3393 lines
82 KiB
C
3393 lines
82 KiB
C
/*
|
||
* tclStringObj.c --
|
||
*
|
||
* This file contains functions that implement string operations on Tcl
|
||
* objects. Some string operations work with UTF strings and others
|
||
* require Unicode format. Functions that require knowledge of the width
|
||
* of each character, such as indexing, operate on Unicode data.
|
||
*
|
||
* A Unicode string is an internationalized string. Conceptually, a
|
||
* Unicode string is an array of 16-bit quantities organized as a
|
||
* sequence of properly formed UTF-8 characters. There is a one-to-one
|
||
* map between Unicode and UTF characters. Because Unicode characters
|
||
* have a fixed width, operations such as indexing operate on Unicode
|
||
* data. The String object is optimized for the case where each UTF char
|
||
* in a string is only one byte. In this case, we store the value of
|
||
* numChars, but we don't store the Unicode data (unless Tcl_GetUnicode
|
||
* is explicitly called).
|
||
*
|
||
* The String object type stores one or both formats. The default
|
||
* behavior is to store UTF. Once Unicode is calculated by a function, it
|
||
* is stored in the internal rep for future access (without an additional
|
||
* O(n) cost).
|
||
*
|
||
* To allow many appends to be done to an object without constantly
|
||
* reallocating the space for the string or Unicode representation, we
|
||
* allocate double the space for the string or Unicode and use the
|
||
* internal representation to keep track of how much space is used vs.
|
||
* allocated.
|
||
*
|
||
* Copyright (c) 1995-1997 Sun Microsystems, Inc.
|
||
* Copyright (c) 1999 by Scriptics Corporation.
|
||
*
|
||
* See the file "license.terms" for information on usage and redistribution of
|
||
* this file, and for a DISCLAIMER OF ALL WARRANTIES.
|
||
*/
|
||
|
||
#include "tclInt.h"
|
||
#include "tommath.h"
|
||
#include "tclStringRep.h"
|
||
|
||
/*
|
||
* Set COMPAT to 1 to restore the shimmering patterns to those of Tcl 8.5.
|
||
* This is an escape hatch in case the changes have some unexpected unwelcome
|
||
* impact on performance. If things go well, this mechanism can go away when
|
||
* post-8.6 development begins.
|
||
*/
|
||
|
||
#define COMPAT 0
|
||
|
||
/*
|
||
* Prototypes for functions defined later in this file:
|
||
*/
|
||
|
||
static void AppendPrintfToObjVA(Tcl_Obj *objPtr,
|
||
const char *format, va_list argList);
|
||
static void AppendUnicodeToUnicodeRep(Tcl_Obj *objPtr,
|
||
const Tcl_UniChar *unicode, int appendNumChars);
|
||
static void AppendUnicodeToUtfRep(Tcl_Obj *objPtr,
|
||
const Tcl_UniChar *unicode, int numChars);
|
||
static void AppendUtfToUnicodeRep(Tcl_Obj *objPtr,
|
||
const char *bytes, int numBytes);
|
||
static void AppendUtfToUtfRep(Tcl_Obj *objPtr,
|
||
const char *bytes, int numBytes);
|
||
static void DupStringInternalRep(Tcl_Obj *objPtr,
|
||
Tcl_Obj *copyPtr);
|
||
static int ExtendStringRepWithUnicode(Tcl_Obj *objPtr,
|
||
const Tcl_UniChar *unicode, int numChars);
|
||
static void ExtendUnicodeRepWithString(Tcl_Obj *objPtr,
|
||
const char *bytes, int numBytes,
|
||
int numAppendChars);
|
||
static void FillUnicodeRep(Tcl_Obj *objPtr);
|
||
static void FreeStringInternalRep(Tcl_Obj *objPtr);
|
||
static void GrowStringBuffer(Tcl_Obj *objPtr, int needed, int flag);
|
||
static void GrowUnicodeBuffer(Tcl_Obj *objPtr, int needed);
|
||
static int SetStringFromAny(Tcl_Interp *interp, Tcl_Obj *objPtr);
|
||
static void SetUnicodeObj(Tcl_Obj *objPtr,
|
||
const Tcl_UniChar *unicode, int numChars);
|
||
static int UnicodeLength(const Tcl_UniChar *unicode);
|
||
static void UpdateStringOfString(Tcl_Obj *objPtr);
|
||
|
||
/*
|
||
* The structure below defines the string Tcl object type by means of
|
||
* functions that can be invoked by generic object code.
|
||
*/
|
||
|
||
const Tcl_ObjType tclStringType = {
|
||
"string", /* name */
|
||
FreeStringInternalRep, /* freeIntRepPro */
|
||
DupStringInternalRep, /* dupIntRepProc */
|
||
UpdateStringOfString, /* updateStringProc */
|
||
SetStringFromAny /* setFromAnyProc */
|
||
};
|
||
|
||
/*
|
||
* TCL STRING GROWTH ALGORITHM
|
||
*
|
||
* When growing strings (during an append, for example), the following growth
|
||
* algorithm is used:
|
||
*
|
||
* Attempt to allocate 2 * (originalLength + appendLength)
|
||
* On failure:
|
||
* attempt to allocate originalLength + 2*appendLength + TCL_MIN_GROWTH
|
||
*
|
||
* This algorithm allows very good performance, as it rapidly increases the
|
||
* memory allocated for a given string, which minimizes the number of
|
||
* reallocations that must be performed. However, using only the doubling
|
||
* algorithm can lead to a significant waste of memory. In particular, it may
|
||
* fail even when there is sufficient memory available to complete the append
|
||
* request (but there is not 2*totalLength memory available). So when the
|
||
* doubling fails (because there is not enough memory available), the
|
||
* algorithm requests a smaller amount of memory, which is still enough to
|
||
* cover the request, but which hopefully will be less than the total
|
||
* available memory.
|
||
*
|
||
* The addition of TCL_MIN_GROWTH allows for efficient handling of very
|
||
* small appends. Without this extra slush factor, a sequence of several small
|
||
* appends would cause several memory allocations. As long as
|
||
* TCL_MIN_GROWTH is a reasonable size, we can avoid that behavior.
|
||
*
|
||
* The growth algorithm can be tuned by adjusting the following parameters:
|
||
*
|
||
* TCL_MIN_GROWTH Additional space, in bytes, to allocate when
|
||
* the double allocation has failed. Default is
|
||
* 1024 (1 kilobyte). See tclInt.h.
|
||
*/
|
||
|
||
#ifndef TCL_MIN_UNICHAR_GROWTH
|
||
#define TCL_MIN_UNICHAR_GROWTH TCL_MIN_GROWTH/sizeof(Tcl_UniChar)
|
||
#endif
|
||
|
||
static void
|
||
GrowStringBuffer(
|
||
Tcl_Obj *objPtr,
|
||
int needed,
|
||
int flag)
|
||
{
|
||
/*
|
||
* Pre-conditions:
|
||
* objPtr->typePtr == &tclStringType
|
||
* needed > stringPtr->allocated
|
||
* flag || objPtr->bytes != NULL
|
||
*/
|
||
|
||
String *stringPtr = GET_STRING(objPtr);
|
||
char *ptr = NULL;
|
||
int attempt;
|
||
|
||
if (objPtr->bytes == tclEmptyStringRep) {
|
||
objPtr->bytes = NULL;
|
||
}
|
||
if (flag == 0 || stringPtr->allocated > 0) {
|
||
if (needed <= INT_MAX / 2) {
|
||
attempt = 2 * needed;
|
||
ptr = (char *)attemptckrealloc(objPtr->bytes, attempt + 1);
|
||
}
|
||
if (ptr == NULL) {
|
||
/*
|
||
* Take care computing the amount of modest growth to avoid
|
||
* overflow into invalid argument values for attempt.
|
||
*/
|
||
|
||
unsigned int limit = INT_MAX - needed;
|
||
unsigned int extra = needed - objPtr->length + TCL_MIN_GROWTH;
|
||
int growth = (int) ((extra > limit) ? limit : extra);
|
||
|
||
attempt = needed + growth;
|
||
ptr = (char *)attemptckrealloc(objPtr->bytes, attempt + 1);
|
||
}
|
||
}
|
||
if (ptr == NULL) {
|
||
/*
|
||
* First allocation - just big enough; or last chance fallback.
|
||
*/
|
||
|
||
attempt = needed;
|
||
ptr = (char *)ckrealloc(objPtr->bytes, attempt + 1);
|
||
}
|
||
objPtr->bytes = ptr;
|
||
stringPtr->allocated = attempt;
|
||
}
|
||
|
||
static void
|
||
GrowUnicodeBuffer(
|
||
Tcl_Obj *objPtr,
|
||
int needed)
|
||
{
|
||
/*
|
||
* Pre-conditions:
|
||
* objPtr->typePtr == &tclStringType
|
||
* needed > stringPtr->maxChars
|
||
* needed < STRING_MAXCHARS
|
||
*/
|
||
|
||
String *ptr = NULL, *stringPtr = GET_STRING(objPtr);
|
||
int attempt;
|
||
|
||
if (stringPtr->maxChars > 0) {
|
||
/*
|
||
* Subsequent appends - apply the growth algorithm.
|
||
*/
|
||
|
||
if (needed <= STRING_MAXCHARS / 2) {
|
||
attempt = 2 * needed;
|
||
ptr = stringAttemptRealloc(stringPtr, attempt);
|
||
}
|
||
if (ptr == NULL) {
|
||
/*
|
||
* Take care computing the amount of modest growth to avoid
|
||
* overflow into invalid argument values for attempt.
|
||
*/
|
||
|
||
unsigned int limit = STRING_MAXCHARS - needed;
|
||
unsigned int extra = needed - stringPtr->numChars
|
||
+ TCL_MIN_UNICHAR_GROWTH;
|
||
int growth = (int) ((extra > limit) ? limit : extra);
|
||
|
||
attempt = needed + growth;
|
||
ptr = stringAttemptRealloc(stringPtr, attempt);
|
||
}
|
||
}
|
||
if (ptr == NULL) {
|
||
/*
|
||
* First allocation - just big enough; or last chance fallback.
|
||
*/
|
||
|
||
attempt = needed;
|
||
ptr = stringRealloc(stringPtr, attempt);
|
||
}
|
||
stringPtr = ptr;
|
||
stringPtr->maxChars = attempt;
|
||
SET_STRING(objPtr, stringPtr);
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* Tcl_NewStringObj --
|
||
*
|
||
* This function is normally called when not debugging: i.e., when
|
||
* TCL_MEM_DEBUG is not defined. It creates a new string object and
|
||
* initializes it from the byte pointer and length arguments.
|
||
*
|
||
* When TCL_MEM_DEBUG is defined, this function just returns the result
|
||
* of calling the debugging version Tcl_DbNewStringObj.
|
||
*
|
||
* Results:
|
||
* A newly created string object is returned that has ref count zero.
|
||
*
|
||
* Side effects:
|
||
* The new object's internal string representation will be set to a copy
|
||
* of the length bytes starting at "bytes". If "length" is negative, use
|
||
* bytes up to the first NUL byte; i.e., assume "bytes" points to a
|
||
* C-style NUL-terminated string. The object's type is set to NULL. An
|
||
* extra NUL is added to the end of the new object's byte array.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
#ifdef TCL_MEM_DEBUG
|
||
#undef Tcl_NewStringObj
|
||
Tcl_Obj *
|
||
Tcl_NewStringObj(
|
||
const char *bytes, /* Points to the first of the length bytes
|
||
* used to initialize the new object. */
|
||
int length) /* The number of bytes to copy from "bytes"
|
||
* when initializing the new object. If
|
||
* negative, use bytes up to the first NUL
|
||
* byte. */
|
||
{
|
||
return Tcl_DbNewStringObj(bytes, length, "unknown", 0);
|
||
}
|
||
#else /* if not TCL_MEM_DEBUG */
|
||
Tcl_Obj *
|
||
Tcl_NewStringObj(
|
||
const char *bytes, /* Points to the first of the length bytes
|
||
* used to initialize the new object. */
|
||
int length) /* The number of bytes to copy from "bytes"
|
||
* when initializing the new object. If
|
||
* negative, use bytes up to the first NUL
|
||
* byte. */
|
||
{
|
||
Tcl_Obj *objPtr;
|
||
|
||
if (length < 0) {
|
||
length = (bytes? strlen(bytes) : 0);
|
||
}
|
||
TclNewStringObj(objPtr, bytes, length);
|
||
return objPtr;
|
||
}
|
||
#endif /* TCL_MEM_DEBUG */
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* Tcl_DbNewStringObj --
|
||
*
|
||
* This function is normally called when debugging: i.e., when
|
||
* TCL_MEM_DEBUG is defined. It creates new string objects. It is the
|
||
* same as the Tcl_NewStringObj function above except that it calls
|
||
* Tcl_DbCkalloc directly with the file name and line number from its
|
||
* caller. This simplifies debugging since then the [memory active]
|
||
* command will report the correct file name and line number when
|
||
* reporting objects that haven't been freed.
|
||
*
|
||
* When TCL_MEM_DEBUG is not defined, this function just returns the
|
||
* result of calling Tcl_NewStringObj.
|
||
*
|
||
* Results:
|
||
* A newly created string object is returned that has ref count zero.
