mac type */
    Tcl_Obj *macCreator;      /* Acceptable mac creator */
} Tcl_GlobTypeData;

 * Type and permission definitions for glob command

#define TCL_GLOB_TYPE_BLOCK         (1<<0)
#define TCL_GLOB_TYPE_CHAR          (1<<1)
#define TCL_GLOB_TYPE_DIR           (1<<2)
#define TCL_GLOB_TYPE_PIPE          (1<<3)
#define TCL_GLOB_TYPE_FILE          (1<<4)
#define TCL_GLOB_TYPE_LINK          (1<<5)
#define TCL_GLOB_TYPE_SOCK          (1<<6)
#define TCL_GLOB_TYPE_MOUNT         (1<<7)

#define TCL_GLOB_PERM_RONLY         (1<<0)
#define TCL_GLOB_PERM_HIDDEN        (1<<1)
#define TCL_GLOB_PERM_R             (1<<2)
#define TCL_GLOB_PERM_W             (1<<3)
#define TCL_GLOB_PERM_X             (1<<4)

 * Flags for the unload callback function

#define TCL_UNLOAD_DETACH_FROM_PROCESS          (1<<1)

 * Typedefs for the various filesystem operations:

typedef int (Tcl_FSStatProc) _ANSI_ARGS_((Tcl_Obj *pathPtr, Tcl_StatBuf *buf));
typedef int (Tcl_FSAccessProc) _ANSI_ARGS_((Tcl_Obj *pathPtr, int mode));
typedef Tcl_Channel (Tcl_FSOpenFileChannelProc) _ANSI_ARGS_((
      Tcl_Interp *interp, Tcl_Obj *pathPtr, int mode, int permissions));
typedef int (Tcl_FSMatchInDirectoryProc) _ANSI_ARGS_((Tcl_Interp* interp,
      Tcl_Obj *result, Tcl_Obj *pathPtr, CONST char *pattern,
      Tcl_GlobTypeData * types));
typedef Tcl_Obj* (Tcl_FSGetCwdProc) _ANSI_ARGS_((Tcl_Interp *interp));
typedef int (Tcl_FSChdirProc) _ANSI_ARGS_((Tcl_Obj *pathPtr));
typedef int (Tcl_FSLstatProc) _ANSI_ARGS_((Tcl_Obj *pathPtr,
      Tcl_StatBuf *buf));
typedef int (Tcl_FSCreateDirectoryProc) _ANSI_ARGS_((Tcl_Obj *pathPtr));
typedef int (Tcl_FSDeleteFileProc) _ANSI_ARGS_((Tcl_Obj *pathPtr));
typedef int (Tcl_FSCopyDirectoryProc) _ANSI_ARGS_((Tcl_Obj *srcPathPtr,
      Tcl_Obj *destPathPtr, Tcl_Obj **errorPtr));
typedef int (Tcl_FSCopyFileProc) _ANSI_ARGS_((Tcl_Obj *srcPathPtr,
      Tcl_Obj *destPathPtr));
typedef int (Tcl_FSRemoveDirectoryProc) _ANSI_ARGS_((Tcl_Obj *pathPtr,
      int recursive, Tcl_Obj **errorPtr));
typedef int (Tcl_FSRenameFileProc) _ANSI_ARGS_((Tcl_Obj *srcPathPtr,
      Tcl_Obj *destPathPtr));
typedef void (Tcl_FSUnloadFileProc) _ANSI_ARGS_((Tcl_LoadHandle loadHandle));
typedef Tcl_Obj* (Tcl_FSListVolumesProc) _ANSI_ARGS_((void));
/* We have to declare the utime structure here. */
struct utimbuf;
typedef int (Tcl_FSUtimeProc) _ANSI_ARGS_((Tcl_Obj *pathPtr,
      struct utimbuf *tval));
typedef int (Tcl_FSNormalizePathProc) _ANSI_ARGS_((Tcl_Interp *interp,
      Tcl_Obj *pathPtr, int nextCheckpoint));
typedef int (Tcl_FSFileAttrsGetProc) _ANSI_ARGS_((Tcl_Interp *interp,
      int index, Tcl_Obj *pathPtr, Tcl_Obj **objPtrRef));
typedef CONST char** (Tcl_FSFileAttrStringsProc) _ANSI_ARGS_((
      Tcl_Obj *pathPtr, Tcl_Obj** objPtrRef));
typedef int (Tcl_FSFileAttrsSetProc) _ANSI_ARGS_((Tcl_Interp *interp,
      int index, Tcl_Obj *pathPtr, Tcl_Obj *objPtr));
typedef Tcl_Obj* (Tcl_FSLinkProc) _ANSI_ARGS_((Tcl_Obj *pathPtr,
      Tcl_Obj *toPtr, int linkType));
typedef int (Tcl_FSLoadFileProc) _ANSI_ARGS_((Tcl_Interp * interp,
      Tcl_Obj *pathPtr, Tcl_LoadHandle *handlePtr,
      Tcl_FSUnloadFileProc **unloadProcPtr));
typedef int (Tcl_FSPathInFilesystemProc) _ANSI_ARGS_((Tcl_Obj *pathPtr,
      ClientData *clientDataPtr));
typedef Tcl_Obj* (Tcl_FSFilesystemPathTypeProc) _ANSI_ARGS_((
      Tcl_Obj *pathPtr));
typedef Tcl_Obj* (Tcl_FSFilesystemSeparatorProc) _ANSI_ARGS_((
      Tcl_Obj *pathPtr));
typedef void (Tcl_FSFreeInternalRepProc) _ANSI_ARGS_((ClientData clientData));
typedef ClientData (Tcl_FSDupInternalRepProc) _ANSI_ARGS_((
      ClientData clientData));
typedef Tcl_Obj* (Tcl_FSInternalToNormalizedProc) _ANSI_ARGS_((
      ClientData clientData));
typedef ClientData (Tcl_FSCreateInternalRepProc) _ANSI_ARGS_((
      Tcl_Obj *pathPtr));

