diff options
| author | Aaron Spike <aaron@ekips.org> | 2006-04-12 13:20:54 +0000 |
|---|---|---|
| committer | acspike <acspike@users.sourceforge.net> | 2006-04-12 13:20:54 +0000 |
| commit | ddfaffe08d23e4663fe759d67ae33fd67fc9ce5b (patch) | |
| tree | 234f5425a7ef7058e69dc2ab77f89810e4f3ed91 /src/dom/js/jsfun.c | |
| parent | fix 1466070 (diff) | |
| download | inkscape-ddfaffe08d23e4663fe759d67ae33fd67fc9ce5b.tar.gz inkscape-ddfaffe08d23e4663fe759d67ae33fd67fc9ce5b.zip | |
Removed file/folder for ishmal
(bzr r478)
Diffstat (limited to 'src/dom/js/jsfun.c')
| -rw-r--r-- | src/dom/js/jsfun.c | 2059 |
1 files changed, 0 insertions, 2059 deletions
diff --git a/src/dom/js/jsfun.c b/src/dom/js/jsfun.c deleted file mode 100644 index 93cd4009d..000000000 --- a/src/dom/js/jsfun.c +++ /dev/null @@ -1,2059 +0,0 @@ -/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- - * - * ***** BEGIN LICENSE BLOCK ***** - * Version: MPL 1.1/GPL 2.0/LGPL 2.1 - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. You may obtain a copy of the License at - * http://www.mozilla.org/MPL/ - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - * - * The Original Code is Mozilla Communicator client code, released - * March 31, 1998. - * - * The Initial Developer of the Original Code is - * Netscape Communications Corporation. - * Portions created by the Initial Developer are Copyright (C) 1998 - * the Initial Developer. All Rights Reserved. - * - * Contributor(s): - * - * Alternatively, the contents of this file may be used under the terms of - * either of the GNU General Public License Version 2 or later (the "GPL"), - * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"), - * in which case the provisions of the GPL or the LGPL are applicable instead - * of those above. If you wish to allow use of your version of this file only - * under the terms of either the GPL or the LGPL, and not to allow others to - * use your version of this file under the terms of the MPL, indicate your - * decision by deleting the provisions above and replace them with the notice - * and other provisions required by the GPL or the LGPL. If you do not delete - * the provisions above, a recipient may use your version of this file under - * the terms of any one of the MPL, the GPL or the LGPL. - * - * ***** END LICENSE BLOCK ***** */ - -/* - * JS function support. - */ -#include "jsstddef.h" -#include <string.h> -#include "jstypes.h" -#include "jsbit.h" -#include "jsutil.h" /* Added by JSIFY */ -#include "jsapi.h" -#include "jsarray.h" -#include "jsatom.h" -#include "jscntxt.h" -#include "jsconfig.h" -#include "jsdbgapi.h" -#include "jsfun.h" -#include "jsgc.h" -#include "jsinterp.h" -#include "jslock.h" -#include "jsnum.h" -#include "jsobj.h" -#include "jsopcode.h" -#include "jsparse.h" -#include "jsscan.h" -#include "jsscope.h" -#include "jsscript.h" -#include "jsstr.h" -#include "jsexn.h" - -/* Generic function/call/arguments tinyids -- also reflected bit numbers. */ -enum { - CALL_ARGUMENTS = -1, /* predefined arguments local variable */ - CALL_CALLEE = -2, /* reference to active function's object */ - ARGS_LENGTH = -3, /* number of actual args, arity if inactive */ - ARGS_CALLEE = -4, /* reference from arguments to active funobj */ - FUN_ARITY = -5, /* number of formal parameters; desired argc */ - FUN_NAME = -6, /* function name, "" if anonymous */ - FUN_CALLER = -7 /* Function.prototype.caller, backward compat */ -}; - -#if JSFRAME_OVERRIDE_BITS < 8 -# error "not enough override bits in JSStackFrame.flags!" -#endif - -#define TEST_OVERRIDE_BIT(fp, tinyid) \ - ((fp)->flags & JS_BIT(JSFRAME_OVERRIDE_SHIFT - ((tinyid) + 1))) - -#define SET_OVERRIDE_BIT(fp, tinyid) \ - ((fp)->flags |= JS_BIT(JSFRAME_OVERRIDE_SHIFT - ((tinyid) + 1))) - -#if JS_HAS_ARGS_OBJECT - -JSBool -js_GetArgsValue(JSContext *cx, JSStackFrame *fp, jsval *vp) -{ - JSObject *argsobj; - - if (TEST_OVERRIDE_BIT(fp, CALL_ARGUMENTS)) { - JS_ASSERT(fp->callobj); - return OBJ_GET_PROPERTY(cx, fp->callobj, - (jsid) cx->runtime->atomState.argumentsAtom, - vp); - } - argsobj = js_GetArgsObject(cx, fp); - if (!argsobj) - return JS_FALSE; - *vp = OBJECT_TO_JSVAL(argsobj); - return JS_TRUE; -} - -static JSBool -MarkArgDeleted(JSContext *cx, JSStackFrame *fp, uintN slot) -{ - JSObject *argsobj; - jsval bmapval, bmapint; - size_t nbits, nbytes; - jsbitmap *bitmap; - - argsobj = fp->argsobj; - (void) JS_GetReservedSlot(cx, argsobj, 0, &bmapval); - nbits = JS_MAX(fp->argc, fp->fun->nargs); - JS_ASSERT(slot < nbits); - if (JSVAL_IS_VOID(bmapval)) { - if (nbits <= JSVAL_INT_BITS) { - bmapint = 0; - bitmap = (jsbitmap *) &bmapint; - } else { - nbytes = JS_HOWMANY(nbits, JS_BITS_PER_WORD) * sizeof(jsbitmap); - bitmap = (jsbitmap *) JS_malloc(cx, nbytes); - if (!bitmap) - return JS_FALSE; - memset(bitmap, 0, nbytes); - bmapval = PRIVATE_TO_JSVAL(bitmap); - JS_SetReservedSlot(cx, argsobj, 0, bmapval); - } - } else { - if (nbits <= JSVAL_INT_BITS) { - bmapint = JSVAL_TO_INT(bmapval); - bitmap = (jsbitmap *) &bmapint; - } else { - bitmap = (jsbitmap *) JSVAL_TO_PRIVATE(bmapval); - } - } - JS_SET_BIT(bitmap, slot); - if (bitmap == (jsbitmap *) &bmapint) { - bmapval = INT_TO_JSVAL(bmapint); - JS_SetReservedSlot(cx, argsobj, 0, bmapval); - } - return JS_TRUE; -} - -/* NB: Infallible predicate, false does not mean error/exception. */ -static JSBool -ArgWasDeleted(JSContext *cx, JSStackFrame *fp, uintN slot) -{ - JSObject *argsobj; - jsval bmapval, bmapint; - jsbitmap *bitmap; - - argsobj = fp->argsobj; - (void) JS_GetReservedSlot(cx, argsobj, 0, &bmapval); - if (JSVAL_IS_VOID(bmapval)) - return JS_FALSE; - if (JS_MAX(fp->argc, fp->fun->nargs) <= JSVAL_INT_BITS) { - bmapint = JSVAL_TO_INT(bmapval); - bitmap = (jsbitmap *) &bmapint; - } else { - bitmap = (jsbitmap *) JSVAL_TO_PRIVATE(bmapval); - } - return JS_TEST_BIT(bitmap, slot) != 0; -} - -JSBool -js_GetArgsProperty(JSContext *cx, JSStackFrame *fp, jsid id, - JSObject **objp, jsval *vp) -{ - jsval val; - JSObject *obj; - uintN slot; - - if (TEST_OVERRIDE_BIT(fp, CALL_ARGUMENTS)) { - JS_ASSERT(fp->callobj); - if (!OBJ_GET_PROPERTY(cx, fp->callobj, - (jsid) cx->runtime->atomState.argumentsAtom, - &val)) { - return JS_FALSE; - } - if (JSVAL_IS_PRIMITIVE(val)) { - obj = js_ValueToNonNullObject(cx, val); - if (!obj) - return JS_FALSE; - } else { - obj = JSVAL_TO_OBJECT(val); - } - *objp = obj; - return OBJ_GET_PROPERTY(cx, obj, id, vp); - } - - *objp = NULL; - *vp = JSVAL_VOID; - if (JSVAL_IS_INT(id)) { - slot = (uintN) JSVAL_TO_INT(id); - if (slot < JS_MAX(fp->argc, fp->fun->nargs)) { - if (fp->argsobj && ArgWasDeleted(cx, fp, slot)) - return OBJ_GET_PROPERTY(cx, fp->argsobj, id, vp); - *vp = fp->argv[slot]; - } - } else { - if (id == (jsid) cx->runtime->atomState.lengthAtom) { - if (fp->argsobj && TEST_OVERRIDE_BIT(fp, ARGS_LENGTH)) - return OBJ_GET_PROPERTY(cx, fp->argsobj, id, vp); - *vp = INT_TO_JSVAL((jsint) fp->argc); - } - } - return JS_TRUE; -} - -JSObject * -js_GetArgsObject(JSContext *cx, JSStackFrame *fp) -{ - JSObject *argsobj; - - /* Create an arguments object for fp only if it lacks one. */ - JS_ASSERT(fp->fun); - argsobj = fp->argsobj; - if (argsobj) - return argsobj; - - /* Link the new object to fp so it can get actual argument values. */ - argsobj = js_NewObject(cx, &js_ArgumentsClass, NULL, NULL); - if (!argsobj || !JS_SetPrivate(cx, argsobj, fp)) { - cx->newborn[GCX_OBJECT] = NULL; - return NULL; - } - fp->argsobj = argsobj; - return argsobj; -} - -static JSBool -args_enumerate(JSContext *cx, JSObject *obj); - -JSBool -js_PutArgsObject(JSContext *cx, JSStackFrame *fp) -{ - JSObject *argsobj; - jsval bmapval, rval; - JSBool ok; - JSRuntime *rt; - - /* - * Reuse args_enumerate here to reflect fp's actual arguments as indexed - * elements of argsobj. Do this first, before clearing and freeing the - * deleted argument slot bitmap, because args_enumerate depends on that. - */ - argsobj = fp->argsobj; - ok = args_enumerate(cx, argsobj); - - /* - * Now clear the deleted argument number bitmap slot and free the bitmap, - * if one was actually created due to 'delete arguments[0]' or similar. - */ - (void) JS_GetReservedSlot(cx, argsobj, 0, &bmapval); - if (!JSVAL_IS_VOID(bmapval)) { - JS_SetReservedSlot(cx, argsobj, 0, JSVAL_VOID); - if (JS_MAX(fp->argc, fp->fun->nargs) > JSVAL_INT_BITS) - JS_free(cx, JSVAL_TO_PRIVATE(bmapval)); - } - - /* - * Now get the prototype properties so we snapshot fp->fun and fp->argc - * before fp goes away. - */ - rt = cx->runtime; - ok &= js_GetProperty(cx, argsobj, (jsid)rt->atomState.calleeAtom, &rval); - ok &= js_SetProperty(cx, argsobj, (jsid)rt->atomState.calleeAtom, &rval); - ok &= js_GetProperty(cx, argsobj, (jsid)rt->atomState.lengthAtom, &rval); - ok &= js_SetProperty(cx, argsobj, (jsid)rt->atomState.lengthAtom, &rval); - - /* - * Clear the private pointer to fp, which is about to go away (js_Invoke). - * Do this last because the args_enumerate and js_GetProperty calls above - * need to follow the private slot to find fp. - */ - ok &= JS_SetPrivate(cx, argsobj, NULL); - fp->argsobj = NULL; - return ok; -} - -static JSBool -args_delProperty(JSContext *cx, JSObject *obj, jsval id, jsval *vp) -{ - jsint slot; - JSStackFrame *fp; - - if (!JSVAL_IS_INT(id)) - return JS_TRUE; - fp = (JSStackFrame *) - JS_GetInstancePrivate(cx, obj, &js_ArgumentsClass, NULL); - if (!fp) - return JS_TRUE; - JS_ASSERT(fp->argsobj); - JS_ASSERT(fp->fun); - - slot = JSVAL_TO_INT(id); - switch (slot) { - case ARGS_CALLEE: - case ARGS_LENGTH: - SET_OVERRIDE_BIT(fp, slot); - break; - - default: - if ((uintN)slot < JS_MAX(fp->argc, fp->fun->nargs) && - !MarkArgDeleted(cx, fp, slot)) { - return JS_FALSE; - } - break; - } - return JS_TRUE; -} - -static JSBool -args_getProperty(JSContext *cx, JSObject *obj, jsval id, jsval *vp) -{ - jsint slot; - JSStackFrame *fp; - - if (!JSVAL_IS_INT(id)) - return JS_TRUE; - fp = (JSStackFrame *) - JS_GetInstancePrivate(cx, obj, &js_ArgumentsClass, NULL); - if (!fp) - return JS_TRUE; - JS_ASSERT(fp->argsobj); - JS_ASSERT(fp->fun); - - slot = JSVAL_TO_INT(id); - switch (slot) { - case ARGS_CALLEE: - if (!TEST_OVERRIDE_BIT(fp, slot)) - *vp = fp->argv ? fp->argv[-2] : OBJECT_TO_JSVAL(fp->fun->object); - break; - - case ARGS_LENGTH: - if (!TEST_OVERRIDE_BIT(fp, slot)) - *vp = INT_TO_JSVAL((jsint)fp->argc); - break; - - default: - if ((uintN)slot < JS_MAX(fp->argc, fp->fun->nargs) && - !ArgWasDeleted(cx, fp, slot)) { - *vp = fp->argv[slot]; - } - break; - } - return JS_TRUE; -} - -static JSBool -args_setProperty(JSContext *cx, JSObject *obj, jsval id, jsval *vp) -{ - JSStackFrame *fp; - jsint slot; - - if (!JSVAL_IS_INT(id)) - return JS_TRUE; - fp = (JSStackFrame *) - JS_GetInstancePrivate(cx, obj, &js_ArgumentsClass, NULL); - if (!fp) - return JS_TRUE; - JS_ASSERT(fp->argsobj); - JS_ASSERT(fp->fun); - - slot = JSVAL_TO_INT(id); - switch (slot) { - case ARGS_CALLEE: - case ARGS_LENGTH: - SET_OVERRIDE_BIT(fp, slot); - break; - - default: - if ((uintN)slot < JS_MAX(fp->argc, fp->fun->nargs) && - !ArgWasDeleted(cx, fp, slot)) { - fp->argv[slot] = *vp; - } - break; - } - return JS_TRUE; -} - -static JSBool -args_resolve(JSContext *cx, JSObject *obj, jsval id, uintN flags, - JSObject **objp) -{ - JSStackFrame *fp; - uintN slot; - JSString *str; - JSAtom *atom; - intN tinyid; - jsval value; - - *objp = NULL; - fp = (JSStackFrame *) - JS_GetInstancePrivate(cx, obj, &js_ArgumentsClass, NULL); - if (!fp) - return JS_TRUE; - JS_ASSERT(fp->argsobj); - JS_ASSERT(fp->fun); - - if (JSVAL_IS_INT(id)) { - slot = JSVAL_TO_INT(id); - if (slot < JS_MAX(fp->argc, fp->fun->nargs) && - !ArgWasDeleted(cx, fp, slot)) { - /* XXX ECMA specs DontEnum, contrary to other array-like objects */ - if (!js_DefineProperty(cx, obj, (jsid) id, fp->argv[slot], - args_getProperty, args_setProperty, - JSVERSION_IS_ECMA(cx->version) - ? 0 - : JSPROP_ENUMERATE, - NULL)) { - return JS_FALSE; - } - *objp = obj; - } - } else { - str = JSVAL_TO_STRING(id); - atom = cx->runtime->atomState.lengthAtom; - if (str == ATOM_TO_STRING(atom)) { - tinyid = ARGS_LENGTH; - value = INT_TO_JSVAL(fp->argc); - } else { - atom = cx->runtime->atomState.calleeAtom; - if (str == ATOM_TO_STRING(atom)) { - tinyid = ARGS_CALLEE; - value = fp->argv ? fp->argv[-2] - : OBJECT_TO_JSVAL(fp->fun->object); - } else { - atom = NULL; - - /* Quell GCC overwarnings. */ - tinyid = 0; - value = JSVAL_NULL; - } - } - - if (atom && !TEST_OVERRIDE_BIT(fp, tinyid)) { - if (!js_DefineNativeProperty(cx, obj, (jsid) atom, value, - args_getProperty, args_setProperty, 0, - SPROP_HAS_SHORTID, tinyid, NULL)) { - return JS_FALSE; - } - *objp = obj; - } - } - - return JS_TRUE; -} - -static JSBool -args_enumerate(JSContext *cx, JSObject *obj) -{ - JSStackFrame *fp; - JSObject *pobj; - JSProperty *prop; - uintN slot, nargs; - - fp = (JSStackFrame *) - JS_GetInstancePrivate(cx, obj, &js_ArgumentsClass, NULL); - if (!fp) - return JS_TRUE; - JS_ASSERT(fp->argsobj); - JS_ASSERT(fp->fun); - - /* - * Trigger reflection with value snapshot in args_resolve using a series - * of js_LookupProperty calls. We handle length, callee, and the indexed - * argument properties. We know that args_resolve covers all these cases - * and creates direct properties of obj, but that it may fail to resolve - * length or callee if overridden. - */ - if (!js_LookupProperty(cx, obj, (jsid) cx->runtime->atomState.lengthAtom, - &pobj, &prop)) { - return JS_FALSE; - } - if (prop) - OBJ_DROP_PROPERTY(cx, pobj, prop); - - if (!js_LookupProperty(cx, obj, (jsid) cx->runtime->atomState.calleeAtom, - &pobj, &prop)) { - return