first-commit

node_modules/@jridgewell/sourcemap-codec/src/scopes.ts

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+import { StringReader, StringWriter } from './strings';
+import { comma, decodeInteger, encodeInteger, hasMoreVlq, semicolon } from './vlq';
+
+const EMPTY: any[] = [];
+
+type Line = number;
+type Column = number;
+type Kind = number;
+type Name = number;
+type Var = number;
+type SourcesIndex = number;
+type ScopesIndex = number;
+
+type Mix<A, B, O> = (A & O) | (B & O);
+
+export type OriginalScope = Mix<
+  [Line, Column, Line, Column, Kind],
+  [Line, Column, Line, Column, Kind, Name],
+  { vars: Var[] }
+>;
+
+export type GeneratedRange = Mix<
+  [Line, Column, Line, Column],
+  [Line, Column, Line, Column, SourcesIndex, ScopesIndex],
+  {
+    callsite: CallSite | null;
+    bindings: Binding[];
+    isScope: boolean;
+  }
+>;
+export type CallSite = [SourcesIndex, Line, Column];
+type Binding = BindingExpressionRange[];
+export type BindingExpressionRange = [Name] | [Name, Line, Column];
+
+export function decodeOriginalScopes(input: string): OriginalScope[] {
+  const { length } = input;
+  const reader = new StringReader(input);
+  const scopes: OriginalScope[] = [];
+  const stack: OriginalScope[] = [];
+  let line = 0;
+
+  for (; reader.pos < length; reader.pos++) {
+    line = decodeInteger(reader, line);
+    const column = decodeInteger(reader, 0);
+
+    if (!hasMoreVlq(reader, length)) {
+      const last = stack.pop()!;
+      last[2] = line;
+      last[3] = column;
+      continue;
+    }
+
+    const kind = decodeInteger(reader, 0);
+    const fields = decodeInteger(reader, 0);
+    const hasName = fields & 0b0001;
+
+    const scope: OriginalScope = (
+      hasName ? [line, column, 0, 0, kind, decodeInteger(reader, 0)] : [line, column, 0, 0, kind]
+    ) as OriginalScope;
+
+    let vars: Var[] = EMPTY;
+    if (hasMoreVlq(reader, length)) {
+      vars = [];
+      do {
+        const varsIndex = decodeInteger(reader, 0);
+        vars.push(varsIndex);
+      } while (hasMoreVlq(reader, length));
+    }
+    scope.vars = vars;
+
+    scopes.push(scope);
+    stack.push(scope);
+  }
+
+  return scopes;
+}
+
+export function encodeOriginalScopes(scopes: OriginalScope[]): string {
+  const writer = new StringWriter();
+
+  for (let i = 0; i < scopes.length; ) {
+    i = _encodeOriginalScopes(scopes, i, writer, [0]);
+  }
+
+  return writer.flush();
+}
+
+function _encodeOriginalScopes(
+  scopes: OriginalScope[],
+  index: number,
+  writer: StringWriter,
+  state: [
+    number, // GenColumn
+  ],
+): number {
+  const scope = scopes[index];
+  const { 0: startLine, 1: startColumn, 2: endLine, 3: endColumn, 4: kind, vars } = scope;
+
+  if (index > 0) writer.write(comma);
+
+  state[0] = encodeInteger(writer, startLine, state[0]);
+  encodeInteger(writer, startColumn, 0);
+  encodeInteger(writer, kind, 0);
+
+  const fields = scope.length === 6 ? 0b0001 : 0;
+  encodeInteger(writer, fields, 0);
+  if (scope.length === 6) encodeInteger(writer, scope[5], 0);
+
+  for (const v of vars) {
+    encodeInteger(writer, v, 0);
+  }
+
+  for (index++; index < scopes.length; ) {
+    const next = scopes[index];
+    const { 0: l, 1: c } = next;
+    if (l > endLine || (l === endLine && c >= endColumn)) {
+      break;
+    }
+    index = _encodeOriginalScopes(scopes, index, writer, state);
+  }
+
+  writer.write(comma);
+  state[0] = encodeInteger(writer, endLine, state[0]);
+  encodeInteger(writer, endColumn, 0);
+
+  return index;
+}
+
+export function decodeGeneratedRanges(input: string): GeneratedRange[] {
+  const { length } = input;
+  const reader = new StringReader(input);
+  const ranges: GeneratedRange[] = [];
+  const stack: GeneratedRange[] = [];
+
+  let genLine = 0;
+  let definitionSourcesIndex = 0;
+  let definitionScopeIndex = 0;
+  let callsiteSourcesIndex = 0;
+  let callsiteLine = 0;
+  let callsiteColumn = 0;
+  let bindingLine = 0;
+  let bindingColumn = 0;
+
+  do {
+    const semi = reader.indexOf(';');
+    let genColumn = 0;
+
+    for (; reader.pos < semi; reader.pos++) {
+      genColumn = decodeInteger(reader, genColumn);
+
+      if (!hasMoreVlq(reader, semi)) {
+        const last = stack.pop()!;
+        last[2] = genLine;
+        last[3] = genColumn;
+        continue;
+      }
+
+      const fields = decodeInteger(reader, 0);
+      const hasDefinition = fields & 0b0001;
+      const hasCallsite = fields & 0b0010;
+      const hasScope = fields & 0b0100;
+
+      let callsite: CallSite | null = null;
+      let bindings: Binding[] = EMPTY;
+      let range: GeneratedRange;
+      if (hasDefinition) {
+        const defSourcesIndex = decodeInteger(reader, definitionSourcesIndex);
+        definitionScopeIndex = decodeInteger(
+          reader,
+          definitionSourcesIndex === defSourcesIndex ? definitionScopeIndex : 0,
+        );
+
+        definitionSourcesIndex = defSourcesIndex;
+        range = [genLine, genColumn, 0, 0, defSourcesIndex, definitionScopeIndex] as GeneratedRange;
+      } else {