typedef struct Tcl_FSVersion_ *Tcl_FSVersion;

 * Data structures related to hooking into the filesystem

 * Filesystem version tag.  This was introduced in 8.4.
#define TCL_FILESYSTEM_VERSION_1    ((Tcl_FSVersion) 0x1)

 * struct Tcl_Filesystem:
 * One such structure exists for each type (kind) of filesystem. It collects
 * together in one place all the functions that are part of the specific
 * filesystem. Tcl always accesses the filesystem through one of these
 * structures.
 * Not all entries need be non-NULL; any which are NULL are simply ignored.
 * However, a complete filesystem should provide all of these functions. The
 * explanations in the structure show the importance of each function.

typedef struct Tcl_Filesystem {
    CONST char *typeName;     /* The name of the filesystem. */
    int structureLength;      /* Length of this structure, so future binary
                         * compatibility can be assured. */
    Tcl_FSVersion version;    /* Version of the filesystem type. */
    Tcl_FSPathInFilesystemProc *pathInFilesystemProc;
                        /* Function to check whether a path is in this
                         * filesystem. This is the most important
                         * filesystem function. */
    Tcl_FSDupInternalRepProc *dupInternalRepProc;
                        /* Function to duplicate internal fs rep. May
                         * be NULL (but then fs is less efficient). */
    Tcl_FSFreeInternalRepProc *freeInternalRepProc;
                        /* Function to free internal fs rep. Must be
                         * implemented if internal representations
                         * need freeing, otherwise it can be NULL. */
    Tcl_FSInternalToNormalizedProc *internalToNormalizedProc;
                        /* Function to convert internal representation
                         * to a normalized path. Only required if the
                         * fs creates pure path objects with no
                         * string/path representation. */
    Tcl_FSCreateInternalRepProc *createInternalRepProc;
                        /* Function to create a filesystem-specific
                         * internal representation. May be NULL if
                         * paths have no internal representation, or
                         * if the Tcl_FSPathInFilesystemProc for this
                         * filesystem always immediately creates an
                         * internal representation for paths it
                         * accepts. */
    Tcl_FSNormalizePathProc *normalizePathProc;
                        /* Function to normalize a path.  Should be
                         * implemented for all filesystems which can
                         * have multiple string representations for
                         * the same path object. */
    Tcl_FSFilesystemPathTypeProc *filesystemPathTypeProc;
                        /* Function to determine the type of a path in
                         * this filesystem. May be NULL. */
    Tcl_FSFilesystemSeparatorProc *filesystemSeparatorProc;
                        /* Function to return the separator
                         * character(s) for this filesystem. Must be
                         * implemented. */
    Tcl_FSStatProc *statProc; /* Function to process a 'Tcl_FSStat()' call.
                         * Must be implemented for any reasonable
                         * filesystem. */
    Tcl_FSAccessProc *accessProc;
                        /* Function to process a 'Tcl_FSAccess()'
                         * call. Must be implemented for any
                         * reasonable filesystem. */
    Tcl_FSOpenFileChannelProc *openFileChannelProc;
                        /* Function to process a
                         * 'Tcl_FSOpenFileChannel()' call. Must be
                         * implemented for any reasonable
                         * filesystem. */
    Tcl_FSMatchInDirectoryProc *matchInDirectoryProc;
                        /* Function to process a
                         * 'Tcl_FSMatchInDirectory()'.  If not
                         * implemented, then glob and recursive copy
                         * functionality will be lacking in the
                         * filesystem. */
    Tcl_FSUtimeProc *utimeProc;     /* Function to process a 'Tcl_FSUtime()' call.
                         * Required to allow setting (not reading) of
                         * times with 'file mtime', 'file atime' and
                         * the open-r/open-w/fcopy implementation of
                         * 'file copy'. */
    Tcl_FSLinkProc *linkProc; /* Function to process a 'Tcl_FSLink()' call.
                         * Should be implemented only if the
                         * filesystem supports links (reading or
                         * creating). */
    Tcl_FSListVolumesProc *listVolumesProc;
                        /* Function to list any filesystem volumes
                         * added by this filesystem. Should be
