sourav-das/stem-separator

1// src/vlq.ts2var comma = ",".charCodeAt(0);3var semicolon = ";".charCodeAt(0);4var chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";5var intToChar = new Uint8Array(64);6var charToInt = new Uint8Array(128);7for (let i = 0; i < chars.length; i++) {8  const c = chars.charCodeAt(i);9  intToChar[i] = c;10  charToInt[c] = i;11}12function decodeInteger(reader, relative) {13  let value = 0;14  let shift = 0;15  let integer = 0;16  do {17    const c = reader.next();18    integer = charToInt[c];19    value |= (integer & 31) << shift;20    shift += 5;21  } while (integer & 32);22  const shouldNegate = value & 1;23  value >>>= 1;24  if (shouldNegate) {25    value = -2147483648 | -value;26  }27  return relative + value;28}29function encodeInteger(builder, num, relative) {30  let delta = num - relative;31  delta = delta < 0 ? -delta << 1 | 1 : delta << 1;32  do {33    let clamped = delta & 31;34    delta >>>= 5;35    if (delta > 0) clamped |= 32;36    builder.write(intToChar[clamped]);37  } while (delta > 0);38  return num;39}40function hasMoreVlq(reader, max) {41  if (reader.pos >= max) return false;42  return reader.peek() !== comma;43}44 45// src/strings.ts46var bufLength = 1024 * 16;47var td = typeof TextDecoder !== "undefined" ? /* @__PURE__ */ new TextDecoder() : typeof Buffer !== "undefined" ? {48  decode(buf) {49    const out = Buffer.from(buf.buffer, buf.byteOffset, buf.byteLength);50    return out.toString();51  }52} : {53  decode(buf) {54    let out = "";55    for (let i = 0; i < buf.length; i++) {56      out += String.fromCharCode(buf[i]);57    }58    return out;59  }60};61var StringWriter = class {62  constructor() {63    this.pos = 0;64    this.out = "";65    this.buffer = new Uint8Array(bufLength);66  }67  write(v) {68    const { buffer } = this;69    buffer[this.pos++] = v;70    if (this.pos === bufLength) {71      this.out += td.decode(buffer);72      this.pos = 0;73    }74  }75  flush() {76    const { buffer, out, pos } = this;77    return pos > 0 ? out + td.decode(buffer.subarray(0, pos)) : out;78  }79};80var StringReader = class {81  constructor(buffer) {82    this.pos = 0;83    this.buffer = buffer;84  }85  next() {86    return this.buffer.charCodeAt(this.pos++);87  }88  peek() {89    return this.buffer.charCodeAt(this.pos);90  }91  indexOf(char) {92    const { buffer, pos } = this;93    const idx = buffer.indexOf(char, pos);94    return idx === -1 ? buffer.length : idx;95  }96};97 98// src/scopes.ts99var EMPTY = [];100function decodeOriginalScopes(input) {101  const { length } = input;102  const reader = new StringReader(input);103  const scopes = [];104  const stack = [];105  let line = 0;106  for (; reader.pos < length; reader.pos++) {107    line = decodeInteger(reader, line);108    const column = decodeInteger(reader, 0);109    if (!hasMoreVlq(reader, length)) {110      const last = stack.pop();111      last[2] = line;112      last[3] = column;113      continue;114    }115    const kind = decodeInteger(reader, 0);116    const fields = decodeInteger(reader, 0);117    const hasName = fields & 1;118    const scope = hasName ? [line, column, 0, 0, kind, decodeInteger(reader, 0)] : [line, column, 0, 0, kind];119    let vars = EMPTY;120    if (hasMoreVlq(reader, length)) {121      vars = [];122      do {123        const varsIndex = decodeInteger(reader, 0);124        vars.push(varsIndex);125      } while (hasMoreVlq(reader, length));126    }127    scope.vars = vars;128    scopes.push(scope);129    stack.push(scope);130  }131  return scopes;132}133function encodeOriginalScopes(scopes) {134  const writer = new StringWriter();135  for (let i = 0; i < scopes.length; ) {136    i = _encodeOriginalScopes(scopes, i, writer, [0]);137  }138  return writer.flush();139}140function _encodeOriginalScopes(scopes, index, writer, state) {141  const scope = scopes[index];142  const { 0: startLine, 1: startColumn, 2: endLine, 3: endColumn, 4: kind, vars } = scope;143  if (index > 0) writer.write(comma);144  state[0] = encodeInteger(writer, startLine, state[0]);145  encodeInteger(writer, startColumn, 0);146  encodeInteger(writer, kind, 0);147  const fields = scope.length === 6 ? 