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dashley |
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/* $Header$ */
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dashley |
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/*
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* tclBinary.c --
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*
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* This file contains the implementation of the "binary" Tcl built-in
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* command and the Tcl binary data object.
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*
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* Copyright (c) 1997 by Sun Microsystems, Inc.
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* Copyright (c) 1998-1999 by Scriptics Corporation.
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*
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* See the file "license.terms" for information on usage and redistribution
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* of this file, and for a DISCLAIMER OF ALL WARRANTIES.
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*
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* RCS: @(#) $Id: tclbinary.c,v 1.1.1.1 2001/06/13 04:33:55 dtashley Exp $
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*/
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#include <math.h>
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#include "tclInt.h"
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#include "tclPort.h"
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/*
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* The following constants are used by GetFormatSpec to indicate various
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* special conditions in the parsing of a format specifier.
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*/
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#define BINARY_ALL -1 /* Use all elements in the argument. */
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#define BINARY_NOCOUNT -2 /* No count was specified in format. */
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/*
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* Prototypes for local procedures defined in this file:
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*/
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static void DupByteArrayInternalRep _ANSI_ARGS_((Tcl_Obj *srcPtr,
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Tcl_Obj *copyPtr));
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static int FormatNumber _ANSI_ARGS_((Tcl_Interp *interp, int type,
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36 |
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Tcl_Obj *src, unsigned char **cursorPtr));
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static void FreeByteArrayInternalRep _ANSI_ARGS_((Tcl_Obj *objPtr));
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static int GetFormatSpec _ANSI_ARGS_((char **formatPtr,
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char *cmdPtr, int *countPtr));
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static Tcl_Obj * ScanNumber _ANSI_ARGS_((unsigned char *buffer, int type));
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static int SetByteArrayFromAny _ANSI_ARGS_((Tcl_Interp *interp,
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Tcl_Obj *objPtr));
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static void UpdateStringOfByteArray _ANSI_ARGS_((Tcl_Obj *listPtr));
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/*
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* The following object type represents an array of bytes. An array of
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* bytes is not equivalent to an internationalized string. Conceptually, a
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* string is an array of 16-bit quantities organized as a sequence of properly
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* formed UTF-8 characters, while a ByteArray is an array of 8-bit quantities.
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* Accessor functions are provided to convert a ByteArray to a String or a
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* String to a ByteArray. Two or more consecutive bytes in an array of bytes
|
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* may look like a single UTF-8 character if the array is casually treated as
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* a string. But obtaining the String from a ByteArray is guaranteed to
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* produced properly formed UTF-8 sequences so that there is a one-to-one
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* map between bytes and characters.
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*
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* Converting a ByteArray to a String proceeds by casting each byte in the
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* array to a 16-bit quantity, treating that number as a Unicode character,
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* and storing the UTF-8 version of that Unicode character in the String.
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* For ByteArrays consisting entirely of values 1..127, the corresponding
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* String representation is the same as the ByteArray representation.
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*
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* Converting a String to a ByteArray proceeds by getting the Unicode
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* representation of each character in the String, casting it to a
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* byte by truncating the upper 8 bits, and then storing the byte in the
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* ByteArray. Converting from ByteArray to String and back to ByteArray
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* is not lossy, but converting an arbitrary String to a ByteArray may be.
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*/
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Tcl_ObjType tclByteArrayType = {
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"bytearray",
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FreeByteArrayInternalRep,
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DupByteArrayInternalRep,
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UpdateStringOfByteArray,
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SetByteArrayFromAny
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};
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/*
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* The following structure is the internal rep for a ByteArray object.
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* Keeps track of how much memory has been used and how much has been
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* allocated for the byte array to enable growing and shrinking of the
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* ByteArray object with fewer mallocs.
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*/
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typedef struct ByteArray {
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int used; /* The number of bytes used in the byte
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* array. */
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int allocated; /* The amount of space actually allocated
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* minus 1 byte. */
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unsigned char bytes[4]; /* The array of bytes. The actual size of
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* this field depends on the 'allocated' field
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* above. */
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} ByteArray;
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#define BYTEARRAY_SIZE(len) \
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((unsigned) (sizeof(ByteArray) - 4 + (len)))
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#define GET_BYTEARRAY(objPtr) \
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((ByteArray *) (objPtr)->internalRep.otherValuePtr)
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#define SET_BYTEARRAY(objPtr, baPtr) \
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(objPtr)->internalRep.otherValuePtr = (VOID *) (baPtr)
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/*
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*---------------------------------------------------------------------------
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*
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* Tcl_NewByteArrayObj --
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*
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* This procedure is creates a new ByteArray object and initializes
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* it from the given array of bytes.
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*
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* Results:
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* The newly create object is returned. This object will have no
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* initial string representation. The returned object has a ref count
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* of 0.
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*
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* Side effects:
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* Memory allocated for new object and copy of byte array argument.
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*
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*---------------------------------------------------------------------------
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*/
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#ifdef TCL_MEM_DEBUG
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#undef Tcl_NewByteArrayObj
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Tcl_Obj *
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Tcl_NewByteArrayObj(bytes, length)
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unsigned char *bytes; /* The array of bytes used to initialize
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* the new object. */
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131 |
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int length; /* Length of the array of bytes, which must
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* be >= 0. */
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{
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return Tcl_DbNewByteArrayObj(bytes, length, "unknown", 0);
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}
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#else /* if not TCL_MEM_DEBUG */
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Tcl_Obj *
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Tcl_NewByteArrayObj(bytes, length)
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unsigned char *bytes; /* The array of bytes used to initialize
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* the new object. */
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int length; /* Length of the array of bytes, which must
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* be >= 0. */
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{
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Tcl_Obj *objPtr;
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TclNewObj(objPtr);
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Tcl_SetByteArrayObj(objPtr, bytes, length);
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return objPtr;
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}
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#endif /* TCL_MEM_DEBUG */
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/*
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*---------------------------------------------------------------------------
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*
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* Tcl_DbNewByteArrayObj --
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*
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* This procedure is normally called when debugging: i.e., when
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* TCL_MEM_DEBUG is defined. It is the same as the Tcl_NewByteArrayObj
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* above except that it calls Tcl_DbCkalloc directly with the file name
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* and line number from its caller. This simplifies debugging since then
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* the checkmem command will report the correct file name and line number
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* when reporting objects that haven't been freed.
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*
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* When TCL_MEM_DEBUG is not defined, this procedure just returns the
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* result of calling Tcl_NewByteArrayObj.
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*
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* Results:
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* The newly create object is returned. This object will have no
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* initial string representation. The returned object has a ref count
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* of 0.
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*
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* Side effects:
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* Memory allocated for new object and copy of byte array argument.
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*
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*---------------------------------------------------------------------------
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*/
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#ifdef TCL_MEM_DEBUG
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Tcl_Obj *
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Tcl_DbNewByteArrayObj(bytes, length, file, line)
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unsigned char *bytes; /* The array of bytes used to initialize
|
185 |
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* the new object. */
|
186 |
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int length; /* Length of the array of bytes, which must
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* be >= 0. */
|
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char *file; /* The name of the source file calling this
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* procedure; used for debugging. */
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int line; /* Line number in the source file; used
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* for debugging. */
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{
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Tcl_Obj *objPtr;
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TclDbNewObj(objPtr, file, line);
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Tcl_SetByteArrayObj(objPtr, bytes, length);
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return objPtr;
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}
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#else /* if not TCL_MEM_DEBUG */
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201 |
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Tcl_Obj *
|
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Tcl_DbNewByteArrayObj(bytes, length, file, line)
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unsigned char *bytes; /* The array of bytes used to initialize
|
205 |
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* the new object. */
|
206 |
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int length; /* Length of the array of bytes, which must
|
207 |
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* be >= 0. */
|
208 |
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char *file; /* The name of the source file calling this
|
209 |
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* procedure; used for debugging. */
|
210 |
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int line; /* Line number in the source file; used
|
211 |
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* for debugging. */
|
212 |
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{
|
213 |
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return Tcl_NewByteArrayObj(bytes, length);
|
214 |
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}
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#endif /* TCL_MEM_DEBUG */
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216 |
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|
217 |
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/*
|
218 |
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*---------------------------------------------------------------------------
|
219 |
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*
|
220 |
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* Tcl_SetByteArrayObj --
|
221 |
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*
|
222 |
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* Modify an object to be a ByteArray object and to have the specified
|
223 |
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* array of bytes as its value.
|
224 |
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*
|
225 |
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* Results:
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226 |
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* None.
|
227 |
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*
|
228 |
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* Side effects:
|
229 |
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* The object's old string rep and internal rep is freed.
|
230 |
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* Memory allocated for copy of byte array argument.
