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authordkf <donal.k.fellows@manchester.ac.uk>2002-04-19 13:08:56 (GMT)
committerdkf <donal.k.fellows@manchester.ac.uk>2002-04-19 13:08:56 (GMT)
commitd2af1305c613b7c578a4b5be8e1ff487917b4237 (patch)
treefd5fb2f5a0a9a949aa8431b40367cc9664d2f8ea /generic/tclUtil.c
parent21901763f1b2265d4cd44100b084ab75ccf8d342 (diff)
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list/string indexes don't destroy wide int rep [Bug #526717]
Diffstat (limited to 'generic/tclUtil.c')
-rw-r--r--generic/tclUtil.c128
1 files changed, 80 insertions, 48 deletions
diff --git a/generic/tclUtil.c b/generic/tclUtil.c
index d855381..b83c7c8 100644
--- a/generic/tclUtil.c
+++ b/generic/tclUtil.c
@@ -11,7 +11,7 @@
* See the file "license.terms" for information on usage and redistribution
* of this file, and for a DISCLAIMER OF ALL WARRANTIES.
*
- * RCS: @(#) $Id: tclUtil.c,v 1.30 2002/03/20 22:47:36 dgp Exp $
+ * RCS: @(#) $Id: tclUtil.c,v 1.31 2002/04/19 13:08:56 dkf Exp $
*/
#include "tclInt.h"
@@ -67,9 +67,9 @@ TCL_DECLARE_MUTEX(precisionMutex)
* Prototypes for procedures defined later in this file.
*/
-static void UpdateStringOfEndOffset _ANSI_ARGS_(( Tcl_Obj* objPtr ));
-static int SetEndOffsetFromAny _ANSI_ARGS_(( Tcl_Interp* interp,
- Tcl_Obj* objPtr ));
+static void UpdateStringOfEndOffset _ANSI_ARGS_((Tcl_Obj* objPtr));
+static int SetEndOffsetFromAny _ANSI_ARGS_((Tcl_Interp* interp,
+ Tcl_Obj* objPtr));
/*
* The following is the Tcl object type definition for an object
@@ -2179,7 +2179,7 @@ TclLooksLikeInt(bytes, length)
*
* Side effects:
* The object referenced by "objPtr" might be converted to an
- * integer object.
+ * integer, wide integer, or end-based-index object.
*
*----------------------------------------------------------------------
*/
@@ -2198,44 +2198,82 @@ TclGetIntForIndex(interp, objPtr, endValue, indexPtr)
{
char *bytes;
int length, offset;
+#ifndef TCL_WIDE_INT_IS_LONG
+ Tcl_WideInt wideOffset;
+#endif
- /* If the object is already an integer, use it. */
+ /*
+ * If the object is already an integer, use it.
+ */
if (objPtr->typePtr == &tclIntType) {
*indexPtr = (int)objPtr->internalRep.longValue;
return TCL_OK;
}
- if ( SetEndOffsetFromAny( NULL, objPtr ) == TCL_OK ) {
+ /*
+ * If the object is already a wide-int, and it is not out of range
+ * for an integer, use it. [Bug #526717]
+ */
+#ifndef TCL_WIDE_INT_IS_LONG
+ if (objPtr->typePtr == &tclWideIntType) {
+ Tcl_WideInt wideOffset = objPtr->internalRep.wideValue;
+ if (wideOffset >= Tcl_LongAsWide(INT_MIN)
+ && wideOffset <= Tcl_LongAsWide(INT_MAX)) {
+ *indexPtr = (int) Tcl_WideAsLong(wideOffset);
+ return TCL_OK;
+ }
+ }
+#endif /* TCL_WIDE_INT_IS_LONG */
+ if (SetEndOffsetFromAny(NULL, objPtr) == TCL_OK) {
/*
- * If the object is already an offset from the end of the list, or
- * can be converted to one, use it.
+ * If the object is already an offset from the end of the
+ * list, or can be converted to one, use it.
*/
*indexPtr = endValue + objPtr->internalRep.longValue;
- } else if ( Tcl_GetIntFromObj( NULL, objPtr, &offset ) == TCL_OK ) {
-
+#ifdef TCL_WIDE_INT_IS_LONG
+ } else if (Tcl_GetIntFromObj(NULL, objPtr, &offset) == TCL_OK) {
/*
* If the object can be converted to an integer, use that.
*/
*indexPtr = offset;
- } else {
+#else /* !TCL_WIDE_INT_IS_LONG */
+ } else if (Tcl_GetWideIntFromObj(NULL, objPtr, &wideOffset) == TCL_OK) {
+ /*
+ * If the object can be converted to a wide integer, use
+ * that. [Bug #526717]
+ */
+
+ offset = (int) Tcl_WideAsLong(wideOffset);
+ if (Tcl_LongAsWide(offset) == wideOffset) {
+ /*
+ * But it is representable as a narrow integer, so we
+ * prefer that (so preserving old behaviour in the
+ * majority of cases.)
+ */
+ objPtr->typePtr = &tclIntType;
+ objPtr->internalRep.longValue = offset;
+ }
+ *indexPtr = offset;
+#endif /* TCL_WIDE_INT_IS_LONG */
+ } else {
/*
* Report a parse error.