                         * implemented only if the filesystem adds
                         * volumes at the head of the filesystem. */
    Tcl_FSFileAttrStringsProc *fileAttrStringsProc;
                        /* Function to list all attributes strings
                         * which are valid for this filesystem. If not
                         * implemented the filesystem will not support
                         * the 'file attributes' command. This allows
                         * arbitrary additional information to be
                         * attached to files in the filesystem. */
    Tcl_FSFileAttrsGetProc *fileAttrsGetProc;
                        /* Function to process a
                         * 'Tcl_FSFileAttrsGet()' call, used by 'file
                         * attributes'. */
    Tcl_FSFileAttrsSetProc *fileAttrsSetProc;
                        /* Function to process a
                         * 'Tcl_FSFileAttrsSet()' call, used by 'file
                         * attributes'.  */
    Tcl_FSCreateDirectoryProc *createDirectoryProc;
                        /* Function to process a
                         * 'Tcl_FSCreateDirectory()' call. Should be
                         * implemented unless the FS is read-only. */
    Tcl_FSRemoveDirectoryProc *removeDirectoryProc;
                        /* Function to process a
                         * 'Tcl_FSRemoveDirectory()' call. Should be
                         * implemented unless the FS is read-only. */
    Tcl_FSDeleteFileProc *deleteFileProc;
                        /* Function to process a 'Tcl_FSDeleteFile()'
                         * call. Should be implemented unless the FS
                         * is read-only. */
    Tcl_FSCopyFileProc *copyFileProc;
                        /* Function to process a 'Tcl_FSCopyFile()'
                         * call. If not implemented Tcl will fall back
                         * on open-r, open-w and fcopy as a copying
                         * mechanism, for copying actions initiated in
                         * Tcl (not C). */
    Tcl_FSRenameFileProc *renameFileProc;
                        /* Function to process a 'Tcl_FSRenameFile()'
                         * call. If not implemented, Tcl will fall
                         * back on a copy and delete mechanism, for
                         * rename actions initiated in Tcl (not C). */
    Tcl_FSCopyDirectoryProc *copyDirectoryProc;
                        /* Function to process a
                         * 'Tcl_FSCopyDirectory()' call. If not
                         * implemented, Tcl will fall back on a
                         * recursive create-dir, file copy mechanism,
                         * for copying actions initiated in Tcl (not
                         * C). */
    Tcl_FSLstatProc *lstatProc;     /* Function to process a 'Tcl_FSLstat()' call.
                         * If not implemented, Tcl will attempt to use
                         * the 'statProc' defined above instead. */
    Tcl_FSLoadFileProc *loadFileProc;
                        /* Function to process a 'Tcl_FSLoadFile()'
                         * call. If not implemented, Tcl will fall
                         * back on a copy to native-temp followed by a
                         * Tcl_FSLoadFile on that temporary copy. */
    Tcl_FSGetCwdProc *getCwdProc;
                        /* Function to process a 'Tcl_FSGetCwd()'
                         * call. Most filesystems need not implement
                         * this. It will usually only be called once,
                         * if 'getcwd' is called before 'chdir'. May
                         * be NULL. */
    Tcl_FSChdirProc *chdirProc;     /* Function to process a 'Tcl_FSChdir()' call.
                         * If filesystems do not implement this, it
                         * will be emulated by a series of directory
                         * access checks. Otherwise, virtual
                         * filesystems which do implement it need only
                         * respond with a positive return result if
                         * the dirName is a valid directory in their
                         * filesystem. They need not remember the
                         * result, since that will be automatically
                         * remembered for use by GetCwd. Real
                         * filesystems should carry out the correct
                         * action (i.e. call the correct system
                         * 'chdir' api). If not implemented, then 'cd'
                         * and 'pwd' will fail inside the
                         * filesystem. */
} Tcl_Filesystem;

 * The following definitions are used as values for the 'linkAction' flag to
 * Tcl_FSLink, or the linkProc of any filesystem. Any combination of flags can
 * be given. For link creation, the linkProc should create a link which
 * matches any of the types given.
 * TCL_CREATE_SYMBOLIC_LINK - Create a symbolic or soft link.
 * TCL_CREATE_HARD_LINK -     Create a hard link.

