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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 isLayout = require( '@stdlib/blas/base/assert/is-layout' );
var isColumnMajor = require( '@stdlib/ndarray/base/assert/is-column-major-string' );
var format = require( '@stdlib/string/format' );
var max = require( '@stdlib/math/base/special/fast/max' );
var ndarray = require( './ndarray.js' );
// MAIN //
/**
* Fills the rows of a matrix from a vector of fill values.
*
* @param {string} order - storage layout
* @param {integer} M - number of rows in `X`
* @param {integer} N - number of columns in `X`
* @param {Collection} alpha - vector containing fill values
* @param {Collection} X - input matrix
* @param {integer} LDX - stride of the first dimension of `X` (a.k.a., leading dimension of the matrix `X`)
* @throws {TypeError} first argument must be a valid order
* @throws {RangeError} sixth argument must be greater than or equal to max(1,M) for column-major or max(1,N) for row-major
* @returns {Collection} input matrix
*
* @example
* var alpha = [ 10.0, 20.0 ];
* var X = [ 1.0, 2.0, 3.0, 4.0, 5.0, 6.0 ];
*
* gfillRows( 'row-major', 2, 3, alpha, X, 3 );
* // X => [ 10.0, 10.0, 10.0, 20.0, 20.0, 20.0 ]
*/
function gfillRows( order, M, N, alpha, X, LDX ) {
var strideX1;
var strideX2;
var s;
if ( !isLayout( order ) ) {
throw new TypeError( format( 'invalid argument. First argument must be a valid order. Value: `%s`.', order ) );
}
if ( isColumnMajor( order ) ) {
s = M;
strideX1 = 1;
strideX2 = LDX;
} else { // order === 'row-major'
s = N;
strideX1 = LDX;
strideX2 = 1;
}
if ( LDX < max( 1, s ) ) {
throw new RangeError( format( 'invalid argument. Sixth argument must be greater than or equal to max(1,%d). Value: `%d`.', s, LDX ) );
}
return ndarray( M, N, alpha, 1, 0, X, strideX1, strideX2, 0 );
}
// EXPORTS //
module.exports = gfillRows;
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