|
||
*
|
||
* Side effects:
|
||
* The new object's internal string representation will be set to a copy
|
||
* of the length bytes starting at "bytes". If "length" is negative, use
|
||
* bytes up to the first NUL byte; i.e., assume "bytes" points to a
|
||
* C-style NUL-terminated string. The object's type is set to NULL. An
|
||
* extra NUL is added to the end of the new object's byte array.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
#ifdef TCL_MEM_DEBUG
|
||
Tcl_Obj *
|
||
Tcl_DbNewStringObj(
|
||
const char *bytes, /* Points to the first of the length bytes
|
||
* used to initialize the new object. */
|
||
int length, /* The number of bytes to copy from "bytes"
|
||
* when initializing the new object. If
|
||
* negative, use bytes up to the first NUL
|
||
* byte. */
|
||
const char *file, /* The name of the source file calling this
|
||
* function; used for debugging. */
|
||
int line) /* Line number in the source file; used for
|
||
* debugging. */
|
||
{
|
||
Tcl_Obj *objPtr;
|
||
|
||
if (length < 0) {
|
||
length = (bytes? strlen(bytes) : 0);
|
||
}
|
||
TclDbNewObj(objPtr, file, line);
|
||
TclInitStringRep(objPtr, bytes, length);
|
||
return objPtr;
|
||
}
|
||
#else /* if not TCL_MEM_DEBUG */
|
||
Tcl_Obj *
|
||
Tcl_DbNewStringObj(
|
||
const char *bytes, /* Points to the first of the length bytes
|
||
* used to initialize the new object. */
|
||
int length, /* The number of bytes to copy from "bytes"
|
||
* when initializing the new object. If
|
||
* negative, use bytes up to the first NUL
|
||
* byte. */
|
||
const char *file, /* The name of the source file calling this
|
||
* function; used for debugging. */
|
||
int line) /* Line number in the source file; used for
|
||
* debugging. */
|
||
{
|
||
return Tcl_NewStringObj(bytes, length);
|
||
}
|
||
#endif /* TCL_MEM_DEBUG */
|
||
|
||
/*
|
||
*---------------------------------------------------------------------------
|
||
*
|
||
* Tcl_NewUnicodeObj --
|
||
*
|
||
* This function is creates a new String object and initializes it from
|
||
* the given Unicode String. If the Utf String is the same size as the
|
||
* Unicode string, don't duplicate the data.
|
||
*
|
||
* Results:
|
||
* The newly created object is returned. This object will have no initial
|
||
* string representation. The returned object has a ref count of 0.
|
||
*
|
||
* Side effects:
|
||
* Memory allocated for new object and copy of Unicode argument.
|
||
*
|
||
*---------------------------------------------------------------------------
|
||
*/
|
||
|
||
Tcl_Obj *
|
||
Tcl_NewUnicodeObj(
|
||
const Tcl_UniChar *unicode, /* The unicode string used to initialize the
|
||
* new object. */
|
||
int numChars) /* Number of characters in the unicode
|
||
* string. */
|
||
{
|
||
Tcl_Obj *objPtr;
|
||
|
||
TclNewObj(objPtr);
|
||
SetUnicodeObj(objPtr, unicode, numChars);
|
||
return objPtr;
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* Tcl_GetCharLength --
|
||
*
|
||
* Get the length of the Unicode string from the Tcl object.
|
||
*
|
||
* Results:
|
||
* Pointer to unicode string representing the unicode object.
|
||
*
|
||
* Side effects:
|
||
* Frees old internal rep. Allocates memory for new "String" internal
|
||
* rep.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
int
|
||
Tcl_GetCharLength(
|
||
Tcl_Obj *objPtr) /* The String object to get the num chars
|
||
* of. */
|
||
{
|
||
String *stringPtr;
|
||
int numChars;
|
||
|
||
/*
|
||
* Quick, no-shimmer return for short string reps.
|
||
*/
|
||
|
||
if ((objPtr->bytes) && (objPtr->length < 2)) {
|
||
/* 0 bytes -> 0 chars; 1 byte -> 1 char */
|
||
return objPtr->length;
|
||
}
|
||
|
||
/*
|
||
* Optimize the case where we're really dealing with a bytearray object;
|
||
* we don't need to convert to a string to perform the get-length operation.
|
||
*
|
||
* NOTE that we do not need the bytearray to be "pure". A ByteArray value
|
||
* with a string rep cannot be trusted to represent the same value as the
|
||
* string rep, but it *can* be trusted to have the same character length
|
||
* as the string rep, which is all this routine cares about.
|
||
*/
|
||
|
||
if (objPtr->typePtr == &tclByteArrayType) {
|
||
int length;
|
||
|
||
(void) Tcl_GetByteArrayFromObj(objPtr, &length);
|
||
return length;
|
||
}
|
||
|
||
/*
|
||
* OK, need to work with the object as a string.
|
||
*/
|
||
|
||
SetStringFromAny(NULL, objPtr);
|
||
stringPtr = GET_STRING(objPtr);
|
||
numChars = stringPtr->numChars;
|
||
|
||
/*
|
||
* If numChars is unknown, compute it.
|
||
*/
|
||
|
||
if (numChars == -1) {
|
||
TclNumUtfChars(numChars, objPtr->bytes, objPtr->length);
|
||
stringPtr->numChars = numChars;
|
||
|
||
#if COMPAT
|
||
if (numChars < objPtr->length) {
|
||
/*
|
||
* Since we've just computed the number of chars, and not all UTF
|
||
* chars are 1-byte long, go ahead and populate the unicode
|
||
* string.
|
||
*/
|
||
|
||
FillUnicodeRep(objPtr);
|
||
}
|
||
#endif
|
||
}
|
||
return numChars;
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* TclCheckEmptyString --
|
||
*
|
||
* Determine whether the string value of an object is or would be the
|
||
* empty string, without generating a string representation.
|
||
*
|
||
* Results:
|
||
* Returns 1 if empty, 0 if not, and -1 if unknown.
|
||
*
|
||
* Side effects:
|
||
* None.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
int
|
||
TclCheckEmptyString (
|
||
Tcl_Obj *objPtr)
|
||
{
|
||
int length = -1;
|
||
|
||
if (objPtr->bytes == tclEmptyStringRep) {
|
||
return TCL_EMPTYSTRING_YES;
|
||
}
|
||
|
||
if (TclIsPureList(objPtr)) {
|
||
Tcl_ListObjLength(NULL, objPtr, &length);
|
||
return length == 0;
|
||
}
|
||
|
||
if (TclIsPureDict(objPtr)) {
|
||
Tcl_DictObjSize(NULL, objPtr, &length);
|
||
return length == 0;
|
||
}
|
||
|
||
if (objPtr->bytes == NULL) {
|
||
return TCL_EMPTYSTRING_UNKNOWN;
|
||
}
|
||
return objPtr->length == 0;
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* Tcl_GetUniChar/TclGetUCS4 --
|
||
*
|
||
* Get the index'th Unicode character from the String object. If index
|
||
* is out of range, the result = 0xFFFD (Tcl_GetUniChar) resp. -1 (TclGetUCS4)
|
||
*
|
||
* Results:
|
||
* Returns the index'th Unicode character in the Object.
|
||
*
|
||
* Side effects:
|
||
* Fills unichar with the index'th Unicode character.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
Tcl_UniChar
|
||
Tcl_GetUniChar(
|
||
Tcl_Obj *objPtr, /* The object to get the Unicode charater
|
||
* from. */
|
||
int index) /* Get the index'th Unicode character. */
|
||
{
|
||
String *stringPtr;
|
||
int length;
|
||
|
||
if (index < 0) {
|
||
return 0xFFFD;
|
||
}
|
||
|
||
/*
|
||
* Optimize the case where we're really dealing with a bytearray object
|
||
* we don't need to convert to a string to perform the indexing operation.
|
||
*/
|
||
|
||
if (TclIsPureByteArray(objPtr)) {
|
||
unsigned char *bytes = Tcl_GetByteArrayFromObj(objPtr, &length);
|
||
if (index >= length) {
|
||
return 0xFFFD;
|
||
}
|
||
|
||
return (Tcl_UniChar) bytes[index];
|
||
}
|
||
|
||
/*
|
||
* OK, need to work with the object as a string.
|
||
*/
|
||
|
||
SetStringFromAny(NULL, objPtr);
|
||
stringPtr = GET_STRING(objPtr);
|
||
|
||
if (stringPtr->hasUnicode == 0) {
|
||
/*
|
||
* If numChars is unknown, compute it.
|
||
*/
|
||
|
||
if (stringPtr->numChars == -1) {
|
||
TclNumUtfChars(stringPtr->numChars, objPtr->bytes, objPtr->length);
|
||
}
|
||
if (stringPtr->numChars == objPtr->length) {
|
||
return (Tcl_UniChar) objPtr->bytes[index];
|
||
}
|
||
FillUnicodeRep(objPtr);
|
||
stringPtr = GET_STRING(objPtr);
|
||
}
|
||
|
||
if (index >= stringPtr->numChars) {
|
||
return 0xFFFD;
|
||
}
|
||
return stringPtr->unicode[index];
|
||
}
|
||
|
||
#if TCL_UTF_MAX == 4
|
||
int
|
||
TclGetUCS4(
|
||
Tcl_Obj *objPtr, /* The object to get the Unicode charater
|
||
* from. */
|
||
int index) /* Get the index'th Unicode character. */
|
||
{
|
||
String *stringPtr;
|
||
int ch, length;
|
||
|
||
if (index < 0) {
|
||
return -1;
|
||
}
|
||
|
||
/*
|
||
* Optimize the case where we're really dealing with a bytearray object
|
||
* we don't need to convert to a string to perform the indexing operation.
|
||
*/
|
||
|
||
if (TclIsPureByteArray(objPtr)) {
|
||
unsigned char *bytes = Tcl_GetByteArrayFromObj(objPtr, &length);
|
||
if (index >= length) {
|
||
return -1;
|
||
}
|
||
|
||
return (int) bytes[index];
|
||
}
|
||
|
||
/*
|
||
* OK, need to work with the object as a string.
|
||
*/
|
||
|
||
SetStringFromAny(NULL, objPtr);
|
||
stringPtr = GET_STRING(objPtr);
|
||
|
||
if (stringPtr->hasUnicode == 0) {
|
||
/*
|
||
* If numChars is unknown, compute it.
|
||
*/
|
||
|
||
if (stringPtr->numChars == -1) {
|
||
TclNumUtfChars(stringPtr->numChars, objPtr->bytes, objPtr->length);
|
||
}
|
||
if (stringPtr->numChars == objPtr->length) {
|
||
return (Tcl_UniChar) objPtr->bytes[index];
|
||
}
|
||
FillUnicodeRep(objPtr);
|
||
stringPtr = GET_STRING(objPtr);
|
||
}
|
||
|
||
if (index >= stringPtr->numChars) {
|
||
return -1;
|
||
}
|
||
ch = stringPtr->unicode[index];
|
||
#if TCL_UTF_MAX <= 4
|
||
/* See: bug [11ae2be95dac9417] */
|
||
if ((ch & 0xF800) == 0xD800) {
|
||
if (ch & 0x400) {
|
||
if ((index > 0)
|
||
&& ((stringPtr->unicode[index-1] & 0xFC00) == 0xD800)) {
|
||
ch = -1; /* low surrogate preceded by high surrogate */
|
||
}
|
||
} else if ((++index < stringPtr->numChars)
|
||
&& ((stringPtr->unicode[index] & 0xFC00) == 0xDC00)) {
|
||
/* high surrogate followed by low surrogate */
|
||
ch = (((ch & 0x3FF) << 10) |
|
||
(stringPtr->unicode[index] & 0x3FF)) + 0x10000;
|
||
}
|
||
}
|
||
#endif
|
||
return ch;
|
||
}
|
||
#endif
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* Tcl_GetUnicode --
|
||
*
|
||
* Get the Unicode form of the String object. If the object is not
|
||
* already a String object, it will be converted to one. If the String
|
||
* object does not have a Unicode rep, then one is created from the UTF
|
||
* string format.
|
||
*
|
||
* Results:
|
||
* Returns a pointer to the object's internal Unicode string.
|
||
*
|
||
* Side effects:
|
||
* Converts the object to have the String internal rep.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
Tcl_UniChar *
|
||
Tcl_GetUnicode(
|
||
Tcl_Obj *objPtr) /* The object to find the unicode string
|
||
* for. */
|
||
{
|
||
return Tcl_GetUnicodeFromObj(objPtr, NULL);
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* Tcl_GetUnicodeFromObj --
|
||
*
|
||
* Get the Unicode form of the String object with length. If the object
|
||
* is not already a String object, it will be converted to one. If the
|
||
* String object does not have a Unicode rep, then one is create from the
|
||
* UTF string format.
|
||
*
|
||
* Results:
|
||
* Returns a pointer to the object's internal Unicode string.
|
||
*
|
||
* Side effects:
|
||
* Converts the object to have the String internal rep.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
Tcl_UniChar *
|
||
Tcl_GetUnicodeFromObj(
|
||
Tcl_Obj *objPtr, /* The object to find the unicode string
|
||
* for. */
|
||
int *lengthPtr) /* If non-NULL, the location where the string
|
||
* rep's unichar length should be stored. If
|
||
* NULL, no length is stored. */
|
||
{
|
||
String *stringPtr;
|
||
|
||
SetStringFromAny(NULL, objPtr);
|
||
stringPtr = GET_STRING(objPtr);
|
||
|
||
if (stringPtr->hasUnicode == 0) {
|
||
FillUnicodeRep(objPtr);
|
||
stringPtr = GET_STRING(objPtr);
|
||
}
|
||
|
||
if (lengthPtr != NULL) {
|
||
*lengthPtr = stringPtr->numChars;
|
||
}
|
||
return stringPtr->unicode;
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* Tcl_GetRange --
|
||
*
|
||
* Create a Tcl Object that contains the chars between first and last of
|
||
* the object indicated by "objPtr". If the object is not already a
|
||
* String object, convert it to one. The first and last indices are
|
||
* assumed to be in the appropriate range.
|
||
*
|
||
* Results:
|
||
* Returns a new Tcl Object of the String type.
|
||
*
|
||
* Side effects:
|
||
* Changes the internal rep of "objPtr" to the String type.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
Tcl_Obj *
|
||
Tcl_GetRange(
|
||
Tcl_Obj *objPtr, /* The Tcl object to find the range of. */
|
||
int first, /* First index of the range. */
|
||
int last) /* Last index of the range. */
|
||
{
|
||
Tcl_Obj *newObjPtr; /* The Tcl object to find the range of. */
|
||
String *stringPtr;
|
||
int length;
|
||
|
||
if (first < 0) {
|
||
first = 0;
|
||
}
|
||
|
||
/*
|
||
* Optimize the case where we're really dealing with a bytearray object
|
||
* we don't need to convert to a string to perform the substring operation.
|
||
*/
|
||
|
||
if (TclIsPureByteArray(objPtr)) {
|
||
unsigned char *bytes = Tcl_GetByteArrayFromObj(objPtr, &length);
|
||
|
||
if (last >= length) {
|
||
last = length - 1;
|
||
}
|
||
if (last < first) {
|
||
return Tcl_NewObj();
|
||
}
|
||
return Tcl_NewByteArrayObj(bytes + first, last - first + 1);
|
||
}
|
||
|
||
/*
|
||
* OK, need to work with the object as a string.
