Created
February 15, 2011 13:52
-
-
Save think49/827547 to your computer and use it in GitHub Desktop.
abnf.js : RFC5234 規定の ABNF 文字列を ECMAScript5 の RegExp 準拠の文字列に変換する
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| /** | |
| * abnf.js | |
| * | |
| * [RFC 5234] Augmented BNF for Syntax Specifications: ABNF | |
| * http://www.ietf.org/rfc/rfc5234.txt | |
| * http://www.cam.hi-ho.ne.jp/mendoxi/rfc/rfc5234j.html | |
| * | |
| * @version 0.1 | |
| * @author think49 | |
| */ | |
| var ABNF; | |
| ABNF = (function () { | |
| function ABNFCoreRules () { | |
| var ALPHA, BIT, CHAR, CR, LF, CRLF, CTL, DIGIT, DQUOTE, HEXDIG, HTAB, OCTET, SP, VCHAR, WSP, LWSP; | |
| if (!(this instanceof ABNFCoreRules)) { | |
| return new ABNFCoreRules; | |
| } | |
| /** | |
| * [RFC 5234] B.1. Core Rules | |
| */ | |
| ALPHA = '[\u0041-\u005A\u0061-\u007A]'; // ; A-Z / a-z | |
| BIT = '[01]'; | |
| CHAR = '[\u0001-\u007F]'; // ; any 7-bit US-ASCII character, | |
| // ; excluding NUL | |
| CR = '\u000D'; // ; carriage return | |
| LF = '\u000A'; // ; linefeed | |
| CRLF = '[' + CR + LF + ']'; // ; Internet standard newline | |
| CTL = '[\u0000-\u001F\u007F]'; // ; controls | |
| DIGIT = '[\u0030-\u0039]'; // ; 0-9 | |
| DQUOTE = '\u0022'; // ; " (Double Quote) | |
| HEXDIG = '(?:' + DIGIT + '|[A-Z])'; | |
| HTAB = '\u0009'; // ; horizontal tab | |
| OCTET = '[\u0000-\u00FF]'; // ; 8 bits of data | |
| SP = '\u0020'; | |
| VCHAR = '[\u0021-\u007E]'; // ; visible (printing) characters | |
| WSP = '[' + SP + HTAB + ']'; // ; white space | |
| LWSP = '(?:' + WSP + '|' + CRLF + WSP + ')*'; // ; Use of this linear-white-space rule | |
| // ; permits lines containing only white | |
| // ; space that are no longer legal in | |
| // ; mail headers and have caused | |
| // ; interoperability problems in other | |
| // ; contexts. | |
| // ; Do not use when defining mail | |
| // ; headers and use with caution in | |
| // ; other contexts. | |
| this.ALPHA = ALPHA; | |
| this.BIT = BIT; | |
| this.CHAR = CHAR; | |
| this.CR = CR; | |
| this.LF = LF; | |
| this.CRLF = CRLF; | |
| this.CTL = CTL; | |
| this.DIGIT = DIGIT; | |
| this.DQUOTE = DQUOTE; | |
| this.HEXDIG = HEXDIG; | |
| this.HTAB = HTAB; | |
| this.OCTET = OCTET; | |
| this.SP = SP; | |
| this.VCHAR = VCHAR; | |
| this.WSP = WSP; | |
| this.LWSP = LWSP; | |
| return this; | |
| } | |
| function ABNFSyntax () { | |
| var coreRules, ALPHA, BIT, CRLF, DIGIT, DQUOTE, HEXDIG, VCHAR, WSP; | |
| if (!(this instanceof ABNFSyntax)) { | |
| return new ABNFSyntax; | |
| } | |
| coreRules = new ABNFCoreRules; | |
| ALPHA = coreRules.ALPHA; | |
| BIT = coreRules.BIT; | |
| CRLF = coreRules.CRLF; | |
| DIGIT = coreRules.DIGIT; | |
| DQUOTE = coreRules.DQUOTE; | |
| HEXDIG = coreRules.HEXDIG; | |
| VCHAR = coreRules.VCHAR; | |
| WSP = coreRules.WSP; | |
| /** | |
| * [RFC 5234] 4. ABNF Definition of ABNF | |
| */ | |
| rulename = ALPHA + '(?:' + ALPHA + '|' + DIGIT + '|-)*'; | |
| comment = ';(?:' + WSP + '|' + VCHAR + ')*' + CRLF; | |
| c_nl = '(?:' + comment + '|' + CRLF + ')'; // ; comment or newline | |
| c_wsp = '(?:' + WSP + '|' + c_nl + WSP + ')'; | |
| defined_as = '(?:' + c_wsp + ')*(?:' + ' = | = /)(?:' + c_wsp + ')*'; // ; basic rules definition and | |
| // ; incremental alternatives | |
| repeat = '(?:' + DIGIT + '+|' + DIGIT + '*\\*' + DIGIT + '*)'; | |
| element = '(?:' + rulename + '|' + group + '|' + option + '|' + char_val + '|' + num_val + '|' + prose_val + ')'; | |
| repetition = '(?:' + repeat + ')?' + element; | |
| concatenation = repetition + '(?:(?:' + c_wsp + ')+' + repetition + ')*'; | |
| alternation = concatenation + '(?:(?:' + c_wsp + ')*|(?:' + c_wsp + ')*' + concatenation + ')*'; | |
| group = '\\((?:' + c_wsp + ')*' + alternation + '(?:' + c_wsp + ')*\\)'; | |
| option = '\\[(?:' + c_wsp + ')*' + alternation + '(?:' + c_wsp + ')*\\]'; | |
| elements = alternation + '(?:' + c_wsp + ')*'; | |
| rule = rulename + defined_as + elements + c_nl; // ; continues if next line starts | |
| // ; with white space | |
| rulelist = '(?:' + rule + '|' + '(?:' + c_wsp + ')*' + c_nl + ')+'; | |
| char_val = DQUOTE + '[\u0020\u0021\u0023-\u007E]*' + DQUOTE; // ; quoted string of SP and VCHAR | |
| // ; without DQUOTE | |
| num_val = '%(?:' + bin_val + '|' +dec_val + '|' +hex_val + ')'; | |
| bin_val = 'b' + BIT + '+(?:(?:\\.' + BIT + '+)+|-' + BIT + '+)?'; // ; series of concatenated bit values | |
| // ; or single ONEOF range | |
| dec_val = 'd' + DIGIT + '+(?:(?:\\.' + DIGIT + '+)+|-' + DIGIT + '+)?'; | |
| hex_val = 'x' + HEXDIG + '+(?:(?:\\.' + HEXDIG + '+)+|-' + HEXDIG + '+)?'; | |
| prose_val = '<[\u0020-\u003D\u003F-\u007E]*>'; // ; bracketed string of SP and VCHAR | |
| // ; without angles | |
| // ; prose description, to be used as | |
| // ; last resort | |
| return this; | |
| } | |
| function ABNF () { | |
| if (!(this instanceof ABNF)) { | |
| return new ABNF; | |
| } | |
| return this; | |
| } | |
| (function () { | |
| this.coreRules = new ABNFCoreRules; | |
| this.syntax = new ABNFSyntax; | |
| this.toRegExpStringLiteral = function (abnfString) { | |
| var result; | |
| return result; | |
| }; | |
| }).call(ABNF.prototype); | |
| return ABNF; | |
| })(); |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment