diff options
Diffstat (limited to 'generic')
-rw-r--r-- | generic/tclPathObj.c | 194 |
1 files changed, 64 insertions, 130 deletions
diff --git a/generic/tclPathObj.c b/generic/tclPathObj.c index 4e10087..9b2e67d 100644 --- a/generic/tclPathObj.c +++ b/generic/tclPathObj.c @@ -51,19 +51,14 @@ static const Tcl_ObjType fsPathType = { * represent relative or absolute paths, and has certain optimisations when * used to represent paths which are already normalized and absolute. * - * Note that both 'translatedPathPtr' and 'normPathPtr' can be a circular - * reference to the container Tcl_Obj of this FsPath. - * * There are two cases, with the first being the most common: * * (i) flags == 0, => Ordinary path. * - * translatedPathPtr contains the translated path (which may be a circular - * reference to the object itself). If it is NULL then the path is pure - * normalized (and the normPathPtr will be a circular reference). cwdPtr is - * null for an absolute path, and non-null for a relative path (unless the cwd - * has never been set, in which case the cwdPtr may also be null for a - * relative path). + * translatedPathPtr contains the translated path. If it is NULL then the path + * is pure normalized. cwdPtr is null for an absolute path, and non-null for a + * relative path (unless the cwd has never been set, in which case the cwdPtr + * may also be null for a relative path). * * (ii) flags != 0, => Special path, see TclNewFSPathObj * @@ -79,11 +74,7 @@ typedef struct FsPath { * Tcl_Obj's string rep is already both * translated and normalized. */ Tcl_Obj *normPathPtr; /* Normalized absolute path, without ., .. or - * ~user sequences. If the Tcl_Obj containing - * this FsPath is already normalized, this may - * be a circular reference back to the - * container. If that is NOT the case, we have - * a refCount on the object. */ + * ~user sequences. */ Tcl_Obj *cwdPtr; /* If null, path is absolute, else this points * to the cwd object used for this path. We * have a refCount on the object. */ @@ -110,9 +101,14 @@ typedef struct FsPath { * fields. */ -#define PATHOBJ(pathPtr) ((FsPath *) (pathPtr)->internalRep.twoPtrValue.ptr1) +#define PATHOBJ(pathPtr) ((FsPath *) (Tcl_FetchIntRep((pathPtr), &fsPathType)->twoPtrValue.ptr1)) #define SETPATHOBJ(pathPtr,fsPathPtr) \ - ((pathPtr)->internalRep.twoPtrValue.ptr1 = (void *) (fsPathPtr)) + do { \ + Tcl_ObjIntRep ir; \ + ir.twoPtrValue.ptr1 = (void *) (fsPathPtr); \ + ir.twoPtrValue.ptr2 = NULL; \ + Tcl_StoreIntRep((pathPtr), &fsPathType, &ir); \ + } while (0) #define PATHFLAGS(pathPtr) (PATHOBJ(pathPtr)->flags) /* @@ -564,7 +560,9 @@ TclPathPart( Tcl_Obj *pathPtr, /* Path to take dirname of */ Tcl_PathPart portion) /* Requested portion of name */ { - if (pathPtr->typePtr == &fsPathType) { + Tcl_ObjIntRep *irPtr = Tcl_FetchIntRep(pathPtr, &fsPathType); + + if (irPtr) { FsPath *fsPathPtr = PATHOBJ(pathPtr); if (PATHFLAGS(pathPtr) != 0) { @@ -864,6 +862,7 @@ TclJoinPath( if (elements == 2) { Tcl_Obj *elt = objv[0]; + Tcl_ObjIntRep *eltIr = Tcl_FetchIntRep(elt, &fsPathType); /* * This is a special case where we can be much more efficient, where @@ -877,7 +876,7 @@ TclJoinPath( * to be an absolute path. Added a check for that elt is absolute. */ - if ((elt->typePtr == &fsPathType) + if ((eltIr) && !