--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/src/3rdparty/webkit/JavaScriptCore/runtime/JSGlobalObjectFunctions.cpp Mon Jan 11 14:00:40 2010 +0000
@@ -0,0 +1,439 @@
+/*
+ * Copyright (C) 1999-2002 Harri Porten (porten@kde.org)
+ * Copyright (C) 2001 Peter Kelly (pmk@post.com)
+ * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009 Apple Inc. All rights reserved.
+ * Copyright (C) 2007 Cameron Zwarich (cwzwarich@uwaterloo.ca)
+ * Copyright (C) 2007 Maks Orlovich
+ *
+ * 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 "config.h"
+#include "JSGlobalObjectFunctions.h"
+
+#include "CallFrame.h"
+#include "GlobalEvalFunction.h"
+#include "JSGlobalObject.h"
+#include "LiteralParser.h"
+#include "JSString.h"
+#include "Interpreter.h"
+#include "Parser.h"
+#include "dtoa.h"
+#include "Lexer.h"
+#include "Nodes.h"
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <wtf/ASCIICType.h>
+#include <wtf/Assertions.h>
+#include <wtf/MathExtras.h>
+#include <wtf/unicode/UTF8.h>
+
+using namespace WTF;
+using namespace Unicode;
+
+namespace JSC {
+
+static JSValue encode(ExecState* exec, const ArgList& args, const char* doNotEscape)
+{
+ UString str = args.at(0).toString(exec);
+ CString cstr = str.UTF8String(true);
+ if (!cstr.c_str())
+ return throwError(exec, URIError, "String contained an illegal UTF-16 sequence.");
+
+ UString result = "";
+ const char* p = cstr.c_str();
+ for (size_t k = 0; k < cstr.size(); k++, p++) {
+ char c = *p;
+ if (c && strchr(doNotEscape, c))
+ result.append(c);
+ else {
+ char tmp[4];
+ sprintf(tmp, "%%%02X", static_cast<unsigned char>(c));
+ result += tmp;
+ }
+ }
+ return jsString(exec, result);
+}
+
+static JSValue decode(ExecState* exec, const ArgList& args, const char* doNotUnescape, bool strict)
+{
+ UString result = "";
+ UString str = args.at(0).toString(exec);
+ int k = 0;
+ int len = str.size();
+ const UChar* d = str.data();
+ UChar u = 0;
+ while (k < len) {
+ const UChar* p = d + k;
+ UChar c = *p;
+ if (c == '%') {
+ int charLen = 0;
+ if (k <= len - 3 && isASCIIHexDigit(p[1]) && isASCIIHexDigit(p[2])) {
+ const char b0 = Lexer::convertHex(p[1], p[2]);
+ const int sequenceLen = UTF8SequenceLength(b0);
+ if (sequenceLen != 0 && k <= len - sequenceLen * 3) {
+ charLen = sequenceLen * 3;
+ char sequence[5];
+ sequence[0] = b0;
+ for (int i = 1; i < sequenceLen; ++i) {
+ const UChar* q = p + i * 3;
+ if (q[0] == '%' && isASCIIHexDigit(q[1]) && isASCIIHexDigit(q[2]))
+ sequence[i] = Lexer::convertHex(q[1], q[2]);
+ else {
+ charLen = 0;
+ break;
+ }
+ }
+ if (charLen != 0) {
+ sequence[sequenceLen] = 0;
+ const int character = decodeUTF8Sequence(sequence);
+ if (character < 0 || character >= 0x110000)
+ charLen = 0;
+ else if (character >= 0x10000) {
+ // Convert to surrogate pair.
+ result.append(static_cast<UChar>(0xD800 | ((character - 0x10000) >> 10)));
+ u = static_cast<UChar>(0xDC00 | ((character - 0x10000) & 0x3FF));
+ } else
+ u = static_cast<UChar>(character);
+ }
+ }
+ }
+ if (charLen == 0) {
+ if (strict)
+ return throwError(exec, URIError);
+ // The only case where we don't use "strict" mode is the "unescape" function.
+ // For that, it's good to support the wonky "%u" syntax for compatibility with WinIE.
