Created
August 15, 2012 19:28
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Javascript CSV Parser generated by PEG.js
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| { | |
| var separator = ','; | |
| } | |
| start | |
| = comma | |
| comma | |
| = & { return separator = ','; } sv:sv { return sv; } | |
| tab | |
| = & { return separator = '\t'; } sv:sv { return sv; } | |
| sv | |
| = [\n\r]* first:line rest:([\n\r]+ data:line { return data; })* [\n\r]* { rest.unshift(first); return rest; } | |
| line | |
| = first:field rest:(char:. & { return char == separator; } text:field { return text; })* | |
| & { return !!first || rest.length; } | |
| { rest.unshift(first); return rest; } | |
| field | |
| = '"' text:char* '"' { return text.join(''); } | |
| / text:(char:[^\n\r] & { return char != separator; } { return char; })* | |
| { return text.join(''); } | |
| char | |
| = '"' '"' { return '"'; } | |
| / [^"] |
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Learn more about bidirectional Unicode characters
| csvParser = (function(){ | |
| /* | |
| * Generated by PEG.js 0.7.0. | |
| * | |
| * http://pegjs.majda.cz/ | |
| */ | |
| function quote(s) { | |
| /* | |
| * ECMA-262, 5th ed., 7.8.4: All characters may appear literally in a | |
| * string literal except for the closing quote character, backslash, | |
| * carriage return, line separator, paragraph separator, and line feed. | |
| * Any character may appear in the form of an escape sequence. | |
| * | |
| * For portability, we also escape escape all control and non-ASCII | |
| * characters. Note that "\0" and "\v" escape sequences are not used | |
| * because JSHint does not like the first and IE the second. | |
| */ | |
| return '"' + s | |
| .replace(/\\/g, '\\\\') // backslash | |
| .replace(/"/g, '\\"') // closing quote character | |
| .replace(/\x08/g, '\\b') // backspace | |
| .replace(/\t/g, '\\t') // horizontal tab | |
| .replace(/\n/g, '\\n') // line feed | |
| .replace(/\f/g, '\\f') // form feed | |
| .replace(/\r/g, '\\r') // carriage return | |
| .replace(/[\x00-\x07\x0B\x0E-\x1F\x80-\uFFFF]/g, escape) | |
| + '"'; | |
| } | |
| var result = { | |
| /* | |
| * Parses the input with a generated parser. If the parsing is successfull, | |
| * returns a value explicitly or implicitly specified by the grammar from | |
| * which the parser was generated (see |PEG.buildParser|). If the parsing is | |
| * unsuccessful, throws |PEG.parser.SyntaxError| describing the error. | |
| */ | |
| parse: function(input, startRule) { | |
| var parseFunctions = { | |
| "comma": parse_comma, | |
| "tab": parse_tab, | |
| "sv": parse_sv, | |
| "line": parse_line, | |
| "field": parse_field, | |
| "char": parse_char | |
| }; | |
| if (startRule !== undefined) { | |
| if (parseFunctions[startRule] === undefined) { | |
| throw new Error("Invalid rule name: " + quote(startRule) + "."); | |
| } | |
| } else { | |
| startRule = "comma"; | |
| } | |
| var pos = 0; | |
| var reportFailures = 0; | |
| var rightmostFailuresPos = 0; | |
| var rightmostFailuresExpected = []; | |
| function padLeft(input, padding, length) { | |
| var result = input; | |
| var padLength = length - input.length; | |
| for (var i = 0; i < padLength; i++) { | |
| result = padding + result; | |
| } | |
| return result; | |
| } | |
