function.cpp
// -*- c-basic-offset: 2 -*-
/*
* This file is part of the KDE libraries
* Copyright (C) 1999-2002 Harri Porten (porten@kde.org)
* Copyright (C) 2001,2003 Peter Kelly (pmk@post.com)
* Copyright (C) 2003 Apple Computer, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*
*/
#include "function.h"
#include "internal.h"
#include "function_object.h"
#include "lexer.h"
#include "nodes.h"
#include "operations.h"
#include "debugger.h"
#include "context.h"
#include <stdio.h>
#include <errno.h>
#include <stdlib.h>
#include <assert.h>
#include <string.h>
#include <math.h>
#include <ctype.h>
using namespace KJS;
// ------------------------- URI handling functions ---------------------------
// ECMA 15.1.3
UString encodeURI(ExecState *exec, UString string, UString unescapedSet)
{
char hexdigits[] = "0123456789ABCDEF";
int encbufAlloc = 2;
UChar *encbuf = (UChar*)malloc(encbufAlloc*sizeof(UChar));
int encbufLen = 0;
for (int k = 0; k < string.size(); k++) {
UChar C = string[k];
if (unescapedSet.find(C) >= 0) {
if (encbufLen+1 >= encbufAlloc)
encbuf = (UChar*)realloc(encbuf,(encbufAlloc *= 2)*sizeof(UChar));
encbuf[encbufLen++] = C;
}
else {
unsigned char octets[4];
int octets_len = 0;
if (C.uc <= 0x007F) {
unsigned short zzzzzzz = C.uc;
octets[0] = zzzzzzz;
octets_len = 1;
}
else if (C.uc <= 0x07FF) {
unsigned short zzzzzz = C.uc & 0x3F;
unsigned short yyyyy = (C.uc >> 6) & 0x1F;
octets[0] = 0xC0 | yyyyy;
octets[1] = 0x80 | zzzzzz;
octets_len = 2;
}
else if (C.uc >= 0xD800 && C.uc <= 0xDBFF) {
// we need two chars
if (k + 1 >= string.size()) {
Object err = Error::create(exec,URIError);
exec->setException(err);
free(encbuf);
return UString("");
}
unsigned short Cnext = UChar(string[++k]).uc;
if (Cnext < 0xDC00 || Cnext > 0xDFFF) {
Object err = Error::create(exec,URIError);
exec->setException(err);
free(encbuf);
return UString("");
}
unsigned short zzzzzz = Cnext & 0x3F;
unsigned short yyyy = (Cnext >> 6) & 0x0F;
unsigned short xx = C.uc & 0x03;
unsigned short wwww = (C.uc >> 2) & 0x0F;
unsigned short vvvv = (C.uc >> 6) & 0x0F;
unsigned short uuuuu = vvvv+1;
octets[0] = 0xF0 | (uuuuu >> 2);
octets[1] = 0x80 | ((uuuuu & 0x03) << 4) | wwww;
octets[2] = 0x80 | (xx << 4) | yyyy;
octets[3] = 0x80 | zzzzzz;
octets_len = 4;
}
else if (C.uc >= 0xDC00 && C.uc <= 0xDFFF) {
Object err = Error::create(exec,URIError);
exec->setException(err);
free(encbuf);
return UString("");
}
else {
// 0x0800 - 0xD7FF or 0xE000 - 0xFFFF
unsigned short zzzzzz = C.uc & 0x3F;
unsigned short yyyyyy = (C.uc >> 6) & 0x3F;
unsigned short xxxx = (C.uc >> 12) & 0x0F;
octets[0] = 0xE0 | xxxx;
octets[1] = 0x80 | yyyyyy;
octets[2] = 0x80 | zzzzzz;
octets_len = 3;
}
while (encbufLen+3*octets_len >= encbufAlloc)
encbuf = (UChar*)realloc(encbuf,(encbufAlloc *= 2)*sizeof(UChar));
for (int j = 0; j < octets_len; j++) {
encbuf[encbufLen++] = '%';