|
231 |
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*
|
232 |
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*----------------------------------------------------------------------
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233 |
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*/
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234 |
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|
235 |
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void
|
236 |
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Tcl_SetByteArrayObj(objPtr, bytes, length)
|
237 |
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Tcl_Obj *objPtr; /* Object to initialize as a ByteArray. */
|
238 |
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unsigned char *bytes; /* The array of bytes to use as the new
|
239 |
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* value. */
|
240 |
|
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int length; /* Length of the array of bytes, which must
|
241 |
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* be >= 0. */
|
242 |
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{
|
243 |
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Tcl_ObjType *typePtr;
|
244 |
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ByteArray *byteArrayPtr;
|
245 |
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|
246 |
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if (Tcl_IsShared(objPtr)) {
|
247 |
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panic("Tcl_SetByteArrayObj called with shared object");
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248 |
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}
|
249 |
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typePtr = objPtr->typePtr;
|
250 |
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if ((typePtr != NULL) && (typePtr->freeIntRepProc != NULL)) {
|
251 |
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(*typePtr->freeIntRepProc)(objPtr);
|
252 |
|
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}
|
253 |
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Tcl_InvalidateStringRep(objPtr);
|
254 |
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|
255 |
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byteArrayPtr = (ByteArray *) ckalloc(BYTEARRAY_SIZE(length));
|
256 |
|
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byteArrayPtr->used = length;
|
257 |
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byteArrayPtr->allocated = length;
|
258 |
|
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memcpy((VOID *) byteArrayPtr->bytes, (VOID *) bytes, (size_t) length);
|
259 |
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|
260 |
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objPtr->typePtr = &tclByteArrayType;
|
261 |
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SET_BYTEARRAY(objPtr, byteArrayPtr);
|
262 |
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}
|
263 |
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|
264 |
|
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/*
|
265 |
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*----------------------------------------------------------------------
|
266 |
|
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*
|
267 |
|
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* Tcl_GetByteArrayFromObj --
|
268 |
|
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*
|
269 |
|
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* Attempt to get the array of bytes from the Tcl object. If the
|
270 |
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* object is not already a ByteArray object, an attempt will be
|
271 |
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* made to convert it to one.
|
272 |
|
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*
|
273 |
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* Results:
|
274 |
|
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* Pointer to array of bytes representing the ByteArray object.
|
275 |
|
|
*
|
276 |
|
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* Side effects:
|
277 |
|
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* Frees old internal rep. Allocates memory for new internal rep.
|
278 |
|
|
*
|
279 |
|
|
*----------------------------------------------------------------------
|
280 |
|
|
*/
|
281 |
|
|
|
282 |
|
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unsigned char *
|
283 |
|
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Tcl_GetByteArrayFromObj(objPtr, lengthPtr)
|
284 |
|
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Tcl_Obj *objPtr; /* The ByteArray object. */
|
285 |
|
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int *lengthPtr; /* If non-NULL, filled with length of the
|
286 |
|
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* array of bytes in the ByteArray object. */
|
287 |
|
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{
|
288 |
|
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ByteArray *baPtr;
|
289 |
|
|
|
290 |
|
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SetByteArrayFromAny(NULL, objPtr);
|
291 |
|
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baPtr = GET_BYTEARRAY(objPtr);
|
292 |
|
|
|
293 |
|
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if (lengthPtr != NULL) {
|
294 |
|
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*lengthPtr = baPtr->used;
|
295 |
|
|
}
|
296 |
|
|
return (unsigned char *) baPtr->bytes;
|
297 |
|
|
}
|
298 |
|
|
|
299 |
|
|
/*
|
300 |
|
|
*----------------------------------------------------------------------
|
301 |
|
|
*
|
302 |
|
|
* Tcl_SetByteArrayLength --
|
303 |
|
|
*
|
304 |
|
|
* This procedure changes the length of the byte array for this
|
305 |
|
|
* object. Once the caller has set the length of the array, it
|
306 |
|
|
* is acceptable to directly modify the bytes in the array up until
|
307 |
|
|
* Tcl_GetStringFromObj() has been called on this object.
|
308 |
|
|
*
|
309 |
|
|
* Results:
|
310 |
|
|
* The new byte array of the specified length.
|
311 |
|
|
*
|
312 |
|
|
* Side effects:
|
313 |
|
|
* Allocates enough memory for an array of bytes of the requested
|
314 |
|
|
* size. When growing the array, the old array is copied to the
|
315 |
|
|
* new array; new bytes are undefined. When shrinking, the
|
316 |
|
|
* old array is truncated to the specified length.
|
317 |
|
|
*
|
318 |
|
|
*---------------------------------------------------------------------------
|
319 |
|
|
*/
|
320 |
|
|
|
321 |
|
|
unsigned char *
|
322 |
|
|
Tcl_SetByteArrayLength(objPtr, length)
|
323 |
|
|
Tcl_Obj *objPtr; /* The ByteArray object. */
|
324 |
|
|
int length; /* New length for internal byte array. */
|
325 |
|
|
{
|
326 |
|
|
ByteArray *byteArrayPtr, *newByteArrayPtr;
|
327 |
|
|
|
328 |
|
|
if (Tcl_IsShared(objPtr)) {
|
329 |
|
|
panic("Tcl_SetObjLength called with shared object");
|
330 |
|
|
}
|
331 |
|
|
if (objPtr->typePtr != &tclByteArrayType) {
|
332 |
|
|
SetByteArrayFromAny(NULL, objPtr);
|
333 |
|
|
}
|
334 |
|
|
|
335 |
|
|
byteArrayPtr = GET_BYTEARRAY(objPtr);
|
336 |
|
|
if (length > byteArrayPtr->allocated) {
|
337 |
|
|
newByteArrayPtr = (ByteArray *) ckalloc(BYTEARRAY_SIZE(length));
|
338 |
|
|
newByteArrayPtr->used = length;
|
339 |
|
|
newByteArrayPtr->allocated = length;
|
340 |
|
|
memcpy((VOID *) newByteArrayPtr->bytes,
|
341 |
|
|
(VOID *) byteArrayPtr->bytes, (size_t) byteArrayPtr->used);
|
342 |
|
|
ckfree((char *) byteArrayPtr);
|
343 |
|
|
byteArrayPtr = newByteArrayPtr;
|
344 |
|
|
SET_BYTEARRAY(objPtr, byteArrayPtr);
|
345 |
|
|
}
|
346 |
|
|
Tcl_InvalidateStringRep(objPtr);
|
347 |
|
|
byteArrayPtr->used = length;
|
348 |
|
|
return byteArrayPtr->bytes;
|
349 |
|
|
}
|
350 |
|
|
|
351 |
|
|
/*
|
352 |
|
|
*---------------------------------------------------------------------------
|
353 |
|
|
*
|
354 |
|
|
* SetByteArrayFromAny --
|
355 |
|
|
*
|
356 |
|
|
* Generate the ByteArray internal rep from the string rep.
|
357 |
|
|
*
|
358 |
|
|
* Results:
|
359 |
|
|
* The return value is always TCL_OK.
|
360 |
|
|
*
|
361 |
|
|
* Side effects:
|
362 |
|
|
* A ByteArray object is stored as the internal rep of objPtr.
|
363 |
|
|
*
|
364 |
|
|
*---------------------------------------------------------------------------
|
365 |
|
|
*/
|
366 |
|
|
|
367 |
|
|
static int
|
368 |
|
|
SetByteArrayFromAny(interp, objPtr)
|
369 |
|
|
Tcl_Interp *interp; /* Not used. */
|
370 |
|
|
Tcl_Obj *objPtr; /* The object to convert to type ByteArray. */
|
371 |
|
|
{
|
372 |
|
|
Tcl_ObjType *typePtr;
|
373 |
|
|
int length;
|
374 |
|
|
char *src, *srcEnd;
|
375 |
|
|
unsigned char *dst;
|
376 |
|
|
ByteArray *byteArrayPtr;
|
377 |
|
|
Tcl_UniChar ch;
|
378 |
|
|
|
379 |
|
|
typePtr = objPtr->typePtr;
|
380 |
|
|
if (typePtr != &tclByteArrayType) {
|
381 |
|
|
src = Tcl_GetStringFromObj(objPtr, &length);
|
382 |
|
|
srcEnd = src + length;
|
383 |
|
|
|
384 |
|
|
byteArrayPtr = (ByteArray *) ckalloc(BYTEARRAY_SIZE(length));
|
385 |
|
|
for (dst = byteArrayPtr->bytes; src < srcEnd; ) {
|
386 |
|
|
src += Tcl_UtfToUniChar(src, &ch);
|
387 |
|
|
*dst++ = (unsigned char) ch;
|
388 |
|
|
}
|
389 |
|
|
|
390 |
|
|
byteArrayPtr->used = dst - byteArrayPtr->bytes;
|
391 |
|
|
byteArrayPtr->allocated = length;
|
392 |
|
|
|
393 |
|
|
if ((typePtr != NULL) && (typePtr->freeIntRepProc) != NULL) {
|
394 |
|
|
(*typePtr->freeIntRepProc)(objPtr);
|
395 |
|
|
}
|
396 |
|
|
objPtr->typePtr = &tclByteArrayType;
|
397 |
|
|
SET_BYTEARRAY(objPtr, byteArrayPtr);
|
398 |
|
|
}
|
399 |
|
|
return TCL_OK;
|
400 |
|
|
}
|
401 |
|
|
|
402 |
|
|
/*
|
403 |
|
|
*----------------------------------------------------------------------
|
404 |
|
|
*
|
405 |
|
|
* FreeByteArrayInternalRep --
|
406 |
|
|
*
|
407 |
|
|
* Deallocate the storage associated with a ByteArray data object's
|
408 |
|
|
* internal representation.
|
409 |
|
|
*
|
410 |
|
|
* Results:
|
411 |
|
|
* None.
|
412 |
|
|
*
|
413 |
|
|
* Side effects:
|
414 |
|
|
* Frees memory.