#define TCL_CREATE_HARD_LINK        0x02

 * The following structure represents the Notifier functions that you can
 * override with the Tcl_SetNotifier call.

typedef struct Tcl_NotifierProcs {
    Tcl_SetTimerProc *setTimerProc;
    Tcl_WaitForEventProc *waitForEventProc;
    Tcl_CreateFileHandlerProc *createFileHandlerProc;
    Tcl_DeleteFileHandlerProc *deleteFileHandlerProc;
    Tcl_InitNotifierProc *initNotifierProc;
    Tcl_FinalizeNotifierProc *finalizeNotifierProc;
    Tcl_AlertNotifierProc *alertNotifierProc;
    Tcl_ServiceModeHookProc *serviceModeHookProc;
} Tcl_NotifierProcs;

 * The following structure represents a user-defined encoding. It collects
 * together all the functions that are used by the specific encoding.

typedef struct Tcl_EncodingType {
    CONST char *encodingName; /* The name of the encoding, e.g. "euc-jp".
                         * This name is the unique key for this
                         * encoding type. */
    Tcl_EncodingConvertProc *toUtfProc;
                        /* Function to convert from external encoding
                         * into UTF-8. */
    Tcl_EncodingConvertProc *fromUtfProc;
                        /* Function to convert from UTF-8 into
                         * external encoding. */
    Tcl_EncodingFreeProc *freeProc;
                        /* If non-NULL, function to call when this
                         * encoding is deleted. */
    ClientData clientData;    /* Arbitrary value associated with encoding
                         * type. Passed to conversion functions. */
    int nullSize;       /* Number of zero bytes that signify
                         * end-of-string in this encoding. This number
                         * is used to determine the source string
                         * length when the srcLen argument is
                         * negative. Must be 1 or 2. */
} Tcl_EncodingType;

 * The following definitions are used as values for the conversion control
 * flags argument when converting text from one character set to another:
 * TCL_ENCODING_START -       Signifies that the source buffer is the first
 *                      block in a (potentially multi-block) input
 *                      stream. Tells the conversion function to reset
 *                      to an initial state and perform any
 *                      initialization that needs to occur before the
 *                      first byte is converted. If the source buffer
 *                      contains the entire input stream to be
 *                      converted, this flag should be set.
 * TCL_ENCODING_END -         Signifies that the source buffer is the last
 *                      block in a (potentially multi-block) input
 *                      stream. Tells the conversion routine to
 *                      perform any finalization that needs to occur
 *                      after the last byte is converted and then to
 *                      reset to an initial state. If the source
 *                      buffer contains the entire input stream to be
 *                      converted, this flag should be set.
 * TCL_ENCODING_STOPONERROR - If set, then the converter will return
 *                      immediately upon encountering an invalid byte
 *                      sequence or a source character that has no
 *                      mapping in the target encoding. If clear, then
 *                      the converter will skip the problem,
 *                      substituting one or more "close" characters in
 *                      the destination buffer and then continue to
 *                      convert the source.

#define TCL_ENCODING_START          0x01
#define TCL_ENCODING_END            0x02

 * The following data structures and declarations are for the new Tcl parser.

 * For each word of a command, and for each piece of a word such as a variable
 * reference, one of the following structures is created to describe the
 * token.

typedef struct Tcl_Token {
    int type;                 /* Type of token, such as TCL_TOKEN_WORD; see
                         * below for valid types. */
    CONST char *start;        /* First character in token. */
    int size;                 /* Number of bytes in token. */
    int numComponents;        /* If this token is composed of other tokens,
                         * this field tells how many of them there are
                         * (including components of components, etc.).
                         * The component tokens immediately follow
                         * this one. */
} Tcl_Token;

