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-rw-r--r--generic/tclStringObj.c1458
1 files changed, 755 insertions, 703 deletions
diff --git a/generic/tclStringObj.c b/generic/tclStringObj.c
index 3f243a6..04cf4ee 100644
--- a/generic/tclStringObj.c
+++ b/generic/tclStringObj.c
@@ -38,6 +38,15 @@
#include "tommath.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:
*/
@@ -53,8 +62,14 @@ 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,
@@ -67,7 +82,7 @@ static void UpdateStringOfString(Tcl_Obj *objPtr);
* functions that can be invoked by generic object code.
*/
-Tcl_ObjType tclStringType = {
+const Tcl_ObjType tclStringType = {
"string", /* name */
FreeStringInternalRep, /* freeIntRepPro */
DupStringInternalRep, /* dupIntRepProc */
@@ -95,43 +110,40 @@ typedef struct String {
* means that there is a valid Unicode rep, or
* that the number of UTF bytes == the number
* of chars. */
- size_t allocated; /* The amount of space actually allocated for
+ int allocated; /* The amount of space actually allocated for
* the UTF string (minus 1 byte for the
* termination char). */
- size_t uallocated; /* The amount of space actually allocated for
- * the Unicode string (minus 2 bytes for the
- * termination char). */
+ int maxChars; /* Max number of chars that can fit in the
+ * space allocated for the unicode array. */
int hasUnicode; /* Boolean determining whether the string has
* a Unicode representation. */
- Tcl_UniChar unicode[2]; /* The array of Unicode chars. The actual size
- * of this field depends on the 'uallocated'
+ Tcl_UniChar unicode[1]; /* The array of Unicode chars. The actual size
+ * of this field depends on the 'maxChars'
* field above. */
} String;
#define STRING_MAXCHARS \
- (1 + (int)(((size_t)UINT_MAX - sizeof(String))/sizeof(Tcl_UniChar)))
-#define STRING_UALLOC(numChars) \
- ((numChars) * sizeof(Tcl_UniChar))
-#define STRING_SIZE(ualloc) \
- ((unsigned) ((ualloc) \
- ? (sizeof(String) - sizeof(Tcl_UniChar) + (ualloc)) \
- : sizeof(String)))
+ (int)(((size_t)UINT_MAX - sizeof(String))/sizeof(Tcl_UniChar))
+#define STRING_SIZE(numChars) \
+ (sizeof(String) + ((numChars) * sizeof(Tcl_UniChar)))
#define stringCheckLimits(numChars) \
if ((numChars) < 0 || (numChars) > STRING_MAXCHARS) { \
Tcl_Panic("max length for a Tcl unicode value (%d chars) exceeded", \
STRING_MAXCHARS); \
}
+#define stringAttemptAlloc(numChars) \
+ (String *) attemptckalloc((unsigned) STRING_SIZE(numChars) )
+#define stringAlloc(numChars) \
+ (String *) ckalloc((unsigned) STRING_SIZE(numChars) )
#define stringRealloc(ptr, numChars) \
- (String *) ckrealloc((char *) ptr, \
- (unsigned) STRING_SIZE(STRING_UALLOC(numChars)) )
+ (String *) ckrealloc((ptr), (unsigned) STRING_SIZE(numChars) )
#define stringAttemptRealloc(ptr, numChars) \
- (String *) attemptckrealloc((char *) ptr, \
- (unsigned) STRING_SIZE(STRING_UALLOC(numChars)) )
+ (String *) attemptckrealloc((ptr), (unsigned) STRING_SIZE(numChars) )
#define GET_STRING(objPtr) \
((String *) (objPtr)->internalRep.otherValuePtr)
#define SET_STRING(objPtr, stringPtr) \
((objPtr)->internalRep.otherValuePtr = (void *) (stringPtr))
-
+
/*
* TCL STRING GROWTH ALGORITHM
*
@@ -140,8 +152,7 @@ typedef struct String {
*
* Attempt to allocate 2 * (originalLength + appendLength)
* On failure:
- * attempt to allocate originalLength + 2*appendLength +
- * TCL_GROWTH_MIN_ALLOC
+ * 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
@@ -154,37 +165,93 @@ typedef struct String {
* cover the request, but which hopefully will be less than the total
* available memory.
*
- * The addition of TCL_GROWTH_MIN_ALLOC allows for efficient handling of very
+ * 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_GROWTH_MIN_ALLOC is a reasonable size, we can avoid that behavior.
+ * TCL_MIN_GROWTH is a reasonable size, we can avoid that behavior.
*
* The growth algorithm can be tuned by adjusting the following parameters:
*
- * TCL_GROWTH_MIN_ALLOC Additional space, in bytes, to allocate when
+ * TCL_MIN_GROWTH Additional space, in bytes, to allocate when
* the double allocation has failed. Default is
- * 1024 (1 kilobyte).
+ * 1024 (1 kilobyte). See tclInt.h.
*/
-#ifndef TCL_GROWTH_MIN_ALLOC
-#define TCL_GROWTH_MIN_ALLOC 1024
+#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) {
+ attempt = 2 * needed;
+ if (attempt >= 0) {
+ ptr = 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 = attemptckrealloc(objPtr->bytes, attempt + 1);
+ }
+ }
+ if (ptr == NULL) {
+ /*
+ * First allocation - just big enough; or last chance fallback.
+ */
+
+ attempt = needed;
+ ptr = ckrealloc(objPtr->bytes, attempt + 1);
+ }
+ objPtr->bytes = ptr;
+ stringPtr->allocated = attempt;
+}
+
+static void
GrowUnicodeBuffer(
Tcl_Obj *objPtr,
int needed)
{
- /* Pre-conditions:
- * objPtr->typePtr == &tclStringType
- * STRING_UALLOC(needed) > stringPtr->uallocated
- * needed < STRING_MAXCHARS
+ /*
+ * Pre-conditions:
+ * objPtr->typePtr == &tclStringType
+ * needed > stringPtr->maxChars
+ * needed < STRING_MAXCHARS
*/
+
String *ptr = NULL, *stringPtr = GET_STRING(objPtr);
int attempt;
- if (stringPtr->uallocated > 0) {
- /* Subsequent appends - apply the growth algorithm. */
+ if (stringPtr->maxChars > 0) {
+ /*
+ * Subsequent appends - apply the growth algorithm.
+ */
+
attempt = 2 * needed;
if (attempt >= 0 && attempt <= STRING_MAXCHARS) {
ptr = stringAttemptRealloc(stringPtr, attempt);
@@ -194,24 +261,28 @@ GrowUnicodeBuffer(
* 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_GROWTH_MIN_ALLOC/sizeof(Tcl_UniChar);
+ + 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. */
+ /*
+ * First allocation - just big enough; or last chance fallback.
+ */
+
attempt = needed;
ptr = stringRealloc(stringPtr, attempt);
}
stringPtr = ptr;
- stringPtr->uallocated = STRING_UALLOC(attempt);
+ stringPtr->maxChars = attempt;
SET_STRING(objPtr, stringPtr);
}
-
/*
*----------------------------------------------------------------------
@@ -261,7 +332,7 @@ Tcl_NewStringObj(
* negative, use bytes up to the first NUL
* byte. */
{
- register Tcl_Obj *objPtr;
+ Tcl_Obj *objPtr;
if (length < 0) {
length = (bytes? strlen(bytes) : 0);
@@ -314,7 +385,7 @@ Tcl_DbNewStringObj(
int line) /* Line number in the source file; used for
* debugging. */
{
- register Tcl_Obj *objPtr;
+ Tcl_Obj *objPtr;
if (length < 0) {
length = (bytes? strlen(bytes) : 0);
@@ -328,7 +399,7 @@ Tcl_Obj *
Tcl_DbNewStringObj(
const char *bytes, /* Points to the first of the length bytes
* used to initialize the new object. */
- register int length, /* The number of bytes to copy from "bytes"
+ 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. */
@@ -397,64 +468,50 @@ Tcl_GetCharLength(
* of. */
{
String *stringPtr;
-
- SetStringFromAny(NULL, objPtr);
- stringPtr = GET_STRING(objPtr);
+ int numChars;
/*
- * If numChars is unknown, then calculate the number of characaters while
- * populating the Unicode string.
+ * Optimize the case where we're really dealing with a bytearray object
+ * without string representation; we don't need to convert to a string to
+ * perform the get-length operation.
*/
- if (stringPtr->numChars == -1) {
- register int i = objPtr->length;
- register unsigned char *str = (unsigned char *) objPtr->bytes;
+ if (TclIsPureByteArray(objPtr)) {
+ int length;
- /*
- * This is a speed sensitive function, so run specially over the
- * string to count continuous ascii characters before resorting to the
- * Tcl_NumUtfChars call. This is a long form of:
- stringPtr->numChars = Tcl_NumUtfChars(objPtr->bytes,objPtr->length);
- *
- * TODO: Consider macro-izing this.
