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					136 lines
				
				4.6 KiB
			
		
		
			
		
	
	
					136 lines
				
				4.6 KiB
			| 
											3 years ago
										 | (function (global, factory) { | ||
|  | 	typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports) : | ||
|  | 	typeof define === 'function' && define.amd ? define(['exports'], factory) : | ||
|  | 	(global = global || self, factory(global.sourcemapCodec = {})); | ||
|  | }(this, function (exports) { 'use strict'; | ||
|  | 
 | ||
|  | 	var charToInteger = {}; | ||
|  | 	var chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/='; | ||
|  | 	for (var i = 0; i < chars.length; i++) { | ||
|  | 	    charToInteger[chars.charCodeAt(i)] = i; | ||
|  | 	} | ||
|  | 	function decode(mappings) { | ||
|  | 	    var decoded = []; | ||
|  | 	    var line = []; | ||
|  | 	    var segment = [ | ||
|  | 	        0, | ||
|  | 	        0, | ||
|  | 	        0, | ||
|  | 	        0, | ||
|  | 	        0, | ||
|  | 	    ]; | ||
|  | 	    var j = 0; | ||
|  | 	    for (var i = 0, shift = 0, value = 0; i < mappings.length; i++) { | ||
|  | 	        var c = mappings.charCodeAt(i); | ||
|  | 	        if (c === 44) { // ","
 | ||
|  | 	            segmentify(line, segment, j); | ||
|  | 	            j = 0; | ||
|  | 	        } | ||
|  | 	        else if (c === 59) { // ";"
 | ||
|  | 	            segmentify(line, segment, j); | ||
|  | 	            j = 0; | ||
|  | 	            decoded.push(line); | ||
|  | 	            line = []; | ||
|  | 	            segment[0] = 0; | ||
|  | 	        } | ||
|  | 	        else { | ||
|  | 	            var integer = charToInteger[c]; | ||
|  | 	            if (integer === undefined) { | ||
|  | 	                throw new Error('Invalid character (' + String.fromCharCode(c) + ')'); | ||
|  | 	            } | ||
|  | 	            var hasContinuationBit = integer & 32; | ||
|  | 	            integer &= 31; | ||
|  | 	            value += integer << shift; | ||
|  | 	            if (hasContinuationBit) { | ||
|  | 	                shift += 5; | ||
|  | 	            } | ||
|  | 	            else { | ||
|  | 	                var shouldNegate = value & 1; | ||
|  | 	                value >>>= 1; | ||
|  | 	                if (shouldNegate) { | ||
|  | 	                    value = value === 0 ? -0x80000000 : -value; | ||
|  | 	                } | ||
|  | 	                segment[j] += value; | ||
|  | 	                j++; | ||
|  | 	                value = shift = 0; // reset
 | ||
|  | 	            } | ||
|  | 	        } | ||
|  | 	    } | ||
|  | 	    segmentify(line, segment, j); | ||
|  | 	    decoded.push(line); | ||
|  | 	    return decoded; | ||
|  | 	} | ||
|  | 	function segmentify(line, segment, j) { | ||
|  | 	    // This looks ugly, but we're creating specialized arrays with a specific
 | ||
|  | 	    // length. This is much faster than creating a new array (which v8 expands to
 | ||
|  | 	    // a capacity of 17 after pushing the first item), or slicing out a subarray
 | ||
|  | 	    // (which is slow). Length 4 is assumed to be the most frequent, followed by
 | ||
|  | 	    // length 5 (since not everything will have an associated name), followed by
 | ||
|  | 	    // length 1 (it's probably rare for a source substring to not have an
 | ||
|  | 	    // associated segment data).
 | ||
|  | 	    if (j === 4) | ||
|  | 	        line.push([segment[0], segment[1], segment[2], segment[3]]); | ||
|  | 	    else if (j === 5) | ||
|  | 	        line.push([segment[0], segment[1], segment[2], segment[3], segment[4]]); | ||
|  | 	    else if (j === 1) | ||
|  | 	        line.push([segment[0]]); | ||
|  | 	} | ||
|  | 	function encode(decoded) { | ||
|  | 	    var sourceFileIndex = 0; // second field
 | ||
|  | 	    var sourceCodeLine = 0; // third field
 | ||
|  | 	    var sourceCodeColumn = 0; // fourth field
 | ||
|  | 	    var nameIndex = 0; // fifth field
 | ||
|  | 	    var mappings = ''; | ||
|  | 	    for (var i = 0; i < decoded.length; i++) { | ||
|  | 	        var line = decoded[i]; | ||
|  | 	        if (i > 0) | ||
|  | 	            mappings += ';'; | ||
|  | 	        if (line.length === 0) | ||
|  | 	            continue; | ||
|  | 	        var generatedCodeColumn = 0; // first field
 | ||
|  | 	        var lineMappings = []; | ||
|  | 	        for (var _i = 0, line_1 = line; _i < line_1.length; _i++) { | ||
|  | 	            var segment = line_1[_i]; | ||
|  | 	            var segmentMappings = encodeInteger(segment[0] - generatedCodeColumn); | ||
|  | 	            generatedCodeColumn = segment[0]; | ||
|  | 	            if (segment.length > 1) { | ||
|  | 	                segmentMappings += | ||
|  | 	                    encodeInteger(segment[1] - sourceFileIndex) + | ||
|  | 	                        encodeInteger(segment[2] - sourceCodeLine) + | ||
|  | 	                        encodeInteger(segment[3] - sourceCodeColumn); | ||
|  | 	                sourceFileIndex = segment[1]; | ||
|  | 	                sourceCodeLine = segment[2]; | ||
|  | 	                sourceCodeColumn = segment[3]; | ||
|  | 	            } | ||
|  | 	            if (segment.length === 5) { | ||
|  | 	                segmentMappings += encodeInteger(segment[4] - nameIndex); | ||
|  | 	                nameIndex = segment[4]; | ||
|  | 	            } | ||
|  | 	            lineMappings.push(segmentMappings); | ||
|  | 	        } | ||
|  | 	        mappings += lineMappings.join(','); | ||
|  | 	    } | ||
|  | 	    return mappings; | ||
|  | 	} | ||
|  | 	function encodeInteger(num) { | ||
|  | 	    var result = ''; | ||
|  | 	    num = num < 0 ? (-num << 1) | 1 : num << 1; | ||
|  | 	    do { | ||
|  | 	        var clamped = num & 31; | ||
|  | 	        num >>>= 5; | ||
|  | 	        if (num > 0) { | ||
|  | 	            clamped |= 32; | ||
|  | 	        } | ||
|  | 	        result += chars[clamped]; | ||
|  | 	    } while (num > 0); | ||
|  | 	    return result; | ||
|  | 	} | ||
|  | 
 | ||
|  | 	exports.decode = decode; | ||
|  | 	exports.encode = encode; | ||
|  | 
 | ||
|  | 	Object.defineProperty(exports, '__esModule', { value: true }); | ||
|  | 
 | ||
|  | })); | ||
|  | //# sourceMappingURL=sourcemap-codec.umd.js.map
 |