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Diffstat (limited to 'vendors/uploadify/com/adobe/serialization/json/JSONTokenizer.as')
| -rw-r--r-- | vendors/uploadify/com/adobe/serialization/json/JSONTokenizer.as | 583 |
1 files changed, 0 insertions, 583 deletions
diff --git a/vendors/uploadify/com/adobe/serialization/json/JSONTokenizer.as b/vendors/uploadify/com/adobe/serialization/json/JSONTokenizer.as deleted file mode 100644 index dc36bfcdd..000000000 --- a/vendors/uploadify/com/adobe/serialization/json/JSONTokenizer.as +++ /dev/null @@ -1,583 +0,0 @@ -/*
- Copyright (c) 2008, Adobe Systems Incorporated
- All rights reserved.
-
- Redistribution and use in source and binary forms, with or without
- modification, are permitted provided that the following conditions are
- met:
-
- * Redistributions of source code must retain the above copyright notice,
- this list of conditions and the following disclaimer.
-
- * Redistributions in binary form must reproduce the above copyright
- notice, this list of conditions and the following disclaimer in the
- documentation and/or other materials provided with the distribution.
-
- * Neither the name of Adobe Systems Incorporated nor the names of its
- contributors may be used to endorse or promote products derived from
- this software without specific prior written permission.
-
- THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
- IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
- THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
- CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
- EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
- PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
- PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
- LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
- NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
- SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-*/
-
-package com.adobe.serialization.json {
-
- public class JSONTokenizer {
-
- /** The object that will get parsed from the JSON string */
- private var obj:Object;
-
- /** The JSON string to be parsed */
- private var jsonString:String;
-
- /** The current parsing location in the JSON string */
- private var loc:int;
-
- /** The current character in the JSON string during parsing */
- private var ch:String;
-
- /**
- * Constructs a new JSONDecoder to parse a JSON string
- * into a native object.
- *
- * @param s The JSON string to be converted
- * into a native object
- */
- public function JSONTokenizer( s:String ) {
- jsonString = s;
- loc = 0;
-
- // prime the pump by getting the first character
- nextChar();
- }
-
- /**
- * Gets the next token in the input sting and advances
- * the character to the next character after the token
- */
- public function getNextToken():JSONToken {
- var token:JSONToken = new JSONToken();
-
- // skip any whitespace / comments since the last
- // token was read
- skipIgnored();
-
- // examine the new character and see what we have...
- switch ( ch ) {
-
- case '{':
- token.type = JSONTokenType.LEFT_BRACE;
- token.value = '{';
- nextChar();
- break
-
- case '}':
- token.type = JSONTokenType.RIGHT_BRACE;
- token.value = '}';
- nextChar();
- break
-
- case '[':
- token.type = JSONTokenType.LEFT_BRACKET;
- token.value = '[';
- nextChar();
- break
-
- case ']':
- token.type = JSONTokenType.RIGHT_BRACKET;
- token.value = ']';
- nextChar();
- break
-
- case ',':
- token.type = JSONTokenType.COMMA;
- token.value = ',';
- nextChar();
- break
-
- case ':':
- token.type = JSONTokenType.COLON;
- token.value = ':';
- nextChar();
- break;
-
- case 't': // attempt to read true
- var possibleTrue:String = "t" + nextChar() + nextChar() + nextChar();
-
- if ( possibleTrue == "true" ) {
- token.type = JSONTokenType.TRUE;
- token.value = true;
- nextChar();
- } else {
- parseError( "Expecting 'true' but found " + possibleTrue );
- }
-
- break;
-
- case 'f': // attempt to read false
- var possibleFalse:String = "f" + nextChar() + nextChar() + nextChar() + nextChar();
-
- if ( possibleFalse == "false" ) {
- token.type = JSONTokenType.FALSE;
- token.value = false;
- nextChar();
- } else {
- parseError( "Expecting 'false' but found " + possibleFalse );
- }
-
- break;
-
- case 'n': // attempt to read null
-
- var possibleNull:String = "n" + nextChar() + nextChar() + nextChar();
-
- if ( possibleNull == "null" ) {
- token.type = JSONTokenType.NULL;
- token.value = null;
- nextChar();
- } else {
- parseError( "Expecting 'null' but found " + possibleNull );
- }
-
- break;
-
- case '"': // the start of a string
- token = readString();
- break;
-
- default:
- // see if we can read a number
- if ( isDigit( ch ) || ch == '-' ) {
- token = readNumber();
- } else if ( ch == '' ) {
- // check for reading past the end of the string
- return null;
- } else {
- // not sure what was in the input string - it's not
- // anything we expected
- parseError( "Unexpected " + ch + " encountered" );
- }
- }
-
- return token;
- }
-
- /**
- * Attempts to read a string from the input string. Places
- * the character location at the first character after the
- * string. It is assumed that ch is " before this method is called.