encbuf[encbufLen++] = hexdigits[octets[j] >> 4];
encbuf[encbufLen++] = hexdigits[octets[j] & 0x0F];
}
}
}
UString encoded(encbuf,encbufLen);
free(encbuf);
return encoded;
}
static bool decodeHex(UChar hi, UChar lo, unsigned short *val)
{
*val = 0;
if (hi.uc >= '0' && hi.uc <= '9')
*val = (hi.uc-'0') << 4;
else if (hi.uc >= 'a' && hi.uc <= 'f')
*val = 10+(hi.uc-'a') << 4;
else if (hi.uc >= 'A' && hi.uc <= 'F')
*val = 10+(hi.uc-'A') << 4;
else
return false;
if (lo.uc >= '0' && lo.uc <= '9')
*val |= (lo.uc-'0');
else if (lo.uc >= 'a' && lo.uc <= 'f')
*val |= 10+(lo.uc-'a');
else if (lo.uc >= 'A' && lo.uc <= 'F')
*val |= 10+(lo.uc-'A');
else
return false;
return true;
}
UString decodeURI(ExecState *exec, UString string, UString reservedSet)
{
int decbufAlloc = 2;
UChar *decbuf = (UChar*)malloc(decbufAlloc*sizeof(UChar));
int decbufLen = 0;
for (int k = 0; k < string.size(); k++) {
UChar C = string[k];
if (C != UChar('%')) {
// Normal unescaped character
if (decbufLen+1 >= decbufAlloc)
decbuf = (UChar*)realloc(decbuf,(decbufAlloc *= 2)*sizeof(UChar));
decbuf[decbufLen++] = C;
continue;
}
// We have % escape sequence... expect at least 2 more characters
int start = k;
if (k+2 >= string.size()) {
Object err = Error::create(exec,URIError);
exec->setException(err);
free(decbuf);
return UString("");
}
unsigned short B;
if (!decodeHex(string[k+1],string[k+2],&B)) {
Object err = Error::create(exec,URIError);
exec->setException(err);
free(decbuf);
return UString("");
}
k += 2;
if (decbufLen+2 >= decbufAlloc)
decbuf = (UChar*)realloc(decbuf,(decbufAlloc *= 2)*sizeof(UChar));
if ((B & 0x80) == 0) {
// Single-byte character
C = B;
}
else {
// Multi-byte character
int n = 0;
while (((B << n) & 0x80) != 0)
n++;
if (n < 2 || n > 4) {
Object err = Error::create(exec,URIError);
exec->setException(err);
free(decbuf);
return UString("");
}
if (k+3*(n-1) >= string.size()) {
Object err = Error::create(exec,URIError);
exec->setException(err);
free(decbuf);
return UString("");
}
unsigned short octets[4];
octets[0] = B;
for (int j = 1; j < n; j++) {
k++;
if ((UChar(string[k]) != UChar('%')) ||
!decodeHex(string[k+1],string[k+2],&B) ||
((B & 0xC0) != 0x80)) {
Object err = Error::create(exec,URIError);
exec->setException(err);
free(decbuf);
return UString("");
}
k += 2;
octets[j] = B;
}
// UTF-8 transform
const unsigned long replacementChar = 0xFFFD;
unsigned long V;
if (n == 2) {
unsigned long yyyyy = octets[0] & 0x1F;
unsigned long zzzzzz = octets[1] & 0x3F;
V = (yyyyy << 6) | zzzzzz;
// 2-byte sequence overlong for this value?
if (V < 0x80)
V = replacementChar;
C = UChar((unsigned short)V);
}
else if (n == 3) {
unsigned long xxxx = octets[0] & 0x0F;
unsigned long yyyyyy = octets[1] & 0x3F;
unsigned long zzzzzz = octets[2] & 0x3F;
V = (xxxx << 12) | (yyyyyy << 6) | zzzzzz;
// 3-byte sequence overlong for this value,
// an invalid value or UTF-16 surrogate?