|
||
*/
|
||
|
||
SetStringFromAny(NULL, objPtr);
|
||
stringPtr = GET_STRING(objPtr);
|
||
|
||
if (stringPtr->hasUnicode == 0) {
|
||
/*
|
||
* If numChars is unknown, compute it.
|
||
*/
|
||
|
||
if (stringPtr->numChars == -1) {
|
||
TclNumUtfChars(stringPtr->numChars, objPtr->bytes, objPtr->length);
|
||
}
|
||
if (stringPtr->numChars == objPtr->length) {
|
||
if (last >= stringPtr->numChars) {
|
||
last = stringPtr->numChars - 1;
|
||
}
|
||
if (last < first) {
|
||
return Tcl_NewObj();
|
||
}
|
||
newObjPtr = Tcl_NewStringObj(objPtr->bytes + first, last-first+1);
|
||
|
||
/*
|
||
* Since we know the char length of the result, store it.
|
||
*/
|
||
|
||
SetStringFromAny(NULL, newObjPtr);
|
||
stringPtr = GET_STRING(newObjPtr);
|
||
stringPtr->numChars = newObjPtr->length;
|
||
return newObjPtr;
|
||
}
|
||
FillUnicodeRep(objPtr);
|
||
stringPtr = GET_STRING(objPtr);
|
||
}
|
||
if (last > stringPtr->numChars) {
|
||
last = stringPtr->numChars;
|
||
}
|
||
if (last < first) {
|
||
return Tcl_NewObj();
|
||
}
|
||
#if TCL_UTF_MAX == 4
|
||
/* See: bug [11ae2be95dac9417] */
|
||
if ((first > 0) && ((stringPtr->unicode[first] & 0xFC00) == 0xDC00)
|
||
&& ((stringPtr->unicode[first-1] & 0xFC00) == 0xD800)) {
|
||
++first;
|
||
}
|
||
if ((last + 1 < stringPtr->numChars)
|
||
&& ((stringPtr->unicode[last+1] & 0xFC00) == 0xDC00)
|
||
&& ((stringPtr->unicode[last] & 0xFC00) == 0xD800)) {
|
||
++last;
|
||
}
|
||
#endif
|
||
return Tcl_NewUnicodeObj(stringPtr->unicode + first, last - first + 1);
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* Tcl_SetStringObj --
|
||
*
|
||
* Modify an object to hold a string that is a copy of the bytes
|
||
* indicated by the byte pointer and length arguments.
|
||
*
|
||
* Results:
|
||
* None.
|
||
*
|
||
* Side effects:
|
||
* The object's string representation will be set to a copy of the
|
||
* "length" bytes starting at "bytes". If "length" is negative, use bytes
|
||
* up to the first NUL byte; i.e., assume "bytes" points to a C-style
|
||
* NUL-terminated string. The object's old string and internal
|
||
* representations are freed and the object's type is set NULL.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
void
|
||
Tcl_SetStringObj(
|
||
Tcl_Obj *objPtr, /* Object whose internal rep to init. */
|
||
const char *bytes, /* Points to the first of the length bytes
|
||
* used to initialize the object. */
|
||
int length) /* The number of bytes to copy from "bytes"
|
||
* when initializing the object. If negative,
|
||
* use bytes up to the first NUL byte.*/
|
||
{
|
||
if (Tcl_IsShared(objPtr)) {
|
||
Tcl_Panic("%s called with shared object", "Tcl_SetStringObj");
|
||
}
|
||
|
||
/*
|
||
* Set the type to NULL and free any internal rep for the old type.
|
||
*/
|
||
|
||
TclFreeIntRep(objPtr);
|
||
|
||
/*
|
||
* Free any old string rep, then set the string rep to a copy of the
|
||
* length bytes starting at "bytes".
|
||
*/
|
||
|
||
TclInvalidateStringRep(objPtr);
|
||
if (length < 0) {
|
||
length = (bytes? strlen(bytes) : 0);
|
||
}
|
||
TclInitStringRep(objPtr, bytes, length);
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* Tcl_SetObjLength --
|
||
*
|
||
* This function changes the length of the string representation of an
|
||
* object.
|
||
*
|
||
* Results:
|
||
* None.
|
||
*
|
||
* Side effects:
|
||
* If the size of objPtr's string representation is greater than length,
|
||
* then it is reduced to length and a new terminating null byte is stored
|
||
* in the strength. If the length of the string representation is greater
|
||
* than length, the storage space is reallocated to the given length; a
|
||
* null byte is stored at the end, but other bytes past the end of the
|
||
* original string representation are undefined. The object's internal
|
||
* representation is changed to "expendable string".
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
void
|
||
Tcl_SetObjLength(
|
||
Tcl_Obj *objPtr, /* Pointer to object. This object must not
|
||
* currently be shared. */
|
||
int length) /* Number of bytes desired for string
|
||
* representation of object, not including
|
||
* terminating null byte. */
|
||
{
|
||
String *stringPtr;
|
||
|
||
if (length < 0) {
|
||
/*
|
||
* Setting to a negative length is nonsense. This is probably the
|
||
* result of overflowing the signed integer range.
|
||
*/
|
||
|
||
Tcl_Panic("Tcl_SetObjLength: negative length requested: "
|
||
"%d (integer overflow?)", length);
|
||
}
|
||
if (Tcl_IsShared(objPtr)) {
|
||
Tcl_Panic("%s called with shared object", "Tcl_SetObjLength");
|
||
}
|
||
|
||
if (objPtr->bytes && objPtr->length == length) {
|
||
return;
|
||
}
|
||
|
||
SetStringFromAny(NULL, objPtr);
|
||
stringPtr = GET_STRING(objPtr);
|
||
|
||
if (objPtr->bytes != NULL) {
|
||
/*
|
||
* Change length of an existing string rep.
|
||
*/
|
||
if (length > stringPtr->allocated) {
|
||
/*
|
||
* Need to enlarge the buffer.
|
||
*/
|
||
if (objPtr->bytes == tclEmptyStringRep) {
|
||
objPtr->bytes = (char *)ckalloc(length + 1);
|
||
} else {
|
||
objPtr->bytes = (char *)ckrealloc(objPtr->bytes, length + 1);
|
||
}
|
||
stringPtr->allocated = length;
|
||
}
|
||
|
||
objPtr->length = length;
|
||
objPtr->bytes[length] = 0;
|
||
|
||
/*
|
||
* Invalidate the unicode data.
|
||
*/
|
||
|
||
stringPtr->numChars = -1;
|
||
stringPtr->hasUnicode = 0;
|
||
} else {
|
||
/*
|
||
* Changing length of pure unicode string.
|
||
*/
|
||
|
||
stringCheckLimits(length);
|
||
if (length > stringPtr->maxChars) {
|
||
stringPtr = stringRealloc(stringPtr, length);
|
||
SET_STRING(objPtr, stringPtr);
|
||
stringPtr->maxChars = length;
|
||
}
|
||
|
||
/*
|
||
* Mark the new end of the unicode string
|
||
*/
|
||
|
||
stringPtr->numChars = length;
|
||
stringPtr->unicode[length] = 0;
|
||
stringPtr->hasUnicode = 1;
|
||
|
||
/*
|
||
* Can only get here when objPtr->bytes == NULL. No need to invalidate
|
||
* the string rep.
|
||
*/
|
||
}
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* Tcl_AttemptSetObjLength --
|
||
*
|
||
* This function changes the length of the string representation of an
|
||
* object. It uses the attempt* (non-panic'ing) memory allocators.
|
||
*
|
||
* Results:
|
||
* 1 if the requested memory was allocated, 0 otherwise.
|
||
*
|
||
* Side effects:
|
||
* If the size of objPtr's string representation is greater than length,
|
||
* then it is reduced to length and a new terminating null byte is stored
|
||
* in the strength. If the length of the string representation is greater
|
||
* than length, the storage space is reallocated to the given length; a
|
||
* null byte is stored at the end, but other bytes past the end of the
|
||
* original string representation are undefined. The object's internal
|
||
* representation is changed to "expendable string".
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
int
|
||
Tcl_AttemptSetObjLength(
|
||
Tcl_Obj *objPtr, /* Pointer to object. This object must not
|
||
* currently be shared. */
|
||
int length) /* Number of bytes desired for string
|
||
* representation of object, not including
|
||
* terminating null byte. */
|
||
{
|
||
String *stringPtr;
|
||
|
||
if (length < 0) {
|
||
/*
|
||
* Setting to a negative length is nonsense. This is probably the
|
||
* result of overflowing the signed integer range.
|
||
*/
|
||
|
||
return 0;
|
||
}
|
||
if (Tcl_IsShared(objPtr)) {
|
||
Tcl_Panic("%s called with shared object", "Tcl_AttemptSetObjLength");
|
||
}
|
||
if (objPtr->bytes && objPtr->length == length) {
|
||
return 1;
|
||
}
|
||
|
||
SetStringFromAny(NULL, objPtr);
|
||
stringPtr = GET_STRING(objPtr);
|
||
|
||
if (objPtr->bytes != NULL) {
|
||
/*
|
||
* Change length of an existing string rep.
|
||
*/
|
||
if (length > stringPtr->allocated) {
|
||
/*
|
||
* Need to enlarge the buffer.
|
||
*/
|
||
|
||
char *newBytes;
|
||
|
||
if (objPtr->bytes == tclEmptyStringRep) {
|
||
newBytes = (char *)attemptckalloc(length + 1);
|
||
} else {
|
||
newBytes = (char *)attemptckrealloc(objPtr->bytes, length + 1);
|
||
}
|
||
if (newBytes == NULL) {
|
||
return 0;
|
||
}
|
||
objPtr->bytes = newBytes;
|
||
stringPtr->allocated = length;
|
||
}
|
||
|
||
objPtr->length = length;
|
||
objPtr->bytes[length] = 0;
|
||
|
||
/*
|
||
* Invalidate the unicode data.
|
||
*/
|
||
|
||
stringPtr->numChars = -1;
|
||
stringPtr->hasUnicode = 0;
|
||
} else {
|
||
/*
|
||
* Changing length of pure unicode string.
|
||
*/
|
||
|
||
if (length > STRING_MAXCHARS) {
|
||
return 0;
|
||
}
|
||
if (length > stringPtr->maxChars) {
|
||
stringPtr = stringAttemptRealloc(stringPtr, length);
|
||
if (stringPtr == NULL) {
|
||
return 0;
|
||
}
|
||
SET_STRING(objPtr, stringPtr);
|
||
stringPtr->maxChars = length;
|
||
}
|
||
|
||
/*
|
||
* Mark the new end of the unicode string.
|
||
*/
|
||
|
||
stringPtr->unicode[length] = 0;
|
||
stringPtr->numChars = length;
|
||
stringPtr->hasUnicode = 1;
|
||
|
||
/*
|
||
* Can only get here when objPtr->bytes == NULL. No need to invalidate
|
||
* the string rep.
|
||
*/
|
||
}
|
||
return 1;
|
||
}
|
||
|
||
/*
|
||
*---------------------------------------------------------------------------
|
||
*
|
||
* Tcl_SetUnicodeObj --
|
||
*
|
||
* Modify an object to hold the Unicode string indicated by "unicode".
|
||
*
|
||
* Results:
|
||
* None.
|
||
*
|
||
* Side effects:
|
||
* Memory allocated for new "String" internal rep.
|
||
*
|
||
*---------------------------------------------------------------------------
|
||
*/
|
||
|
||
void
|
||
Tcl_SetUnicodeObj(
|
||
Tcl_Obj *objPtr, /* The object to set the string of. */
|
||
const Tcl_UniChar *unicode, /* The unicode string used to initialize the
|
||
* object. */
|
||
int numChars) /* Number of characters in the unicode
|
||
* string. */
|
||
{
|
||
if (Tcl_IsShared(objPtr)) {
|
||
Tcl_Panic("%s called with shared object", "Tcl_SetUnicodeObj");
|
||
}
|
||
TclFreeIntRep(objPtr);
|
||
SetUnicodeObj(objPtr, unicode, numChars);
|
||
}
|
||
|
||
static int
|
||
UnicodeLength(
|
||
const Tcl_UniChar *unicode)
|
||
{
|
||
int numChars = 0;
|
||
|
||
if (unicode) {
|
||
while (numChars >= 0 && unicode[numChars] != 0) {
|
||
numChars++;
|
||
}
|
||
}
|
||
stringCheckLimits(numChars);
|
||
return numChars;
|
||
}
|
||
|
||
static void
|
||
SetUnicodeObj(
|
||
Tcl_Obj *objPtr, /* The object to set the string of. */
|
||
const Tcl_UniChar *unicode, /* The unicode string used to initialize the
|
||
* object. */
|
||
int numChars) /* Number of characters in the unicode
|
||
* string. */
|
||
{
|
||
String *stringPtr;
|
||
|
||
if (numChars < 0) {
|
||
numChars = UnicodeLength(unicode);
|
||
}
|
||
|
||
/*
|
||
* Allocate enough space for the String structure + Unicode string.
|
||
*/
|
||
|
||
stringCheckLimits(numChars);
|
||
stringPtr = stringAlloc(numChars);
|
||
SET_STRING(objPtr, stringPtr);
|
||
objPtr->typePtr = &tclStringType;
|
||
|
||
stringPtr->maxChars = numChars;
|
||
memcpy(stringPtr->unicode, unicode, numChars * sizeof(Tcl_UniChar));
|
||
stringPtr->unicode[numChars] = 0;
|
||
stringPtr->numChars = numChars;
|
||
stringPtr->hasUnicode = 1;
|
||
|
||
TclInvalidateStringRep(objPtr);
|
||
stringPtr->allocated = 0;
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* Tcl_AppendLimitedToObj --
|
||
*
|
||
* This function appends a limited number of bytes from a sequence of
|
||
* bytes to an object, marking any limitation with an ellipsis.
|
||
*
|
||
* Results:
|
||
* None.
