sourav-das/stem-separator

1(function (global, factory) {2  if (typeof exports === 'object' && typeof module !== 'undefined') {3    factory(module);4    module.exports = def(module);5  } else if (typeof define === 'function' && define.amd) {6    define(['module'], function(mod) {7      factory.apply(this, arguments);8      mod.exports = def(mod);9    });10  } else {11    const mod = { exports: {} };12    factory(mod);13    global = typeof globalThis !== 'undefined' ? globalThis : global || self;14    global.sourcemapCodec = def(mod);15  }16  function def(m) { return 'default' in m.exports ? m.exports.default : m.exports; }17})(this, (function (module) {18"use strict";19var __defProp = Object.defineProperty;20var __getOwnPropDesc = Object.getOwnPropertyDescriptor;21var __getOwnPropNames = Object.getOwnPropertyNames;22var __hasOwnProp = Object.prototype.hasOwnProperty;23var __export = (target, all) => {24  for (var name in all)25    __defProp(target, name, { get: all[name], enumerable: true });26};27var __copyProps = (to, from, except, desc) => {28  if (from && typeof from === "object" || typeof from === "function") {29    for (let key of __getOwnPropNames(from))30      if (!__hasOwnProp.call(to, key) && key !== except)31        __defProp(to, key, { get: () => from[key], enumerable: !(desc = __getOwnPropDesc(from, key)) || desc.enumerable });32  }33  return to;34};35var __toCommonJS = (mod) => __copyProps(__defProp({}, "__esModule", { value: true }), mod);36 37// src/sourcemap-codec.ts38var sourcemap_codec_exports = {};39__export(sourcemap_codec_exports, {40  decode: () => decode,41  decodeGeneratedRanges: () => decodeGeneratedRanges,42  decodeOriginalScopes: () => decodeOriginalScopes,43  encode: () => encode,44  encodeGeneratedRanges: () => encodeGeneratedRanges,45  encodeOriginalScopes: () => encodeOriginalScopes46});47module.exports = __toCommonJS(sourcemap_codec_exports);48 49// src/vlq.ts50var comma = ",".charCodeAt(0);51var semicolon = ";".charCodeAt(0);52var chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";53var intToChar = new Uint8Array(64);54var charToInt = new Uint8Array(128);55for (let i = 0; i < chars.length; i++) {56  const c = chars.charCodeAt(i);57  intToChar[i] = c;58  charToInt[c] = i;59}60function decodeInteger(reader, relative) {61  let value = 0;62  let shift = 0;63  let integer = 0;64  do {65    const c = reader.next();66    integer = charToInt[c];67    value |= (integer & 31) << shift;68    shift += 5;69  } while (integer & 32);70  const shouldNegate = value & 1;71  value >>>= 1;72  if (shouldNegate) {73    value = -2147483648 | -value;74  }75  return relative + value;76}77function encodeInteger(builder, num, relative) {78  let delta = num - relative;79  delta = delta < 0 ? -delta << 1 | 1 : delta << 1;80  do {81    let clamped = delta & 31;82    delta >>>= 5;83    if (delta > 0) clamped |= 32;84    builder.write(intToChar[clamped]);85  } while (delta > 0);86  return num;87}88function hasMoreVlq(reader, max) {89  if (reader.pos >= max) return false;90  return reader.peek() !== comma;91}92 93// src/strings.ts94var bufLength = 1024 * 16;95var td = typeof TextDecoder !== "undefined" ? /* @__PURE__ */ new TextDecoder() : typeof Buffer !== "undefined" ? {96  decode(buf) {97    const out = Buffer.from(buf.buffer, buf.byteOffset, buf.byteLength);98    return out.toString();99  }100} : {101  decode(buf) {102    let out = "";103    for (let i = 0; i < buf.length; i++) {104      out += String.fromCharCode(buf[i]);105    }106    return out;107  }108};109var StringWriter = class {110  constructor() {111    this.pos = 0;112    this.out = "";113    this.buffer = new Uint8Array(bufLength);114  }115  write(v) {116    const { buffer } = this;117    buffer[this.pos++] = v;118    if (this.pos === bufLength) {119      this.out += td.decode(buffer);120      this.pos = 0;121    }122  }123  flush() {124    const { buffer, out, pos } = this;125    return pos > 0 ? out + td.decode(buffer.subarray(0, pos)) : out;126  }127};128var StringReader = class {129  constructor(buffer) {130    this.pos = 0;131    this.buffer = buffer;132  }133  next() {134    return this.buffer.charCodeAt(this.pos++);135  }136  peek() {137    return this.buffer.charCodeAt(this.pos);138  }139  indexOf(char) {140    const { buffer, pos } = this;141    const idx = buffer.indexOf(char, pos);142    return idx === -1 ? buffer.length : idx;143  }144};145 146// src/scopes.ts147var EMPTY = [];148function decodeOriginalScopes(input) {149  const { length } = input;150  const reader = new StringReader(input);151  const scopes = [];152  const stack = [];153  let line = 0;154  for (; reader.pos < length; reader.pos++) {155    line = decodeInteger(reader, line);156    const column = decodeInteger(reader, 0);157    if (!hasMoreVlq(reader, length)) {158      const last = stack.pop();159      last[2] = line;160      last[3] = column;161      continue;162    }163    const kind = decodeInteger(reader, 0);164    const fields = decodeInteger(reader, 0);165    const hasName = fields & 1;166    const scope = hasName ? [line, column, 0, 0, kind, decodeInteger(reader, 0)] : [line, column, 0, 0, kind];167    let vars = EMPTY;168    if (hasMoreVlq(reader, length)) {169      vars = [];170      do {171        const varsIndex = decodeInteger(reader, 0);172        vars.push(varsIndex);173      } while (hasMoreVlq(reader, length));174    }175    scope.vars = vars;176    scopes.push(scope);177    stack.push(scope);178  }179  return scopes;180}181function encodeOriginalScopes(scopes) {182  const writer = new StringWriter();183  for (let i = 0; i < scopes.length; ) {184    i = _encodeOriginalScopes(scopes, i, writer, [0]);185  }186  return writer.flush();187}188function _encodeOriginalScopes(scopes, index, writer, state) {189  const scope = scopes[index];190  const { 0: startLine, 1: startColumn, 2: endLine, 3: endColumn, 4: kind, vars } = scope;191  if (index > 0) writer.write(comma);192  state[0] = encodeInteger(writer, startLine, state[0]);193  encodeInteger(writer, startColumn, 0);194  encodeInteger(writer, kind, 0);195  const fields = scope.length === 6 ? 1 : 0;196  encodeInteger(writer, fields, 0);197  if (scope.length === 6) encodeInteger(writer, scope[5], 0);198  for (const v of vars) {199    encodeInteger(writer, v, 0);200  }201  for (index++; index < scopes.length; ) {202    const next = scopes[index];203    const { 0: l, 1: c } = next;204    if (l > endLine || l === endLine && c >= endColumn) {205      break;206    }207    index = _encodeOriginalScopes(scopes, index, writer, state);208  }209  writer.write(comma);210  state[0] = encodeInteger(writer, endLine, state[0]);211  encodeInteger(writer, endColumn, 0);212  return index;213}214function decodeGeneratedRanges(input) {215  const { length } = input;216  const reader = new StringReader(input);217  const ranges = [];218  const stack = [];219  let genLine = 0;220  let definitionSourcesIndex = 0;221  let definitionScopeIndex = 0;222  let callsiteSourcesIndex = 0;223  let callsiteLine = 0;224  let callsiteColumn = 0;225  let bindingLine = 0;226  let bindingColumn = 0;227  do {228    const semi = reader.indexOf(";");229    let genColumn = 0;230    for (; reader.pos < semi; reader.pos++) {231      genColumn = decodeInteger(reader, genColumn);232      if (!hasMoreVlq(reader, semi)) {233        const last = stack.pop();234        last[2] = genLine;235        last[3] = genColumn;236        continue;237      }238      const fields = decodeInteger(reader, 0);239      const hasDefinition = fields & 1;240      const hasCallsite = fields & 2;241      const hasScope = fields & 4;242      let callsite = null;243      let bindings = EMPTY;244      let range;245      if (hasDefinition) {246        const defSourcesIndex = decodeInteger(reader, definitionSourcesIndex);247        definitionScopeIndex = decodeInteger(248          reader,249          definitionSourcesIndex === defSourcesIndex ? definitionScopeIndex : 0250        );251        definitionSourcesIndex = defSourcesIndex;252        range = [genLine, genColumn, 0, 0, defSourcesIndex, definitionScopeIndex];253      } else {254        range = [genLine, genColumn, 0, 0];255      }256      range.isScope = !!hasScope;257      if (hasCallsite) {258        const prevCsi = callsiteSourcesIndex;259        const prevLine = callsiteLine;260        callsiteSourcesIndex = decodeInteger(reader, callsiteSourcesIndex);261        const sameSource = prevCsi === callsiteSourcesIndex;262        callsiteLine = decodeInteger(reader, sameSource ? callsiteLine : 0);263        callsiteColumn = decodeInteger(264          reader,265          sameSource && prevLine === callsiteLine ? callsiteColumn : 0266        );267        callsite = [callsiteSourcesIndex, callsiteLine, callsiteColumn];268      }269      range.callsite = callsite;270      if (hasMoreVlq(reader, semi)) {271        bindings = [];272        do {273          bindingLine = genLine;274          bindingColumn = genColumn;275          const expressionsCount = decodeInteger(reader, 0);276          let expressionRanges;277          if (expressionsCount < -1) {278            expressionRanges = [[decodeInteger(reader, 0)]];279            for (let i = -1; i > expressionsCount; i--) {280              const prevBl = bindingLine;281              bindingLine = decodeInteger(reader, bindingLine);282              bindingColumn = decodeInteger(reader, bindingLine === prevBl ? bindingColumn : 0);283              const expression = decodeInteger(reader, 0);284              expressionRanges.push([expression, bindingLine, bindingColumn]);285            }286          } else {287            expressionRanges = [[expressionsCount]];288          }289          bindings.push(expressionRanges);290        } while (hasMoreVlq(reader, semi));291      }292      range.bindings = bindings;293      ranges.push(range);294      stack.push(range);295    }296    genLine++;297    reader.pos = semi + 1;298  } while (reader.pos < length);299  return ranges;300}301function encodeGeneratedRanges(ranges) {302  if (ranges.length === 0) return "";303  const writer = new StringWriter();304  for (let i = 0; i < ranges.length; ) {305    i = _encodeGeneratedRanges(ranges, i, writer, [0, 0, 0, 0, 0, 0, 0]);306  }307  return writer.flush();308}309function _encodeGeneratedRanges(ranges, index, writer, state) {310  const range = ranges[index];311  const {312    0: startLine,313    1: startColumn,314    2: endLine,315    3: endColumn,316    isScope,317    callsite,318    bindings319  } = range;320  if (state[0] < startLine) {321    catchupLine(writer, state[0], startLine);322    state[0] = startLine;323    state[1] = 0;324  } else if (index > 0) {325    writer.write(comma);326  }327  state[1] = encodeInteger(writer, range[1], state[1]);328  const fields = (range.length === 6 ? 1 : 0) | (callsite ? 2 : 0) | (isScope ? 4 : 0);329  encodeInteger(writer, fields, 0);330  if (range.length === 6) {331    const { 4: sourcesIndex, 5: scopesIndex } = range;332    if (sourcesIndex !== state[2]) {333      state[3] = 0;334    }335    state[2] = encodeInteger(writer, sourcesIndex, state[2]);336    state[3] = encodeInteger(writer, scopesIndex, state[3]);337  }338  if (callsite) {339    const { 0: sourcesIndex, 1: callLine, 2: callColumn } = range.callsite;340    if (sourcesIndex !== state[4]) {341      state[5] = 0;342      state[6] = 0;343    } else if (callLine !