((elt->bytes != NULL) && (elt->bytes[0] == '\0')) && TclGetPathType(elt, NULL, NULL, NULL) == TCL_PATH_ABSOLUTE) { Tcl_Obj *tailObj = objv[1]; @@ -1154,6 +1153,8 @@ Tcl_FSConvertToPathType( Tcl_Obj *pathPtr) /* Object to convert to a valid, current path * type. */ { + Tcl_ObjIntRep *irPtr = Tcl_FetchIntRep(pathPtr, &fsPathType); + /* * While it is bad practice to examine an object's type directly, this is * actually the best thing to do here. The reason is that if we are @@ -1164,7 +1165,7 @@ Tcl_FSConvertToPathType( * path. */ - if (pathPtr->typePtr == &fsPathType) { + if (irPtr) { if (TclFSEpochOk(PATHOBJ(pathPtr)->filesystemEpoch)) { return TCL_OK; } @@ -1172,7 +1173,7 @@ Tcl_FSConvertToPathType( if (pathPtr->bytes == NULL) { UpdateStringOfFsPath(pathPtr); } - FreeFsPathInternalRep(pathPtr); + Tcl_StoreIntRep(pathPtr, &fsPathType, NULL); } return SetFsPathFromAny(interp, pathPtr); @@ -1328,7 +1329,6 @@ TclNewFSPathObj( SETPATHOBJ(pathPtr, fsPathPtr); PATHFLAGS(pathPtr) = TCLPATH_APPENDED; - pathPtr->typePtr = &fsPathType; pathPtr->bytes = NULL; pathPtr->length = 0; @@ -1430,8 +1430,9 @@ TclFSMakePathRelative( { int cwdLen, len; const char *tempStr; + Tcl_ObjIntRep *irPtr = Tcl_FetchIntRep(pathPtr, &fsPathType); - if (pathPtr->typePtr == &fsPathType) { + if (irPtr) { FsPath *fsPathPtr = PATHOBJ(pathPtr); if (PATHFLAGS(pathPtr) != 0 && fsPathPtr->cwdPtr == cwdPtr) { @@ -1498,31 +1499,12 @@ MakePathFromNormalized( Tcl_Obj *pathPtr) /* The object to convert. */ { FsPath *fsPathPtr; + Tcl_ObjIntRep *irPtr = Tcl_FetchIntRep(pathPtr, &fsPathType); - if (pathPtr->typePtr == &fsPathType) { + if (irPtr) { return TCL_OK; } - /* - * Free old representation - */ - - if (pathPtr->typePtr != NULL) { - if (pathPtr->bytes == NULL) { - if (pathPtr->typePtr->updateStringProc == NULL) { - if (interp != NULL) { - Tcl_SetObjResult(interp, Tcl_NewStringObj( - "can't find object string representation", -1)); - Tcl_SetErrorCode(interp, "TCL", "VALUE", "PATH", "WTF", - NULL); - } - return TCL_ERROR; - } - pathPtr->typePtr->updateStringProc(pathPtr); - } - TclFreeIntRep(pathPtr); - } - fsPathPtr = ckalloc(sizeof(FsPath)); /* @@ -1531,11 +1513,7 @@ MakePathFromNormalized( fsPathPtr->translatedPathPtr = NULL; - /* - * Circular reference by design. - */ - - fsPathPtr->normPathPtr = pathPtr; + Tcl_IncrRefCount(fsPathPtr->normPathPtr = Tcl_DuplicateObj(pathPtr)); fsPathPtr->cwdPtr = NULL; fsPathPtr->nativePathPtr = NULL; fsPathPtr->fsPtr = NULL; @@ -1544,7 +1522,6 @@ MakePathFromNormalized( SETPATHOBJ(pathPtr, fsPathPtr); PATHFLAGS(pathPtr) = 0; - pathPtr->typePtr = &fsPathType; return TCL_OK; } @@ -1595,25 +1572,12 @@ Tcl_FSNewNativePath( * safe. */ - if (pathPtr->typePtr != NULL) { - if (pathPtr->bytes == NULL) { - if (pathPtr->typePtr->updateStringProc == NULL) { - return NULL; - } - pathPtr->typePtr->updateStringProc(pathPtr); - } - TclFreeIntRep(pathPtr); - } - + Tcl_StoreIntRep(pathPtr, &fsPathType, NULL); fsPathPtr = ckalloc(sizeof(FsPath)); fsPathPtr->translatedPathPtr = NULL; - /* - * Circular reference, by design. - */ - - fsPathPtr->normPathPtr = pathPtr; + Tcl_IncrRefCount(fsPathPtr->normPathPtr = Tcl_DuplicateObj(pathPtr)); fsPathPtr->cwdPtr = NULL; fsPathPtr->nativePathPtr = clientData; fsPathPtr->fsPtr = fromFilesystem; @@ -1621,7 +1585,6 @@ Tcl_FSNewNativePath( SETPATHOBJ(pathPtr, fsPathPtr); PATHFLAGS(pathPtr) = 0; - pathPtr->typePtr = &fsPathType; return pathPtr; } @@ -1668,20 +1631,22 @@ Tcl_FSGetTranslatedPath( Tcl_Obj *translatedCwdPtr = Tcl_FSGetTranslatedPath(interp, srcFsPathPtr->cwdPtr); + Tcl_ObjIntRep *translatedCwdIrPtr; + if (translatedCwdPtr == NULL) { return