|
||
*
|
||
* Side effects:
|
||
* The bytes at *bytes are appended to the string representation of
|
||
* objPtr.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
void
|
||
Tcl_AppendLimitedToObj(
|
||
Tcl_Obj *objPtr, /* Points to the object to append to. */
|
||
const char *bytes, /* Points to the bytes to append to the
|
||
* object. */
|
||
int length, /* The number of bytes available to be
|
||
* appended from "bytes". If < 0, then all
|
||
* bytes up to a NUL byte are available. */
|
||
int limit, /* The maximum number of bytes to append to
|
||
* the object. */
|
||
const char *ellipsis) /* Ellipsis marker string, appended to the
|
||
* object to indicate not all available bytes
|
||
* at "bytes" were appended. */
|
||
{
|
||
String *stringPtr;
|
||
int toCopy = 0;
|
||
int eLen = 0;
|
||
|
||
if (length < 0) {
|
||
length = (bytes ? strlen(bytes) : 0);
|
||
}
|
||
if (length == 0) {
|
||
return;
|
||
}
|
||
if (limit <= 0) {
|
||
return;
|
||
}
|
||
|
||
if (length <= limit) {
|
||
toCopy = length;
|
||
} else {
|
||
if (ellipsis == NULL) {
|
||
ellipsis = "...";
|
||
}
|
||
eLen = strlen(ellipsis);
|
||
while (eLen > limit) {
|
||
eLen = TclUtfPrev(ellipsis+eLen, ellipsis) - ellipsis;
|
||
}
|
||
|
||
toCopy = TclUtfPrev(bytes+limit+1-eLen, bytes) - bytes;
|
||
}
|
||
|
||
/*
|
||
* If objPtr has a valid Unicode rep, then append the Unicode conversion
|
||
* of "bytes" to the objPtr's Unicode rep, otherwise append "bytes" to
|
||
* objPtr's string rep.
|
||
*/
|
||
|
||
if (Tcl_IsShared(objPtr)) {
|
||
Tcl_Panic("%s called with shared object", "Tcl_AppendLimitedToObj");
|
||
}
|
||
|
||
SetStringFromAny(NULL, objPtr);
|
||
stringPtr = GET_STRING(objPtr);
|
||
|
||
if (stringPtr->hasUnicode && stringPtr->numChars > 0) {
|
||
AppendUtfToUnicodeRep(objPtr, bytes, toCopy);
|
||
} else {
|
||
AppendUtfToUtfRep(objPtr, bytes, toCopy);
|
||
}
|
||
|
||
if (length <= limit) {
|
||
return;
|
||
}
|
||
|
||
stringPtr = GET_STRING(objPtr);
|
||
if (stringPtr->hasUnicode && stringPtr->numChars > 0) {
|
||
AppendUtfToUnicodeRep(objPtr, ellipsis, eLen);
|
||
} else {
|
||
AppendUtfToUtfRep(objPtr, ellipsis, eLen);
|
||
}
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* Tcl_AppendToObj --
|
||
*
|
||
* This function appends a sequence of bytes to an object.
|
||
*
|
||
* Results:
|
||
* None.
|
||
*
|
||
* Side effects:
|
||
* The bytes at *bytes are appended to the string representation of
|
||
* objPtr.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
void
|
||
Tcl_AppendToObj(
|
||
Tcl_Obj *objPtr, /* Points to the object to append to. */
|
||
const char *bytes, /* Points to the bytes to append to the
|
||
* object. */
|
||
int length) /* The number of bytes to append from "bytes".
|
||
* If < 0, then append all bytes up to NUL
|
||
* byte. */
|
||
{
|
||
Tcl_AppendLimitedToObj(objPtr, bytes, length, INT_MAX, NULL);
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* Tcl_AppendUnicodeToObj --
|
||
*
|
||
* This function appends a Unicode string to an object in the most
|
||
* efficient manner possible. Length must be >= 0.
|
||
*
|
||
* Results:
|
||
* None.
|
||
*
|
||
* Side effects:
|
||
* Invalidates the string rep and creates a new Unicode string.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
void
|
||
Tcl_AppendUnicodeToObj(
|
||
Tcl_Obj *objPtr, /* Points to the object to append to. */
|
||
const Tcl_UniChar *unicode, /* The unicode string to append to the
|
||
* object. */
|
||
int length) /* Number of chars in "unicode". */
|
||
{
|
||
String *stringPtr;
|
||
|
||
if (Tcl_IsShared(objPtr)) {
|
||
Tcl_Panic("%s called with shared object", "Tcl_AppendUnicodeToObj");
|
||
}
|
||
|
||
if (length == 0) {
|
||
return;
|
||
}
|
||
|
||
SetStringFromAny(NULL, objPtr);
|
||
stringPtr = GET_STRING(objPtr);
|
||
|
||
/*
|
||
* If objPtr has a valid Unicode rep, then append the "unicode" to the
|
||
* objPtr's Unicode rep, otherwise the UTF conversion of "unicode" to
|
||
* objPtr's string rep.
|
||
*/
|
||
|
||
if (stringPtr->hasUnicode
|
||
#if COMPAT
|
||
&& stringPtr->numChars > 0
|
||
#endif
|
||
) {
|
||
AppendUnicodeToUnicodeRep(objPtr, unicode, length);
|
||
} else {
|
||
AppendUnicodeToUtfRep(objPtr, unicode, length);
|
||
}
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* Tcl_AppendObjToObj --
|
||
*
|
||
* This function appends the string rep of one object to another.
|
||
* "objPtr" cannot be a shared object.
|
||
*
|
||
* Results:
|
||
* None.
|
||
*
|
||
* Side effects:
|
||
* The string rep of appendObjPtr is appended to the string
|
||
* representation of objPtr.
|
||
* IMPORTANT: This routine does not and MUST NOT shimmer appendObjPtr.
|
||
* Callers are counting on that.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
void
|
||
Tcl_AppendObjToObj(
|
||
Tcl_Obj *objPtr, /* Points to the object to append to. */
|
||
Tcl_Obj *appendObjPtr) /* Object to append. */
|
||
{
|
||
String *stringPtr;
|
||
int length, numChars, appendNumChars = -1;
|
||
const char *bytes;
|
||
|
||
/*
|
||
* Special case: second object is standard-empty is fast case. We know
|
||
* that appending nothing to anything leaves that starting anything...
|
||
*/
|
||
|
||
if (appendObjPtr->bytes == tclEmptyStringRep) {
|
||
return;
|
||
}
|
||
|
||
/*
|
||
* Handle append of one bytearray object to another as a special case.
|
||
* Note that we only do this when the objects don't have string reps; if
|
||
* it did, then appending the byte arrays together could well lose
|
||
* information; this is a special-case optimization only.
|
||
*/
|
||
|
||
if ((TclIsPureByteArray(objPtr) || objPtr->bytes == tclEmptyStringRep)
|
||
&& TclIsPureByteArray(appendObjPtr)) {
|
||
/*
|
||
* You might expect the code here to be
|
||
*
|
||
* bytes = Tcl_GetByteArrayFromObj(appendObjPtr, &length);
|
||
* TclAppendBytesToByteArray(objPtr, bytes, length);
|
||
*
|
||
* and essentially all of the time that would be fine. However, it
|
||
* would run into trouble in the case where objPtr and appendObjPtr
|
||
* point to the same thing. That may never be a good idea. It seems to
|
||
* violate Copy On Write, and we don't have any tests for the
|
||
* situation, since making any Tcl commands that call
|
||
* Tcl_AppendObjToObj() do that appears impossible (They honor Copy On
|
||
* Write!). For the sake of extensions that go off into that realm,
|
||
* though, here's a more complex approach that can handle all the
|
||
* cases.
|
||
*
|
||
* First, get the lengths.
|
||
*/
|
||
|
||
int lengthSrc;
|
||
|
||
(void) Tcl_GetByteArrayFromObj(objPtr, &length);
|
||
(void) Tcl_GetByteArrayFromObj(appendObjPtr, &lengthSrc);
|
||
|
||
/*
|
||
* Grow buffer enough for the append.
|
||
*/
|
||
|
||
TclAppendBytesToByteArray(objPtr, NULL, lengthSrc);
|
||
|
||
/*
|
||
* Reset objPtr back to the original value.
|
||
*/
|
||
|
||
Tcl_SetByteArrayLength(objPtr, length);
|
||
|
||
/*
|
||
* Now do the append knowing that buffer growth cannot cause any
|
||
* trouble.
|
||
*/
|
||
|
||
TclAppendBytesToByteArray(objPtr,
|
||
Tcl_GetByteArrayFromObj(appendObjPtr, NULL), lengthSrc);
|
||
return;
|
||
}
|
||
|
||
/*
|
||
* Must append as strings.
|
||
*/
|
||
|
||
SetStringFromAny(NULL, objPtr);
|
||
stringPtr = GET_STRING(objPtr);
|
||
|
||
/*
|
||
* If objPtr has a valid Unicode rep, then get a Unicode string from
|
||
* appendObjPtr and append it.
|
||
*/
|
||
|
||
if (stringPtr->hasUnicode
|
||
#if COMPAT
|
||
&& stringPtr->numChars > 0
|
||
#endif
|
||
) {
|
||
/*
|
||
* If appendObjPtr is not of the "String" type, don't convert it.
|
||
*/
|
||
|
||
if (appendObjPtr->typePtr == &tclStringType) {
|
||
Tcl_UniChar *unicode =
|
||
Tcl_GetUnicodeFromObj(appendObjPtr, &numChars);
|
||
|
||
AppendUnicodeToUnicodeRep(objPtr, unicode, numChars);
|
||
} else {
|
||
bytes = TclGetStringFromObj(appendObjPtr, &length);
|
||
AppendUtfToUnicodeRep(objPtr, bytes, length);
|
||
}
|
||
return;
|
||
}
|
||
|
||
/*
|
||
* Append to objPtr's UTF string rep. If we know the number of characters
|
||
* in both objects before appending, then set the combined number of
|
||
* characters in the final (appended-to) object.
|
||
*/
|
||
|
||
bytes = TclGetStringFromObj(appendObjPtr, &length);
|
||
|
||
numChars = stringPtr->numChars;
|
||
if ((numChars >= 0) && (appendObjPtr->typePtr == &tclStringType)) {
|
||
String *appendStringPtr = GET_STRING(appendObjPtr);
|
||
|
||
appendNumChars = appendStringPtr->numChars;
|
||
}
|
||
|
||
AppendUtfToUtfRep(objPtr, bytes, length);
|
||
|
||
if (numChars >= 0 && appendNumChars >= 0
|
||
#if COMPAT
|
||
&& appendNumChars == length
|
||
#endif
|
||
) {
|
||
stringPtr->numChars = numChars + appendNumChars;
|
||
}
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* AppendUnicodeToUnicodeRep --
|
||
*
|
||
* This function appends the contents of "unicode" to the Unicode rep of
|
||
* "objPtr". objPtr must already have a valid Unicode rep.
|
||
*
|
||
* Results:
|
||
* None.
|
||
*
|
||
* Side effects:
|
||
* objPtr's internal rep is reallocated.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
static void
|
||
AppendUnicodeToUnicodeRep(
|
||
Tcl_Obj *objPtr, /* Points to the object to append to. */
|
||
const Tcl_UniChar *unicode, /* String to append. */
|
||
int appendNumChars) /* Number of chars of "unicode" to append. */
|
||
{
|
||
String *stringPtr;
|
||
int numChars;
|
||
|
||
if (appendNumChars < 0) {
|
||
appendNumChars = UnicodeLength(unicode);
|
||
}
|
||
if (appendNumChars == 0) {
|
||
return;
|
||
}
|
||
|
||
SetStringFromAny(NULL, objPtr);
|
||
stringPtr = GET_STRING(objPtr);
|
||
|
||
/*
|
||
* If not enough space has been allocated for the unicode rep, reallocate
|
||
* the internal rep object with additional space. First try to double the
|
||
* required allocation; if that fails, try a more modest increase. See the
|
||
* "TCL STRING GROWTH ALGORITHM" comment at the top of this file for an
|
||
* explanation of this growth algorithm.
|
||
*/
|
||
|
||
numChars = stringPtr->numChars + appendNumChars;
|
||
stringCheckLimits(numChars);
|
||
|
||
if (numChars > stringPtr->maxChars) {
|
||
int offset = -1;
|
||
|
||
/*
|
||
* Protect against case where unicode points into the existing
|
||
* stringPtr->unicode array. Force it to follow any relocations due to
|
||
* the reallocs below.
|
||
*/
|
||
|
||
if (unicode && unicode >= stringPtr->unicode
|
||
&& unicode <= stringPtr->unicode + stringPtr->maxChars) {
|
||
offset = unicode - stringPtr->unicode;
|
||
}
|
||
|
||
GrowUnicodeBuffer(objPtr, numChars);
|
||
stringPtr = GET_STRING(objPtr);
|
||
|
||
/*
|
||
* Relocate unicode if needed; see above.
|
||
*/
|
||
|
||
if (offset >= 0) {
|
||
unicode = stringPtr->unicode + offset;
|
||
}
|
||
}
|
||
|
||
/*
|
||
* Copy the new string onto the end of the old string, then add the
|
||
* trailing null.
|
||
*/
|
||
|
||
if (unicode) {
|
||
memmove(stringPtr->unicode + stringPtr->numChars, unicode,
|
||
appendNumChars * sizeof(Tcl_UniChar));
|
||
}
|
||
stringPtr->unicode[numChars] = 0;
|
||
stringPtr->numChars = numChars;
|
||
stringPtr->allocated = 0;
|
||
|
||
TclInvalidateStringRep(objPtr);
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* AppendUnicodeToUtfRep --
|
||
*
|
||
* This function converts the contents of "unicode" to UTF and appends
|
||
* the UTF to the string rep of "objPtr".
|
||
*
|
||
* Results:
|
||
* None.
|
||
*
|
||
* Side effects:
|
||
* objPtr's internal rep is reallocated.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
static void
|
||
AppendUnicodeToUtfRep(
|
||
Tcl_Obj *objPtr, /* Points to the object to append to. */
|
||
const Tcl_UniChar *unicode, /* String to convert to UTF. */
|
||
int numChars) /* Number of chars of "unicode" to convert. */
|
||
{
|
||
String *stringPtr = GET_STRING(objPtr);
|
||
|
||
numChars = ExtendStringRepWithUnicode(objPtr, unicode, numChars);
|
||
|
||
if (stringPtr->numChars != -1) {
|
||
stringPtr->numChars += numChars;
|
||
}
|
||
|
||
#if COMPAT
|
||
/*
|
||
* Invalidate the unicode rep.
|
||
*/
|
||
|
||
stringPtr->hasUnicode = 0;
|
||
#endif
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* AppendUtfToUnicodeRep --
|
||
*
|
||
* This function converts the contents of "bytes" to Unicode and appends
|
||
* the Unicode to the Unicode rep of "objPtr". objPtr must already have a
|
||
* valid Unicode rep. numBytes must be non-negative.
