refactor: modify C implementation to accept double value

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---

Author: gunjjoshi

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

@@ -40,7 +40,8 @@
         "@stdlib/constants/float64/nan",
         "@stdlib/math/base/special/floor",
         "@stdlib/math/base/special/ln",
-        "@stdlib/math/base/assert/is-integer"
+        "@stdlib/math/base/assert/is-integer",
+        "@stdlib/constants/float64/pinf"
       ]
     },
     {
@@ -57,7 +58,8 @@
         "@stdlib/constants/float64/nan",
         "@stdlib/math/base/special/floor",
         "@stdlib/math/base/special/ln",
-        "@stdlib/math/base/assert/is-integer"
+        "@stdlib/math/base/assert/is-integer",
+        "@stdlib/constants/float64/pinf"
       ]
     },
     {
@@ -74,7 +76,8 @@
         "@stdlib/constants/float64/nan",
         "@stdlib/math/base/special/floor",
         "@stdlib/math/base/special/ln",
-        "@stdlib/math/base/assert/is-integer"
+        "@stdlib/math/base/assert/is-integer",
+        "@stdlib/constants/float64/pinf"
       ]
     }
   ]

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

@@ -19,6 +19,7 @@
 #include "stdlib/math/base/special/nonfibonacci.h"
 #include "stdlib/math/base/assert/is_integer.h"
 #include "stdlib/constants/float64/nan.h"
+#include "stdlib/constants/float64/pinf.h"
 #include "stdlib/math/base/special/floor.h"
 #include "stdlib/math/base/special/ln.h"
 
@@ -53,7 +54,7 @@ double stdlib_base_nonfibonacci( const double n ) {
 	double b;
 
 	mut_n = n;
-	if ( !stdlib_base_is_integer( n ) || n < 1.0 ) {
+	if ( !stdlib_base_is_integer( n ) || n == STDLIB_CONSTANT_FLOAT64_PINF || n < 1.0 ) {
 		return STDLIB_CONSTANT_FLOAT64_NAN;
 	}