+ if (k <= len - 6 && p[1] == 'u'
+ && isASCIIHexDigit(p[2]) && isASCIIHexDigit(p[3])
+ && isASCIIHexDigit(p[4]) && isASCIIHexDigit(p[5])) {
+ charLen = 6;
+ u = Lexer::convertUnicode(p[2], p[3], p[4], p[5]);
+ }
+ }
+ if (charLen && (u == 0 || u >= 128 || !strchr(doNotUnescape, u))) {
+ c = u;
+ k += charLen - 1;
+ }
+ }
+ k++;
+ result.append(c);
+ }
+ return jsString(exec, result);
+}
+
+bool isStrWhiteSpace(UChar c)
+{
+ switch (c) {
+ case 0x0009:
+ case 0x000A:
+ case 0x000B:
+ case 0x000C:
+ case 0x000D:
+ case 0x0020:
+ case 0x00A0:
+ case 0x2028:
+ case 0x2029:
+ return true;
+ default:
+ return c > 0xff && isSeparatorSpace(c);
+ }
+}
+
+static int parseDigit(unsigned short c, int radix)
+{
+ int digit = -1;
+
+ if (c >= '0' && c <= '9')
+ digit = c - '0';
+ else if (c >= 'A' && c <= 'Z')
+ digit = c - 'A' + 10;
+ else if (c >= 'a' && c <= 'z')
+ digit = c - 'a' + 10;
+
+ if (digit >= radix)
+ return -1;
+ return digit;
+}
+
+double parseIntOverflow(const char* s, int length, int radix)
+{
+ double number = 0.0;
+ double radixMultiplier = 1.0;
+
+ for (const char* p = s + length - 1; p >= s; p--) {
+ if (radixMultiplier == Inf) {
+ if (*p != '0') {
+ number = Inf;
+ break;
+ }
+ } else {
+ int digit = parseDigit(*p, radix);
+ number += digit * radixMultiplier;
+ }
+
+ radixMultiplier *= radix;
+ }
+
+ return number;
+}
+
+static double parseInt(const UString& s, int radix)
+{
+ int length = s.size();
+ const UChar* data = s.data();
+ int p = 0;
+
+ while (p < length && isStrWhiteSpace(data[p]))
+ ++p;
+
+ double sign = 1;
+ if (p < length) {
+ if (data[p] == '+')
+ ++p;
+ else if (data[p] == '-') {
+ sign = -1;
+ ++p;
+ }
+ }
+
+ if ((radix == 0 || radix == 16) && length - p >= 2 && data[p] == '0' && (data[p + 1] == 'x' || data[p + 1] == 'X')) {
+ radix = 16;
+ p += 2;
+ } else if (radix == 0) {
+ if (p < length && data[p] == '0')
+ radix = 8;
+ else
+ radix = 10;
+ }
+
+ if (radix < 2 || radix > 36)
+ return NaN;
+
+ int firstDigitPosition = p;
+ bool sawDigit = false;
+ double number = 0;
+ while (p < length) {
+ int digit = parseDigit(data[p], radix);
+ if (digit == -1)
+ break;
+ sawDigit = true;
+ number *= radix;
+ number += digit;
+ ++p;
+ }
+
+ if (number >= mantissaOverflowLowerBound) {
+ if (radix == 10)
+ number = WTF::strtod(s.substr(firstDigitPosition, p - firstDigitPosition).ascii(), 0);
+ else if (radix == 2 || radix == 4 || radix == 8 || radix == 16 || radix == 32)
+ number = parseIntOverflow(s.substr(firstDigitPosition, p - firstDigitPosition).ascii(), p - firstDigitPosition, radix);
+ }
+
+ if (!sawDigit)
+ return NaN;
+
+ return sign * number;
+}
+
+static double parseFloat(const UString& s)
+{
+ // Check for 0x prefix here, because toDouble allows it, but we must treat it as 0.
+ // Need to skip any whitespace and then one + or - sign.
+ int length = s.size();
+ const UChar* data = s.data();
+ int p = 0;
+ while (p < length && isStrWhiteSpace(data[p]))
+ ++p;
+
+ if (p < length && (data[p] == '+' || data[p] == '-'))
+ ++p;
+
+ if (length - p >= 2 && data[p] == '0' && (data[p + 1] == 'x' || data[p + 1] == 'X'))
+ return 0;
+
+ return s.toDouble(true /*tolerant*/, false /* NaN for empty string */);
+}
+
+JSValue JSC_HOST_CALL globalFuncEval(ExecState* exec, JSObject* function, JSValue thisValue, const ArgList& args)
+{
+ JSObject* thisObject = thisValue.toThisObject(exec);
+ JSObject* unwrappedObject = thisObject->unwrappedObject();
+ if (!unwrappedObject->isGlobalObject() || static_cast<JSGlobalObject*>(unwrappedObject)->evalFunction() != function)
+ return throwError(exec, EvalError, "The \"this\" value passed to eval must be the global object from which eval originated");
+
+ JSValue x = args.at(0);
+ if (!x.isString())
+ return x;
+
+ UString s = x.toString(exec);
+
+ LiteralParser preparser(exec, s, LiteralParser::NonStrictJSON);
+ if (JSValue parsedObject = preparser.tryLiteralParse())
+ return parsedObject;
+
+ RefPtr<EvalExecutable> eval = EvalExecutable::create(exec, makeSource(s));
+ JSObject* error = eval->compile(exec, static_cast<JSGlobalObject*>(unwrappedObject)->globalScopeChain().node());
+ if (error)
+ return throwError(exec, error);
+
