refactor!: modify C implementation to accept float instead of int32 in math/base/special/factorial2f

lib/node_modules/@stdlib/math/base/special/factorial2f/README.md

@@ -136,16 +136,16 @@ logEachMap( 'factorial2f(%d) = %0.1f', x, factorial2f );
 Evaluates the [double factorial][double-factorial] of `n` as a single-precision floating-point number.
 
 ```c
-float out = stdlib_base_factorial2f( 3 );
+float out = stdlib_base_factorial2f( 3.0f );
 // returns 3.0f
 ```
 
 The function accepts the following arguments:
 
--   **n**: `[in] int32_t` input value.
+-   **n**: `[in] float` input value.
 
 ```c
-float stdlib_base_factorial2f( const int32_t n );
+float stdlib_base_factorial2f( const float n );
 ```
 
 </section>
@@ -169,16 +169,15 @@ float stdlib_base_factorial2f( const int32_t n );
 ```c
 #include "stdlib/math/base/special/factorial2f.h"
 #include <stdio.h>
-#include <stdint.h>
 
 int main( void ) {
-    const int32_t x[] = { 1, 10, 50, 56, 57 };
+    const float x[] = { 1.0f, 10.0f, 50.0f, 56.0f, 57.0f };
 
     float b;
     int i;
     for ( i = 0; i < 5; i++ ) {
         b = stdlib_base_factorial2f( x[ i ] );
-        printf ( "factorial2f(%d) = %f\n", x[ i ], b );
+        printf ( "factorial2f(%f) = %f\n", x[ i ], b );
     }
 }
 ```

lib/node_modules/@stdlib/math/base/special/factorial2f/benchmark/c/native/benchmark.c

@@ -91,14 +91,14 @@ static float rand_float( void ) {
 * @return elapsed time in seconds
 */
 static double benchmark( void ) {
-	int32_t x[ 100 ];
+	float x[ 100 ];
 	double elapsed;
 	double t;
 	float y;
 	int i;
 
 	for ( i = 0; i < 100; i++ ) {
-		x[ i ] = (int32_t)( 56*rand_float() );
+		x[ i ] = roundf( 56.0f * rand_float() );
 	}
 
 	t = tic();

lib/node_modules/@stdlib/math/base/special/factorial2f/examples/c/example.c

@@ -18,15 +18,14 @@
 
 #include "stdlib/math/base/special/factorial2f.h"
 #include <stdio.h>
-#include <stdint.h>
 
 int main( void ) {
-	const int32_t x[] = { 1, 10, 50, 56, 57 };
+	const float x[] = { 1.0f, 10.0f, 50.0f, 56.0f, 57.0f };
 
 	float b;
 	int i;
 	for ( i = 0; i < 5; i++ ) {
 		b = stdlib_base_factorial2f( x[ i ] );
-		printf ( "factorial2f(%d) = %f\n", x[ i ], b );
+		printf ( "factorial2f(%lf) = %f\n", x[ i ], b );
 	}
 }

lib/node_modules/@stdlib/math/base/special/factorial2f/include/stdlib/math/base/special/factorial2f.h

@@ -19,8 +19,6 @@
 #ifndef STDLIB_MATH_BASE_SPECIAL_FACTORIAL2F_H
 #define STDLIB_MATH_BASE_SPECIAL_FACTORIAL2F_H
 
-#include <stdint.h>
-
 /*
 * If C++, prevent name mangling so that the compiler emits a binary file having undecorated names, thus mirroring the behavior of a C compiler.
 */
@@ -31,7 +29,7 @@ extern "C" {
 /**
 * Evaluates the double factorial of `n` as a single-precision floating-point number.
 */
-float stdlib_base_factorial2f( const int32_t n );
+float stdlib_base_factorial2f( const float n );
 
 #ifdef __cplusplus
 }

lib/node_modules/@stdlib/math/base/special/factorial2f/lib/main.js

@@ -21,7 +21,7 @@
 // MODULES //
 
 var isnanf = require( '@stdlib/math/base/assert/is-nanf' );
-var isIntegerf = require( '@stdlib/math/base/assert/is-integerf' );
+var isNonnegativeIntegerf = require( '@stdlib/math/base/assert/is-nonnegative-integerf' );
 var isEvenf = require( '@stdlib/math/base/assert/is-evenf' );
 var float64ToFloat32 = require( '@stdlib/number/float64/base/to-float32' );
 var PINF = require( '@stdlib/constants/float32/pinf' );
@@ -62,15 +62,12 @@ function factorial2f( n ) {
 	var v;
 	var i;
 
