bench: use random_uniform

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---

Author: anandkaranubc

lib/node_modules/@stdlib/math/base/special/cpolarf/benchmark/c/native/benchmark.c

@@ -77,13 +77,15 @@ static double tic( void ) {
 }
 
 /**
-* Generates a random number on the interval [0,1).
+* Generates a random number on the interval [min,max).
 *
-* @return random number
+* @param min    minimum value (inclusive)
+* @param max    maximum value (exclusive)
+* @return       random number
 */
-static float rand_float( void ) {
-	int r = rand();
-	return (float)r / ( (float)RAND_MAX + 1.0f );
+static float random_uniform( const float min, const float max ) {
+	float v = (float)rand() / ( (float)RAND_MAX + 1.0f );
+	return min + ( v*(max-min) );
 }
 
 /**
@@ -102,8 +104,8 @@ static double benchmark( void ) {
 
 	stdlib_complex64_t z[ 100 ];
 	for ( i = 0; i < 100; i++ ) {
-		re = ( 1000.0f*rand_float() ) - 500.0f;
-		im = ( 1000.0f*rand_float() ) - 500.0f;
+		re = random_uniform( -500.0f, 500.0f );
+		im = random_uniform( -500.0f, 500.0f );
 		z[ i ] = stdlib_complex64( re, im );
 	}