1 files changed, 101 insertions, 0 deletions
diff --git a/contrib/libg++/libg++/tests/tFix.cc b/contrib/libg++/libg++/tests/tFix.cc
new file mode 100644
index 0000000..96256f4
--- /dev/null
+++ b/contrib/libg++/libg++/tests/tFix.cc
@@ -0,0 +1,101 @@
+//
+// testFix.cc : test Fix (variable length) classes
+//
+
+#include <Fix.h>
+
+void check(const char* x, Fix y) { cout << x << " = " << (y) << "\n"; }
+
+void check(const char* x, int y) { cout << x << " = " << (y) << "\n"; }
+
+void check(const char* x, long y) { cout << x << " = " << (y) << "\n"; }
+
+void check(const char* x, double y) { cout << x << " = " << (y) << "\n"; }
+
+void checkb(const char* x, const Fix y)
+{
+  cout << x << " = " << (y) << " [" << length(y) << "]"<< "\n";
+}
+
+
+
+int main() {
+  cout << "Fix: identities should be displayed\n"
+    << "[X] displays the precision of a given value\n"
+    << "[*] indicates that the full precision is not used for coding reasons\n";
+
+  Fix a;		checkb("0 [16]",a);
+  Fix b = .5;		checkb(".5 [16]",b);
+  Fix c(17,-.5);	checkb("-.5 [17]",c);
+  Fix d(33,.1);		checkb(".1 [33]",d);
+  Fix e = c;		checkb("-.5 [17]",e);
+
+  checkb(".3 [16]",a = .3);
+  checkb(".5 [16]",a = b);
+  checkb(".1 [16]",a = d);
+  checkb(".1 [33*]",d = a);
+  checkb("-.2 [17]",c = -.2);
+  checkb("-.5 [17]",e);
+
+  check(".1 [16] == .1 [33*]",a == d);
+  d = .1;
+  check(".1 [16] == .1 [33]",a == d);
+  check(".1 [33] != .5 [16]",d != b);
+  check(".1 [33] > .5 [16]",d > b);
+  check(".1 [33] <= -.2 [17]",d <= c);
+
+  e = .5;
+  check("1073741824",mantissa(e).as_double());
+  check(".5",value(e));
+
+  checkb(".5 [17]",+e);
+  checkb("-.5 [17]",-e);
+
+  checkb(".1 [33] + .5 [16]",d+b);
+  checkb(".1 [33] - .5 [16]",d-b);
+  checkb(".1 [33] * .5 [16]",d*b);
+  checkb(".1 [33] *  3",d*3);
+  checkb(".1 [33] * -3",d*-3);
+  checkb("-.1 [33] *  3",(-d)*3);
+  checkb("-.1 [33] * -3",(-d)*-3);
+  checkb(".5 [17] * -2",e*-2);
+  checkb(".1 [33] % 25",d%25);
+  checkb(".1 [33] % -25",d%-25);
+  checkb(".1 [33] / .5 [16]",d/b);
+  checkb(".1 [33] << 1",d<<1);
+  checkb("-.1 [33] >> 2",(-d)>>2);
+
+  checkb("abs(-.2)",abs(c));
+  checkb("abs(.2)",abs(-c));
+  check("sgn(-.2)",sgn(c));
+  check("sgn(.2)",sgn(-c));
+  
+  cout << "\nshow .1 [33]\n";
+  show(d);
+
+  Fix g = .95;
+
+  cout << "\nFix: range errors warned\n";
+
+  Fix f = 1.1;	checkb("1.1 [16]",f);
+
+  checkb(".5 [16] / .1 [33]",b/d);
+  checkb(".5 [16] / 0. [16]",b/Fix(0.));
+  checkb(".5 [17] * 32768",e*32768);
+
+  cout << "\nFix: overflows saturated\n";
+  Fix::set_overflow_handler(Fix::overflow_saturate);
+
+  checkb(".95 [16] + .1 [33]",g+d);
+  checkb("-.1 [33] - .95 [16]",-d-g);
+  checkb(".5 [17] * 2",e*2);
+
+  cout << "\nFix: overflows generate warnings\n";
+  Fix::set_overflow_handler(Fix::overflow_warning);
+
+  checkb(".95 [16] + .1 [33]",g+d);
+  checkb("-.1 [33] - .95 [16]",-d-g);
+  checkb(".5 [17] * 2",e*2);
+
+  return 0;
+}