home *** CD-ROM | disk | FTP | other *** search
- /* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
- *
- * The contents of this file are subject to the Netscape Public License
- * Version 1.0 (the "NPL"); you may not use this file except in
- * compliance with the NPL. You may obtain a copy of the NPL at
- * http://www.mozilla.org/NPL/
- *
- * Software distributed under the NPL is distributed on an "AS IS" basis,
- * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
- * for the specific language governing rights and limitations under the
- * NPL.
- *
- * The Initial Developer of this code under the NPL is Netscape
- * Communications Corporation. Portions created by Netscape are
- * Copyright (C) 1998 Netscape Communications Corporation. All Rights
- * Reserved.
- */
-
- #ifndef jsatom_h___
- #define jsatom_h___
- /*
- * JS atom table.
- */
- #include <stddef.h>
- #include "prtypes.h"
- #ifndef NSPR20
- #include "prhash.h"
- #else
- #include "plhash.h"
- #endif
- #include "jsapi.h"
- #include "jsprvtd.h"
- #include "jspubtd.h"
-
- PR_BEGIN_EXTERN_C
-
- #define ATOM_INDEXED 0x01 /* indexed for literal mapping */
- #define ATOM_NOCOPY 0x02 /* don't copy atom string bytes */
- #define ATOM_NOHOLD 0x04 /* atomize a weak link for parser */
- #define ATOM_TMPSTR 0x08 /* internal, to avoid extra string */
-
- struct JSAtom {
- PRHashEntry entry; /* key is jsval, value keyword info */
- jsrefcount nrefs; /* reference count (not at front!) */
- uint8 flags; /* flags, ATOM_INDEXED or 0 for now */
- int8 kwindex; /* keyword index, -1 if not keyword */
- jsatomid index; /* index in script-specific atom map */
- jsatomid number; /* atom serial number and hash code */
- };
-
- #define ATOM_KEY(atom) ((jsval)(atom)->entry.key)
- #define ATOM_IS_OBJECT(atom) JSVAL_IS_OBJECT(ATOM_KEY(atom))
- #define ATOM_TO_OBJECT(atom) JSVAL_TO_OBJECT(ATOM_KEY(atom))
- #define ATOM_IS_INT(atom) JSVAL_IS_INT(ATOM_KEY(atom))
- #define ATOM_TO_INT(atom) JSVAL_TO_INT(ATOM_KEY(atom))
- #define ATOM_IS_DOUBLE(atom) JSVAL_IS_DOUBLE(ATOM_KEY(atom))
- #define ATOM_TO_DOUBLE(atom) JSVAL_TO_DOUBLE(ATOM_KEY(atom))
- #define ATOM_IS_STRING(atom) JSVAL_IS_STRING(ATOM_KEY(atom))
- #define ATOM_TO_STRING(atom) JSVAL_TO_STRING(ATOM_KEY(atom))
- #define ATOM_IS_BOOLEAN(atom) JSVAL_IS_BOOLEAN(ATOM_KEY(atom))
- #define ATOM_TO_BOOLEAN(atom) JSVAL_TO_BOOLEAN(ATOM_KEY(atom))
- #define ATOM_BYTES(atom) JS_GetStringBytes(ATOM_TO_STRING(atom))
- #define ATOM_NEXT(atom) ((JSAtom *)(atom)->entry.value)
- #define ATOM_SET_NEXT(atom,next) ((atom)->entry.value = (next))
-
- struct JSAtomList {
- JSAtom *list; /* literals indexed for mapping */
- jsuint count; /* count of indexed literals */
- };
-
- #define INIT_ATOM_LIST(al) ((al)->list = NULL, (al)->count = 0)
-
- struct JSAtomMap {
- JSAtom **vector; /* array of ptrs to indexed atoms */
- jsatomid length; /* count of (to-be-)indexed atoms */
- };
-
- struct JSAtomState {
- PRHashTable *table; /* hash table containing all atoms */
- jsatomid number; /* one beyond greatest atom number */
-
- /* Type names and value literals. */
- JSAtom *typeAtoms[JSTYPE_LIMIT];
- JSAtom *booleanAtoms[2];
- JSAtom *nullAtom;
-
- /* Various built-in or commonly-used atoms. */
- JSAtom *ArrayAtom;
- JSAtom *ObjectAtom;
- JSAtom *anonymousAtom;
- JSAtom *assignAtom;
- JSAtom *classPrototypeAtom;
- JSAtom *constructorAtom;
- JSAtom *countAtom;
- JSAtom *indexAtom;
- JSAtom *inputAtom;
- JSAtom *lengthAtom;
- JSAtom *parentAtom;
- JSAtom *protoAtom;
- JSAtom *toStringAtom;
- JSAtom *valueOfAtom;
- };
-
- /* Well-known predefined strings and their atoms. */
- extern char *js_type_str[];
-
- extern char js_Array_str[];
- extern char js_Object_str[];
- extern char js_anonymous_str[];
- extern char js_assign_str[];
- extern char js_class_prototype_str[];
- extern char js_constructor_str[];
- extern char js_count_str[];
- extern char js_eval_str[];
- extern char js_index_str[];
- extern char js_input_str[];
- extern char js_length_str[];
- extern char js_parent_str[];
- extern char js_proto_str[];
- extern char js_toString_str[];
- extern char js_valueOf_str[];
-
- /*
- * Initialize atom bookkeeping. Return true on success, false with an out of
- * memory error report on failure.