|
||
*
|
||
* Results:
|
||
* None.
|
||
*
|
||
* Side effects:
|
||
* objPtr's internal rep is reallocated.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
static void
|
||
AppendUtfToUnicodeRep(
|
||
Tcl_Obj *objPtr, /* Points to the object to append to. */
|
||
const char *bytes, /* String to convert to Unicode. */
|
||
int numBytes) /* Number of bytes of "bytes" to convert. */
|
||
{
|
||
String *stringPtr;
|
||
|
||
if (numBytes == 0) {
|
||
return;
|
||
}
|
||
|
||
ExtendUnicodeRepWithString(objPtr, bytes, numBytes, -1);
|
||
TclInvalidateStringRep(objPtr);
|
||
stringPtr = GET_STRING(objPtr);
|
||
stringPtr->allocated = 0;
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* AppendUtfToUtfRep --
|
||
*
|
||
* This function appends "numBytes" bytes of "bytes" to the UTF string
|
||
* rep of "objPtr". objPtr must already have a valid String rep.
|
||
* numBytes must be non-negative.
|
||
*
|
||
* Results:
|
||
* None.
|
||
*
|
||
* Side effects:
|
||
* objPtr's internal rep is reallocated.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
static void
|
||
AppendUtfToUtfRep(
|
||
Tcl_Obj *objPtr, /* Points to the object to append to. */
|
||
const char *bytes, /* String to append. */
|
||
int numBytes) /* Number of bytes of "bytes" to append. */
|
||
{
|
||
String *stringPtr;
|
||
int newLength, oldLength;
|
||
|
||
if (numBytes == 0) {
|
||
return;
|
||
}
|
||
|
||
/*
|
||
* Copy the new string onto the end of the old string, then add the
|
||
* trailing null.
|
||
*/
|
||
|
||
if (objPtr->bytes == NULL) {
|
||
objPtr->length = 0;
|
||
}
|
||
oldLength = objPtr->length;
|
||
newLength = numBytes + oldLength;
|
||
if (newLength < 0) {
|
||
Tcl_Panic("max size for a Tcl value (%d bytes) exceeded", INT_MAX);
|
||
}
|
||
|
||
stringPtr = GET_STRING(objPtr);
|
||
if (newLength > stringPtr->allocated) {
|
||
int offset = -1;
|
||
|
||
/*
|
||
* Protect against case where unicode points into the existing
|
||
* stringPtr->unicode array. Force it to follow any relocations due to
|
||
* the reallocs below.
|
||
*/
|
||
|
||
if (bytes && bytes >= objPtr->bytes
|
||
&& bytes <= objPtr->bytes + objPtr->length) {
|
||
offset = bytes - objPtr->bytes;
|
||
}
|
||
|
||
/*
|
||
* TODO: consider passing flag=1: no overalloc on first append. This
|
||
* would make test stringObj-8.1 fail.
|
||
*/
|
||
|
||
GrowStringBuffer(objPtr, newLength, 0);
|
||
|
||
/*
|
||
* Relocate bytes if needed; see above.
|
||
*/
|
||
|
||
if (offset >= 0) {
|
||
bytes = objPtr->bytes + offset;
|
||
}
|
||
}
|
||
|
||
/*
|
||
* Invalidate the unicode data.
|
||
*/
|
||
|
||
stringPtr->numChars = -1;
|
||
stringPtr->hasUnicode = 0;
|
||
|
||
if (bytes) {
|
||
memmove(objPtr->bytes + oldLength, bytes, numBytes);
|
||
}
|
||
objPtr->bytes[newLength] = 0;
|
||
objPtr->length = newLength;
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* Tcl_AppendStringsToObjVA --
|
||
*
|
||
* This function appends one or more null-terminated strings to an
|
||
* object.
|
||
*
|
||
* Results:
|
||
* None.
|
||
*
|
||
* Side effects:
|
||
* The contents of all the string arguments are appended to the string
|
||
* representation of objPtr.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
void
|
||
Tcl_AppendStringsToObjVA(
|
||
Tcl_Obj *objPtr, /* Points to the object to append to. */
|
||
va_list argList) /* Variable argument list. */
|
||
{
|
||
if (Tcl_IsShared(objPtr)) {
|
||
Tcl_Panic("%s called with shared object", "Tcl_AppendStringsToObj");
|
||
}
|
||
|
||
while (1) {
|
||
const char *bytes = va_arg(argList, char *);
|
||
|
||
if (bytes == NULL) {
|
||
break;
|
||
}
|
||
Tcl_AppendToObj(objPtr, bytes, -1);
|
||
}
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* Tcl_AppendStringsToObj --
|
||
*
|
||
* This function appends one or more null-terminated strings to an
|
||
* object.
|
||
*
|
||
* Results:
|
||
* None.
|
||
*
|
||
* Side effects:
|
||
* The contents of all the string arguments are appended to the string
|
||
* representation of objPtr.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
void
|
||
Tcl_AppendStringsToObj(
|
||
Tcl_Obj *objPtr,
|
||
...)
|
||
{
|
||
va_list argList;
|
||
|
||
va_start(argList, objPtr);
|
||
Tcl_AppendStringsToObjVA(objPtr, argList);
|
||
va_end(argList);
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* Tcl_AppendFormatToObj --
|
||
*
|
||
* This function appends a list of Tcl_Obj's to a Tcl_Obj according to
|
||
* the formatting instructions embedded in the format string. The
|
||
* formatting instructions are inspired by sprintf(). Returns TCL_OK when
|
||
* successful. If there's an error in the arguments, TCL_ERROR is
|
||
* returned, and an error message is written to the interp, if non-NULL.
|
||
*
|
||
* Results:
|
||
* A standard Tcl result.
|
||
*
|
||
* Side effects:
|
||
* None.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
int
|
||
Tcl_AppendFormatToObj(
|
||
Tcl_Interp *interp,
|
||
Tcl_Obj *appendObj,
|
||
const char *format,
|
||
int objc,
|
||
Tcl_Obj *const objv[])
|
||
{
|
||
const char *span = format, *msg, *errCode;
|
||
int numBytes = 0, objIndex = 0, gotXpg = 0, gotSequential = 0;
|
||
int originalLength, limit;
|
||
Tcl_UniChar ch = 0;
|
||
static const char *mixedXPG =
|
||
"cannot mix \"%\" and \"%n$\" conversion specifiers";
|
||
static const char *const badIndex[2] = {
|
||
"not enough arguments for all format specifiers",
|
||
"\"%n$\" argument index out of range"
|
||
};
|
||
static const char *overflow = "max size for a Tcl value exceeded";
|
||
|
||
if (Tcl_IsShared(appendObj)) {
|
||
Tcl_Panic("%s called with shared object", "Tcl_AppendFormatToObj");
|
||
}
|
||
TclGetStringFromObj(appendObj, &originalLength);
|
||
limit = INT_MAX - originalLength;
|
||
|
||
/*
|
||
* Format string is NUL-terminated.
|
||
*/
|
||
|
||
while (*format != '\0') {
|
||
char *end;
|
||
int gotMinus = 0, gotHash = 0, gotZero = 0, gotSpace = 0, gotPlus = 0;
|
||
int width, gotPrecision, precision, sawFlag, useShort = 0, useBig = 0;
|
||
#ifndef TCL_WIDE_INT_IS_LONG
|
||
int useWide = 0;
|
||
#endif
|
||
int newXpg, numChars, allocSegment = 0, segmentLimit, segmentNumBytes;
|
||
Tcl_Obj *segment;
|
||
int step = TclUtfToUniChar(format, &ch);
|
||
|
||
format += step;
|
||
if (ch != '%') {
|
||
numBytes += step;
|
||
continue;
|
||
}
|
||
if (numBytes) {
|
||
if (numBytes > limit) {
|
||
msg = overflow;
|
||
errCode = "OVERFLOW";
|
||
goto errorMsg;
|
||
}
|
||
Tcl_AppendToObj(appendObj, span, numBytes);
|
||
limit -= numBytes;
|
||
numBytes = 0;
|
||
}
|
||
|
||
/*
|
||
* Saw a % : process the format specifier.
|
||
*
|
||
* Step 0. Handle special case of escaped format marker (i.e., %%).
|
||
*/
|
||
|
||
step = TclUtfToUniChar(format, &ch);
|
||
if (ch == '%') {
|
||
span = format;
|
||
numBytes = step;
|
||
format += step;
|
||
continue;
|
||
}
|
||
|
||
/*
|
||
* Step 1. XPG3 position specifier
|
||
*/
|
||
|
||
newXpg = 0;
|
||
if (isdigit(UCHAR(ch))) {
|
||
int position = strtoul(format, &end, 10);
|
||
|
||
if (*end == '$') {
|
||
newXpg = 1;
|
||
objIndex = position - 1;
|
||
format = end + 1;
|
||
step = TclUtfToUniChar(format, &ch);
|
||
}
|
||
}
|
||
if (newXpg) {
|
||
if (gotSequential) {
|
||
msg = mixedXPG;
|
||
errCode = "MIXEDSPECTYPES";
|
||
goto errorMsg;
|
||
}
|
||
gotXpg = 1;
|
||
} else {
|
||
if (gotXpg) {
|
||
msg = mixedXPG;
|
||
errCode = "MIXEDSPECTYPES";
|
||
goto errorMsg;
|
||
}
|
||
gotSequential = 1;
|
||
}
|
||
if ((objIndex < 0) || (objIndex >= objc)) {
|
||
msg = badIndex[gotXpg];
|
||
errCode = gotXpg ? "INDEXRANGE" : "FIELDVARMISMATCH";
|
||
goto errorMsg;
|
||
}
|
||
|
||
/*
|
||
* Step 2. Set of flags.
|
||
*/
|
||
|
||
sawFlag = 1;
|
||
do {
|
||
switch (ch) {
|
||
case '-':
|
||
gotMinus = 1;
|
||
break;
|
||
case '#':
|
||
gotHash = 1;
|
||
break;
|
||
case '0':
|
||
gotZero = 1;
|
||
break;
|
||
case ' ':
|
||
gotSpace = 1;
|
||
break;
|
||
case '+':
|
||
gotPlus = 1;
|
||
break;
|
||
default:
|
||
sawFlag = 0;
|
||
}
|
||
if (sawFlag) {
|
||
format += step;
|
||
step = TclUtfToUniChar(format, &ch);
|
||
}
|
||
} while (sawFlag);
|
||
|
||
/*
|
||
* Step 3. Minimum field width.
|
||
*/
|
||
|
||
width = 0;
|
||
if (isdigit(UCHAR(ch))) {
|
||
width = strtoul(format, &end, 10);
|
||
if (width < 0) {
|
||
msg = overflow;
|
||
errCode = "OVERFLOW";
|
||
goto errorMsg;
|
||
}
|
||
format = end;
|
||
step = TclUtfToUniChar(format, &ch);
|
||
} else if (ch == '*') {
|
||
if (objIndex >= objc - 1) {
|
||
msg = badIndex[gotXpg];
|
||
errCode = gotXpg ? "INDEXRANGE" : "FIELDVARMISMATCH";
|
||
goto errorMsg;
|
||
}
|
||
if (TclGetIntFromObj(interp, objv[objIndex], &width) != TCL_OK) {
|
||
goto error;
|
||
}
|
||
if (width < 0) {
|
||
width = -width;
|
||
gotMinus = 1;
|
||
}
|
||
objIndex++;
|
||
format += step;
|
||
step = TclUtfToUniChar(format, &ch);
|
||
}
|
||
if (width > limit) {
|
||
msg = overflow;
|
||
errCode = "OVERFLOW";
|
||
goto errorMsg;
|
||
}
|
||
|
||
/*
|
||
* Step 4. Precision.
|
||
*/
|
||
|
||
gotPrecision = precision = 0;
|
||
if (ch == '.') {
|
||
gotPrecision = 1;
|
||
format += step;
|
||
step = TclUtfToUniChar(format, &ch);
|
||
}
|
||
if (isdigit(UCHAR(ch))) {
|
||
precision = strtoul(format, &end, 10);
|
||
format = end;
|
||
step = TclUtfToUniChar(format, &ch);
|
||
} else if (ch == '*') {
|
||
if (objIndex >= objc - 1) {
|
||
msg = badIndex[gotXpg];
|
||
errCode = gotXpg ? "INDEXRANGE" : "FIELDVARMISMATCH";
|
||
goto errorMsg;
|
||
}
|
||
if (TclGetIntFromObj(interp, objv[objIndex], &precision)
|
||
!= TCL_OK) {
|
||
goto error;
|
||
}
|
||
|
||
/*
|
||
* TODO: Check this truncation logic.
|
||
*/
|
||
|
||
if (precision < 0) {
|
||
precision = 0;
|
||
}
|
||
objIndex++;
|
||
format += step;
|
||
step = TclUtfToUniChar(format, &ch);
|
||
}
|
||
|
||
/*
|
||
* Step 5. Length modifier.
|
||
*/
|
||
|
||
if (ch == 'h') {
|
||
useShort = 1;
|
||
format += step;
|
||
step = TclUtfToUniChar(format, &ch);
|
||
} else if (ch == 'l') {
|
||
format += step;
|
||
step = TclUtfToUniChar(format, &ch);
|
||
if (ch == 'l') {
|
||
useBig = 1;
|
||
format += step;
|
||
step = TclUtfToUniChar(format, &ch);
|
||
#ifndef TCL_WIDE_INT_IS_LONG
|
||
} else {
|
||
useWide = 1;
|
||
#endif
|
||
}
|
||
}
|
||
|
||
format += step;
|
||
span = format;
|
||
|
||
/*
|
||
* Step 6. The actual conversion character.
