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