- */
+ (void) Tcl_GetByteArrayFromObj(objPtr, &length);
+ return length;
+ }
- while (i && (*str < 0xC0)) {
- i--;
- str++;
- }
- stringPtr->numChars = objPtr->length - i;
- if (i) {
- stringPtr->numChars += Tcl_NumUtfChars(objPtr->bytes
- + (objPtr->length - i), i);
- }
+ /*
+ * OK, need to work with the object as a string.
+ */
- if (stringPtr->numChars == objPtr->length) {
- /*
- * Since we've just calculated the number of chars, and all UTF
- * chars are 1-byte long, we don't need to store the unicode
- * string.
- */
+ SetStringFromAny(NULL, objPtr);
+ stringPtr = GET_STRING(objPtr);
+ numChars = stringPtr->numChars;
- stringPtr->hasUnicode = 0;
- } else {
- /*
- * Since we've just calucalated the number of chars, and not all
- * UTF chars are 1-byte long, go ahead and populate the unicode
- * string.
- */
+ /*
+ * If numChars is unknown, compute it.
+ */
- FillUnicodeRep(objPtr);
+ if (numChars == -1) {
+ TclNumUtfChars(numChars, objPtr->bytes, objPtr->length);
+ stringPtr->numChars = numChars;
+#if COMPAT
+ if (numChars < objPtr->length) {
/*
- * We need to fetch the pointer again because we have just
- * reallocated the structure to make room for the Unicode data.
+ * 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.
*/
- stringPtr = GET_STRING(objPtr);
+ FillUnicodeRep(objPtr);
}
+#endif
}
- return stringPtr->numChars;
+ return numChars;
}
/*
@@ -480,39 +537,42 @@ Tcl_GetUniChar(
* from. */
int index) /* Get the index'th Unicode character. */
{
- Tcl_UniChar unichar;
String *stringPtr;
- SetStringFromAny(NULL, objPtr);
- stringPtr = GET_STRING(objPtr);
+ /*
+ * Optimize the case where we're really dealing with a bytearray object
+ * without string representation; we don't need to convert to a string to
+ * perform the indexing operation.
+ */
- if (stringPtr->numChars == -1) {
- /*
- * We haven't yet calculated the length, so we don't have the Unicode
- * str. We need to know the number of chars before we can do indexing.
- */
+ if (TclIsPureByteArray(objPtr)) {
+ unsigned char *bytes = Tcl_GetByteArrayFromObj(objPtr, NULL);
- Tcl_GetCharLength(objPtr);
+ return (Tcl_UniChar) bytes[index];
+ }
- /*
- * We need to fetch the pointer again because we may have just
- * reallocated the structure.
- */
+ /*
+ * OK, need to work with the object as a string.
+ */
+
+ SetStringFromAny(NULL, objPtr);
+ stringPtr = GET_STRING(objPtr);
- stringPtr = GET_STRING(objPtr);
- }
if (stringPtr->hasUnicode == 0) {
/*
- * All of the characters in the Utf string are 1 byte chars, so we
- * don't store the unicode char. We get the Utf string and convert the
- * index'th byte to a Unicode character.
+ * If numChars is unknown, compute it.
*/
- unichar = (Tcl_UniChar) objPtr->bytes[index];
- } else {
- unichar = stringPtr->unicode[index];
+ 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);
}
- return unichar;
+ return stringPtr->unicode[index];
}
/*
@@ -539,30 +599,7 @@ Tcl_GetUnicode(
Tcl_Obj *objPtr) /* The object to find the unicode string
* for. */
{
- String *stringPtr;
-
- SetStringFromAny(NULL, objPtr);
- stringPtr = GET_STRING(objPtr);
-
- if ((stringPtr->numChars == -1) || (stringPtr->hasUnicode == 0)) {
- /*
- * We haven't yet calculated the length, or all of the characters in
- * the Utf string are 1 byte chars (so we didn't store the unicode
- * str). Since this function must return a unicode string, and one has
- * not yet been stored, force the Unicode to be calculated and stored
- * now.
- */
-
- FillUnicodeRep(objPtr);
-
- /*
- * We need to fetch the pointer again because we have just reallocated
- * the structure to make room for the Unicode data.
- */
-
- stringPtr = GET_STRING(objPtr);
- }
- return stringPtr->unicode;
+ return Tcl_GetUnicodeFromObj(objPtr, NULL);
}
/*
@@ -597,22 +634,8 @@ Tcl_GetUnicodeFromObj(
SetStringFromAny(NULL, objPtr);
stringPtr = GET_STRING(objPtr);
- if ((stringPtr->numChars == -1) || (stringPtr->hasUnicode == 0)) {
- /*
- * We haven't yet calculated the length, or all of the characters in
- * the Utf string are 1 byte chars (so we didn't store the unicode
- * str). Since this function must return a unicode string, and one has
- * not yet been stored, force the Unicode to be calculated and stored
- * now.
- */
-
+ if (stringPtr->hasUnicode == 0) {
FillUnicodeRep(objPtr);
-
- /*
- * We need to fetch the pointer again because we have just reallocated
- * the structure to make room for the Unicode data.
- */
-
stringPtr = GET_STRING(objPtr);
}
@@ -650,49 +673,50 @@ Tcl_GetRange(
Tcl_Obj *newObjPtr; /* The Tcl object to find the range of. */
String *stringPtr;
- SetStringFromAny(NULL, objPtr);
- stringPtr = GET_STRING(objPtr);
-
- if (stringPtr->numChars == -1) {
- /*
- * We haven't yet calculated the length, so we don't have the Unicode
- * str. We need to know the number of chars before we can do indexing.
- */
-
- Tcl_GetCharLength(objPtr);
+ /*
+ * Optimize the case where we're really dealing with a bytearray object
+ * without string representation; we don't need to convert to a string to
+ * perform the substring operation.
+ */
- /*
- * We need to fetch the pointer again because we may have just
- * reallocated the structure.
- */
+ if (TclIsPureByteArray(objPtr)) {
+ unsigned char *bytes = Tcl_GetByteArrayFromObj(objPtr, NULL);
- stringPtr = GET_STRING(objPtr);
+ return Tcl_NewByteArrayObj(bytes+first, last-first+1);
}
- if (objPtr->bytes && (stringPtr->numChars == objPtr->length)) {
- char *str = TclGetString(objPtr);
+ /*
+ * OK, need to work with the object as a string.
+ */
+ SetStringFromAny(NULL, objPtr);
+ stringPtr = GET_STRING(objPtr);
+
+ if (stringPtr->hasUnicode == 0) {
/*
- * All of the characters in the Utf string are 1 byte chars, so we
- * don't store the unicode char. Create a new string object containing
- * the specified range of chars.
+ * If numChars is unknown, compute it.
*/
- newObjPtr = Tcl_NewStringObj(&str[first], last-first+1);
+ if (stringPtr->numChars == -1) {
+ TclNumUtfChars(stringPtr->numChars, objPtr->bytes, objPtr->length);
+ }
+ if (stringPtr->numChars == objPtr->length) {
+ newObjPtr = Tcl_NewStringObj(objPtr->bytes + first, last-first+1);
- /*
- * Since we know the new string only has 1-byte chars, we can set it's
- * numChars field.
- */
+ /*
+ * Since we know the char length of the result, store it.
+ */
- SetStringFromAny(NULL, newObjPtr);
- stringPtr = GET_STRING(newObjPtr);
- stringPtr->numChars = last-first+1;
- } else {
- newObjPtr = Tcl_NewUnicodeObj(stringPtr->unicode + first,
- last-first+1);
+ SetStringFromAny(NULL, newObjPtr);
+ stringPtr = GET_STRING(newObjPtr);
+ stringPtr->numChars = newObjPtr->length;
+ return newObjPtr;
+ }
+ FillUnicodeRep(objPtr);
+ stringPtr = GET_STRING(objPtr);
}
- return newObjPtr;
+
+ return Tcl_NewUnicodeObj(stringPtr->unicode + first, last-first+1);
}
/*
@@ -718,10 +742,10 @@ Tcl_GetRange(
void
Tcl_SetStringObj(
- register Tcl_Obj *objPtr, /* Object whose internal rep to init. */
+ 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. */
- register int length) /* The number of bytes to copy from "bytes"
+ int length) /* The number of bytes to copy from "bytes"
* when initializing the object. If negative,
* use bytes up to the first NUL byte.*/
{
@@ -734,14 +758,13 @@ Tcl_SetStringObj(
*/
TclFreeIntRep(objPtr);
- objPtr->typePtr = NULL;
/*
* Free any old string rep, then set the string rep to a copy of the
* length bytes starting at "bytes".