| function escape(ch) { | |
| var charCode = ch.charCodeAt(0); | |
| var escapeChar; | |
| var length; | |
| if (charCode <= 0xFF) { | |
| escapeChar = 'x'; | |
| length = 2; | |
| } else { | |
| escapeChar = 'u'; | |
| length = 4; | |
| } | |
| return '\\' + escapeChar + padLeft(charCode.toString(16).toUpperCase(), '0', length); | |
| } | |
| function matchFailed(failure) { | |
| if (pos < rightmostFailuresPos) { | |
| return; | |
| } | |
| if (pos > rightmostFailuresPos) { | |
| rightmostFailuresPos = pos; | |
| rightmostFailuresExpected = []; | |
| } | |
| rightmostFailuresExpected.push(failure); | |
| } | |
| function parse_comma() { | |
| var result0, result1; | |
| var pos0, pos1; | |
| pos0 = pos; | |
| pos1 = pos; | |
| result0 = (function(offset) { return separator = ','; })(pos) ? "" : null; | |
| if (result0 !== null) { | |
| result1 = parse_sv(); | |
| if (result1 !== null) { | |
| result0 = [result0, result1]; | |
| } else { | |
| result0 = null; | |
| pos = pos1; | |
| } | |
| } else { | |
| result0 = null; | |
| pos = pos1; | |
| } | |
| if (result0 !== null) { | |
| result0 = (function(offset, sv) { return sv; })(pos0, result0[1]); | |
| } | |
| if (result0 === null) { | |
| pos = pos0; | |
| } | |
| return result0; | |
| } | |
| function parse_tab() { | |
| var result0, result1; | |
| var pos0, pos1; | |
| pos0 = pos; | |
| pos1 = pos; | |
| result0 = (function(offset) { return separator = '\t'; })(pos) ? "" : null; | |
| if (result0 !== null) { | |
| result1 = parse_sv(); | |
| if (result1 !== null) { | |
| result0 = [result0, result1]; | |
| } else { | |
| result0 = null; | |
| pos = pos1; | |
| } | |
| } else { | |
| result0 = null; | |
| pos = pos1; | |
| } | |
| if (result0 !== null) { | |
| result0 = (function(offset, sv) { return sv; })(pos0, result0[1]); | |
| } | |
| if (result0 === null) { | |
| pos = pos0; | |
| } | |
| return result0; | |
| } | |
| function parse_sv() { | |
| var result0, result1, result2, result3, result4; | |
| var pos0, pos1, pos2, pos3; | |
| pos0 = pos; | |
| pos1 = pos; | |
| result0 = []; | |
| if (/^[\n\r]/.test(input.charAt(pos))) { | |
| result1 = input.charAt(pos); | |
| pos++; | |
| } else { | |
| result1 = null; | |
| if (reportFailures === 0) { | |
| matchFailed("[\\n\\r]"); | |
| } | |
| } | |
| while (result1 !== null) { | |
| result0.push(result1); | |
| if (/^[\n\r]/.test(input.charAt(pos))) { | |
| result1 = input.charAt(pos); | |
| pos++; | |
| } else { | |
| result1 = null; | |
| if (reportFailures === 0) { | |
| matchFailed("[\\n\\r]"); | |
| } | |
| } | |
| } | |
| if (result0 !== null) { | |
| result1 = parse_line(); | |
| if (result1 !== null) { | |
| result2 = []; | |
| pos2 = pos; | |
| pos3 = pos; | |
| if (/^[\n\r]/.test(input.charAt(pos))) { | |
| result4 = input.charAt(pos); | |
| pos++; | |
| } else { | |
| result4 = null; | |
| if (reportFailures === 0) { | |
| matchFailed("[\\n\\r]"); | |
| } | |
| } | |
| if (result4 !== null) { | |
| result3 = []; | |
| while (result4 !== null) { | |
| result3.push(result4); | |
| if (/^[\n\r]/.test(input.charAt(pos))) { | |
| result4 = input.charAt(pos); | |
| pos++; | |
| } else { | |
| result4 = null; | |
| if (reportFailures === 0) { | |
| matchFailed("[\\n\\r]"); | |
| } | |
| } | |
| } | |
| } else { | |
| result3 = null; | |
| } | |
