tclDictObj.c Go to the documentation of this file. /* * tclDictObj.c -- * * This file contains functions that implement the Tcl dict object type * and its accessor command. * * Copyright (c) 2002 by Donal K. Fellows. * * 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 $ */ #include "tclInt.h" #include "tommath.h" /* * Forward declaration. */ struct Dict; /* * Prototypes for functions defined later in this file: */ static void DeleteDict(struct Dict *dict); static int DictAppendCmd(ClientData dummy, Tcl_Interp *interp, int objc, Tcl_Obj *const *objv); static int DictCreateCmd(ClientData dummy, Tcl_Interp *interp, int objc, Tcl_Obj *const *objv); static int DictExistsCmd(ClientData dummy, Tcl_Interp *interp, int objc, Tcl_Obj *const *objv); static int DictFilterCmd(ClientData dummy, Tcl_Interp *interp, int objc, Tcl_Obj *const *objv); static int DictForCmd(ClientData dummy, Tcl_Interp *interp, int objc, Tcl_Obj *const *objv); static int DictGetCmd(ClientData dummy, Tcl_Interp *interp, int objc, Tcl_Obj *const *objv); static int DictIncrCmd(ClientData dummy, Tcl_Interp *interp, int objc, Tcl_Obj *const *objv); static int DictInfoCmd(ClientData dummy, Tcl_Interp *interp, int objc, Tcl_Obj *const *objv); static int DictKeysCmd(ClientData dummy, Tcl_Interp *interp, int objc, Tcl_Obj *const *objv); static int DictLappendCmd(ClientData dummy, Tcl_Interp *interp, int objc, Tcl_Obj *const *objv); static int DictMergeCmd(ClientData dummy, Tcl_Interp *interp, int objc, Tcl_Obj *const *objv); static int DictRemoveCmd(ClientData dummy, Tcl_Interp *interp, int objc, Tcl_Obj *const *objv); static int DictReplaceCmd(ClientData dummy, Tcl_Interp *interp, int objc, Tcl_Obj *const *objv); static int DictSetCmd(ClientData dummy, Tcl_Interp *interp, int objc, Tcl_Obj *const *objv); static int DictSizeCmd(ClientData dummy, Tcl_Interp *interp, int objc, Tcl_Obj *const *objv); static int DictUnsetCmd(ClientData dummy, Tcl_Interp *interp, int objc, Tcl_Obj *const *objv); static int DictUpdateCmd(ClientData dummy, Tcl_Interp *interp, int objc, Tcl_Obj *const *objv); static int DictValuesCmd(ClientData dummy, Tcl_Interp *interp, int objc, Tcl_Obj *const *objv); static int DictWithCmd(ClientData dummy, Tcl_Interp *interp, int objc, Tcl_Obj *const *objv); static void DupDictInternalRep(Tcl_Obj *srcPtr, Tcl_Obj *copyPtr); static void FreeDictInternalRep(Tcl_Obj *dictPtr); static void InvalidateDictChain(Tcl_Obj *dictObj); static int SetDictFromAny(Tcl_Interp *interp, Tcl_Obj *objPtr); static void UpdateStringOfDict(Tcl_Obj *dictPtr); static Tcl_HashEntry * AllocChainEntry(Tcl_HashTable *tablePtr,void *keyPtr); static inline void InitChainTable(struct Dict *dict); static inline void DeleteChainTable(struct Dict *dict); static inline Tcl_HashEntry *CreateChainEntry(struct Dict *dict, Tcl_Obj *keyPtr, int *newPtr); static inline int DeleteChainEntry(struct Dict *dict, Tcl_Obj *keyPtr); /* * Table of dict subcommand names and implementations. */ static const EnsembleImplMap implementationMap[] = { {"append", DictAppendCmd, TclCompileDictAppendCmd }, {"create", DictCreateCmd, NULL }, {"exists", DictExistsCmd, NULL }, {"filter", DictFilterCmd, NULL }, {"for", DictForCmd, TclCompileDictForCmd }, {"get", DictGetCmd, TclCompileDictGetCmd }, {"incr", DictIncrCmd, TclCompileDictIncrCmd }, {"info", DictInfoCmd, NULL }, {"keys", DictKeysCmd, NULL }, {"lappend", DictLappendCmd, TclCompileDictLappendCmd }, {"merge", DictMergeCmd, NULL }, {"remove", DictRemoveCmd, NULL }, {"replace", DictReplaceCmd, NULL }, {"set", DictSetCmd, TclCompileDictSetCmd }, {"size", DictSizeCmd, NULL }, {"unset", DictUnsetCmd, NULL }, {"update", DictUpdateCmd, TclCompileDictUpdateCmd }, {"values", DictValuesCmd, NULL }, {"with", DictWithCmd, NULL }, {NULL} }; /* * Internal representation of the entries in the hash table that backs a * dictionary. */ typedef struct ChainEntry { Tcl_HashEntry entry; struct ChainEntry *prevPtr; struct ChainEntry *nextPtr; } ChainEntry; /* * Internal representation of a dictionary. * * The internal representation of a dictionary object is a hash table (with * Tcl_Objs for both keys and values), a reference count and epoch number for * detecting concurrent modifications of the dictionary, and a pointer to the * parent object (used when invalidating string reps of pathed dictionary * trees) which is NULL in normal use. The fact that hash tables know (with * appropriate initialisation) already about objects makes key management /so/ * much easier! * * Reference counts are used to enable safe iteration across hashes while * allowing the type of the containing object to be modified. */ typedef struct Dict { Tcl_HashTable table; /* Object hash table to store mapping in. */ ChainEntry *entryChainHead; /* Linked list of all entries in the * dictionary. Used for doing traversal of the * entries in the order that they are * created. */ ChainEntry *entryChainTail; /* Other end of linked list of all entries in * the dictionary. Used for doing traversal of * the entries in the order that they are * created. */ int epoch; /* Epoch counter */ int refcount; /* Reference counter (see above) */ Tcl_Obj *chain; /* Linked list used for invalidating the * string representations of updated nested * dictionaries. */ } Dict; /* * The structure below defines the dictionary object type by means of * functions that can be invoked by generic object code. */ Tcl_ObjType tclDictType = { "dict", FreeDictInternalRep, /* freeIntRepProc */ DupDictInternalRep, /* dupIntRepProc */ UpdateStringOfDict, /* updateStringProc */ SetDictFromAny /* setFromAnyProc */ }; /* * The type of the specially adapted version of the Tcl_Obj*-containing hash * table defined in the tclObj.c code. This version differs in that it * allocates a bit more space in each hash entry in order to hold the pointers * used to keep the hash entries in a linked list. * * Note that this type of hash table is *only* suitable for direct use in * *this* file. Everything else should use the dict iterator API. */ static Tcl_HashKeyType chainHashType = { TCL_HASH_KEY_TYPE_VERSION, 0, TclHashObjKey, TclCompareObjKeys, AllocChainEntry, TclFreeObjEntry };  /***** START OF FUNCTIONS IMPLEMENTING DICT CORE API *****/ /* *---------------------------------------------------------------------- * * AllocChainEntry -- * * Allocate space for a Tcl_HashEntry containing the Tcl_Obj * key, and * which has a bit of extra space afterwards for storing pointers to the * rest of the chain of entries (the extra pointers are left NULL). * * Results: * The return value is a pointer to the created entry. * * Side effects: * Increments the reference count on the object. * *---------------------------------------------------------------------- */ static Tcl_HashEntry * AllocChainEntry( Tcl_HashTable *tablePtr, void *keyPtr) { Tcl_Obj *objPtr = keyPtr; ChainEntry *cPtr; cPtr = (ChainEntry *) ckalloc(sizeof(ChainEntry)); cPtr->entry.key.oneWordValue = (char *) objPtr; Tcl_IncrRefCount(objPtr); cPtr->entry.clientData = NULL; cPtr->prevPtr = cPtr->nextPtr = NULL; return &cPtr->entry; }  /* * Helper functions that disguise most of the details relating to how the * linked list of hash entries is managed. In particular, these manage the * creation of the table and initializing of the chain, the deletion of the * table and chain, the adding of an entry to the chain, and the removal of an * entry from the chain. */ static inline void InitChainTable( Dict *dict) { Tcl_InitCustomHashTable(&dict->table, TCL_CUSTOM_PTR_KEYS, &chainHashType); dict->entryChainHead = dict->entryChainTail = NULL; } static inline void DeleteChainTable( Dict *dict) { ChainEntry *cPtr; for (cPtr=dict->entryChainHead ; cPtr!=NULL ; cPtr=cPtr->nextPtr) { Tcl_Obj *valuePtr = Tcl_GetHashValue(&cPtr->entry); TclDecrRefCount(valuePtr); } Tcl_DeleteHashTable(&dict->table); } static inline Tcl_HashEntry * CreateChainEntry( Dict *dict, Tcl_Obj *keyPtr, int *newPtr) { ChainEntry *cPtr = (ChainEntry *) Tcl_CreateHashEntry(&dict->table, (char *) keyPtr, newPtr); /* * If this is a new entry in the hash table, stitch it into the chain. */ if (*newPtr) { cPtr->nextPtr = NULL; if (dict->entryChainHead == NULL) { cPtr->prevPtr = NULL; dict->entryChainHead = cPtr; dict->entryChainTail = cPtr; } else { cPtr->prevPtr = dict->entryChainTail; dict->entryChainTail->nextPtr = cPtr; dict->entryChainTail = cPtr; } } return &cPtr->entry; } static inline int DeleteChainEntry( Dict *dict, Tcl_Obj *keyPtr) { ChainEntry *cPtr = (ChainEntry *) Tcl_FindHashEntry(&dict->table, (char *) keyPtr); if (cPtr == NULL) { return 0; } else { Tcl_Obj *valuePtr = Tcl_GetHashValue(&cPtr->entry); TclDecrRefCount(valuePtr); } /* * Unstitch from the chain. */ if (cPtr->nextPtr) { cPtr->nextPtr->prevPtr = cPtr->prevPtr; } else { dict->entryChainTail = cPtr->prevPtr; } if (cPtr->prevPtr) { cPtr->prevPtr->nextPtr = cPtr->nextPtr; } else { dict->entryChainHead = cPtr->nextPtr; } Tcl_DeleteHashEntry(&cPtr->entry); return 1; }  /* *---------------------------------------------------------------------- * * DupDictInternalRep -- * * Initialize the internal representation of a dictionary Tcl_Obj to a * copy of the internal representation of an existing dictionary object. * * Results: * None. * * Side effects: * "srcPtr"s dictionary internal rep pointer should not be NULL and we * assume it is not NULL. We set "copyPtr"s internal rep to a pointer to * a newly allocated dictionary rep that, in turn, points to "srcPtr"s * key and value objects. Those objects are not actually copied but are * shared between "srcPtr" and "copyPtr". The ref count of each key and * value object is incremented. * *---------------------------------------------------------------------- */ static void DupDictInternalRep( Tcl_Obj *srcPtr, Tcl_Obj *copyPtr) { Dict *oldDict = srcPtr->internalRep.otherValuePtr; Dict *newDict = (Dict *) ckalloc(sizeof(Dict)); ChainEntry *cPtr; /* * Copy values across from the old hash table. */ InitChainTable(newDict); for (cPtr=oldDict->entryChainHead ; cPtr!