*/
- Tcl_InvalidateStringRep(objPtr);
+ TclInvalidateStringRep(objPtr);
if (length < 0) {
length = (bytes? strlen(bytes) : 0);
}
@@ -773,9 +796,9 @@ Tcl_SetStringObj(
void
Tcl_SetObjLength(
- register Tcl_Obj *objPtr, /* Pointer to object. This object must not
+ Tcl_Obj *objPtr, /* Pointer to object. This object must not
* currently be shared. */
- register int length) /* Number of bytes desired for string
+ int length) /* Number of bytes desired for string
* representation of object, not including
* terminating null byte. */
{
@@ -783,60 +806,42 @@ Tcl_SetObjLength(
if (length < 0) {
/*
- * Setting to a negative length is nonsense. This is probably the
+ * 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");
}
- SetStringFromAny(NULL, objPtr);
- stringPtr = GET_STRING(objPtr);
+ if (objPtr->bytes && objPtr->length == length) {
+ return;
+ }
- /*
- * Check that we're not extending a pure unicode string.
- */
+ SetStringFromAny(NULL, objPtr);
+ stringPtr = GET_STRING(objPtr);
- if ((size_t)length > stringPtr->allocated &&
- (objPtr->bytes != NULL || stringPtr->hasUnicode == 0)) {
+ if (objPtr->bytes != NULL) {
/*
- * Not enough space in current string. Reallocate the string space and
- * free the old string.
+ * Change length of an existing string rep.
*/
-
- if (objPtr->bytes != tclEmptyStringRep) {
- objPtr->bytes = ckrealloc((char *) objPtr->bytes,
- (unsigned) (length + 1));
- } else {
- char *newBytes = ckalloc((unsigned) (length+1));
-
- if (objPtr->bytes != NULL && objPtr->length != 0) {
- memcpy(newBytes, objPtr->bytes, (size_t) objPtr->length);
- Tcl_InvalidateStringRep(objPtr);
+ if (length > stringPtr->allocated) {
+ /*
+ * Need to enlarge the buffer.
+ */
+ if (objPtr->bytes == tclEmptyStringRep) {
+ objPtr->bytes = ckalloc(length + 1);
+ } else {
+ objPtr->bytes = ckrealloc(objPtr->bytes, length + 1);
}
- objPtr->bytes = newBytes;
+ stringPtr->allocated = length;
}
- stringPtr->allocated = length;
- /*
- * Invalidate the unicode data.
- */
-
- stringPtr->hasUnicode = 0;
- }
-
- if (objPtr->bytes != NULL) {
objPtr->length = length;
- if (objPtr->bytes != tclEmptyStringRep) {
- /*
- * Ensure the string is NUL-terminated.
- */
-
- objPtr->bytes[length] = 0;
- }
+ objPtr->bytes[length] = 0;
/*
* Invalidate the unicode data.
@@ -849,24 +854,25 @@ Tcl_SetObjLength(
* Changing length of pure unicode string.
*/
- size_t uallocated = STRING_UALLOC(length);
-
stringCheckLimits(length);
- if (uallocated > stringPtr->uallocated) {
+ if (length > stringPtr->maxChars) {
stringPtr = stringRealloc(stringPtr, length);
SET_STRING(objPtr, stringPtr);
- stringPtr->uallocated = uallocated;
+ stringPtr->maxChars = length;
}
- stringPtr->numChars = length;
- stringPtr->hasUnicode = (length > 0);
/*
- * Ensure the string is NUL-terminated.
+ * Mark the new end of the unicode string
*/
+ stringPtr->numChars = length;
stringPtr->unicode[length] = 0;
- stringPtr->allocated = 0;
- objPtr->length = 0;
+ stringPtr->hasUnicode = 1;
+
+ /*
+ * Can only get here when objPtr->bytes == NULL. No need to invalidate
+ * the string rep.
+ */
}
}
@@ -895,9 +901,9 @@ Tcl_SetObjLength(
int
Tcl_AttemptSetObjLength(
- register Tcl_Obj *objPtr, /* Pointer to object. This object must not
+ Tcl_Obj *objPtr, /* Pointer to object. This object must not
* currently be shared. */
- register int length) /* Number of bytes desired for string
+ int length) /* Number of bytes desired for string
* representation of object, not including
* terminating null byte. */
{
@@ -905,66 +911,47 @@ Tcl_AttemptSetObjLength(
if (length < 0) {
/*
- * Setting to a negative length is nonsense. This is probably the
+ * 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");
}
- SetStringFromAny(NULL, objPtr);
+ if (objPtr->bytes && objPtr->length == length) {
+ return 1;
+ }
+ SetStringFromAny(NULL, objPtr);
stringPtr = GET_STRING(objPtr);
- /*
- * Check that we're not extending a pure unicode string.
- */
-
- if (length > (int) stringPtr->allocated &&
- (objPtr->bytes != NULL || stringPtr->hasUnicode == 0)) {
- char *newBytes;
-
+ if (objPtr->bytes != NULL) {
/*
- * Not enough space in current string. Reallocate the string space and
- * free the old string.
+ * Change length of an existing string rep.
*/
+ if (length > stringPtr->allocated) {
+ /*
+ * Need to enlarge the buffer.
+ */
- if (objPtr->bytes != tclEmptyStringRep) {
- newBytes = attemptckrealloc(objPtr->bytes,
- (unsigned)(length + 1));
- if (newBytes == NULL) {
- return 0;
+ char *newBytes;
+
+ if (objPtr->bytes == tclEmptyStringRep) {
+ newBytes = attemptckalloc(length + 1);
+ } else {
+ newBytes = attemptckrealloc(objPtr->bytes, length + 1);
}
- } else {
- newBytes = attemptckalloc((unsigned) (length + 1));
if (newBytes == NULL) {
return 0;
}
- if (objPtr->bytes != NULL && objPtr->length != 0) {
- memcpy(newBytes, objPtr->bytes, (size_t) objPtr->length);
- Tcl_InvalidateStringRep(objPtr);
- }
+ objPtr->bytes = newBytes;
+ stringPtr->allocated = length;
}
- objPtr->bytes = newBytes;
- stringPtr->allocated = length;
-
- /*
- * Invalidate the unicode data.
- */
- stringPtr->hasUnicode = 0;
- }
-
- if (objPtr->bytes != NULL) {
objPtr->length = length;
- if (objPtr->bytes != tclEmptyStringRep) {
- /*
- * Ensure the string is NULL-terminated.
- */
-
- objPtr->bytes[length] = 0;
- }
+ objPtr->bytes[length] = 0;
/*
* Invalidate the unicode data.
@@ -977,29 +964,30 @@ Tcl_AttemptSetObjLength(
* Changing length of pure unicode string.
*/
- size_t uallocated = STRING_UALLOC(length);
if (length > STRING_MAXCHARS) {
return 0;
}
-
- if (uallocated > stringPtr->uallocated) {
+ if (length > stringPtr->maxChars) {
stringPtr = stringAttemptRealloc(stringPtr, length);
if (stringPtr == NULL) {
return 0;
}
SET_STRING(objPtr, stringPtr);
- stringPtr->uallocated = uallocated;
+ stringPtr->maxChars = length;
}
- stringPtr->numChars = length;
- stringPtr->hasUnicode = (length > 0);
/*
- * Ensure the string is NUL-terminated.
+ * Mark the new end of the unicode string.
*/
stringPtr->unicode[length] = 0;
- stringPtr->allocated = 0;
- objPtr->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;
}
@@ -1059,7 +1047,6 @@ SetUnicodeObj(
* string. */
{
String *stringPtr;
- size_t uallocated;
if (numChars < 0) {
numChars = UnicodeLength(unicode);
@@ -1070,19 +1057,18 @@ SetUnicodeObj(
*/
stringCheckLimits(numChars);
- uallocated = STRING_UALLOC(numChars);
- stringPtr = (String *) ckalloc(STRING_SIZE(uallocated));
+ stringPtr = stringAlloc(numChars);
+ SET_STRING(objPtr, stringPtr);
+ objPtr->typePtr = &tclStringType;
- stringPtr->numChars = numChars;
- stringPtr->uallocated = uallocated;
- stringPtr->hasUnicode = (numChars > 0);
- stringPtr->allocated = 0;
- memcpy(stringPtr->unicode, unicode, uallocated);
+ stringPtr->maxChars = numChars;
+ memcpy(stringPtr->unicode, unicode, numChars * sizeof(Tcl_UniChar));
stringPtr->unicode[numChars] = 0;
+ stringPtr->numChars = numChars;
+ stringPtr->hasUnicode = 1;
- Tcl_InvalidateStringRep(objPtr);
- objPtr->typePtr = &tclStringType;
- SET_STRING(objPtr, stringPtr);
+ TclInvalidateStringRep(objPtr);
+ stringPtr->allocated = 0;
}
/*
@@ -1105,13 +1091,13 @@ SetUnicodeObj(
void
Tcl_AppendLimitedToObj(
- register Tcl_Obj *objPtr, /* Points to the object to append to. */
+ Tcl_Obj *objPtr, /* Points to the object to append to. */
const char *bytes, /* Points to the bytes to append to the
* object. */
- register int length, /* The number of bytes available to be
+ int length, /* The number of bytes available to be
* appended from "bytes". If < 0, then all
* bytes up to a NUL byte are available. */
- register int limit, /* The maximum number of bytes to append to
+ 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
@@ -1124,8 +1110,6 @@ Tcl_AppendLimitedToObj(
Tcl_Panic("%s called with shared object", "Tcl_AppendLimitedToObj");
}
- SetStringFromAny(NULL, objPtr);
-
if (length < 0) {
length = (bytes ? strlen(bytes) : 0);
}
@@ -1148,8 +1132,10 @@ Tcl_AppendLimitedToObj(
* objPtr's string rep.