JS_FALSE; - } - if (prop) - OBJ_DROP_PROPERTY(cx, pobj, prop); - - nargs = JS_MAX(fp->argc, fp->fun->nargs); - for (slot = 0; slot < nargs; slot++) { - if (!js_LookupProperty(cx, obj, (jsid) INT_TO_JSVAL((jsint)slot), - &pobj, &prop)) { - return JS_FALSE; - } - if (prop) - OBJ_DROP_PROPERTY(cx, pobj, prop); - } - return JS_TRUE; -} - -/* - * The Arguments class is not initialized via JS_InitClass, and must not be, - * because its name is "Object". Per ECMA, that causes instances of it to - * delegate to the object named by Object.prototype. It also ensures that - * arguments.toString() returns "[object Object]". - * - * The JSClass functions below collaborate to lazily reflect and synchronize - * actual argument values, argument count, and callee function object stored - * in a JSStackFrame with their corresponding property values in the frame's - * arguments object. - */ -JSClass js_ArgumentsClass = { - js_Object_str, - JSCLASS_HAS_PRIVATE | JSCLASS_NEW_RESOLVE | JSCLASS_HAS_RESERVED_SLOTS(1), - JS_PropertyStub, args_delProperty, - args_getProperty, args_setProperty, - args_enumerate, (JSResolveOp) args_resolve, - JS_ConvertStub, JS_FinalizeStub, - JSCLASS_NO_OPTIONAL_MEMBERS -}; - -#endif /* JS_HAS_ARGS_OBJECT */ - -#if JS_HAS_CALL_OBJECT - -JSObject * -js_GetCallObject(JSContext *cx, JSStackFrame *fp, JSObject *parent) -{ - JSObject *callobj, *funobj; - - /* Create a call object for fp only if it lacks one. */ - JS_ASSERT(fp->fun); - callobj = fp->callobj; - if (callobj) - return callobj; - JS_ASSERT(fp->fun); - - /* The default call parent is its function's parent (static link). */ - if (!parent) { - funobj = fp->argv ? JSVAL_TO_OBJECT(fp->argv[-2]) : fp->fun->object; - if (funobj) - parent = OBJ_GET_PARENT(cx, funobj); - } - - /* Create the call object and link it to its stack frame. */ - callobj = js_NewObject(cx, &js_CallClass, NULL, parent); - if (!callobj || !JS_SetPrivate(cx, callobj, fp)) { - cx->newborn[GCX_OBJECT] = NULL; - return NULL; - } - fp->callobj = callobj; - - /* Make callobj be the scope chain and the variables object. */ - fp->scopeChain = callobj; - fp->varobj = callobj; - return callobj; -} - -static JSBool -call_enumerate(JSContext *cx, JSObject *obj); - -JSBool -js_PutCallObject(JSContext *cx, JSStackFrame *fp) -{ - JSObject *callobj; - JSBool ok; - jsid argsid; - jsval aval; - - /* - * Reuse call_enumerate here to reflect all actual args and vars into the - * call object from fp. - */ - callobj = fp->callobj; - if (!callobj) - return JS_TRUE; - ok = call_enumerate(cx, callobj); - - /* - * Get the arguments object to snapshot fp's actual argument values. - */ - if (fp->argsobj) { - argsid = (jsid) cx->runtime->atomState.argumentsAtom; - ok &= js_GetProperty(cx, callobj, argsid, &aval); - ok &= js_SetProperty(cx, callobj, argsid, &aval); - ok &= js_PutArgsObject(cx, fp); - } - - /* - * Clear the private pointer to fp, which is about to go away (js_Invoke). - * Do this last because the call_enumerate and js_GetProperty calls above - * need to follow the private slot to find fp. - */ - ok &= JS_SetPrivate(cx, callobj, NULL); - fp->callobj = NULL; - return ok; -} - -static JSPropertySpec call_props[] = { - {js_arguments_str, CALL_ARGUMENTS, JSPROP_PERMANENT,0,0}, - {"__callee__", CALL_CALLEE, 0,0,0}, - {0,0,0,0,0} -}; - -static JSBool -call_getProperty(JSContext *cx, JSObject *obj, jsval id, jsval *vp) -{ - JSStackFrame *fp; - jsint slot; - - if (!JSVAL_IS_INT(id)) - return JS_TRUE; - fp = (JSStackFrame *) JS_GetPrivate(cx, obj); - if (!fp) - return JS_TRUE; - JS_ASSERT(fp->fun); - - slot = JSVAL_TO_INT(id); - switch (slot) { - case CALL_ARGUMENTS: - if (!TEST_OVERRIDE_BIT(fp, slot)) { - JSObject *argsobj = js_GetArgsObject(cx, fp); - if (!argsobj) - return JS_FALSE; - *vp = OBJECT_TO_JSVAL(argsobj); - } - break; - - case CALL_CALLEE: - if (!TEST_OVERRIDE_BIT(fp, slot)) - *vp = fp->argv ? fp->argv[-2] : OBJECT_TO_JSVAL(fp->fun->object); - break; - - default: - if ((uintN)slot < JS_MAX(fp->argc, fp->fun->nargs)) - *vp = fp->argv[slot]; - break; - } - return JS_TRUE; -} - -static JSBool -call_setProperty(JSContext *cx, JSObject *obj, jsval id, jsval *vp) -{ - JSStackFrame *fp; - jsint slot; - - if (!JSVAL_IS_INT(id)) - return JS_TRUE; - fp = (JSStackFrame *) JS_GetPrivate(cx, obj); - if (!fp) - return JS_TRUE; - JS_ASSERT(fp->fun); - - slot = JSVAL_TO_INT(id); - switch (slot) { - case CALL_ARGUMENTS: - case CALL_CALLEE: - SET_OVERRIDE_BIT(fp, slot); - break; - - default: - if ((uintN)slot < JS_MAX(fp->argc, fp->fun->nargs)) - fp->argv[slot] = *vp; - break; - } - return JS_TRUE; -} - -JSBool -js_GetCallVariable(JSContext *cx, JSObject *obj, jsval id, jsval *vp) -{ - JSStackFrame *fp; - - JS_ASSERT(JSVAL_IS_INT(id)); - fp = (JSStackFrame *) JS_GetPrivate(cx, obj); - if (fp) { - /* XXX no jsint slot commoning here to avoid MSVC1.52 crashes */ - if ((uintN)JSVAL_TO_INT(id) < fp->nvars) - *vp = fp->vars[JSVAL_TO_INT(id)]; - } - return JS_TRUE; -} - -JSBool -js_SetCallVariable(JSContext *cx, JSObject *obj, jsval id, jsval *vp) -{ - JSStackFrame *fp; - - JS_ASSERT(JSVAL_IS_INT(id)); - fp = (JSStackFrame *) JS_GetPrivate(cx, obj); - if (fp) { - /* XXX jsint slot is block-local here to avoid MSVC1.52 crashes */ - jsint slot = JSVAL_TO_INT(id); - if ((uintN)slot < fp->nvars) - fp->vars[slot] = *vp; - } - return JS_TRUE; -} - -static JSBool -call_enumerate(JSContext *cx, JSObject *obj) -{ - JSStackFrame *fp; - JSObject *funobj; - JSScope *scope; - JSScopeProperty *sprop, *cprop; - JSPropertyOp getter; - jsval *vec; - JSProperty *prop; - - fp = (JSStackFrame *) JS_GetPrivate(cx, obj); - if (!fp) - return JS_TRUE; - - /* - * Do not enumerate a cloned function object at fp->argv[-2], it may have - * gained its own (mutable) scope (e.g., a brutally-shared XUL script sets - * the clone's prototype property). We must enumerate the function object - * that was decorated with parameter and local variable properties by the - * compiler when the compiler created fp->fun, namely fp->fun->object. - * - * Contrast with call_resolve, where we prefer fp->argv[-2], because we'll - * use js_LookupProperty to find any overridden properties in that object, - * if it was a mutated clone; and if not, we will search its prototype, - * fp->fun->object, to find compiler-created params and locals. - */ - funobj = fp->fun->object; - if (!funobj) - return JS_TRUE; - - /* - * Reflect actual args from fp->argv for formal parameters, and local vars - * and functions in fp->vars for declared variables and nested-at-top-level - * local functions. - */ - scope = OBJ_SCOPE(funobj); - for (sprop = SCOPE_LAST_PROP(scope); sprop; sprop = sprop->parent) { - getter = sprop->getter; - if (getter == js_GetArgument) - vec = fp->argv; - else if (getter == js_GetLocalVariable) - vec = fp->vars; - else - continue; - - /* Trigger reflection in call_resolve by doing a lookup. */ - if (!js_LookupProperty(cx, obj, sprop->id, &obj, &prop)) - return JS_FALSE; - JS_ASSERT(obj && prop); - cprop = (JSScopeProperty *)prop; - LOCKED_OBJ_SET_SLOT(obj, cprop->slot, vec[sprop->shortid]); - OBJ_DROP_PROPERTY(cx, obj, prop); - } - - return JS_TRUE; -} - -static JSBool -call_resolve(JSContext *cx, JSObject *obj, jsval id, uintN flags, - JSObject **objp) -{ - JSStackFrame *fp; - JSObject *funobj; - JSString *str; - JSAtom *atom; - JSObject *obj2; - JSScopeProperty *sprop; - jsid propid; - JSPropertyOp getter, setter; - uintN attrs, slot, nslots, spflags; - jsval *vp, value; - intN shortid; - - fp = (JSStackFrame *) JS_GetPrivate(cx, obj); - if (!fp) - return JS_TRUE; - JS_ASSERT(fp->fun); - - if (!JSVAL_IS_STRING(id)) - return JS_TRUE; - - funobj = fp->argv ? JSVAL_TO_OBJECT(fp->argv[-2]) : fp->fun->object; - if (!funobj) - return JS_TRUE; - - str = JSVAL_TO_STRING(id); - atom = js_AtomizeString(cx, str, 0); - if (!atom) - return JS_FALSE; - if (!js_LookupProperty(cx, funobj, (jsid)atom, &obj2, - (JSProperty **)&sprop)) { - return JS_FALSE; - } - - if (sprop && OBJ_IS_NATIVE(obj2)) { - propid = sprop->id; - getter = sprop->getter; - attrs = sprop->attrs & ~JSPROP_SHARED; - slot = (uintN) sprop->shortid; - OBJ_DROP_PROPERTY(cx, obj2, (JSProperty *)sprop); - if (getter == js_GetArgument || getter == js_GetLocalVariable) { - if (getter == js_GetArgument) { - vp = fp->argv; - nslots = JS_MAX(fp->argc, fp->fun->nargs); - getter = setter = NULL; - } else { - vp = fp->vars; - nslots = fp->nvars; - getter = js_GetCallVariable; - setter = js_SetCallVariable; - } - if (slot < nslots) { - value = vp[slot]; - spflags = SPROP_HAS_SHORTID; - shortid = (intN) slot; - } else { - value = JSVAL_VOID; - spflags = 0; - shortid = 0; - } - if (!js_DefineNativeProperty(cx, obj, propid, value, - getter, setter, attrs, - spflags, shortid, NULL)) { - return JS_FALSE; - } - *objp = obj; - } - } - return JS_TRUE; -} - -static JSBool -call_convert(JSContext *cx, JSObject *obj, JSType type, jsval *vp) -{ - JSStackFrame *fp; - - if (type == JSTYPE_FUNCTION) { - fp = (JSStackFrame *) JS_GetPrivate(cx, obj); - if (fp) { - JS_ASSERT(fp->fun); - *vp = fp->argv ? fp->argv[-2] : OBJECT_TO_JSVAL(fp->fun->object); - } - } - return JS_TRUE; -} - -JSClass js_CallClass = { - js_Call_str, - JSCLASS_HAS_PRIVATE | JSCLASS_NEW_RESOLVE, - JS_PropertyStub, JS_PropertyStub, - call_getProperty, call_setProperty, - call_enumerate, (JSResolveOp)call_resolve, - call_convert, JS_FinalizeStub, - JSCLASS_NO_OPTIONAL_MEMBERS -}; - -#endif /* JS_HAS_CALL_OBJECT */ - -/* SHARED because fun_getProperty always computes a new value. */ -#define FUNCTION_PROP_ATTRS (JSPROP_READONLY|JSPROP_PERMANENT|JSPROP_SHARED) - -static JSPropertySpec function_props[] = { - {js_arguments_str, CALL_ARGUMENTS, FUNCTION_PROP_ATTRS,0,0}, - {js_arity_str, FUN_ARITY, FUNCTION_PROP_ATTRS,0,0}, - {js_length_str, ARGS_LENGTH, FUNCTION_PROP_ATTRS,0,0}, - {js_name_str, FUN_NAME, FUNCTION_PROP_ATTRS,0,0}, - {js_caller_str, FUN_CALLER, FUNCTION_PROP_ATTRS,0,0}, - {0,0,0,0,0} -}; - -static JSBool -fun_getProperty(JSContext *cx, JSObject *obj, jsval id, jsval *vp) -{ - jsint slot; - JSFunction *fun; - JSStackFrame *fp; -#if defined _MSC_VER &&_MSC_VER <= 800 - /* MSVC1.5 coredumps */ - jsval bogus = *vp; -#endif - - if (!JSVAL_IS_INT(id)) - return JS_TRUE; - slot = JSVAL_TO_INT(id); - - /* No valid function object should lack private data, but check anyway. */ - fun = (JSFunction *)JS_GetInstancePrivate(cx, obj, &js_FunctionClass, NULL); - if (!fun) - return JS_TRUE; - - /* Find fun's top-most activation record. */ - for (fp = cx->fp; fp && (fp->fun != fun || (fp->flags & JSFRAME_SPECIAL)); - fp = fp->down) { - continue; - } - - switch (slot) { - case CALL_ARGUMENTS: -#if JS_HAS_ARGS_OBJECT - /* Warn if strict about f.arguments or equivalent unqualified uses. */ - if (!JS_ReportErrorFlagsAndNumber(cx, - JSREPORT_WARNING | JSREPORT_STRICT, - js_GetErrorMessage, NULL, - JSMSG_DEPRECATED_USAGE, - js_arguments_str)) { - return JS_FALSE; - } - if (fp) { - if (!js_GetArgsValue(cx, fp, vp)) - return JS_FALSE; - } else { - *vp = JSVAL_NULL; - } - break; -#else /* !JS_HAS_ARGS_OBJECT */ - *vp = OBJECT_TO_JSVAL(fp ? obj : NULL); - break; -#endif /* !JS_HAS_ARGS_OBJECT */ - - case ARGS_LENGTH: - if (!JSVERSION_IS_ECMA(cx->version)) - *vp = INT_TO_JSVAL((jsint)(fp && fp->fun ? fp->argc : fun->nargs)); - else - case FUN_ARITY: - *vp = INT_TO_JSVAL((jsint)fun->nargs); - break; - - case FUN_NAME: - *vp = fun->atom - ? ATOM_KEY(fun->atom) - : STRING_TO_JSVAL(cx->runtime->emptyString); - break; - - case FUN_CALLER: - while (fp && (fp->flags & JSFRAME_SKIP_CALLER) && fp->down) - fp = fp->down; - if (fp && fp->down && fp->down->fun && fp->down->argv) - *vp = fp->down->argv[-2]; - else - *vp = JSVAL_NULL; - if (!JSVAL_IS_PRIMITIVE(*vp) && cx->runtime->checkObjectAccess) { - id = ATOM_KEY(cx->runtime->atomState.callerAtom); - if (!cx->runtime->checkObjectAccess(cx, obj, id, JSACC_READ, vp)) - return JS_FALSE; - } - break; - - default: - /* XXX fun[0] and fun.arguments[0] are equivalent. */ - if (fp && fp->fun && (uintN)slot < fp->fun->nargs) -#if defined _MSC_VER &&_MSC_VER <= 800 - /* MSVC1.5 coredumps */ - if (bogus == *vp) -#endif - *vp = fp->argv[slot]; - break; - } - - return JS_TRUE; -} - -static JSBool -fun_resolve(JSContext *cx, JSObject *obj, jsval id, uintN flags, - JSObject **objp) -{ - JSFunction *fun; - JSString *str; - JSAtom *prototypeAtom; - - if (!JSVAL_IS_STRING(id)) - return JS_TRUE; - - /* No valid function object should lack private data, but check anyway. */ - fun = (JSFunction *)JS_GetInstancePrivate(cx, obj, &js_FunctionClass, NULL); - if (!fun || !fun->object) - return JS_TRUE; - - /* No need to reflect fun.prototype in 'fun.prototype = ...'. */ - if (flags & JSRESOLVE_ASSIGNING) - return JS_TRUE; - - /* - * Ok, check whether id is 'prototype' and bootstrap the function object's - * prototype property. - */ - str = JSVAL_TO_STRING(id); - prototypeAtom = cx->runtime->atomState.classPrototypeAtom; - if (str == ATOM_TO_STRING(prototypeAtom)) { - JSObject *proto, *parentProto; - jsval pval; - - proto = parentProto = NULL; - if (fun->object != obj && fun->object) { - /* - * Clone of a function: make its prototype property value have the - * same class as the clone-parent's prototype. - */ - if (!OBJ_GET_PROPERTY(cx, fun->object, (jsid)prototypeAtom, &pval)) - return JS_FALSE; - if (JSVAL_IS_OBJECT(pval)) - parentProto = JSVAL_TO_OBJECT(pval); - } - - /* - * Beware of the wacky case of a user function named Object -- trying - * to find a prototype for that will recur back here ad perniciem. - */ - if (!parentProto && fun->atom == cx->runtime->atomState.ObjectAtom) - return JS_TRUE; - - /* - * If resolving "prototype" in a clone, clone the parent's prototype. - * Pass the constructor's (obj's) parent as the prototype parent, to - * avoid defaulting to parentProto.constructor.