*/
if ((Interp *)interp != NULL) {
- bytes = Tcl_GetStringFromObj( objPtr, &length );
- Tcl_AppendStringsToObj( Tcl_GetObjResult(interp),
- "bad index \"", bytes,
- "\": must be integer or end?-integer?",
- (char *) NULL);
- if ( !strncmp ( bytes, "end-", 3 ) ) {
+ bytes = Tcl_GetStringFromObj(objPtr, &length);
+ Tcl_AppendStringsToObj(Tcl_GetObjResult(interp),
+ "bad index \"", bytes,
+ "\": must be integer or end?-integer?",
+ (char *) NULL);
+ if (!strncmp(bytes, "end-", 3)) {
bytes += 3;
}
TclCheckBadOctal(interp, bytes);
@@ -2245,7 +2283,6 @@ TclGetIntForIndex(interp, objPtr, endValue, indexPtr)
}
return TCL_OK;
-
}
/*
@@ -2270,21 +2307,20 @@ TclGetIntForIndex(interp, objPtr, endValue, indexPtr)
*/
static void
-UpdateStringOfEndOffset( objPtr )
+UpdateStringOfEndOffset(objPtr)
register Tcl_Obj* objPtr;
{
- char buffer[ TCL_INTEGER_SPACE + sizeof("end") + 1 ];
+ char buffer[TCL_INTEGER_SPACE + sizeof("end") + 1];
register int len;
- strcpy( buffer, "end" );
- len = sizeof( "end" ) - 1;
- if ( objPtr->internalRep.longValue != 0 ) {
+ strcpy(buffer, "end");
+ len = sizeof("end") - 1;
+ if (objPtr->internalRep.longValue != 0) {
buffer[len++] = '-';
- len += TclFormatInt( buffer + len,
- -( objPtr->internalRep.longValue ) );
+ len += TclFormatInt(buffer+len, -(objPtr->internalRep.longValue));
}
- objPtr->bytes = ckalloc( (unsigned) ( len + 1 ) );
- strcpy( objPtr->bytes, buffer );
+ objPtr->bytes = ckalloc((unsigned) (len+1));
+ strcpy(objPtr->bytes, buffer);
objPtr->length = len;
}
@@ -2307,10 +2343,9 @@ UpdateStringOfEndOffset( objPtr )
*/
static int
-SetEndOffsetFromAny( Tcl_Interp* interp,
- /* Tcl interpreter or NULL */
- Tcl_Obj* objPtr )
- /* Pointer to the object to parse */
+SetEndOffsetFromAny(interp, objPtr)
+ Tcl_Interp* interp; /* Tcl interpreter or NULL */
+ Tcl_Obj* objPtr; /* Pointer to the object to parse */
{
int offset; /* Offset in the "end-offset" expression */
Tcl_ObjType* oldTypePtr = objPtr->typePtr;
@@ -2320,7 +2355,7 @@ SetEndOffsetFromAny( Tcl_Interp* interp,
/* If it's already the right type, we're fine. */
- if ( objPtr->typePtr == &tclEndOffsetType ) {
+ if (objPtr->typePtr == &tclEndOffsetType) {
return TCL_OK;
}
@@ -2329,11 +2364,11 @@ SetEndOffsetFromAny( Tcl_Interp* interp,
bytes = Tcl_GetStringFromObj(objPtr, &length);
if ((*bytes != 'e') || (strncmp(bytes, "end",
(size_t)((length > 3) ? 3 : length)) != 0)) {
- if ( interp != NULL ) {
- Tcl_AppendStringsToObj( Tcl_GetObjResult( interp ),
- "bad index \"", bytes,
- "\": must be end?-integer?",
- (char*) NULL );
+ if (interp != NULL) {
+ Tcl_AppendStringsToObj(Tcl_GetObjResult(interp),
+ "bad index \"", bytes,
+ "\": must be end?-integer?",
+ (char*) NULL);
}
return TCL_ERROR;
}
@@ -2343,7 +2378,6 @@ SetEndOffsetFromAny( Tcl_Interp* interp,
if (length <= 3) {
offset = 0;
} else if (bytes[3] == '-') {
-
/*
* This is our limited string expression evaluator
*/
@@ -2352,18 +2386,16 @@ SetEndOffsetFromAny( Tcl_Interp* interp,
}
} else {
-
- /* Conversion failed. Report the error. */
-
-
- if ( interp != NULL ) {
+ /*
+ * Conversion failed. Report the error.
+ */
+ if (interp != NULL) {
Tcl_AppendStringsToObj(Tcl_GetObjResult(interp),
"bad index \"", bytes,
"\": must be integer or end?-integer?",
(char *) NULL);
}
return TCL_ERROR;
-
}
/*
@@ -2465,7 +2497,7 @@ TclCheckBadOctal(interp, value)
CONST char *
Tcl_GetNameOfExecutable()
{
- return (tclExecutableName);
+ return tclExecutableName;
}
/*
@@ -2488,8 +2520,8 @@ Tcl_GetNameOfExecutable()
*/
void
-TclpGetTime( timePtr )
+TclpGetTime(timePtr)
Tcl_Time* timePtr;
{
- Tcl_GetTime( timePtr );
+ Tcl_GetTime(timePtr);
}