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* @license Apache-2.0
*
* Copyright (c) 2026 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 isString = require( '@stdlib/assert/is-string' ).isPrimitive;
var isStringArray = require( '@stdlib/assert/is-string-array' ).primitives;
var isObject = require( '@stdlib/assert/is-plain-object' );
var format = require( '@stdlib/string/format' );
var replace = require( '@stdlib/string/replace' );
var real = require( '@stdlib/complex/float64/real' );
var imag = require( '@stdlib/complex/float64/imag' );
// VARIABLES //
var CTORS = {
'int8': 'new Int8Array( [ {{data}} ] )',
'uint8': 'new Uint8Array( [ {{data}} ] )',
'uint8c': 'new Uint8ClampedArray( [ {{data}} ] )',
'int16': 'new Int16Array( [ {{data}} ] )',
'uint16': 'new Uint16Array( [ {{data}} ] )',
'int32': 'new Int32Array( [ {{data}} ] )',
'uint32': 'new Uint32Array( [ {{data}} ] )',
'float32': 'new Float32Array( [ {{data}} ] )',
'float64': 'new Float64Array( [ {{data}} ] )',
'generic': '[ {{data}} ]',
'binary': 'new Buffer( [ {{data}} ] )',
'complex64': 'new Complex64Array( [ {{data}} ] )',
'complex128': 'new Complex128Array( [ {{data}} ] )',
'bool': 'new BooleanArray( [ {{data}} ] )'
};
// MAIN //
/**
* Serializes an ndarray as a locale-aware string.
*
* ## Notes
*
* - The method does **not** serialize data outside of the buffer region defined by the array configuration.
*
* @private
* @param {(string|Array<string>)} [locales] - locale identifier(s)
* @param {Object} [options] - configuration options
* @throws {TypeError} first argument must be a string or an array of strings
* @throws {TypeError} options argument must be an object
* @returns {string} string representation
*/
function toLocaleString( locales, options ) { // eslint-disable-line stdlib/no-redeclare
/* eslint-disable no-invalid-this */
var buffer;
var ndims;
var ctor;
var opts;
var loc;
var str;
var dt;
var v;
var i;
if ( arguments.length === 0 ) {
loc = [];
} else if ( isString( locales ) || isStringArray( locales ) ) {
loc = locales;
} else {
throw new TypeError( format( 'invalid argument. First argument must be a string or an array of strings. Value: `%s`.', locales ) );
}
if ( arguments.length < 2 ) {
opts = {};
} else if ( isObject( options ) ) {
opts = options;
} else {
throw new TypeError( format( 'invalid argument. Options argument must be an object. Value: `%s`.', options ) );
}
ndims = this._shape.length;
dt = this._dtype;
// Function to invoke to create an ndarray:
str = 'ndarray( \''+dt+'\', ';
// Data buffer parameter...
buffer = '';
if ( this._length <= 100 ) {
if ( dt === 'complex64' || dt === 'complex128' ) {
for ( i = 0; i < this._length; i++ ) {
v = this.iget( i );
buffer += real( v ).toLocaleString( loc, opts ) + ', ' + imag( v ).toLocaleString( loc, opts );
if ( i < this._length-1 ) {
buffer += ', ';
}
}
} else {
for ( i = 0; i < this._length; i++ ) {
buffer += this.iget( i ).toLocaleString( loc, opts );
if ( i < this._length-1 ) {
buffer += ', ';
}
}
}
} else {
// First three values...
if ( dt === 'complex64' || dt === 'complex128' ) {
for ( i = 0; i < 3; i++ ) {
v = this.iget( i );
buffer += real( v ).toLocaleString( loc, opts ) + ', ' + imag( v ).toLocaleString( loc, opts );
if ( i < 2 ) {
buffer += ', ';
}
}
} else {
for ( i = 0; i < 3; i++ ) {
buffer += this.iget( i ).toLocaleString( loc, opts );
if ( i < 2 ) {
buffer += ', ';
}
}
}
buffer += ', ..., ';
// Last three values...
if ( dt === 'complex64' || dt === 'complex128' ) {
for ( i = 2; i >= 0; i-- ) {
v = this.iget( this._length-1-i );
buffer += real( v ).toLocaleString( loc, opts ) + ', ' + imag( v ).toLocaleString( loc, opts );
if ( i > 0 ) {
buffer += ', ';
}
}
} else {
for ( i = 2; i >= 0; i-- ) {
buffer += this.iget( this._length-1-i ).toLocaleString( loc, opts ); // eslint-disable-line max-len
if ( i > 0 ) {
buffer += ', ';
}
}
}
}
ctor = CTORS[ this.dtype ];
str += replace( ctor, '{{data}}', buffer );
str += ', ';
// Array shape...
if ( ndims === 0 ) {
str += '[]';
} else {
str += '[ ' + this._shape.join( ', ' ) + ' ]';
}
str += ', ';
// Stride array...
str += '[ ';
if ( ndims === 0 ) {
str += '0';
} else {
for ( i = 0; i < ndims; i++ ) {
if ( this._strides[ i ] < 0 ) {
str += -this._strides[ i ];
} else {
str += this._strides[ i ];
}
if ( i < ndims-1 ) {
str += ', ';
}
}
}
str += ' ]';
str += ', ';
// Buffer offset:
str += '0';
str += ', ';
// Order:
str += '\'' + this._order + '\'';
// Close the function call:
str += ' )';
return str;
/* eslint-enable no-invalid-this */
}
// EXPORTS //
module.exports = toLocaleString;
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