 * Type values defined for Tcl_Token structures. These values are defined as
 * mask bits so that it's easy to check for collections of types.
 * TCL_TOKEN_WORD -           The token describes one word of a command,
 *                      from the first non-blank character of the word
 *                      (which may be " or {) up to but not including
 *                      the space, semicolon, or bracket that
 *                      terminates the word. NumComponents counts the
 *                      total number of sub-tokens that make up the
 *                      word. This includes, for example, sub-tokens
 *                      of TCL_TOKEN_VARIABLE tokens.
 * TCL_TOKEN_SIMPLE_WORD -    This token is just like TCL_TOKEN_WORD except
 *                      that the word is guaranteed to consist of a
 *                      single TCL_TOKEN_TEXT sub-token.
 * TCL_TOKEN_TEXT -           The token describes a range of literal text
 *                      that is part of a word. NumComponents is
 *                      always 0.
 * TCL_TOKEN_BS -       The token describes a backslash sequence that
 *                      must be collapsed. NumComponents is always 0.
 * TCL_TOKEN_COMMAND -        The token describes a command whose result
 *                      must be substituted into the word. The token
 *                      includes the enclosing brackets. NumComponents
 *                      is always 0.
 * TCL_TOKEN_VARIABLE -       The token describes a variable substitution,
 *                      including the dollar sign, variable name, and
 *                      array index (if there is one) up through the
 *                      right parentheses. NumComponents tells how
 *                      many additional tokens follow to represent the
 *                      variable name. The first token will be a
 *                      TCL_TOKEN_TEXT token that describes the
 *                      variable name. If the variable is an array
 *                      reference then there will be one or more
 *                      additional tokens, of type TCL_TOKEN_TEXT,
 *                      TCL_TOKEN_BS, TCL_TOKEN_COMMAND, and
 *                      TCL_TOKEN_VARIABLE, that describe the array
 *                      index; numComponents counts the total number
 *                      of nested tokens that make up the variable
 *                      reference, including sub-tokens of
 *                      TCL_TOKEN_VARIABLE tokens.
 * TCL_TOKEN_SUB_EXPR -       The token describes one subexpression of an
 *                      expression, from the first non-blank character
 *                      of the subexpression up to but not including
 *                      the space, brace, or bracket that terminates
 *                      the subexpression. NumComponents counts the
 *                      total number of following subtokens that make
 *                      up the subexpression; this includes all
 *                      subtokens for any nested TCL_TOKEN_SUB_EXPR
 *                      tokens. For example, a numeric value used as a
 *                      primitive operand is described by a
 *                      TCL_TOKEN_SUB_EXPR token followed by a
 *                      TCL_TOKEN_TEXT token. A binary subexpression
 *                      is described by a TCL_TOKEN_SUB_EXPR token
 *                      followed by the TCL_TOKEN_OPERATOR token for
 *                      the operator, then TCL_TOKEN_SUB_EXPR tokens
 *                      for the left then the right operands.
 * TCL_TOKEN_OPERATOR -       The token describes one expression operator.
 *                      An operator might be the name of a math
 *                      function such as "abs". A TCL_TOKEN_OPERATOR
 *                      token is always preceeded by one
 *                      TCL_TOKEN_SUB_EXPR token for the operator's
 *                      subexpression, and is followed by zero or more
 *                      TCL_TOKEN_SUB_EXPR tokens for the operator's
 *                      operands. NumComponents is always 0.
 * TCL_TOKEN_EXPAND_WORD -    This token is just like TCL_TOKEN_WORD except
 *                      that it marks a word that began with the
 *                      literal character prefix "{*}". This word is
 *                      marked to be expanded - that is, broken into
 *                      words after substitution is complete.

#define TCL_TOKEN_WORD        1
#define TCL_TOKEN_TEXT        4
#define TCL_TOKEN_BS          8
#define TCL_TOKEN_COMMAND     16
#define TCL_TOKEN_VARIABLE    32
#define TCL_TOKEN_SUB_EXPR    64
#define TCL_TOKEN_OPERATOR    128

 * Parsing error types. On any parsing error, one of these values will be
 * stored in the error field of the Tcl_Parse structure defined below.

#define TCL_PARSE_SUCCESS           0
#define TCL_PARSE_QUOTE_EXTRA       1
#define TCL_PARSE_BRACE_EXTRA       2
#define TCL_PARSE_MISSING_BRACE           3
#define TCL_PARSE_MISSING_PAREN           5
#define TCL_PARSE_MISSING_QUOTE           6
#define TCL_PARSE_SYNTAX            8
#define TCL_PARSE_BAD_NUMBER        9

 * A structure of the following type is filled in by Tcl_ParseCommand. It
 * describes a single command parsed from an input string.


typedef struct Tcl_Parse {
    CONST char *commentStart; /* Pointer to # that begins the first of one
                         * or more comments preceding the command. */
    int commentSize;          /* Number of bytes in comments (up through
                         * newline character that terminates the last
                         * comment). If there were no comments, this
                         * field is 0. */
    CONST char *commandStart; /* First character in first word of
                         * command. */
    int commandSize;          /* Number of bytes in command, including first
                         * character of first word, up through the
                         * terminating newline, close bracket, or
                         * semicolon. */
    int numWords;       /* Total number of words in command. May be
                         * 0. */
    Tcl_Token *tokenPtr;      /* Pointer to first token representing the
                         * words of the command. Initially points to
                         * staticTokens, but may change to point to
                         * malloc-ed space if command exceeds space in
                         * staticTokens. */
    int numTokens;            /* Total number of tokens in command. */
    int tokensAvailable;      /* Total number of tokens available at
                         * *tokenPtr. */
    int errorType;            /* One of the parsing error types defined
                         * above. */

     * The fields below are intended only for the private use of the parser.
     * They should not be used by functions that invoke Tcl_ParseCommand.

