time-to-botec

Benchmark sampling in different programming languages
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format_integer.js (2717B)

      1 /**
      2 * @license Apache-2.0
      3 *
      4 * Copyright (c) 2022 The Stdlib Authors.
      5 *
      6 * Licensed under the Apache License, Version 2.0 (the "License");
      7 * you may not use this file except in compliance with the License.
      8 * You may obtain a copy of the License at
      9 *
     10 *    http://www.apache.org/licenses/LICENSE-2.0
     11 *
     12 * Unless required by applicable law or agreed to in writing, software
     13 * distributed under the License is distributed on an "AS IS" BASIS,
     14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     15 * See the License for the specific language governing permissions and
     16 * limitations under the License.
     17 */
     18 
     19 'use strict';
     20 
     21 // MODULES //
     22 
     23 var isNumber = require( './is_number.js' );
     24 var zeroPad = require( './zero_pad.js' );
     25 
     26 // NOTE: for the following, we explicitly avoid using stdlib packages in this particular package in order to avoid circular dependencies.
     27 var lowercase = String.prototype.toLowerCase;
     28 var uppercase = String.prototype.toUpperCase;
     29 
     30 
     31 // MAIN //
     32 
     33 /**
     34 * Formats a token object argument as an integer.
     35 *
     36 * @private
     37 * @param {Object} token - token object
     38 * @throws {Error} must provide a valid integer
     39 * @returns {string} formatted token argument
     40 */
     41 function formatInteger( token ) {
     42 	var base;
     43 	var out;
     44 	var i;
     45 
     46 	switch ( token.specifier ) {
     47 	case 'b':
     48 		// Case: %b (binary)
     49 		base = 2;
     50 		break;
     51 	case 'o':
     52 		// Case: %o (octal)
     53 		base = 8;
     54 		break;
     55 	case 'x':
     56 	case 'X':
     57 		// Case: %x, %X (hexadecimal)
     58 		base = 16;
     59 		break;
     60 	case 'd':
     61 	case 'i':
     62 	case 'u':
     63 	default:
     64 		// Case: %d, %i, %u (decimal)
     65 		base = 10;
     66 		break;
     67 	}
     68 	out = token.arg;
     69 	i = parseInt( out, 10 );
     70 	if ( !isFinite( i ) ) { // NOTE: We use the global `isFinite` function here instead of `@stdlib/math/base/assert/is-finite` in order to avoid circular dependencies.
     71 		if ( !isNumber( out ) ) {
     72 			throw new Error( 'invalid integer. Value: ' + out );
     73 		}
     74 		i = 0;
     75 	}
     76 	if ( i < 0 && ( token.specifier === 'u' || base !== 10 ) ) {
     77 		i = 0xffffffff + i + 1;
     78 	}
     79 	if ( i < 0 ) {
     80 		out = ( -i ).toString( base );
     81 		if ( token.precision ) {
     82 			out = zeroPad( out, token.precision, token.padRight );
     83 		}
     84 		out = '-' + out;
     85 	} else {
     86 		out = i.toString( base );
     87 		if ( !i && !token.precision ) {
     88 			out = '';
     89 		} else if ( token.precision ) {
     90 			out = zeroPad( out, token.precision, token.padRight );
     91 		}
     92 		if ( token.sign ) {
     93 			out = token.sign + out;
     94 		}
     95 	}
     96 	if ( base === 16 ) {
     97 		if ( token.alternate ) {
     98 			out = '0x' + out;
     99 		}
    100 		out = ( token.specifier === uppercase.call( token.specifier ) ) ?
    101 			uppercase.call( out ) :
    102 			lowercase.call( out );
    103 	}
    104 	if ( base === 8 ) {
    105 		if ( token.alternate && out.charAt( 0 ) !== '0' ) {
    106 			out = '0' + out;
    107 		}
    108 	}
    109 	return out;
    110 }
    111 
    112 
    113 // EXPORTS //
    114 
    115 module.exports = formatInteger;