c7fccff9af
Multiline conditionals must use braces. Semicolons are not optional. Review URL: http://codereview.chromium.org/8701006 git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@10074 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
425 lines
12 KiB
JavaScript
425 lines
12 KiB
JavaScript
// Copyright 2006-2008 the V8 project authors. All rights reserved.
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following
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// disclaimer in the documentation and/or other materials provided
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// with the distribution.
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// * Neither the name of Google Inc. nor the names of its
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// contributors may be used to endorse or promote products derived
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// from this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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// This file contains support for URI manipulations written in
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// JavaScript.
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// Expect $String = global.String;
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// Lazily initialized.
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var hexCharArray = 0;
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var hexCharCodeArray = 0;
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function URIAddEncodedOctetToBuffer(octet, result, index) {
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result[index++] = 37; // Char code of '%'.
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result[index++] = hexCharCodeArray[octet >> 4];
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result[index++] = hexCharCodeArray[octet & 0x0F];
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return index;
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}
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function URIEncodeOctets(octets, result, index) {
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if (hexCharCodeArray === 0) {
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hexCharCodeArray = [48, 49, 50, 51, 52, 53, 54, 55, 56, 57,
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65, 66, 67, 68, 69, 70];
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}
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index = URIAddEncodedOctetToBuffer(octets[0], result, index);
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if (octets[1]) index = URIAddEncodedOctetToBuffer(octets[1], result, index);
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if (octets[2]) index = URIAddEncodedOctetToBuffer(octets[2], result, index);
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if (octets[3]) index = URIAddEncodedOctetToBuffer(octets[3], result, index);
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return index;
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}
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function URIEncodeSingle(cc, result, index) {
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var x = (cc >> 12) & 0xF;
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var y = (cc >> 6) & 63;
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var z = cc & 63;
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var octets = new $Array(3);
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if (cc <= 0x007F) {
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octets[0] = cc;
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} else if (cc <= 0x07FF) {
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octets[0] = y + 192;
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octets[1] = z + 128;
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} else {
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octets[0] = x + 224;
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octets[1] = y + 128;
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octets[2] = z + 128;
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}
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return URIEncodeOctets(octets, result, index);
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}
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function URIEncodePair(cc1 , cc2, result, index) {
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var u = ((cc1 >> 6) & 0xF) + 1;
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var w = (cc1 >> 2) & 0xF;
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var x = cc1 & 3;
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var y = (cc2 >> 6) & 0xF;
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var z = cc2 & 63;
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var octets = new $Array(4);
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octets[0] = (u >> 2) + 240;
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octets[1] = (((u & 3) << 4) | w) + 128;
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octets[2] = ((x << 4) | y) + 128;
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octets[3] = z + 128;
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return URIEncodeOctets(octets, result, index);
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}
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function URIHexCharsToCharCode(highChar, lowChar) {
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var highCode = HexValueOf(highChar);
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var lowCode = HexValueOf(lowChar);
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if (highCode == -1 || lowCode == -1) {
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throw new $URIError("URI malformed");
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}
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return (highCode << 4) | lowCode;
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}
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function URIDecodeOctets(octets, result, index) {
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var value;
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var o0 = octets[0];
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if (o0 < 0x80) {
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value = o0;
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} else if (o0 < 0xc2) {
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throw new $URIError("URI malformed");
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} else {
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var o1 = octets[1];
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if (o0 < 0xe0) {
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var a = o0 & 0x1f;
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if ((o1 < 0x80) || (o1 > 0xbf)) {
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throw new $URIError("URI malformed");
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}
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var b = o1 & 0x3f;
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value = (a << 6) + b;
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if (value < 0x80 || value > 0x7ff) {
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throw new $URIError("URI malformed");
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}
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} else {
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var o2 = octets[2];
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if (o0 < 0xf0) {
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var a = o0 & 0x0f;
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if ((o1 < 0x80) || (o1 > 0xbf)) {
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throw new $URIError("URI malformed");
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}
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var b = o1 & 0x3f;
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if ((o2 < 0x80) || (o2 > 0xbf)) {
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throw new $URIError("URI malformed");
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}
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var c = o2 & 0x3f;
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value = (a << 12) + (b << 6) + c;
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if ((value < 0x800) || (value > 0xffff)) {
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throw new $URIError("URI malformed");