    CONST char *string;       /* The original command string passed to
                         * Tcl_ParseCommand. */
    CONST char *end;          /* Points to the character just after the last
                         * one in the command string. */
    Tcl_Interp *interp;       /* Interpreter to use for error reporting, or
                         * NULL. */
    CONST char *term;         /* Points to character in string that
                         * terminated most recent token. Filled in by
                         * ParseTokens. If an error occurs, points to
                         * beginning of region where the error
                         * occurred (e.g. the open brace if the close
                         * brace is missing). */
    int incomplete;           /* This field is set to 1 by Tcl_ParseCommand
                         * if the command appears to be incomplete.
                         * This information is used by
                         * Tcl_CommandComplete. */
    Tcl_Token staticTokens[NUM_STATIC_TOKENS];
                        /* Initial space for tokens for command. This
                         * space should be large enough to accommodate
                         * most commands; dynamic space is allocated
                         * for very large commands that don't fit
                         * here. */
} Tcl_Parse;

 * The following definitions are the error codes returned by the conversion
 * routines:
 * TCL_OK -             All characters were converted.
 * TCL_CONVERT_NOSPACE -      The output buffer would not have been large
 *                      enough for all of the converted data; as many
 *                      characters as could fit were converted though.
 * TCL_CONVERT_MULTIBYTE -    The last few bytes in the source string were
 *                      the beginning of a multibyte sequence, but
 *                      more bytes were needed to complete this
 *                      sequence. A subsequent call to the conversion
 *                      routine should pass the beginning of this
 *                      unconverted sequence plus additional bytes
 *                      from the source stream to properly convert the
 *                      formerly split-up multibyte sequence.
 * TCL_CONVERT_SYNTAX -       The source stream contained an invalid
 *                      character sequence. This may occur if the
 *                      input stream has been damaged or if the input
 *                      encoding method was misidentified. This error
 *                      is reported only if TCL_ENCODING_STOPONERROR
 *                      was specified.
 * TCL_CONVERT_UNKNOWN -      The source string contained a character that
 *                      could not be represented in the target
 *                      encoding. This error is reported only if
 *                      TCL_ENCODING_STOPONERROR was specified.

#define TCL_CONVERT_SYNTAX    -2

 * The maximum number of bytes that are necessary to represent a single
 * Unicode character in UTF-8. The valid values should be 3 or 6 (or perhaps 1
 * if we want to support a non-unicode enabled core). If 3, then Tcl_UniChar
 * must be 2-bytes in size (UCS-2) (the default). If 6, then Tcl_UniChar must
 * be 4-bytes in size (UCS-4). At this time UCS-2 mode is the default and
 * recommended mode. UCS-4 is experimental and not recommended. It works for
 * the core, but most extensions expect UCS-2.

#ifndef TCL_UTF_MAX
#define TCL_UTF_MAX           3

 * This represents a Unicode character. Any changes to this should also be
 * reflected in regcustom.h.

#if TCL_UTF_MAX > 3
     * unsigned int isn't 100% accurate as it should be a strict 4-byte value
     * (perhaps wchar_t). 64-bit systems may have troubles. The size of this
     * value must be reflected correctly in regcustom.h and
     * in tclEncoding.c.
     * XXX: Tcl is currently UCS-2 and planning UTF-16 for the Unicode
     * XXX: string rep that Tcl_UniChar represents.  Changing the size
     * XXX: of Tcl_UniChar is /not/ supported.
typedef unsigned int Tcl_UniChar;
typedef unsigned short Tcl_UniChar;

 * TIP #59: The following structure is used in calls 'Tcl_RegisterConfig' to
 * provide the system with the embedded configuration data.

typedef struct Tcl_Config {
    CONST char *key;          /* Configuration key to register. ASCII
                         * encoded, thus UTF-8 */
    CONST char *value;        /* The value associated with the key. System
                         * encoding */
} Tcl_Config;

 * Flags for TIP#143 limits, detailing which limits are active in an
 * interpreter. Used for Tcl_{Add,Remove}LimitHandler type argument.