=NULL ; cPtr=cPtr->nextPtr) { void *key = Tcl_GetHashKey(&oldDict->table, &cPtr->entry); Tcl_Obj *valuePtr = Tcl_GetHashValue(&cPtr->entry); int n; Tcl_HashEntry *hPtr = CreateChainEntry(newDict, key, &n); /* * Fill in the contents. */ Tcl_SetHashValue(hPtr, (ClientData) valuePtr); Tcl_IncrRefCount(valuePtr); } /* * Initialise other fields. */ newDict->epoch = 0; newDict->chain = NULL; newDict->refcount = 1; /* * Store in the object. */ copyPtr->internalRep.otherValuePtr = newDict; copyPtr->typePtr = &tclDictType; }  /* *---------------------------------------------------------------------- * * FreeDictInternalRep -- * * Deallocate the storage associated with a dictionary object's internal * representation. * * Results: * None * * Side effects: * Frees the memory holding the dictionary's internal hash table unless * it is locked by an iteration going over it. * *---------------------------------------------------------------------- */ static void FreeDictInternalRep( Tcl_Obj *dictPtr) { Dict *dict = dictPtr->internalRep.otherValuePtr; --dict->refcount; if (dict->refcount <= 0) { DeleteDict(dict); } dictPtr->internalRep.otherValuePtr = NULL; /* Belt and braces! */ }  /* *---------------------------------------------------------------------- * * DeleteDict -- * * Delete the structure that is used to implement a dictionary's internal * representation. Called when either the dictionary object loses its * internal representation or when the last iteration over the dictionary * completes. * * Results: * None * * Side effects: * Decrements the reference count of all key and value objects in the * dictionary, which may free them. * *---------------------------------------------------------------------- */ static void DeleteDict( Dict *dict) { DeleteChainTable(dict); ckfree((char *) dict); }  /* *---------------------------------------------------------------------- * * UpdateStringOfDict -- * * Update the string representation for a dictionary object. Note: This * function does not invalidate an existing old string rep so storage * will be lost if this has not already been done. This code is based on * UpdateStringOfList in tclListObj.c * * Results: * None. * * Side effects: * The object's string is set to a valid string that results from the * dict-to-string conversion. This string will be empty if the dictionary * has no key/value pairs. The dictionary internal representation should * not be NULL and we assume it is not NULL. * *---------------------------------------------------------------------- */ static void UpdateStringOfDict( Tcl_Obj *dictPtr) { #define LOCAL_SIZE 20 int localFlags[LOCAL_SIZE], *flagPtr; Dict *dict = dictPtr->internalRep.otherValuePtr; ChainEntry *cPtr; Tcl_Obj *keyPtr, *valuePtr; int numElems, i, length; char *elem, *dst; /* * This field is the most useful one in the whole hash structure, and it * is not exposed by any API function... */ numElems = dict->table.numEntries * 2; /* * Pass 1: estimate space, gather flags. */ if (numElems <= LOCAL_SIZE) { flagPtr = localFlags; } else { flagPtr = (int *) ckalloc((unsigned) numElems*sizeof(int)); } dictPtr->length = 1; for (i=0,cPtr=dict->entryChainHead; i<numElems; i+=2,cPtr=cPtr->nextPtr) { /* * Assume that cPtr is never NULL since we know the number of array * elements already. */ keyPtr = (Tcl_Obj *) Tcl_GetHashKey(&dict->table, &cPtr->entry); elem = TclGetStringFromObj(keyPtr, &length); dictPtr->length += Tcl_ScanCountedElement(elem, length, &flagPtr[i]) + 1; valuePtr = Tcl_GetHashValue(&cPtr->entry); elem = TclGetStringFromObj(valuePtr, &length); dictPtr->length += Tcl_ScanCountedElement(elem, length, &flagPtr[i+1]) + 1; } /* * Pass 2: copy into string rep buffer. */ dictPtr->bytes = ckalloc((unsigned) dictPtr->length); dst = dictPtr->bytes; for (i=0,cPtr=dict->entryChainHead; i<numElems; i+=2,cPtr=cPtr->nextPtr) { keyPtr = (Tcl_Obj *) Tcl_GetHashKey(&dict->table, &cPtr->entry); elem = TclGetStringFromObj(keyPtr, &length); dst += Tcl_ConvertCountedElement(elem, length, dst, flagPtr[i] | (i==0 ? 0 : TCL_DONT_QUOTE_HASH)); *(dst++) = ' '; valuePtr = Tcl_GetHashValue(&cPtr->entry); elem = TclGetStringFromObj(valuePtr, &length); dst += Tcl_ConvertCountedElement(elem, length, dst, flagPtr[i+1] | TCL_DONT_QUOTE_HASH); *(dst++) = ' '; } if (flagPtr != localFlags) { ckfree((char *) flagPtr); } if (dst == dictPtr->bytes) { *dst = 0; } else { *(--dst) = 0; } dictPtr->length = dst - dictPtr->bytes; }  /* *---------------------------------------------------------------------- * * SetDictFromAny -- * * Convert a non-dictionary object into a dictionary object. This code is * very closely related to SetListFromAny in tclListObj.c but does not * actually guarantee that a dictionary object will have a string rep (as * conversions from lists are handled with a special case.) * * Results: * A standard Tcl result. * * Side effects: * If the string can be converted, it loses any old internal * representation that it had and gains a dictionary's internalRep. * *---------------------------------------------------------------------- */ static int SetDictFromAny( Tcl_Interp *interp, Tcl_Obj *objPtr) { char *string, *s; const char *elemStart, *nextElem; int lenRemain, length, elemSize, hasBrace, result, isNew; char *limit; /* Points just after string's last byte. */ register const char *p; register Tcl_Obj *keyPtr, *valuePtr; Dict *dict; Tcl_HashEntry *hPtr; /* * Since lists and dictionaries have very closely-related string * representations (i.e. the same parsing code) we can safely special-case * the conversion from lists to dictionaries. */ if (objPtr->typePtr == &tclListType) { int objc, i; Tcl_Obj **objv; if (TclListObjGetElements(interp, objPtr, &objc, &objv) != TCL_OK) { return TCL_ERROR; } if (objc & 1) { if (interp != NULL) { Tcl_SetResult(interp, "missing value to go with key", TCL_STATIC); } return TCL_ERROR; } /* * 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. */ dict = (Dict *) ckalloc(sizeof(Dict)); InitChainTable(dict); for (i=0 ; i<objc ; i+=2) { /* * Store key and value in the hash table we're building. */ hPtr = CreateChainEntry(dict, objv[i], &isNew); if (!isNew) { Tcl_Obj *discardedValue = Tcl_GetHashValue(hPtr); TclDecrRefCount(discardedValue); } Tcl_SetHashValue(hPtr, objv[i+1]); Tcl_IncrRefCount(objv[i+1]); /* Since hash now holds ref to it */ } /* * Share type-setting code with the string-conversion case. */ goto installHash; } /* * Get the string representation. Make it up-to-date if necessary. */ string = TclGetStringFromObj(objPtr, &length); limit = (string + length); /* * Allocate a new HashTable that has objects for keys and objects for * values. */ dict = (Dict *) ckalloc(sizeof(Dict)); InitChainTable(dict); for (p = string, lenRemain = length; lenRemain > 0; p = nextElem, lenRemain = (limit - nextElem)) { result = TclFindElement(interp, p, lenRemain, &elemStart, &nextElem, &elemSize, &hasBrace); if (result != TCL_OK) { goto errorExit; } if (elemStart >= limit) { break; } /* * Allocate a Tcl object for the element and initialize it from the * "elemSize" bytes starting at "elemStart". */ s = ckalloc((unsigned) elemSize + 1); if (hasBrace) { memcpy(s, elemStart, (size_t) elemSize); s[elemSize] = 0; } else { elemSize = TclCopyAndCollapse(elemSize, elemStart, s); } TclNewObj(keyPtr); keyPtr->bytes = s; keyPtr->length = elemSize; p = nextElem; lenRemain = (limit - nextElem); if (lenRemain <= 0) { goto missingKey; } result = TclFindElement(interp, p, lenRemain, &elemStart, &nextElem, &elemSize, &hasBrace); if (result != TCL_OK) { TclDecrRefCount(keyPtr); goto errorExit; } if (elemStart >= limit) { goto missingKey; } /* * Allocate a Tcl object for the element and initialize it from the * "elemSize" bytes starting at "elemStart". */ s = ckalloc((unsigned) elemSize + 1); if (hasBrace) { memcpy((void *) s, (void *) elemStart, (size_t) elemSize); s[elemSize] = 0; } else { elemSize = TclCopyAndCollapse(elemSize, elemStart, s); } TclNewObj(valuePtr); valuePtr->bytes = s; valuePtr->length = elemSize; /* * Store key and value in the hash table we're building. */ hPtr = CreateChainEntry(dict, keyPtr, &isNew); if (!isNew) { Tcl_Obj *discardedValue = Tcl_GetHashValue(hPtr); TclDecrRefCount(keyPtr); TclDecrRefCount(discardedValue); } Tcl_SetHashValue(hPtr, valuePtr); Tcl_IncrRefCount(valuePtr); /* since hash now holds ref to it */ } installHash: /* * Free the old internalRep before setting the new one. We do this as late * as possible to allow the conversion code, in particular * Tcl_GetStringFromObj, to use that old internalRep. */ TclFreeIntRep(objPtr); dict->epoch = 0; dict->chain = NULL; dict->refcount = 