if (V < 0x800 || V == 0xFFFE || V == 0xFFFF ||
(V >= 0xD800 && V <= 0xDFFF))
V = replacementChar;
C = UChar((unsigned short)V);
}
else {
assert(n == 4);
unsigned long uuuuu = ((octets[0] & 0x07) << 2) | ((octets[1] >> 4) & 0x03);
unsigned long vvvv = uuuuu-1;
if (vvvv > 0x0F) {
Object err = Error::create(exec,URIError);
exec->setException(err);
free(decbuf);
return UString("");
}
unsigned long wwww = octets[1] & 0x0F;
unsigned long xx = (octets[2] >> 4) & 0x03;
unsigned long yyyy = octets[2] & 0x0F;
unsigned long zzzzzz = octets[3] & 0x3F;
unsigned short H = 0xD800 | (vvvv << 6) | (wwww << 2) | xx;
unsigned short L = 0xDC00 | (yyyy << 6) | zzzzzz;
decbuf[decbufLen++] = UChar(H);
decbuf[decbufLen++] = UChar(L);
continue;
}
}
if (reservedSet.find(C) < 0) {
decbuf[decbufLen++] = C;
}
else {
// copy unencoded sequence
while (decbufLen+k-start+1 >= decbufAlloc)
decbuf = (UChar*)realloc(decbuf,(decbufAlloc *= 2)*sizeof(UChar));
for (int p = start; p <= k; p++)
decbuf[decbufLen++] = string[p];
}
}
UString decoded(decbuf,decbufLen);
free(decbuf);
return decoded;
}
static UString uriReserved = ";/?:@&=+$,";
static UString uriAlpha = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ";
static UString DecimalDigit = "0123456789";
static UString uriMark = "-_.!~*'()";
static UString uriUnescaped = uriAlpha+DecimalDigit+uriMark;
// ----------------------------- FunctionImp ----------------------------------
const ClassInfo FunctionImp::info = {"Function", &InternalFunctionImp::info, 0, 0};
namespace KJS {
class Parameter {
public:
Parameter(const Identifier &n) : name(n), next(0L) { }
~Parameter() { delete next; }
Identifier name;
Parameter *next;
};
}
FunctionImp::FunctionImp(ExecState *exec, const Identifier &n)
: InternalFunctionImp(
static_cast<FunctionPrototypeImp*>(exec->lexicalInterpreter()->builtinFunctionPrototype().imp())
), param(0L), line0(-1), line1(-1), sid(-1)
{
//fprintf(stderr,"FunctionImp::FunctionImp this=%p\n");
ident = n;
}
FunctionImp::~FunctionImp()
{
delete param;
}
bool FunctionImp::implementsCall() const
{
return true;
}
Value FunctionImp::call(ExecState *exec, Object &thisObj, const List &args)
{
Object &globalObj = exec->dynamicInterpreter()->globalObject();
// enter a new execution context
ContextImp ctx(globalObj, exec->dynamicInterpreter()->imp(), thisObj, sid, codeType(),
exec->context().imp(), this, &args);
ExecState newExec(exec->dynamicInterpreter(), &ctx);
newExec.setException(exec->exception()); // could be null
// assign user supplied arguments to parameters
processParameters(&newExec, args);
// add variable declarations (initialized to undefined)
processVarDecls(&newExec);
ctx.setLines(line0,line0);
Debugger *dbg = exec->interpreter()->imp()->debugger();
if (dbg) {
if (!dbg->enterContext(&newExec)) {
// debugger requested we stop execution
dbg->imp()->abort();
return Undefined();
}
}
Completion comp = execute(&newExec);
ctx.setLines(line1,line1);
if (dbg) {
Object func(this);
// ### lineno is inaccurate - we really want the end of the function _body_ here
// line1 is suppoed to be the end of the function start, just before the body
if (!dbg->exitContext(&newExec,comp)) {
// debugger requested we stop execution
dbg->imp()->abort();
return Undefined();
}
}
// if an exception occurred, propogate it back to the previous execution object
if (newExec.hadException())
exec->setException(newExec.exception());
#ifdef KJS_VERBOSE
CString n = ident.isEmpty() ? CString("(internal)") : ident.ustring().cstring();
if (comp.complType() == Throw) {
n += " throws";
printInfo(exec, n.c_str(), comp.value());
} else if (comp.complType() == ReturnValue) {
n += " returns";
printInfo(exec, n.c_str(), comp.value());
} else
fprintf(stderr, "%s returns: undefined\n", n.c_str());
#endif
if (comp.complType() == Throw) {
exec->setException(comp.value());
return comp.value();
}
else if (comp.complType() == ReturnValue)
return comp.value();
else
return Undefined();
}
void FunctionImp::addParameter(const Identifier &n)
{
Parameter **p = &param;
while (*p)
p = &(*p)->next;
*p = new Parameter(n);
}
Identifier FunctionImp::parameterProperty(int index) const
{
// Find the property name corresponding to the given parameter
int pos = 0;
Parameter *p;
for (p = param; p && pos < index; p = p->next)
pos++;
if (!p)
return Identifier::null();
// Are there any subsequent parameters with the same name?
