text: /**
  * @license Apache-2.0
  *
  * Copyright (c) 2020 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 float64ToFloat32 = require( '@stdlib/number-float64-base-to-float32' );
  var isnanf = require( '@stdlib/math-base-assert-is-nanf' );
  
  
  // MAIN //
  
  /**
  * Computes the range of a single-precision floating-point strided array according to a mask, ignoring `NaN` values.
  *
  * @param {PositiveInteger} N - number of indexed elements
  * @param {Float32Array} x - input array
  * @param {integer} strideX - `x` stride length
  * @param {Uint8Array} mask - mask array
  * @param {integer} strideMask - `mask` stride length
  * @returns {number} range
  *
  * @example
  * var Float32Array = require( '@stdlib/array-float32' );
  * var Uint8Array = require( '@stdlib/array-uint8' );
  *
  * var x = new Float32Array( [ 1.0, -2.0, 4.0, 2.0, NaN ] );
  * var mask = new Uint8Array( [ 0, 0, 1, 0, 0 ] );
  *
  * var v = snanmskrange( x.length, x, 1, mask, 1 );
  * // returns 4.0
  */
  function snanmskrange( N, x, strideX, mask, strideMask ) {
  	var max;
  	var min;
  	var ix;
  	var im;
  	var v;
  	var i;
  
  	if ( N <= 0 ) {
  		return NaN;
  	}
  	if ( strideX < 0 ) {
  		ix = (1-N) * strideX;
  	} else {
  		ix = 0;
  	}
  	if ( strideMask < 0 ) {
  		im = (1-N) * strideMask;
  	} else {
  		im = 0;
  	}
  	for ( i = 0; i < N; i++ ) {
  		v = x[ ix ];
  		if ( v === v && mask[ im ] === 0 ) {
  			break;
  		}
  		ix += strideX;
  		im += strideMask;
  	}
  	if ( i === N ) {
  		return NaN;
  	}
  	min = v;
  	max = min;
  	i += 1;
  	for ( i; i < N; i++ ) {
  		ix += strideX;
  		im += strideMask;
  		if ( mask[ im ] ) {
  			continue;
  		}
  		v = x[ ix ];
  		if ( isnanf( v ) ) {
  			continue;
  		}
  		if ( v < min ) {
  			min = v;
  		} else if ( v > max ) {
  			max = v;
  		}
  	}
  	return float64ToFloat32( max - min );
  }
  
  
  // EXPORTS //
  
  module.exports = snanmskrange;
  