1; objPtr->internalRep.otherValuePtr = dict; objPtr->typePtr = &tclDictType; return TCL_OK; missingKey: if (interp != NULL) { Tcl_SetResult(interp, "missing value to go with key", TCL_STATIC); } TclDecrRefCount(keyPtr); result = TCL_ERROR; errorExit: DeleteChainTable(dict); ckfree((char *) dict); return result; }  /* *---------------------------------------------------------------------- * * TclTraceDictPath -- * * Trace through a tree of dictionaries using the array of keys given. If * the flags argument has the DICT_PATH_UPDATE flag is set, a * backward-pointing chain of dictionaries is also built (in the Dict's * chain field) and the chained dictionaries are made into unshared * dictionaries (if they aren't already.) * * Results: * The object at the end of the path, or NULL if there was an error. Note * that this it is an error for an intermediate dictionary on the path to * not exist. If the flags argument has the DICT_PATH_EXISTS set, a * non-existent path gives a DICT_PATH_NON_EXISTENT result. * * Side effects: * If the flags argument is zero or DICT_PATH_EXISTS, there are no side * effects (other than potential conversion of objects to dictionaries.) * If the flags argument is DICT_PATH_UPDATE, the following additional * side effects occur. Shared dictionaries along the path are converted * into unshared objects, and a backward-pointing chain is built using * the chain fields of the dictionaries (for easy invalidation of string * representations using InvalidateDictChain). If the flags argument has * the DICT_PATH_CREATE bits set (and not the DICT_PATH_EXISTS bit), * non-existant keys will be inserted with a value of an empty * dictionary, resulting in the path being built. * *---------------------------------------------------------------------- */ Tcl_Obj * TclTraceDictPath( Tcl_Interp *interp, Tcl_Obj *dictPtr, int keyc, Tcl_Obj *const keyv[], int flags) { Dict *dict, *newDict; int i; if (dictPtr->typePtr != &tclDictType) { if (SetDictFromAny(interp, dictPtr) != TCL_OK) { return NULL; } } dict = dictPtr->internalRep.otherValuePtr; if (flags & DICT_PATH_UPDATE) { dict->chain = NULL; } for (i=0 ; i<keyc ; i++) { Tcl_HashEntry *hPtr = Tcl_FindHashEntry(&dict->table, (char *)keyv[i]); Tcl_Obj *tmpObj; if (hPtr == NULL) { int isNew; /* Dummy */ if (flags & DICT_PATH_EXISTS) { return DICT_PATH_NON_EXISTENT; } if ((flags & DICT_PATH_CREATE) != DICT_PATH_CREATE) { if (interp != NULL) { Tcl_ResetResult(interp); Tcl_AppendResult(interp, "key \"", TclGetString(keyv[i]), "\" not known in dictionary", NULL); Tcl_SetErrorCode(interp, "TCL", "LOOKUP", "DICT", TclGetString(keyv[i]), NULL); } return NULL; } /* * The next line should always set isNew to 1. */ hPtr = CreateChainEntry(dict, keyv[i], &isNew); tmpObj = Tcl_NewDictObj(); Tcl_IncrRefCount(tmpObj); Tcl_SetHashValue(hPtr, tmpObj); } else { tmpObj = Tcl_GetHashValue(hPtr); if (tmpObj->typePtr != &tclDictType) { if (SetDictFromAny(interp, tmpObj) != TCL_OK) { return NULL; } } } newDict = tmpObj->internalRep.otherValuePtr; if (flags & DICT_PATH_UPDATE) { if (Tcl_IsShared(tmpObj)) { TclDecrRefCount(tmpObj); tmpObj = Tcl_DuplicateObj(tmpObj); Tcl_IncrRefCount(tmpObj); Tcl_SetHashValue(hPtr, (ClientData) tmpObj); dict->epoch++; newDict = tmpObj->internalRep.otherValuePtr; } newDict->chain = dictPtr; } dict = newDict; dictPtr = tmpObj; } return dictPtr; }  /* *---------------------------------------------------------------------- * * InvalidateDictChain -- * * Go through a dictionary chain (built by an updating invokation of * TclTraceDictPath) and invalidate the string representations of all the * dictionaries on the chain. * * Results: * None * * Side effects: * String reps are invalidated and epoch counters (for detecting illegal * concurrent modifications) are updated through the chain of updated * dictionaries. * *---------------------------------------------------------------------- */ static void InvalidateDictChain( Tcl_Obj *dictObj) { Dict *dict = dictObj->internalRep.otherValuePtr; do { Tcl_InvalidateStringRep(dictObj); dict->epoch++; dictObj = dict->chain; if (dictObj == NULL) { break; } dict->chain = NULL; dict = dictObj->internalRep.otherValuePtr; } while (dict != NULL); }  /* *---------------------------------------------------------------------- * * Tcl_DictObjPut -- * * Add a key,value pair to a dictionary, or update the value for a key if * that key already has a mapping in the dictionary. * * Results: * A standard Tcl result. * * Side effects: * The object pointed to by dictPtr is converted to a dictionary if it is * not already one, and any string representation that it has is * invalidated. * *---------------------------------------------------------------------- */ int Tcl_DictObjPut( Tcl_Interp *interp, Tcl_Obj *dictPtr, Tcl_Obj *keyPtr, Tcl_Obj *valuePtr) { Dict *dict; Tcl_HashEntry *hPtr; int isNew; if (Tcl_IsShared(dictPtr)) { Tcl_Panic("%s called with shared object", "Tcl_DictObjPut"); } if (dictPtr->typePtr != &tclDictType) { int result = SetDictFromAny(interp, dictPtr); if (result != TCL_OK) { return result; } } if (dictPtr->bytes != NULL) { Tcl_InvalidateStringRep(dictPtr); } dict = dictPtr->internalRep.otherValuePtr; hPtr = CreateChainEntry(dict, keyPtr, &isNew); Tcl_IncrRefCount(valuePtr); if (!isNew) { Tcl_Obj *oldValuePtr = Tcl_GetHashValue(hPtr); TclDecrRefCount(oldValuePtr); } Tcl_SetHashValue(hPtr, valuePtr); dict->epoch++; return TCL_OK; }  /* *---------------------------------------------------------------------- * * Tcl_DictObjGet -- * * Given a key, get its value from the dictionary (or NULL if key is not * found in dictionary.) * * Results: * A standard Tcl result. The variable pointed to by valuePtrPtr is * updated with the value for the key. Note that it is not an error for * the key to have no mapping in the dictionary. * * Side effects: * The object pointed to by dictPtr is converted to a dictionary if it is * not already one. * *---------------------------------------------------------------------- */ int Tcl_DictObjGet( Tcl_Interp *interp, Tcl_Obj *dictPtr, Tcl_Obj *keyPtr, Tcl_Obj **valuePtrPtr) { Dict *dict; Tcl_HashEntry *hPtr; if (dictPtr->typePtr != &tclDictType) { int result = SetDictFromAny(interp, dictPtr); if (result != TCL_OK) { return result; } } dict = dictPtr->internalRep.otherValuePtr; hPtr = Tcl_FindHashEntry(&dict->table, (char *) keyPtr); if (hPtr == NULL) { *valuePtrPtr = NULL; } else { *valuePtrPtr = Tcl_GetHashValue(hPtr); } return TCL_OK; }  /* *---------------------------------------------------------------------- * * Tcl_DictObjRemove -- * * Remove the key,value pair with the given key from the dictionary; the * key does not need to be present in the dictionary. * * Results: * A standard Tcl result. * * Side effects: * The object pointed to by dictPtr is converted to a dictionary if it is * not already one, and any string representation that it has is * invalidated. * *---------------------------------------------------------------------- */ int Tcl_DictObjRemove( Tcl_Interp *interp, Tcl_Obj *dictPtr, Tcl_Obj *keyPtr) { Dict *dict; if (Tcl_IsShared(dictPtr)) { Tcl_Panic("%s called with shared object", "Tcl_DictObjRemove"); } if (dictPtr->typePtr != &tclDictType) { int result = SetDictFromAny(interp, dictPtr); if (result != TCL_OK) { return result; } } if (dictPtr->bytes != NULL) { Tcl_InvalidateStringRep(dictPtr); } dict = dictPtr->internalRep.otherValuePtr; if (DeleteChainEntry(dict, keyPtr)) { dict->epoch++; } return TCL_OK; }  /* *---------------------------------------------------------------------- * * Tcl_DictObjSize -- * * How many key,value pairs are there in the dictionary? * * Results: * A standard Tcl result. Updates the variable pointed to by sizePtr with * the number of key,value pairs in the dictionary. * * Side effects: * The dictPtr object is converted to a dictionary type if it is not a * dictionary already. * *---------------------------------------------------------------------- */ int Tcl_DictObjSize( Tcl_Interp *interp, Tcl_Obj *dictPtr, int *sizePtr) { Dict *dict; if (dictPtr->typePtr != &tclDictType) { int result = SetDictFromAny(interp, dictPtr); if (result != TCL_OK) { return result; } } dict = dictPtr->internalRep.otherValuePtr; *sizePtr = dict->table.numEntries; return TCL_OK; }  /* *---------------------------------------------------------------------- * * Tcl_DictObjFirst -- * * Start a traversal of the dictionary. Caller must supply the search * context, pointers for returning key and value, and a pointer to allow * indication of whether the dictionary has been traversed (i.e. the * dictionary is empty). The order of traversal is undefined. * * Results: * A standard Tcl result. Updates the variables pointed to by keyPtrPtr, * valuePtrPtr and donePtr. Either of keyPtrPtr and valuePtrPtr may be * NULL, in which case the key/value is not made available to the caller. * * Side effects: * The dictPtr object is converted to a dictionary type if it is not a * dictionary already. The search context is initialised if the search * has not finished. The dictionary's internal rep is Tcl_Preserve()d if * the dictionary has at least one element. * *---------------------------------------------------------------------- */ int Tcl_DictObjFirst( Tcl_Interp *interp, /* For error messages, or NULL if no error * messages desired. */ Tcl_Obj *dictPtr, /* Dictionary to traverse. */ Tcl_DictSearch *searchPtr, /* Pointer to a dict search context. */ Tcl_Obj **keyPtrPtr, /* Pointer to a variable to have the first key * written into, or NULL. */ Tcl_Obj **valuePtrPtr, /* Pointer to a variable to have the first * value written into, or NULL.