|
415 |
|
|
*
|
416 |
|
|
*----------------------------------------------------------------------
|
417 |
|
|
*/
|
418 |
|
|
|
419 |
|
|
static void
|
420 |
|
|
FreeByteArrayInternalRep(objPtr)
|
421 |
|
|
Tcl_Obj *objPtr; /* Object with internal rep to free. */
|
422 |
|
|
{
|
423 |
|
|
ckfree((char *) GET_BYTEARRAY(objPtr));
|
424 |
|
|
}
|
425 |
|
|
|
426 |
|
|
/*
|
427 |
|
|
*---------------------------------------------------------------------------
|
428 |
|
|
*
|
429 |
|
|
* DupByteArrayInternalRep --
|
430 |
|
|
*
|
431 |
|
|
* Initialize the internal representation of a ByteArray Tcl_Obj
|
432 |
|
|
* to a copy of the internal representation of an existing ByteArray
|
433 |
|
|
* object.
|
434 |
|
|
*
|
435 |
|
|
* Results:
|
436 |
|
|
* None.
|
437 |
|
|
*
|
438 |
|
|
* Side effects:
|
439 |
|
|
* Allocates memory.
|
440 |
|
|
*
|
441 |
|
|
*---------------------------------------------------------------------------
|
442 |
|
|
*/
|
443 |
|
|
|
444 |
|
|
static void
|
445 |
|
|
DupByteArrayInternalRep(srcPtr, copyPtr)
|
446 |
|
|
Tcl_Obj *srcPtr; /* Object with internal rep to copy. */
|
447 |
|
|
Tcl_Obj *copyPtr; /* Object with internal rep to set. */
|
448 |
|
|
{
|
449 |
|
|
int length;
|
450 |
|
|
ByteArray *srcArrayPtr, *copyArrayPtr;
|
451 |
|
|
|
452 |
|
|
srcArrayPtr = GET_BYTEARRAY(srcPtr);
|
453 |
|
|
length = srcArrayPtr->used;
|
454 |
|
|
|
455 |
|
|
copyArrayPtr = (ByteArray *) ckalloc(BYTEARRAY_SIZE(length));
|
456 |
|
|
copyArrayPtr->used = length;
|
457 |
|
|
copyArrayPtr->allocated = length;
|
458 |
|
|
memcpy((VOID *) copyArrayPtr->bytes, (VOID *) srcArrayPtr->bytes,
|
459 |
|
|
(size_t) length);
|
460 |
|
|
SET_BYTEARRAY(copyPtr, copyArrayPtr);
|
461 |
|
|
|
462 |
|
|
copyPtr->typePtr = &tclByteArrayType;
|
463 |
|
|
}
|
464 |
|
|
|
465 |
|
|
/*
|
466 |
|
|
*---------------------------------------------------------------------------
|
467 |
|
|
*
|
468 |
|
|
* UpdateStringOfByteArray --
|
469 |
|
|
*
|
470 |
|
|
* Update the string representation for a ByteArray data object.
|
471 |
|
|
* Note: This procedure does not invalidate an existing old string rep
|
472 |
|
|
* so storage will be lost if this has not already been done.
|
473 |
|
|
*
|
474 |
|
|
* Results:
|
475 |
|
|
* None.
|
476 |
|
|
*
|
477 |
|
|
* Side effects:
|
478 |
|
|
* The object's string is set to a valid string that results from
|
479 |
|
|
* the ByteArray-to-string conversion.
|
480 |
|
|
*
|
481 |
|
|
* The object becomes a string object -- the internal rep is
|
482 |
|
|
* discarded and the typePtr becomes NULL.
|
483 |
|
|
*
|
484 |
|
|
*---------------------------------------------------------------------------
|
485 |
|
|
*/
|
486 |
|
|
|
487 |
|
|
static void
|
488 |
|
|
UpdateStringOfByteArray(objPtr)
|
489 |
|
|
Tcl_Obj *objPtr; /* ByteArray object whose string rep to
|
490 |
|
|
* update. */
|
491 |
|
|
{
|
492 |
|
|
int i, length, size;
|
493 |
|
|
unsigned char *src;
|
494 |
|
|
char *dst;
|
495 |
|
|
ByteArray *byteArrayPtr;
|
496 |
|
|
|
497 |
|
|
byteArrayPtr = GET_BYTEARRAY(objPtr);
|
498 |
|
|
src = byteArrayPtr->bytes;
|
499 |
|
|
length = byteArrayPtr->used;
|
500 |
|
|
|
501 |
|
|
/*
|
502 |
|
|
* How much space will string rep need?
|
503 |
|
|
*/
|
504 |
|
|
|
505 |
|
|
size = length;
|
506 |
|
|
for (i = 0; i < length; i++) {
|
507 |
|
|
if ((src[i] == 0) || (src[i] > 127)) {
|
508 |
|
|
size++;
|
509 |
|
|
}
|
510 |
|
|
}
|
511 |
|
|
|
512 |
|
|
dst = (char *) ckalloc((unsigned) (size + 1));
|
513 |
|
|
objPtr->bytes = dst;
|
514 |
|
|
objPtr->length = size;
|
515 |
|
|
|
516 |
|
|
if (size == length) {
|
517 |
|
|
memcpy((VOID *) dst, (VOID *) src, (size_t) size);
|
518 |
|
|
dst[size] = '\0';
|
519 |
|
|
} else {
|
520 |
|
|
for (i = 0; i < length; i++) {
|
521 |
|
|
dst += Tcl_UniCharToUtf(src[i], dst);
|
522 |
|
|
}
|
523 |
|
|
*dst = '\0';
|
524 |
|
|
}
|
525 |
|
|
}
|
526 |
|
|
|
527 |
|
|
/*
|
528 |
|
|
*----------------------------------------------------------------------
|
529 |
|
|
*
|
530 |
|
|
* Tcl_BinaryObjCmd --
|
531 |
|
|
*
|
532 |
|
|
* This procedure implements the "binary" Tcl command.
|
533 |
|
|
*
|
534 |
|
|
* Results:
|
535 |
|
|
* A standard Tcl result.
|
536 |
|
|
*
|
537 |
|
|
* Side effects:
|
538 |
|
|
* See the user documentation.
|
539 |
|
|
*
|
540 |
|
|
*----------------------------------------------------------------------
|
541 |
|
|
*/
|
542 |
|
|
|
543 |
|
|
int
|
544 |
|
|
Tcl_BinaryObjCmd(dummy, interp, objc, objv)
|
545 |
|
|
ClientData dummy; /* Not used. */
|
546 |
|
|
Tcl_Interp *interp; /* Current interpreter. */
|
547 |
|
|
int objc; /* Number of arguments. */
|
548 |
|
|
Tcl_Obj *CONST objv[]; /* Argument objects. */
|
549 |
|
|
{
|
550 |
|
|
int arg; /* Index of next argument to consume. */
|
551 |
|
|
int value = 0; /* Current integer value to be packed.
|
552 |
|
|
* Initialized to avoid compiler warning. */
|
553 |
|
|
char cmd; /* Current format character. */
|
554 |
|
|
int count; /* Count associated with current format
|
555 |
|
|
* character. */
|
556 |
|
|
char *format; /* Pointer to current position in format
|
557 |
|
|
* string. */
|
558 |
|
|
Tcl_Obj *resultPtr; /* Object holding result buffer. */
|
559 |
|
|
unsigned char *buffer; /* Start of result buffer. */
|
560 |
|
|
unsigned char *cursor; /* Current position within result buffer. */
|
561 |
|
|
unsigned char *maxPos; /* Greatest position within result buffer that
|
562 |
|
|
* cursor has visited.*/
|
563 |
|
|
char *errorString, *errorValue, *str;
|
564 |
|
|
int offset, size, length, index;
|
565 |
|
|
static char *options[] = {
|
566 |
|
|
"format", "scan", NULL
|
567 |
|
|
};
|
568 |
|
|
enum options {
|
569 |
|
|
BINARY_FORMAT, BINARY_SCAN
|
570 |
|
|
};
|
571 |
|
|
|
572 |
|
|
if (objc < 2) {
|
573 |
|
|
Tcl_WrongNumArgs(interp, 1, objv, "option ?arg arg ...?");
|
574 |
|
|
return TCL_ERROR;
|
575 |
|
|
}
|
576 |
|
|
|
577 |
|
|
if (Tcl_GetIndexFromObj(interp, objv[1], options, "option", 0,
|
578 |
|
|
&index) != TCL_OK) {
|
579 |
|
|
return TCL_ERROR;
|
580 |
|
|
}
|
581 |
|
|
|
582 |
|
|
switch ((enum options) index) {
|
583 |
|
|
case BINARY_FORMAT: {
|
584 |
|
|
if (objc < 3) {
|
585 |
|
|
Tcl_WrongNumArgs(interp, 2, objv, "formatString ?arg arg ...?");
|
586 |
|
|
return TCL_ERROR;
|
587 |
|
|
}
|
588 |
|
|
|
589 |
|
|
/*
|
590 |
|
|
* To avoid copying the data, we format the string in two passes.
|
591 |
|
|
* The first pass computes the size of the output buffer. The
|
592 |
|
|
* second pass places the formatted data into the buffer.
