91 lines
1.9 KiB
JavaScript
91 lines
1.9 KiB
JavaScript
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/**
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* @license Apache-2.0
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*
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* Copyright (c) 2022 The Stdlib Authors.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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'use strict';
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// VARIABLES //
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var RE = /%(?:([1-9]\d*)\$)?([0 +\-#]*)(\*|\d+)?(?:(\.)(\*|\d+)?)?[hlL]?([%A-Za-z])/g;
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// FUNCTIONS //
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/**
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* Parses a delimiter.
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*
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* @private
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* @param {Array} match - regular expression match
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* @returns {Object} delimiter token object
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*/
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function parse( match ) {
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var token = {
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'mapping': ( match[ 1 ] ) ? parseInt( match[ 1 ], 10 ) : void 0,
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'flags': match[ 2 ],
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'width': match[ 3 ],
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'precision': match[ 5 ],
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'specifier': match[ 6 ]
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};
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if ( match[ 4 ] === '.' && match[ 5 ] === void 0 ) {
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token.precision = '1';
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}
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return token;
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}
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// MAIN //
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/**
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* Tokenizes a string into an array of string parts and format identifier objects.
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*
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* @param {string} str - input string
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* @returns {Array} tokens
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*
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* @example
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* var tokens = formatTokenize( 'Hello %s!' );
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* // returns [ 'Hello ', {...}, '!' ]
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*/
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function formatTokenize( str ) {
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var content;
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var tokens;
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var match;
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var prev;
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tokens = [];
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prev = 0;
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match = RE.exec( str );
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while ( match ) {
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content = str.slice( prev, RE.lastIndex - match[ 0 ].length );
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if ( content.length ) {
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tokens.push( content );
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}
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tokens.push( parse( match ) );
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prev = RE.lastIndex;
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match = RE.exec( str );
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}
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content = str.slice( prev );
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if ( content.length ) {
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tokens.push( content );
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}
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return tokens;
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}
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// EXPORTS //
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module.exports = formatTokenize;
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