- *
- * @return the JSONToken with the string value if a string could
- * be read. Throws an error otherwise.
- */
- private function readString():JSONToken {
- // the token for the string we'll try to read
- var token:JSONToken = new JSONToken();
- token.type = JSONTokenType.STRING;
-
- // the string to store the string we'll try to read
- var string:String = "";
-
- // advance past the first "
- nextChar();
-
- while ( ch != '"' && ch != '' ) {
-
- // unescape the escape sequences in the string
- if ( ch == '\\' ) {
-
- // get the next character so we know what
- // to unescape
- nextChar();
-
- switch ( ch ) {
-
- case '"': // quotation mark
- string += '"';
- break;
-
- case '/': // solidus
- string += "/";
- break;
-
- case '\\': // reverse solidus
- string += '\\';
- break;
-
- case 'b': // bell
- string += '\b';
- break;
-
- case 'f': // form feed
- string += '\f';
- break;
-
- case 'n': // newline
- string += '\n';
- break;
-
- case 'r': // carriage return
- string += '\r';
- break;
-
- case 't': // horizontal tab
- string += '\t'
- break;
-
- case 'u':
- // convert a unicode escape sequence
- // to it's character value - expecting
- // 4 hex digits
-
- // save the characters as a string we'll convert to an int
- var hexValue:String = "";
-
- // try to find 4 hex characters
- for ( var i:int = 0; i < 4; i++ ) {
- // get the next character and determine
- // if it's a valid hex digit or not
- if ( !isHexDigit( nextChar() ) ) {
- parseError( " Excepted a hex digit, but found: " + ch );
- }
- // valid, add it to the value
- hexValue += ch;
- }
-
- // convert hexValue to an integer, and use that
- // integrer value to create a character to add
- // to our string.
- string += String.fromCharCode( parseInt( hexValue, 16 ) );
-
- break;
-
- default:
- // couldn't unescape the sequence, so just
- // pass it through
- string += '\\' + ch;
-
- }
-
- } else {
- // didn't have to unescape, so add the character to the string
- string += ch;
-
- }
-
- // move to the next character
- nextChar();
-
- }
-
- // we read past the end of the string without closing it, which
- // is a parse error
- if ( ch == '' ) {
- parseError( "Unterminated string literal" );
- }
-
- // move past the closing " in the input string
- nextChar();
-
- // attach to the string to the token so we can return it
- token.value = string;
-
- return token;
- }
-
- /**
- * Attempts to read a number from the input string. Places
- * the character location at the first character after the
- * number.
- *
- * @return The JSONToken with the number value if a number could
- * be read. Throws an error otherwise.
- */
- private function readNumber():JSONToken {
- // the token for the number we'll try to read
- var token:JSONToken = new JSONToken();
- token.type = JSONTokenType.NUMBER;
-
- // the string to accumulate the number characters
- // into that we'll convert to a number at the end
- var input:String = "";
-
- // check for a negative number
- if ( ch == '-' ) {
- input += '-';
- nextChar();
- }
-
- // the number must start with a digit
- if ( !isDigit( ch ) )
- {
- parseError( "Expecting a digit" );
- }
-
- // 0 can only be the first digit if it
- // is followed by a decimal point
- if ( ch == '0' )
- {
- input += ch;
- nextChar();
-
- // make sure no other digits come after 0
- if ( isDigit( ch ) )
- {
- parseError( "A digit cannot immediately follow 0" );
- }
-// Commented out - this should only be available when "strict" is false
-// // unless we have 0x which starts a hex number\
-// else if ( ch == 'x' )
-// {
-// // include the x in the input
-// input += ch;
-// nextChar();
-//
-// // need at least one hex digit after 0x to
-// // be valid
-// if ( isHexDigit( ch ) )
-// {
-// input += ch;
-// nextChar();
-// }
-// else
-// {
-// parseError( "Number in hex format require at least one hex digit after \"0x\"" );
-// }
-//
-// // consume all of the hex values
-// while ( isHexDigit( ch ) )
-// {
-// input += ch;
-// nextChar();
-// }
-// }
- }
- else
- {
- // read numbers while we can
- while ( isDigit( ch ) ) {
- input += ch;
- nextChar();
- }
- }
-
- // check for a decimal value
- if ( ch == '.' ) {
- input += '.';
- nextChar();
-
- // after the decimal there has to be a digit
- if ( !isDigit( ch ) )
- {
- parseError( "Expecting a digit" );
- }
-
- // read more numbers to get the decimal value
- while ( isDigit( ch ) ) {
- input += ch;
- nextChar();
- }
- }
-
- // check for scientific notation
- if ( ch == 'e' || ch == 'E' )
- {
- input += "e"
- nextChar();
- // check for sign
- if ( ch == '+' || ch == '-' )
- {
- input += ch;
- nextChar();
- }
-
- // require at least one number for the exponent
- // in this case
- if ( !isDigit( ch ) )
- {
- parseError( "Scientific notation number needs exponent value" );
- }
-
- // read in the exponent
- while ( isDigit( ch ) )
- {
- input += ch;
- nextChar();
- }
- }
-
- // convert the string to a number value
- var num:Number = Number( input );
-
- if ( isFinite( num ) && !isNaN( num ) ) {
- token.value = num;
- return token;
- } else {
- parseError( "Number " + num + " is not valid!" );
- }
- return null;
- }
-
- /**
- * Reads the next character in the input
- * string and advances the character location.