|
593 |
|
|
*/
|
594 |
|
|
|
595 |
|
|
format = Tcl_GetString(objv[2]);
|
596 |
|
|
arg = 3;
|
597 |
|
|
offset = 0;
|
598 |
|
|
length = 0;
|
599 |
|
|
while (*format != '\0') {
|
600 |
|
|
str = format;
|
601 |
|
|
if (!GetFormatSpec(&format, &cmd, &count)) {
|
602 |
|
|
break;
|
603 |
|
|
}
|
604 |
|
|
switch (cmd) {
|
605 |
|
|
case 'a':
|
606 |
|
|
case 'A':
|
607 |
|
|
case 'b':
|
608 |
|
|
case 'B':
|
609 |
|
|
case 'h':
|
610 |
|
|
case 'H': {
|
611 |
|
|
/*
|
612 |
|
|
* For string-type specifiers, the count corresponds
|
613 |
|
|
* to the number of bytes in a single argument.
|
614 |
|
|
*/
|
615 |
|
|
|
616 |
|
|
if (arg >= objc) {
|
617 |
|
|
goto badIndex;
|
618 |
|
|
}
|
619 |
|
|
if (count == BINARY_ALL) {
|
620 |
|
|
Tcl_GetByteArrayFromObj(objv[arg], &count);
|
621 |
|
|
} else if (count == BINARY_NOCOUNT) {
|
622 |
|
|
count = 1;
|
623 |
|
|
}
|
624 |
|
|
arg++;
|
625 |
|
|
if (cmd == 'a' || cmd == 'A') {
|
626 |
|
|
offset += count;
|
627 |
|
|
} else if (cmd == 'b' || cmd == 'B') {
|
628 |
|
|
offset += (count + 7) / 8;
|
629 |
|
|
} else {
|
630 |
|
|
offset += (count + 1) / 2;
|
631 |
|
|
}
|
632 |
|
|
break;
|
633 |
|
|
}
|
634 |
|
|
case 'c': {
|
635 |
|
|
size = 1;
|
636 |
|
|
goto doNumbers;
|
637 |
|
|
}
|
638 |
|
|
case 's':
|
639 |
|
|
case 'S': {
|
640 |
|
|
size = 2;
|
641 |
|
|
goto doNumbers;
|
642 |
|
|
}
|
643 |
|
|
case 'i':
|
644 |
|
|
case 'I': {
|
645 |
|
|
size = 4;
|
646 |
|
|
goto doNumbers;
|
647 |
|
|
}
|
648 |
|
|
case 'f': {
|
649 |
|
|
size = sizeof(float);
|
650 |
|
|
goto doNumbers;
|
651 |
|
|
}
|
652 |
|
|
case 'd': {
|
653 |
|
|
size = sizeof(double);
|
654 |
|
|
|
655 |
|
|
doNumbers:
|
656 |
|
|
if (arg >= objc) {
|
657 |
|
|
goto badIndex;
|
658 |
|
|
}
|
659 |
|
|
|
660 |
|
|
/*
|
661 |
|
|
* For number-type specifiers, the count corresponds
|
662 |
|
|
* to the number of elements in the list stored in
|
663 |
|
|
* a single argument. If no count is specified, then
|
664 |
|
|
* the argument is taken as a single non-list value.
|
665 |
|
|
*/
|
666 |
|
|
|
667 |
|
|
if (count == BINARY_NOCOUNT) {
|
668 |
|
|
arg++;
|
669 |
|
|
count = 1;
|
670 |
|
|
} else {
|
671 |
|
|
int listc;
|
672 |
|
|
Tcl_Obj **listv;
|
673 |
|
|
if (Tcl_ListObjGetElements(interp, objv[arg++],
|
674 |
|
|
&listc, &listv) != TCL_OK) {
|
675 |
|
|
return TCL_ERROR;
|
676 |
|
|
}
|
677 |
|
|
if (count == BINARY_ALL) {
|
678 |
|
|
count = listc;
|
679 |
|
|
} else if (count > listc) {
|
680 |
|
|
Tcl_AppendResult(interp,
|
681 |
|
|
"number of elements in list does not match count",
|
682 |
|
|
(char *) NULL);
|
683 |
|
|
return TCL_ERROR;
|
684 |
|
|
}
|
685 |
|
|
}
|
686 |
|
|
offset += count*size;
|
687 |
|
|
break;
|
688 |
|
|
}
|
689 |
|
|
case 'x': {
|
690 |
|
|
if (count == BINARY_ALL) {
|
691 |
|
|
Tcl_AppendResult(interp,
|
692 |
|
|
"cannot use \"*\" in format string with \"x\"",
|
693 |
|
|
(char *) NULL);
|
694 |
|
|
return TCL_ERROR;
|
695 |
|
|
} else if (count == BINARY_NOCOUNT) {
|
696 |
|
|
count = 1;
|
697 |
|
|
}
|
698 |
|
|
offset += count;
|
699 |
|
|
break;
|
700 |
|
|
}
|
701 |
|
|
case 'X': {
|
702 |
|
|
if (count == BINARY_NOCOUNT) {
|
703 |
|
|
count = 1;
|
704 |
|
|
}
|
705 |
|
|
if ((count > offset) || (count == BINARY_ALL)) {
|
706 |
|
|
count = offset;
|
707 |
|
|
}
|
708 |
|
|
if (offset > length) {
|
709 |
|
|
length = offset;
|
710 |
|
|
}
|
711 |
|
|
offset -= count;
|
712 |
|
|
break;
|
713 |
|
|
}
|
714 |
|
|
case '@': {
|
715 |
|
|
if (offset > length) {
|
716 |
|
|
length = offset;
|
717 |
|
|
}
|
718 |
|
|
if (count == BINARY_ALL) {
|
719 |
|
|
offset = length;
|
720 |
|
|
} else if (count == BINARY_NOCOUNT) {
|
721 |
|
|
goto badCount;
|
722 |
|
|
} else {
|
723 |
|
|
offset = count;
|
724 |
|
|
}
|
725 |
|
|
break;
|
726 |
|
|
}
|
727 |
|
|
default: {
|
728 |
|
|
errorString = str;
|
729 |
|
|
goto badfield;
|
730 |
|
|
}
|
731 |
|
|
}
|
732 |
|
|
}
|
733 |
|
|
if (offset > length) {
|
734 |
|
|
length = offset;
|
735 |
|
|
}
|
736 |
|
|
if (length == 0) {
|
737 |
|
|
return TCL_OK;
|
738 |
|
|
}
|
739 |
|
|
|
740 |
|
|
/*
|
741 |
|
|
* Prepare the result object by preallocating the caclulated
|
742 |
|
|
* number of bytes and filling with nulls.
|
743 |
|
|
*/
|
744 |
|
|
|
745 |
|
|
resultPtr = Tcl_GetObjResult(interp);
|
746 |
|
|
buffer = Tcl_SetByteArrayLength(resultPtr, length);
|
747 |
|
|
memset((VOID *) buffer, 0, (size_t) length);
|
748 |
|
|
|
749 |
|
|
/*
|
750 |
|
|
* Pack the data into the result object. Note that we can skip
|
751 |
|
|
* the error checking during this pass, since we have already
|
752 |
|
|
* parsed the string once.