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}
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} else {
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var o3 = octets[3];
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if (o0 < 0xf8) {
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var a = (o0 & 0x07);
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if ((o1 < 0x80) || (o1 > 0xbf)) {
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throw new $URIError("URI malformed");
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}
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var b = (o1 & 0x3f);
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if ((o2 < 0x80) || (o2 > 0xbf)) {
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throw new $URIError("URI malformed");
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}
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var c = (o2 & 0x3f);
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if ((o3 < 0x80) || (o3 > 0xbf)) {
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throw new $URIError("URI malformed");
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}
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var d = (o3 & 0x3f);
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value = (a << 18) + (b << 12) + (c << 6) + d;
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if ((value < 0x10000) || (value > 0x10ffff)) {
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throw new $URIError("URI malformed");
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}
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} else {
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throw new $URIError("URI malformed");
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}
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}
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}
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}
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if (0xD800 <= value && value <= 0xDFFF) {
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throw new $URIError("URI malformed");
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}
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if (value < 0x10000) {
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result[index++] = value;
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return index;
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} else {
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result[index++] = (value >> 10) + 0xd7c0;
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result[index++] = (value & 0x3ff) + 0xdc00;
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return index;
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}
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}
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// ECMA-262, section 15.1.3
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function Encode(uri, unescape) {
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var uriLength = uri.length;
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// We are going to pass result to %StringFromCharCodeArray
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// which does not expect any getters/setters installed
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// on the incoming array.
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var result = new InternalArray(uriLength);
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var index = 0;
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for (var k = 0; k < uriLength; k++) {
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var cc1 = uri.charCodeAt(k);
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if (unescape(cc1)) {
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result[index++] = cc1;
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} else {
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if (cc1 >= 0xDC00 && cc1 <= 0xDFFF) throw new $URIError("URI malformed");
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if (cc1 < 0xD800 || cc1 > 0xDBFF) {
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index = URIEncodeSingle(cc1, result, index);
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} else {
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k++;
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if (k == uriLength) throw new $URIError("URI malformed");
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var cc2 = uri.charCodeAt(k);
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if (cc2 < 0xDC00 || cc2 > 0xDFFF) throw new $URIError("URI malformed");
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index = URIEncodePair(cc1, cc2, result, index);
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}
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}
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}
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return %StringFromCharCodeArray(result);
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}
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// ECMA-262, section 15.1.3
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function Decode(uri, reserved) {
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var uriLength = uri.length;
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// We are going to pass result to %StringFromCharCodeArray
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// which does not expect any getters/setters installed
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// on the incoming array.
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var result = new InternalArray(uriLength);
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var index = 0;
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for (var k = 0; k < uriLength; k++) {
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var ch = uri.charAt(k);
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if (ch == '%') {
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if (k + 2 >= uriLength) throw new $URIError("URI malformed");
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var cc = URIHexCharsToCharCode(uri.charCodeAt(++k), uri.charCodeAt(++k));
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if (cc >> 7) {
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var n = 0;
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while (((cc << ++n) & 0x80) != 0) { }
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if (n == 1 || n > 4) throw new $URIError("URI malformed");
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var octets = new $Array(n);
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octets[0] = cc;
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if (k + 3 * (n - 1) >= uriLength) throw new $URIError("URI malformed");
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for (var i = 1; i < n; i++) {
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if (uri.charAt(++k) != '%') throw new $URIError("URI malformed");
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octets[i] = URIHexCharsToCharCode(uri.charCodeAt(++k),
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uri.charCodeAt(++k));
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}
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index = URIDecodeOctets(octets, result, index);
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} else {
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if (reserved(cc)) {
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result[index++] = 37; // Char code of '%'.
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result[index++] = uri.charCodeAt(k - 1);
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result[index++] = uri.charCodeAt(k);
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} else {
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result[index++] = cc;
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}
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}
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} else {
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result[index++] = ch.charCodeAt(0);
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}
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}
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result.length = index;
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return %StringFromCharCodeArray(result);
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}
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// ECMA-262 - 15.1.3.1.
