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							165 lines
						
					
					
						
							5.2 KiB
						
					
					
				
			
		
		
	
	
							165 lines
						
					
					
						
							5.2 KiB
						
					
					
				| 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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| 
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| export { decode, encode };
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| //# sourceMappingURL=sourcemap-codec.mjs.map
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