| if (result3 !== null) { | |
| result4 = parse_line(); | |
| if (result4 !== null) { | |
| result3 = [result3, result4]; | |
| } else { | |
| result3 = null; | |
| pos = pos3; | |
| } | |
| } else { | |
| result3 = null; | |
| pos = pos3; | |
| } | |
| if (result3 !== null) { | |
| result3 = (function(offset, data) { return data; })(pos2, result3[1]); | |
| } | |
| if (result3 === null) { | |
| pos = pos2; | |
| } | |
| while (result3 !== null) { | |
| result2.push(result3); | |
| pos2 = pos; | |
| pos3 = pos; | |
| if (/^[\n\r]/.test(input.charAt(pos))) { | |
| result4 = input.charAt(pos); | |
| pos++; | |
| } else { | |
| result4 = null; | |
| if (reportFailures === 0) { | |
| matchFailed("[\\n\\r]"); | |
| } | |
| } | |
| if (result4 !== null) { | |
| result3 = []; | |
| while (result4 !== null) { | |
| result3.push(result4); | |
| if (/^[\n\r]/.test(input.charAt(pos))) { | |
| result4 = input.charAt(pos); | |
| pos++; | |
| } else { | |
| result4 = null; | |
| if (reportFailures === 0) { | |
| matchFailed("[\\n\\r]"); | |
| } | |
| } | |
| } | |
| } else { | |
| result3 = null; | |
| } | |
| if (result3 !== null) { | |
| result4 = parse_line(); | |
| if (result4 !== null) { | |
| result3 = [result3, result4]; | |
| } else { | |
| result3 = null; | |
| pos = pos3; | |
| } | |
| } else { | |
| result3 = null; | |
| pos = pos3; | |
| } | |
| if (result3 !== null) { | |
| result3 = (function(offset, data) { return data; })(pos2, result3[1]); | |
| } | |
| if (result3 === null) { | |
| pos = pos2; | |
| } | |
| } | |
| if (result2 !== null) { | |
| result3 = []; | |
| if (/^[\n\r]/.test(input.charAt(pos))) { | |
| result4 = input.charAt(pos); | |
| pos++; | |
| } else { | |
| result4 = null; | |
| if (reportFailures === 0) { | |
| matchFailed("[\\n\\r]"); | |
| } | |
| } | |
| while (result4 !== null) { | |
| result3.push(result4); | |
| if (/^[\n\r]/.test(input.charAt(pos))) { | |
| result4 = input.charAt(pos); | |
| pos++; | |
| } else { | |
| result4 = null; | |
| if (reportFailures === 0) { | |
| matchFailed("[\\n\\r]"); | |
| } | |
| } | |
| } | |
| if (result3 !== null) { | |
| result0 = [result0, result1, result2, result3]; | |
| } else { | |
| result0 = null; | |
| pos = pos1; | |
| } | |
| } else { | |
| result0 = null; | |
| pos = pos1; | |
| } | |
| } else { | |
| result0 = null; | |
| pos = pos1; | |
| } | |
| } else { | |
| result0 = null; | |
| pos = pos1; | |
| } | |
| if (result0 !== null) { | |
| result0 = (function(offset, first, rest) { rest.unshift(first); return rest; })(pos0, result0[1], result0[2]); | |
| } | |
| if (result0 === null) { | |
| pos = pos0; | |
| } | |
| return result0; | |
| } | |
| function parse_line() { | |
| var result0, result1, result2, result3, result4; | |
| var pos0, pos1, pos2, pos3; | |
| pos0 = pos; | |
| pos1 = pos; | |
| result0 = parse_field(); | |
| if (result0 !== null) { | |
| result1 = []; | |
| pos2 = pos; | |
| pos3 = pos; | |
| if (input.length > pos) { | |
| result2 = input.charAt(pos); | |
| pos++; | |
| } else { | |
| result2 = null; | |
| if (reportFailures === 0) { | |
| matchFailed("any character"); | |
| } | |
| } | |
| if (result2 !== null) { | |
| result3 = (function(offset, char) { return char == separator; })(pos, result2) ? "" : null; | |
| if (result3 !== null) { | |
| result4 = parse_field(); | |
