/* -*- Mode: java; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- * * ***** BEGIN LICENSE BLOCK ***** * Version: MPL 1.1/GPL 2.0 * * 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 Rhino code, released * May 6, 1999. * * The Initial Developer of the Original Code is * Netscape Communications Corporation. * Portions created by the Initial Developer are Copyright (C) 1997-1999 * the Initial Developer. All Rights Reserved. * * Contributor(s): * Norris Boyd * Igor Bukanov * Mike McCabe * * Alternatively, the contents of this file may be used under the terms of * the GNU General Public License Version 2 or later (the "GPL"), in which * case the provisions of the GPL are applicable instead of those above. If * you wish to allow use of your version of this file only under the terms of * the GPL and not to allow others to use your version of this file under the * MPL, indicate your decision by deleting the provisions above and replacing * them with the notice and other provisions required by the GPL. If you do * not delete the provisions above, a recipient may use your version of this * file under either the MPL or the GPL. * * ***** END LICENSE BLOCK ***** */ package org.mozilla.javascript; import java.io.Serializable; import org.mozilla.javascript.xml.XMLLib; /** * This class implements the global native object (function and value * properties only). * * See ECMA 15.1.[12]. * * @author Mike Shaver */ public class NativeGlobal implements Serializable, IdFunctionCall { static final long serialVersionUID = 6080442165748707530L; public static void init(Context cx, Scriptable scope, boolean sealed) { NativeGlobal obj = new NativeGlobal(); for (int id = 1; id <= LAST_SCOPE_FUNCTION_ID; ++id) { String name; int arity = 1; switch (id) { case Id_decodeURI: name = "decodeURI"; break; case Id_decodeURIComponent: name = "decodeURIComponent"; break; case Id_encodeURI: name = "encodeURI"; break; case Id_encodeURIComponent: name = "encodeURIComponent"; break; case Id_escape: name = "escape"; break; case Id_eval: name = "eval"; break; case Id_isFinite: name = "isFinite"; break; case Id_isNaN: name = "isNaN"; break; case Id_isXMLName: name = "isXMLName"; break; case Id_parseFloat: name = "parseFloat"; break; case Id_parseInt: name = "parseInt"; arity = 2; break; case Id_unescape: name = "unescape"; break; case Id_uneval: name = "uneval"; break; default: throw Kit.codeBug(); } IdFunctionObject f = new IdFunctionObject(obj, FTAG, id, name, arity, scope); if (sealed) { f.sealObject(); } f.exportAsScopeProperty(); } ScriptableObject.defineProperty( scope, "NaN", ScriptRuntime.NaNobj, ScriptableObject.DONTENUM); ScriptableObject.defineProperty( scope, "Infinity", ScriptRuntime.wrapNumber(Double.POSITIVE_INFINITY), ScriptableObject.DONTENUM); ScriptableObject.defineProperty( scope, "undefined", Undefined.instance, ScriptableObject.DONTENUM); String[] errorMethods = { "ConversionError", "EvalError", "RangeError", "ReferenceError", "SyntaxError", "TypeError", "URIError", "InternalError", "JavaException" }; /* Each error constructor gets its own Error object as a prototype, with the 'name' property set to the name of the error. */ for (int i = 0; i < errorMethods.length; i++) { String name = errorMethods[i]; Scriptable errorProto = ScriptRuntime. newObject(cx, scope, "Error", ScriptRuntime.emptyArgs); errorProto.put("name", errorProto, name); if (sealed) { if (errorProto