Identifier name = p->name;
for (p = p->next; p; p = p->next)
if (p->name == name)
return Identifier::null();
return name;
}
UString FunctionImp::parameterString() const
{
UString s;
const Parameter *p = param;
while (p) {
if (!s.isEmpty())
s += ", ";
s += p->name.ustring();
p = p->next;
}
return s;
}
// ECMA 10.1.3q
void FunctionImp::processParameters(ExecState *exec, const List &args)
{
Object variable = exec->context().imp()->variableObject();
#ifdef KJS_VERBOSE
fprintf(stderr, "---------------------------------------------------\n"
"processing parameters for %s call\n",
name().isEmpty() ? "(internal)" : name().ascii());
#endif
if (param) {
ListIterator it = args.begin();
Parameter *p = param;
while (p) {
if (it != args.end()) {
#ifdef KJS_VERBOSE
fprintf(stderr, "setting parameter %s ", p->name.ascii());
printInfo(exec,"to", *it);
#endif
variable.put(exec, p->name, *it);
it++;
} else
variable.put(exec, p->name, Undefined());
p = p->next;
}
}
#ifdef KJS_VERBOSE
else {
for (int i = 0; i < args.size(); i++)
printInfo(exec,"setting argument", args[i]);
}
#endif
}
void FunctionImp::processVarDecls(ExecState * /*exec*/)
{
}
Value FunctionImp::get(ExecState *exec, const Identifier &propertyName) const
{
// Find the arguments from the closest context.
if (propertyName == argumentsPropertyName) {
// delme
ContextImp *context = exec->context().imp();
// fixme
// ContextImp *context = exec->_context;
while (context) {
if (context->function() == this)
return static_cast<ActivationImp *>
(context->activationObject())->get(exec, propertyName);
context = context->callingContext();
}
return Null();
}
// Compute length of parameters.
if (propertyName == lengthPropertyName) {
const Parameter * p = param;
int count = 0;
while (p) {
++count;
p = p->next;
}
return Number(count);
}
if (propertyName == callerPropertyName) {
ContextImp *context = exec->context().imp();
while (context) {
if (context->function() == this) {
ContextImp *cc = context->callingContext();
if (cc && cc->function())
return Value(cc->function());
else
return Null();
}
context = context->callingContext();
}
return Null();
}
return InternalFunctionImp::get(exec, propertyName);
}
void FunctionImp::put(ExecState *exec, const Identifier &propertyName, const Value &value, int attr)
{
if (propertyName == argumentsPropertyName || propertyName == lengthPropertyName)
return;
InternalFunctionImp::put(exec, propertyName, value, attr);
}
bool FunctionImp::hasProperty(ExecState *exec, const Identifier &propertyName) const
{
if (propertyName == argumentsPropertyName || propertyName == lengthPropertyName)
return true;
return InternalFunctionImp::hasProperty(exec, propertyName);
}
bool FunctionImp::deleteProperty(ExecState *exec, const Identifier &propertyName)
{
if (propertyName == argumentsPropertyName || propertyName == lengthPropertyName)
return false;
return InternalFunctionImp::deleteProperty(exec, propertyName);
}
// ------------------------------ DeclaredFunctionImp --------------------------
// ### is "Function" correct here?
const ClassInfo DeclaredFunctionImp::info = {"Function", &FunctionImp::info, 0, 0};
DeclaredFunctionImp::DeclaredFunctionImp(ExecState *exec, const Identifier &n,
FunctionBodyNode *b, const ScopeChain &sc)
: FunctionImp(exec,n), body(b)
{
Value protect(this);
body->ref();
setScope(sc);
line0 = body->firstLine();
line1 = body->lastLine();
sid = body->sourceId();
}
DeclaredFunctionImp::~DeclaredFunctionImp()
{
if ( body->deref() )
delete body;
}
bool DeclaredFunctionImp::implementsConstruct() const
{
return true;
}
// ECMA 13.2.2 [[Construct]]
Object DeclaredFunctionImp::construct(ExecState *exec, const List &args)
{
Object proto;
Value p = get(exec,prototypePropertyName);
if (p.type() == ObjectType)
proto = Object(static_cast<ObjectImp*>(p.imp()));
else
proto = exec->lexicalInterpreter()->builtinObjectPrototype();
Object obj(new ObjectImp(proto));
Value res = call(exec,obj,args);
if (res.type() == ObjectType)
return Object::dynamicCast(res);
else
return obj;
}
Completion DeclaredFunctionImp::execute(ExecState *exec)
{
Completion result = body->execute(exec);
if (result.complType() == Throw || result.complType() == ReturnValue)
return result;
return Completion(Normal, Undefined()); // TODO: or ReturnValue ?