| if (result4 !== null) { | |
| result2 = [result2, result3, result4]; | |
| } else { | |
| result2 = null; | |
| pos = pos3; | |
| } | |
| } else { | |
| result2 = null; | |
| pos = pos3; | |
| } | |
| } else { | |
| result2 = null; | |
| pos = pos3; | |
| } | |
| if (result2 !== null) { | |
| result2 = (function(offset, char, text) { return text; })(pos2, result2[0], result2[2]); | |
| } | |
| if (result2 === null) { | |
| pos = pos2; | |
| } | |
| while (result2 !== null) { | |
| result1.push(result2); | |
| pos2 = pos; | |
| pos3 = pos; | |
| if (input.length > pos) { | |
| result2 = input.charAt(pos); | |
| pos++; | |
| } else { | |
| result2 = null; | |
| if (reportFailures === 0) { | |
| matchFailed("any character"); | |
| } | |
| } | |
| if (result2 !== null) { | |
| result3 = (function(offset, char) { return char == separator; })(pos, result2) ? "" : null; | |
| if (result3 !== null) { | |
| result4 = parse_field(); | |
| if (result4 !== null) { | |
| result2 = [result2, result3, result4]; | |
| } else { | |
| result2 = null; | |
| pos = pos3; | |
| } | |
| } else { | |
| result2 = null; | |
| pos = pos3; | |
| } | |
| } else { | |
| result2 = null; | |
| pos = pos3; | |
| } | |
| if (result2 !== null) { | |
| result2 = (function(offset, char, text) { return text; })(pos2, result2[0], result2[2]); | |
| } | |
| if (result2 === null) { | |
| pos = pos2; | |
| } | |
| } | |
| if (result1 !== null) { | |
| result2 = (function(offset, first, rest) { return !!first || rest.length; })(pos, result0, result1) ? "" : null; | |
| if (result2 !== null) { | |
| result0 = [result0, result1, result2]; | |
| } else { | |
| result0 = null; | |
| pos = pos1; | |
| } | |
| } else { | |
| result0 = null; | |
| pos = pos1; | |
| } | |
| } else { | |
| result0 = null; | |
| pos = pos1; | |
| } | |
| if (result0 !== null) { | |
| result0 = (function(offset, first, rest) { rest.unshift(first); return rest; })(pos0, result0[0], result0[1]); | |
| } | |
| if (result0 === null) { | |
| pos = pos0; | |
| } | |
| return result0; | |
| } | |
| function parse_field() { | |
| var result0, result1, result2; | |
| var pos0, pos1, pos2; | |
| pos0 = pos; | |
| pos1 = pos; | |
| if (input.charCodeAt(pos) === 34) { | |
| result0 = "\""; | |
| pos++; | |
| } else { | |
| result0 = null; | |
| if (reportFailures === 0) { | |
| matchFailed("\"\\\"\""); | |
| } | |
| } | |
| if (result0 !== null) { | |
| result1 = []; | |
| result2 = parse_char(); | |
| while (result2 !== null) { | |
| result1.push(result2); | |
| result2 = parse_char(); | |
| } | |
| if (result1 !== null) { | |
| if (input.charCodeAt(pos) === 34) { | |
| result2 = "\""; | |
| pos++; | |
| } else { | |
| result2 = null; | |
| if (reportFailures === 0) { | |
| matchFailed("\"\\\"\""); | |
| } | |
| } | |
| if (result2 !== null) { | |
| result0 = [result0, result1, result2]; | |
| } else { | |
| result0 = null; | |
| pos = pos1; | |
| } | |
| } else { | |
| result0 = null; | |
| pos = pos1; | |
| } | |
| } else { | |
| result0 = null; | |
| pos = pos1; | |
| } | |
| if (result0 !== null) { | |
| result0 = (function(offset, text) { return text.join(''); })(pos0, result0[1]); | |
| } | |
| if (result0 === null) { | |
| pos = pos0; | |
| } | |
| if (result0 === null) { | |
| pos0 = pos; | |
| result0 = []; | |