__parent__. - */ - proto = js_NewObject(cx, &js_ObjectClass, parentProto, - OBJ_GET_PARENT(cx, obj)); - if (!proto) - return JS_FALSE; - - /* - * ECMA says that constructor.prototype is DontEnum | DontDelete for - * user-defined functions, but DontEnum | ReadOnly | DontDelete for - * native "system" constructors such as Object or Function. So lazily - * set the former here in fun_resolve, but eagerly define the latter - * in JS_InitClass, with the right attributes. - */ - if (!js_SetClassPrototype(cx, obj, proto, JSPROP_PERMANENT)) { - cx->newborn[GCX_OBJECT] = NULL; - return JS_FALSE; - } - *objp = obj; - } - - return JS_TRUE; -} - -static JSBool -fun_convert(JSContext *cx, JSObject *obj, JSType type, jsval *vp) -{ - switch (type) { - case JSTYPE_FUNCTION: - *vp = OBJECT_TO_JSVAL(obj); - return JS_TRUE; - default: - return js_TryValueOf(cx, obj, type, vp); - } -} - -static void -fun_finalize(JSContext *cx, JSObject *obj) -{ - JSFunction *fun; - - /* No valid function object should lack private data, but check anyway. */ - fun = (JSFunction *) JS_GetPrivate(cx, obj); - if (!fun) - return; - if (fun->object == obj) - fun->object = NULL; - JS_ATOMIC_DECREMENT(&fun->nrefs); - if (fun->nrefs) - return; - if (fun->script) - js_DestroyScript(cx, fun->script); - JS_free(cx, fun); -} - -#if JS_HAS_XDR - -#include "jsxdrapi.h" - -enum { - JSXDR_FUNARG = 1, - JSXDR_FUNVAR = 2, - JSXDR_FUNCONST = 3 -}; - -/* XXX store parent and proto, if defined */ -static JSBool -fun_xdrObject(JSXDRState *xdr, JSObject **objp) -{ - JSContext *cx; - JSFunction *fun; - JSString *atomstr; - char *propname; - JSScopeProperty *sprop; - uint32 userid; /* NB: holds a signed int-tagged jsval */ - JSAtom *atom; - uintN i, n, dupflag; - uint32 type; -#ifdef DEBUG - uintN nvars = 0, nargs = 0; -#endif - - cx = xdr->cx; - if (xdr->mode == JSXDR_ENCODE) { - /* - * No valid function object should lack private data, but fail soft - * (return true, no error report) in case one does due to API pilot - * or internal error. - */ - fun = (JSFunction *) JS_GetPrivate(cx, *objp); - if (!fun) - return JS_TRUE; - atomstr = fun->atom ? ATOM_TO_STRING(fun->atom) : NULL; - } else { - fun = js_NewFunction(cx, NULL, NULL, 0, 0, NULL, NULL); - if (!fun) - return JS_FALSE; - atomstr = NULL; - } - - if (!JS_XDRStringOrNull(xdr, &atomstr) || - !JS_XDRUint16(xdr, &fun->nargs) || - !JS_XDRUint16(xdr, &fun->extra) || - !JS_XDRUint16(xdr, &fun->nvars) || - !JS_XDRUint8(xdr, &fun->flags)) { - return JS_FALSE; - } - - /* do arguments and local vars */ - if (fun->object) { - n = fun->nargs + fun->nvars; - if (xdr->mode == JSXDR_ENCODE) { - JSScope *scope; - JSScopeProperty **spvec, *auto_spvec[8]; - void *mark; - - if (n <= sizeof auto_spvec / sizeof auto_spvec[0]) { - spvec = auto_spvec; - mark = NULL; - } else { - mark = JS_ARENA_MARK(&cx->tempPool); - JS_ARENA_ALLOCATE_CAST(spvec, JSScopeProperty **, &cx->tempPool, - n * sizeof(JSScopeProperty *)); - if (!spvec) { - JS_ReportOutOfMemory(cx); - return JS_FALSE; - } - } - scope = OBJ_SCOPE(fun->object); - for (sprop = SCOPE_LAST_PROP(scope); sprop; - sprop = sprop->parent) { - if (sprop->getter == js_GetArgument) { - JS_ASSERT(nargs++ <= fun->nargs); - spvec[sprop->shortid] = sprop; - } else if (sprop->getter == js_GetLocalVariable) { - JS_ASSERT(nvars++ <= fun->nvars); - spvec[fun->nargs + sprop->shortid] = sprop; - } - } - for (i = 0; i < n; i++) { - sprop = spvec[i]; - JS_ASSERT(sprop->flags & SPROP_HAS_SHORTID); - type = (i < fun->nargs) - ? JSXDR_FUNARG - : (sprop->attrs & JSPROP_READONLY) - ? JSXDR_FUNCONST - : JSXDR_FUNVAR; - userid = INT_TO_JSVAL(sprop->shortid); - /* XXX lossy conversion, need new XDR version for ECMAv3 */ - propname = JS_GetStringBytes(ATOM_TO_STRING((JSAtom *)sprop->id)); - if (!propname || - !JS_XDRUint32(xdr, &type) || - !JS_XDRUint32(xdr, &userid) || - !JS_XDRCString(xdr, &propname)) { - if (mark) - JS_ARENA_RELEASE(&cx->tempPool, mark); - return JS_FALSE; - } - } - if (mark) - JS_ARENA_RELEASE(&cx->tempPool, mark); - } else { - JSPropertyOp getter, setter; - - for (i = n; i != 0; i--) { - uintN attrs = JSPROP_ENUMERATE | JSPROP_PERMANENT; - - if (!JS_XDRUint32(xdr, &type) || - !JS_XDRUint32(xdr, &userid) || - !JS_XDRCString(xdr, &propname)) { - return JS_FALSE; - } - JS_ASSERT(type == JSXDR_FUNARG || type == JSXDR_FUNVAR || - type == JSXDR_FUNCONST); - if (type == JSXDR_FUNARG) { - getter = js_GetArgument; - setter = js_SetArgument; - JS_ASSERT(nargs++ <= fun->nargs); - } else if (type == JSXDR_FUNVAR || type == JSXDR_FUNCONST) { - getter = js_GetLocalVariable; - setter = js_SetLocalVariable; - if (type == JSXDR_FUNCONST) - attrs |= JSPROP_READONLY; - JS_ASSERT(nvars++ <= fun->nvars); - } else { - getter = NULL; - setter = NULL; - } - atom = js_Atomize(cx, propname, strlen(propname), 0); - JS_free(cx, propname); - if (!atom) - return JS_FALSE; - - /* Flag duplicate argument if atom is bound in fun->object. */ - dupflag = SCOPE_GET_PROPERTY(OBJ_SCOPE(fun->object), (jsid)atom) - ? SPROP_IS_DUPLICATE - : 0; - - if (!js_AddNativeProperty(cx, fun->object, (jsid)atom, - getter, setter, SPROP_INVALID_SLOT, - attrs | JSPROP_SHARED, - SPROP_HAS_SHORTID | dupflag, - JSVAL_TO_INT(userid))) { - return JS_FALSE; - } - } - } - } - - if (!js_XDRScript(xdr, &fun->script, NULL)) - return JS_FALSE; - - if (xdr->mode == JSXDR_DECODE) { - *objp = fun->object; - if (atomstr) { - fun->atom = js_AtomizeString(cx, atomstr, 0); - if (!fun->atom) - return JS_FALSE; - - if (!OBJ_DEFINE_PROPERTY(cx, cx->globalObject, - (jsid)fun->atom, OBJECT_TO_JSVAL(*objp), - NULL, NULL, JSPROP_ENUMERATE, - NULL)) { - return JS_FALSE; - } - } - - js_CallNewScriptHook(cx, fun->script, fun); - } - - return JS_TRUE; -} - -#else /* !JS_HAS_XDR */ - -#define fun_xdrObject NULL - -#endif /* !JS_HAS_XDR */ - -#if JS_HAS_INSTANCEOF - -/* - * [[HasInstance]] internal method for Function objects: fetch the .prototype - * property of its 'this' parameter, and walks the prototype chain of v (only - * if v is an object) returning true if .prototype is found. - */ -static JSBool -fun_hasInstance(JSContext *cx, JSObject *obj, jsval v, JSBool *bp) -{ - jsval pval, cval; - JSString *str; - JSObject *proto, *obj2; - JSFunction *cfun, *ofun; - - if (!OBJ_GET_PROPERTY(cx, obj, - (jsid)cx->runtime->atomState.classPrototypeAtom, - &pval)) { - return JS_FALSE; - } - - if (JSVAL_IS_PRIMITIVE(pval)) { - /* - * Throw a runtime error if instanceof is called on a function that - * has a non-object as its .prototype value. - */ - str = js_DecompileValueGenerator(cx, -1, OBJECT_TO_JSVAL(obj), NULL); - if (str) { - JS_ReportErrorNumber(cx, js_GetErrorMessage, NULL, - JSMSG_BAD_PROTOTYPE, JS_GetStringBytes(str)); - } - return JS_FALSE; - } - - proto = JSVAL_TO_OBJECT(pval); - if (!js_IsDelegate(cx, proto, v, bp)) - return JS_FALSE; - - if (!*bp && !JSVAL_IS_PRIMITIVE(v)) { - /* - * Extension for "brutal sharing" of standard class constructors: if - * a script is compiled using a single, shared set of constructors, in - * particular Function and RegExp, but executed many times using other - * sets of standard constructors, then (/re/ instanceof RegExp), e.g., - * will be false. - * - * We extend instanceof in this case to look for a matching native or - * script underlying the function object found in the 'constructor' - * property of the object in question (which is JSVAL_TO_OBJECT(v)), - * or found in the 'constructor' property of one of its prototypes. - * - * See also jsexn.c, where the *Error constructors are defined, each - * with its own native function, to satisfy (e instanceof Error) even - * when exceptions cross standard-class sharing boundaries. Note that - * Error.prototype may not lie on e's __proto__ chain in that case. - */ - obj2 = JSVAL_TO_OBJECT(v); - do { - if (!OBJ_GET_PROPERTY(cx, obj2, - (jsid)cx->runtime->atomState.constructorAtom, - &cval)) { - return JS_FALSE; - } - - if (JSVAL_IS_FUNCTION(cx, cval)) { - cfun = (JSFunction *) JS_GetPrivate(cx, JSVAL_TO_OBJECT(cval)); - ofun = (JSFunction *) JS_GetPrivate(cx, obj); - if (cfun->native == ofun->native && - cfun->script == ofun->script) { - *bp = JS_TRUE; - break; - } - } - } while ((obj2 = OBJ_GET_PROTO(cx, obj2)) != NULL); - } - - return JS_TRUE; -} - -#else /* !JS_HAS_INSTANCEOF */ - -#define fun_hasInstance NULL - -#endif /* !JS_HAS_INSTANCEOF */ - -static uint32 -fun_mark(JSContext *cx, JSObject *obj, void *arg) -{ - JSFunction *fun; - - fun = (JSFunction *) JS_GetPrivate(cx, obj); - if (fun) { - if (fun->atom) - GC_MARK_ATOM(cx, fun->atom, arg); - if (fun->script) - js_MarkScript(cx, fun->script, arg); - } - return 0; -} - -/* - * Reserve two slots in all function objects for XPConnect. Note that this - * does not bloat every instance, only those on which reserved slots are set, - * and those on which ad-hoc properties are defined. - */ -JSClass js_FunctionClass = { - js_Function_str, - JSCLASS_HAS_PRIVATE | JSCLASS_NEW_RESOLVE | JSCLASS_HAS_RESERVED_SLOTS(2), - JS_PropertyStub, JS_PropertyStub, - fun_getProperty, JS_PropertyStub, - JS_EnumerateStub, (JSResolveOp)fun_resolve, - fun_convert, fun_finalize, - NULL, NULL, - NULL, NULL, - fun_xdrObject, fun_hasInstance, - fun_mark, 0 -}; - -JSBool -js_fun_toString(JSContext *cx, JSObject *obj, uint32 indent, - uintN argc, jsval *argv, jsval *rval) -{ - jsval fval; - JSFunction *fun; - JSString *str; - - if (!argv) { - JS_ASSERT(JS_ObjectIsFunction(cx, obj)); - } else { - fval = argv[-1]; - if (!JSVAL_IS_FUNCTION(cx, fval)) { - /* - * If we don't have a function to start off with, try converting - * the object to a function. If that doesn't work, complain. - */ - if (JSVAL_IS_OBJECT(fval)) { - obj = JSVAL_TO_OBJECT(fval); - if (!OBJ_GET_CLASS(cx, obj)->convert(cx, obj, JSTYPE_FUNCTION, - &fval)) { - return JS_FALSE; - } - } - if (!JSVAL_IS_FUNCTION(cx, fval)) { - JS_ReportErrorNumber(cx, js_GetErrorMessage, NULL, - JSMSG_INCOMPATIBLE_PROTO, - js_Function_str, js_toString_str, - JS_GetTypeName(cx, - JS_TypeOfValue(cx, fval))); - return JS_FALSE; - } - } - - obj = JSVAL_TO_OBJECT(fval); - } - - fun = (JSFunction *) JS_GetPrivate(cx, obj); - if (!fun) - return JS_TRUE; - if (argc && !js_ValueToECMAUint32(cx, argv[0], &indent)) - return JS_FALSE; - str = JS_DecompileFunction(cx, fun, (uintN)indent); - if (!str) - return JS_FALSE; - *rval = STRING_TO_JSVAL(str); - return JS_TRUE; -} - -static JSBool -fun_toString(JSContext *cx, JSObject *obj, uintN argc, jsval *argv, jsval *rval) -{ - return js_fun_toString(cx, obj, 0, argc, argv, rval); -} - -#if JS_HAS_TOSOURCE -static JSBool -fun_toSource(JSContext *cx, JSObject *obj, uintN argc, jsval *argv, jsval *rval) -{ - return js_fun_toString(cx, obj, JS_DONT_PRETTY_PRINT, argc, argv, rval); -} -#endif - -static const char js_call_str[] = "call"; - -#if JS_HAS_CALL_FUNCTION -static JSBool -fun_call(JSContext *cx, JSObject *obj, uintN argc, jsval *argv, jsval *rval) -{ - jsval fval, *sp, *oldsp; - void *mark; - uintN i; - JSStackFrame *fp; - JSBool ok; - - if (!OBJ_DEFAULT_VALUE(cx, obj, JSTYPE_FUNCTION, &argv[-1])) - return JS_FALSE; - fval = argv[-1]; - - if (!JSVAL_IS_FUNCTION(cx, fval)) { - JS_ReportErrorNumber(cx, js_GetErrorMessage, NULL, - JSMSG_INCOMPATIBLE_PROTO, - js_Function_str, js_call_str, - JS_GetStringBytes(JS_ValueToString(cx, fval))); - return JS_FALSE; - } - - if (argc == 0) { - /* Call fun with its parent as the 'this' parameter if no args. */ - obj = OBJ_GET_PARENT(cx, obj); - } else { - /* Otherwise convert the first arg to 'this' and skip over it. */ - if (!js_ValueToObject(cx, argv[0], &obj)) - return JS_FALSE; - argc--; - argv++; - } - - /* Allocate stack space for fval, obj, and the args. */ - sp = js_AllocStack(cx, 2 + argc, &mark); - if (!sp) - return JS_FALSE; - - /* Push fval, obj, and the args. */ - *sp++ = fval; - *sp++ = OBJECT_TO_JSVAL(obj); - for (i = 0; i < argc; i++) - *sp++ = argv[i]; - - /* Lift current frame to include the args and do the call. */ - fp = cx->fp; - oldsp = fp->sp; - fp->sp = sp; - ok = js_Invoke(cx, argc, JSINVOKE_INTERNAL | JSINVOKE_SKIP_CALLER); - - /* Store rval and pop stack back to our frame's sp. */ - *rval = fp->sp[-1]; - fp->sp = oldsp; - js_FreeStack(cx, mark); - return ok; -} -#endif /* JS_HAS_CALL_FUNCTION */ - -#if JS_HAS_APPLY_FUNCTION -static JSBool -fun_apply(JSContext *cx, JSObject *obj, uintN argc, jsval *argv, jsval *rval) -{ - jsval fval, *sp, *oldsp; - JSObject *aobj; - jsuint length; - void *mark; - uintN i; - JSBool ok; - JSStackFrame *fp; - - if (argc == 0) { - /* Will get globalObject as 'this' and no other agurments. */ - return fun_call(cx, obj, argc, argv, rval); - } - - if (!OBJ_DEFAULT_VALUE(cx, obj, JSTYPE_FUNCTION, &argv[-1])) - return JS_FALSE; - fval = argv[-1]; - - if (!JSVAL_IS_FUNCTION(cx, fval)) { - JS_ReportErrorNumber(cx, js_GetErrorMessage, NULL, - JSMSG_INCOMPATIBLE_PROTO, - js_Function_str, "apply", - JS_GetStringBytes(JS_ValueToString(cx, fval))); - return JS_FALSE; - } - - /* Quell GCC overwarnings. */ - aobj = NULL; - length = 0; - - if (argc >= 2) { - /* If the 2nd arg is null or void, call the function with 0 args. */ - if (JSVAL_IS_NULL(argv[1]) || JSVAL_IS_VOID(argv[1])) { - argc = 0; - } else { - /* The second arg must be an array (or arguments