-	if ( isnanf( n ) ) {
+	if ( isnanf( n ) || !isNonnegativeIntegerf( n ) ) {
 		return NaN;
 	}
 	if ( n > FLOAT32_MAX_NTH_DOUBLE_FACTORIAL ) {
 		return PINF;
 	}
-	if ( n < 0 || isIntegerf( n ) === false ) {
-		return NaN;
-	}
 	v = n|0; // asm type annotation
 	if ( v === 0|0 || v === 1|0 ) {
 		return 1|0; // asm type annotation

lib/node_modules/@stdlib/math/base/special/factorial2f/manifest.json

@@ -37,9 +37,10 @@
       "libpath": [],
       "dependencies": [
         "@stdlib/math/base/napi/unary",
-        "@stdlib/math/base/assert/int32-is-even",
+        "@stdlib/math/base/assert/is-evenf",
         "@stdlib/constants/float32/pinf",
-        "@stdlib/constants/float32/max-nth-double-factorial"
+        "@stdlib/constants/float32/max-nth-double-factorial",
+        "@stdlib/math/base/assert/is-nonnegative-integerf"
       ]
     },
     {
@@ -53,9 +54,10 @@
       "libraries": [],
       "libpath": [],
       "dependencies": [
-        "@stdlib/math/base/assert/int32-is-even",
+        "@stdlib/math/base/assert/is-evenf",
         "@stdlib/constants/float32/pinf",
-        "@stdlib/constants/float32/max-nth-double-factorial"
+        "@stdlib/constants/float32/max-nth-double-factorial",
+        "@stdlib/math/base/assert/is-nonnegative-integerf"
       ]
     },
     {
@@ -69,9 +71,10 @@
       "libraries": [],
       "libpath": [],
       "dependencies": [
-        "@stdlib/math/base/assert/int32-is-even",
+        "@stdlib/math/base/assert/is-evenf",
         "@stdlib/constants/float32/pinf",
-        "@stdlib/constants/float32/max-nth-double-factorial"
+        "@stdlib/constants/float32/max-nth-double-factorial",
+        "@stdlib/math/base/assert/is-nonnegative-integerf"
       ]
     }
   ]

lib/node_modules/@stdlib/math/base/special/factorial2f/src/addon.c

@@ -19,4 +19,4 @@
 #include "stdlib/math/base/special/factorial2f.h"
 #include "stdlib/math/base/napi/unary.h"
 
-STDLIB_MATH_BASE_NAPI_MODULE_I_F( stdlib_base_factorial2f )
+STDLIB_MATH_BASE_NAPI_MODULE_F_F( stdlib_base_factorial2f )

lib/node_modules/@stdlib/math/base/special/factorial2f/src/main.c

@@ -17,42 +17,42 @@
 */
 
 #include "stdlib/math/base/special/factorial2f.h"
-#include "stdlib/math/base/assert/int32_is_even.h"
+#include "stdlib/math/base/assert/is_evenf.h"
 #include "stdlib/constants/float32/pinf.h"
 #include "stdlib/constants/float32/max_nth_double_factorial.h"
-#include <stdint.h>
+#include "stdlib/math/base/assert/is_nonnegative_integerf.h"
 
 /**
 * Evaluates the double factorial of `n` as a single-precision floating-point number.
 *
-* @param x         input value
+* @param n         input value
 * @return          double factorial
 *
 * @example
-* float v = stdlib_base_factorial2f( 3 );
+* float v = stdlib_base_factorial2f( 3.0f );
 * // returns 3.0f
 */
-float stdlib_base_factorial2f( const int32_t n ) {
-	int32_t last;
-	int32_t i;
+float stdlib_base_factorial2f( const float n ) {
+	float last;
 	float out;
+	float i;
 
+	if ( !stdlib_base_is_nonnegative_integerf( n ) ) {
+		return 0.0f / 0.0f; // NaN
+	}
 	if ( n > STDLIB_CONSTANT_FLOAT32_MAX_NTH_DOUBLE_FACTORIAL ) {
 		return STDLIB_CONSTANT_FLOAT32_PINF;
 	}
-	if ( n < 0 ) {
-		return 0.0f / 0.0f; // NaN
-	}
-	if ( n == 0 || n == 1 ) {
+	if ( n == 0.0f || n == 1.0f ) {
 		return 1.0f;
 	}
-	if ( stdlib_base_int32_is_even( n ) ) {
-		last = 2;
+	if ( stdlib_base_is_evenf( n ) ) {
+		last = 2.0f;
 	} else {
-		last = 3;
+		last = 3.0f;
 	}
 	out = 1.0f;
-	for ( i = n; i >= last; i -= 2 ) {
+	for ( i = n; i >= last; i -= 2.0f ) {
 		out *= i;
 	}
 	return out;