*/
+ SetStringFromAny(NULL, objPtr);
stringPtr = GET_STRING(objPtr);
- if (stringPtr->hasUnicode != 0) {
+
+ if (stringPtr->hasUnicode && stringPtr->numChars > 0) {
AppendUtfToUnicodeRep(objPtr, bytes, toCopy);
} else {
AppendUtfToUtfRep(objPtr, bytes, toCopy);
@@ -1160,10 +1146,10 @@ Tcl_AppendLimitedToObj(
}
stringPtr = GET_STRING(objPtr);
- if (stringPtr->hasUnicode != 0) {
- AppendUtfToUnicodeRep(objPtr, ellipsis, -1);
+ if (stringPtr->hasUnicode && stringPtr->numChars > 0) {
+ AppendUtfToUnicodeRep(objPtr, ellipsis, strlen(ellipsis));
} else {
- AppendUtfToUtfRep(objPtr, ellipsis, -1);
+ AppendUtfToUtfRep(objPtr, ellipsis, strlen(ellipsis));
}
}
@@ -1186,10 +1172,10 @@ Tcl_AppendLimitedToObj(
void
Tcl_AppendToObj(
- register Tcl_Obj *objPtr, /* Points to the object to append to. */
+ Tcl_Obj *objPtr, /* Points to the object to append to. */
const char *bytes, /* Points to the bytes to append to the
* object. */
- register int length) /* The number of bytes to append from "bytes".
+ int length) /* The number of bytes to append from "bytes".
* If < 0, then append all bytes up to NUL
* byte. */
{
@@ -1215,7 +1201,7 @@ Tcl_AppendToObj(
void
Tcl_AppendUnicodeToObj(
- register Tcl_Obj *objPtr, /* Points to the object to append to. */
+ 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". */
@@ -1239,7 +1225,11 @@ Tcl_AppendUnicodeToObj(
* objPtr's string rep.
*/
- if (stringPtr->hasUnicode != 0) {
+ if (stringPtr->hasUnicode
+#if COMPAT
+ && stringPtr->numChars > 0
+#endif
+ ) {
AppendUnicodeToUnicodeRep(objPtr, unicode, length);
} else {
AppendUnicodeToUtfRep(objPtr, unicode, length);
@@ -1270,35 +1260,73 @@ Tcl_AppendObjToObj(
Tcl_Obj *appendObjPtr) /* Object to append. */
{
String *stringPtr;
- int length, numChars, allOneByteChars;
- char *bytes;
+ 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)) {
+ unsigned char *bytesSrc;
+ int lengthSrc, lengthTotal;
+
+ /*
+ * We do not assume that objPtr and appendObjPtr must be distinct!
+ * This makes this code a bit more complex than it otherwise would be,
+ * but in turn makes it much safer.
+ */
+
+ (void) Tcl_GetByteArrayFromObj(objPtr, &length);
+ (void) Tcl_GetByteArrayFromObj(appendObjPtr, &lengthSrc);
+ lengthTotal = length + lengthSrc;
+ if (((length > lengthSrc) ? length : lengthSrc) > lengthTotal) {
+ Tcl_Panic("max size for a Tcl value (%d bytes) exceeded", INT_MAX);
+ }
+ bytesSrc = Tcl_GetByteArrayFromObj(appendObjPtr, NULL);
+ TclAppendBytesToByteArray(objPtr, bytesSrc, 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.
*/
- stringPtr = GET_STRING(objPtr);
- if (stringPtr->hasUnicode != 0) {
+ 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) {
- stringPtr = GET_STRING(appendObjPtr);
- if ((stringPtr->numChars == -1) || (stringPtr->hasUnicode == 0)) {
- /*
- * If appendObjPtr is a string obj with no valid Unicode rep,
- * then fill its unicode rep.
- */
+ Tcl_UniChar *unicode =
+ Tcl_GetUnicodeFromObj(appendObjPtr, &numChars);
- FillUnicodeRep(appendObjPtr);
- stringPtr = GET_STRING(appendObjPtr);
- }
- AppendUnicodeToUnicodeRep(objPtr, stringPtr->unicode,
- stringPtr->numChars);
+ AppendUnicodeToUnicodeRep(objPtr, unicode, numChars);
} else {
bytes = TclGetStringFromObj(appendObjPtr, &length);
AppendUtfToUnicodeRep(objPtr, bytes, length);
@@ -1314,21 +1342,20 @@ Tcl_AppendObjToObj(
bytes = TclGetStringFromObj(appendObjPtr, &length);
- allOneByteChars = 0;
numChars = stringPtr->numChars;
if ((numChars >= 0) && (appendObjPtr->typePtr == &tclStringType)) {
- stringPtr = GET_STRING(appendObjPtr);
- if ((stringPtr->numChars >= 0) && (stringPtr->numChars == length)) {
- numChars += stringPtr->numChars;
- allOneByteChars = 1;
- }
+ String *appendStringPtr = GET_STRING(appendObjPtr);
+ appendNumChars = appendStringPtr->numChars;
}
AppendUtfToUtfRep(objPtr, bytes, length);
- if (allOneByteChars) {
- stringPtr = GET_STRING(objPtr);
- stringPtr->numChars = numChars;
+ if (numChars >= 0 && appendNumChars >= 0
+#if COMPAT
+ && appendNumChars == length
+#endif
+ ) {
+ stringPtr->numChars = numChars + appendNumChars;
}
}
@@ -1379,22 +1406,27 @@ AppendUnicodeToUnicodeRep(
numChars = stringPtr->numChars + appendNumChars;
stringCheckLimits(numChars);
- if (STRING_UALLOC(numChars) > stringPtr->uallocated) {
+ 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.
+ * stringPtr->unicode array. Force it to follow any relocations due to
+ * the reallocs below.
*/
- int offset = -1;
- if (unicode >= stringPtr->unicode && unicode <= stringPtr->unicode
- + stringPtr->uallocated / sizeof(Tcl_UniChar)) {
+
+ if (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. */
+ /*
+ * Relocate unicode if needed; see above.
+ */
+
if (offset >= 0) {
unicode = stringPtr->unicode + offset;
}
@@ -1405,13 +1437,13 @@ AppendUnicodeToUnicodeRep(
* trailing null.
*/
- memcpy(stringPtr->unicode + stringPtr->numChars, unicode,
+ memmove(stringPtr->unicode + stringPtr->numChars, unicode,
appendNumChars * sizeof(Tcl_UniChar));
stringPtr->unicode[numChars] = 0;
stringPtr->numChars = numChars;
stringPtr->allocated = 0;
- Tcl_InvalidateStringRep(objPtr);
+ TclInvalidateStringRep(objPtr);
}
/*
@@ -1437,20 +1469,21 @@ AppendUnicodeToUtfRep(
const Tcl_UniChar *unicode, /* String to convert to UTF. */
int numChars) /* Number of chars of "unicode" to convert. */
{
- Tcl_DString dsPtr;
- const char *bytes;
+ String *stringPtr = GET_STRING(objPtr);
- if (numChars < 0) {
- numChars = UnicodeLength(unicode);
- }
- if (numChars == 0) {
- return;
+ numChars = ExtendStringRepWithUnicode(objPtr, unicode, numChars);
+
+ if (stringPtr->numChars != -1) {
+ stringPtr->numChars += numChars;
}
- Tcl_DStringInit(&dsPtr);
- bytes = Tcl_UniCharToUtfDString(unicode, numChars, &dsPtr);
- AppendUtfToUtfRep(objPtr, bytes, Tcl_DStringLength(&dsPtr));
- Tcl_DStringFree(&dsPtr);
+#if COMPAT
+ /*
+ * Invalidate the unicode rep.