}
void DeclaredFunctionImp::processVarDecls(ExecState *exec)
{
body->processVarDecls(exec);
}
// ------------------------------- ShadowImp -----------------------------------
namespace KJS {
// Acts as a placeholder value to indicate that the actual value is kept
// in the activation object
class ShadowImp : public ObjectImp {
public:
ShadowImp(ObjectImp *_obj, Identifier _prop) : obj(_obj), prop(_prop) {}
virtual void mark();
virtual const ClassInfo *classInfo() const { return &info; }
static const ClassInfo info;
ObjectImp *obj;
Identifier prop;
};
/*KDE_NOEXPORT*/ const ClassInfo ShadowImp::info = {"Shadow", 0, 0, 0};
void ShadowImp::mark()
{
ObjectImp::mark();
if (!obj->marked())
obj->mark();
}
}
// ------------------------------ ArgumentsImp ---------------------------------
const ClassInfo ArgumentsImp::info = {"Arguments", 0, 0, 0};
// ECMA 10.1.8
ArgumentsImp::ArgumentsImp(ExecState *exec, FunctionImp *func, const List &args,
ActivationImp *act)
: ObjectImp(exec->lexicalInterpreter()->builtinObjectPrototype()), activation(act)
{
Value protect(this);
putDirect(calleePropertyName, func, DontEnum);
putDirect(lengthPropertyName, args.size(), DontEnum);
if (!args.isEmpty()) {
ListIterator arg = args.begin();
for (int i = 0; arg != args.end(); arg++, i++) {
Identifier prop = func->parameterProperty(i);
if (!prop.isEmpty()) {
Object shadow(new ShadowImp(act,prop));
ObjectImp::put(exec,Identifier::from(i), shadow, DontEnum);
}
else {
ObjectImp::put(exec,Identifier::from(i), *arg, DontEnum);
}
}
}
}
void ArgumentsImp::mark()
{
ObjectImp::mark();
if (!activation->marked())
activation->mark();
}
Value ArgumentsImp::get(ExecState *exec, const Identifier &propertyName) const
{
Value val = ObjectImp::get(exec,propertyName);
assert(SimpleNumber::is(val.imp()) || !val.imp()->isDestroyed());
Object obj = Object::dynamicCast(val);
if (obj.isValid() && obj.inherits(&ShadowImp::info)) {
ShadowImp *shadow = static_cast<ShadowImp*>(val.imp());
return activation->get(exec,shadow->prop);
}
else {
return val;
}
}
void ArgumentsImp::put(ExecState *exec, const Identifier &propertyName,
const Value &value, int attr)
{
Value val = ObjectImp::get(exec,propertyName);
Object obj = Object::dynamicCast(val);
if (obj.isValid() && obj.inherits(&ShadowImp::info)) {
ShadowImp *shadow = static_cast<ShadowImp*>(val.imp());
activation->put(exec,shadow->prop,value,attr);
}
else {
ObjectImp::put(exec,propertyName,value,attr);
}
}
// ------------------------------ ActivationImp --------------------------------
const ClassInfo ActivationImp::info = {"Activation", 0, 0, 0};
// ECMA 10.1.6
ActivationImp::ActivationImp(FunctionImp *function, const List &arguments)
: _function(function), _arguments(true), _argumentsObject(0)
{
_arguments = arguments.copy();
// FIXME: Do we need to support enumerating the arguments property?