object). */ - if (JSVAL_IS_PRIMITIVE(argv[1]) || - (aobj = JSVAL_TO_OBJECT(argv[1]), - OBJ_GET_CLASS(cx, aobj) != &js_ArgumentsClass && - OBJ_GET_CLASS(cx, aobj) != &js_ArrayClass)) - { - JS_ReportErrorNumber(cx, js_GetErrorMessage, NULL, - JSMSG_BAD_APPLY_ARGS); - return JS_FALSE; - } - if (!js_GetLengthProperty(cx, aobj, &length)) - return JS_FALSE; - } - } - - /* Convert the first arg to 'this' and skip over it. */ - if (!js_ValueToObject(cx, argv[0], &obj)) - return JS_FALSE; - - /* Allocate stack space for fval, obj, and the args. */ - argc = (uintN)JS_MIN(length, ARGC_LIMIT - 1); - sp = js_AllocStack(cx, 2 + argc, &mark); - if (!sp) - return JS_FALSE; - - /* Push fval, obj, and aobj's elements as args. */ - *sp++ = fval; - *sp++ = OBJECT_TO_JSVAL(obj); - for (i = 0; i < argc; i++) { - ok = JS_GetElement(cx, aobj, (jsint)i, sp); - if (!ok) - goto out; - sp++; - } - - /* Lift current frame to include the args and do the call. */ - fp = cx->fp; - oldsp = fp->sp; - fp->sp = sp; - ok = js_Invoke(cx, argc, JSINVOKE_INTERNAL | JSINVOKE_SKIP_CALLER); - - /* Store rval and pop stack back to our frame's sp. */ - *rval = fp->sp[-1]; - fp->sp = oldsp; -out: - js_FreeStack(cx, mark); - return ok; -} -#endif /* JS_HAS_APPLY_FUNCTION */ - -static JSFunctionSpec function_methods[] = { -#if JS_HAS_TOSOURCE - {js_toSource_str, fun_toSource, 0,0,0}, -#endif - {js_toString_str, fun_toString, 1,0,0}, -#if JS_HAS_APPLY_FUNCTION - {"apply", fun_apply, 2,0,0}, -#endif -#if JS_HAS_CALL_FUNCTION - {js_call_str, fun_call, 1,0,0}, -#endif - {0,0,0,0,0} -}; - -JSBool -js_IsIdentifier(JSString *str) -{ - size_t n; - jschar *s, c; - - n = JSSTRING_LENGTH(str); - if (n == 0) - return JS_FALSE; - s = JSSTRING_CHARS(str); - c = *s; - if (!JS_ISIDENT_START(c)) - return JS_FALSE; - for (n--; n != 0; n--) { - c = *++s; - if (!JS_ISIDENT(c)) - return JS_FALSE; - } - return JS_TRUE; -} - -static JSBool -Function(JSContext *cx, JSObject *obj, uintN argc, jsval *argv, jsval *rval) -{ - JSStackFrame *fp, *caller; - JSFunction *fun; - JSObject *parent; - uintN i, n, lineno, dupflag; - JSAtom *atom; - const char *filename; - JSObject *obj2; - JSScopeProperty *sprop; - JSString *str, *arg; - void *mark; - JSTokenStream *ts; - JSPrincipals *principals; - jschar *collected_args, *cp; - size_t arg_length, args_length; - JSTokenType tt; - JSBool ok; - - fp = cx->fp; - if (fp && !(fp->flags & JSFRAME_CONSTRUCTING)) { - obj = js_NewObject(cx, &js_FunctionClass, NULL, NULL); - if (!obj) - return JS_FALSE; - *rval = OBJECT_TO_JSVAL(obj); - } - fun = (JSFunction *) JS_GetPrivate(cx, obj); - if (fun) - return JS_TRUE; - -#if JS_HAS_CALL_OBJECT - /* - * NB: (new Function) is not lexically closed by its caller, it's just an - * anonymous function in the top-level scope that its constructor inhabits. - * Thus 'var x = 42; f = new Function("return x"); print(f())' prints 42, - * and so would a call to f from another top-level's script or function. - * - * In older versions, before call objects, a new Function was adopted by - * its running context's globalObject, which might be different from the - * top-level reachable from scopeChain (in HTML frames, e.g.). - */ - parent = OBJ_GET_PARENT(cx, JSVAL_TO_OBJECT(argv[-2])); -#else - /* Set up for dynamic parenting (see js_Invoke in jsinterp.c). */ - parent = NULL; -#endif - - fun = js_NewFunction(cx, obj, NULL, 0, JSFUN_LAMBDA, parent, - JSVERSION_IS_ECMA(cx->version) - ? cx->runtime->atomState.anonymousAtom - : NULL); - - if (!fun) - return JS_FALSE; - - /* - * Function is static and not called directly by other functions in this - * file, therefore it is callable only as a native function by js_Invoke. - * Find the scripted caller, possibly skipping other native frames such as - * are built for Function.prototype.call or .apply activations that invoke - * Function indirectly from a script. - */ - JS_ASSERT(!fp->script && fp->fun && fp->fun->native == Function); - caller = JS_GetScriptedCaller(cx, fp); - if (caller) { - filename = caller->script->filename; - lineno = js_PCToLineNumber(cx, caller->script, caller->pc); - principals = JS_EvalFramePrincipals(cx, fp, caller); - } else { - filename = NULL; - lineno = 0; - principals = NULL; - } - - n = argc ? argc - 1 : 0; - if (n > 0) { - /* - * Collect the function-argument arguments into one string, separated - * by commas, then make a tokenstream from that string, and scan it to - * get the arguments. We need to throw the full scanner at the - * problem, because the argument string can legitimately contain - * comments and linefeeds. XXX It might be better to concatenate - * everything up into a function definition and pass it to the - * compiler, but doing it this way is less of a delta from the old - * code. See ECMA 15.3.2.1. - */ - args_length = 0; - for (i = 0; i < n; i++) { - /* Collect the lengths for all the function-argument arguments. */ - arg = js_ValueToString(cx, argv[i]); - if (!arg) - return JS_FALSE; - argv[i] = STRING_TO_JSVAL(arg); - args_length += JSSTRING_LENGTH(arg); - } - /* Add 1 for each joining comma. */ - args_length += n - 1; - - /* - * Allocate a string to hold the concatenated arguments, including room - * for a terminating 0. Mark cx->tempPool for later release, to free - * collected_args and its tokenstream in one swoop. - */ - mark = JS_ARENA_MARK(&cx->tempPool); - JS_ARENA_ALLOCATE_CAST(cp, jschar *, &cx->tempPool, - (args_length+1) * sizeof(jschar)); - if (!cp) - return JS_FALSE; - collected_args = cp; - - /* - * Concatenate the arguments into the new string, separated by commas. - */ - for (i = 0; i < n; i++) { - arg = JSVAL_TO_STRING(argv[i]); - arg_length = JSSTRING_LENGTH(arg); - (void) js_strncpy(cp, JSSTRING_CHARS(arg), arg_length); - cp += arg_length; - - /* Add separating comma or terminating 0. */ - *cp++ = (i + 1 < n) ? ',' : 0; - } - - /* - * Make a tokenstream (allocated from cx->tempPool) that reads from - * the given string. - */ - ts = js_NewTokenStream(cx, collected_args, args_length, filename, - lineno, principals); - if (!ts) { - JS_ARENA_RELEASE(&cx->tempPool, mark); - return JS_FALSE; - } - - /* The argument string may be empty or contain no tokens. */ - tt = js_GetToken(cx, ts); - if (tt != TOK_EOF) { - for (;;) { - /* - * Check that it's a name. This also implicitly guards against - * TOK_ERROR, which was already reported. - */ - if (tt != TOK_NAME) - goto bad_formal; - - /* - * Get the atom corresponding to the name from the tokenstream; - * we're assured at this point that it's a valid identifier. - */ - atom = CURRENT_TOKEN(ts).t_atom; - if (!js_LookupProperty(cx, obj, (jsid)atom, &obj2, - (JSProperty **)&sprop)) { - goto bad_formal; - } - dupflag = 0; - if (sprop) { - ok = JS_TRUE; - if (obj2 == obj) { - const char *name = js_AtomToPrintableString(cx, atom); - - /* - * A duplicate parameter name. We force a duplicate - * node on the SCOPE_LAST_PROP(scope) list with the - * same id, distinguished by the SPROP_IS_DUPLICATE - * flag, and not mapped by an entry in scope. - */ - JS_ASSERT(sprop->getter == js_GetArgument); - ok = name && - js_ReportCompileErrorNumber(cx, ts, NULL, - JSREPORT_WARNING | - JSREPORT_STRICT, - JSMSG_DUPLICATE_FORMAL, - name); - - dupflag = SPROP_IS_DUPLICATE; - } - OBJ_DROP_PROPERTY(cx, obj2, (JSProperty *)sprop); - if (!ok) - goto bad_formal; - sprop = NULL; - } - if (!js_AddNativeProperty(cx, fun->object, (jsid)atom, - js_GetArgument, js_SetArgument, - SPROP_INVALID_SLOT, - JSPROP_ENUMERATE | JSPROP_PERMANENT | - JSPROP_SHARED, - SPROP_HAS_SHORTID | dupflag, - fun->nargs)) { - goto bad_formal; - } - fun->nargs++; - - /* - * Get the next token. Stop on end of stream. Otherwise - * insist on a comma, get another name, and iterate. - */ - tt = js_GetToken(cx, ts); - if (tt == TOK_EOF) - break; - if (tt != TOK_COMMA) - goto bad_formal; - tt = js_GetToken(cx, ts); - } - } - - /* Clean up. */ - ok = js_CloseTokenStream(cx, ts); - JS_ARENA_RELEASE(&cx->tempPool, mark); - if (!ok) - return JS_FALSE; - } - - if (argc) { - str = js_ValueToString(cx, argv[argc-1]); - } else { - /* Can't use cx->runtime->emptyString because we're called too early. */ - str = js_NewStringCopyZ(cx, js_empty_ucstr, 0); - } - if (!str) - return JS_FALSE; - if (argv) { - /* Use the last arg (or this if argc == 0) as a local GC root. */ - argv[(intN)(argc-1)] = STRING_TO_JSVAL(str); - } - - mark = JS_ARENA_MARK(&cx->tempPool); - ts = js_NewTokenStream(cx, JSSTRING_CHARS(str), JSSTRING_LENGTH(str), - filename, lineno, principals); - if (!ts) { - ok = JS_FALSE; - } else { - ok = js_CompileFunctionBody(cx, ts, fun) && - js_CloseTokenStream(cx, ts); - } - JS_ARENA_RELEASE(&cx->tempPool, mark); - return ok; - -bad_formal: - /* - * Report "malformed formal parameter" iff no illegal char or similar - * scanner error was already reported. - */ - if (!(ts->flags & TSF_ERROR)) - JS_ReportErrorNumber(cx, js_GetErrorMessage, NULL, JSMSG_BAD_FORMAL); - - /* - * Clean up the arguments string and tokenstream if we failed to parse - * the arguments. - */ - (void)js_CloseTokenStream(cx, ts); - JS_ARENA_RELEASE(&cx->tempPool, mark); - return JS_FALSE; -} - -JSObject * -js_InitFunctionClass(JSContext *cx, JSObject *obj) -{ - JSObject *proto; - JSAtom *atom; - JSFunction *fun; - - proto = JS_InitClass(cx, obj, NULL, &js_FunctionClass, Function, 1, - function_props, function_methods, NULL, NULL); - if (!proto) - return NULL; - atom = js_Atomize(cx, js_FunctionClass.name, strlen(js_FunctionClass.name), - 0); - if (!atom) - goto bad; - fun = js_NewFunction(cx, proto, NULL, 0, 0, obj, NULL); - if (!fun) - goto bad; - fun->script = js_NewScript(cx, 0, 0, 0); - if (!fun->script) - goto bad; - return proto; - -bad: - cx->newborn[GCX_OBJECT] = NULL; - return NULL; -} - -#if JS_HAS_CALL_OBJECT -JSObject * -js_InitCallClass(JSContext *cx, JSObject *obj) -{ - return JS_InitClass(cx, obj, NULL, &js_CallClass, NULL, 0, - call_props, NULL, NULL, NULL); -} -#endif - -JSFunction * -js_NewFunction(JSContext *cx, JSObject *funobj, JSNative native, uintN nargs, - uintN flags, JSObject *parent, JSAtom *atom) -{ - JSFunction *fun; - - /* Allocate a function struct. */ - fun = (JSFunction *) JS_malloc(cx, sizeof *fun); - if (!fun) - return NULL; - - /* If funobj is null, allocate an object for it. */ - if (funobj) { - OBJ_SET_PARENT(cx, funobj, parent); - } else { - funobj = js_NewObject(cx, &js_FunctionClass, NULL, parent); - if (!funobj) { - JS_free(cx, fun); - return NULL; - } - } - - /* Initialize all function members. */ - fun->nrefs = 0; - fun->object = NULL; - fun->native = native; - fun->script = NULL; - fun->nargs = nargs; - fun->extra = 0; - fun->nvars = 0; - fun->flags = flags & JSFUN_FLAGS_MASK; - fun->spare = 0; - fun->atom = atom; - fun->clasp = NULL; - - /* Link fun to funobj and vice versa. */ - if (!js_LinkFunctionObject(cx, fun, funobj)) { - cx->newborn[GCX_OBJECT] = NULL; - JS_free(cx, fun); - return NULL; - } - return fun; -} - -JSObject * -js_CloneFunctionObject(JSContext *cx, JSObject *funobj, JSObject *parent) -{ - JSObject *newfunobj; - JSFunction *fun; - - JS_ASSERT(OBJ_GET_CLASS(cx, funobj) == &js_FunctionClass); - newfunobj = js_NewObject(cx, &js_FunctionClass, funobj, parent); - if (!newfunobj) - return NULL; - fun = (JSFunction *) JS_GetPrivate(cx, funobj); - if (!js_LinkFunctionObject(cx, fun, newfunobj)) { - cx->newborn[GCX_OBJECT] = NULL; - return NULL; - } - return newfunobj; -} - -JSBool -js_LinkFunctionObject(JSContext *cx, JSFunction *fun, JSObject *funobj) -{ - if (!fun->object) - fun->object = funobj; - if (!JS_SetPrivate(cx, funobj, fun)) - return JS_FALSE; - JS_ATOMIC_INCREMENT(&fun->nrefs); - return JS_TRUE; -} - -JSFunction * -js_DefineFunction(JSContext *cx, JSObject *obj, JSAtom *atom, JSNative native, - uintN nargs, uintN attrs) -{ - JSFunction *fun; - - fun = js_NewFunction(cx, NULL, native, nargs, attrs, obj, atom); - if (!fun) - return NULL; - if (!OBJ_DEFINE_PROPERTY(cx, obj, (jsid)atom, OBJECT_TO_JSVAL(fun->object), - NULL, NULL, attrs & ~JSFUN_FLAGS_MASK, NULL)) { - return NULL; - } - return fun; -} - -#if (JSV2F_CONSTRUCT & JSV2F_SEARCH_STACK) -# error "JSINVOKE_CONSTRUCT and JSV2F_SEARCH_STACK are not disjoint!" -#endif - -JSFunction * -js_ValueToFunction(JSContext *cx, jsval *vp, uintN flags) -{ - jsval v; - JSObject *obj; - - v = *vp; - obj = NULL; - if (JSVAL_IS_OBJECT(v)) { - obj = JSVAL_TO_OBJECT(v); - if (obj && OBJ_GET_CLASS(cx, obj) != &js_FunctionClass) { - if (!OBJ_DEFAULT_VALUE(cx, obj, JSTYPE_FUNCTION, &v)) - return NULL; - obj = JSVAL_IS_FUNCTION(cx, v) ? JSVAL_TO_OBJECT(v) : NULL; - } - } - if (!obj) { - js_ReportIsNotFunction(cx, vp, flags); - return NULL; - } - return (JSFunction *) JS_GetPrivate(cx, obj); -} - -void -js_ReportIsNotFunction(JSContext *cx, jsval *vp, uintN flags) -{ - JSType type; - JSString *fallback; - JSString *str; - - /* - * We provide the typename as the fallback to handle the case when - * valueOf is not a function, which prevents ValueToString from being - * called as the default case inside js_DecompileValueGenerator (and - * so recursing back to here). - */ - type = JS_TypeOfValue(cx, *vp); - fallback = ATOM_TO_STRING(cx->runtime->atomState.typeAtoms[type]); - str = js_DecompileValueGenerator(cx, - (flags & JSV2F_SEARCH_STACK) - ? JSDVG_SEARCH_STACK - : cx->fp - ? vp - cx->fp->sp - : JSDVG_IGNORE_STACK, - *vp, - fallback); - if (str) { - JS_ReportErrorNumber(cx, js_GetErrorMessage, NULL, - (uintN)((flags & JSV2F_CONSTRUCT) - ? JSMSG_NOT_CONSTRUCTOR - : JSMSG_NOT_FUNCTION), - JS_GetStringBytes(str)); - } -} |
