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							176 lines
						
					
					
						
							6.2 KiB
						
					
					
				
			
		
		
	
	
							176 lines
						
					
					
						
							6.2 KiB
						
					
					
				(function (global, factory) {
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    typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports) :
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    typeof define === 'function' && define.amd ? define(['exports'], factory) :
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    (global = typeof globalThis !== 'undefined' ? globalThis : global || self, factory(global.sourcemapCodec = {}));
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})(this, (function (exports) { 'use strict';
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    const comma = ','.charCodeAt(0);
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    const semicolon = ';'.charCodeAt(0);
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    const chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/';
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    const intToChar = new Uint8Array(64); // 64 possible chars.
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    const charToInt = new Uint8Array(128); // z is 122 in ASCII
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    for (let i = 0; i < chars.length; i++) {
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        const c = chars.charCodeAt(i);
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        intToChar[i] = c;
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        charToInt[c] = i;
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    }
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    // Provide a fallback for older environments.
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    const td = typeof TextDecoder !== 'undefined'
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        ? /* #__PURE__ */ new TextDecoder()
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        : typeof Buffer !== 'undefined'
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            ? {
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                decode(buf) {
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                    const out = Buffer.from(buf.buffer, buf.byteOffset, buf.byteLength);
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                    return out.toString();
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                },
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            }
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            : {
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                decode(buf) {
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                    let out = '';
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                    for (let i = 0; i < buf.length; i++) {
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                        out += String.fromCharCode(buf[i]);
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                    }
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                    return out;
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                },
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            };
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    function decode(mappings) {
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        const state = new Int32Array(5);
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        const decoded = [];
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        let index = 0;
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        do {
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            const semi = indexOf(mappings, index);
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            const line = [];
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            let sorted = true;
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            let lastCol = 0;
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            state[0] = 0;
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            for (let i = index; i < semi; i++) {
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                let seg;
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                i = decodeInteger(mappings, i, state, 0); // genColumn
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                const col = state[0];
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                if (col < lastCol)
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                    sorted = false;
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                lastCol = col;
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                if (hasMoreVlq(mappings, i, semi)) {
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                    i = decodeInteger(mappings, i, state, 1); // sourcesIndex
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                    i = decodeInteger(mappings, i, state, 2); // sourceLine
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                    i = decodeInteger(mappings, i, state, 3); // sourceColumn
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                    if (hasMoreVlq(mappings, i, semi)) {
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                        i = decodeInteger(mappings, i, state, 4); // namesIndex
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                        seg = [col, state[1], state[2], state[3], state[4]];
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                    }
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                    else {
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                        seg = [col, state[1], state[2], state[3]];
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                    }
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                }
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                else {
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                    seg = [col];
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                }
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                line.push(seg);
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            }
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            if (!sorted)
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                sort(line);
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            decoded.push(line);
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            index = semi + 1;
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        } while (index <= mappings.length);
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        return decoded;
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    }
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    function indexOf(mappings, index) {
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        const idx = mappings.indexOf(';', index);
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        return idx === -1 ? mappings.length : idx;
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    }
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    function decodeInteger(mappings, pos, state, j) {
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        let value = 0;
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        let shift = 0;
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        let integer = 0;
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        do {
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            const c = mappings.charCodeAt(pos++);
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            integer = charToInt[c];
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            value |= (integer & 31) << shift;
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            shift += 5;
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        } while (integer & 32);
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        const shouldNegate = value & 1;
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        value >>>= 1;
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        if (shouldNegate) {
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            value = -0x80000000 | -value;
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        }
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        state[j] += value;
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        return pos;
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    }
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    function hasMoreVlq(mappings, i, length) {
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        if (i >= length)
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            return false;
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        return mappings.charCodeAt(i) !== comma;
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    }
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    function sort(line) {
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        line.sort(sortComparator);
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    }
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    function sortComparator(a, b) {
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        return a[0] - b[0];
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    }
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    function encode(decoded) {
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        const state = new Int32Array(5);
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        const bufLength = 1024 * 16;
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        const subLength = bufLength - 36;
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        const buf = new Uint8Array(bufLength);
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        const sub = buf.subarray(0, subLength);
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        let pos = 0;
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        let out = '';
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        for (let i = 0; i < decoded.length; i++) {
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            const line = decoded[i];
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            if (i > 0) {
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                if (pos === bufLength) {
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                    out += td.decode(buf);
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                    pos = 0;
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                }
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                buf[pos++] = semicolon;
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            }
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            if (line.length === 0)
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                continue;
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            state[0] = 0;
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            for (let j = 0; j < line.length; j++) {
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                const segment = line[j];
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                // We can push up to 5 ints, each int can take at most 7 chars, and we
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                // may push a comma.
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                if (pos > subLength) {
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                    out += td.decode(sub);
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                    buf.copyWithin(0, subLength, pos);
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                    pos -= subLength;
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                }
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                if (j > 0)
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                    buf[pos++] = comma;
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                pos = encodeInteger(buf, pos, state, segment, 0); // genColumn
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                if (segment.length === 1)
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                    continue;
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                pos = encodeInteger(buf, pos, state, segment, 1); // sourcesIndex
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                pos = encodeInteger(buf, pos, state, segment, 2); // sourceLine
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                pos = encodeInteger(buf, pos, state, segment, 3); // sourceColumn
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                if (segment.length === 4)
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                    continue;
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                pos = encodeInteger(buf, pos, state, segment, 4); // namesIndex
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            }
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        }
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        return out + td.decode(buf.subarray(0, pos));
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    }
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    function encodeInteger(buf, pos, state, segment, j) {
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        const next = segment[j];
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        let num = next - state[j];
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        state[j] = next;
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        num = num < 0 ? (-num << 1) | 1 : num << 1;
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        do {
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            let clamped = num & 0b011111;
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            num >>>= 5;
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            if (num > 0)
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                clamped |= 0b100000;
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            buf[pos++] = intToChar[clamped];
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        } while (num > 0);
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        return pos;
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    }
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    exports.decode = decode;
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    exports.encode = encode;
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    Object.defineProperty(exports, '__esModule', { value: true });
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}));
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//# sourceMappingURL=sourcemap-codec.umd.js.map
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