|
753 |
|
|
*/
|
754 |
|
|
|
755 |
|
|
arg = 3;
|
756 |
|
|
format = Tcl_GetString(objv[2]);
|
757 |
|
|
cursor = buffer;
|
758 |
|
|
maxPos = cursor;
|
759 |
|
|
while (*format != 0) {
|
760 |
|
|
if (!GetFormatSpec(&format, &cmd, &count)) {
|
761 |
|
|
break;
|
762 |
|
|
}
|
763 |
|
|
if ((count == 0) && (cmd != '@')) {
|
764 |
|
|
arg++;
|
765 |
|
|
continue;
|
766 |
|
|
}
|
767 |
|
|
switch (cmd) {
|
768 |
|
|
case 'a':
|
769 |
|
|
case 'A': {
|
770 |
|
|
char pad = (char) (cmd == 'a' ? '\0' : ' ');
|
771 |
|
|
unsigned char *bytes;
|
772 |
|
|
|
773 |
|
|
bytes = Tcl_GetByteArrayFromObj(objv[arg++], &length);
|
774 |
|
|
|
775 |
|
|
if (count == BINARY_ALL) {
|
776 |
|
|
count = length;
|
777 |
|
|
} else if (count == BINARY_NOCOUNT) {
|
778 |
|
|
count = 1;
|
779 |
|
|
}
|
780 |
|
|
if (length >= count) {
|
781 |
|
|
memcpy((VOID *) cursor, (VOID *) bytes,
|
782 |
|
|
(size_t) count);
|
783 |
|
|
} else {
|
784 |
|
|
memcpy((VOID *) cursor, (VOID *) bytes,
|
785 |
|
|
(size_t) length);
|
786 |
|
|
memset((VOID *) (cursor + length), pad,
|
787 |
|
|
(size_t) (count - length));
|
788 |
|
|
}
|
789 |
|
|
cursor += count;
|
790 |
|
|
break;
|
791 |
|
|
}
|
792 |
|
|
case 'b':
|
793 |
|
|
case 'B': {
|
794 |
|
|
unsigned char *last;
|
795 |
|
|
|
796 |
|
|
str = Tcl_GetStringFromObj(objv[arg++], &length);
|
797 |
|
|
if (count == BINARY_ALL) {
|
798 |
|
|
count = length;
|
799 |
|
|
} else if (count == BINARY_NOCOUNT) {
|
800 |
|
|
count = 1;
|
801 |
|
|
}
|
802 |
|
|
last = cursor + ((count + 7) / 8);
|
803 |
|
|
if (count > length) {
|
804 |
|
|
count = length;
|
805 |
|
|
}
|
806 |
|
|
value = 0;
|
807 |
|
|
errorString = "binary";
|
808 |
|
|
if (cmd == 'B') {
|
809 |
|
|
for (offset = 0; offset < count; offset++) {
|
810 |
|
|
value <<= 1;
|
811 |
|
|
if (str[offset] == '1') {
|
812 |
|
|
value |= 1;
|
813 |
|
|
} else if (str[offset] != '0') {
|
814 |
|
|
errorValue = str;
|
815 |
|
|
goto badValue;
|
816 |
|
|
}
|
817 |
|
|
if (((offset + 1) % 8) == 0) {
|
818 |
|
|
*cursor++ = (unsigned char) value;
|
819 |
|
|
value = 0;
|
820 |
|
|
}
|
821 |
|
|
}
|
822 |
|
|
} else {
|
823 |
|
|
for (offset = 0; offset < count; offset++) {
|
824 |
|
|
value >>= 1;
|
825 |
|
|
if (str[offset] == '1') {
|
826 |
|
|
value |= 128;
|
827 |
|
|
} else if (str[offset] != '0') {
|
828 |
|
|
errorValue = str;
|
829 |
|
|
goto badValue;
|
830 |
|
|
}
|
831 |
|
|
if (!((offset + 1) % 8)) {
|
832 |
|
|
*cursor++ = (unsigned char) value;
|
833 |
|
|
value = 0;
|
834 |
|
|
}
|
835 |
|
|
}
|
836 |
|
|
}
|
837 |
|
|
if ((offset % 8) != 0) {
|
838 |
|
|
if (cmd == 'B') {
|
839 |
|
|
value <<= 8 - (offset % 8);
|
840 |
|
|
} else {
|
841 |
|
|
value >>= 8 - (offset % 8);
|
842 |
|
|
}
|
843 |
|
|
*cursor++ = (unsigned char) value;
|
844 |
|
|
}
|
845 |
|
|
while (cursor < last) {
|
846 |
|
|
*cursor++ = '\0';
|
847 |
|
|
}
|
848 |
|
|
break;
|
849 |
|
|
}
|
850 |
|
|
case 'h':
|
851 |
|
|
case 'H': {
|
852 |
|
|
unsigned char *last;
|
853 |
|
|
int c;
|
854 |
|
|
|
855 |
|
|
str = Tcl_GetStringFromObj(objv[arg++], &length);
|
856 |
|
|
if (count == BINARY_ALL) {
|
857 |
|
|
count = length;
|
858 |
|
|
} else if (count == BINARY_NOCOUNT) {
|
859 |
|
|
count = 1;
|
860 |
|
|
}
|
861 |
|
|
last = cursor + ((count + 1) / 2);
|
862 |
|
|
if (count > length) {
|
863 |
|
|
count = length;
|
864 |
|
|
}
|
865 |
|
|
value = 0;
|
866 |
|
|
errorString = "hexadecimal";
|
867 |
|
|
if (cmd == 'H') {
|
868 |
|
|
for (offset = 0; offset < count; offset++) {
|
869 |
|
|
value <<= 4;
|
870 |
|
|
if (!isxdigit(UCHAR(str[offset]))) { /* INTL: digit */
|
871 |
|
|
errorValue = str;
|
872 |
|
|
goto badValue;
|
873 |
|
|
}
|
874 |
|
|
c = str[offset] - '0';
|
875 |
|
|
if (c > 9) {
|
876 |
|
|
c += ('0' - 'A') + 10;
|
877 |
|
|
}
|
878 |
|
|
if (c > 16) {
|
879 |
|
|
c += ('A' - 'a');
|
880 |
|
|
}
|
881 |
|
|
value |= (c & 0xf);
|
882 |
|
|
if (offset % 2) {
|
883 |
|
|
*cursor++ = (char) value;
|
884 |
|
|
value = 0;
|
885 |
|
|
}
|
886 |
|
|
}
|
887 |
|
|
} else {
|
888 |
|
|
for (offset = 0; offset < count; offset++) {
|
889 |
|
|
value >>= 4;
|
890 |
|
|
|
891 |
|
|
if (!isxdigit(UCHAR(str[offset]))) { /* INTL: digit */
|
892 |
|
|
errorValue = str;
|
893 |
|
|
goto badValue;
|
894 |
|
|
}
|
895 |
|
|
c = str[offset] - '0';
|
896 |
|
|
if (c > 9) {
|
897 |
|
|
c += ('0' - 'A') + 10;
|
898 |
|
|
}
|
899 |
|
|
if (c > 16) {
|
900 |
|
|
c += ('A' - 'a');
|
901 |
|
|
}
|
902 |
|
|
value |= ((c << 4) & 0xf0);
|
903 |
|
|
if (offset % 2) {
|
904 |
|
|
*cursor++ = (unsigned char)(value & 0xff);
|
905 |
|
|
value = 0;
|
906 |
|
|
}
|
907 |
|
|
}
|
908 |
|
|
}
|
909 |
|
|
if (offset % 2) {
|
910 |
|
|
if (cmd == 'H') {
|
911 |
|
|
value <<= 4;
|
912 |
|
|
} else {
|
913 |
|
|
value >>= 4;
|
914 |
|
|
}
|
915 |
|
|
*cursor++ = (unsigned char) value;
|
916 |
|
|
}
|
917 |
|
|
|
918 |
|
|
while (cursor < last) {
|
919 |
|
|
*cursor++ = '\0';
|
920 |
|
|
}
|
921 |
|
|
break;
|
922 |
|
|
}
|
923 |
|
|
case 'c':
|
924 |
|
|
case 's':
|
925 |
|
|
case 'S':
|
926 |
|
|
case 'i':
|
927 |
|
|
case 'I':
|
928 |
|
|
case 'd':
|
929 |
|
|
case 'f': {
|
930 |
|
|
int listc, i;
|
931 |
|
|
Tcl_Obj **listv;
|
932 |
|
|
|
933 |
|
|
if (count == BINARY_NOCOUNT) {
|
934 |
|
|
/*
|
935 |
|
|
* Note that we are casting away the const-ness of
|
936 |
|
|
* objv, but this is safe since we aren't going to
|
937 |
|
|
* modify the array.
|
938 |
|
|
*/
|
939 |
|
|
|
940 |
|
|
listv = (Tcl_Obj**)(objv + arg);
|
941 |
|
|
listc = 1;
|
942 |
|
|
count = 1;
|
943 |
|
|
} else {
|
944 |
|
|
Tcl_ListObjGetElements(interp, objv[arg],
|
945 |
|
|
&listc, &listv);
|
946 |
|
|
if (count == BINARY_ALL) {
|
947 |
|
|
count = listc;
|
948 |
|
|
}
|
949 |
|
|
}
|
950 |
|
|
arg++;
|
951 |
|
|
for (i = 0; i < count; i++) {
|
952 |
|
|
if (FormatNumber(interp, cmd, listv[i], &cursor)
|
953 |
|
|
!= TCL_OK) {
|
954 |
|
|
return TCL_ERROR;
|
955 |
|
|
}
|
956 |
|
|
}
|
957 |
|
|
break;
|
958 |
|
|
}
|
959 |
|
|
case 'x': {
|
960 |
|
|
if (count == BINARY_NOCOUNT) {
|
961 |
|
|
count = 1;
|
962 |
|
|
}
|
963 |
|
|
memset(cursor, 0, (size_t) count);
|
964 |
|
|
cursor += count;
|
965 |
|
|
break;
|
966 |
|
|
}
|
967 |
|
|
case 'X': {
|
968 |
|
|
if (cursor > maxPos) {
|
969 |
|
|
maxPos = cursor;
|
970 |
|
|
}
|
971 |
|
|
if (count == BINARY_NOCOUNT) {
|
972 |
|
|
count = 1;
|
973 |
|
|
}
|
974 |
|
|
if ((count == BINARY_ALL)
|
975 |
|
|
|| (count > (cursor - buffer))) {
|
976 |
|
|
cursor = buffer;
|
977 |
|
|
} else {
|
978 |
|
|
cursor -= count;
|
979 |
|
|
}
|
980 |
|
|
break;
|
981 |
|
|
}
|
982 |
|
|
case '@': {
|
983 |
|
|
if (cursor > maxPos) {
|
984 |
|
|
maxPos = cursor;
|
985 |
|
|
}
|
986 |
|
|
if (count == BINARY_ALL) {
|
987 |
|
|
cursor = maxPos;
|
988 |
|
|
} else {
|
989 |
|
|
cursor = buffer + count;
|
990 |
|
|
}
|
991 |
|
|
break;
|
992 |
|
|
}
|
993 |
|
|
}
|
994 |
|
|
}
|
995 |
|
|
break;
|
996 |
|
|
}
|
997 |
|
|
case BINARY_SCAN: {
|
998 |
|
|
int i;
|
999 |
|
|
Tcl_Obj *valuePtr, *elementPtr;
|
1000 |
|
|
|
1001 |
|
|
if (objc < 4) {
|
1002 |
|
|
Tcl_WrongNumArgs(interp, 2, objv,
|
1003 |
|
|
"value formatString ?varName varName ...?");
|
1004 |
|
|
return TCL_ERROR;
|
1005 |
|
|
}
|
1006 |
|
|
buffer = Tcl_GetByteArrayFromObj(objv[2], &length);
|
1007 |
|
|
format = Tcl_GetString(objv[3]);
|
1008 |
|
|
cursor = buffer;
|
1009 |
|
|
arg = 4;
|
1010 |
|
|
offset = 0;
|
1011 |
|
|
while (*format != '\0') {
|
1012 |
|
|
str = format;
|
1013 |
|
|
if (!GetFormatSpec(&format, &cmd, &count)) {
|
1014 |
|
|
goto done;
|
1015 |
|
|
}
|
1016 |
|
|
switch (cmd) {
|
1017 |
|
|
case 'a':
|
1018 |
|
|
case 'A': {
|
1019 |
|
|
unsigned char *src;
|
1020 |
|
|
|
1021 |
|
|
if (arg >= objc) {
|
1022 |
|
|
goto badIndex;
|
1023 |
|
|
}
|
1024 |
|
|
if (count == BINARY_ALL) {
|
1025 |
|
|
count = length - offset;
|
1026 |
|
|
} else {
|
1027 |
|
|
if (count == BINARY_NOCOUNT) {
|
1028 |
|
|
count = 1;
|
1029 |
|
|
}
|
1030 |
|
|
if (count > (length - offset)) {
|
1031 |
|
|
goto done;
|
1032 |
|
|
}
|
1033 |
|
|
}
|
1034 |
|
|
|
1035 |
|
|
src = buffer + offset;
|
1036 |
|
|
size = count;
|
1037 |
|
|
|
1038 |
|
|
/*
|
1039 |
|
|
* Trim trailing nulls and spaces, if necessary.