| pos1 = pos; | |
| pos2 = pos; | |
| if (/^[^\n\r]/.test(input.charAt(pos))) { | |
| result1 = input.charAt(pos); | |
| pos++; | |
| } else { | |
| result1 = null; | |
| if (reportFailures === 0) { | |
| matchFailed("[^\\n\\r]"); | |
| } | |
| } | |
| if (result1 !== null) { | |
| result2 = (function(offset, char) { return char != separator; })(pos, result1) ? "" : null; | |
| if (result2 !== null) { | |
| result1 = [result1, result2]; | |
| } else { | |
| result1 = null; | |
| pos = pos2; | |
| } | |
| } else { | |
| result1 = null; | |
| pos = pos2; | |
| } | |
| if (result1 !== null) { | |
| result1 = (function(offset, char) { return char; })(pos1, result1[0]); | |
| } | |
| if (result1 === null) { | |
| pos = pos1; | |
| } | |
| while (result1 !== null) { | |
| result0.push(result1); | |
| pos1 = pos; | |
| pos2 = pos; | |
| if (/^[^\n\r]/.test(input.charAt(pos))) { | |
| result1 = input.charAt(pos); | |
| pos++; | |
| } else { | |
| result1 = null; | |
| if (reportFailures === 0) { | |
| matchFailed("[^\\n\\r]"); | |
| } | |
| } | |
| if (result1 !== null) { | |
| result2 = (function(offset, char) { return char != separator; })(pos, result1) ? "" : null; | |
| if (result2 !== null) { | |
| result1 = [result1, result2]; | |
| } else { | |
| result1 = null; | |
| pos = pos2; | |
| } | |
| } else { | |
| result1 = null; | |
| pos = pos2; | |
| } | |
| if (result1 !== null) { | |
| result1 = (function(offset, char) { return char; })(pos1, result1[0]); | |
| } | |
| if (result1 === null) { | |
| pos = pos1; | |
| } | |
| } | |
| if (result0 !== null) { | |
| result0 = (function(offset, text) { return text.join(''); })(pos0, result0); | |
| } | |
| if (result0 === null) { | |
| pos = pos0; | |
| } | |
| } | |
| return result0; | |
| } | |
| function parse_char() { | |
| var result0, result1; | |
| var pos0, pos1; | |
| pos0 = pos; | |
| pos1 = pos; | |
| if (input.charCodeAt(pos) === 34) { | |
| result0 = "\""; | |
| pos++; | |
| } else { | |
| result0 = null; | |
| if (reportFailures === 0) { | |
| matchFailed("\"\\\"\""); | |
| } | |
| } | |
| if (result0 !== null) { | |
| if (input.charCodeAt(pos) === 34) { | |
| result1 = "\""; | |
| pos++; | |
| } else { | |
| result1 = null; | |
| if (reportFailures === 0) { | |
| matchFailed("\"\\\"\""); | |
| } | |
| } | |
| if (result1 !== null) { | |
| result0 = [result0, result1]; | |
| } else { | |
| result0 = null; | |
| pos = pos1; | |
| } | |
| } else { | |
| result0 = null; | |
| pos = pos1; | |
| } | |
| if (result0 !== null) { | |
| result0 = (function(offset) { return '"'; })(pos0); | |
| } | |
| if (result0 === null) { | |
| pos = pos0; | |
| } | |
| if (result0 === null) { | |
| if (/^[^"]/.test(input.charAt(pos))) { | |
| result0 = input.charAt(pos); | |
| pos++; | |
| } else { | |
| result0 = null; | |
| if (reportFailures === 0) { | |
| matchFailed("[^\"]"); | |
| } | |
| } | |
| } | |
| return result0; | |
| } | |
| function cleanupExpected(expected) { | |
| expected.sort(); | |
| var lastExpected = null; | |
| var cleanExpected = []; | |
| for (var i = 0; i < expected.length; i++) { | |
| if (expected[i] !== lastExpected) { | |
| cleanExpected.push(expected[i]); | |
| lastExpected = expected[i]; | |
| } | |
| } | |
| return cleanExpected; | |
| } | |
| function computeErrorPosition() { | |
| /* | |
