refactor: modify C implementation to accept float instead of int32

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---

Author: gunjjoshi

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

@@ -164,19 +164,19 @@ logEachMap( 'tribonaccif(%d) = %0.4f', v, tribonaccif );
 Computes the nth [Tribonacci number][tribonacci-number] as a [single-precision floating-point number][ieee754].
 
 ```c
-float out = stdlib_base_tribonaccif( 0 );
+float out = stdlib_base_tribonaccif( 0.0f );
 // returns 0.0f
 
-out = stdlib_base_tribonaccif( 4 );
+out = stdlib_base_tribonaccif( 4.0f );
 // returns 2.0f
 ```
 
 The function accepts the following arguments:
 
--   **n**: `[in] int32_t` input value.
+-   **n**: `[in] float` input value.
 
 ```c
-float stdlib_base_tribonaccif( const int32_t n );
+float stdlib_base_tribonaccif( const float n );
 ```
 
 </section>
@@ -200,15 +200,14 @@ float stdlib_base_tribonaccif( const int32_t n );
 ```c
 #include "stdlib/math/base/special/tribonaccif.h"
 #include <stdio.h>
-#include <stdint.h>
 
 int main( void ) {
-    int32_t i;
+    float i;
     float v;
 
-    for ( i = 0; i < 31; i++ ) {
+    for ( i = 0.0f; i < 31.0f; i++ ) {
         v = stdlib_base_tribonaccif( i );
-        printf( "tribonaccif(%d) = %f\n", i, v );
+        printf( "tribonaccif(%f) = %f\n", i, v );
     }
 }
 ```

lib/node_modules/@stdlib/math/base/special/tribonaccif/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)floorf( 40.0f*rand_float() );
+		x[ i ] = floorf( 40.0f*rand_float() );
 	}
 
 	t = tic();

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

@@ -18,14 +18,13 @@
 
 #include "stdlib/math/base/special/tribonaccif.h"
 #include <stdio.h>
-#include <stdint.h>
 
 int main( void ) {
-	int32_t i;
+	float i;
 	float v;
 
-	for ( i = 0; i < 31; i++ ) {
+	for ( i = 0.0f; i < 31.0f; i++ ) {
 		v = stdlib_base_tribonaccif( i );
-		printf( "tribonaccif(%d) = %f\n", i, v );
+		printf( "tribonaccif(%f) = %f\n", i, v );
 	}
 }

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

@@ -19,16 +19,14 @@
 #ifndef STDLIB_MATH_BASE_SPECIAL_TRIBONACCIF_H
 #define STDLIB_MATH_BASE_SPECIAL_TRIBONACCIF_H
 
-#include <stdint.h>
-
 #ifdef __cplusplus
 extern "C" {
 #endif
 
 /**
 * Computes the nth Tribonacci number as a single-precision floating-point number.
 */
-float stdlib_base_tribonaccif( const int32_t n );
+float stdlib_base_tribonaccif( const float n );
 
 #ifdef __cplusplus
 };

lib/node_modules/@stdlib/math/base/special/tribonaccif/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 FLOAT32_MAX_SAFE_NTH_TRIBONACCI = require( '@stdlib/constants/float32/max-safe-nth-tribonacci' ); // eslint-disable-line id-length
 var TRIBONACCIF = require( './tribonaccif.json' );
 
@@ -77,8 +77,7 @@ var TRIBONACCIF = require( './tribonaccif.json' );
 function tribonaccif( n ) {
 	if (
 		isnanf( n ) ||
-		isIntegerf( n ) === false ||
-		n < 0 ||
+		!isNonnegativeIntegerf( n ) ||
 		n > FLOAT32_MAX_SAFE_NTH_TRIBONACCI
 	) {
 		return NaN;