|
||
*/
|
||
|
||
segment = objv[objIndex];
|
||
numChars = -1;
|
||
if (ch == 'i') {
|
||
ch = 'd';
|
||
}
|
||
switch (ch) {
|
||
case '\0':
|
||
msg = "format string ended in middle of field specifier";
|
||
errCode = "INCOMPLETE";
|
||
goto errorMsg;
|
||
case 's':
|
||
if (gotPrecision) {
|
||
numChars = Tcl_GetCharLength(segment);
|
||
if (precision < numChars) {
|
||
segment = Tcl_GetRange(segment, 0, precision - 1);
|
||
numChars = precision;
|
||
Tcl_IncrRefCount(segment);
|
||
allocSegment = 1;
|
||
}
|
||
}
|
||
break;
|
||
case 'c': {
|
||
char buf[4] = "";
|
||
int code, length;
|
||
|
||
if (TclGetIntFromObj(interp, segment, &code) != TCL_OK) {
|
||
goto error;
|
||
}
|
||
length = Tcl_UniCharToUtf(code, buf);
|
||
#if TCL_UTF_MAX > 3
|
||
if ((code >= 0xD800) && (length < 3)) {
|
||
/* Special case for handling high surrogates. */
|
||
length += Tcl_UniCharToUtf(-1, buf + length);
|
||
}
|
||
#endif
|
||
segment = Tcl_NewStringObj(buf, length);
|
||
Tcl_IncrRefCount(segment);
|
||
allocSegment = 1;
|
||
break;
|
||
}
|
||
|
||
case 'u':
|
||
if (useBig) {
|
||
msg = "unsigned bignum format is invalid";
|
||
errCode = "BADUNSIGNED";
|
||
goto errorMsg;
|
||
}
|
||
/* FALLTHRU */
|
||
case 'd':
|
||
case 'o':
|
||
case 'x':
|
||
case 'X':
|
||
case 'b': {
|
||
short s = 0; /* Silence compiler warning; only defined and
|
||
* used when useShort is true. */
|
||
long l;
|
||
Tcl_WideInt w;
|
||
mp_int big;
|
||
int toAppend, isNegative = 0;
|
||
|
||
if (useBig) {
|
||
if (Tcl_GetBignumFromObj(interp, segment, &big) != TCL_OK) {
|
||
goto error;
|
||
}
|
||
isNegative = (mp_cmp_d(&big, 0) == MP_LT);
|
||
#ifndef TCL_WIDE_INT_IS_LONG
|
||
} else if (useWide) {
|
||
if (Tcl_GetWideIntFromObj(NULL, segment, &w) != TCL_OK) {
|
||
Tcl_Obj *objPtr;
|
||
|
||
if (Tcl_GetBignumFromObj(interp,segment,&big) != TCL_OK) {
|
||
goto error;
|
||
}
|
||
mp_mod_2d(&big, CHAR_BIT*sizeof(Tcl_WideInt), &big);
|
||
objPtr = Tcl_NewBignumObj(&big);
|
||
Tcl_IncrRefCount(objPtr);
|
||
Tcl_GetWideIntFromObj(NULL, objPtr, &w);
|
||
Tcl_DecrRefCount(objPtr);
|
||
}
|
||
isNegative = (w < (Tcl_WideInt) 0);
|
||
#endif
|
||
} else if (TclGetLongFromObj(NULL, segment, &l) != TCL_OK) {
|
||
if (Tcl_GetWideIntFromObj(NULL, segment, &w) != TCL_OK) {
|
||
Tcl_Obj *objPtr;
|
||
|
||
if (Tcl_GetBignumFromObj(interp,segment,&big) != TCL_OK) {
|
||
goto error;
|
||
}
|
||
mp_mod_2d(&big, CHAR_BIT * sizeof(long), &big);
|
||
objPtr = Tcl_NewBignumObj(&big);
|
||
Tcl_IncrRefCount(objPtr);
|
||
TclGetLongFromObj(NULL, objPtr, &l);
|
||
Tcl_DecrRefCount(objPtr);
|
||
} else {
|
||
l = Tcl_WideAsLong(w);
|
||
}
|
||
if (useShort) {
|
||
s = (short) l;
|
||
isNegative = (s < (short) 0);
|
||
} else {
|
||
isNegative = (l < (long) 0);
|
||
}
|
||
} else if (useShort) {
|
||
s = (short) l;
|
||
isNegative = (s < (short) 0);
|
||
} else {
|
||
isNegative = (l < (long) 0);
|
||
}
|
||
|
||
TclNewObj(segment);
|
||
allocSegment = 1;
|
||
segmentLimit = INT_MAX;
|
||
Tcl_IncrRefCount(segment);
|
||
|
||
if ((isNegative || gotPlus || gotSpace) && (useBig || ch=='d')) {
|
||
Tcl_AppendToObj(segment,
|
||
(isNegative ? "-" : gotPlus ? "+" : " "), 1);
|
||
segmentLimit -= 1;
|
||
}
|
||
|
||
if (gotHash) {
|
||
switch (ch) {
|
||
case 'o':
|
||
Tcl_AppendToObj(segment, "0", 1);
|
||
segmentLimit -= 1;
|
||
precision--;
|
||
break;
|
||
case 'X':
|
||
Tcl_AppendToObj(segment, "0X", 2);
|
||
segmentLimit -= 2;
|
||
break;
|
||
case 'x':
|
||
Tcl_AppendToObj(segment, "0x", 2);
|
||
segmentLimit -= 2;
|
||
break;
|
||
case 'b':
|
||
Tcl_AppendToObj(segment, "0b", 2);
|
||
segmentLimit -= 2;
|
||
break;
|
||
}
|
||
}
|
||
|
||
switch (ch) {
|
||
case 'd': {
|
||
int length;
|
||
Tcl_Obj *pure;
|
||
const char *bytes;
|
||
|
||
if (useShort) {
|
||
TclNewIntObj(pure, (int) s);
|
||
#ifndef TCL_WIDE_INT_IS_LONG
|
||
} else if (useWide) {
|
||
pure = Tcl_NewWideIntObj(w);
|
||
#endif
|
||
} else if (useBig) {
|
||
pure = Tcl_NewBignumObj(&big);
|
||
} else {
|
||
pure = Tcl_NewLongObj(l);
|
||
}
|
||
Tcl_IncrRefCount(pure);
|
||
bytes = TclGetStringFromObj(pure, &length);
|
||
|
||
/*
|
||
* Already did the sign above.
|
||
*/
|
||
|
||
if (*bytes == '-') {
|
||
length--;
|
||
bytes++;
|
||
}
|
||
toAppend = length;
|
||
|
||
/*
|
||
* Canonical decimal string reps for integers are composed
|
||
* entirely of one-byte encoded characters, so "length" is the
|
||
* number of chars.
|
||
*/
|
||
|
||
if (gotPrecision) {
|
||
if (length < precision) {
|
||
segmentLimit -= precision - length;
|
||
}
|
||
while (length < precision) {
|
||
Tcl_AppendToObj(segment, "0", 1);
|
||
length++;
|
||
}
|
||
gotZero = 0;
|
||
}
|
||
if (gotZero) {
|
||
length += Tcl_GetCharLength(segment);
|
||
if (length < width) {
|
||
segmentLimit -= width - length;
|
||
}
|
||
while (length < width) {
|
||
Tcl_AppendToObj(segment, "0", 1);
|
||
length++;
|
||
}
|
||
}
|
||
if (toAppend > segmentLimit) {
|
||
msg = overflow;
|
||
errCode = "OVERFLOW";
|
||
goto errorMsg;
|
||
}
|
||
Tcl_AppendToObj(segment, bytes, toAppend);
|
||
Tcl_DecrRefCount(pure);
|
||
break;
|
||
}
|
||
|
||
case 'u':
|
||
case 'o':
|
||
case 'x':
|
||
case 'X':
|
||
case 'b': {
|
||
Tcl_WideUInt bits = (Tcl_WideUInt) 0;
|
||
Tcl_WideInt numDigits = (Tcl_WideInt) 0;
|
||
int length, numBits = 4, base = 16, index = 0, shift = 0;
|
||
Tcl_Obj *pure;
|
||
char *bytes;
|
||
|
||
if (ch == 'u') {
|
||
base = 10;
|
||
} else if (ch == 'o') {
|
||
base = 8;
|
||
numBits = 3;
|
||
} else if (ch == 'b') {
|
||
base = 2;
|
||
numBits = 1;
|
||
}
|
||
if (useShort) {
|
||
unsigned short us = (unsigned short) s;
|
||
|
||
bits = (Tcl_WideUInt) us;
|
||
while (us) {
|
||
numDigits++;
|
||
us /= base;
|
||
}
|
||
#ifndef TCL_WIDE_INT_IS_LONG
|
||
} else if (useWide) {
|
||
Tcl_WideUInt uw = (Tcl_WideUInt) w;
|
||
|
||
bits = uw;
|
||
while (uw) {
|
||
numDigits++;
|
||
uw /= base;
|
||
}
|
||
#endif
|
||
} else if (useBig && big.used) {
|
||
int leftover = (big.used * MP_DIGIT_BIT) % numBits;
|
||
mp_digit mask = (~(mp_digit)0) << (MP_DIGIT_BIT-leftover);
|
||
|
||
numDigits = 1 +
|
||
(((Tcl_WideInt) big.used * MP_DIGIT_BIT) / numBits);
|
||
while ((mask & big.dp[big.used-1]) == 0) {
|
||
numDigits--;
|
||
mask >>= numBits;
|
||
}
|
||
if (numDigits > INT_MAX) {
|
||
msg = overflow;
|
||
errCode = "OVERFLOW";
|
||
goto errorMsg;
|
||
}
|
||
} else if (!useBig) {
|
||
unsigned long ul = (unsigned long) l;
|
||
|
||
bits = (Tcl_WideUInt) ul;
|
||
while (ul) {
|
||
numDigits++;
|
||
ul /= base;
|
||
}
|
||
}
|
||
|
||
/*
|
||
* Need to be sure zero becomes "0", not "".
|
||
*/
|
||
|
||
if ((numDigits == 0) && !((ch == 'o') && gotHash)) {
|
||
numDigits = 1;
|
||
}
|
||
TclNewObj(pure);
|
||
Tcl_SetObjLength(pure, (int) numDigits);
|
||
bytes = TclGetString(pure);
|
||
toAppend = length = (int) numDigits;
|
||
while (numDigits--) {
|
||
int digitOffset;
|
||
|
||
if (useBig && big.used) {
|
||
if (index < big.used && (size_t) shift <
|
||
CHAR_BIT*sizeof(Tcl_WideUInt) - MP_DIGIT_BIT) {
|
||
bits |= ((Tcl_WideUInt) big.dp[index++]) << shift;
|
||
shift += MP_DIGIT_BIT;
|
||
}
|
||
shift -= numBits;
|
||
}
|
||
digitOffset = (int) (bits % base);
|
||
if (digitOffset > 9) {
|
||
if (ch == 'X') {
|
||
bytes[numDigits] = 'A' + digitOffset - 10;
|
||
} else {
|
||
bytes[numDigits] = 'a' + digitOffset - 10;
|
||
}
|
||
} else {
|
||
bytes[numDigits] = '0' + digitOffset;
|
||
}
|
||
bits /= base;
|
||
}
|
||
if (useBig) {
|
||
mp_clear(&big);
|
||
}
|
||
if (gotPrecision) {
|
||
if (length < precision) {
|
||
segmentLimit -= precision - length;
|
||
}
|
||
while (length < precision) {
|
||
Tcl_AppendToObj(segment, "0", 1);
|
||
length++;
|
||
}
|
||
gotZero = 0;
|
||
}
|
||
if (gotZero) {
|
||
length += Tcl_GetCharLength(segment);
|
||
if (length < width) {
|
||
segmentLimit -= width - length;
|
||
}
|
||
while (length < width) {
|
||
Tcl_AppendToObj(segment, "0", 1);
|
||
length++;
|
||
}
|
||
}
|
||
if (toAppend > segmentLimit) {
|
||
msg = overflow;
|
||
errCode = "OVERFLOW";
|
||
goto errorMsg;
|
||
}
|
||
Tcl_AppendObjToObj(segment, pure);
|
||
Tcl_DecrRefCount(pure);
|
||
break;
|
||
}
|
||
|
||
}
|
||
break;
|
||
}
|
||
|
||
case 'e':
|
||
case 'E':
|
||
case 'f':
|
||
case 'g':
|
||
case 'G': {
|
||
#define MAX_FLOAT_SIZE 320
|
||
char spec[2*TCL_INTEGER_SPACE + 9], *p = spec;
|
||
double d;
|
||
int length = MAX_FLOAT_SIZE;
|
||
char *bytes;
|
||
|
||
if (Tcl_GetDoubleFromObj(interp, segment, &d) != TCL_OK) {
|
||
/* TODO: Figure out ACCEPT_NAN here */
|
||
goto error;
|
||
}
|
||
*p++ = '%';
|
||
if (gotMinus) {
|
||
*p++ = '-';
|
||
}
|
||
if (gotHash) {
|
||
*p++ = '#';
|
||
}
|
||
if (gotZero) {
|
||
*p++ = '0';
|
||
}
|
||
if (gotSpace) {
|
||
*p++ = ' ';
|
||
}
|
||
if (gotPlus) {
|
||
*p++ = '+';
|
||
}
|
||
if (width) {
|
||
p += sprintf(p, "%d", width);
|
||
if (width > length) {
|
||
length = width;
|
||
}
|
||
}
|
||
if (gotPrecision) {
|
||
*p++ = '.';
|
||
p += sprintf(p, "%d", precision);
|
||
if (precision > INT_MAX - length) {
|
||
msg = overflow;
|
||
errCode = "OVERFLOW";
|
||
goto errorMsg;
|
||
}
|
||
length += precision;
|
||
}
|
||
|
||
/*
|
||
* Don't pass length modifiers!