1 : 0;148  encodeInteger(writer, fields, 0);149  if (scope.length === 6) encodeInteger(writer, scope[5], 0);150  for (const v of vars) {151    encodeInteger(writer, v, 0);152  }153  for (index++; index < scopes.length; ) {154    const next = scopes[index];155    const { 0: l, 1: c } = next;156    if (l > endLine || l === endLine && c >= endColumn) {157      break;158    }159    index = _encodeOriginalScopes(scopes, index, writer, state);160  }161  writer.write(comma);162  state[0] = encodeInteger(writer, endLine, state[0]);163  encodeInteger(writer, endColumn, 0);164  return index;165}166function decodeGeneratedRanges(input) {167  const { length } = input;168  const reader = new StringReader(input);169  const ranges = [];170  const stack = [];171  let genLine = 0;172  let definitionSourcesIndex = 0;173  let definitionScopeIndex = 0;174  let callsiteSourcesIndex = 0;175  let callsiteLine = 0;176  let callsiteColumn = 0;177  let bindingLine = 0;178  let bindingColumn = 0;179  do {180    const semi = reader.indexOf(";");181    let genColumn = 0;182    for (; reader.pos < semi; reader.pos++) {183      genColumn = decodeInteger(reader, genColumn);184      if (!hasMoreVlq(reader, semi)) {185        const last = stack.pop();186        last[2] = genLine;187        last[3] = genColumn;188        continue;189      }190      const fields = decodeInteger(reader, 0);191      const hasDefinition = fields & 1;192      const hasCallsite = fields & 2;193      const hasScope = fields & 4;194      let callsite = null;195      let bindings = EMPTY;196      let range;197      if (hasDefinition) {198        const defSourcesIndex = decodeInteger(reader, definitionSourcesIndex);199        definitionScopeIndex = decodeInteger(200          reader,201          definitionSourcesIndex === defSourcesIndex ? definitionScopeIndex : 0202        );203        definitionSourcesIndex = defSourcesIndex;204        range = [genLine, genColumn, 0, 0, defSourcesIndex, definitionScopeIndex];205      } else {206        range = [genLine, genColumn, 0, 0];207      }208      range.isScope = !!hasScope;209      if (hasCallsite) {210        const prevCsi = callsiteSourcesIndex;211        const prevLine = callsiteLine;212        callsiteSourcesIndex = decodeInteger(reader, callsiteSourcesIndex);213        const sameSource = prevCsi === callsiteSourcesIndex;214        callsiteLine = decodeInteger(reader, sameSource ? callsiteLine : 0);215        callsiteColumn = decodeInteger(216          reader,217          sameSource && prevLine === callsiteLine ? callsiteColumn : 0218        );219        callsite = [callsiteSourcesIndex, callsiteLine, callsiteColumn];220      }221      range.callsite = callsite;222      if (hasMoreVlq(reader, semi)) {223        bindings = [];224        do {225          bindingLine = genLine;226          bindingColumn = genColumn;227          const expressionsCount = decodeInteger(reader, 0);228          let expressionRanges;229          if (expressionsCount < -1) {230            expressionRanges = [[decodeInteger(reader, 0)]];231            for (let i = -1; i > expressionsCount; i--) {232              const prevBl = bindingLine;233              bindingLine = decodeInteger(reader, bindingLine);234              bindingColumn = decodeInteger(reader, bindingLine === prevBl ? bindingColumn : 0);235              const expression = decodeInteger(reader, 0);236              expressionRanges.push([expression, bindingLine, bindingColumn]);237            }238          } else {239            expressionRanges = [[expressionsCount]];240          }241          bindings.push(expressionRanges);242        } while (hasMoreVlq(reader, semi));243      }244      range.bindings = bindings;245      ranges.push(range);246      stack.push(range);247    }248    genLine++;249    reader.pos = semi + 1;250  } while (reader.pos < length);251  return ranges;252}253function encodeGeneratedRanges(ranges) {254  if (ranges.length === 0) return "";255  const writer = new StringWriter();256  for (let i = 0; i < ranges.length; ) {257    i = _encodeGeneratedRanges(ranges, i, writer, [0, 0, 0, 0, 0, 0, 0]);258  }259  return writer.flush();260}261function _encodeGeneratedRanges(ranges, index, writer, state) {262  const range = ranges[index];263  const {264    0: startLine,265    1: startColumn,266    2: endLine,267    3: endColumn,268    isScope,269    callsite,270    bindings271  } = range;272  if (state[0] < startLine) {273    catchupLine(writer, state[0], startLine);274    state[0] = startLine;275    state[1] = 0;276  } else if (index > 0) {277    writer.write(comma);278  }279  state[1] = encodeInteger(writer, range[1], state[1]);280  const fields = (range.length === 6 ? 1 : 0) | (callsite ? 2 : 0) | (isScope ? 4 : 0);281  encodeInteger(writer, fields, 0);282  if (range.length === 6) {283    const { 4: sourcesIndex, 5: scopesIndex } = range;284    if (sourcesIndex !