}
Value ActivationImp::get(ExecState *exec, const Identifier &propertyName) const
{
if (propertyName == argumentsPropertyName) {
// check for locally declared arguments property
ValueImp *v = getDirect(propertyName);
if (v)
return Value(v);
// default: return builtin arguments array
if (!_argumentsObject)
_argumentsObject = new ArgumentsImp(exec, _function, _arguments, const_cast<ActivationImp*>(this));
return Value(_argumentsObject);
}
return ObjectImp::get(exec, propertyName);
}
bool ActivationImp::hasProperty(ExecState *exec, const Identifier &propertyName) const
{
if (propertyName == argumentsPropertyName)
return true;
return ObjectImp::hasProperty(exec, propertyName);
}
bool ActivationImp::deleteProperty(ExecState *exec, const Identifier &propertyName)
{
if (propertyName == argumentsPropertyName)
return false;
return ObjectImp::deleteProperty(exec, propertyName);
}
void ActivationImp::mark()
{
ObjectImp::mark();
if (_function && !_function->marked())
_function->mark();
_arguments.mark();
if (_argumentsObject && !_argumentsObject->marked())
_argumentsObject->mark();
}
// ------------------------------ GlobalFunc -----------------------------------
GlobalFuncImp::GlobalFuncImp(ExecState * /*exec*/, FunctionPrototypeImp *funcProto,
int i, int len, const Identifier &_ident)
: InternalFunctionImp(funcProto), id(i)
{
Value protect(this);
putDirect(lengthPropertyName, len, DontDelete|ReadOnly|DontEnum);
ident = _ident;
}
CodeType GlobalFuncImp::codeType() const
{
return id == Eval ? EvalCode : codeType();
}
bool GlobalFuncImp::implementsCall() const
{
return true;
}
Value GlobalFuncImp::call(ExecState *exec, Object &thisObj, const List &args)
{
Value res;
static const char do_not_escape[] =
"ABCDEFGHIJKLMNOPQRSTUVWXYZ"
"abcdefghijklmnopqrstuvwxyz"
"0123456789"
"*+-./@_";
switch (id) {
case Eval: { // eval()
Value x = args[0];
if (x.type() != StringType)
return x;
else {
UString s = x.toString(exec);
int errLine;
UString errMsg;
#ifdef KJS_VERBOSE
fprintf(stderr, "eval(): %s\n", s.ascii());
#endif
SourceCode *source;
FunctionBodyNode *progNode = Parser::parse(s.data(),s.size(),&source,&errLine,&errMsg);
// notify debugger that source has been parsed
Debugger *dbg = exec->interpreter()->imp()->debugger();
if (dbg) {
bool cont = dbg->sourceParsed(exec,source->sid,s,errLine);
if (!cont) {
source->deref();
dbg->imp()->abort();
if (progNode)
delete progNode;
return Undefined();
}
}
exec->interpreter()->imp()->addSourceCode(source);
// no program node means a syntax occurred
if (!progNode) {
Object err = Error::create(exec,SyntaxError,errMsg.ascii(),errLine);
err.put(exec,"sid",Number(source->sid));
exec->setException(err);
source->deref();
return err;
}
source->deref();
progNode->ref();
// enter a new execution context
ContextImp ctx(exec->dynamicInterpreter()->globalObject(),
exec->dynamicInterpreter()->imp(),
thisObj,
source->sid,
EvalCode,
exec->context().imp());
ExecState newExec(exec->dynamicInterpreter(), &ctx);
newExec.setException(exec->exception()); // could be null
ctx.setLines(progNode->firstLine(),progNode->firstLine());
if (dbg) {
if (!dbg->enterContext(&newExec)) {
// debugger requested we stop execution
dbg->imp()->abort();
if (progNode->deref())
delete progNode;
return Undefined();
}
}
// execute the code
progNode->processVarDecls(&newExec);
Completion c = progNode->execute(&newExec);
res = Undefined();
ctx.setLines(progNode->lastLine(),progNode->lastLine());
if (dbg && !dbg->exitContext(&newExec,c))
// debugger requested we stop execution
dbg->imp()->abort();
else if (newExec.hadException()) // propagate back to parent context
exec->setException(newExec.exception());
else if (c.complType() == Throw)
exec->setException(c.value());
else if (c.isValueCompletion())
res = c.value();
if (progNode->deref())
delete progNode;
return res;
}
break;
}
case ParseInt: { // ECMA 15.1.2.2
CString cstr = args[0].toString(exec).cstring();
