diff options
Diffstat (limited to 'generic/tclStringObj.c')
| -rw-r--r-- | generic/tclStringObj.c | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/generic/tclStringObj.c b/generic/tclStringObj.c index 756b948..b4f05dd 100644 --- a/generic/tclStringObj.c +++ b/generic/tclStringObj.c @@ -772,7 +772,7 @@ Tcl_GetRange( if (TclIsPureByteArray(objPtr)) { unsigned char *bytes = Tcl_GetByteArrayFromObj(objPtr, &length); - if (last >= length) { + if (last < 0 || last >= length) { last = length - 1; } if (last < first) { @@ -798,7 +798,7 @@ Tcl_GetRange( TclNumUtfChars(stringPtr->numChars, objPtr->bytes, objPtr->length); } if (stringPtr->numChars == objPtr->length) { - if (last >= stringPtr->numChars) { + if (last < 0 || last >= stringPtr->numChars) { last = stringPtr->numChars - 1; } if (last < first) { @@ -819,7 +819,7 @@ Tcl_GetRange( FillUnicodeRep(objPtr); stringPtr = GET_STRING(objPtr); } - if (last >= stringPtr->numChars) { + if (last < 0 || last >= stringPtr->numChars) { last = stringPtr->numChars - 1; } if (last < first) { @@ -2116,7 +2116,11 @@ Tcl_AppendFormatToObj( if (gotPrecision) { numChars = Tcl_GetCharLength(segment); if (precision < numChars) { - segment = Tcl_GetRange(segment, 0, precision - 1); + if (precision < 1) { + TclNewObj(segment); + } else { + segment = Tcl_GetRange(segment, 0, precision - 1); + } numChars = precision; Tcl_IncrRefCount(segment); allocSegment = 1; |