|
||
*/
|
||
|
||
*p++ = (char) ch;
|
||
*p = '\0';
|
||
|
||
TclNewObj(segment);
|
||
allocSegment = 1;
|
||
if (!Tcl_AttemptSetObjLength(segment, length)) {
|
||
msg = overflow;
|
||
errCode = "OVERFLOW";
|
||
goto errorMsg;
|
||
}
|
||
bytes = TclGetString(segment);
|
||
if (!Tcl_AttemptSetObjLength(segment, sprintf(bytes, spec, d))) {
|
||
msg = overflow;
|
||
errCode = "OVERFLOW";
|
||
goto errorMsg;
|
||
}
|
||
break;
|
||
}
|
||
default:
|
||
if (interp != NULL) {
|
||
Tcl_SetObjResult(interp,
|
||
Tcl_ObjPrintf("bad field specifier \"%c\"", ch));
|
||
Tcl_SetErrorCode(interp, "TCL", "FORMAT", "BADTYPE", NULL);
|
||
}
|
||
goto error;
|
||
}
|
||
|
||
if (width>0 && numChars<0) {
|
||
numChars = Tcl_GetCharLength(segment);
|
||
}
|
||
if (!gotMinus && width>0) {
|
||
if (numChars < width) {
|
||
limit -= width - numChars;
|
||
}
|
||
while (numChars < width) {
|
||
Tcl_AppendToObj(appendObj, (gotZero ? "0" : " "), 1);
|
||
numChars++;
|
||
}
|
||
}
|
||
|
||
TclGetStringFromObj(segment, &segmentNumBytes);
|
||
if (segmentNumBytes > limit) {
|
||
if (allocSegment) {
|
||
Tcl_DecrRefCount(segment);
|
||
}
|
||
msg = overflow;
|
||
errCode = "OVERFLOW";
|
||
goto errorMsg;
|
||
}
|
||
Tcl_AppendObjToObj(appendObj, segment);
|
||
limit -= segmentNumBytes;
|
||
if (allocSegment) {
|
||
Tcl_DecrRefCount(segment);
|
||
}
|
||
if (width > 0) {
|
||
if (numChars < width) {
|
||
limit -= width-numChars;
|
||
}
|
||
while (numChars < width) {
|
||
Tcl_AppendToObj(appendObj, (gotZero ? "0" : " "), 1);
|
||
numChars++;
|
||
}
|
||
}
|
||
|
||
objIndex += gotSequential;
|
||
}
|
||
if (numBytes) {
|
||
if (numBytes > limit) {
|
||
msg = overflow;
|
||
errCode = "OVERFLOW";
|
||
goto errorMsg;
|
||
}
|
||
Tcl_AppendToObj(appendObj, span, numBytes);
|
||
limit -= numBytes;
|
||
numBytes = 0;
|
||
}
|
||
|
||
return TCL_OK;
|
||
|
||
errorMsg:
|
||
if (interp != NULL) {
|
||
Tcl_SetObjResult(interp, Tcl_NewStringObj(msg, -1));
|
||
Tcl_SetErrorCode(interp, "TCL", "FORMAT", errCode, NULL);
|
||
}
|
||
error:
|
||
Tcl_SetObjLength(appendObj, originalLength);
|
||
return TCL_ERROR;
|
||
}
|
||
|
||
/*
|
||
*---------------------------------------------------------------------------
|
||
*
|
||
* Tcl_Format --
|
||
*
|
||
* Results:
|
||
* A refcount zero Tcl_Obj.
|
||
*
|
||
* Side effects:
|
||
* None.
|
||
*
|
||
*---------------------------------------------------------------------------
|
||
*/
|
||
|
||
Tcl_Obj *
|
||
Tcl_Format(
|
||
Tcl_Interp *interp,
|
||
const char *format,
|
||
int objc,
|
||
Tcl_Obj *const objv[])
|
||
{
|
||
int result;
|
||
Tcl_Obj *objPtr;
|
||
|
||
TclNewObj(objPtr);
|
||
result = Tcl_AppendFormatToObj(interp, objPtr, format, objc, objv);
|
||
if (result != TCL_OK) {
|
||
Tcl_DecrRefCount(objPtr);
|
||
return NULL;
|
||
}
|
||
return objPtr;
|
||
}
|
||
|
||
/*
|
||
*---------------------------------------------------------------------------
|
||
*
|
||
* AppendPrintfToObjVA --
|
||
*
|
||
* Results:
|
||
*
|
||
* Side effects:
|
||
*
|
||
*---------------------------------------------------------------------------
|
||
*/
|
||
|
||
static void
|
||
AppendPrintfToObjVA(
|
||
Tcl_Obj *objPtr,
|
||
const char *format,
|
||
va_list argList)
|
||
{
|
||
int code, objc;
|
||
Tcl_Obj **objv, *list;
|
||
const char *p;
|
||
|
||
TclNewObj(list);
|
||
p = format;
|
||
Tcl_IncrRefCount(list);
|
||
while (*p != '\0') {
|
||
int size = 0, seekingConversion = 1, gotPrecision = 0;
|
||
int lastNum = -1;
|
||
|
||
if (*p++ != '%') {
|
||
continue;
|
||
}
|
||
if (*p == '%') {
|
||
p++;
|
||
continue;
|
||
}
|
||
do {
|
||
switch (*p) {
|
||
case '\0':
|
||
seekingConversion = 0;
|
||
break;
|
||
case 's': {
|
||
const char *q, *end, *bytes = va_arg(argList, char *);
|
||
seekingConversion = 0;
|
||
|
||
/*
|
||
* The buffer to copy characters from starts at bytes and ends
|
||
* at either the first NUL byte, or after lastNum bytes, when
|
||
* caller has indicated a limit.
|
||
*/
|
||
|
||
end = bytes;
|
||
while ((!gotPrecision || lastNum--) && (*end != '\0')) {
|
||
end++;
|
||
}
|
||
|
||
/*
|
||
* Within that buffer, we trim both ends if needed so that we
|
||
* copy only whole characters, and avoid copying any partial
|
||
* multi-byte characters.
|
||
*/
|
||
|
||
q = TclUtfPrev(end, bytes);
|
||
if (!Tcl_UtfCharComplete(q, (int)(end - q))) {
|
||
end = q;
|
||
}
|
||
|
||
q = bytes + TCL_UTF_MAX;
|
||
while ((bytes < end) && (bytes < q)
|
||
&& ((*bytes & 0xC0) == 0x80)) {
|
||
bytes++;
|
||
}
|
||
|
||
Tcl_ListObjAppendElement(NULL, list,
|
||
Tcl_NewStringObj(bytes , (int)(end - bytes)));
|
||
|
||
break;
|
||
}
|
||
case 'c':
|
||
case 'i':
|
||
case 'u':
|
||
case 'd':
|
||
case 'o':
|
||
case 'x':
|
||
case 'X':
|
||
seekingConversion = 0;
|
||
switch (size) {
|
||
case -1:
|
||
case 0:
|
||
Tcl_ListObjAppendElement(NULL, list, Tcl_NewLongObj(
|
||
(long) va_arg(argList, int)));
|
||
break;
|
||
case 1:
|
||
Tcl_ListObjAppendElement(NULL, list, Tcl_NewLongObj(
|
||
va_arg(argList, long)));
|
||
break;
|
||
}
|
||
break;
|
||
case 'e':
|
||
case 'E':
|
||
case 'f':
|
||
case 'g':
|
||
case 'G':
|
||
Tcl_ListObjAppendElement(NULL, list, Tcl_NewDoubleObj(
|
||
va_arg(argList, double)));
|
||
seekingConversion = 0;
|
||
break;
|
||
case '*':
|
||
lastNum = (int) va_arg(argList, int);
|
||
Tcl_ListObjAppendElement(NULL, list, Tcl_NewIntObj(lastNum));
|
||
p++;
|
||
break;
|
||
case '0': case '1': case '2': case '3': case '4':
|
||
case '5': case '6': case '7': case '8': case '9': {
|
||
char *end;
|
||
|
||
lastNum = (int) strtoul(p, &end, 10);
|
||
p = end;
|
||
break;
|
||
}
|
||
case '.':
|
||
gotPrecision = 1;
|
||
p++;
|
||
break;
|
||
/* TODO: support for wide (and bignum?) arguments */
|
||
case 'l':
|
||
size = 1;
|
||
p++;
|
||
break;
|
||
case 'h':
|
||
size = -1;
|
||
/* FALLTHRU */
|
||
default:
|
||
p++;
|
||
}
|
||
} while (seekingConversion);
|
||
}
|
||
TclListObjGetElements(NULL, list, &objc, &objv);
|
||
code = Tcl_AppendFormatToObj(NULL, objPtr, format, objc, objv);
|
||
if (code != TCL_OK) {
|
||
Tcl_AppendPrintfToObj(objPtr,
|
||
"Unable to format \"%s\" with supplied arguments: %s",
|
||
format, Tcl_GetString(list));
|
||
}
|
||
Tcl_DecrRefCount(list);
|
||
}
|
||
|
||
/*
|
||
*---------------------------------------------------------------------------
|
||
*
|
||
* Tcl_AppendPrintfToObj --
|
||
*
|
||
* Results:
|
||
* A standard Tcl result.
|
||
*
|
||
* Side effects:
|
||
* None.
|
||
*
|
||
*---------------------------------------------------------------------------
|
||
*/
|
||
|
||
void
|
||
Tcl_AppendPrintfToObj(
|
||
Tcl_Obj *objPtr,
|
||
const char *format,
|
||
...)
|
||
{
|
||
va_list argList;
|
||
|
||
va_start(argList, format);
|
||
AppendPrintfToObjVA(objPtr, format, argList);
|
||
va_end(argList);
|
||
}
|
||
|
||
/*
|
||
*---------------------------------------------------------------------------
|
||
*
|
||
* Tcl_ObjPrintf --
|
||
*
|
||
* Results:
|
||
* A refcount zero Tcl_Obj.
|
||
*
|
||
* Side effects:
|
||
* None.
|
||
*
|
||
*---------------------------------------------------------------------------
|
||
*/
|
||
|
||
Tcl_Obj *
|
||
Tcl_ObjPrintf(
|
||
const char *format,
|
||
...)
|
||
{
|
||
va_list argList;
|
||
Tcl_Obj *objPtr;
|
||
|
||
TclNewObj(objPtr);
|
||
va_start(argList, format);
|
||
AppendPrintfToObjVA(objPtr, format, argList);
|
||
va_end(argList);
|
||
return objPtr;
|
||
}
|
||
|
||
/*
|
||
*---------------------------------------------------------------------------
|
||
*
|
||
* TclGetStringStorage --
|
||
*
|
||
* Returns the string storage space of a Tcl_Obj.
|
||
*
|
||
* Results:
|
||
* The pointer value objPtr->bytes is returned and the number of bytes
|
||
* allocated there is written to *sizePtr (if known).
|
||
*
|
||
* Side effects:
|
||
* May set objPtr->bytes.
|
||
*
|
||
*---------------------------------------------------------------------------
|
||
*/
|
||
|
||
char *
|
||
TclGetStringStorage(
|
||
Tcl_Obj *objPtr,
|
||
unsigned int *sizePtr)
|
||
{
|
||
String *stringPtr;
|
||
|
||
if (objPtr->typePtr != &tclStringType || objPtr->bytes == NULL) {
|
||
return TclGetStringFromObj(objPtr, (int *)sizePtr);
|
||
}
|
||
|
||
stringPtr = GET_STRING(objPtr);
|
||
*sizePtr = stringPtr->allocated;
|
||
return objPtr->bytes;
|
||
}
|
||
/*
|
||
*---------------------------------------------------------------------------
|
||
*
|
||
* TclStringReverse --
|
||
*
|
||
* Implements the [string reverse] operation.
|
||
*
|
||
* Results:
|
||
* An unshared Tcl value which is the [string reverse] of the argument
|
||
* supplied. When sharing rules permit, the returned value might be the
|
||
* argument with modifications done in place.
|
||
*
|
||
* Side effects:
|
||
* May allocate a new Tcl_Obj.
|
||
*
|
||
*---------------------------------------------------------------------------
|
||
*/
|
||
|
||
static void
|
||
ReverseBytes(
|
||
unsigned char *to, /* Copy bytes into here... */
|
||
unsigned char *from, /* ...from here... */
|
||
int count) /* Until this many are copied, */
|
||
/* reversing as you go. */
|
||
{
|
||
unsigned char *src = from + count;
|
||
|
||
if (to == from) {
|
||
/* Reversing in place */
|
||
while (--src > to) {
|
||
unsigned char c = *src;
|
||
|
||
*src = *to;
|
||
*to++ = c;
|
||
}
|
||
} else {
|
||
while (--src >= from) {
|
||
*to++ = *src;
|
||
}
|
||
}
|
||
}
|
||
|
||
Tcl_Obj *
|
||
TclStringReverse(
|
||
Tcl_Obj *objPtr)
|
||
{
|
||
String *stringPtr;
|
||
Tcl_UniChar ch = 0;
|
||
#if TCL_UTF_MAX <= 4
|
||
int needFlip = 0;
|
||
#endif
|
||
|
||
if (TclIsPureByteArray(objPtr)) {
|
||
int numBytes;
|
||
unsigned char *from = Tcl_GetByteArrayFromObj(objPtr, &numBytes);
|
||
|
||
if (Tcl_IsShared(objPtr)) {
|
||
objPtr = Tcl_NewByteArrayObj(NULL, numBytes);
|
||
}
|
||
ReverseBytes(Tcl_GetByteArrayFromObj(objPtr, NULL), from, numBytes);
|
||
return objPtr;
|
||
}
|
||
|
||
SetStringFromAny(NULL, objPtr);
|
||
stringPtr = GET_STRING(objPtr);
|
||
|
||
if (stringPtr->hasUnicode) {
|
||
Tcl_UniChar *from = Tcl_GetUnicode(objPtr);
|
||
Tcl_UniChar *src = from + stringPtr->numChars;
|
||
Tcl_UniChar *to;
|
||
|
||
if (Tcl_IsShared(objPtr)) {
|
||
/*
|
||
* Create a non-empty, pure unicode value, so we can coax
|
||
* Tcl_SetObjLength into growing the unicode rep buffer.
|
||
*/
|
||
|
||
objPtr = Tcl_NewUnicodeObj(&ch, 1);
|
||
Tcl_SetObjLength(objPtr, stringPtr->numChars);
|
||
to = Tcl_GetUnicode(objPtr);
|
||
while (--src >= from) {
|
||
#if TCL_UTF_MAX <= 4
|
||
ch = *src;
|
||
if ((ch & 0xF800) == 0xD800) {
|
||
needFlip = 1;
|
||
}
|
||
*to++ = ch;
|
||
#else
|
||
*to++ = *src;
|
||
#endif
|
||
}
|
||
} else {
|
||
/*
|
||
* Reversing in place.
|
||
*/
|
||
|
||
#if TCL_UTF_MAX <= 4
|
||
to = src;
|
||
#endif
|
||
while (--src > from) {
|
||
ch = *src;
|
||
#if TCL_UTF_MAX <= 4
|
||
if ((ch & 0xF800) == 0xD800) {
|
||
needFlip = 1;
|
||
}
|
||
#endif
|
||
*src = *from;
|
||
*from++ = ch;
|
||
}
|
||
}
|
||
#if TCL_UTF_MAX <= 4
|
||
if (needFlip) {
|
||
/*
|
||
* Flip back surrogate pairs.
