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* @license Apache-2.0
*
* Copyright (c) 2022 The Stdlib Authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
'use strict';
// MODULES //
var noop = require( '@stdlib/utils/noop' );
// FUNCTIONS //
/**
* Throws a provided exception.
*
* @private
* @param {Error} err - error object
* @throws {Error} exception
*/
function throwError( err ) {
throw err;
}
// MAIN //
/**
* Returns default options.
*
* @private
* @returns {Object} default options
*
* @example
* var o = defaults();
* // returns {...}
*/
function defaults() {
return {
// Character sequence appearing at the beginning of a row which demarcates that the row content should be parsed as a commented line. A commented line ends upon encountering the first newline character sequence, regardless of whether that newline character sequence is preceded by an escape character sequence.
'comment': '',
// Character sequence separating record fields (e.g., use `','` for CSV and use `'\t'` for TSV).
'delimiter': ',',
// Flag indicating how quote sequences should be escaped within a quoted field. When `true`, a quote sequence must be escaped by another quote sequence. When `false`, a quote sequence must be escaped by the escape sequence.
'doublequote': true,
// Character sequence for escaping character sequences having special meaning (i.e., delimiter, newline, escape, and comment outside of quoted fields, and the quote sequence within quoted fields when `doublequote` is `false`).
'escape': '',
// Flag indicating whether to trim leading whitespace from field values. If `false`, leading whitespace is not trimmed (e.g., `a, b, c` parses as `[ 'a', ' b', ' c' ]`). If `true`, leading whitespace is trimmed (e.g., `a, b, c` parses as `[ 'a', 'b', 'c' ]`).
'ltrim': false,
// Maximum number of records to process.
'maxRows': 1e308,
// Character sequence separating rows.
'newline': '\r\n',
// Callback to be invoked upon closing the parser.
'onClose': noop,
// Callback to be invoked upon processing a field.
'onColumn': noop,
// Callback to be invoked upon processing a commented line.
'onComment': null,
// Callback to be invoked upon encountering an unrecoverable parse error.
'onError': throwError,
// Callback to be invoked upon processing a record.
'onRow': noop,
// Callback to be invoked upon skipping a line.
'onSkip': null,
// When `strict` is `false`, a callback to be invoked upon encountering invalid DSV.
'onWarn': null,
// Character sequence demarcating the beginning and ending of a quoted field.
'quote': '"',
// Flag indicating whether to enable special processing of quote character sequences (i.e., whether a quote sequence should demarcate a quoted field).
'quoting': true,
// Array-like object for storing the field values of the most recently processed record. This allows reusing memory and avoiding copies upon invocation of the `onRow` callback.
'rowBuffer': [],
// Flag indicating whether to trim trailing whitespace from field values. If `false`, trailing whitespace is not trimmed (e.g., `a ,b , c` parses as `[ 'a ', 'b ', ' c' ]`). If `true`, trailing whitespace is trimmed (e.g., `a ,b ,c` parses as `[ 'a', 'b', 'c' ]`).
'rtrim': false,
// Character sequence appearing at the beginning of a row which demarcates that the row content should be skipped.
'skip': '',
// Flag indicating whether to skip over rows which are either empty or containing only whitespace.
'skipBlankRows': false,
// Callback whose return value indicates whether to skip over a row.
'skipRow': null,
// Flag indicating whether to raise an exception upon encountering invalid DSV.
'strict': true,
// Flag indicating whether to trim leading whitespace in commented lines.
'trimComment': true,
// List of characters to be treated as whitespace.
'whitespace': [ ' ' ]
};
}
// EXPORTS //
module.exports = defaults;
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