#define TCL_LIMIT_COMMANDS    0x01
#define TCL_LIMIT_TIME        0x02

 * Structure containing information about a limit handler to be called when a
 * command- or time-limit is exceeded by an interpreter.

typedef void (Tcl_LimitHandlerProc) _ANSI_ARGS_((ClientData clientData,
      Tcl_Interp *interp));
typedef void (Tcl_LimitHandlerDeleteProc) _ANSI_ARGS_((ClientData clientData));

typedef struct mp_int mp_int;
typedef unsigned long mp_digit;

 * The following constant is used to test for older versions of Tcl in the
 * stubs tables.
 * Jan Nijtman's plus patch uses 0xFCA1BACF, so we need to pick a different
 * value since the stubs tables don't match.

#define TCL_STUB_MAGIC ((int)0xFCA3BACF)

 * The following function is required to be defined in all stubs aware
 * extensions. The function is actually implemented in the stub library, not
 * the main Tcl library, although there is a trivial implementation in the
 * main library in case an extension is statically linked into an application.

EXTERN CONST char *     Tcl_InitStubs _ANSI_ARGS_((Tcl_Interp *interp,
                      CONST char *version, int exact));
EXTERN CONST char*      TclTomMathInitializeStubs(Tcl_Interp* interp,
                        CONST char* version, int epoch, int revision);


 * When not using stubs, make it a macro.

#define Tcl_InitStubs(interp, version, exact) \
    Tcl_PkgInitStubsCheck(interp, version, exact)


     * TODO - tommath stubs export goes here!

 * Public functions that are not accessible via the stubs table.

EXTERN void Tcl_Main _ANSI_ARGS_((int argc, char **argv,
      Tcl_AppInitProc *appInitProc));

EXTERN CONST char *Tcl_PkgInitStubsCheck _ANSI_ARGS_((Tcl_Interp *interp,
                      CONST char *version, int exact));

 * Include the public function declarations that are accessible via the stubs
 * table.

#include "tclDecls.h"

 * Include platform specific public function declarations that are accessible
 * via the stubs table.

#include "tclPlatDecls.h"

 * The following declarations either map ckalloc and ckfree to malloc and
 * free, or they map them to functions with all sorts of debugging hooks
 * defined in tclCkalloc.c.


#   define ckalloc(x) Tcl_DbCkalloc(x, __FILE__, __LINE__)
#   define ckfree(x)  Tcl_DbCkfree(x, __FILE__, __LINE__)
#   define ckrealloc(x,y) Tcl_DbCkrealloc((x), (y),__FILE__, __LINE__)
#   define attemptckalloc(x) Tcl_AttemptDbCkalloc(x, __FILE__, __LINE__)
#   define attemptckrealloc(x,y) Tcl_AttemptDbCkrealloc((x), (y), __FILE__, __LINE__)

#else /* !TCL_MEM_DEBUG */

 * If we are not using the debugging allocator, we should call the Tcl_Alloc,
 * et al. routines in order to guarantee that every module is using the same
 * memory allocator both inside and outside of the Tcl library.

#   define ckalloc(x) Tcl_Alloc(x)
#   define ckfree(x) Tcl_Free(x)
#   define ckrealloc(x,y) Tcl_Realloc(x,y)
#   define attemptckalloc(x) Tcl_AttemptAlloc(x)
#   define attemptckrealloc(x,y) Tcl_AttemptRealloc(x,y)
#   undef  Tcl_InitMemory
#   define Tcl_InitMemory(x)
#   undef  Tcl_DumpActiveMemory
#   define Tcl_DumpActiveMemory(x)
#   undef  Tcl_ValidateAllMemory
#   define Tcl_ValidateAllMemory(x,y)

#endif /* !TCL_MEM_DEBUG */

#   define Tcl_IncrRefCount(objPtr) \
      Tcl_DbIncrRefCount(objPtr, __FILE__, __LINE__)
#   define Tcl_DecrRefCount(objPtr) \
      Tcl_DbDecrRefCount(objPtr, __FILE__, __LINE__)
#   define Tcl_IsShared(objPtr) \
      Tcl_DbIsShared(objPtr, __FILE__, __LINE__)
#   define Tcl_IncrRefCount(objPtr) \
     * Use do/while0 idiom for optimum correctness without compiler warnings
     * http://c2.com/cgi/wiki?TrivialDoWhileLoop
#   define Tcl_DecrRefCount(objPtr) \
      do { if (--(objPtr)->refCount <= 0) TclFreeObj(objPtr); } while(0)
#   define Tcl_IsShared(objPtr) \
      ((objPtr)->refCount > 1)

 * Macros and definitions that help to debug the use of Tcl objects. When
 * TCL_MEM_DEBUG is defined, the Tcl_New declarations are overridden to call
 * debugging versions of the object creation functions.