+        range = [genLine, genColumn, 0, 0] as GeneratedRange;
+      }
+
+      range.isScope = !!hasScope;
+
+      if (hasCallsite) {
+        const prevCsi = callsiteSourcesIndex;
+        const prevLine = callsiteLine;
+        callsiteSourcesIndex = decodeInteger(reader, callsiteSourcesIndex);
+        const sameSource = prevCsi === callsiteSourcesIndex;
+        callsiteLine = decodeInteger(reader, sameSource ? callsiteLine : 0);
+        callsiteColumn = decodeInteger(
+          reader,
+          sameSource && prevLine === callsiteLine ? callsiteColumn : 0,
+        );
+
+        callsite = [callsiteSourcesIndex, callsiteLine, callsiteColumn];
+      }
+      range.callsite = callsite;
+
+      if (hasMoreVlq(reader, semi)) {
+        bindings = [];
+        do {
+          bindingLine = genLine;
+          bindingColumn = genColumn;
+          const expressionsCount = decodeInteger(reader, 0);
+          let expressionRanges: BindingExpressionRange[];
+          if (expressionsCount < -1) {
+            expressionRanges = [[decodeInteger(reader, 0)]];
+            for (let i = -1; i > expressionsCount; i--) {
+              const prevBl = bindingLine;
+              bindingLine = decodeInteger(reader, bindingLine);
+              bindingColumn = decodeInteger(reader, bindingLine === prevBl ? bindingColumn : 0);
+              const expression = decodeInteger(reader, 0);
+              expressionRanges.push([expression, bindingLine, bindingColumn]);
+            }
+          } else {
+            expressionRanges = [[expressionsCount]];
+          }
+          bindings.push(expressionRanges);
+        } while (hasMoreVlq(reader, semi));
+      }
+      range.bindings = bindings;
+
+      ranges.push(range);
+      stack.push(range);
+    }
+
+    genLine++;
+    reader.pos = semi + 1;
+  } while (reader.pos < length);
+
+  return ranges;
+}
+
+export function encodeGeneratedRanges(ranges: GeneratedRange[]): string {
+  if (ranges.length === 0) return '';
+
+  const writer = new StringWriter();
+
+  for (let i = 0; i < ranges.length; ) {
+    i = _encodeGeneratedRanges(ranges, i, writer, [0, 0, 0, 0, 0, 0, 0]);
+  }
+
+  return writer.flush();
+}
+
+function _encodeGeneratedRanges(
+  ranges: GeneratedRange[],
+  index: number,
+  writer: StringWriter,
+  state: [
+    number, // GenLine
+    number, // GenColumn
+    number, // DefSourcesIndex
+    number, // DefScopesIndex
+    number, // CallSourcesIndex
+    number, // CallLine
+    number, // CallColumn
+  ],
+): number {
+  const range = ranges[index];
+  const {
+    0: startLine,
+    1: startColumn,
+    2: endLine,
+    3: endColumn,
+    isScope,
+    callsite,
+    bindings,
+  } = range;
+
+  if (state[0] < startLine) {
+    catchupLine(writer, state[0], startLine);
+    state[0] = startLine;
+    state[1] = 0;
+  } else if (index > 0) {
+    writer.write(comma);
+  }
+
+  state[1] = encodeInteger(writer, range[1], state[1]);
+
+  const fields =
+    (range.length === 6 ? 0b0001 : 0) | (callsite ? 0b0010 : 0) | (isScope ? 0b0100 : 0);
+  encodeInteger(writer, fields, 0);
+
+  if (range.length === 6) {
+    const { 4: sourcesIndex, 5: scopesIndex } = range;
+    if (sourcesIndex !== state[2]) {
+      state[3] = 0;
+    }
+    state[2] = encodeInteger(writer, sourcesIndex, state[2]);
+    state[3] = encodeInteger(writer, scopesIndex, state[3]);
+  }
+
+  if (callsite) {
+    const { 0: sourcesIndex, 1: callLine, 2: callColumn } = range.callsite!;
+    if (sourcesIndex !== state[4]) {
+      state[5] = 0;
+      state[6] = 0;
+    } else if (callLine !== state[5]) {
+      state[6] = 0;
+    }
+    state[4] = encodeInteger(writer, sourcesIndex, state[4]);
+    state[5] = encodeInteger(writer, callLine, state[5]);
+    state[6] = encodeInteger(writer, callColumn, state[6]);
+  }
+
+  if (bindings) {
+    for (const binding of bindings) {
+      if (binding.length > 1) encodeInteger(writer, -binding.length, 0);
+      const expression = binding[0][0];
+      encodeInteger(writer, expression, 0);
+      let bindingStartLine = startLine;
+      let bindingStartColumn = startColumn;
+      for (let i = 1; i < binding.length; i++) {
+        const expRange = binding[i];
+        bindingStartLine = encodeInteger(writer, expRange[1]!, bindingStartLine);
+        bindingStartColumn = encodeInteger(writer, expRange[2]!, bindingStartColumn);
+        encodeInteger(writer, expRange[0]!, 0);
+      }
+    }
+  }
+
+  for (index++; index < ranges.length; ) {
+    const next = ranges[index];
+    const { 0: l, 1: c } = next;
+    if (l > endLine || (l === endLine && c >= endColumn)) {
+      break;
+    }
+    index = _encodeGeneratedRanges(ranges, index, writer, state);
+  }
+
+  if (state[0] < endLine) {
+    catchupLine(writer, state[0], endLine);
+    state[0] = endLine;
+    state[1] = 0;
+  } else {
+    writer.write(comma);
+  }
+  state[1] = encodeInteger(writer, endColumn, state[1]);
+
+  return index;
+}
+
+function catchupLine(writer: StringWriter, lastLine: number, line: number) {
+  do {
+    writer.write(semicolon);
+  } while (++lastLine < line);
+}

