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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.
*/
/* eslint-disable max-len, max-params */
'use strict';
// MODULES //
var resolveStr = require( '@stdlib/blas/base/transpose-operation-resolve-str' );
var format = require( '@stdlib/string/format' );
var base = require( './base.js' );
// MAIN //
/**
* Takes rows from one of two input matrices depending on a condition (ndarray interface).
*
* @param {(integer|string)} transA - specifies whether `A` should be transposed or not transposed
* @param {(integer|string)} transB - specifies whether `B` should be transposed or not transposed
* @param {NonNegativeInteger} M - number of indexed elements in `condition` and number of rows in `op(A)`, `op(B)`, and `out`
* @param {NonNegativeInteger} N - number of columns in `op(A)`, `op(B)` and `out`
* @param {Collection} condition - condition array
* @param {integer} strideC - stride length for `condition`
* @param {NonNegativeInteger} offsetC - starting index for `condition`
* @param {Collection} A - first input matrix
* @param {integer} strideA1 - stride length for the first dimension of `A`
* @param {integer} strideA2 - stride length for the second dimension of `A`
* @param {NonNegativeInteger} offsetA - starting index for `A`
* @param {Collection} B - second input matrix
* @param {integer} strideB1 - stride length for the first dimension of `B`
* @param {integer} strideB2 - stride length for the second dimension of `B`
* @param {NonNegativeInteger} offsetB - starting index for `B`
* @param {Collection} out - output matrix
* @param {integer} strideO1 - stride length for the first dimension of `out`
* @param {integer} strideO2 - stride length for the second dimension of `out`
* @param {NonNegativeInteger} offsetO - starting index for `out`
* @throws {TypeError} first argument must be a valid transpose operation
* @throws {TypeError} second argument must be a valid transpose operation
* @throws {RangeError} third argument must be a nonnegative integer
* @throws {RangeError} fourth argument must be a nonnegative integer
* @throws {RangeError} seventeenth argument must be non-zero
* @throws {RangeError} eighteenth argument must be non-zero
* @returns {Collection} output matrix
*
* @example
* var A = [ 1.0, 2.0, 3.0, 4.0, 5.0, 6.0 ];
* var B = [ 7.0, 8.0, 9.0, 10.0, 11.0, 12.0 ];
* var condition = [ 1, 0 ];
* var out = [ 0.0, 0.0, 0.0, 0.0, 0.0, 0.0 ];
*
* gwhereRows( 'no-transpose', 'no-transpose', 2, 3, condition, 1, 0, A, 3, 1, 0, B, 3, 1, 0, out, 3, 1, 0 );
* // out => [ 1.0, 2.0, 3.0, 10.0, 11.0, 12.0 ]
*/
function gwhereRows( transA, transB, M, N, condition, strideC, offsetC, A, strideA1, strideA2, offsetA, B, strideB1, strideB2, offsetB, out, strideO1, strideO2, offsetO ) {
var ta;
var tb;
// Resolve transposition parameters...
ta = resolveStr( transA );
if ( ta === null ) {
throw new TypeError( format( 'invalid argument. First argument must be a valid transpose operation. Value: `%s`.', transA ) );
}
tb = resolveStr( transB );
if ( tb === null ) {
throw new TypeError( format( 'invalid argument. Second argument must be a valid transpose operation. Value: `%s`.', transB ) );
}
// Validate dimensions...
if ( M < 0 ) {
throw new RangeError( format( 'invalid argument. Third argument must be a nonnegative integer. Value: `%d`.', M ) );
}
if ( N < 0 ) {
throw new RangeError( format( 'invalid argument. Fourth argument must be a nonnegative integer. Value: `%d`.', N ) );
}
// Validate output strides...
if ( strideO1 === 0 ) {
throw new RangeError( format( 'invalid argument. Seventeenth argument must be non-zero. Value: `%d`.', strideO1 ) );
}
if ( strideO2 === 0 ) {
throw new RangeError( format( 'invalid argument. Eighteenth argument must be non-zero. Value: `%d`.', strideO2 ) );
}
return base( ta, tb, M, N, condition, strideC, offsetC, A, strideA1, strideA2, offsetA, B, strideB1, strideB2, offsetB, out, strideO1, strideO2, offsetO );
}
// EXPORTS //
module.exports = gwhereRows;
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