+ */
+
+ stringPtr->hasUnicode = 0;
+#endif
}
/*
@@ -1460,7 +1493,7 @@ AppendUnicodeToUtfRep(
*
* 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.
+ * valid Unicode rep. numBytes must be non-negative.
*
* Results:
* None.
@@ -1477,22 +1510,16 @@ AppendUtfToUnicodeRep(
const char *bytes, /* String to convert to Unicode. */
int numBytes) /* Number of bytes of "bytes" to convert. */
{
- Tcl_DString dsPtr;
- int numChars;
- Tcl_UniChar *unicode;
+ String *stringPtr;
- if (numBytes < 0) {
- numBytes = (bytes ? strlen(bytes) : 0);
- }
if (numBytes == 0) {
return;
}
- Tcl_DStringInit(&dsPtr);
- numChars = Tcl_NumUtfChars(bytes, numBytes);
- unicode = (Tcl_UniChar *)Tcl_UtfToUniCharDString(bytes, numBytes, &dsPtr);
- AppendUnicodeToUnicodeRep(objPtr, unicode, numChars);
- Tcl_DStringFree(&dsPtr);
+ ExtendUnicodeRepWithString(objPtr, bytes, numBytes, -1);
+ TclInvalidateStringRep(objPtr);
+ stringPtr = GET_STRING(objPtr);
+ stringPtr->allocated = 0;
}
/*
@@ -1502,6 +1529,7 @@ AppendUtfToUnicodeRep(
*
* 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.
@@ -1521,9 +1549,6 @@ AppendUtfToUtfRep(
String *stringPtr;
int newLength, oldLength;
- if (numBytes < 0) {
- numBytes = (bytes ? strlen(bytes) : 0);
- }
if (numBytes == 0) {
return;
}
@@ -1533,6 +1558,9 @@ AppendUtfToUtfRep(
* trailing null.
*/
+ if (objPtr->bytes == NULL) {
+ objPtr->length = 0;
+ }
oldLength = objPtr->length;
newLength = numBytes + oldLength;
if (newLength < 0) {
@@ -1540,40 +1568,32 @@ AppendUtfToUtfRep(
}
stringPtr = GET_STRING(objPtr);
- if (newLength > (int) stringPtr->allocated) {
+ 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.
+ * stringPtr->unicode array. Force it to follow any relocations due to
+ * the reallocs below.
*/
- int offset = -1;
+
if (bytes >= objPtr->bytes
&& bytes <= objPtr->bytes + objPtr->length) {
offset = bytes - objPtr->bytes;
}
/*
- * There isn't currently enough space in the string representation so
- * allocate additional space. First, try to double the length
- * required. If that fails, try a more modest allocation. See the "TCL
- * STRING GROWTH ALGORITHM" comment at the top of this file for an
- * explanation of this growth algorithm.
+ * TODO: consider passing flag=1: no overalloc on first append. This
+ * would make test stringObj-8.1 fail.
*/
- if (Tcl_AttemptSetObjLength(objPtr, 2 * newLength) == 0) {
- /*
- * Take care computing the amount of modest growth to avoid
- * overflow into invalid argument values for Tcl_SetObjLength.
- */
- unsigned int limit = INT_MAX - newLength;
- unsigned int extra = numBytes + TCL_GROWTH_MIN_ALLOC;
- int growth = (int) ((extra > limit) ? limit : extra);
-
- Tcl_SetObjLength(objPtr, newLength + growth);
- }
+ GrowStringBuffer(objPtr, newLength, 0);
+
+ /*
+ * Relocate bytes if needed; see above.
+ */
- /* Relocate bytes if needed; see above. */
- if (offset >=0) {
+ if (offset >= 0) {
bytes = objPtr->bytes + offset;
}
}
@@ -1585,7 +1605,7 @@ AppendUtfToUtfRep(
stringPtr->numChars = -1;
stringPtr->hasUnicode = 0;
- memcpy(objPtr->bytes + oldLength, bytes, (size_t) numBytes);
+ memmove(objPtr->bytes + oldLength, bytes, numBytes);
objPtr->bytes[newLength] = 0;
objPtr->length = newLength;
}
@@ -1613,130 +1633,18 @@ Tcl_AppendStringsToObjVA(
Tcl_Obj *objPtr, /* Points to the object to append to. */
va_list argList) /* Variable argument list. */
{
-#define STATIC_LIST_SIZE 16
- String *stringPtr;
- int newLength, oldLength, attemptLength;
- register char *string, *dst;
- char *static_list[STATIC_LIST_SIZE];
- char **args = static_list;
- int nargs_space = STATIC_LIST_SIZE;
- int nargs, i;
-
if (Tcl_IsShared(objPtr)) {
Tcl_Panic("%s called with shared object", "Tcl_AppendStringsToObj");
}
- SetStringFromAny(NULL, objPtr);
-
- /*
- * Force the existence of a string rep. so we avoid crashes operating
- * on a pure unicode value. [Bug 2597185]
- */
-
- (void) Tcl_GetStringFromObj(objPtr, &oldLength);
-
- /*
- * Figure out how much space is needed for all the strings, and expand the
- * string representation if it isn't big enough. If no bytes would be
- * appended, just return. Note that on some platforms (notably OS/390) the
- * argList is an array so we need to use memcpy.
- */
-
- nargs = 0;
- newLength = 0;
while (1) {
- string = va_arg(argList, char *);
- if (string == NULL) {
- break;
- }
- if (nargs >= nargs_space) {
- /*
- * Expand the args buffer.
- */
+ const char *bytes = va_arg(argList, char *);
- nargs_space += STATIC_LIST_SIZE;
- if (args == static_list) {
- args = (void *) ckalloc(nargs_space * sizeof(char *));
- for (i = 0; i < nargs; ++i) {
- args[i] = static_list[i];
- }
- } else {
- args = (void *) ckrealloc((void *) args,
- nargs_space * sizeof(char *));
- }
- }
- newLength += strlen(string);
- args[nargs++] = string;
- }
- if (newLength == 0) {
- goto done;
- }
-
- stringPtr = GET_STRING(objPtr);
- if (oldLength + newLength > (int) stringPtr->allocated) {
- /*
- * There isn't currently enough space in the string representation, so
- * allocate additional space. If the current string representation
- * isn't empty (i.e. it looks like we're doing a series of appends)
- * then try to allocate extra space to accomodate future growth: first
- * try to double the required memory; if that fails, try a more modest
- * allocation. See the "TCL STRING GROWTH ALGORITHM" comment at the
- * top of this file for an explanation of this growth algorithm.
- * Otherwise, if the current string representation is empty, exactly
- * enough memory is allocated.
- */
-
- if (oldLength == 0) {
- Tcl_SetObjLength(objPtr, newLength);
- } else {
- attemptLength = 2 * (oldLength + newLength);
- if (Tcl_AttemptSetObjLength(objPtr, attemptLength) == 0) {
- attemptLength = oldLength + (2 * newLength) +
- TCL_GROWTH_MIN_ALLOC;
- Tcl_SetObjLength(objPtr, attemptLength);
- }
- }
- }
-
- /*
- * Make a second pass through the arguments, appending all the strings to
- * the object.
- */
-
- dst = objPtr->bytes + oldLength;
- for (i = 0; i < nargs; ++i) {
- string = args[i];
- if (string == NULL) {
+ if (bytes == NULL) {
break;
}
- while (*string != 0) {
- *dst = *string;
- dst++;
- string++;
- }
- }
-
- /*
- * Add a null byte to terminate the string. However, be careful: it's
- * possible that the object is totally empty (if it was empty originally
- * and there was nothing to append). In this case dst is NULL; just leave
- * everything alone.
- */
-
- if (dst != NULL) {
- *dst = 0;
- }
- objPtr->length = oldLength + newLength;
-
- done:
- /*
- * If we had to allocate a buffer from the heap, free it now.
