Changes in src/libcfa/rational.c [3d9b5da:9827c7ba]

File:

• src/libcfa/rational.c (modified) (9 diffs)

src/libcfa/rational.c

@@ -11 +11 @@
 // Created On       : Wed Apr  6 17:54:28 2016
 // Last Modified By : Peter A. Buhr
-// Last Modified On : Thu Apr  7 17:28:03 2016
-// Update Count     : 12
+// Last Modified On : Fri Apr  8 17:35:05 2016
+// Update Count     : 18
 // 
 
@@ -23 +23 @@
 } // extern
 
+
+// constants
+
 struct Rational 0 = {0, 1};
 struct Rational 1 = {1, 1};
 
-// Calculate the greatest common denominator of two numbers, the first of which may be negative.  It is used to reduce
-// rationals.
-
-long int gcd( long int a, long int b ) {
+
+// helper
+
+// Calculate greatest common denominator of two numbers, the first of which may be negative. Used to reduce rationals.
+static long int gcd( long int a, long int b ) {
     for ( ;; ) {                                                                                // Euclid's algorithm
                 long int r = a % b;
@@ -39 +43 @@
 } // gcd
 
-long int simplify( long int *n, long int *d ) {
+static long int simplify( long int *n, long int *d ) {
     if ( *d == 0 ) {
                 serr | "Invalid rational number construction: denominator cannot be equal to 0." | endl;
@@ -48 +52 @@
 } // Rationalnumber::simplify
 
-Rational rational() {                                                                   // constructor
-//    r = (Rational){ 0, 1 };
-        Rational t = { 0, 1 };
-        return t;
+
+// constructors
+
+Rational rational() {
+    return (Rational){ 0, 1 };
 } // rational
 
-Rational rational( long int n ) {                                               // constructor
-//    r = (Rational){ n, 1 };
-        Rational t = { n, 1 };
-        return t;
+Rational rational( long int n ) {
+    return (Rational){ n, 1 };
 } // rational
 
-Rational rational( long int n, long int d ) {                   // constructor
+Rational rational( long int n, long int d ) {
     long int t = simplify( &n, &d );                                    // simplify
-//    r = (Rational){ n / t, d / t };
-        Rational t = { n / t, d / t };
-        return t;
+    return (Rational){ n / t, d / t };
 } // rational
+
+
+// getter/setter for numerator/denominator
 
 long int numerator( Rational r ) {
@@ -79 +83 @@
 } // numerator
 
+long int denominator( Rational r ) {
+    return r.denominator;
+} // denominator
+
 long int denominator( Rational r, long int d ) {
     long int prev = r.denominator;
@@ -87 +95 @@
 } // denominator
 
+
+// comparison
+
 int ?==?( Rational l, Rational r ) {
     return l.numerator * r.denominator == l.denominator * r.numerator;
@@ -110 +121 @@
     return ! ( l < r );
 } // ?>=?
+
+
+// arithmetic
 
 Rational -?( Rational r ) {
@@ -149 +163 @@
     return t;
 } // ?/?
+
+
+// conversion
 
 double widen( Rational r ) {
@@ -188 +205 @@
 } // narrow
 
+
+// I/O
+
 forall( dtype istype | istream( istype ) )
 istype * ?|?( istype *is, Rational *r ) {