diff options
| -rw-r--r-- | ChangeLog | 9 | ||||
| -rw-r--r-- | generic/tclDictObj.c | 11 | ||||
| -rw-r--r-- | generic/tclListObj.c | 55 |
3 files changed, 64 insertions, 11 deletions
@@ -1,3 +1,12 @@ +2008-07-20 Donal K. Fellows <donal.k.fellows@man.ac.uk> + + * generic/tclDictObj.c (SetDictFromAny): Make the list->dict + transformation a bit more efficient; modern dicts are ordered and so + we can round-trip through lists without needing the string rep at all. + * generic/tclListObj.c (SetListFromAny): Make the dict->list + transformation not lossy of internal representations and hence more + efficient. [Bug 2008248] (ajpasadyn) but using a more efficient patch. + 2008-07-15 Donal K. Fellows <donal.k.fellows@man.ac.uk> * doc/DictObj.3: Fix error in example. [Bug 2016740] diff --git a/generic/tclDictObj.c b/generic/tclDictObj.c index a33802d..c74f10f 100644 --- a/generic/tclDictObj.c +++ b/generic/tclDictObj.c @@ -9,7 +9,7 @@ * See the file "license.terms" for information on usage and redistribution of * this file, and for a DISCLAIMER OF ALL WARRANTIES. * - * RCS: @(#) $Id: tclDictObj.c,v 1.56 2007/12/13 15:23:16 dgp Exp $ + * RCS: @(#) $Id: tclDictObj.c,v 1.56.2.1 2008/07/20 22:02:37 dkf Exp $ */ #include "tclInt.h" @@ -588,15 +588,6 @@ SetDictFromAny( } /* - * If the list is shared its string rep must not be lost so it still - * is the same list. - */ - - if (Tcl_IsShared(objPtr)) { - (void) TclGetString(objPtr); - } - - /* * Build the hash of key/value pairs. */ diff --git a/generic/tclListObj.c b/generic/tclListObj.c index 556a41d..2bbaa22 100644 --- a/generic/tclListObj.c +++ b/generic/tclListObj.c @@ -10,7 +10,7 @@ * See the file "license.terms" for information on usage and redistribution of * this file, and for a DISCLAIMER OF ALL WARRANTIES. * - * RCS: @(#) $Id: tclListObj.c,v 1.49 2007/12/13 15:23:18 dgp Exp $ + * RCS: @(#) $Id: tclListObj.c,v 1.49.2.1 2008/07/20 22:02:39 dkf Exp $ */ #include "tclInt.h" @@ -1658,6 +1658,58 @@ SetListFromAny( List *listRepPtr; /* + * Dictionaries are a special case; they have a string representation such + * that *all* valid dictionaries are valid lists. Hence we can convert + * more directly. + */ + + if (objPtr->typePtr == &tclDictType) { + Tcl_Obj *keyPtr, *valuePtr; + Tcl_DictSearch search; + int done, size; + + /* + * Create the new list representation. Note that we do not need to do + * anything with the string representation as the transformation (and + * the reverse back to a dictionary) are both order-preserving. Also + * note that since we know we've got a valid dictionary (by + * representation) we also know that fetching the size of the + * dictionary or iterating over it will not fail. + */ + + Tcl_DictObjSize(NULL, objPtr, &size); + listRepPtr = NewListIntRep(size > 0 ? 2*size : 1, NULL); + if (!listRepPtr) { + Tcl_SetResult(interp, + "insufficient memory to allocate list working space", + TCL_STATIC); + return TCL_ERROR; + } + listRepPtr->elemCount = 2 * size; + + /* + * Populate the list representation. + */ + + elemPtrs = &listRepPtr->elements; + Tcl_DictObjFirst(NULL, objPtr, &search, &keyPtr, &valuePtr, &done); + i = 0; + while (!done) { + elemPtrs[i++] = keyPtr; + elemPtrs[i++] = valuePtr; + Tcl_IncrRefCount(keyPtr); + Tcl_IncrRefCount(valuePtr); + Tcl_DictObjNext(&search, &keyPtr, &valuePtr, &done); + } + + /* + * Swap the representations. + */ + + goto commitRepresentation; + } + + /* * Get the string representation. Make it up-to-date if necessary. */ @@ -1742,6 +1794,7 @@ SetListFromAny( * Tcl_GetStringFromObj, to use that old internalRep. */ + commitRepresentation: listRepPtr->refCount++; TclFreeIntRep(objPtr); objPtr->internalRep.twoPtrValue.ptr1 = (void *) listRepPtr; |