colonymech / docs / www / colonyscout / internal / includes / uploadify / com / adobe / net / URIEncodingBitmap.as @ f59acf11
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/* |
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Copyright (c) 2008, Adobe Systems Incorporated |
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All rights reserved. |
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|
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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 notice, |
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this list of conditions and the following disclaimer. |
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|
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* Redistributions in binary form must reproduce the above copyright |
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notice, this list of conditions and the following disclaimer in the |
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documentation and/or other materials provided with the distribution. |
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|
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* Neither the name of Adobe Systems Incorporated nor the names of its |
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contributors may be used to endorse or promote products derived from |
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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 "AS |
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IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, |
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THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
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PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR |
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CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
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EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
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PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
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PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF |
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LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING |
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NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
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SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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*/ |
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|
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package com.adobe.net |
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{ |
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import flash.utils.ByteArray; |
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|
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/** |
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* This class implements an efficient lookup table for URI |
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* character escaping. This class is only needed if you |
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* create a derived class of URI to handle custom URI |
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* syntax. This class is used internally by URI. |
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* |
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* @langversion ActionScript 3.0 |
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* @playerversion Flash 9.0* |
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*/ |
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public class URIEncodingBitmap extends ByteArray |
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{ |
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/** |
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* Constructor. Creates an encoding bitmap using the given |
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* string of characters as the set of characters that need |
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* to be URI escaped. |
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* |
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* @langversion ActionScript 3.0 |
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* @playerversion Flash 9.0 |
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*/ |
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public function URIEncodingBitmap(charsToEscape:String) : void |
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{ |
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var i:int; |
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var data:ByteArray = new ByteArray(); |
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|
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// Initialize our 128 bits (16 bytes) to zero |
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for (i = 0; i < 16; i++) |
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this.writeByte(0); |
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|
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data.writeUTFBytes(charsToEscape); |
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data.position = 0; |
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|
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while (data.bytesAvailable) |
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{ |
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var c:int = data.readByte(); |
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|
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if (c > 0x7f) |
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continue; // only escape low bytes |
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|
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var enc:int; |
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this.position = (c >> 3); |
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enc = this.readByte(); |
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enc |= 1 << (c & 0x7); |
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this.position = (c >> 3); |
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this.writeByte(enc); |
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} |
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} |
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|
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/** |
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* Based on the data table contained in this object, check |
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* if the given character should be escaped. |
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* |
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* @param char the character to be escaped. Only the first |
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* character in the string is used. Any other characters |
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* are ignored. |
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* |
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* @return the integer value of the raw UTF8 character. For |
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* example, if '%' is given, the return value is 37 (0x25). |
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* If the character given does not need to be escaped, the |
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* return value is zero. |
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* |
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* @langversion ActionScript 3.0 |
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* @playerversion Flash 9.0 |
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*/ |
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public function ShouldEscape(char:String) : int |
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{ |
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var data:ByteArray = new ByteArray(); |
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var c:int, mask:int; |
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|
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// write the character into a ByteArray so |
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// we can pull it out as a raw byte value. |
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data.writeUTFBytes(char); |
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data.position = 0; |
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c = data.readByte(); |
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|
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if (c & 0x80) |
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{ |
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// don't escape high byte characters. It can make international |
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// URI's unreadable. We just want to escape characters that would |
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// make URI syntax ambiguous. |
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return 0; |
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} |
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else if ((c < 0x1f) || (c == 0x7f)) |
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{ |
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// control characters must be escaped. |
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return c; |
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} |
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|
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this.position = (c >> 3); |
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mask = this.readByte(); |
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|
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if (mask & (1 << (c & 0x7))) |
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{ |
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// we need to escape this, return the numeric value |
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// of the character |
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return c; |
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} |
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else |
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{ |
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return 0; |
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} |
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} |
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} |
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} |