node_modules/@jridgewell/sourcemap-codec/src/sourcemap-codec.ts

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+import { comma, decodeInteger, encodeInteger, hasMoreVlq, semicolon } from './vlq';
+import { StringWriter, StringReader } from './strings';
+
+export {
+  decodeOriginalScopes,
+  encodeOriginalScopes,
+  decodeGeneratedRanges,
+  encodeGeneratedRanges,
+} from './scopes';
+export type { OriginalScope, GeneratedRange, CallSite, BindingExpressionRange } from './scopes';
+
+export type SourceMapSegment =
+  | [number]
+  | [number, number, number, number]
+  | [number, number, number, number, number];
+export type SourceMapLine = SourceMapSegment[];
+export type SourceMapMappings = SourceMapLine[];
+
+export function decode(mappings: string): SourceMapMappings {
+  const { length } = mappings;
+  const reader = new StringReader(mappings);
+  const decoded: SourceMapMappings = [];
+  let genColumn = 0;
+  let sourcesIndex = 0;
+  let sourceLine = 0;
+  let sourceColumn = 0;
+  let namesIndex = 0;
+
+  do {
+    const semi = reader.indexOf(';');
+    const line: SourceMapLine = [];
+    let sorted = true;
+    let lastCol = 0;
+    genColumn = 0;
+
+    while (reader.pos < semi) {
+      let seg: SourceMapSegment;
+
+      genColumn = decodeInteger(reader, genColumn);
+      if (genColumn < lastCol) sorted = false;
+      lastCol = genColumn;
+
+      if (hasMoreVlq(reader, semi)) {
+        sourcesIndex = decodeInteger(reader, sourcesIndex);
+        sourceLine = decodeInteger(reader, sourceLine);
+        sourceColumn = decodeInteger(reader, sourceColumn);
+
+        if (hasMoreVlq(reader, semi)) {
+          namesIndex = decodeInteger(reader, namesIndex);
+          seg = [genColumn, sourcesIndex, sourceLine, sourceColumn, namesIndex];
+        } else {
+          seg = [genColumn, sourcesIndex, sourceLine, sourceColumn];
+        }
+      } else {
+        seg = [genColumn];
+      }
+
+      line.push(seg);
+      reader.pos++;
+    }
+
+    if (!sorted) sort(line);
+    decoded.push(line);
+    reader.pos = semi + 1;
+  } while (reader.pos <= length);
+
+  return decoded;
+}
+
+function sort(line: SourceMapSegment[]) {
+  line.sort(sortComparator);
+}
+
+function sortComparator(a: SourceMapSegment, b: SourceMapSegment): number {
+  return a[0] - b[0];
+}
+
+export function encode(decoded: SourceMapMappings): string;
+export function encode(decoded: Readonly<SourceMapMappings>): string;
+export function encode(decoded: Readonly<SourceMapMappings>): string {
+  const writer = new StringWriter();
+  let sourcesIndex = 0;
+  let sourceLine = 0;
+  let sourceColumn = 0;
+  let namesIndex = 0;
+
+  for (let i = 0; i < decoded.length; i++) {
+    const line = decoded[i];
+    if (i > 0) writer.write(semicolon);
+    if (line.length === 0) continue;
+
+    let genColumn = 0;
+
+    for (let j = 0; j < line.length; j++) {
+      const segment = line[j];
+      if (j > 0) writer.write(comma);
+
+      genColumn = encodeInteger(writer, segment[0], genColumn);
+
+      if (segment.length === 1) continue;
+      sourcesIndex = encodeInteger(writer, segment[1], sourcesIndex);
+      sourceLine = encodeInteger(writer, segment[2], sourceLine);
+      sourceColumn = encodeInteger(writer, segment[3], sourceColumn);
+
+      if (segment.length === 4) continue;
+      namesIndex = encodeInteger(writer, segment[4], namesIndex);
+    }
+  }
+
+  return writer.flush();
+}