== state[5]) {344      state[6] = 0;345    }346    state[4] = encodeInteger(writer, sourcesIndex, state[4]);347    state[5] = encodeInteger(writer, callLine, state[5]);348    state[6] = encodeInteger(writer, callColumn, state[6]);349  }350  if (bindings) {351    for (const binding of bindings) {352      if (binding.length > 1) encodeInteger(writer, -binding.length, 0);353      const expression = binding[0][0];354      encodeInteger(writer, expression, 0);355      let bindingStartLine = startLine;356      let bindingStartColumn = startColumn;357      for (let i = 1; i < binding.length; i++) {358        const expRange = binding[i];359        bindingStartLine = encodeInteger(writer, expRange[1], bindingStartLine);360        bindingStartColumn = encodeInteger(writer, expRange[2], bindingStartColumn);361        encodeInteger(writer, expRange[0], 0);362      }363    }364  }365  for (index++; index < ranges.length; ) {366    const next = ranges[index];367    const { 0: l, 1: c } = next;368    if (l > endLine || l === endLine && c >= endColumn) {369      break;370    }371    index = _encodeGeneratedRanges(ranges, index, writer, state);372  }373  if (state[0] < endLine) {374    catchupLine(writer, state[0], endLine);375    state[0] = endLine;376    state[1] = 0;377  } else {378    writer.write(comma);379  }380  state[1] = encodeInteger(writer, endColumn, state[1]);381  return index;382}383function catchupLine(writer, lastLine, line) {384  do {385    writer.write(semicolon);386  } while (++lastLine < line);387}388 389// src/sourcemap-codec.ts390function decode(mappings) {391  const { length } = mappings;392  const reader = new StringReader(mappings);393  const decoded = [];394  let genColumn = 0;395  let sourcesIndex = 0;396  let sourceLine = 0;397  let sourceColumn = 0;398  let namesIndex = 0;399  do {400    const semi = reader.indexOf(";");401    const line = [];402    let sorted = true;403    let lastCol = 0;404    genColumn = 0;405    while (reader.pos < semi) {406      let seg;407      genColumn = decodeInteger(reader, genColumn);408      if (genColumn < lastCol) sorted = false;409      lastCol = genColumn;410      if (hasMoreVlq(reader, semi)) {411        sourcesIndex = decodeInteger(reader, sourcesIndex);412        sourceLine = decodeInteger(reader, sourceLine);413        sourceColumn = decodeInteger(reader, sourceColumn);414        if (hasMoreVlq(reader, semi)) {415          namesIndex = decodeInteger(reader, namesIndex);416          seg = [genColumn, sourcesIndex, sourceLine, sourceColumn, namesIndex];417        } else {418          seg = [genColumn, sourcesIndex, sourceLine, sourceColumn];419        }420      } else {421        seg = [genColumn];422      }423      line.push(seg);424      reader.pos++;425    }426    if (!sorted) sort(line);427    decoded.push(line);428    reader.pos = semi + 1;429  } while (reader.pos <= length);430  return decoded;431}432function sort(line) {433  line.sort(sortComparator);434}435function sortComparator(a, b) {436  return a[0] - b[0];437}438function encode(decoded) {439  const writer = new StringWriter();440  let sourcesIndex = 0;441  let sourceLine = 0;442  let sourceColumn = 0;443  let namesIndex = 0;444  for (let i = 0; i < decoded.length; i++) {445    const line = decoded[i];446    if (i > 0) writer.write(semicolon);447    if (line.length === 0) continue;448    let genColumn = 0;449    for (let j = 0; j < line.length; j++) {450      const segment = line[j];451      if (j > 0) writer.write(comma);452      genColumn = encodeInteger(writer, segment[0], genColumn);453      if (segment.length === 1) continue;454      sourcesIndex = encodeInteger(writer, segment[1], sourcesIndex);455      sourceLine = encodeInteger(writer, segment[2], sourceLine);456      sourceColumn = encodeInteger(writer, segment[3], sourceColumn);457      if (segment.length === 4) continue;458      namesIndex = encodeInteger(writer, segment[4], namesIndex);459    }460  }461  return writer.flush();462}463}));464//# sourceMappingURL=sourcemap-codec.umd.js.map465