- */
-
- if (args != static_list) {
- ckfree((void *) args);
+ Tcl_AppendToObj(objPtr, bytes, -1);
}
-#undef STATIC_LIST_SIZE
}
/*
@@ -1797,12 +1705,12 @@ Tcl_AppendFormatToObj(
int objc,
Tcl_Obj *const objv[])
{
- const char *span = format, *msg;
+ const char *span = format, *msg, *errCode;
int numBytes = 0, objIndex = 0, gotXpg = 0, gotSequential = 0;
int originalLength, limit;
static const char *mixedXPG =
"cannot mix \"%\" and \"%n$\" conversion specifiers";
- static const char *badIndex[2] = {
+ static const char *const badIndex[2] = {
"not enough arguments for all format specifiers",
"\"%n$\" argument index out of range"
};
@@ -1835,6 +1743,7 @@ Tcl_AppendFormatToObj(
if (numBytes) {
if (numBytes > limit) {
msg = overflow;
+ errCode = "OVERFLOW";
goto errorMsg;
}
Tcl_AppendToObj(appendObj, span, numBytes);
@@ -1863,6 +1772,7 @@ Tcl_AppendFormatToObj(
newXpg = 0;
if (isdigit(UCHAR(ch))) {
int position = strtoul(format, &end, 10);
+
if (*end == '$') {
newXpg = 1;
objIndex = position - 1;
@@ -1873,18 +1783,21 @@ Tcl_AppendFormatToObj(
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;
}
@@ -1932,6 +1845,7 @@ Tcl_AppendFormatToObj(
} else if (ch == '*') {
if (objIndex >= objc - 1) {
msg = badIndex[gotXpg];
+ errCode = gotXpg ? "INDEXRANGE" : "FIELDVARMISMATCH";
goto errorMsg;
}
if (TclGetIntFromObj(interp, objv[objIndex], &width) != TCL_OK) {
@@ -1947,6 +1861,7 @@ Tcl_AppendFormatToObj(
}
if (width > limit) {
msg = overflow;
+ errCode = "OVERFLOW";
goto errorMsg;
}
@@ -1967,6 +1882,7 @@ Tcl_AppendFormatToObj(
} else if (ch == '*') {
if (objIndex >= objc - 1) {
msg = badIndex[gotXpg];
+ errCode = gotXpg ? "INDEXRANGE" : "FIELDVARMISMATCH";
goto errorMsg;
}
if (TclGetIntFromObj(interp, objv[objIndex], &precision)
@@ -2002,8 +1918,8 @@ Tcl_AppendFormatToObj(
useBig = 1;
format += step;
step = Tcl_UtfToUniChar(format, &ch);
- } else {
#ifndef TCL_WIDE_INT_IS_LONG
+ } else {
useWide = 1;
#endif
}
@@ -2024,6 +1940,7 @@ Tcl_AppendFormatToObj(
switch (ch) {
case '\0':
msg = "format string ended in middle of field specifier";
+ errCode = "INCOMPLETE";
goto errorMsg;
case 's':
if (gotPrecision) {
@@ -2053,13 +1970,15 @@ Tcl_AppendFormatToObj(
case 'u':
if (useBig) {
msg = "unsigned bignum format is invalid";
+ errCode = "BADUNSIGNED";
goto errorMsg;
}
case 'd':
case 'o':
case 'x':
- case 'X': {
- short int s = 0; /* Silence compiler warning; only defined and
+ case 'X':
+ case 'b': {
+ short s = 0; /* Silence compiler warning; only defined and
* used when useShort is true. */
long l;
Tcl_WideInt w;
@@ -2084,7 +2003,7 @@ Tcl_AppendFormatToObj(
Tcl_GetWideIntFromObj(NULL, objPtr, &w);
Tcl_DecrRefCount(objPtr);
}
- isNegative = (w < (Tcl_WideInt)0);
+ isNegative = (w < (Tcl_WideInt) 0);
} else if (TclGetLongFromObj(NULL, segment, &l) != TCL_OK) {
if (Tcl_GetWideIntFromObj(NULL, segment, &w) != TCL_OK) {
Tcl_Obj *objPtr;
@@ -2101,16 +2020,16 @@ Tcl_AppendFormatToObj(
l = Tcl_WideAsLong(w);
}
if (useShort) {
- s = (short int) l;
- isNegative = (s < (short int)0);
+ s = (short) l;
+ isNegative = (s < (short) 0);
} else {
- isNegative = (l < (long)0);
+ isNegative = (l < (long) 0);
}
} else if (useShort) {
- s = (short int) l;
- isNegative = (s < (short int)0);
+ s = (short) l;
+ isNegative = (s < (short) 0);
} else {
- isNegative = (l < (long)0);
+ isNegative = (l < (long) 0);
}
segment = Tcl_NewObj();
@@ -2118,8 +2037,9 @@ Tcl_AppendFormatToObj(
segmentLimit = INT_MAX;
Tcl_IncrRefCount(segment);
- if ((isNegative || gotPlus || gotSpace) && (useBig || (ch == 'd'))) {
- Tcl_AppendToObj(segment, (isNegative ? "-" : gotPlus ? "+" : " "), 1);
+ if ((isNegative || gotPlus || gotSpace) && (useBig || ch=='d')) {
+ Tcl_AppendToObj(segment,
+ (isNegative ? "-" : gotPlus ? "+" : " "), 1);
segmentLimit -= 1;
}
@@ -2135,6 +2055,10 @@ Tcl_AppendFormatToObj(
Tcl_AppendToObj(segment, "0x", 2);
segmentLimit -= 2;
break;
+ case 'b':
+ Tcl_AppendToObj(segment, "0b", 2);
+ segmentLimit -= 2;
+ break;
}
}
@@ -2145,7 +2069,7 @@ Tcl_AppendFormatToObj(
const char *bytes;
if (useShort) {
- pure = Tcl_NewIntObj((int)(s));
+ pure = Tcl_NewIntObj((int) s);
} else if (useWide) {
pure = Tcl_NewWideIntObj(w);
} else if (useBig) {
@@ -2174,7 +2098,7 @@ Tcl_AppendFormatToObj(
if (gotPrecision) {
if (length < precision) {
- segmentLimit -= (precision - length);
+ segmentLimit -= precision - length;
}
while (length < precision) {
Tcl_AppendToObj(segment, "0", 1);
@@ -2185,7 +2109,7 @@ Tcl_AppendFormatToObj(
if (gotZero) {
length += Tcl_GetCharLength(segment);
if (length < width) {
- segmentLimit -= (width - length);
+ segmentLimit -= width - length;
}
while (length < width) {
Tcl_AppendToObj(segment, "0", 1);
@@ -2194,6 +2118,7 @@ Tcl_AppendFormatToObj(
}
if (toAppend > segmentLimit) {
msg = overflow;
+ errCode = "OVERFLOW";
goto errorMsg;
}
Tcl_AppendToObj(segment, bytes, toAppend);
@@ -2204,23 +2129,25 @@ Tcl_AppendFormatToObj(
case 'u':
case 'o':
case 'x':
- case 'X': {
- Tcl_WideUInt bits = (Tcl_WideUInt)0;
- Tcl_WideInt numDigits = (Tcl_WideInt)0;
- int length, numBits = 4, base = 16;
- int index = 0, shift = 0;
+ 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;
- }
- if (ch == 'o') {
+ } else if (ch == 'o') {
base = 8;
numBits = 3;
+ } else if (ch == 'b') {
+ base = 2;
+ numBits = 1;
}
if (useShort) {
- unsigned short int us = (unsigned short int) s;
+ unsigned short us = (unsigned short) s;
bits = (Tcl_WideUInt) us;
while (us) {
@@ -2240,17 +2167,18 @@ Tcl_AppendFormatToObj(
mp_digit mask = (~(mp_digit)0) << (DIGIT_BIT-leftover);
numDigits = 1 +
- (((Tcl_WideInt)big.used * DIGIT_BIT) / numBits);
+ (((Tcl_WideInt) big.used * 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 int ul = (unsigned long int) l;
+ unsigned long ul = (unsigned long) l;
bits = (Tcl_WideUInt) ul;
while (ul) {
@@ -2267,16 +2195,16 @@ Tcl_AppendFormatToObj(
numDigits = 1;
}
pure = Tcl_NewObj();
- Tcl_SetObjLength(pure, (int)numDigits);
+ Tcl_SetObjLength(pure, (int) numDigits);
bytes = TclGetString(pure);
- toAppend = length = (int)numDigits;
+ toAppend = length = (int) numDigits;
while (numDigits--) {
int digitOffset;
if (useBig && big.used) {
if (index < big.used && (size_t) shift <
CHAR_BIT*sizeof(Tcl_WideUInt) - DIGIT_BIT) {
- bits |= (((Tcl_WideUInt)big.dp[index++]) <<shift);
+ bits |= ((Tcl_WideUInt) big.dp[index++]) << shift;
shift += DIGIT_BIT;
}
shift -= numBits;
@@ -2294,7 +2222,7 @@ Tcl_AppendFormatToObj(
}
if (gotPrecision) {
if (length < precision) {
- segmentLimit -= (precision - length);
+ segmentLimit -= precision - length;
}
while (length < precision) {
Tcl_AppendToObj(segment, "0", 1);
@@ -2305,7 +2233,7 @@ Tcl_AppendFormatToObj(
if (gotZero) {
length += Tcl_GetCharLength(segment);
if (length < width) {
- segmentLimit -= (width - length);
+ segmentLimit -= width - length;
}
while (length < width) {
Tcl_AppendToObj(segment, "0", 1);
@@ -2314,6 +2242,7 @@ Tcl_AppendFormatToObj(
}
if (toAppend > segmentLimit) {
msg = overflow;
+ errCode = "OVERFLOW";
goto errorMsg;
}
Tcl_AppendObjToObj(segment, pure);
@@ -2360,13 +2289,14 @@ Tcl_AppendFormatToObj(
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;
+ msg = overflow;
