Method #parseRecord

csv/parse.ts:73–206

(zeroBasedStartLine: number)

    return this.#cursor >= this.#input.length;
  }
  #parseRecord(zeroBasedStartLine: number): string[] | null {
    let fullLine = this.#readLine();
    if (fullLine === null) return null;
    if (fullLine.length === 0) {
      return [];
    }

    let zeroBasedLine = zeroBasedStartLine;

    // line starting with comment character is ignored
    if (this.#options.comment && fullLine[0] === this.#options.comment) {
      return [];
    }

    let line = fullLine;
    const quote = '"';
    const quoteLen = quote.length;
    const separatorLen = this.#options.separator.length;
    let recordBuffer = "";
    const fieldIndexes = [] as number[];
    parseField: while (true) {
      if (this.#options.trimLeadingSpace) {
        line = line.trimStart();
      }

      if (line.length === 0 || !line.startsWith(quote)) {
        // Non-quoted string field
        const i = line.indexOf(this.#options.separator);
        let field = line;
        if (i >= 0) {
          field = field.substring(0, i);
        }
        // Check to make sure a quote does not appear in field.
        if (!this.#options.lazyQuotes) {
          const j = field.indexOf(quote);
          if (j >= 0) {
            const col = codePointLength(
              fullLine.slice(0, fullLine.length - line.slice(j).length),
            );
            throw new SyntaxError(
              createBareQuoteErrorMessage(
                zeroBasedStartLine,
                zeroBasedLine,
                col,
              ),
            );
          }
        }
        recordBuffer += field;
        fieldIndexes.push(recordBuffer.length);
        if (i >= 0) {
          line = line.substring(i + separatorLen);
          continue parseField;
        }
        break parseField;
      } else {
        // Quoted string field
        line = line.substring(quoteLen);