instanceof ScriptableObject) { ((ScriptableObject)errorProto).sealObject(); } } IdFunctionObject ctor = new IdFunctionObject(obj, FTAG, Id_new_CommonError, name, 1, scope); ctor.markAsConstructor(errorProto); if (sealed) { ctor.sealObject(); } ctor.exportAsScopeProperty(); } } public Object execIdCall(IdFunctionObject f, Context cx, Scriptable scope, Scriptable thisObj, Object[] args) { if (f.hasTag(FTAG)) { int methodId = f.methodId(); switch (methodId) { case Id_decodeURI: case Id_decodeURIComponent: { String str = ScriptRuntime.toString(args, 0); return decode(str, methodId == Id_decodeURI); } case Id_encodeURI: case Id_encodeURIComponent: { String str = ScriptRuntime.toString(args, 0); return encode(str, methodId == Id_encodeURI); } case Id_escape: return js_escape(args); case Id_eval: return js_eval(cx, scope, thisObj, args); case Id_isFinite: { boolean result; if (args.length < 1) { result = false; } else { double d = ScriptRuntime.toNumber(args[0]); result = (d == d && d != Double.POSITIVE_INFINITY && d != Double.NEGATIVE_INFINITY); } return ScriptRuntime.wrapBoolean(result); } case Id_isNaN: { // The global method isNaN, as per ECMA-262 15.1.2.6. boolean result; if (args.length < 1) { result = true; } else { double d = ScriptRuntime.toNumber(args[0]); result = (d != d); } return ScriptRuntime.wrapBoolean(result); } case Id_isXMLName: { Object name = (args.length == 0) ? Undefined.instance : args[0]; XMLLib xmlLib = XMLLib.extractFromScope(scope); return ScriptRuntime.wrapBoolean( xmlLib.isXMLName(cx, name)); } case Id_parseFloat: return js_parseFloat(args); case Id_parseInt: return js_parseInt(args); case Id_unescape: return js_unescape(args); case Id_uneval: { Object value = (args.length != 0) ? args[0] : Undefined.instance; return ScriptRuntime.uneval(cx, scope, value); } case Id_new_CommonError: // The implementation of all the ECMA error constructors // (SyntaxError, TypeError, etc.) return NativeError.make(cx, scope, f, args); } } throw f.unknown(); } /** * The global method parseInt, as per ECMA-262 15.1.2.2. */ private Object js_parseInt(Object[] args) { String s = ScriptRuntime.toString(args, 0); int radix = ScriptRuntime.toInt32(args, 1); int len = s.length(); if (len == 0) return ScriptRuntime.NaNobj; boolean negative = false; int start = 0; char c; do { c = s.charAt(start); if (!Character.isWhitespace(c)) break; start++; } while (start < len); if (c == '+' || (negative = (c == '-'))) start++; final int NO_RADIX = -1; if (radix == 0) { radix = NO_RADIX; } else if (radix < 2 || radix > 36) { return ScriptRuntime.NaNobj; } else if (radix == 16 && len - start > 1 && s.charAt(start) == '0') { c = s.charAt(start+1); if (c == 'x' || c == 'X') start += 2; } if (radix == NO_RADIX) { radix = 10; if (len - start > 1 && s.charAt(start) == '0') { c = s.charAt(start+1); if (c == 'x' || c == 'X') { radix = 16; start += 2; } else if ('0' <= c && c <= '9') { radix = 8; start++; } } } double d = ScriptRuntime.stringToNumber(s, start, radix); return ScriptRuntime.wrapNumber(negative ? -d : d); } /** * The global method parseFloat, as per ECMA-262 15.1.2.3. * * @param args the arguments to parseFloat, ignoring args[>=1] */ private Object js_parseFloat(Object[] args) { if (args.length < 1) return ScriptRuntime.NaNobj; String s = ScriptRuntime.toString(args[0]); int len = s.length(); int start = 0; // Scan forward to skip whitespace char c; for (;;) { if (start == len) { return ScriptRuntime.NaNobj; } c = s.charAt(start); if (!TokenStream.isJSSpace(c)) { break; } ++start; } int i = start; if (c == '+' || c == '-') { ++i; if (i == len) { return ScriptRuntime.NaNobj; } c = s.charAt(i); } if (c == 'I') { // check for "Infinity" if (i+8 <= len && s.regionMatches(i, "Infinity", 0, 8)) { double d; if (s.charAt(start) == '-') { d = Double.NEGATIVE_INFINITY; } else { d = Double.POSITIVE_INFINITY; } return ScriptRuntime.wrapNumber(d); } return ScriptRuntime.NaNobj; } // Find the end of the legal bit int decimal = -1; int exponent = -1; for (; i < len; i++) { switch (s.charAt(i)) { case '.': if (decimal != -1) // Only allow a single decimal point. break; decimal = i; continue; case 'e': case 'E': if (exponent != -1) break; exponent = i; continue; case '+': case '-': // Only allow '+' or '-' after 'e' or 'E' if (exponent != i-1) break; continue; case '0': case '1': case '2': case '3': case '4': case '5': case '6': case '7': case '8': case '9': continue; default: break; } break; } s = s.substring(start, i); try { return Double.valueOf(s); } catch (NumberFormatException ex) { return ScriptRuntime.NaNobj; } } /** * The global method escape, as per ECMA-262 15.1.2.4. * Includes code for the 'mask' argument supported by the C escape * method, which used to be part of the browser imbedding. Blame * for the strange constant names should be directed there. */ private Object js_escape(Object[] args) { final int URL_XALPHAS = 1, URL_XPALPHAS = 2, URL_PATH = 4; String s = ScriptRuntime.toString(args, 0); int mask = URL_XALPHAS | URL_XPALPHAS | URL_PATH; if (args.length > 1) { // the 'mask' argument. Non-ECMA. double d = ScriptRuntime.toNumber(args[1]); if (d != d || ((mask = (int) d) != d) || 0 != (mask & ~(URL_XALPHAS | URL_XPALPHAS | URL_PATH))) { throw Context.reportRuntimeError0("msg.bad.esc.mask"); } } StringBuffer sb = null; for (int k = 0, L = s.length(); k != L; ++k) { int c = s.charAt(k); if (mask != 0 && ((c >= '0' && c <= '9') || (c >= 'A' && c <= 'Z') || (c >= 'a' && c <= 'z') || c == '@' || c == '*' || c == '_' || c == '-' || c == '.' || (0 != (mask & URL_PATH) && (c == '/' || c == '+')))) { if (sb != null) { sb.append((char)c); } } else { if (sb == null) { sb = new StringBuffer(L + 3); sb.append(s); sb.setLength(k); } int hexSize; if (c < 256) { if (c == ' ' && mask == URL_XPALPHAS) { sb.append('+'); continue; } sb.append('%'); hexSize = 2; } else { sb.append('%'); sb.append('u'); hexSize = 4; } // append hexadecimal form of c left-padded with 0 for (int shift = (hexSize - 1) * 4; shift >= 0; shift -= 4) { int digit = 0xf & (c >> shift); int hc = (digit < 10) ? '0' + digit : 'A' - 10 + digit; sb.append((char)hc); } } } return (sb == null) ? s : sb.toString(); } /** * The global unescape method, as per ECMA-262 15.1.2.5. */ private Object js_unescape(Object[] args) { String s = ScriptRuntime.toString(args, 0); int firstEscapePos = s.indexOf('%'); if (firstEscapePos >= 0) { int L = s.length(); char[] buf = s.toCharArray(); int destination = firstEscapePos; for (int k = firstEscapePos; k != L;) { char c = buf[k]; ++k; if (c == '%' && k != L) { int end, start; if (buf[k] == 'u') { start = k + 1; end = k + 5; } else { start = k; end = k + 2; } if (end <= L) { int x = 0; for (int i = start; i != end; ++i) { x = Kit.xDigitToInt(buf[i], x); } if (x >= 0) { c = (char)x; k = end; } } } buf[destination] = c; ++destination; } s = new String(buf, 0, destination); } return s; } private Object js_eval(Context cx, Scriptable scope, Scriptable thisObj, Object[] args) { if (thisObj.getParentScope() == null) { // We allow indirect calls to eval as long as the script will execute in // the global scope. return ScriptRuntime.evalSpecial(cx, scope, thisObj, args, "eval code", 1); } String m = ScriptRuntime.getMessage1("msg.cant.call.indirect", "eval"); throw NativeGlobal.constructError(cx, "EvalError", m, scope); } static boolean isEvalFunction(Object functionObj) { if (functionObj instanceof IdFunctionObject) { IdFunctionObject function = (IdFunctionObject)functionObj; if (function.hasTag(FTAG) && function.methodId() == Id_eval) { return true; } } return false; } /** * @deprecated Use {@link ScriptRuntime#constructError(String,String)} * instead. */ public static EcmaError constructError(Context cx, String error, String message, Scriptable scope) { return ScriptRuntime.constructError(error, message); } /** * @deprecated Use * {@link ScriptRuntime#constructError(String,String,String,int,String,int)} * instead. */ public static EcmaError constructError(Context cx, String error, String message, Scriptable scope, String sourceName, int lineNumber, int columnNumber, String lineSource) { return ScriptRuntime.constructError(error, message, sourceName, lineNumber, lineSource, columnNumber); } /* * ECMA 3, 15.1.3 URI Handling Function Properties * * The following are implementations of the algorithms * given in the ECMA specification for the hidden functions * 'Encode' and 'Decode'. */ private static String encode(String str, boolean fullUri) { byte[] utf8buf = null; StringBuffer sb = null; for (int k = 0, length = str.length(); k != length; ++k) { char C = str.charAt(k); if (encodeUnescaped(C, fullUri)) { if (sb != null) { sb.append(C); } } else { if (sb == null) { sb = new StringBuffer(length + 3); sb.append(str); sb.setLength(k); utf8buf = new byte[6]; } if (0xDC00 <= C && C <= 0xDFFF) { throw Context.reportRuntimeError0("msg.bad.uri"); } int V; if (C < 0xD800 || 0xDBFF < C) { V = C; } else { k++; if (k == length) { throw Context.reportRuntimeError0("msg.bad.uri"); } char C2 = str.charAt(k); if (!(0xDC00 <= C2 && C2 <= 0xDFFF)) { throw Context.reportRuntimeError0("msg.bad.uri"); } V = ((C - 0xD800) << 10) + (C2 - 0xDC00) + 0x10000; } int L = oneUcs4ToUtf8Char(utf8buf, V); for (int j = 0; j < L; j++) { int d = 0xff & utf8buf[j]; sb.append('%'); sb.append(toHexChar(d >>> 4)); sb.append(toHexChar(d & 0xf)); } } } return (sb == null) ? str : sb.toString(); } private static char toHexChar(int i) { if (i >> 4 != 0) Kit.codeBug(); return (char)((i < 10) ? i + '0' : i - 10 + 'A'); } private static int unHex(char c) { if ('A' <= c && c <= 'F') { return c - 'A' + 10; } else if ('a' <= c && c <= 'f') { return c - 'a' + 10; } else if ('0' <= c && c <= '9') { return c - '0'; } else { return -1; } } private static int unHex(char c1, char c2) { int i1 = unHex(c1); int i2 = unHex(c2); if (i1 >= 0 && i2 >= 0) { return (i1 << 4) | i2; } return -1; } private static String decode(String str, boolean fullUri) { char[] buf = null; int bufTop = 0; for (int k = 0, length = str.length(); k != length;) { char C = str.charAt(k); if (C != '%') { if (buf != null) { buf[bufTop++] = C; } ++k; } else { if (buf == null) { // decode always compress so result can not be bigger then // str.length() buf = new