|
||
*/
|
||
|
||
from = to - stringPtr->numChars;
|
||
while (--to >= from) {
|
||
ch = *to;
|
||
if ((ch & 0xFC00) == 0xD800) {
|
||
if ((to-1 >= from) && ((to[-1] & 0xFC00) == 0xDC00)) {
|
||
to[0] = to[-1];
|
||
to[-1] = ch;
|
||
--to;
|
||
}
|
||
}
|
||
}
|
||
}
|
||
#endif
|
||
}
|
||
|
||
if (objPtr->bytes) {
|
||
int numChars = stringPtr->numChars;
|
||
int numBytes = objPtr->length;
|
||
char *to, *from = objPtr->bytes;
|
||
|
||
if (Tcl_IsShared(objPtr)) {
|
||
TclNewObj(objPtr);
|
||
Tcl_SetObjLength(objPtr, numBytes);
|
||
}
|
||
to = objPtr->bytes;
|
||
|
||
if (numChars < numBytes) {
|
||
/*
|
||
* Either numChars == -1 and we don't know how many chars are
|
||
* represented by objPtr->bytes and we need Pass 1 just in case,
|
||
* or numChars >= 0 and we know we have fewer chars than bytes, so
|
||
* we know there's a multibyte character needing Pass 1.
|
||
*
|
||
* Pass 1. Reverse the bytes of each multi-byte character.
|
||
*/
|
||
|
||
int bytesLeft = numBytes;
|
||
int chw;
|
||
|
||
while (bytesLeft) {
|
||
/*
|
||
* NOTE: We know that the from buffer is NUL-terminated. It's
|
||
* part of the contract for objPtr->bytes values. Thus, we can
|
||
* skip calling Tcl_UtfCharComplete() here.
|
||
*/
|
||
|
||
int bytesInChar = TclUtfToUCS4(from, &chw);
|
||
|
||
ReverseBytes((unsigned char *)to, (unsigned char *)from,
|
||
bytesInChar);
|
||
to += bytesInChar;
|
||
from += bytesInChar;
|
||
bytesLeft -= bytesInChar;
|
||
}
|
||
|
||
from = to = objPtr->bytes;
|
||
}
|
||
/* Pass 2. Reverse all the bytes. */
|
||
ReverseBytes((unsigned char *)to, (unsigned char *)from, numBytes);
|
||
}
|
||
|
||
return objPtr;
|
||
}
|
||
|
||
/*
|
||
*---------------------------------------------------------------------------
|
||
*
|
||
* FillUnicodeRep --
|
||
*
|
||
* Populate the Unicode internal rep with the Unicode form of its string
|
||
* rep. The object must alread have a "String" internal rep.
|
||
*
|
||
* Results:
|
||
* None.
|
||
*
|
||
* Side effects:
|
||
* Reallocates the String internal rep.
|
||
*
|
||
*---------------------------------------------------------------------------
|
||
*/
|
||
|
||
static void
|
||
FillUnicodeRep(
|
||
Tcl_Obj *objPtr) /* The object in which to fill the unicode
|
||
* rep. */
|
||
{
|
||
String *stringPtr = GET_STRING(objPtr);
|
||
|
||
ExtendUnicodeRepWithString(objPtr, objPtr->bytes, objPtr->length,
|
||
stringPtr->numChars);
|
||
}
|
||
|
||
static void
|
||
ExtendUnicodeRepWithString(
|
||
Tcl_Obj *objPtr,
|
||
const char *bytes,
|
||
int numBytes,
|
||
int numAppendChars)
|
||
{
|
||
String *stringPtr = GET_STRING(objPtr);
|
||
int needed, numOrigChars = 0;
|
||
Tcl_UniChar *dst, unichar = 0;
|
||
|
||
if (stringPtr->hasUnicode) {
|
||
numOrigChars = stringPtr->numChars;
|
||
}
|
||
if (numAppendChars == -1) {
|
||
TclNumUtfChars(numAppendChars, bytes, numBytes);
|
||
}
|
||
needed = numOrigChars + numAppendChars;
|
||
stringCheckLimits(needed);
|
||
|
||
if (needed > stringPtr->maxChars) {
|
||
GrowUnicodeBuffer(objPtr, needed);
|
||
stringPtr = GET_STRING(objPtr);
|
||
}
|
||
|
||
stringPtr->hasUnicode = 1;
|
||
if (bytes) {
|
||
stringPtr->numChars = needed;
|
||
} else {
|
||
numAppendChars = 0;
|
||
}
|
||
for (dst=stringPtr->unicode + numOrigChars; numAppendChars-- > 0; dst++) {
|
||
bytes += TclUtfToUniChar(bytes, &unichar);
|
||
*dst = unichar;
|
||
}
|
||
*dst = 0;
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* DupStringInternalRep --
|
||
*
|
||
* Initialize the internal representation of a new Tcl_Obj to a copy of
|
||
* the internal representation of an existing string object.
|
||
*
|
||
* Results:
|
||
* None.
|
||
*
|
||
* Side effects:
|
||
* copyPtr's internal rep is set to a copy of srcPtr's internal
|
||
* representation.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
static void
|
||
DupStringInternalRep(
|
||
Tcl_Obj *srcPtr, /* Object with internal rep to copy. Must have
|
||
* an internal rep of type "String". */
|
||
Tcl_Obj *copyPtr) /* Object with internal rep to set. Must not
|
||
* currently have an internal rep.*/
|
||
{
|
||
String *srcStringPtr = GET_STRING(srcPtr);
|
||
String *copyStringPtr = NULL;
|
||
|
||
#if COMPAT==0
|
||
if (srcStringPtr->numChars == -1) {
|
||
/*
|
||
* The String struct in the source value holds zero useful data. Don't
|
||
* bother copying it. Don't even bother allocating space in which to
|
||
* copy it. Just let the copy be untyped.
|
||
*/
|
||
|
||
return;
|
||
}
|
||
|
||
if (srcStringPtr->hasUnicode) {
|
||
int copyMaxChars;
|
||
|
||
if (srcStringPtr->maxChars / 2 >= srcStringPtr->numChars) {
|
||
copyMaxChars = 2 * srcStringPtr->numChars;
|
||
} else {
|
||
copyMaxChars = srcStringPtr->maxChars;
|
||
}
|
||
copyStringPtr = stringAttemptAlloc(copyMaxChars);
|
||
if (copyStringPtr == NULL) {
|
||
copyMaxChars = srcStringPtr->numChars;
|
||
copyStringPtr = stringAlloc(copyMaxChars);
|
||
}
|
||
copyStringPtr->maxChars = copyMaxChars;
|
||
memcpy(copyStringPtr->unicode, srcStringPtr->unicode,
|
||
srcStringPtr->numChars * sizeof(Tcl_UniChar));
|
||
copyStringPtr->unicode[srcStringPtr->numChars] = 0;
|
||
} else {
|
||
copyStringPtr = stringAlloc(0);
|
||
copyStringPtr->maxChars = 0;
|
||
copyStringPtr->unicode[0] = 0;
|
||
}
|
||
copyStringPtr->hasUnicode = srcStringPtr->hasUnicode;
|
||
copyStringPtr->numChars = srcStringPtr->numChars;
|
||
|
||
/*
|
||
* Tricky point: the string value was copied by generic object management
|
||
* code, so it doesn't contain any extra bytes that might exist in the
|
||
* source object.
|
||
*/
|
||
|
||
copyStringPtr->allocated = copyPtr->bytes ? copyPtr->length : 0;
|
||
#else /* COMPAT!=0 */
|
||
/*
|
||
* If the src obj is a string of 1-byte Utf chars, then copy the string
|
||
* rep of the source object and create an "empty" Unicode internal rep for
|
||
* the new object. Otherwise, copy Unicode internal rep, and invalidate
|
||
* the string rep of the new object.
|
||
*/
|
||
|
||
if (srcStringPtr->hasUnicode && srcStringPtr->numChars > 0) {
|
||
/*
|
||
* Copy the full allocation for the Unicode buffer.
|
||
*/
|
||
|
||
copyStringPtr = stringAlloc(srcStringPtr->maxChars);
|
||
copyStringPtr->maxChars = srcStringPtr->maxChars;
|
||
memcpy(copyStringPtr->unicode, srcStringPtr->unicode,
|
||
srcStringPtr->numChars * sizeof(Tcl_UniChar));
|
||
copyStringPtr->unicode[srcStringPtr->numChars] = 0;
|
||
copyStringPtr->allocated = 0;
|
||
} else {
|
||
copyStringPtr = stringAlloc(0);
|
||
copyStringPtr->unicode[0] = 0;
|
||
copyStringPtr->maxChars = 0;
|
||
|
||
/*
|
||
* Tricky point: the string value was copied by generic object
|
||
* management code, so it doesn't contain any extra bytes that might
|
||
* exist in the source object.
|
||
*/
|
||
|
||
copyStringPtr->allocated = copyPtr->length;
|
||
}
|
||
copyStringPtr->numChars = srcStringPtr->numChars;
|
||
copyStringPtr->hasUnicode = srcStringPtr->hasUnicode;
|
||
#endif /* COMPAT==0 */
|
||
|
||
SET_STRING(copyPtr, copyStringPtr);
|
||
copyPtr->typePtr = &tclStringType;
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* SetStringFromAny --
|
||
*
|
||
* Create an internal representation of type "String" for an object.
|
||
*
|
||
* Results:
|
||
* This operation always succeeds and returns TCL_OK.
|
||
*
|
||
* Side effects:
|
||
* Any old internal reputation for objPtr is freed and the internal
|
||
* representation is set to "String".
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
static int
|
||
SetStringFromAny(
|
||
Tcl_Interp *interp, /* Used for error reporting if not NULL. */
|
||
Tcl_Obj *objPtr) /* The object to convert. */
|
||
{
|
||
if (objPtr->typePtr != &tclStringType) {
|
||
String *stringPtr = stringAlloc(0);
|
||
|
||
/*
|
||
* Convert whatever we have into an untyped value. Just A String.
|
||
*/
|
||
|
||
(void) TclGetString(objPtr);
|
||
TclFreeIntRep(objPtr);
|
||
|
||
/*
|
||
* Create a basic String internalrep that just points to the UTF-8 string
|
||
* already in place at objPtr->bytes.
|
||
*/
|
||
|
||
stringPtr->numChars = -1;
|
||
stringPtr->allocated = objPtr->length;
|
||
stringPtr->maxChars = 0;
|
||
stringPtr->hasUnicode = 0;
|
||
SET_STRING(objPtr, stringPtr);
|
||
objPtr->typePtr = &tclStringType;
|
||
}
|
||
return TCL_OK;
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* UpdateStringOfString --
|
||
*
|
||
* Update the string representation for an object whose internal
|
||
* representation is "String".
|
||
*
|
||
* Results:
|
||
* None.
|
||
*
|
||
* Side effects:
|
||
* The object's string may be set by converting its Unicode represention
|
||
* to UTF format.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
static void
|
||
UpdateStringOfString(
|
||
Tcl_Obj *objPtr) /* Object with string rep to update. */
|
||
{
|
||
String *stringPtr = GET_STRING(objPtr);
|
||
|
||
/*
|
||
* This routine is only called when we need to generate the
|
||
* string rep objPtr->bytes because it does not exist -- it is NULL.
|
||
* In that circumstance, any lingering claim about the size of
|
||
* memory pointed to by that NULL pointer is clearly bogus, and
|
||
* needs a reset.
|
||
*/
|
||
|
||
stringPtr->allocated = 0;
|
||
|
||
if (stringPtr->numChars == 0) {
|
||
TclInitStringRep(objPtr, tclEmptyStringRep, 0);
|
||
} else {
|
||
(void) ExtendStringRepWithUnicode(objPtr, stringPtr->unicode,
|
||
stringPtr->numChars);
|
||
}
|
||
}
|
||
|
||
static int
|
||
ExtendStringRepWithUnicode(
|
||
Tcl_Obj *objPtr,
|
||
const Tcl_UniChar *unicode,
|
||
int numChars)
|
||
{
|
||
/*
|
||
* Pre-condition: this is the "string" Tcl_ObjType.
|
||
*/
|
||
|
||
int i, origLength, size = 0;
|
||
char *dst, buf[4] = "";
|
||
String *stringPtr = GET_STRING(objPtr);
|
||
|
||
if (numChars < 0) {
|
||
numChars = UnicodeLength(unicode);
|
||
}
|
||
|
||
if (numChars == 0) {
|
||
return 0;
|
||
}
|
||
|
||
if (objPtr->bytes == NULL) {
|
||
objPtr->length = 0;
|
||
}
|
||
size = origLength = objPtr->length;
|
||
|
||
/*
|
||
* Quick cheap check in case we have more than enough room.
|
||
*/
|
||
|
||
if (numChars <= (INT_MAX - size)/TCL_UTF_MAX
|
||
&& stringPtr->allocated >= size + numChars * TCL_UTF_MAX) {
|
||
goto copyBytes;
|
||
}
|
||
|
||
for (i = 0; i < numChars && size >= 0; i++) {
|
||
size += Tcl_UniCharToUtf((int) unicode[i], buf);
|
||
}
|
||
if (size < 0) {
|
||
Tcl_Panic("max size for a Tcl value (%d bytes) exceeded", INT_MAX);
|
||
}
|
||
|
||
/*
|
||
* Grow space if needed.
|
||
*/
|
||
|
||
if (size > stringPtr->allocated) {
|
||
GrowStringBuffer(objPtr, size, 1);
|
||
}
|
||
|
||
copyBytes:
|
||
dst = objPtr->bytes + origLength;
|
||
for (i = 0; i < numChars; i++) {
|
||
dst += Tcl_UniCharToUtf(unicode[i], dst);
|
||
}
|
||
*dst = '\0';
|
||
objPtr->length = dst - objPtr->bytes;
|
||
return numChars;
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* FreeStringInternalRep --
|
||
*
|
||
* Deallocate the storage associated with a String data object's internal
|
||
* representation.
|
||
*
|
||
* Results:
|
||
* None.
|
||
*
|
||
* Side effects:
|
||
* Frees memory.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
static void
|
||
FreeStringInternalRep(
|
||
Tcl_Obj *objPtr) /* Object with internal rep to free. */
|
||
{
|
||
ckfree(GET_STRING(objPtr));
|
||
objPtr->typePtr = NULL;
|
||
}
|
||
|
||
/*
|
||
* Local Variables:
|
||
* mode: c
|
||
* c-basic-offset: 4
|
||
* fill-column: 78
|
||
* End:
|
||
*/
|