| * The first idea was to use |String.split| to break the input up to the | |
| * error position along newlines and derive the line and column from | |
| * there. However IE's |split| implementation is so broken that it was | |
| * enough to prevent it. | |
| */ | |
| var line = 1; | |
| var column = 1; | |
| var seenCR = false; | |
| for (var i = 0; i < Math.max(pos, rightmostFailuresPos); i++) { | |
| var ch = input.charAt(i); | |
| if (ch === "\n") { | |
| if (!seenCR) { line++; } | |
| column = 1; | |
| seenCR = false; | |
| } else if (ch === "\r" || ch === "\u2028" || ch === "\u2029") { | |
| line++; | |
| column = 1; | |
| seenCR = true; | |
| } else { | |
| column++; | |
| seenCR = false; | |
| } | |
| } | |
| return { line: line, column: column }; | |
| } | |
| var separator = ','; | |
| var result = parseFunctions[startRule](); | |
| /* | |
| * The parser is now in one of the following three states: | |
| * | |
| * 1. The parser successfully parsed the whole input. | |
| * | |
| * - |result !== null| | |
| * - |pos === input.length| | |
| * - |rightmostFailuresExpected| may or may not contain something | |
| * | |
| * 2. The parser successfully parsed only a part of the input. | |
| * | |
| * - |result !== null| | |
| * - |pos < input.length| | |
| * - |rightmostFailuresExpected| may or may not contain something | |
| * | |
| * 3. The parser did not successfully parse any part of the input. | |
| * | |
| * - |result === null| | |
| * - |pos === 0| | |
| * - |rightmostFailuresExpected| contains at least one failure | |
| * | |
| * All code following this comment (including called functions) must | |
| * handle these states. | |
| */ | |
| if (result === null || pos !== input.length) { | |
| var offset = Math.max(pos, rightmostFailuresPos); | |
| var found = offset < input.length ? input.charAt(offset) : null; | |
| var errorPosition = computeErrorPosition(); | |
| throw new this.SyntaxError( | |
| cleanupExpected(rightmostFailuresExpected), | |
| found, | |
| offset, | |
| errorPosition.line, | |
| errorPosition.column | |
| ); | |
| } | |
| return result; | |
| }, | |
| /* Returns the parser source code. */ | |
| toSource: function() { return this._source; } | |
| }; | |
| /* Thrown when a parser encounters a syntax error. */ | |
| result.SyntaxError = function(expected, found, offset, line, column) { | |
| function buildMessage(expected, found) { | |
| var expectedHumanized, foundHumanized; | |
| switch (expected.length) { | |
| case 0: | |
| expectedHumanized = "end of input"; | |
| break; | |
| case 1: | |
| expectedHumanized = expected[0]; | |
| break; | |
| default: | |
| expectedHumanized = expected.slice(0, expected.length - 1).join(", ") | |
| + " or " | |
| + expected[expected.length - 1]; | |
| } | |
| foundHumanized = found ? quote(found) : "end of input"; | |
| return "Expected " + expectedHumanized + " but " + foundHumanized + " found."; | |
| } | |
| this.name = "SyntaxError"; | |
| this.expected = expected; | |
| this.found = found; | |
| this.message = buildMessage(expected, found); | |
| this.offset = offset; | |
| this.line = line; | |
| this.column = column; | |
| }; | |
| result.SyntaxError.prototype = Error.prototype; | |
| return result; | |
| })(); |
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""
fails, which seems strange?