|
1040 |
|
|
*/
|
1041 |
|
|
|
1042 |
|
|
if (cmd == 'A') {
|
1043 |
|
|
while (size > 0) {
|
1044 |
|
|
if (src[size-1] != '\0' && src[size-1] != ' ') {
|
1045 |
|
|
break;
|
1046 |
|
|
}
|
1047 |
|
|
size--;
|
1048 |
|
|
}
|
1049 |
|
|
}
|
1050 |
|
|
valuePtr = Tcl_NewByteArrayObj(src, size);
|
1051 |
|
|
resultPtr = Tcl_ObjSetVar2(interp, objv[arg],
|
1052 |
|
|
NULL, valuePtr, TCL_LEAVE_ERR_MSG);
|
1053 |
|
|
arg++;
|
1054 |
|
|
if (resultPtr == NULL) {
|
1055 |
|
|
Tcl_DecrRefCount(valuePtr); /* unneeded */
|
1056 |
|
|
return TCL_ERROR;
|
1057 |
|
|
}
|
1058 |
|
|
offset += count;
|
1059 |
|
|
break;
|
1060 |
|
|
}
|
1061 |
|
|
case 'b':
|
1062 |
|
|
case 'B': {
|
1063 |
|
|
unsigned char *src;
|
1064 |
|
|
char *dest;
|
1065 |
|
|
|
1066 |
|
|
if (arg >= objc) {
|
1067 |
|
|
goto badIndex;
|
1068 |
|
|
}
|
1069 |
|
|
if (count == BINARY_ALL) {
|
1070 |
|
|
count = (length - offset) * 8;
|
1071 |
|
|
} else {
|
1072 |
|
|
if (count == BINARY_NOCOUNT) {
|
1073 |
|
|
count = 1;
|
1074 |
|
|
}
|
1075 |
|
|
if (count > (length - offset) * 8) {
|
1076 |
|
|
goto done;
|
1077 |
|
|
}
|
1078 |
|
|
}
|
1079 |
|
|
src = buffer + offset;
|
1080 |
|
|
valuePtr = Tcl_NewObj();
|
1081 |
|
|
Tcl_SetObjLength(valuePtr, count);
|
1082 |
|
|
dest = Tcl_GetString(valuePtr);
|
1083 |
|
|
|
1084 |
|
|
if (cmd == 'b') {
|
1085 |
|
|
for (i = 0; i < count; i++) {
|
1086 |
|
|
if (i % 8) {
|
1087 |
|
|
value >>= 1;
|
1088 |
|
|
} else {
|
1089 |
|
|
value = *src++;
|
1090 |
|
|
}
|
1091 |
|
|
*dest++ = (char) ((value & 1) ? '1' : '0');
|
1092 |
|
|
}
|
1093 |
|
|
} else {
|
1094 |
|
|
for (i = 0; i < count; i++) {
|
1095 |
|
|
if (i % 8) {
|
1096 |
|
|
value <<= 1;
|
1097 |
|
|
} else {
|
1098 |
|
|
value = *src++;
|
1099 |
|
|
}
|
1100 |
|
|
*dest++ = (char) ((value & 0x80) ? '1' : '0');
|
1101 |
|
|
}
|
1102 |
|
|
}
|
1103 |
|
|
|
1104 |
|
|
resultPtr = Tcl_ObjSetVar2(interp, objv[arg],
|
1105 |
|
|
NULL, valuePtr, TCL_LEAVE_ERR_MSG);
|
1106 |
|
|
arg++;
|
1107 |
|
|
if (resultPtr == NULL) {
|
1108 |
|
|
Tcl_DecrRefCount(valuePtr); /* unneeded */
|
1109 |
|
|
return TCL_ERROR;
|
1110 |
|
|
}
|
1111 |
|
|
offset += (count + 7 ) / 8;
|
1112 |
|
|
break;
|
1113 |
|
|
}
|
1114 |
|
|
case 'h':
|
1115 |
|
|
case 'H': {
|
1116 |
|
|
char *dest;
|
1117 |
|
|
unsigned char *src;
|
1118 |
|
|
int i;
|
1119 |
|
|
static char hexdigit[] = "0123456789abcdef";
|
1120 |
|
|
|
1121 |
|
|
if (arg >= objc) {
|
1122 |
|
|
goto badIndex;
|
1123 |
|
|
}
|
1124 |
|
|
if (count == BINARY_ALL) {
|
1125 |
|
|
count = (length - offset)*2;
|
1126 |
|
|
} else {
|
1127 |
|
|
if (count == BINARY_NOCOUNT) {
|
1128 |
|
|
count = 1;
|
1129 |
|
|
}
|
1130 |
|
|
if (count > (length - offset)*2) {
|
1131 |
|
|
goto done;
|
1132 |
|
|
}
|
1133 |
|
|
}
|
1134 |
|
|
src = buffer + offset;
|
1135 |
|
|
valuePtr = Tcl_NewObj();
|
1136 |
|
|
Tcl_SetObjLength(valuePtr, count);
|
1137 |
|
|
dest = Tcl_GetString(valuePtr);
|
1138 |
|
|
|
1139 |
|
|
if (cmd == 'h') {
|
1140 |
|
|
for (i = 0; i < count; i++) {
|
1141 |
|
|
if (i % 2) {
|
1142 |
|
|
value >>= 4;
|
1143 |
|
|
} else {
|
1144 |
|
|
value = *src++;
|
1145 |
|
|
}
|
1146 |
|
|
*dest++ = hexdigit[value & 0xf];
|
1147 |
|
|
}
|
1148 |
|
|
} else {
|
1149 |
|
|
for (i = 0; i < count; i++) {
|
1150 |
|
|
if (i % 2) {
|
1151 |
|
|
value <<= 4;
|
1152 |
|
|
} else {
|
1153 |
|
|
value = *src++;
|
1154 |
|
|
}
|
1155 |
|
|
*dest++ = hexdigit[(value >> 4) & 0xf];
|
1156 |
|
|
}
|
1157 |
|
|
}
|
1158 |
|
|
|
1159 |
|
|
resultPtr = Tcl_ObjSetVar2(interp, objv[arg],
|
1160 |
|
|
NULL, valuePtr, TCL_LEAVE_ERR_MSG);
|
1161 |
|
|
arg++;
|
1162 |
|
|
if (resultPtr == NULL) {
|
1163 |
|
|
Tcl_DecrRefCount(valuePtr); /* unneeded */
|
1164 |
|
|
return TCL_ERROR;
|
1165 |
|
|
}
|
1166 |
|
|
offset += (count + 1) / 2;
|
1167 |
|
|
break;
|
1168 |
|
|
}
|
1169 |
|
|
case 'c': {
|
1170 |
|
|
size = 1;
|
1171 |
|
|
goto scanNumber;
|
1172 |
|
|
}
|
1173 |
|
|
case 's':
|
1174 |
|
|
case 'S': {
|
1175 |
|
|
size = 2;
|
1176 |
|
|
goto scanNumber;
|
1177 |
|
|
}
|
1178 |
|
|
case 'i':
|
1179 |
|
|
case 'I': {
|
1180 |
|
|
size = 4;
|
1181 |
|
|
goto scanNumber;
|
1182 |
|
|
}
|
1183 |
|
|
case 'f': {
|
1184 |
|
|
size = sizeof(float);
|
1185 |
|
|
goto scanNumber;
|
1186 |
|
|
}
|
1187 |
|
|
case 'd': {
|
1188 |
|
|
unsigned char *src;
|
1189 |
|
|
|
1190 |
|
|
size = sizeof(double);
|
1191 |
|
|
/* fall through */
|
1192 |
|
|
|
1193 |
|
|
scanNumber:
|
1194 |
|
|
if (arg >= objc) {
|
1195 |
|
|
goto badIndex;
|
1196 |
|
|
}
|
1197 |
|
|
if (count == BINARY_NOCOUNT) {
|
1198 |
|
|
if ((length - offset) < size) {
|
1199 |
|
|
goto done;
|
1200 |
|
|
}
|
1201 |
|
|
valuePtr = ScanNumber(buffer+offset, cmd);
|
1202 |
|
|
offset += size;
|
1203 |
|
|
} else {
|
1204 |
|
|
if (count == BINARY_ALL) {
|
1205 |
|
|
count = (length - offset) / size;
|
1206 |
|
|
}
|
1207 |
|
|
if ((length - offset) < (count * size)) {
|
1208 |
|
|
goto done;
|
1209 |
|
|
}
|
1210 |
|
|
valuePtr = Tcl_NewObj();
|
1211 |
|
|
src = buffer+offset;
|
1212 |
|
|
for (i = 0; i < count; i++) {
|
1213 |
|
|
elementPtr = ScanNumber(src, cmd);
|
1214 |
|
|
src += size;
|
1215 |
|
|
Tcl_ListObjAppendElement(NULL, valuePtr,
|
1216 |
|
|
elementPtr);
|
1217 |
|
|
}
|
1218 |
|
|
offset += count*size;
|
1219 |
|
|
}
|
1220 |
|
|
|
1221 |
|
|