*/ int *donePtr) /* Pointer to a variable which will have a 1 * written into when there are no further * values in the dictionary, or a 0 * otherwise. */ { Dict *dict; ChainEntry *cPtr; if (dictPtr->typePtr != &tclDictType) { int result = SetDictFromAny(interp, dictPtr); if (result != TCL_OK) { return result; } } dict = dictPtr->internalRep.otherValuePtr; cPtr = dict->entryChainHead; if (cPtr == NULL) { searchPtr->epoch = -1; *donePtr = 1; } else { *donePtr = 0; searchPtr->dictionaryPtr = (Tcl_Dict) dict; searchPtr->epoch = dict->epoch; searchPtr->next = cPtr->nextPtr; dict->refcount++; if (keyPtrPtr != NULL) { *keyPtrPtr = (Tcl_Obj *) Tcl_GetHashKey(&dict->table, &cPtr->entry); } if (valuePtrPtr != NULL) { *valuePtrPtr = Tcl_GetHashValue(&cPtr->entry); } } return TCL_OK; }  /* *---------------------------------------------------------------------- * * Tcl_DictObjNext -- * * Continue a traversal of a dictionary previously started with * Tcl_DictObjFirst. This function is safe against concurrent * modification of the underlying object (including type shimmering), * treating such situations as if the search has terminated, though it is * up to the caller to ensure that the object itself is not disposed * until the search has finished. It is _not_ safe against modifications * from other threads. * * Results: * Updates the variables pointed to by keyPtrPtr, valuePtrPtr and * donePtr. Either of keyPtrPtr and valuePtrPtr may be NULL, in which * case the key/value is not made available to the caller. * * Side effects: * Removes a reference to the dictionary's internal rep if the search * terminates. * *---------------------------------------------------------------------- */ void Tcl_DictObjNext( Tcl_DictSearch *searchPtr, /* Pointer to a hash search context. */ Tcl_Obj **keyPtrPtr, /* Pointer to a variable to have the first key * written into, or NULL. */ Tcl_Obj **valuePtrPtr, /* Pointer to a variable to have the first * value written into, or NULL.*/ int *donePtr) /* Pointer to a variable which will have a 1 * written into when there are no further * values in the dictionary, or a 0 * otherwise. */ { ChainEntry *cPtr; /* * If the searh is done; we do no work. */ if (searchPtr->epoch == -1) { *donePtr = 1; return; } /* * Bail out if the dictionary has had any elements added, modified or * removed. This *shouldn't* happen, but... */ if (((Dict *)searchPtr->dictionaryPtr)->epoch != searchPtr->epoch) { Tcl_Panic("concurrent dictionary modification and search"); } cPtr = searchPtr->next; if (cPtr == NULL) { Tcl_DictObjDone(searchPtr); *donePtr = 1; return; } searchPtr->next = cPtr->nextPtr; *donePtr = 0; if (keyPtrPtr != NULL) { *keyPtrPtr = (Tcl_Obj *) Tcl_GetHashKey( &((Dict *)searchPtr->dictionaryPtr)->table, &cPtr->entry); } if (valuePtrPtr != NULL) { *valuePtrPtr = Tcl_GetHashValue(&cPtr->entry); } }  /* *---------------------------------------------------------------------- * * Tcl_DictObjDone -- * * Call this if you want to stop a search before you reach the end of the * dictionary (e.g. because of abnormal termination of the search). It * need not be used if the search reaches its natural end (i.e. if either * Tcl_DictObjFirst or Tcl_DictObjNext sets its donePtr variable to 1). * * Results: * None. * * Side effects: * Removes a reference to the dictionary's internal rep. * *---------------------------------------------------------------------- */ void Tcl_DictObjDone( Tcl_DictSearch *searchPtr) /* Pointer to a hash search context. */ { Dict *dict; if (searchPtr->epoch != -1) { searchPtr->epoch = -1; dict = (Dict *) searchPtr->dictionaryPtr; dict->refcount--; if (dict->refcount <= 0) { DeleteDict(dict); } } }  /* *---------------------------------------------------------------------- * * Tcl_DictObjPutKeyList -- * * Add a key...key,value pair to a dictionary tree. The main dictionary * value must not be shared, though sub-dictionaries may be. All * intermediate dictionaries on the path must exist. * * Results: * A standard Tcl result. Note that in the error case, a message is left * in interp unless that is NULL. * * Side effects: * If the dictionary and any of its sub-dictionaries on the path have * string representations, these are invalidated. * *---------------------------------------------------------------------- */ int Tcl_DictObjPutKeyList( Tcl_Interp *interp, Tcl_Obj *dictPtr, int keyc, Tcl_Obj *const keyv[], Tcl_Obj *valuePtr) { Dict *dict; Tcl_HashEntry *hPtr; int isNew; if (Tcl_IsShared(dictPtr)) { Tcl_Panic("%s called with shared object", "Tcl_DictObjPutKeyList"); } if (keyc < 1) { Tcl_Panic("%s called with empty key list", "Tcl_DictObjPutKeyList"); } dictPtr = TclTraceDictPath(interp, dictPtr, keyc-1,keyv, DICT_PATH_CREATE); if (dictPtr == NULL) { return TCL_ERROR; } dict = dictPtr->internalRep.otherValuePtr; hPtr = CreateChainEntry(dict, keyv[keyc-1], &isNew); Tcl_IncrRefCount(valuePtr); if (!isNew) { Tcl_Obj *oldValuePtr = Tcl_GetHashValue(hPtr); TclDecrRefCount(oldValuePtr); } Tcl_SetHashValue(hPtr, valuePtr); InvalidateDictChain(dictPtr); return TCL_OK; }  /* *---------------------------------------------------------------------- * * Tcl_DictObjRemoveKeyList -- * * Remove a key...key,value pair from a dictionary tree (the value * removed is implicit in the key path). The main dictionary value must * not be shared, though sub-dictionaries may be. It is not an error if * there is no value associated with the given key list, but all * intermediate dictionaries on the key path must exist. * * Results: * A standard Tcl result. Note that in the error case, a message is left * in interp unless that is NULL. * * Side effects: * If the dictionary and any of its sub-dictionaries on the key path have * string representations, these are invalidated. * *---------------------------------------------------------------------- */ int Tcl_DictObjRemoveKeyList( Tcl_Interp *interp, Tcl_Obj *dictPtr, int keyc, Tcl_Obj *const keyv[]) { Dict *dict; if (Tcl_IsShared(dictPtr)) { Tcl_Panic("%s called with shared object", "Tcl_DictObjRemoveKeyList"); } if (keyc < 1) { Tcl_Panic("%s called with empty key list", "Tcl_DictObjRemoveKeyList"); } dictPtr = TclTraceDictPath(interp, dictPtr, keyc-1,keyv, DICT_PATH_UPDATE); if (dictPtr == NULL) { return TCL_ERROR; } dict = dictPtr->internalRep.otherValuePtr; DeleteChainEntry(dict, keyv[keyc-1]); InvalidateDictChain(dictPtr); return TCL_OK; }  /* *---------------------------------------------------------------------- * * Tcl_NewDictObj -- * * This function is normally called when not debugging: i.e., when * TCL_MEM_DEBUG is not defined. It creates a new dict object without any * content. * * When TCL_MEM_DEBUG is defined, this function just returns the result * of calling the debugging version Tcl_DbNewDictObj. * * Results: * A new dict object is returned; it has no keys defined in it. The new * object's string representation is left NULL, and the ref count of the * object is 0. * * Side Effects: * None. * *---------------------------------------------------------------------- */ Tcl_Obj * Tcl_NewDictObj(void) { #ifdef TCL_MEM_DEBUG return Tcl_DbNewDictObj("unknown", 0); #else /* !TCL_MEM_DEBUG */ Tcl_Obj *dictPtr; Dict *dict; TclNewObj(dictPtr); Tcl_InvalidateStringRep(dictPtr); dict = (Dict *) ckalloc(sizeof(Dict)); InitChainTable(dict); dict->epoch = 0; dict->chain = NULL; dict->refcount = 1; dictPtr->internalRep.otherValuePtr = dict; dictPtr->typePtr = &tclDictType; return dictPtr; #endif }  /* *---------------------------------------------------------------------- * * Tcl_DbNewDictObj -- * * This function is normally called when debugging: i.e., when * TCL_MEM_DEBUG is defined. It creates new dict objects. It is the same * as the Tcl_NewDictObj function above except that it calls * Tcl_DbCkalloc directly with the file name and line number from its * caller. This simplifies debugging since then the [memory active] * command will report the correct file name and line number when * reporting objects that haven't been freed. * * When TCL_MEM_DEBUG is not defined, this function just returns the * result of calling Tcl_NewDictObj. * * Results: * A new dict object is returned; it has no keys defined in it. The new * object's string representation is left NULL, and the ref count of the * object is 0. * * Side Effects: * None. * *---------------------------------------------------------------------- */ Tcl_Obj * Tcl_DbNewDictObj( const char *file, int line) { #ifdef TCL_MEM_DEBUG Tcl_Obj *dictPtr; Dict *dict; TclDbNewObj(dictPtr, file, line); Tcl_InvalidateStringRep(dictPtr); dict = (Dict *) ckalloc(sizeof(Dict)); InitChainTable(dict); dict->epoch = 0; dict->chain = NULL; dict->refcount = 1; dictPtr->internalRep.otherValuePtr = dict; dictPtr->typePtr = &tclDictType; return dictPtr; #else /* !TCL_MEM_DEBUG */ return Tcl_NewDictObj(); #endif }  /***** START OF FUNCTIONS IMPLEMENTING TCL COMMANDS *****/ /* *---------------------------------------------------------------------- * * DictCreateCmd -- * * This function implements