+ errCode = "OVERFLOW";
goto errorMsg;
}
length += precision;
@@ -2383,11 +2313,13 @@ Tcl_AppendFormatToObj(
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;
@@ -2396,6 +2328,7 @@ Tcl_AppendFormatToObj(
if (interp != NULL) {
Tcl_SetObjResult(interp,
Tcl_ObjPrintf("bad field specifier \"%c\"", ch));
+ Tcl_SetErrorCode(interp, "TCL", "FORMAT", "BADTYPE", NULL);
}
goto error;
}
@@ -2408,18 +2341,16 @@ Tcl_AppendFormatToObj(
}
}
- if (width > 0) {
- if (numChars < 0) {
- numChars = Tcl_GetCharLength(segment);
+ if (width>0 && numChars<0) {
+ numChars = Tcl_GetCharLength(segment);
+ }
+ if (!gotMinus && width>0) {
+ if (numChars < width) {
+ limit -= width - numChars;
}
- if (!gotMinus) {
- if (numChars < width) {
- limit -= (width - numChars);
- }
- while (numChars < width) {
- Tcl_AppendToObj(appendObj, (gotZero ? "0" : " "), 1);
- numChars++;
- }
+ while (numChars < width) {
+ Tcl_AppendToObj(appendObj, (gotZero ? "0" : " "), 1);
+ numChars++;
}
}
@@ -2429,6 +2360,7 @@ Tcl_AppendFormatToObj(
Tcl_DecrRefCount(segment);
}
msg = overflow;
+ errCode = "OVERFLOW";
goto errorMsg;
}
Tcl_AppendObjToObj(appendObj, segment);
@@ -2438,7 +2370,7 @@ Tcl_AppendFormatToObj(
}
if (width > 0) {
if (numChars < width) {
- limit -= (width - numChars);
+ limit -= width-numChars;
}
while (numChars < width) {
Tcl_AppendToObj(appendObj, (gotZero ? "0" : " "), 1);
@@ -2451,6 +2383,7 @@ Tcl_AppendFormatToObj(
if (numBytes) {
if (numBytes > limit) {
msg = overflow;
+ errCode = "OVERFLOW";
goto errorMsg;
}
Tcl_AppendToObj(appendObj, span, numBytes);
@@ -2463,6 +2396,7 @@ Tcl_AppendFormatToObj(
errorMsg:
if (interp != NULL) {
Tcl_SetObjResult(interp, Tcl_NewStringObj(msg, -1));
+ Tcl_SetErrorCode(interp, "TCL", "FORMAT", errCode, NULL);
}
error:
Tcl_SetObjLength(appendObj, originalLength);
@@ -2478,7 +2412,7 @@ Tcl_AppendFormatToObj(
* A refcount zero Tcl_Obj.
*
* Side effects:
- * None.
+ * None.
*
*---------------------------------------------------------------------------
*/
@@ -2492,6 +2426,7 @@ Tcl_Format(
{
int result;
Tcl_Obj *objPtr = Tcl_NewObj();
+
result = Tcl_AppendFormatToObj(interp, objPtr, format, objc, objv);
if (result != TCL_OK) {
Tcl_DecrRefCount(objPtr);
@@ -2521,7 +2456,6 @@ AppendPrintfToObjVA(
int code, objc;
Tcl_Obj **objv, *list = Tcl_NewObj();
const char *p;
- char *end;
p = format;
Tcl_IncrRefCount(list);
@@ -2538,7 +2472,6 @@ AppendPrintfToObjVA(
}
do {
switch (*p) {
-
case '\0':
seekingConversion = 0;
break;
@@ -2591,11 +2524,11 @@ AppendPrintfToObjVA(
case -1:
case 0:
Tcl_ListObjAppendElement(NULL, list, Tcl_NewLongObj(
- (long int)va_arg(argList, int)));
+ (long) va_arg(argList, int)));
break;
case 1:
Tcl_ListObjAppendElement(NULL, list, Tcl_NewLongObj(
- va_arg(argList, long int)));
+ va_arg(argList, long)));
break;
}
break;
@@ -2609,15 +2542,18 @@ AppendPrintfToObjVA(
seekingConversion = 0;
break;
case '*':
- lastNum = (int)va_arg(argList, int);
+ 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':
+ 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++;
@@ -2653,7 +2589,7 @@ AppendPrintfToObjVA(
* A standard Tcl result.
*
* Side effects:
- * None.
+ * None.
*
*---------------------------------------------------------------------------
*/
@@ -2680,7 +2616,7 @@ Tcl_AppendPrintfToObj(
* A refcount zero Tcl_Obj.
*
* Side effects:
- * None.
+ * None.
*
*---------------------------------------------------------------------------
*/
@@ -2708,8 +2644,8 @@ Tcl_ObjPrintf(
*
* 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.
+ * 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.
@@ -2717,68 +2653,124 @@ Tcl_ObjPrintf(
*---------------------------------------------------------------------------
*/
+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 *
TclStringObjReverse(
Tcl_Obj *objPtr)
{
String *stringPtr;
- int numChars = Tcl_GetCharLength(objPtr);
- int i = 0, lastCharIdx = numChars - 1;
- char *bytes;
+ Tcl_UniChar ch;
+
+ if (TclIsPureByteArray(objPtr)) {
+ int numBytes;
+ unsigned char *from = Tcl_GetByteArrayFromObj(objPtr, &numBytes);
- if (numChars <= 1) {
+ 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 *source = stringPtr->unicode;
+ Tcl_UniChar *from = Tcl_GetUnicode(objPtr);
+ Tcl_UniChar *src = from + stringPtr->numChars;
if (Tcl_IsShared(objPtr)) {
- Tcl_UniChar *dest, ch = 0;
+ Tcl_UniChar *to;
/*
* Create a non-empty, pure unicode value, so we can coax
* Tcl_SetObjLength into growing the unicode rep buffer.
*/
- Tcl_Obj *resultPtr = Tcl_NewUnicodeObj(&ch, 1);
- Tcl_SetObjLength(resultPtr, numChars);
- dest = Tcl_GetUnicode(resultPtr);
-
- while (i < numChars) {
- dest[i++] = source[lastCharIdx--];
+ ch = 0;
+ objPtr = Tcl_NewUnicodeObj(&ch, 1);
+ Tcl_SetObjLength(objPtr, stringPtr->numChars);
+ to = Tcl_GetUnicode(objPtr);
+ while (--src >= from) {
+ *to++ = *src;
+ }
+ } else {
+ /* Reversing in place */
+ while (--src > from) {
+ ch = *src;
+ *src = *from;
+ *from++ = ch;
}
- return resultPtr;
}
+ }
- while (i < lastCharIdx) {
- Tcl_UniChar tmp = source[lastCharIdx];
- source[lastCharIdx--] = source[i];
- source[i++] = tmp;
+ if (objPtr->bytes) {
+ int numChars = stringPtr->numChars;
+ int numBytes = objPtr->length;
+ char *to, *from = objPtr->bytes;
+
+ if (Tcl_IsShared(objPtr)) {
+ objPtr = Tcl_NewObj();
+ Tcl_SetObjLength(objPtr, numBytes);
}
- Tcl_InvalidateStringRep(objPtr);
- stringPtr->allocated = 0;
- return objPtr;
- }
+ to = objPtr->bytes;
- bytes = TclGetString(objPtr);
- if (Tcl_IsShared(objPtr)) {
- char *dest;
- Tcl_Obj *resultPtr = Tcl_NewObj();
- Tcl_SetObjLength(resultPtr, numChars);
- dest = TclGetString(resultPtr);
- while (i < numChars) {
- dest[i++] = bytes[lastCharIdx--];
+ 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 charCount = 0;
+ int bytesLeft = numBytes;
+
+ 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 = Tcl_UtfToUniChar(from, &ch);
+
+ ReverseBytes((unsigned char *)to, (unsigned char *)from,
+ bytesInChar);
+ to += bytesInChar;
+ from += bytesInChar;
+ bytesLeft -= bytesInChar;
+ charCount++;
+ }
+
+ from = to = objPtr->bytes;
+ stringPtr->numChars = charCount;
}
- return resultPtr;
+ /* Pass 2. Reverse all the bytes. */
+ ReverseBytes((unsigned char *)to, (unsigned char *)from, numBytes);
}
- while (i < lastCharIdx) {
- char tmp = bytes[lastCharIdx];
- bytes[lastCharIdx--] = bytes[i];
- bytes[i++] = tmp;
- }
return objPtr;
}
@@ -2804,35 +2796,43 @@ FillUnicodeRep(
Tcl_Obj *objPtr) /* The object in which to fill the unicode
* rep. */
{
- String *stringPtr;
- size_t uallocated;
- char *srcEnd, *src = objPtr->bytes;
+ 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;
- stringPtr = GET_STRING(objPtr);
- if (stringPtr->numChars == -1) {
- stringPtr->numChars = Tcl_NumUtfChars(src, objPtr->length);
+ if (stringPtr->hasUnicode) {
+ numOrigChars = stringPtr->numChars;
}
- stringPtr->hasUnicode = (stringPtr->numChars > 0);
-
- stringCheckLimits(stringPtr->numChars);
- uallocated = STRING_UALLOC(stringPtr->numChars);
- if (uallocated > stringPtr->uallocated) {
- GrowUnicodeBuffer(objPtr, 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);
}
- /*
- * Convert src to Unicode and store the coverted data in "unicode".