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function URIDecode(uri) {
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function reservedPredicate(cc) {
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// #$
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if (35 <= cc && cc <= 36) return true;
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// &
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if (cc == 38) return true;
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// +,
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if (43 <= cc && cc <= 44) return true;
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// /
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if (cc == 47) return true;
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// :;
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if (58 <= cc && cc <= 59) return true;
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// =
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if (cc == 61) return true;
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// ?@
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if (63 <= cc && cc <= 64) return true;
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return false;
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}
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var string = ToString(uri);
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return Decode(string, reservedPredicate);
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}
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// ECMA-262 - 15.1.3.2.
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function URIDecodeComponent(component) {
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function reservedPredicate(cc) { return false; }
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var string = ToString(component);
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return Decode(string, reservedPredicate);
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}
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// Does the char code correspond to an alpha-numeric char.
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function isAlphaNumeric(cc) {
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// a - z
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if (97 <= cc && cc <= 122) return true;
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// A - Z
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if (65 <= cc && cc <= 90) return true;
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// 0 - 9
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if (48 <= cc && cc <= 57) return true;
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return false;
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}
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// ECMA-262 - 15.1.3.3.
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function URIEncode(uri) {
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function unescapePredicate(cc) {
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if (isAlphaNumeric(cc)) return true;
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// !
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if (cc == 33) return true;
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// #$
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if (35 <= cc && cc <= 36) return true;
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// &'()*+,-./
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if (38 <= cc && cc <= 47) return true;
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// :;
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if (58 <= cc && cc <= 59) return true;
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// =
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if (cc == 61) return true;
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// ?@
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if (63 <= cc && cc <= 64) return true;
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// _
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if (cc == 95) return true;
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// ~
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if (cc == 126) return true;
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return false;
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}
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var string = ToString(uri);
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return Encode(string, unescapePredicate);
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}
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// ECMA-262 - 15.1.3.4
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function URIEncodeComponent(component) {
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function unescapePredicate(cc) {
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if (isAlphaNumeric(cc)) return true;
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// !
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if (cc == 33) return true;
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// '()*
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if (39 <= cc && cc <= 42) return true;
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// -.
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if (45 <= cc && cc <= 46) return true;
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// _
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if (cc == 95) return true;
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// ~
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if (cc == 126) return true;
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return false;
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}
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var string = ToString(component);
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return Encode(string, unescapePredicate);
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}
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function HexValueOf(code) {
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// 0-9
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if (code >= 48 && code <= 57) return code - 48;
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// A-F
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if (code >= 65 && code <= 70) return code - 55;
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// a-f
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if (code >= 97 && code <= 102) return code - 87;
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return -1;
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}
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// Convert a character code to 4-digit hex string representation
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// 64 -> 0040, 62234 -> F31A.
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function CharCodeToHex4Str(cc) {
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var r = "";
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if (hexCharArray === 0) {
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hexCharArray = ["0", "1", "2", "3", "4", "5", "6", "7", "8", "9",
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"A", "B", "C", "D", "E", "F"];
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}
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for (var i = 0; i < 4; ++i) {
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var c = hexCharArray[cc & 0x0F];
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r = c + r;
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cc = cc >>> 4;
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}
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return r;
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}
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// Returns true if all digits in string s are valid hex numbers
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function IsValidHex(s) {
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for (var i = 0; i < s.length; ++i) {
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var cc = s.charCodeAt(i);
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if ((48 <= cc && cc <= 57) ||
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(65 <= cc && cc <= 70) ||
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(97 <= cc && cc <= 102)) {
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// '0'..'9', 'A'..'F' and 'a' .. 'f'.
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} else {
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return false;
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}
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}
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return true;
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}
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// ECMA-262 - B.2.1.
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function URIEscape(str) {
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var s = ToString(str);
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return %URIEscape(s);
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}
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// ECMA-262 - B.2.2.
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function URIUnescape(str) {
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var s = ToString(str);
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return %URIUnescape(s);
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}
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// -------------------------------------------------------------------
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function SetUpUri() {
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%CheckIsBootstrapping();
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// Set up non-enumerable URI functions on the global object and set
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// their names.
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InstallFunctions(global, DONT_ENUM, $Array(
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"escape", URIEscape,
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"unescape", URIUnescape,
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"decodeURI", URIDecode,
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"decodeURIComponent", URIDecodeComponent,
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"encodeURI", URIEncode,
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"encodeURIComponent", URIEncodeComponent
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));
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}
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SetUpUri();
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