#  undef  Tcl_NewBignumObj
#  define Tcl_NewBignumObj(val) \
     Tcl_DbNewBignumObj(val, __FILE__, __LINE__)
#  undef  Tcl_NewBooleanObj
#  define Tcl_NewBooleanObj(val) \
     Tcl_DbNewBooleanObj(val, __FILE__, __LINE__)
#  undef  Tcl_NewByteArrayObj
#  define Tcl_NewByteArrayObj(bytes, len) \
     Tcl_DbNewByteArrayObj(bytes, len, __FILE__, __LINE__)
#  undef  Tcl_NewDoubleObj
#  define Tcl_NewDoubleObj(val) \
     Tcl_DbNewDoubleObj(val, __FILE__, __LINE__)
#  undef  Tcl_NewIntObj
#  define Tcl_NewIntObj(val) \
     Tcl_DbNewLongObj(val, __FILE__, __LINE__)
#  undef  Tcl_NewListObj
#  define Tcl_NewListObj(objc, objv) \
     Tcl_DbNewListObj(objc, objv, __FILE__, __LINE__)
#  undef  Tcl_NewLongObj
#  define Tcl_NewLongObj(val) \
     Tcl_DbNewLongObj(val, __FILE__, __LINE__)
#  undef  Tcl_NewObj
#  define Tcl_NewObj() \
     Tcl_DbNewObj(__FILE__, __LINE__)
#  undef  Tcl_NewStringObj
#  define Tcl_NewStringObj(bytes, len) \
     Tcl_DbNewStringObj(bytes, len, __FILE__, __LINE__)
#  undef  Tcl_NewWideIntObj
#  define Tcl_NewWideIntObj(val) \
     Tcl_DbNewWideIntObj(val, __FILE__, __LINE__)
#endif /* TCL_MEM_DEBUG */

 * Macros for clients to use to access fields of hash entries:

#define Tcl_GetHashValue(h) ((h)->clientData)
#define Tcl_SetHashValue(h, value) ((h)->clientData = (ClientData) (value))
#define Tcl_GetHashKey(tablePtr, h) \
      ((char *) (((tablePtr)->keyType == TCL_ONE_WORD_KEYS || \
                (tablePtr)->keyType == TCL_CUSTOM_PTR_KEYS) \
               ? (h)->key.oneWordValue \
               : (h)->key.string))

 * Macros to use for clients to use to invoke find and create functions for
 * hash tables:

#undef  Tcl_FindHashEntry
#define Tcl_FindHashEntry(tablePtr, key) \
      (*((tablePtr)->findProc))(tablePtr, key)
#undef  Tcl_CreateHashEntry
#define Tcl_CreateHashEntry(tablePtr, key, newPtr) \
      (*((tablePtr)->createProc))(tablePtr, key, newPtr)

 * Macros that eliminate the overhead of the thread synchronization functions
 * when compiling without thread support.

#undef  Tcl_MutexLock
#define Tcl_MutexLock(mutexPtr)
#undef  Tcl_MutexUnlock
#define Tcl_MutexUnlock(mutexPtr)
#undef  Tcl_MutexFinalize
#define Tcl_MutexFinalize(mutexPtr)
#undef  Tcl_ConditionNotify
#define Tcl_ConditionNotify(condPtr)
#undef  Tcl_ConditionWait
#define Tcl_ConditionWait(condPtr, mutexPtr, timePtr)
#undef  Tcl_ConditionFinalize
#define Tcl_ConditionFinalize(condPtr)
#endif /* TCL_THREADS */

     * Deprecated Tcl functions:

#   undef  Tcl_EvalObj
#   define Tcl_EvalObj(interp,objPtr) \
#   undef  Tcl_GlobalEvalObj
#   define Tcl_GlobalEvalObj(interp,objPtr) \

     * These function have been renamed. The old names are deprecated, but we
     * define these macros for backwards compatibilty.

#   define Tcl_Ckalloc        Tcl_Alloc
#   define Tcl_Ckfree         Tcl_Free
#   define Tcl_Ckrealloc      Tcl_Realloc
#   define Tcl_Return         Tcl_SetResult
#   define Tcl_TildeSubst     Tcl_TranslateFileName
#   define panic        Tcl_Panic
#   define panicVA            Tcl_PanicVA

 * Convenience declaration of Tcl_AppInit for backwards compatibility. This
 * function is not *implemented* by the tcl library, so the storage class is


EXTERN int        Tcl_AppInit _ANSI_ARGS_((Tcl_Interp *interp));


#endif /* RC_INVOKED */

 * end block for C++

#ifdef __cplusplus

#endif /* _TCL */
 * Local Variables:
 * mode: c
 * c-basic-offset: 4
 * fill-column: 78
 * End:

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