const char* startptr = cstr.c_str();
while ( *startptr && isspace( *startptr ) ) // first, skip leading spaces
++startptr;
int base = 0;
if (args.size() > 1)
base = args[1].toInt32(exec);
double sign = 1;
if (*startptr == '-') {
sign = -1;
startptr++;
}
else if (*startptr == '+') {
sign = 1;
startptr++;
}
bool leading0 = false;
if ((base == 0 || base == 16) &&
(*startptr == '0' && (startptr[1] == 'x' || startptr[1] == 'X'))) {
startptr += 2;
base = 16;
}
else if (base == 0 && *startptr == '0') {
base = 8;
leading0 = true;
startptr++;
}
else if (base == 0) {
base = 10;
}
if (base < 2 || base > 36) {
res = Number(NaN);
}
else {
long double val = 0;
int index = 0;
for (; *startptr; startptr++) {
int thisval = -1;
if (*startptr >= '0' && *startptr <= '9')
thisval = *startptr - '0';
else if (*startptr >= 'a' && *startptr <= 'z')
thisval = 10 + *startptr - 'a';
else if (*startptr >= 'A' && *startptr <= 'Z')
thisval = 10 + *startptr - 'A';
if (thisval < 0 || thisval >= base)
break;
val *= base;
val += thisval;
index++;
}
if (index == 0 && !leading0)
res = Number(NaN);
else
res = Number(double(val)*sign);
}
break;
}
case ParseFloat: {
UString str = args[0].toString(exec);
// don't allow hex numbers here
bool isHex = false;
if (str.is8Bit()) {
const char *c = str.ascii();
while (isspace(*c))
c++;
isHex = (c[0] == '0' && (c[1] == 'x' || c[1] == 'X'));
}
if (isHex)
res = Number(0);
else
res = Number(str.toDouble( true /*tolerant*/, false ));
}
break;
case IsNaN:
res = Boolean(isNaN(args[0].toNumber(exec)));
break;
case IsFinite: {
double n = args[0].toNumber(exec);
res = Boolean(!isNaN(n) && !isInf(n));
break;
}
case DecodeURI:
res = String(decodeURI(exec,args[0].toString(exec),uriReserved+"#"));
break;
case DecodeURIComponent:
res = String(decodeURI(exec,args[0].toString(exec),""));
break;
case EncodeURI:
res = String(encodeURI(exec,args[0].toString(exec),uriReserved+uriUnescaped+"#"));
break;
case EncodeURIComponent:
res = String(encodeURI(exec,args[0].toString(exec),uriUnescaped));
break;
case Escape: {
UString r = "", s, str = args[0].toString(exec);
const UChar *c = str.data();
for (int k = 0; k < str.size(); k++, c++) {
int u = c->uc;
if (u > 255) {
char tmp[7];
sprintf(tmp, "%%u%04X", u);
s = UString(tmp);
} else if (u != 0 && strchr(do_not_escape, (char)u)) {
s = UString(c, 1);
} else {
char tmp[4];
sprintf(tmp, "%%%02X", u);
s = UString(tmp);
}
r += s;
}
res = String(r);
break;
}
case UnEscape: {
UString s = "", str = args[0].toString(exec);
int k = 0, len = str.size();
while (k < len) {
const UChar *c = str.data() + k;
UChar u;
if (*c == UChar('%') && k <= len - 6 && *(c+1) == UChar('u')) {
if (Lexer::isHexDigit((c+2)->uc) && Lexer::isHexDigit((c+3)->uc) &&
Lexer::isHexDigit((c+4)->uc) && Lexer::isHexDigit((c+5)->uc)) {
u = Lexer::convertUnicode((c+2)->uc, (c+3)->uc,
(c+4)->uc, (c+5)->uc);
c = &u;
k += 5;
}
} else if (*c == UChar('%') && k <= len - 3 &&
Lexer::isHexDigit((c+1)->uc) && Lexer::isHexDigit((c+2)->uc)) {
u = UChar(Lexer::convertHex((c+1)->uc, (c+2)->uc));
c = &u;
k += 2;
}
k++;
s += UString(c, 1);
}
res = String(s);
break;
}
case KJSPrint:
#ifndef NDEBUG
puts(args[0].toString(exec).ascii());
#endif
break;
}
return res;
}
KJS::Value
Value objects are act as wrappers ("smart pointers") around ValueImp objects and their descendents...
Definition: value.h:168
KStdAccel::next
const KShortcut & next()
KJS::Value::type
Type type() const
Returns the type of value.
Definition: value.h:196
KJS::UString::is8Bit
bool is8Bit() const
Use this if you want to make sure that this string is a plain ASCII string.
Definition: ustring.cpp:550
KJS::InternalFunctionImp
Base class for all function objects.
Definition: function.h:41
KJS::ExecState::dynamicInterpreter
Interpreter * dynamicInterpreter() const
Returns the interpreter associated with this execution state.
Definition: interpreter.h:453
KJS::ScopeChain
A scope chain object.