- */
-
- srcEnd = src + objPtr->length;
- for (dst = stringPtr->unicode; src < srcEnd; dst++) {
- src += TclUtfToUniChar(src, dst);
+ stringPtr->hasUnicode = 1;
+ stringPtr->numChars = needed;
+ for (dst=stringPtr->unicode + numOrigChars; numAppendChars-- > 0; dst++) {
+ bytes += TclUtfToUniChar(bytes, dst);
}
*dst = 0;
-
- SET_STRING(objPtr, stringPtr);
}
/*
@@ -2855,36 +2855,49 @@ FillUnicodeRep(
static void
DupStringInternalRep(
- register Tcl_Obj *srcPtr, /* Object with internal rep to copy. Must have
+ Tcl_Obj *srcPtr, /* Object with internal rep to copy. Must have
* an internal rep of type "String". */
- register Tcl_Obj *copyPtr) /* Object with internal rep to set. Must not
+ 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 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 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.
+ */
- if (srcStringPtr->hasUnicode == 0) {
- copyStringPtr = (String *) ckalloc(sizeof(String));
- copyStringPtr->uallocated = 0;
- } else {
- copyStringPtr = (String *) ckalloc(
- STRING_SIZE(srcStringPtr->uallocated));
- copyStringPtr->uallocated = srcStringPtr->uallocated;
+ 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,
- (size_t) srcStringPtr->numChars * sizeof(Tcl_UniChar));
+ srcStringPtr->numChars * sizeof(Tcl_UniChar));
copyStringPtr->unicode[srcStringPtr->numChars] = 0;
+ } else {
+ copyStringPtr = stringAlloc(0);
+ copyStringPtr->maxChars = 0;
+ copyStringPtr->unicode[0] = 0;
}
- copyStringPtr->numChars = srcStringPtr->numChars;
copyStringPtr->hasUnicode = srcStringPtr->hasUnicode;
- copyStringPtr->allocated = srcStringPtr->allocated;
+ copyStringPtr->numChars = srcStringPtr->numChars;
/*
* Tricky point: the string value was copied by generic object management
@@ -2892,7 +2905,42 @@ DupStringInternalRep(
* source object.
*/
- copyStringPtr->allocated = copyPtr->length;
+ 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;
@@ -2918,43 +2966,29 @@ DupStringInternalRep(
static int
SetStringFromAny(
Tcl_Interp *interp, /* Used for error reporting if not NULL. */
- register Tcl_Obj *objPtr) /* The object to convert. */
+ Tcl_Obj *objPtr) /* The object to convert. */
{
- /*
- * The Unicode 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 copy the bytes to the unicodeObj->unicode.
- */
-
if (objPtr->typePtr != &tclStringType) {
- String *stringPtr;
+ String *stringPtr = stringAlloc(0);
- if (objPtr->typePtr != NULL) {
- if (objPtr->bytes == NULL) {
- objPtr->typePtr->updateStringProc(objPtr);
- }
- TclFreeIntRep(objPtr);
- }
- objPtr->typePtr = &tclStringType;
+ /*
+ * Convert whatever we have into an untyped value. Just A String.
+ */
+
+ (void) TclGetString(objPtr);
+ TclFreeIntRep(objPtr);
/*
- * Allocate enough space for the basic String structure.
+ * Create a basic String intrep that just points to the UTF-8 string
+ * already in place at objPtr->bytes.
*/
- stringPtr = (String *) ckalloc(sizeof(String));
stringPtr->numChars = -1;
- stringPtr->uallocated = 0;
+ stringPtr->allocated = objPtr->length;
+ stringPtr->maxChars = 0;
stringPtr->hasUnicode = 0;
-
- if (objPtr->bytes != NULL) {
- stringPtr->allocated = objPtr->length;
- if (objPtr->bytes != tclEmptyStringRep) {
- objPtr->bytes[objPtr->length] = 0;
- }
- } else {
- objPtr->length = 0;
- }
SET_STRING(objPtr, stringPtr);
+ objPtr->typePtr = &tclStringType;
}
return TCL_OK;
}
@@ -2981,57 +3015,75 @@ static void
UpdateStringOfString(
Tcl_Obj *objPtr) /* Object with string rep to update. */
{
- int i, size;
- Tcl_UniChar *unicode;
- char dummy[TCL_UTF_MAX];
- char *dst;
- String *stringPtr;
+ String *stringPtr = GET_STRING(objPtr);
- stringPtr = GET_STRING(objPtr);
- if ((objPtr->bytes == NULL) || (stringPtr->allocated == 0)) {
- if (stringPtr->numChars <= 0) {
- /*
- * If there is no Unicode rep, or the string has 0 chars, then set
- * the string rep to an empty string.
- */
+ if (stringPtr->numChars == 0) {
+ TclInitStringRep(objPtr, tclEmptyStringRep, 0);
+ } else {
+ (void) ExtendStringRepWithUnicode(objPtr, stringPtr->unicode,
+ stringPtr->numChars);
+ }
+}
- objPtr->bytes = tclEmptyStringRep;
- objPtr->length = 0;
- return;
- }
+static int
+ExtendStringRepWithUnicode(
+ Tcl_Obj *objPtr,
+ const Tcl_UniChar *unicode,
+ int numChars)
+{
+ /*
+ * Pre-condition: this is the "string" Tcl_ObjType.
+ */
- unicode = stringPtr->unicode;
+ int i, origLength, size = 0;
+ char *dst, buf[TCL_UTF_MAX];
+ String *stringPtr = GET_STRING(objPtr);
- /*
- * Translate the Unicode string to UTF. "size" will hold the amount of
- * space the UTF string needs.
- */
+ if (numChars < 0) {
+ numChars = UnicodeLength(unicode);
+ }
- if (stringPtr->numChars <= INT_MAX/TCL_UTF_MAX
- && stringPtr->allocated >= stringPtr->numChars * (size_t)TCL_UTF_MAX) {
- goto copyBytes;
- }
+ if (numChars == 0) {
+ return 0;
+ }
- size = 0;
- for (i = 0; i < stringPtr->numChars && size >= 0; i++) {
- size += Tcl_UniCharToUtf((int) unicode[i], dummy);
- }
- if (size < 0) {
- Tcl_Panic("max size for a Tcl value (%d bytes) exceeded", INT_MAX);
- }
+ if (objPtr->bytes == NULL) {
+ objPtr->length = 0;
+ }
+ size = origLength = objPtr->length;
+
+ /*
+ * Quick cheap check in case we have more than enough room.
+ */
- objPtr->bytes = (char *) ckalloc((unsigned) (size + 1));
- objPtr->length = size;
- stringPtr->allocated = size;
+ if (numChars <= (INT_MAX - size)/TCL_UTF_MAX
+ && stringPtr->allocated >= size + numChars * TCL_UTF_MAX) {
+ goto copyBytes;
+ }
- copyBytes:
- dst = objPtr->bytes;
- for (i = 0; i < stringPtr->numChars; i++) {
- dst += Tcl_UniCharToUtf(unicode[i], dst);
- }
- *dst = '\0';
+ 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);
}
- return;
+
+ /*
+ * 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((int) unicode[i], dst);
+ }
+ *dst = '\0';
+ objPtr->length = dst - objPtr->bytes;
+ return numChars;
}
/*
@@ -3055,7 +3107,7 @@ static void
FreeStringInternalRep(
Tcl_Obj *objPtr) /* Object with internal rep to free. */
{
- ckfree((char *) GET_STRING(objPtr));
+ ckfree(GET_STRING(objPtr));
objPtr->typePtr = NULL;
}