== state[2]) {285      state[3] = 0;286    }287    state[2] = encodeInteger(writer, sourcesIndex, state[2]);288    state[3] = encodeInteger(writer, scopesIndex, state[3]);289  }290  if (callsite) {291    const { 0: sourcesIndex, 1: callLine, 2: callColumn } = range.callsite;292    if (sourcesIndex !== state[4]) {293      state[5] = 0;294      state[6] = 0;295    } else if (callLine !== state[5]) {296      state[6] = 0;297    }298    state[4] = encodeInteger(writer, sourcesIndex, state[4]);299    state[5] = encodeInteger(writer, callLine, state[5]);300    state[6] = encodeInteger(writer, callColumn, state[6]);301  }302  if (bindings) {303    for (const binding of bindings) {304      if (binding.length > 1) encodeInteger(writer, -binding.length, 0);305      const expression = binding[0][0];306      encodeInteger(writer, expression, 0);307      let bindingStartLine = startLine;308      let bindingStartColumn = startColumn;309      for (let i = 1; i < binding.length; i++) {310        const expRange = binding[i];311        bindingStartLine = encodeInteger(writer, expRange[1], bindingStartLine);312        bindingStartColumn = encodeInteger(writer, expRange[2], bindingStartColumn);313        encodeInteger(writer, expRange[0], 0);314      }315    }316  }317  for (index++; index < ranges.length; ) {318    const next = ranges[index];319    const { 0: l, 1: c } = next;320    if (l > endLine || l === endLine && c >= endColumn) {321      break;322    }323    index = _encodeGeneratedRanges(ranges, index, writer, state);324  }325  if (state[0] < endLine) {326    catchupLine(writer, state[0], endLine);327    state[0] = endLine;328    state[1] = 0;329  } else {330    writer.write(comma);331  }332  state[1] = encodeInteger(writer, endColumn, state[1]);333  return index;334}335function catchupLine(writer, lastLine, line) {336  do {337    writer.write(semicolon);338  } while (++lastLine < line);339}340 341// src/sourcemap-codec.ts342function decode(mappings) {343  const { length } = mappings;344  const reader = new StringReader(mappings);345  const decoded = [];346  let genColumn = 0;347  let sourcesIndex = 0;348  let sourceLine = 0;349  let sourceColumn = 0;350  let namesIndex = 0;351  do {352    const semi = reader.indexOf(";");353    const line = [];354    let sorted = true;355    let lastCol = 0;356    genColumn = 0;357    while (reader.pos < semi) {358      let seg;359      genColumn = decodeInteger(reader, genColumn);360      if (genColumn < lastCol) sorted = false;361      lastCol = genColumn;362      if (hasMoreVlq(reader, semi)) {363        sourcesIndex = decodeInteger(reader, sourcesIndex);364        sourceLine = decodeInteger(reader, sourceLine);365        sourceColumn = decodeInteger(reader, sourceColumn);366        if (hasMoreVlq(reader, semi)) {367          namesIndex = decodeInteger(reader, namesIndex);368          seg = [genColumn, sourcesIndex, sourceLine, sourceColumn, namesIndex];369        } else {370          seg = [genColumn, sourcesIndex, sourceLine, sourceColumn];371        }372      } else {373        seg = [genColumn];374      }375      line.push(seg);376      reader.pos++;377    }378    if (!sorted) sort(line);379    decoded.push(line);380    reader.pos = semi + 1;381  } while (reader.pos <= length);382  return decoded;383}384function sort(line) {385  line.sort(sortComparator);386}387function sortComparator(a, b) {388  return a[0] - b[0];389}390function encode(decoded) {391  const writer = new StringWriter();392  let sourcesIndex = 0;393  let sourceLine = 0;394  let sourceColumn = 0;395  let namesIndex = 0;396  for (let i = 0; i < decoded.length; i++) {397    const line = decoded[i];398    if (i > 0) writer.write(semicolon);399    if (line.length === 0) continue;400    let genColumn = 0;401    for (let j = 0; j < line.length; j++) {402      const segment = line[j];403      if (j > 0) writer.write(comma);404      genColumn = encodeInteger(writer, segment[0], genColumn);405      if (segment.length === 1) continue;406      sourcesIndex = encodeInteger(writer, segment[1], sourcesIndex);407      sourceLine = encodeInteger(writer, segment[2], sourceLine);408      sourceColumn = encodeInteger(writer, segment[3], sourceColumn);409      if (segment.length === 4) continue;410      namesIndex = encodeInteger(writer, segment[4], namesIndex);411    }412  }413  return writer.flush();414}415export {416  decode,417  decodeGeneratedRanges,418  decodeOriginalScopes,419  encode,420  encodeGeneratedRanges,421  encodeOriginalScopes422};423//# sourceMappingURL=sourcemap-codec.mjs.map424