the "dict create" Tcl command. See the user * documentation for details on what it does, and TIP#111 for the formal * specification. * * Results: * A standard Tcl result. * * Side effects: * See the user documentation. * *---------------------------------------------------------------------- */ static int DictCreateCmd( ClientData dummy, Tcl_Interp *interp, int objc, Tcl_Obj *const *objv) { Tcl_Obj *dictObj; int i; /* * Must have an even number of arguments; note that number of preceding * arguments (i.e. "dict create" is also even, which makes this much * easier.) */ if ((objc & 1) == 0) { Tcl_WrongNumArgs(interp, 1, objv, "?key value ...?"); return TCL_ERROR; } dictObj = Tcl_NewDictObj(); for (i=1 ; i<objc ; i+=2) { /* * The next command is assumed to never fail... */ Tcl_DictObjPut(interp, dictObj, objv[i], objv[i+1]); } Tcl_SetObjResult(interp, dictObj); return TCL_OK; }  /* *---------------------------------------------------------------------- * * DictGetCmd -- * * This function implements the "dict get" Tcl command. See the user * documentation for details on what it does, and TIP#111 for the formal * specification. * * Results: * A standard Tcl result. * * Side effects: * See the user documentation. * *---------------------------------------------------------------------- */ static int DictGetCmd( ClientData dummy, Tcl_Interp *interp, int objc, Tcl_Obj *const *objv) { Tcl_Obj *dictPtr, *valuePtr = NULL; int result; if (objc < 2) { Tcl_WrongNumArgs(interp, 1, objv, "dictionary ?key key ...?"); return TCL_ERROR; } /* * Test for the special case of no keys, which returns a *list* of all * key,value pairs. We produce a copy here because that makes subsequent * list handling more efficient. */ if (objc == 2) { Tcl_Obj *keyPtr, *listPtr; Tcl_DictSearch search; int done; result = Tcl_DictObjFirst(interp, objv[1], &search, &keyPtr, &valuePtr, &done); if (result != TCL_OK) { return result; } listPtr = Tcl_NewListObj(0, NULL); while (!done) { /* * Assume these won't fail as we have complete control over the * types of things here. */ Tcl_ListObjAppendElement(interp, listPtr, keyPtr); Tcl_ListObjAppendElement(interp, listPtr, valuePtr); Tcl_DictObjNext(&search, &keyPtr, &valuePtr, &done); } Tcl_SetObjResult(interp, listPtr); return TCL_OK; } /* * Loop through the list of keys, looking up the key at the current index * in the current dictionary each time. Once we've done the lookup, we set * the current dictionary to be the value we looked up (in case the value * was not the last one and we are going through a chain of searches.) * Note that this loop always executes at least once. */ dictPtr = TclTraceDictPath(interp, objv[1], objc-3,objv+2, DICT_PATH_READ); if (dictPtr == NULL) { return TCL_ERROR; } result = Tcl_DictObjGet(interp, dictPtr, objv[objc-1], &valuePtr); if (result != TCL_OK) { return result; } if (valuePtr == NULL) { Tcl_ResetResult(interp); Tcl_AppendResult(interp, "key \"", TclGetString(objv[objc-1]), "\" not known in dictionary", NULL); return TCL_ERROR; } Tcl_SetObjResult(interp, valuePtr); return TCL_OK; }  /* *---------------------------------------------------------------------- * * DictReplaceCmd -- * * This function implements the "dict replace" Tcl command. See the user * documentation for details on what it does, and TIP#111 for the formal * specification. * * Results: * A standard Tcl result. * * Side effects: * See the user documentation. * *---------------------------------------------------------------------- */ static int DictReplaceCmd( ClientData dummy, Tcl_Interp *interp, int objc, Tcl_Obj *const *objv) { Tcl_Obj *dictPtr; int i, result; int allocatedDict = 0; if ((objc < 2) || (objc & 1)) { Tcl_WrongNumArgs(interp, 1, objv, "dictionary ?key value ...?"); return TCL_ERROR; } dictPtr = objv[1]; if (Tcl_IsShared(dictPtr)) { dictPtr = Tcl_DuplicateObj(dictPtr); allocatedDict = 1; } for (i=2 ; i<objc ; i+=2) { result = Tcl_DictObjPut(interp, dictPtr, objv[i], objv[i+1]); if (result != TCL_OK) { if (allocatedDict) { TclDecrRefCount(dictPtr); } return TCL_ERROR; } } Tcl_SetObjResult(interp, dictPtr); return TCL_OK; }  /* *---------------------------------------------------------------------- * * DictRemoveCmd -- * * This function implements the "dict remove" Tcl command. See the user * documentation for details on what it does, and TIP#111 for the formal * specification. * * Results: * A standard Tcl result. * * Side effects: * See the user documentation. * *---------------------------------------------------------------------- */ static int DictRemoveCmd( ClientData dummy, Tcl_Interp *interp, int objc, Tcl_Obj *const *objv) { Tcl_Obj *dictPtr; int i, result; int allocatedDict = 0; if (objc < 2) { Tcl_WrongNumArgs(interp, 1, objv, "dictionary ?key ...?"); return TCL_ERROR; } dictPtr = objv[1]; if (Tcl_IsShared(dictPtr)) { dictPtr = Tcl_DuplicateObj(dictPtr); allocatedDict = 1; } for (i=2 ; i<objc ; i++) { result = Tcl_DictObjRemove(interp, dictPtr, objv[i]); if (result != TCL_OK) { if (allocatedDict) { TclDecrRefCount(dictPtr); } return TCL_ERROR; } } Tcl_SetObjResult(interp, dictPtr); return TCL_OK; }  /* *---------------------------------------------------------------------- * * DictMergeCmd -- * * This function implements the "dict merge" Tcl command. See the user * documentation for details on what it does, and TIP#163 for the formal * specification. * * Results: * A standard Tcl result. * * Side effects: * See the user documentation. * *---------------------------------------------------------------------- */ static int DictMergeCmd( ClientData dummy, Tcl_Interp *interp, int objc, Tcl_Obj *const *objv) { Tcl_Obj *targetObj, *keyObj, *valueObj; int allocatedDict = 0; int i, done; Tcl_DictSearch search; if (objc == 1) { /* * No dictionary arguments; return default (empty value). */ return TCL_OK; } /* * Make sure first argument is a dictionary. */ targetObj = objv[1]; if (targetObj->typePtr != &tclDictType) { if (SetDictFromAny(interp, targetObj) != TCL_OK) { return TCL_ERROR; } } if (objc == 2) { /* * Single argument, return it. */ Tcl_SetObjResult(interp, objv[1]); return TCL_OK; } /* * Normal behaviour: combining two (or more) dictionaries. */ if (Tcl_IsShared(targetObj)) { targetObj = Tcl_DuplicateObj(targetObj); allocatedDict = 1; } for (i=2 ; i<objc ; i++) { if (Tcl_DictObjFirst(interp, objv[i], &search, &keyObj, &valueObj, &done) != TCL_OK) { if (allocatedDict) { TclDecrRefCount(targetObj); } return TCL_ERROR; } while (!done) { /* * Next line can't fail; already know we have a dictionary in * targetObj. */ Tcl_DictObjPut(NULL, targetObj, keyObj, valueObj); Tcl_DictObjNext(&search, &keyObj, &valueObj, &done); } Tcl_DictObjDone(&search); } Tcl_SetObjResult(interp, targetObj); return TCL_OK; }  /* *---------------------------------------------------------------------- * * DictKeysCmd -- * * This function implements the "dict keys" Tcl command. See the user * documentation for details on what it does, and TIP#111 for the formal * specification. * * Results: * A standard Tcl result. * * Side effects: * See the user documentation. * *---------------------------------------------------------------------- */ static int DictKeysCmd( ClientData dummy, Tcl_Interp *interp, int objc, Tcl_Obj *const *objv) { Tcl_Obj *listPtr; char *pattern = NULL; if (objc!=2 && objc!=3) { Tcl_WrongNumArgs(interp, 1, objv, "dictionary ?pattern?"); return TCL_ERROR; } /* * A direct check that we have a dictionary. We don't start the iteration * yet because that might allocate memory or set locks that we do not * need. [Bug 1705778, leak K04] */ if (objv[1]->typePtr != &tclDictType) { int result = SetDictFromAny(interp, objv[1]); if (result != TCL_OK) { return result; } } if (objc == 3) { pattern = TclGetString(objv[2]); } listPtr = Tcl_NewListObj(0, NULL); if ((pattern != NULL) && TclMatchIsTrivial(pattern)) { Tcl_Obj *valuePtr = NULL; Tcl_DictObjGet(interp, objv[1], objv[2], &valuePtr); if (valuePtr != NULL) { Tcl_ListObjAppendElement(NULL, listPtr, objv[2]); } } else { Tcl_DictSearch search; Tcl_Obj *keyPtr; int done; /* * At this point, we know we have a dictionary (or at least something * that can be represented; it could theoretically have shimmered away * when the pattern was fetched, but that shouldn't be damaging) so we * can start the iteration process without checking for failures. */ Tcl_DictObjFirst(NULL, objv[1], &search, &keyPtr, NULL, &done); for (; !done ; Tcl_DictObjNext(&search, &keyPtr, NULL, &done)) { if (!pattern || Tcl_StringMatch(TclGetString(keyPtr), pattern)) { Tcl_ListObjAppendElement(NULL, listPtr, keyPtr); } } Tcl_DictObjDone(&search); } Tcl_SetObjResult(interp, listPtr); return TCL_OK; }  /* *---------------------------------------------------------------------- * * DictValuesCmd -- * * This function implements the "dict values" Tcl command. See the user * documentation for details on what it does, and TIP#111 for the formal * specification. * * Results: * A standard Tcl result. * * Side effects: * See the user documentation. * *---------------------------------------------------------------------- */ static int DictValuesCmd( ClientData dummy, Tcl_Interp *interp, int objc, Tcl_Obj *const *objv) { Tcl_Obj *valuePtr, *listPtr; Tcl_DictSearch search; int done; char *pattern; if (objc!=2 && objc!