- *
- * @return The next character in the input string, or
- * null if we've read past the end.
- */
- private function nextChar():String {
- return ch = jsonString.charAt( loc++ );
- }
-
- /**
- * Advances the character location past any
- * sort of white space and comments
- */
- private function skipIgnored():void
- {
- var originalLoc:int;
-
- // keep trying to skip whitespace and comments as long
- // as we keep advancing past the original location
- do
- {
- originalLoc = loc;
- skipWhite();
- skipComments();
- }
- while ( originalLoc != loc );
- }
-
- /**
- * Skips comments in the input string, either
- * single-line or multi-line. Advances the character
- * to the first position after the end of the comment.
- */
- private function skipComments():void {
- if ( ch == '/' ) {
- // Advance past the first / to find out what type of comment
- nextChar();
- switch ( ch ) {
- case '/': // single-line comment, read through end of line
-
- // Loop over the characters until we find
- // a newline or until there's no more characters left
- do {
- nextChar();
- } while ( ch != '\n' && ch != '' )
-
- // move past the \n
- nextChar();
-
- break;
-
- case '*': // multi-line comment, read until closing */
-
- // move past the opening *
- nextChar();
-
- // try to find a trailing */
- while ( true ) {
- if ( ch == '*' ) {
- // check to see if we have a closing /
- nextChar();
- if ( ch == '/') {
- // move past the end of the closing */
- nextChar();
- break;
- }
- } else {
- // move along, looking if the next character is a *
- nextChar();
- }
-
- // when we're here we've read past the end of
- // the string without finding a closing */, so error
- if ( ch == '' ) {
- parseError( "Multi-line comment not closed" );
- }
- }
-
- break;
-
- // Can't match a comment after a /, so it's a parsing error
- default:
- parseError( "Unexpected " + ch + " encountered (expecting '/' or '*' )" );
- }
- }
-
- }
-
-
- /**
- * Skip any whitespace in the input string and advances
- * the character to the first character after any possible
- * whitespace.
- */
- private function skipWhite():void {
-
- // As long as there are spaces in the input
- // stream, advance the current location pointer
- // past them
- while ( isWhiteSpace( ch ) ) {
- nextChar();
- }
-
- }
-
- /**
- * Determines if a character is whitespace or not.
- *
- * @return True if the character passed in is a whitespace
- * character
- */
- private function isWhiteSpace( ch:String ):Boolean {
- return ( ch == ' ' || ch == '\t' || ch == '\n' || ch == '\r' );
- }
-
- /**
- * Determines if a character is a digit [0-9].
- *
- * @return True if the character passed in is a digit
- */
- private function isDigit( ch:String ):Boolean {
- return ( ch >= '0' && ch <= '9' );
- }
-
- /**
- * Determines if a character is a digit [0-9].
- *
- * @return True if the character passed in is a digit
- */
- private function isHexDigit( ch:String ):Boolean {
- // get the uppercase value of ch so we only have
- // to compare the value between 'A' and 'F'
- var uc:String = ch.toUpperCase();
-
- // a hex digit is a digit of A-F, inclusive ( using
- // our uppercase constraint )
- return ( isDigit( ch ) || ( uc >= 'A' && uc <= 'F' ) );
- }
-
- /**
- * Raises a parsing error with a specified message, tacking
- * on the error location and the original string.
- *
- * @param message The message indicating why the error occurred
- */
- public function parseError( message:String ):void {
- throw new JSONParseError( message, loc, jsonString );
- }
- }
-
-}
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