resultPtr = Tcl_ObjSetVar2(interp, objv[arg],
|
1222 |
|
|
NULL, valuePtr, TCL_LEAVE_ERR_MSG);
|
1223 |
|
|
arg++;
|
1224 |
|
|
if (resultPtr == NULL) {
|
1225 |
|
|
Tcl_DecrRefCount(valuePtr); /* unneeded */
|
1226 |
|
|
return TCL_ERROR;
|
1227 |
|
|
}
|
1228 |
|
|
break;
|
1229 |
|
|
}
|
1230 |
|
|
case 'x': {
|
1231 |
|
|
if (count == BINARY_NOCOUNT) {
|
1232 |
|
|
count = 1;
|
1233 |
|
|
}
|
1234 |
|
|
if ((count == BINARY_ALL)
|
1235 |
|
|
|| (count > (length - offset))) {
|
1236 |
|
|
offset = length;
|
1237 |
|
|
} else {
|
1238 |
|
|
offset += count;
|
1239 |
|
|
}
|
1240 |
|
|
break;
|
1241 |
|
|
}
|
1242 |
|
|
case 'X': {
|
1243 |
|
|
if (count == BINARY_NOCOUNT) {
|
1244 |
|
|
count = 1;
|
1245 |
|
|
}
|
1246 |
|
|
if ((count == BINARY_ALL) || (count > offset)) {
|
1247 |
|
|
offset = 0;
|
1248 |
|
|
} else {
|
1249 |
|
|
offset -= count;
|
1250 |
|
|
}
|
1251 |
|
|
break;
|
1252 |
|
|
}
|
1253 |
|
|
case '@': {
|
1254 |
|
|
if (count == BINARY_NOCOUNT) {
|
1255 |
|
|
goto badCount;
|
1256 |
|
|
}
|
1257 |
|
|
if ((count == BINARY_ALL) || (count > length)) {
|
1258 |
|
|
offset = length;
|
1259 |
|
|
} else {
|
1260 |
|
|
offset = count;
|
1261 |
|
|
}
|
1262 |
|
|
break;
|
1263 |
|
|
}
|
1264 |
|
|
default: {
|
1265 |
|
|
errorString = str;
|
1266 |
|
|
goto badfield;
|
1267 |
|
|
}
|
1268 |
|
|
}
|
1269 |
|
|
}
|
1270 |
|
|
|
1271 |
|
|
/*
|
1272 |
|
|
* Set the result to the last position of the cursor.
|
1273 |
|
|
*/
|
1274 |
|
|
|
1275 |
|
|
done:
|
1276 |
|
|
Tcl_ResetResult(interp);
|
1277 |
|
|
Tcl_SetLongObj(Tcl_GetObjResult(interp), arg - 4);
|
1278 |
|
|
break;
|
1279 |
|
|
}
|
1280 |
|
|
}
|
1281 |
|
|
return TCL_OK;
|
1282 |
|
|
|
1283 |
|
|
badValue:
|
1284 |
|
|
Tcl_ResetResult(interp);
|
1285 |
|
|
Tcl_AppendStringsToObj(Tcl_GetObjResult(interp), "expected ", errorString,
|
1286 |
|
|
" string but got \"", errorValue, "\" instead", NULL);
|
1287 |
|
|
return TCL_ERROR;
|
1288 |
|
|
|
1289 |
|
|
badCount:
|
1290 |
|
|
errorString = "missing count for \"@\" field specifier";
|
1291 |
|
|
goto error;
|
1292 |
|
|
|
1293 |
|
|
badIndex:
|
1294 |
|
|
errorString = "not enough arguments for all format specifiers";
|
1295 |
|
|
goto error;
|
1296 |
|
|
|
1297 |
|
|
badfield: {
|
1298 |
|
|
Tcl_UniChar ch;
|
1299 |
|
|
char buf[TCL_UTF_MAX + 1];
|
1300 |
|
|
|
1301 |
|
|
Tcl_UtfToUniChar(errorString, &ch);
|
1302 |
|
|
buf[Tcl_UniCharToUtf(ch, buf)] = '\0';
|
1303 |
|
|
Tcl_AppendResult(interp, "bad field specifier \"", buf, "\"", NULL);
|
1304 |
|
|
return TCL_ERROR;
|
1305 |
|
|
}
|
1306 |
|
|
|
1307 |
|
|
error:
|
1308 |
|
|
Tcl_AppendResult(interp, errorString, NULL);
|
1309 |
|
|
return TCL_ERROR;
|
1310 |
|
|
}
|
1311 |
|
|
|
1312 |
|
|
/*
|
1313 |
|
|
*----------------------------------------------------------------------
|
1314 |
|
|
*
|
1315 |
|
|
* GetFormatSpec --
|
1316 |
|
|
*
|
1317 |
|
|
* This function parses the format strings used in the binary
|
1318 |
|
|
* format and scan commands.
|
1319 |
|
|
*
|
1320 |
|
|
* Results:
|
1321 |
|
|
* Moves the formatPtr to the start of the next command. Returns
|
1322 |
|
|
* the current command character and count in cmdPtr and countPtr.
|
1323 |
|
|
* The count is set to BINARY_ALL if the count character was '*'
|
1324 |
|
|
* or BINARY_NOCOUNT if no count was specified. Returns 1 on
|
1325 |
|
|
* success, or 0 if the string did not have a format specifier.
|
1326 |
|
|
*
|
1327 |
|
|
* Side effects:
|
1328 |
|
|
* None.
|
1329 |
|
|
*
|
1330 |
|
|
*----------------------------------------------------------------------
|
1331 |
|
|
*/
|
1332 |
|
|
|
1333 |
|
|
static int
|
1334 |
|
|
GetFormatSpec(formatPtr, cmdPtr, countPtr)
|
1335 |
|
|
char **formatPtr; /* Pointer to format string. */
|
1336 |
|
|
char *cmdPtr; /* Pointer to location of command char. */
|
1337 |
|
|
int *countPtr; /* Pointer to repeat count value. */
|
1338 |
|
|
{
|
1339 |
|
|
/*
|
1340 |
|
|
* Skip any leading blanks.
|
1341 |
|
|
*/
|
1342 |
|
|
|
1343 |
|
|
while (**formatPtr == ' ') {
|
1344 |
|
|
(*formatPtr)++;
|
1345 |
|
|
}
|
1346 |
|
|
|
1347 |
|
|
/*
|
1348 |
|
|
* The string was empty, except for whitespace, so fail.
|
1349 |
|
|
*/
|
1350 |
|
|
|
1351 |
|
|
if (!(**formatPtr)) {
|
1352 |
|
|
return 0;
|
1353 |
|
|
}
|
1354 |
|
|
|
1355 |
|
|
/*
|
1356 |
|
|
* Extract the command character and any trailing digits or '*'.
|
1357 |
|
|
*/
|
1358 |
|
|
|
1359 |
|
|
*cmdPtr = **formatPtr;
|
1360 |
|
|
(*formatPtr)++;
|
1361 |
|
|
if (**formatPtr == '*') {
|
1362 |
|
|
(*formatPtr)++;
|
1363 |
|
|
(*countPtr) = BINARY_ALL;
|
1364 |
|
|
} else if (isdigit(UCHAR(**formatPtr))) { /* INTL: digit */
|
1365 |
|
|
(*countPtr) = strtoul(*formatPtr, formatPtr, 10);
|
1366 |
|
|
} else {
|
1367 |
|
|
(*countPtr) = BINARY_NOCOUNT;
|
1368 |
|
|
}
|
1369 |
|
|
return 1;
|
1370 |
|
|
}
|
1371 |
|
|
|
1372 |
|
|
/*
|
1373 |
|
|
*----------------------------------------------------------------------
|
1374 |
|
|
*
|
1375 |
|
|
* FormatNumber --
|
1376 |
|
|
*
|
1377 |
|
|
* This routine is called by Tcl_BinaryObjCmd to format a number
|
1378 |
|
|
* into a location pointed at by cursor.
|
1379 |
|
|
*
|
1380 |
|
|
* Results:
|
1381 |
|
|
* A standard Tcl result.
|
1382 |
|
|
*
|
1383 |
|
|
* Side effects:
|
1384 |
|
|
* Moves the cursor to the next location to be written into.