- */
- extern JSBool
- js_InitAtomState(JSContext *cx, JSAtomState *state);
-
- /*
- * Free and clear atom bookkeeping.
- */
- extern void
- js_FreeAtomState(JSContext *cx, JSAtomState *state);
-
- /*
- * Free and clear atom bookkeeping.
- */
- typedef void
- (*JSAtomMarker)(JSRuntime *rt, void *thing);
-
- extern void
- js_MarkAtomState(JSRuntime *rt, JSAtomMarker mark);
-
- /*
- * Find or create the atom for an object. If we create a new atom, give it the
- * type indicated in flags. Return 0 on failure to allocate memory.
- */
- extern JSAtom *
- js_AtomizeObject(JSContext *cx, JSObject *obj, uintN flags);
-
- /*
- * Find or create the atom for a Boolean value. If we create a new atom, give
- * it the type indicated in flags. Return 0 on failure to allocate memory.
- */
- extern JSAtom *
- js_AtomizeBoolean(JSContext *cx, JSBool b, uintN flags);
-
- /*
- * Find or create the atom for an integer value. If we create a new atom, give
- * it the type indicated in flags. Return 0 on failure to allocate memory.
- */
- extern JSAtom *
- js_AtomizeInt(JSContext *cx, jsint i, uintN flags);
-
- /*
- * Find or create the atom for a double value. If we create a new atom, give
- * it the type indicated in flags. Return 0 on failure to allocate memory.
- */
- extern JSAtom *
- js_AtomizeDouble(JSContext *cx, jsdouble d, uintN flags);
-
- /*
- * Find or create the atom for a string. If we create a new atom, give it the
- * type indicated in flags. Return 0 on failure to allocate memory.
- */
- extern JSAtom *
- js_AtomizeString(JSContext *cx, JSString *str, uintN flags);
-
- extern JS_FRIEND_API(JSAtom *)
- js_Atomize(JSContext *cx, const char *bytes, size_t length, uintN flags);
-
- extern JS_FRIEND_API(JSAtom *)
- js_AtomizeChars(JSContext *cx, const jschar *chars, size_t length, uintN flags);
-
- /*
- * This variant handles all value tag types.
- */
- extern JSAtom *
- js_AtomizeValue(JSContext *cx, jsval value, uintN flags);
-
- /*
- * Convert v to an atomized string.
- */
- extern JSAtom *
- js_ValueToStringAtom(JSContext *cx, jsval v);
-
- /*
- * Assign atom an index and insert it on al.
- */
- extern jsatomid
- js_IndexAtom(JSContext *cx, JSAtom *atom, JSAtomList *al);
-
- /*
- * Atom reference counting operators.
- */
- extern JSAtom *
- js_HoldAtom(JSContext *cx, JSAtom *atom);
-
- extern JS_FRIEND_API(JSAtom *)
- js_DropAtom(JSContext *cx, JSAtom *atom);
-
- /*
- * Get the atom with index i from map.
- */
- extern JSAtom *
- js_GetAtom(JSContext *cx, JSAtomMap *map, jsatomid i);
-
- /*
- * For all unmapped atoms recorded in al, add a mapping from the atom's index
- * to its address, which holds a reference.
- */
- extern JS_FRIEND_API(JSBool)
- js_InitAtomMap(JSContext *cx, JSAtomMap *map, JSAtomList *al);
-
- /*
- * Drop all atom references from map and free its vector.
- */
- extern JS_FRIEND_API(void)
- js_FreeAtomMap(JSContext *cx, JSAtomMap *map);
-
- /*
- * Drop any unmapped atoms on al.
- */
- extern void
- js_DropUnmappedAtoms(JSContext *cx, JSAtomList *al);
-
- PR_END_EXTERN_C
-
- #endif /* jsatom_h___ */
-