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

@@ -37,7 +37,9 @@
       "libpath": [],
       "dependencies": [
         "@stdlib/math/base/napi/unary",
-        "@stdlib/constants/float32/max-safe-nth-tribonacci"
+        "@stdlib/constants/float32/max-safe-nth-tribonacci",
+        "@stdlib/math/base/assert/is-nonnegative-integerf",
+        "@stdlib/math/base/assert/is-nanf"
       ]
     },
     {
@@ -51,7 +53,9 @@
       "libraries": [],
       "libpath": [],
       "dependencies": [
-        "@stdlib/constants/float32/max-safe-nth-tribonacci"
+        "@stdlib/constants/float32/max-safe-nth-tribonacci",
+        "@stdlib/math/base/assert/is-nonnegative-integerf",
+        "@stdlib/math/base/assert/is-nanf"
       ]
     },
     {
@@ -65,7 +69,9 @@
       "libraries": [],
       "libpath": [],
       "dependencies": [
-        "@stdlib/constants/float32/max-safe-nth-tribonacci"
+        "@stdlib/constants/float32/max-safe-nth-tribonacci",
+        "@stdlib/math/base/assert/is-nonnegative-integerf",
+        "@stdlib/math/base/assert/is-nanf"
       ]
     }
   ]

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

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

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

@@ -18,7 +18,10 @@
 
 #include "stdlib/math/base/special/tribonaccif.h"
 #include "stdlib/constants/float32/max_safe_nth_tribonacci.h"
+#include "stdlib/math/base/assert/is_nonnegative_integerf.h"
+#include "stdlib/math/base/assert/is_nanf.h"
 #include <stdint.h>
+#include <stdlib.h>
 
 static const int32_t tribonaccif_value[ 31 ] = {
 	0,
@@ -61,12 +64,12 @@ static const int32_t tribonaccif_value[ 31 ] = {
 * @return      output value
 *
 * @example
-* float out = stdlib_base_tribonaccif( 1 );
+* float out = stdlib_base_tribonaccif( 1.0f );
 * // returns 0.0f
 */
-float stdlib_base_tribonaccif( const int32_t n ) {
-	if ( n < 0 || n > STDLIB_CONSTANT_FLOAT32_MAX_SAFE_NTH_TRIBONACCI ) {
+float stdlib_base_tribonaccif( const float n ) {
+	if ( stdlib_base_is_nanf( n ) || !stdlib_base_is_nonnegative_integerf( n ) || n > STDLIB_CONSTANT_FLOAT32_MAX_SAFE_NTH_TRIBONACCI ) {
 		return 0.0f / 0.0f; // NaN
 	}
-	return tribonaccif_value[ n ];
+	return tribonaccif_value[ (size_t)n ];
 }

lib/node_modules/@stdlib/math/base/special/tribonaccif/test/test.native.js

@@ -23,6 +23,7 @@
 var resolve = require( 'path' ).resolve;
 var tape = require( 'tape' );
 var isnanf = require( '@stdlib/math/base/assert/is-nanf' );
+var PINF = require( '@stdlib/constants/float32/pinf' );
 var tryRequire = require( '@stdlib/utils/try-require' );
 
 
@@ -58,6 +59,24 @@ tape( 'if provided a negative number, the function returns `NaN`', opts, functio
 	t.end();
 });
 
+tape( 'if provided positive infinity, the function returns `NaN`', function test( t ) {
+	var v = tribonaccif( PINF );
+	t.strictEqual( isnanf( v ), true, 'returns expected value' );
+	t.end();
+});
+
+tape( 'if provided `NaN`, the function returns `NaN`', function test( t ) {
+	var v = tribonaccif( NaN );
+	t.strictEqual( isnanf( v ), true, 'returns expected value' );
+	t.end();
+});
+
+tape( 'if provided a non-integer, the function returns `NaN`', function test( t ) {
+	var v = tribonaccif( 3.14 );
+	t.strictEqual( isnanf( v ), true, 'returns expected value' );
+	t.end();
+});
+
 tape( 'the function returns the nth Tribonacci number', opts, function test( t ) {
 	var v;
 	var i;