|
1385 |
|
|
*
|
1386 |
|
|
*----------------------------------------------------------------------
|
1387 |
|
|
*/
|
1388 |
|
|
|
1389 |
|
|
static int
|
1390 |
|
|
FormatNumber(interp, type, src, cursorPtr)
|
1391 |
|
|
Tcl_Interp *interp; /* Current interpreter, used to report
|
1392 |
|
|
* errors. */
|
1393 |
|
|
int type; /* Type of number to format. */
|
1394 |
|
|
Tcl_Obj *src; /* Number to format. */
|
1395 |
|
|
unsigned char **cursorPtr; /* Pointer to index into destination buffer. */
|
1396 |
|
|
{
|
1397 |
|
|
int value;
|
1398 |
|
|
double dvalue;
|
1399 |
|
|
|
1400 |
|
|
if ((type == 'd') || (type == 'f')) {
|
1401 |
|
|
/*
|
1402 |
|
|
* For floating point types, we need to copy the data using
|
1403 |
|
|
* memcpy to avoid alignment issues.
|
1404 |
|
|
*/
|
1405 |
|
|
|
1406 |
|
|
if (Tcl_GetDoubleFromObj(interp, src, &dvalue) != TCL_OK) {
|
1407 |
|
|
return TCL_ERROR;
|
1408 |
|
|
}
|
1409 |
|
|
if (type == 'd') {
|
1410 |
|
|
memcpy((VOID *) *cursorPtr, (VOID *) &dvalue, sizeof(double));
|
1411 |
|
|
*cursorPtr += sizeof(double);
|
1412 |
|
|
} else {
|
1413 |
|
|
float fvalue;
|
1414 |
|
|
|
1415 |
|
|
/*
|
1416 |
|
|
* Because some compilers will generate floating point exceptions
|
1417 |
|
|
* on an overflow cast (e.g. Borland), we restrict the values
|
1418 |
|
|
* to the valid range for float.
|
1419 |
|
|
*/
|
1420 |
|
|
|
1421 |
|
|
if (fabs(dvalue) > (double)FLT_MAX) {
|
1422 |
|
|
fvalue = (dvalue >= 0.0) ? FLT_MAX : -FLT_MAX;
|
1423 |
|
|
} else {
|
1424 |
|
|
fvalue = (float) dvalue;
|
1425 |
|
|
}
|
1426 |
|
|
memcpy((VOID *) *cursorPtr, (VOID *) &fvalue, sizeof(float));
|
1427 |
|
|
*cursorPtr += sizeof(float);
|
1428 |
|
|
}
|
1429 |
|
|
} else {
|
1430 |
|
|
if (Tcl_GetIntFromObj(interp, src, &value) != TCL_OK) {
|
1431 |
|
|
return TCL_ERROR;
|
1432 |
|
|
}
|
1433 |
|
|
if (type == 'c') {
|
1434 |
|
|
*(*cursorPtr)++ = (unsigned char) value;
|
1435 |
|
|
} else if (type == 's') {
|
1436 |
|
|
*(*cursorPtr)++ = (unsigned char) value;
|
1437 |
|
|
*(*cursorPtr)++ = (unsigned char) (value >> 8);
|
1438 |
|
|
} else if (type == 'S') {
|
1439 |
|
|
*(*cursorPtr)++ = (unsigned char) (value >> 8);
|
1440 |
|
|
*(*cursorPtr)++ = (unsigned char) value;
|
1441 |
|
|
} else if (type == 'i') {
|
1442 |
|
|
*(*cursorPtr)++ = (unsigned char) value;
|
1443 |
|
|
*(*cursorPtr)++ = (unsigned char) (value >> 8);
|
1444 |
|
|
*(*cursorPtr)++ = (unsigned char) (value >> 16);
|
1445 |
|
|
*(*cursorPtr)++ = (unsigned char) (value >> 24);
|
1446 |
|
|
} else if (type == 'I') {
|
1447 |
|
|
*(*cursorPtr)++ = (unsigned char) (value >> 24);
|
1448 |
|
|
*(*cursorPtr)++ = (unsigned char) (value >> 16);
|
1449 |
|
|
*(*cursorPtr)++ = (unsigned char) (value >> 8);
|
1450 |
|
|
*(*cursorPtr)++ = (unsigned char) value;
|
1451 |
|
|
}
|
1452 |
|
|
}
|
1453 |
|
|
return TCL_OK;
|
1454 |
|
|
}
|
1455 |
|
|
|
1456 |
|
|
/*
|
1457 |
|
|
*----------------------------------------------------------------------
|
1458 |
|
|
*
|
1459 |
|
|
* ScanNumber --
|
1460 |
|
|
*
|
1461 |
|
|
* This routine is called by Tcl_BinaryObjCmd to scan a number
|
1462 |
|
|
* out of a buffer.
|
1463 |
|
|
*
|
1464 |
|
|
* Results:
|
1465 |
|
|
* Returns a newly created object containing the scanned number.
|
1466 |
|
|
* This object has a ref count of zero.
|
1467 |
|
|
*
|
1468 |
|
|
* Side effects:
|
1469 |
|
|
* None.
|
1470 |
|
|
*
|
1471 |
|
|
*----------------------------------------------------------------------
|
1472 |
|
|
*/
|
1473 |
|
|
|
1474 |
|
|
static Tcl_Obj *
|
1475 |
|
|
ScanNumber(buffer, type)
|
1476 |
|
|
unsigned char *buffer; /* Buffer to scan number from. */
|
1477 |
|
|
int type; /* Format character from "binary scan" */
|
1478 |
|
|
{
|
1479 |
|
|
long value;
|
1480 |
|
|
|
1481 |
|
|
/*
|
1482 |
|
|
* We cannot rely on the compiler to properly sign extend integer values
|
1483 |
|
|
* when we cast from smaller values to larger values because we don't know
|
1484 |
|
|
* the exact size of the integer types. So, we have to handle sign
|
1485 |
|
|
* extension explicitly by checking the high bit and padding with 1's as
|
1486 |
|
|
* needed.
|
1487 |
|
|
*/
|
1488 |
|
|
|
1489 |
|
|
switch (type) {
|
1490 |
|
|
case 'c': {
|
1491 |
|
|
/*
|
1492 |
|
|
* Characters need special handling. We want to produce a
|
1493 |
|
|
* signed result, but on some platforms (such as AIX) chars
|
1494 |
|
|
* are unsigned. To deal with this, check for a value that
|
1495 |
|
|
* should be negative but isn't.
|
1496 |
|
|
*/
|
1497 |
|
|
|
1498 |
|
|
value = buffer[0];
|
1499 |
|
|
if (value & 0x80) {
|
1500 |
|
|
value |= -0x100;
|
1501 |
|
|
}
|
1502 |
|
|
return Tcl_NewLongObj((long)value);
|
1503 |
|
|
}
|
1504 |
|
|
case 's': {
|
1505 |
|
|
value = (long) (buffer[0] + (buffer[1] << 8));
|
1506 |
|
|
goto shortValue;
|
1507 |
|
|
}
|
1508 |
|
|
case 'S': {
|
1509 |
|
|
value = (long) (buffer[1] + (buffer[0] << 8));
|
1510 |
|
|
shortValue:
|
1511 |
|
|
if (value & 0x8000) {
|
1512 |
|
|
value |= -0x10000;
|
1513 |
|
|
}
|
1514 |
|
|
return Tcl_NewLongObj(value);
|
1515 |
|
|
}
|
1516 |
|
|
case 'i': {
|
1517 |
|
|
value = (long) (buffer[0]
|
1518 |
|
|
+ (buffer[1] << 8)
|
1519 |
|
|
+ (buffer[2] << 16)
|
1520 |
|
|
+ (buffer[3] << 24));
|
1521 |
|
|
goto intValue;
|
1522 |
|
|
}
|
1523 |
|
|
case 'I': {
|
1524 |
|
|
value = (long) (buffer[3]
|
1525 |
|
|
+ (buffer[2] << 8)
|
1526 |
|
|
+ (buffer[1] << 16)
|
1527 |
|
|
+ (buffer[0] << 24));
|
1528 |
|
|
intValue:
|
1529 |
|
|
/*
|
1530 |
|
|
* Check to see if the value was sign extended properly on
|
1531 |
|
|
* systems where an int is more than 32-bits.
|
1532 |
|
|
*/
|
1533 |
|
|
|
1534 |
|
|
if ((value & (((unsigned int)1)<<31)) && (value > 0)) {
|
1535 |
|
|
value -= (((unsigned int)1)<<31);
|
1536 |
|
|
value -= (((unsigned int)1)<<31);
|
1537 |
|
|
}
|
1538 |
|
|
return Tcl_NewLongObj(value);
|
1539 |
|
|
}
|
1540 |
|
|
case 'f': {
|
1541 |
|
|
float fvalue;
|
1542 |
|
|
memcpy((VOID *) &fvalue, (VOID *) buffer, sizeof(float));
|
1543 |
|
|
return Tcl_NewDoubleObj(fvalue);
|
1544 |
|
|
}
|
1545 |
|
|
case 'd': {
|
1546 |
|
|
double dvalue;
|
1547 |
|
|
memcpy((VOID *) &dvalue, (VOID *) buffer, sizeof(double));
|
1548 |
|
|
return Tcl_NewDoubleObj(dvalue);
|
1549 |
|
|
}
|
1550 |
|
|
}
|
1551 |
|
|
return NULL;
|
1552 |
|
|
}
|
1553 |
|
|
|
1554 |
dashley |
66 |
/* End of tclbinary.c */
|