Definition: scope_chain.h:47
KJS::UString::size
int size() const
Definition: ustring.h:359
KJS::Number
Represents an primitive Number value.
Definition: value.h:368
KJS::Interpreter::globalObject
Object & globalObject() const
Returns the object that is used as the global object during all script execution performed by this in...
Definition: interpreter.cpp:129
KJS::UString::find
int find(const UString &f, int pos=0) const
Definition: ustring.cpp:799
KJS::Null
Represents an primitive Null value.
Definition: value.h:295
KJS::ExecState::lexicalInterpreter
Interpreter * lexicalInterpreter() const
Returns the interpreter associated with the current scope's global object.
Definition: interpreter.cpp:395
KJS::ContextImp
Execution context.
Definition: context.h:35
KJS::CString
8 bit char based string class
Definition: ustring.h:165
KJS::Error::create
static Object create(ExecState *exec, ErrorType errtype=GeneralError, const char *message=0, int lineno=-1, int sourceId=-1)
Factory method for error objects.
Definition: object.cpp:504
KJS::FunctionPrototypeImp
The initial value of Function.prototype (and thus all objects created with the Function constructor) ...
Definition: function_object.h:35
KJS::Identifier::isEmpty
bool isEmpty() const
Returns that the identifiers string is set, but is empty.
Definition: identifier.h:82
KJS::UString::toDouble
double toDouble(bool tolerateTrailingJunk, bool tolerateEmptyString) const
Attempts an conversion to a number.
Definition: ustring.cpp:608
KJS::Object
Represents an Object.
Definition: object.h:82
KJS::List::begin
ListIterator begin() const
Definition: list.h:186
KJS::Undefined
Represents an primitive Undefined value.
Definition: value.h:270
KJS::FunctionImp
Implementation class for functions implemented in JS.
Definition: internal.h:390
KJS::UString
Unicode string class.
Definition: ustring.h:189
KJS::UChar
Unicode character.
Definition: ustring.h:51
KJS::String
Represents an primitive String value.
Definition: value.h:341
KJS::Object::dynamicCast
static Object dynamicCast(const Value &v)
Converts a Value into an Object.
Definition: object.cpp:46
KJS::ValueImp
ValueImp is the base type for all primitives (Undefined, Null, Boolean, String, Number) and objects i...
Definition: value.h:79
KJS::ExecState::context
Context context() const
Returns the execution context associated with this execution state.
Definition: interpreter.h:471
KJS::List::size
int size() const
Definition: list.h:90
KJS::Completion
Completion objects are used to convey the return status and value from functions. ...
Definition: completion.h:49
KJS::Interpreter::builtinObjectPrototype
Object builtinObjectPrototype() const
Returns the builtin "Object.prototype" object.
Definition: interpreter.cpp:219
KJS::List::end
ListIterator end() const
Definition: list.h:187
KJS::Object::put
void put(ExecState *exec, const Identifier &propertyName, const Value &value, int attr=None)
Sets the specified property.
Definition: object.h:670
KJS::List
Native list type.
Definition: list.h:48
KJS::Boolean
Represents an primitive Boolean value.
Definition: value.h:317
KJS::Value::toString
UString toString(ExecState *exec) const
Performs the ToString type conversion operation on this value (ECMA 9.8)
Definition: value.h:247
KJS::ClassInfo
Class Information.
Definition: object.h:59
KJS::List::copy
List copy() const
Make a copy of the list.
Definition: list.cpp:281
KJS::List::isEmpty
bool isEmpty() const
Definition: list.h:86
KJS::Value::isValid
bool isValid() const
Returns whether or not this is a valid value.
Definition: value.h:182
KJS::UString::isEmpty
bool isEmpty() const
Definition: ustring.h:347
KJS::UString::ascii
char * ascii() const
Convert the Unicode string to plain ASCII chars chopping of any higher bytes.
Definition: ustring.cpp:486
KJS::Identifier::null
static const Identifier & null()
Creates an empty Identifier.
Definition: identifier.cpp:302
KJS::ExecState
Represents the current state of script execution.
Definition: interpreter.h:439
KStdAccel::name
QString name(StdAccel id)
KJS::Identifier
Represents an Identifier for a Javascript object.
Definition: identifier.h:32
KJS::UString::data
const UChar * data() const
Definition: ustring.h:339
KJS::ListIterator
Iterator for KJS::List objects.
Definition: list.h:138

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