diff options
| -rw-r--r-- | ChangeLog | 3 | ||||
| -rw-r--r-- | doc/StringObj.3 | 22 |
2 files changed, 8 insertions, 17 deletions
@@ -1,5 +1,8 @@ 2001-08-31 Jeff Hobbs <jeffh@ActiveState.com> + * doc/StringObj.3: added words of warning to use Tcl_ResetResult + with the Tcl_Append* functions. + * tests/compile.test: added compile-11.* interp result checks * generic/tclUtil.c (TclGetIntForIndex): added Tcl_ResetResult before Tcl_AppendStringsToObj to prevent shared object crash when diff --git a/doc/StringObj.3 b/doc/StringObj.3 index b1c5c00..f21c667 100644 --- a/doc/StringObj.3 +++ b/doc/StringObj.3 @@ -4,7 +4,7 @@ '\" See the file "license.terms" for information on usage and redistribution '\" of this file, and for a DISCLAIMER OF ALL WARRANTIES. '\" -'\" RCS: @(#) $Id: StringObj.3,v 1.8 2001/04/06 23:14:08 andreas_kupries Exp $ +'\" RCS: @(#) $Id: StringObj.3,v 1.9 2001/08/31 17:59:32 hobbs Exp $ '\" .so man.macros .TH Tcl_StringObj 3 8.1 Tcl "Tcl Library Procedures" @@ -17,26 +17,21 @@ Tcl_NewStringObj, Tcl_NewUnicodeObj, Tcl_SetStringObj, Tcl_SetUnicodeObj, Tcl_Ge .sp Tcl_Obj * \fBTcl_NewStringObj\fR(\fIbytes, length\fR) -.VS 8.1.2 .sp Tcl_Obj * \fBTcl_NewUnicodeObj\fR(\fIunicode, numChars\fR) -.VE .sp void \fBTcl_SetStringObj\fR(\fIobjPtr, bytes, length\fR) -.VS 8.1.2 .sp void \fBTcl_SetUnicodeObj\fR(\fIobjPtr, unicode, numChars\fR) -.VE .sp char * \fBTcl_GetStringFromObj\fR(\fIobjPtr, lengthPtr\fR) .sp char * \fBTcl_GetString\fR(\fIobjPtr\fR) -.VS 8.1.2 .sp Tcl_UniChar * \fBTcl_GetUnicode\fR(\fIobjPtr\fR) @@ -49,15 +44,12 @@ int .sp Tcl_Obj * \fBTcl_GetRange\fR(\fIobjPtr, first, last\fR) -.VE .sp void \fBTcl_AppendToObj\fR(\fIobjPtr, bytes, length\fR) -.VS 8.1.2 .sp void \fBTcl_AppendUnicodeToObj\fR(\fIobjPtr, unicode, numChars\fR) -.VE .sp void \fBTcl_AppendObjToObj\fR(\fIobjPtr, appendObjPtr\fR) @@ -92,7 +84,6 @@ Points to the first byte of an array of Unicode characters used to set or append to a string object. This byte array may contain embedded null characters unless \fInumChars\fR is negative. -.VS 8.1.2 .AP int numChars in The number of Unicode characters to copy from \fIunicode\fR when initializing, setting, or appending to a string object. @@ -105,7 +96,6 @@ returned as a new object. .AP int last in The index of the last Unicode character in the Unicode range to be returned as a new object. -.VE .AP Tcl_Obj *objPtr in/out Points to an object to manipulate. .AP Tcl_Obj *appendObjPtr in @@ -135,12 +125,13 @@ of the object to store additional information to make the string manipulations more efficient. In particular, they make a series of append operations efficient by allocating extra storage space for the string so that it doesn't have to be copied for each append. -.VS 8.1.2 Also, indexing and length computations are optimized because the Unicode string representation is calculated and cached as needed. -.VE +When using the \fBTcl_Append*\fR family of functions where the +interpreter's result is the object being appended to, it is important +to call Tcl_ResetResult first to ensure you are not unintentionally +appending to existing data in the result object. .PP -.VS 8.1.2 \fBTcl_NewStringObj\fR and \fBTcl_SetStringObj\fR create a new object or modify an existing object to hold a copy of the string given by \fIbytes\fR and \fIlength\fR. \fBTcl_NewUnicodeObj\fR and @@ -152,7 +143,6 @@ All four procedures set the object to hold a copy of the specified string. \fBTcl_SetStringObj\fR and \fBTcl_SetUnicodeObj\fR free any old string representation as well as any old internal representation of the object. -.VE .PP \fBTcl_GetStringFromObj\fR and \fBTcl_GetString\fR return an object's string representation. This is given by the returned byte pointer and @@ -166,7 +156,6 @@ caller. The procedure \fBTcl_GetString\fR is used in the common case where the caller does not need the length of the string representation. .PP -.VS 8.1.2 \fBTcl_GetUnicode\fR returns an object's value as a Unicode string. \fBTcl_GetUniChar\fR returns the \fIindex\fR'th character in the object's Unicode representation. @@ -203,7 +192,6 @@ object's string value). appends the string or Unicode value (whichever exists and is best suited to be appended to \fIobjPtr\fR) of \fIappendObjPtr\fR to \fIobjPtr\fR. -.VE .PP \fBTcl_AppendStringsToObj\fR is similar to \fBTcl_AppendToObj\fR except that it can be passed more than one value to append and |