NULL; } retObj = Tcl_FSJoinToPath(translatedCwdPtr, 1, &srcFsPathPtr->normPathPtr); - srcFsPathPtr->translatedPathPtr = retObj; - if (translatedCwdPtr->typePtr == &fsPathType) { + Tcl_IncrRefCount(srcFsPathPtr->translatedPathPtr = retObj); + translatedCwdIrPtr = Tcl_FetchIntRep(translatedCwdPtr, &fsPathType); + if (translatedCwdIrPtr) { srcFsPathPtr->filesystemEpoch = PATHOBJ(translatedCwdPtr)->filesystemEpoch; } else { srcFsPathPtr->filesystemEpoch = 0; } - Tcl_IncrRefCount(retObj); Tcl_DecrRefCount(translatedCwdPtr); } else { /* @@ -1864,6 +1829,7 @@ Tcl_FSGetNormalizedPath( /* * That's our reference to copy used. */ + copy = NULL; TclDecrRefCount(dir); TclDecrRefCount(origDir); @@ -1876,7 +1842,7 @@ Tcl_FSGetNormalizedPath( /* * That's our reference to copy used. */ - + copy = NULL; TclDecrRefCount(dir); } PATHFLAGS(pathPtr) = 0; @@ -1891,7 +1857,7 @@ Tcl_FSGetNormalizedPath( if (pathPtr->bytes == NULL) { UpdateStringOfFsPath(pathPtr); } - FreeFsPathInternalRep(pathPtr); + Tcl_StoreIntRep(pathPtr, &fsPathType, NULL); if (SetFsPathFromAny(interp, pathPtr) != TCL_OK) { return NULL; } @@ -1917,7 +1883,6 @@ Tcl_FSGetNormalizedPath( } if (fsPathPtr->normPathPtr == NULL) { Tcl_Obj *useThisCwd = NULL; - int pureNormalized = 1; /* * Since normPathPtr is NULL, but this is a valid path object, we know @@ -1967,7 +1932,6 @@ Tcl_FSGetNormalizedPath( return NULL; } - pureNormalized = 0; Tcl_DecrRefCount(absolutePath); absolutePath = Tcl_FSJoinToPath(useThisCwd, 1, &absolutePath); Tcl_IncrRefCount(absolutePath); @@ -1987,7 +1951,6 @@ Tcl_FSGetNormalizedPath( if (absolutePath == NULL) { return NULL; } - pureNormalized = 0; #endif /* _WIN32 */ } } @@ -1996,35 +1959,12 @@ Tcl_FSGetNormalizedPath( * Already has refCount incremented. */ + if (fsPathPtr->normPathPtr) { + Tcl_DecrRefCount(fsPathPtr->normPathPtr); + } fsPathPtr->normPathPtr = TclFSNormalizeAbsolutePath(interp, absolutePath); - /* - * Check if path is pure normalized (this can only be the case if it - * is an absolute path). - */ - - if (pureNormalized) { - int normPathLen, pathLen; - const char *normPath; - - path = TclGetStringFromObj(pathPtr, &pathLen); - normPath = TclGetStringFromObj(fsPathPtr->normPathPtr, &normPathLen); - if ((pathLen == normPathLen) && !memcmp(path, normPath, pathLen)) { - /* - * The path was already normalized. Get rid of the duplicate. - */ - - TclDecrRefCount(fsPathPtr->normPathPtr); - - /* - * We do *not* increment the refCount for this circular - * reference. - */ - - fsPathPtr->normPathPtr = pathPtr; - } - } if (useThisCwd != NULL) { /* * We just need to free an object we allocated above for relative @@ -2170,8 +2110,9 @@ TclFSEnsureEpochOk( const Tcl_Filesystem **fsPtrPtr) { FsPath *srcFsPathPtr; + Tcl_ObjIntRep *irPtr = Tcl_FetchIntRep(pathPtr, &fsPathType); - if (pathPtr->typePtr != &fsPathType) { + if (irPtr == NULL) { return TCL_OK; } @@ -2190,7 +2131,7 @@ TclFSEnsureEpochOk( if (pathPtr->bytes == NULL) { UpdateStringOfFsPath(pathPtr); } - FreeFsPathInternalRep(pathPtr); + Tcl_StoreIntRep(pathPtr, &fsPathType, NULL); if (SetFsPathFromAny(NULL, pathPtr) != TCL_OK) { return TCL_ERROR; } @@ -2230,12 +2171,13 @@ TclFSSetPathDetails( ClientData clientData) { FsPath *srcFsPathPtr; + Tcl_ObjIntRep *irPtr = Tcl_FetchIntRep(pathPtr, &fsPathType);; /* * Make sure pathPtr is of the correct type. */ - if (pathPtr->typePtr != &fsPathType) { + if (irPtr == NULL) { if (SetFsPathFromAny(NULL, pathPtr) != TCL_OK) { return; } @@ -2333,8 +2275,9 @@ SetFsPathFromAny( FsPath *fsPathPtr; Tcl_Obj *transPtr; char *name; + Tcl_ObjIntRep *irPtr = Tcl_FetchIntRep(pathPtr, &fsPathType); - if (pathPtr->typePtr == &fsPathType) { + if (irPtr) { return TCL_OK; } @@ -2477,8 +2420,10 @@ SetFsPathFromAny( fsPathPtr = ckalloc(sizeof(FsPath)); fsPathPtr->translatedPathPtr = transPtr; - if (transPtr != pathPtr) { + if (fsPathPtr->translatedPathPtr != NULL) { Tcl_IncrRefCount(fsPathPtr->translatedPathPtr); + } + if (transPtr != pathPtr) { /* Redo translation when $env(HOME) changes */ fsPathPtr->filesystemEpoch = TclFSEpoch(); } else { @@ -2489,14 +2434,8 @@ SetFsPathFromAny( fsPathPtr->nativePathPtr = NULL; fsPathPtr->fsPtr = NULL; - /* - * Free old representation before installing our new one. - */ - - TclFreeIntRep(pathPtr); SETPATHOBJ(pathPtr, fsPathPtr); PATHFLAGS(pathPtr) = 0; - pathPtr->typePtr = &fsPathType; return TCL_OK; } @@ -2519,6 +2458,7 @@ FreeFsPathInternalRep( } if (fsPathPtr->cwdPtr != NULL) { TclDecrRefCount(fsPathPtr->cwdPtr); + fsPathPtr->cwdPtr = NULL; } if (fsPathPtr->nativePathPtr != NULL && fsPathPtr->fsPtr != NULL) { Tcl_FSFreeInternalRepProc *freeProc = @@ -2531,7 +2471,6 @@ FreeFsPathInternalRep( } ckfree(fsPathPtr); - pathPtr->typePtr = NULL; } static void @@ -2544,24 +2483,14 @@ DupFsPathInternalRep( SETPATHOBJ(copyPtr, copyFsPathPtr); - if (srcFsPathPtr->translatedPathPtr == srcPtr) { - /* Cycle in src -> make cycle in copy. */ - copyFsPathPtr->translatedPathPtr = copyPtr; - } else { - copyFsPathPtr->translatedPathPtr = srcFsPathPtr->translatedPathPtr; - if (copyFsPathPtr->translatedPathPtr != NULL) { - Tcl_IncrRefCount(copyFsPathPtr->translatedPathPtr); - } + copyFsPathPtr->translatedPathPtr = srcFsPathPtr->translatedPathPtr; + if (copyFsPathPtr->translatedPathPtr != NULL) { + Tcl_IncrRefCount(copyFsPathPtr->translatedPathPtr); } - if (srcFsPathPtr->normPathPtr == srcPtr) { - /* Cycle in src -> make cycle in copy. */ - copyFsPathPtr->normPathPtr = copyPtr; - } else { - copyFsPathPtr->normPathPtr = srcFsPathPtr->normPathPtr; - if (copyFsPathPtr->normPathPtr != NULL) { - Tcl_IncrRefCount(copyFsPathPtr->normPathPtr); - } + copyFsPathPtr->normPathPtr = srcFsPathPtr->normPathPtr; + if (copyFsPathPtr->normPathPtr != NULL) { + Tcl_IncrRefCount(copyFsPathPtr->normPathPtr); } copyFsPathPtr->cwdPtr = srcFsPathPtr->cwdPtr; @@ -2587,8 +2516,6 @@ DupFsPathInternalRep( } copyFsPathPtr->fsPtr = srcFsPathPtr->fsPtr; copyFsPathPtr->filesystemEpoch = srcFsPathPtr->filesystemEpoch; - - copyPtr->typePtr = &fsPathType; } /* @@ -2620,7 +2547,12 @@ UpdateStringOfFsPath( } copy = AppendPath(fsPathPtr->cwdPtr, fsPathPtr->normPathPtr); + if (Tcl_IsShared(copy)) { + copy = Tcl_DuplicateObj(copy); + } + Tcl_IncrRefCount(copy); + /* Steal copy's string rep */ pathPtr->bytes = TclGetStringFromObj(copy, &cwdLen); pathPtr->length = cwdLen; TclInitStringRep(copy, NULL, 0); @@ -2653,6 +2585,8 @@ TclNativePathInFilesystem( Tcl_Obj *pathPtr, ClientData *clientDataPtr) { + Tcl_ObjIntRep *irPtr = Tcl_FetchIntRep(pathPtr, &fsPathType); + /* * A special case is required to handle the empty path "". This is a valid * path (i.e. the user should be able to do 'file exists ""' without @@ -2660,7 +2594,7 @@ TclNativePathInFilesystem( * semantics of Tcl (at present anyway), so we have to abide by them here. */ - if (pathPtr->typePtr == &fsPathType) { + if (irPtr) { if (pathPtr->bytes != NULL && pathPtr->bytes[0] == '\0') { /* * We reject the empty path "". |