=3) { Tcl_WrongNumArgs(interp, 1, objv, "dictionary ?pattern?"); return TCL_ERROR; } if (Tcl_DictObjFirst(interp, objv[1], &search, NULL, &valuePtr, &done) != TCL_OK) { return TCL_ERROR; } if (objc == 3) { pattern = TclGetString(objv[2]); } else { pattern = NULL; } listPtr = Tcl_NewListObj(0, NULL); for (; !done ; Tcl_DictObjNext(&search, NULL, &valuePtr, &done)) { if (pattern==NULL || Tcl_StringMatch(TclGetString(valuePtr),pattern)) { /* * Assume this operation always succeeds. */ Tcl_ListObjAppendElement(interp, listPtr, valuePtr); } } Tcl_DictObjDone(&search); Tcl_SetObjResult(interp, listPtr); return TCL_OK; }  /* *---------------------------------------------------------------------- * * DictSizeCmd -- * * This function implements the "dict size" Tcl command. See the user * documentation for details on what it does, and TIP#111 for the formal * specification. * * Results: * A standard Tcl result. * * Side effects: * See the user documentation. * *---------------------------------------------------------------------- */ static int DictSizeCmd( ClientData dummy, Tcl_Interp *interp, int objc, Tcl_Obj *const *objv) { int result, size; if (objc != 2) { Tcl_WrongNumArgs(interp, 1, objv, "dictionary"); return TCL_ERROR; } result = Tcl_DictObjSize(interp, objv[1], &size); if (result == TCL_OK) { Tcl_SetObjResult(interp, Tcl_NewIntObj(size)); } return result; }  /* *---------------------------------------------------------------------- * * DictExistsCmd -- * * This function implements the "dict exists" Tcl command. See the user * documentation for details on what it does, and TIP#111 for the formal * specification. * * Results: * A standard Tcl result. * * Side effects: * See the user documentation. * *---------------------------------------------------------------------- */ static int DictExistsCmd( ClientData dummy, Tcl_Interp *interp, int objc, Tcl_Obj *const *objv) { Tcl_Obj *dictPtr, *valuePtr; int result; if (objc < 3) { Tcl_WrongNumArgs(interp, 1, objv, "dictionary key ?key ...?"); return TCL_ERROR; } dictPtr = TclTraceDictPath(interp, objv[1], objc-3, objv+2, DICT_PATH_EXISTS); if (dictPtr == NULL) { return TCL_ERROR; } if (dictPtr == DICT_PATH_NON_EXISTENT) { Tcl_SetObjResult(interp, Tcl_NewBooleanObj(0)); return TCL_OK; } result = Tcl_DictObjGet(interp, dictPtr, objv[objc-1], &valuePtr); if (result != TCL_OK) { return result; } Tcl_SetObjResult(interp, Tcl_NewBooleanObj(valuePtr != NULL)); return TCL_OK; }  /* *---------------------------------------------------------------------- * * DictInfoCmd -- * * This function implements the "dict info" Tcl command. See the user * documentation for details on what it does, and TIP#111 for the formal * specification. * * Results: * A standard Tcl result. * * Side effects: * See the user documentation. * *---------------------------------------------------------------------- */ static int DictInfoCmd( ClientData dummy, Tcl_Interp *interp, int objc, Tcl_Obj *const *objv) { Tcl_Obj *dictPtr; Dict *dict; if (objc != 2) { Tcl_WrongNumArgs(interp, 1, objv, "dictionary"); return TCL_ERROR; } dictPtr = objv[1]; if (dictPtr->typePtr != &tclDictType) { int result = SetDictFromAny(interp, dictPtr); if (result != TCL_OK) { return result; } } dict = dictPtr->internalRep.otherValuePtr; /* * This next cast is actually OK. */ Tcl_SetResult(interp, (char *) Tcl_HashStats(&dict->table), TCL_DYNAMIC); return TCL_OK; }  /* *---------------------------------------------------------------------- * * DictIncrCmd -- * * This function implements the "dict incr" Tcl command. See the user * documentation for details on what it does, and TIP#111 for the formal * specification. * * Results: * A standard Tcl result. * * Side effects: * See the user documentation. * *---------------------------------------------------------------------- */ static int DictIncrCmd( ClientData dummy, Tcl_Interp *interp, int objc, Tcl_Obj *const *objv) { int code = TCL_OK; Tcl_Obj *dictPtr, *valuePtr = NULL; if (objc < 3 || objc > 4) { Tcl_WrongNumArgs(interp, 1, objv, "varName key ?increment?"); return TCL_ERROR; } dictPtr = Tcl_ObjGetVar2(interp, objv[1], NULL, 0); if (dictPtr == NULL) { /* * Variable didn't yet exist. Create new dictionary value. */ dictPtr = Tcl_NewDictObj(); } else if (Tcl_DictObjGet(interp, dictPtr, objv[2], &valuePtr) != TCL_OK) { /* * Variable contents are not a dict, report error. */ return TCL_ERROR; } if (Tcl_IsShared(dictPtr)) { /* * A little internals surgery to avoid copying a string rep that will * soon be no good. */ char *saved = dictPtr->bytes; dictPtr->bytes = NULL; dictPtr = Tcl_DuplicateObj(dictPtr); dictPtr->bytes = saved; } if (valuePtr == NULL) { /* * Key not in dictionary. Create new key with increment as value. */ if (objc == 4) { /* * Verify increment is an integer. */ mp_int increment; code = Tcl_GetBignumFromObj(interp, objv[3], &increment); if (code != TCL_OK) { Tcl_AddErrorInfo(interp, "\n (reading increment)"); } else { Tcl_DictObjPut(interp, dictPtr, objv[2], objv[3]); } } else { Tcl_DictObjPut(interp, dictPtr, objv[2], Tcl_NewIntObj(1)); } } else { /* * Key in dictionary. Increment its value with minimum dup. */ if (Tcl_IsShared(valuePtr)) { valuePtr = Tcl_DuplicateObj(valuePtr); Tcl_DictObjPut(interp, dictPtr, objv[2], valuePtr); } if (objc == 4) { code = TclIncrObj(interp, valuePtr, objv[3]); } else { Tcl_Obj *incrPtr = Tcl_NewIntObj(1); Tcl_IncrRefCount(incrPtr); code = TclIncrObj(interp, valuePtr, incrPtr); Tcl_DecrRefCount(incrPtr); } } if (code == TCL_OK) { Tcl_InvalidateStringRep(dictPtr); valuePtr = Tcl_ObjSetVar2(interp, objv[1], NULL, dictPtr, TCL_LEAVE_ERR_MSG); if (valuePtr == NULL) { code = TCL_ERROR; } else { Tcl_SetObjResult(interp, valuePtr); } } else if (dictPtr->refCount == 0) { Tcl_DecrRefCount(dictPtr); } return code; }  /* *---------------------------------------------------------------------- * * DictLappendCmd -- * * This function implements the "dict lappend" Tcl command. See the user * documentation for details on what it does, and TIP#111 for the formal * specification. * * Results: * A standard Tcl result. * * Side effects: * See the user documentation. * *---------------------------------------------------------------------- */ static int DictLappendCmd( ClientData dummy, Tcl_Interp *interp, int objc, Tcl_Obj *const *objv) { Tcl_Obj *dictPtr, *valuePtr, *resultPtr; int i, allocatedDict = 0, allocatedValue = 0; if (objc < 3) { Tcl_WrongNumArgs(interp, 1, objv, "varName key ?value ...?"); return TCL_ERROR; } dictPtr = Tcl_ObjGetVar2(interp, objv[1], NULL, 0); if (dictPtr == NULL) { allocatedDict = 1; dictPtr = Tcl_NewDictObj(); } else if (Tcl_IsShared(dictPtr)) { allocatedDict = 1; dictPtr = Tcl_DuplicateObj(dictPtr); } if (Tcl_DictObjGet(interp, dictPtr, objv[2], &valuePtr) != TCL_OK) { if (allocatedDict) { TclDecrRefCount(dictPtr); } return TCL_ERROR; } if (valuePtr == NULL) { valuePtr = Tcl_NewListObj(objc-3, objv+3); allocatedValue = 1; } else { if (Tcl_IsShared(valuePtr)) { allocatedValue = 1; valuePtr = Tcl_DuplicateObj(valuePtr); } for (i=3 ; i<objc ; i++) { if (Tcl_ListObjAppendElement(interp, valuePtr, objv[i]) != TCL_OK) { if (allocatedValue) { TclDecrRefCount(valuePtr); } if (allocatedDict) { TclDecrRefCount(dictPtr); } return TCL_ERROR; } } } if (allocatedValue) { Tcl_DictObjPut(interp, dictPtr, objv[2], valuePtr); } else if (dictPtr->bytes != NULL) { Tcl_InvalidateStringRep(dictPtr); } resultPtr = Tcl_ObjSetVar2(interp, objv[1], NULL, dictPtr, TCL_LEAVE_ERR_MSG); if (resultPtr == NULL) { return TCL_ERROR; } Tcl_SetObjResult(interp, resultPtr); return TCL_OK; }  /* *---------------------------------------------------------------------- * * DictAppendCmd -- * * This function implements the "dict append" Tcl command. See the user * documentation for details on what it does, and TIP#111 for the formal * specification. * * Results: * A standard Tcl result. * * Side effects: * See the user documentation. * *---------------------------------------------------------------------- */ static int DictAppendCmd( ClientData dummy, Tcl_Interp *interp, int objc, Tcl_Obj *const *objv) { Tcl_Obj *dictPtr, *valuePtr, *resultPtr; int i, allocatedDict = 0; if (objc < 3) { Tcl_WrongNumArgs(interp, 1, objv, "varName key ?value ...?"); return TCL_ERROR; } dictPtr = Tcl_ObjGetVar2(interp, objv[1], NULL, 0); if (dictPtr == NULL) { allocatedDict = 1; dictPtr = Tcl_NewDictObj(); } else if (Tcl_IsShared(dictPtr)) { allocatedDict = 1; dictPtr = Tcl_DuplicateObj(dictPtr); } if (Tcl_DictObjGet(interp, dictPtr, objv[2], &valuePtr) != TCL_OK) { if (allocatedDict) { TclDecrRefCount(dictPtr); } return TCL_ERROR; } if (valuePtr == NULL) { TclNewObj(valuePtr); } else { if (Tcl_IsShared(valuePtr)) { valuePtr = Tcl_DuplicateObj(valuePtr); } } for (i=3 ; i<objc ; i++) { Tcl_AppendObjToObj(valuePtr, objv[i]); } Tcl_DictObjPut(interp, dictPtr, objv[2], valuePtr); resultPtr = Tcl_ObjSetVar2(interp, objv[1], NULL, dictPtr, TCL_LEAVE_ERR_MSG); if (resultPtr == NULL) { return TCL_ERROR; } Tcl_SetObjResult(interp, resultPtr); return TCL_OK; }  /* *---------------------------------------------------------------------- * * DictForCmd -- * * This function implements the "dict for" Tcl command. See the user * documentation for details on what it does, and TIP#111 for the formal * specification. * * Results: * A standard Tcl result. * * Side effects: * See the user documentation. * *---------------------------------------------------------------------- */ static int DictForCmd( ClientData dummy, Tcl_Interp *interp, int objc, Tcl_Obj *const *objv) { Interp *iPtr = (Interp *) interp; Tcl_Obj *scriptObj, *keyVarObj, *valueVarObj; Tcl_Obj **varv, *keyObj, *valueObj; Tcl_DictSearch search; int varc, done, result; if (objc != 4) { Tcl_WrongNumArgs(interp, 1, objv, "{keyVar valueVar} dictionary script"); return TCL_ERROR; } if (TclListObjGetElements(interp, objv[1], &varc, &varv) != TCL_OK) { return TCL_ERROR; } if (varc != 2) { Tcl_SetResult(interp, "must have exactly two variable names", TCL_STATIC); return TCL_ERROR; } keyVarObj = varv[0]; valueVarObj = varv[1]; scriptObj = objv[3]; if (Tcl_DictObjFirst(interp, objv[2], &search, &keyObj, &valueObj, &done) != TCL_OK) { return TCL_ERROR; } /* * Make sure that these objects (which we need throughout the body of the * loop) don't vanish. Note that the dictionary internal rep is locked * internally so that updates, shimmering, etc are not a problem. */ Tcl_IncrRefCount(keyVarObj); Tcl_IncrRefCount(valueVarObj); Tcl_IncrRefCount(scriptObj); result = TCL_OK; while (!done) { /* * Stop the value from getting hit in any way by any traces on the key * variable. */ Tcl_IncrRefCount(valueObj); if (Tcl_ObjSetVar2(interp, keyVarObj, NULL, keyObj, 0) == NULL) { Tcl_ResetResult(interp); Tcl_AppendResult(interp, "couldn't set key variable: \"", TclGetString(keyVarObj), "\"", NULL); TclDecrRefCount(valueObj); result = TCL_ERROR; break; } TclDecrRefCount(valueObj); if (Tcl_ObjSetVar2(interp, valueVarObj, NULL, valueObj, 0) == NULL) { Tcl_ResetResult(interp); Tcl_AppendResult(interp, "couldn't set value variable: \"", TclGetString(valueVarObj), "\"", NULL); result = TCL_ERROR; break; } /* * TIP #280. Make invoking context available to loop body. */ result = TclEvalObjEx(interp, scriptObj, 0, iPtr->cmdFramePtr, 3); if (result == TCL_CONTINUE) { result = TCL_OK; } else if (result != TCL_OK) { if (result == TCL_BREAK) { result = TCL_OK; } else if (result == TCL_ERROR) { Tcl_AppendObjToErrorInfo(interp, Tcl_ObjPrintf( "\n (\"dict for\" body line %d)", interp->errorLine)); } break; } Tcl_DictObjNext(&search, &keyObj, &valueObj, &done); } /* * Stop holding a reference to these objects. */ TclDecrRefCount(keyVarObj); TclDecrRefCount(valueVarObj); TclDecrRefCount(scriptObj); Tcl_DictObjDone(&search); if (result == TCL_OK) { Tcl_ResetResult(interp); } return result; }  /* *---------------------------------------------------------------------- * * DictSetCmd -- * * This function implements the "dict set" Tcl command. See the user * documentation for details on what it does, and TIP#111 for the formal * specification. * * Results: * A standard Tcl result. * * Side effects: * See the user documentation. * *---------------------------------------------------------------------- */ static int DictSetCmd( ClientData dummy, Tcl_Interp *interp, int objc, Tcl_Obj *const *objv) { Tcl_Obj *dictPtr, *resultPtr; int result, allocatedDict = 0; if (objc < 4) { Tcl_WrongNumArgs(interp, 1, objv, "varName key ?key ...? value"); return TCL_ERROR; } dictPtr = Tcl_ObjGetVar2(interp, objv[1], NULL, 0); if (dictPtr == NULL) { allocatedDict = 1; dictPtr = Tcl_NewDictObj(); } else if (Tcl_IsShared(dictPtr)) { allocatedDict = 1; dictPtr = Tcl_DuplicateObj(dictPtr); } result = Tcl_DictObjPutKeyList(interp, dictPtr, objc-3, objv+2, objv[objc-1]); if (result != TCL_OK) { if (allocatedDict) { TclDecrRefCount(dictPtr); } return TCL_ERROR; } resultPtr = Tcl_ObjSetVar2(interp, objv[1], NULL, dictPtr, TCL_LEAVE_ERR_MSG); if (resultPtr == NULL) { return TCL_ERROR; } Tcl_SetObjResult(interp, resultPtr); return TCL_OK; }  /* *---------------------------------------------------------------------- * * DictUnsetCmd -- * * This function implements the "dict unset" Tcl command. See the user * documentation for details on what it does, and TIP#111 for the formal * specification. * * Results: * A standard Tcl result. * * Side effects: * See the user documentation. * *---------------------------------------------------------------------- */ static int DictUnsetCmd( ClientData dummy, Tcl_Interp *interp, int objc, Tcl_Obj *const *objv) { Tcl_Obj *dictPtr, *resultPtr; int result, allocatedDict = 0; if (objc < 3) { Tcl_WrongNumArgs(interp, 1, objv, "varName key ?key ...?"); return TCL_ERROR; } dictPtr = Tcl_ObjGetVar2(interp, objv[1], NULL, 0); if (dictPtr == NULL) { allocatedDict = 1; dictPtr = Tcl_NewDictObj(); } else if (Tcl_IsShared(dictPtr)) { allocatedDict = 1; dictPtr = Tcl_DuplicateObj(dictPtr); } result = Tcl_DictObjRemoveKeyList(interp, dictPtr, objc-2, objv+2); if (result != TCL_OK) { if (allocatedDict) { TclDecrRefCount(dictPtr); } return TCL_ERROR; } resultPtr = Tcl_ObjSetVar2(interp, objv[1], NULL, dictPtr, TCL_LEAVE_ERR_MSG); if (resultPtr == NULL) { return TCL_ERROR; } Tcl_SetObjResult(interp, resultPtr); return TCL_OK; }  /* *---------------------------------------------------------------------- * * DictFilterCmd -- * * This function implements the "dict filter" Tcl command. See the user * documentation for details on what it does, and TIP#111 for the formal * specification. * * Results: * A standard Tcl result. * * Side effects: * See the user documentation. * *---------------------------------------------------------------------- */ static int DictFilterCmd( ClientData dummy, Tcl_Interp *interp, int objc, Tcl_Obj *const *objv) { Interp *iPtr = (Interp *) interp; static const char *filters[] = { "key", "script", "value", NULL }; enum FilterTypes { FILTER_KEYS, FILTER_SCRIPT, FILTER_VALUES }; Tcl_Obj *scriptObj, *keyVarObj, *valueVarObj; Tcl_Obj **varv, *keyObj, *valueObj, *resultObj, *boolObj; Tcl_DictSearch search; int index, varc, done, result, satisfied; char *pattern; if (objc < 3) { Tcl_WrongNumArgs(interp, 1, objv, "dictionary filterType ..."); return TCL_ERROR; } if (Tcl_GetIndexFromObj(interp, objv[2], filters, "filterType", 0, &index) != TCL_OK) { return TCL_ERROR; } switch ((enum FilterTypes) index) { case FILTER_KEYS: if (objc != 4) { Tcl_WrongNumArgs(interp, 1, objv, "dictionary key globPattern"); return TCL_ERROR; } /* * Create a dictionary whose keys all match a certain pattern. */ if (Tcl_DictObjFirst(interp, objv[1], &search, &keyObj, &valueObj, &done) != TCL_OK) { return TCL_ERROR; } pattern = TclGetString(objv[3]); resultObj = Tcl_NewDictObj(); if (TclMatchIsTrivial(pattern)) { /* * Must release the search lock here to prevent a memory leak * since we are not exhausing the search. [Bug 1705778, leak K05] */ Tcl_DictObjDone(&search); Tcl_DictObjGet(interp, objv[1], objv[3], &valueObj); if (valueObj != NULL) { Tcl_DictObjPut(interp, resultObj, objv[3], valueObj); } } else { while (!done) { if (Tcl_StringMatch(TclGetString(keyObj), pattern)) { Tcl_DictObjPut(interp, resultObj, keyObj, valueObj); } Tcl_DictObjNext(&search, &keyObj, &valueObj, &done); } } Tcl_SetObjResult(interp, resultObj); return TCL_OK; case FILTER_VALUES: if (objc != 4) { Tcl_WrongNumArgs(interp, 1, objv, "dictionary value globPattern"); return TCL_ERROR; } /* * Create a dictionary whose values all match a certain pattern. */ if (Tcl_DictObjFirst(interp, objv[1], &search, &keyObj, &valueObj, &done) != TCL_OK) { return TCL_ERROR; } pattern = TclGetString(objv[3]); resultObj = Tcl_NewDictObj(); while (!done) { if (Tcl_StringMatch(TclGetString(valueObj), pattern)) { Tcl_DictObjPut(interp, resultObj, keyObj, valueObj); } Tcl_DictObjNext(&search, &keyObj, &valueObj, &done); } Tcl_SetObjResult(interp, resultObj); return TCL_OK; case FILTER_SCRIPT: if (objc != 5) { Tcl_WrongNumArgs(interp, 1, objv, "dictionary script {keyVar valueVar} filterScript"); return TCL_ERROR; } /* * Create a dictionary whose key,value pairs all satisfy a script * (i.e. get a true boolean result from its evaluation). Massive * copying from the "dict for" implementation has occurred! */ if (TclListObjGetElements(interp, objv[3], &varc, &varv) != TCL_OK) { return TCL_ERROR; } if (varc != 2) { Tcl_SetResult(interp, "must have exactly two variable names", TCL_STATIC); return TCL_ERROR; } keyVarObj = varv[0]; valueVarObj = varv[1]; scriptObj = objv[4]; /* * Make sure that these objects (which we need throughout the body of * the loop) don't vanish. Note that the dictionary internal rep is * locked internally so that updates, shimmering, etc are not a * problem. */ Tcl_IncrRefCount(keyVarObj); Tcl_IncrRefCount(valueVarObj); Tcl_IncrRefCount(scriptObj); result = Tcl_DictObjFirst(interp, objv[1], &search, &keyObj, &valueObj, &done); if (result != TCL_OK) { TclDecrRefCount(keyVarObj); TclDecrRefCount(valueVarObj); TclDecrRefCount(scriptObj); return TCL_ERROR; } resultObj = Tcl_NewDictObj(); while (!done) { /* * Stop the value from getting hit in any way by any traces on the * key variable. */ Tcl_IncrRefCount(keyObj); Tcl_IncrRefCount(valueObj); if (Tcl_ObjSetVar2(interp, keyVarObj, NULL, keyObj, TCL_LEAVE_ERR_MSG) == NULL) { Tcl_ResetResult(interp); Tcl_AppendResult(interp, "couldn't set key variable: \"", TclGetString(keyVarObj), "\"", NULL); result = TCL_ERROR; goto abnormalResult; } if (Tcl_ObjSetVar2(interp, valueVarObj, NULL, valueObj, TCL_LEAVE_ERR_MSG) == NULL) { Tcl_ResetResult(interp); Tcl_AppendResult(interp, "couldn't set value variable: \"", TclGetString(valueVarObj), "\"", NULL); goto abnormalResult; } /* * TIP #280. Make invoking context available to loop body. */ result = TclEvalObjEx(interp, scriptObj, 0, iPtr->cmdFramePtr, 4); switch (result) { case TCL_OK: boolObj = Tcl_GetObjResult(interp); Tcl_IncrRefCount(boolObj); Tcl_ResetResult(interp); if (Tcl_GetBooleanFromObj(interp, boolObj, &satisfied) != TCL_OK) { TclDecrRefCount(boolObj); result = TCL_ERROR; goto abnormalResult; } TclDecrRefCount(boolObj); if (satisfied) { Tcl_DictObjPut(interp, resultObj, keyObj, valueObj); } break; case TCL_BREAK: /* * Force loop termination by calling Tcl_DictObjDone; this * makes the next Tcl_DictObjNext say there is nothing more to * do. */ Tcl_ResetResult(interp); Tcl_DictObjDone(&search); case TCL_CONTINUE: result = TCL_OK; break; case TCL_ERROR: Tcl_AppendObjToErrorInfo(interp, Tcl_ObjPrintf( "\n (\"dict filter\" script line %d)", interp->errorLine)); default: goto abnormalResult; } TclDecrRefCount(keyObj); TclDecrRefCount(valueObj); Tcl_DictObjNext(&search, &keyObj, &valueObj, &done); } /* * Stop holding a reference to these objects. */ TclDecrRefCount(keyVarObj); TclDecrRefCount(valueVarObj); TclDecrRefCount(scriptObj); Tcl_DictObjDone(&search); if (result == TCL_OK) { Tcl_SetObjResult(interp, resultObj); } else { TclDecrRefCount(resultObj); } return result; abnormalResult: Tcl_DictObjDone(&search); TclDecrRefCount(keyObj); TclDecrRefCount(valueObj); TclDecrRefCount(keyVarObj); TclDecrRefCount(valueVarObj); TclDecrRefCount(scriptObj); TclDecrRefCount(resultObj); return result; } Tcl_Panic("unexpected fallthrough"); /* Control never reaches this point. */ return TCL_ERROR; }  /* *---------------------------------------------------------------------- * * DictUpdateCmd -- * * This function implements the "dict update" Tcl command. See the user * documentation for details on what it does, and TIP#212 for the formal * specification. * * Results: * A standard Tcl result. * * Side effects: * See the user documentation. * *---------------------------------------------------------------------- */ static int DictUpdateCmd( ClientData clientData, Tcl_Interp *interp, int objc, Tcl_Obj *const *objv) { Interp *iPtr = (Interp *) interp; Tcl_Obj *dictPtr, *objPtr; int i, result, dummy; Tcl_InterpState state; if (objc < 5 || !(objc & 1)) { Tcl_WrongNumArgs(interp, 1, objv, "varName key varName ?key varName ...? script"); return TCL_ERROR; } dictPtr = Tcl_ObjGetVar2(interp, objv[1], NULL, TCL_LEAVE_ERR_MSG); if (dictPtr == NULL) { return TCL_ERROR; } if (Tcl_DictObjSize(interp, dictPtr, &dummy) != TCL_OK) { return TCL_ERROR; } Tcl_IncrRefCount(dictPtr); for (i=2 ; i+2<objc ; i+=2) { if (Tcl_DictObjGet(interp, dictPtr, objv[i], &objPtr) != TCL_OK) { TclDecrRefCount(dictPtr); return TCL_ERROR; } if (objPtr == NULL) { /* ??? */ Tcl_UnsetVar(interp, Tcl_GetString(objv[i+1]), 0); } else if (Tcl_ObjSetVar2(interp, objv[i+1], NULL, objPtr, TCL_LEAVE_ERR_MSG) == NULL) { TclDecrRefCount(dictPtr); return TCL_ERROR; } } TclDecrRefCount(dictPtr); /* * Execute the body. */ result = TclEvalObjEx(interp, objv[objc-1], 0, iPtr->cmdFramePtr, objc-1); if (result == TCL_ERROR) { Tcl_AddErrorInfo(interp, "\n (body of \"dict update\")"); } /* * If the dictionary variable doesn't exist, drop everything silently. */ dictPtr = Tcl_ObjGetVar2(interp, objv[1], NULL, 0); if (dictPtr == NULL) { return result; } /* * Double-check that it is still a dictionary. */ state = Tcl_SaveInterpState(interp, result); if (Tcl_DictObjSize(interp, dictPtr, &dummy) != TCL_OK) { Tcl_DiscardInterpState(state); return TCL_ERROR; } if (Tcl_IsShared(dictPtr)) { dictPtr = Tcl_DuplicateObj(dictPtr); } /* * Write back the values from the variables, treating failure to read as * an instruction to remove the key. */ for (i=2 ; i+2<objc ; i+=2) { objPtr = Tcl_ObjGetVar2(interp, objv[i+1], NULL, 0); if (objPtr == NULL) { Tcl_DictObjRemove(interp, dictPtr, objv[i]); } else if (objPtr == dictPtr) { /* * Someone is messing us around, trying to build a recursive * structure. [Bug 1786481] */ Tcl_DictObjPut(interp, dictPtr, objv[i], Tcl_DuplicateObj(objPtr)); } else { /* Shouldn't fail */ Tcl_DictObjPut(interp, dictPtr, objv[i], objPtr); } } /* * Write the dictionary back to its variable. */ if (Tcl_ObjSetVar2(interp, objv[1], NULL, dictPtr, TCL_LEAVE_ERR_MSG) == NULL) { Tcl_DiscardInterpState(state); return TCL_ERROR; } return Tcl_RestoreInterpState(interp, state); }  /* *---------------------------------------------------------------------- * * DictWithCmd -- * * This function implements the "dict with" Tcl command. See the user * documentation for details on what it does, and TIP#212 for the formal * specification. * * Results: * A standard Tcl result. * * Side effects: * See the user documentation. * *---------------------------------------------------------------------- */ static int DictWithCmd( ClientData dummy, Tcl_Interp *interp, int objc, Tcl_Obj *const *objv) { Interp *iPtr = (Interp *) interp; Tcl_Obj *dictPtr, *keysPtr, *keyPtr, *valPtr, **keyv, *leafPtr; Tcl_DictSearch s; Tcl_InterpState state; int done, result, keyc, i, allocdict = 0; if (objc < 3) { Tcl_WrongNumArgs(interp, 1, objv, "dictVar ?key ...? script"); return TCL_ERROR; } /* * Get the dictionary to open out. */ dictPtr = Tcl_ObjGetVar2(interp, objv[1], NULL, TCL_LEAVE_ERR_MSG); if (dictPtr == NULL) { return TCL_ERROR; } if (objc > 3) { dictPtr = TclTraceDictPath(interp, dictPtr, objc-3, objv+2, DICT_PATH_READ); if (dictPtr == NULL) { return TCL_ERROR; } } /* * Go over the list of keys and write each corresponding value to a * variable in the current context with the same name. Also keep a copy of * the keys so we can write back properly later on even if the dictionary * has been structurally modified. */ if (Tcl_DictObjFirst(interp, dictPtr, &s, &keyPtr, &valPtr, &done) != TCL_OK) { return TCL_ERROR; } TclNewObj(keysPtr); Tcl_IncrRefCount(keysPtr); for (; !done ; Tcl_DictObjNext(&s, &keyPtr, &valPtr, &done)) { Tcl_ListObjAppendElement(NULL, keysPtr, keyPtr); if (Tcl_ObjSetVar2(interp, keyPtr, NULL, valPtr, TCL_LEAVE_ERR_MSG) == NULL) { TclDecrRefCount(keysPtr); Tcl_DictObjDone(&s); return TCL_ERROR; } } /* * Execute the body, while making the invoking context available to the * loop body (TIP#280). */ result = TclEvalObjEx(interp, objv[objc-1], 0, iPtr->cmdFramePtr, objc-1); if (result == TCL_ERROR) { Tcl_AddErrorInfo(interp, "\n (body of \"dict with\")"); } /* * If the dictionary variable doesn't exist, drop everything silently. */ dictPtr = Tcl_ObjGetVar2(interp, objv[1], NULL, 0); if (dictPtr == NULL) { TclDecrRefCount(keysPtr); return result; } /* * Double-check that it is still a dictionary. */ state = Tcl_SaveInterpState(interp, result); if (Tcl_DictObjSize(interp, dictPtr, &i) != TCL_OK) { TclDecrRefCount(keysPtr); Tcl_DiscardInterpState(state); return TCL_ERROR; } if (Tcl_IsShared(dictPtr)) { dictPtr = Tcl_DuplicateObj(dictPtr); allocdict = 1; } if (objc > 3) { /* * Want to get to the dictionary which we will update; need to do * prepare-for-update de-sharing along the path *but* avoid generating * an error on a non-existant path (we'll treat that the same as a * non-existant variable. Luckily, the de-sharing operation isn't * deeply damaging if we don't go on to update; it's just less than * perfectly efficient (but no memory should be leaked). */ leafPtr = TclTraceDictPath(interp, dictPtr, objc-3, objv+2, DICT_PATH_EXISTS | DICT_PATH_UPDATE); if (leafPtr == NULL) { TclDecrRefCount(keysPtr); if (allocdict) { TclDecrRefCount(dictPtr); } Tcl_DiscardInterpState(state); return TCL_ERROR; } if (leafPtr == DICT_PATH_NON_EXISTENT) { TclDecrRefCount(keysPtr); if (allocdict) { TclDecrRefCount(dictPtr); } return Tcl_RestoreInterpState(interp, state); } } else { leafPtr = dictPtr; } /* * Now process our updates on the leaf dictionary. */ TclListObjGetElements(NULL, keysPtr, &keyc, &keyv); for (i=0 ; i<keyc ; i++) { valPtr = Tcl_ObjGetVar2(interp, keyv[i], NULL, 0); if (valPtr == NULL) { Tcl_DictObjRemove(NULL, leafPtr, keyv[i]); } else if (leafPtr == valPtr) { /* * Someone is messing us around, trying to build a recursive * structure. [Bug 1786481] */ Tcl_DictObjPut(NULL, leafPtr, keyv[i], Tcl_DuplicateObj(valPtr)); } else { Tcl_DictObjPut(NULL, leafPtr, keyv[i], valPtr); } } TclDecrRefCount(keysPtr); /* * Ensure that none of the dictionaries in the chain still have a string * rep. */ if (objc > 3) { InvalidateDictChain(leafPtr); } /* * Write back the outermost dictionary to the variable. */ if (Tcl_ObjSetVar2(interp, objv[1], NULL, dictPtr, TCL_LEAVE_ERR_MSG) == NULL) { Tcl_DiscardInterpState(state); return TCL_ERROR; } return Tcl_RestoreInterpState(interp, state); }  /* *---------------------------------------------------------------------- * * TclInitDictCmd -- * * This function is create the "dict" Tcl command. See the user * documentation for details on what it does, and TIP#111 for the formal * specification. * * Results: * A Tcl command handle. * * Side effects: * May advance compilation epoch. * *---------------------------------------------------------------------- */ Tcl_Command TclInitDictCmd( Tcl_Interp *interp) { return TclMakeEnsemble(interp, "dict", implementationMap); }  /* * Local Variables: * mode: c * c-basic-offset: 4 * fill-column: 78 * End: */

• ソフトウェア開発
• ホームページ制作
• Doxygen版
• STLport版