+ return exec->interpreter()->execute(eval.get(), exec, thisObject, static_cast<JSGlobalObject*>(unwrappedObject)->globalScopeChain().node(), exec->exceptionSlot());
+}
+
+JSValue JSC_HOST_CALL globalFuncParseInt(ExecState* exec, JSObject*, JSValue, const ArgList& args)
+{
+ JSValue value = args.at(0);
+ int32_t radix = args.at(1).toInt32(exec);
+
+ if (radix != 0 && radix != 10)
+ return jsNumber(exec, parseInt(value.toString(exec), radix));
+
+ if (value.isInt32())
+ return value;
+
+ if (value.isDouble()) {
+ double d = value.asDouble();
+ if (isfinite(d))
+ return jsNumber(exec, (d > 0) ? floor(d) : ceil(d));
+ if (isnan(d) || isinf(d))
+ return jsNaN(exec);
+ return jsNumber(exec, 0);
+ }
+
+ return jsNumber(exec, parseInt(value.toString(exec), radix));
+}
+
+JSValue JSC_HOST_CALL globalFuncParseFloat(ExecState* exec, JSObject*, JSValue, const ArgList& args)
+{
+ return jsNumber(exec, parseFloat(args.at(0).toString(exec)));
+}
+
+JSValue JSC_HOST_CALL globalFuncIsNaN(ExecState* exec, JSObject*, JSValue, const ArgList& args)
+{
+ return jsBoolean(isnan(args.at(0).toNumber(exec)));
+}
+
+JSValue JSC_HOST_CALL globalFuncIsFinite(ExecState* exec, JSObject*, JSValue, const ArgList& args)
+{
+ double n = args.at(0).toNumber(exec);
+ return jsBoolean(!isnan(n) && !isinf(n));
+}
+
+JSValue JSC_HOST_CALL globalFuncDecodeURI(ExecState* exec, JSObject*, JSValue, const ArgList& args)
+{
+ static const char do_not_unescape_when_decoding_URI[] =
+ "#$&+,/:;=?@";
+
+ return decode(exec, args, do_not_unescape_when_decoding_URI, true);
+}
+
+JSValue JSC_HOST_CALL globalFuncDecodeURIComponent(ExecState* exec, JSObject*, JSValue, const ArgList& args)
+{
+ return decode(exec, args, "", true);
+}
+
+JSValue JSC_HOST_CALL globalFuncEncodeURI(ExecState* exec, JSObject*, JSValue, const ArgList& args)
+{
+ static const char do_not_escape_when_encoding_URI[] =
+ "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
+ "abcdefghijklmnopqrstuvwxyz"
+ "0123456789"
+ "!#$&'()*+,-./:;=?@_~";
+
+ return encode(exec, args, do_not_escape_when_encoding_URI);
+}
+
+JSValue JSC_HOST_CALL globalFuncEncodeURIComponent(ExecState* exec, JSObject*, JSValue, const ArgList& args)
+{
+ static const char do_not_escape_when_encoding_URI_component[] =
+ "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
+ "abcdefghijklmnopqrstuvwxyz"
+ "0123456789"
+ "!'()*-._~";
+
+ return encode(exec, args, do_not_escape_when_encoding_URI_component);
+}
+
+JSValue JSC_HOST_CALL globalFuncEscape(ExecState* exec, JSObject*, JSValue, const ArgList& args)
+{
+ static const char do_not_escape[] =
+ "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
+ "abcdefghijklmnopqrstuvwxyz"
+ "0123456789"
+ "*+-./@_";
+
+ UString result = "";
+ UString s;
+ UString str = args.at(0).toString(exec);
+ const UChar* c = str.data();
+ for (int k = 0; k < str.size(); k++, c++) {
+ int u = c[0];
+ if (u > 255) {
+ char tmp[7];
+ sprintf(tmp, "%%u%04X", u);
+ s = UString(tmp);
+ } else if (u != 0 && strchr(do_not_escape, static_cast<char>(u)))
+ s = UString(c, 1);
+ else {
+ char tmp[4];
+ sprintf(tmp, "%%%02X", u);
+ s = UString(tmp);
+ }
+ result += s;
+ }
+
+ return jsString(exec, result);
+}
+
+JSValue JSC_HOST_CALL globalFuncUnescape(ExecState* exec, JSObject*, JSValue, const ArgList& args)
+{
+ UString result = "";
+ UString str = args.at(0).toString(exec);
+ int k = 0;
+ int len = str.size();
+ while (k < len) {
+ const UChar* c = str.data() + k;
+ UChar u;
+ if (c[0] == '%' && k <= len - 6 && c[1] == 'u') {
+ if (isASCIIHexDigit(c[2]) && isASCIIHexDigit(c[3]) && isASCIIHexDigit(c[4]) && isASCIIHexDigit(c[5])) {
+ u = Lexer::convertUnicode(c[2], c[3], c[4], c[5]);
+ c = &u;
+ k += 5;
+ }
+ } else if (c[0] == '%' && k <= len - 3 && isASCIIHexDigit(c[1]) && isASCIIHexDigit(c[2])) {
+ u = UChar(Lexer::convertHex(c[1], c[2]));
+ c = &u;
+ k += 2;
+ }
+ k++;
+ result.append(*c);
+ }
+
+ return jsString(exec, result);
+}
+
+#ifndef NDEBUG
+JSValue JSC_HOST_CALL globalFuncJSCPrint(ExecState* exec, JSObject*, JSValue, const ArgList& args)
+{
+ CStringBuffer string;
+ args.at(0).toString(exec).getCString(string);
+ puts(string.data());
+ return jsUndefined();
+}
+#endif
+
+} // namespace JSC