node_modules/@jridgewell/sourcemap-codec/src/strings.ts

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+const bufLength = 1024 * 16;
+
+// Provide a fallback for older environments.
+const td =
+  typeof TextDecoder !== 'undefined'
+    ? /* #__PURE__ */ new TextDecoder()
+    : typeof Buffer !== 'undefined'
+      ? {
+          decode(buf: Uint8Array): string {
+            const out = Buffer.from(buf.buffer, buf.byteOffset, buf.byteLength);
+            return out.toString();
+          },
+        }
+      : {
+          decode(buf: Uint8Array): string {
+            let out = '';
+            for (let i = 0; i < buf.length; i++) {
+              out += String.fromCharCode(buf[i]);
+            }
+            return out;
+          },
+        };
+
+export class StringWriter {
+  pos = 0;
+  private out = '';
+  private buffer = new Uint8Array(bufLength);
+
+  write(v: number): void {
+    const { buffer } = this;
+    buffer[this.pos++] = v;
+    if (this.pos === bufLength) {
+      this.out += td.decode(buffer);
+      this.pos = 0;
+    }
+  }
+
+  flush(): string {
+    const { buffer, out, pos } = this;
+    return pos > 0 ? out + td.decode(buffer.subarray(0, pos)) : out;
+  }
+}
+
+export class StringReader {
+  pos = 0;
+  declare private buffer: string;
+
+  constructor(buffer: string) {
+    this.buffer = buffer;
+  }
+
+  next(): number {
+    return this.buffer.charCodeAt(this.pos++);
+  }
+
+  peek(): number {
+    return this.buffer.charCodeAt(this.pos);
+  }
+
+  indexOf(char: string): number {
+    const { buffer, pos } = this;
+    const idx = buffer.indexOf(char, pos);
+    return idx === -1 ? buffer.length : idx;
+  }
+}

node_modules/@jridgewell/sourcemap-codec/src/vlq.ts

@@ -0,0 +1,55 @@
+import type { StringReader, StringWriter } from './strings';
+
+export const comma = ','.charCodeAt(0);
+export const semicolon = ';'.charCodeAt(0);
+
+const chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/';
+const intToChar = new Uint8Array(64); // 64 possible chars.
+const charToInt = new Uint8Array(128); // z is 122 in ASCII
+
+for (let i = 0; i < chars.length; i++) {
+  const c = chars.charCodeAt(i);
+  intToChar[i] = c;
+  charToInt[c] = i;
+}
+
+export function decodeInteger(reader: StringReader, relative: number): number {
+  let value = 0;
+  let shift = 0;
+  let integer = 0;
+
+  do {
+    const c = reader.next();
+    integer = charToInt[c];
+    value |= (integer & 31) << shift;
+    shift += 5;
+  } while (integer & 32);
+
+  const shouldNegate = value & 1;
+  value >>>= 1;
+
+  if (shouldNegate) {
+    value = -0x80000000 | -value;
+  }
+
+  return relative + value;
+}
+
+export function encodeInteger(builder: StringWriter, num: number, relative: number): number {
+  let delta = num - relative;
+
+  delta = delta < 0 ? (-delta << 1) | 1 : delta << 1;
+  do {
+    let clamped = delta & 0b011111;
+    delta >>>= 5;
+    if (delta > 0) clamped |= 0b100000;
+    builder.write(intToChar[clamped]);
+  } while (delta > 0);
+
+  return num;
+}
+
+export function hasMoreVlq(reader: StringReader, max: number) {
+  if (reader.pos >= max) return false;
+  return reader.peek() !== comma;
+}