char[length]; str.getChars(0, k, buf, 0); bufTop = k; } int start = k; if (k + 3 > length) throw Context.reportRuntimeError0("msg.bad.uri"); int B = unHex(str.charAt(k + 1), str.charAt(k + 2)); if (B < 0) throw Context.reportRuntimeError0("msg.bad.uri"); k += 3; if ((B & 0x80) == 0) { C = (char)B; } else { // Decode UTF-8 sequence into ucs4Char and encode it into // UTF-16 int utf8Tail, ucs4Char, minUcs4Char; if ((B & 0xC0) == 0x80) { // First UTF-8 should be ouside 0x80..0xBF throw Context.reportRuntimeError0("msg.bad.uri"); } else if ((B & 0x20) == 0) { utf8Tail = 1; ucs4Char = B & 0x1F; minUcs4Char = 0x80; } else if ((B & 0x10) == 0) { utf8Tail = 2; ucs4Char = B & 0x0F; minUcs4Char = 0x800; } else if ((B & 0x08) == 0) { utf8Tail = 3; ucs4Char = B & 0x07; minUcs4Char = 0x10000; } else if ((B & 0x04) == 0) { utf8Tail = 4; ucs4Char = B & 0x03; minUcs4Char = 0x200000; } else if ((B & 0x02) == 0) { utf8Tail = 5; ucs4Char = B & 0x01; minUcs4Char = 0x4000000; } else { // First UTF-8 can not be 0xFF or 0xFE throw Context.reportRuntimeError0("msg.bad.uri"); } if (k + 3 * utf8Tail > length) throw Context.reportRuntimeError0("msg.bad.uri"); for (int j = 0; j != utf8Tail; j++) { if (str.charAt(k) != '%') throw Context.reportRuntimeError0("msg.bad.uri"); B = unHex(str.charAt(k + 1), str.charAt(k + 2)); if (B < 0 || (B & 0xC0) != 0x80) throw Context.reportRuntimeError0("msg.bad.uri"); ucs4Char = (ucs4Char << 6) | (B & 0x3F); k += 3; } // Check for overlongs and other should-not-present codes if (ucs4Char < minUcs4Char || ucs4Char == 0xFFFE || ucs4Char == 0xFFFF) { ucs4Char = 0xFFFD; } if (ucs4Char >= 0x10000) { ucs4Char -= 0x10000; if (ucs4Char > 0xFFFFF) throw Context.reportRuntimeError0("msg.bad.uri"); char H = (char)((ucs4Char >>> 10) + 0xD800); C = (char)((ucs4Char & 0x3FF) + 0xDC00); buf[bufTop++] = H; } else { C = (char)ucs4Char; } } if (fullUri && URI_DECODE_RESERVED.indexOf(C) >= 0) { for (int x = start; x != k; x++) { buf[bufTop++] = str.charAt(x); } } else { buf[bufTop++] = C; } } } return (buf == null) ? str : new String(buf, 0, bufTop); } private static boolean encodeUnescaped(char c, boolean fullUri) { if (('A' <= c && c <= 'Z') || ('a' <= c && c <= 'z') || ('0' <= c && c <= '9')) { return true; } if ("-_.!~*'()".indexOf(c) >= 0) return true; if (fullUri) { return URI_DECODE_RESERVED.indexOf(c) >= 0; } return false; } private static final String URI_DECODE_RESERVED = ";/?:@&=+$,#"; /* Convert one UCS-4 char and write it into a UTF-8 buffer, which must be * at least 6 bytes long. Return the number of UTF-8 bytes of data written. */ private static int oneUcs4ToUtf8Char(byte[] utf8Buffer, int ucs4Char) { int utf8Length = 1; //JS_ASSERT(ucs4Char <= 0x7FFFFFFF); if ((ucs4Char & ~0x7F) == 0) utf8Buffer[0] = (byte)ucs4Char; else { int i; int a = ucs4Char >>> 11; utf8Length = 2; while (a != 0) { a >>>= 5; utf8Length++; } i = utf8Length; while (--i > 0) { utf8Buffer[i] = (byte)((ucs4Char & 0x3F) | 0x80); ucs4Char >>>= 6; } utf8Buffer[0] = (byte)(0x100 - (1 << (8-utf8Length)) + ucs4Char); } return utf8Length; } private static final Object FTAG = "Global"; private static final int Id_decodeURI = 1, Id_decodeURIComponent = 2, Id_encodeURI = 3, Id_encodeURIComponent = 4, Id_escape = 5, Id_eval = 6, Id_isFinite = 7, Id_isNaN = 8, Id_isXMLName = 9, Id_parseFloat = 10, Id_parseInt = 11, Id_unescape = 12, Id_uneval = 13, LAST_SCOPE_FUNCTION_ID = 13, Id_new_CommonError = 14; }