1 files changed, 148 insertions, 0 deletions
diff --git a/math/test-math.c b/math/test-math.c
new file mode 100644
index 0000000..a82daed
--- /dev/null
+++ b/math/test-math.c
@@ -0,0 +1,148 @@
+#include <ansidecl.h>
+#include <stdio.h>
+#include <math.h>
+#include <stdlib.h>
+
+void print_trig_stuff __P ((void));
+
+int
+DEFUN_VOID(main)
+{
+  CONST char str[] = "123.456";
+  double x,h,li,lr,a,lrr;
+
+  x = atof (str);
+	
+  printf ("%g %g\n", x, pow (10.0, 3.0));
+  
+  x = sinh(2.0);
+  
+  printf("sinh(2.0) = %g\n", x);
+  
+  x = sinh(3.0);
+  
+  printf("sinh(3.0) = %g\n", x);
+  
+  h = hypot(2.0,3.0);
+  
+  printf("h=%g\n", h);
+  
+  a = atan2(3.0, 2.0);
+  
+  printf("atan2(3,2) = %g\n", a);
+  
+  lr = pow(h,4.0);
+  
+  printf("pow(%g,4.0) = %g\n", h, lr);
+  
+  lrr = lr;
+  
+  li = 4.0 * a;
+  
+  lr = lr / exp(a*5.0);
+  
+  printf("%g / exp(%g * 5) = %g\n", lrr, a, lr);
+  
+  lrr = li;
+  
+  li += 5.0 * log(h);
+  
+  printf("%g + 5*log(%g) = %g\n", lrr, h, li);
+  
+  printf("cos(%g) = %g,  sin(%g) = %g\n", li, cos(li), li, sin(li));
+  
+  x = drem(10.3435,6.2831852);
+
+  printf("drem(10.3435,6.2831852) = %g\n", x);
+
+  x = drem(-10.3435,6.2831852);
+
+  printf("drem(-10.3435,6.2831852) = %g\n", x);
+
+  x = drem(-10.3435,-6.2831852);
+	
+  printf("drem(-10.3435,-6.2831852) = %g\n", x);
+
+  x = drem(10.3435,-6.2831852);
+
+  printf("drem(10.3435,-6.2831852) = %g\n", x);
+
+
+  printf("x%8.6gx\n", .5);
+  printf("x%-8.6gx\n", .5);
+  printf("x%6.6gx\n", .5);
+
+  {
+    double x = atof ("-1e-17-");
+    printf ("%g %c= %g %s!\n",
+	    x,
+	    x == -1e-17 ? '=' : '!',
+	    -1e-17,
+	    x == -1e-17 ? "Worked" : "Failed");
+  }
+
+  print_trig_stuff ();
+
+  return 0;
+}
+
+
+#define PI 3.14159265358979323846264338327
+
+const double RAD[5] = { 0, PI/2, PI, (3*PI)/2, 2*PI };
+const int    DEG[5] = { 0, 90, 180, 360 };
+
+#define PRINT_IT_1_ARG(_func, _arg, _value) \
+    (_value) = (_func)((_arg)); \
+    if (errno) { \
+      errno = 0; \
+      printf("%s = ERROR %s\n", #_func, strerror(errno)); \
+    } else \
+      printf("%s(%g) = %g\n", #_func, _arg, (_value)); \
+
+#define PRINT_IT_2_ARG(_func, _arg1, _arg2, _value) \
+    (_value) = (_func)((_arg1),(_arg2)); \
+    if (errno) { \
+      errno = 0; \
+      printf("%s = ERROR %s\n", #_func, strerror(errno)); \
+    } else \
+      printf("%s(%g, %g) = %g\n", #_func, _arg1, _arg2, (_value)); \
+
+void
+DEFUN_VOID (print_trig_stuff)
+{
+  double value, arg1, arg2;
+  int i;
+
+  puts ("\n\nMath Test");
+
+  errno = 0;			/* automatically reset on error condition */
+  for (i=0; i<4; i++)
+    {
+      PRINT_IT_1_ARG (sin, RAD[i], value);
+      PRINT_IT_1_ARG (cos, RAD[i], value);
+      PRINT_IT_1_ARG (tan, RAD[i], value);
+      PRINT_IT_1_ARG (asin, RAD[i], value);
+      PRINT_IT_1_ARG (acos, RAD[i], value);
+      PRINT_IT_1_ARG (atan, RAD[i], value);
+      PRINT_IT_2_ARG (atan2, RAD[i], -RAD[i % 4], value);
+    }
+
+  arg1 = 16;
+  arg2 = 3;
+  PRINT_IT_1_ARG (exp, arg1, value);
+  PRINT_IT_1_ARG (log, arg1, value);
+  PRINT_IT_1_ARG (log10, arg1, value);
+  PRINT_IT_2_ARG (pow, arg1, arg2, value);
+  PRINT_IT_1_ARG (sqrt, arg1, value);
+  PRINT_IT_1_ARG (cbrt, arg1, value);
+  PRINT_IT_2_ARG (hypot, arg1, arg2, value);
+  PRINT_IT_1_ARG (expm1, arg1, value);
+  PRINT_IT_1_ARG (log1p, arg1, value);
+  PRINT_IT_1_ARG (sinh, arg1, value);
+  PRINT_IT_1_ARG (cosh, arg1, value);
+  PRINT_IT_1_ARG (tanh, arg1, value);
+  PRINT_IT_1_ARG (asinh, arg1, value);
+  PRINT_IT_1_ARG (acosh, arg1, value);
+  PRINT_IT_1_ARG (atanh, arg1, value);
+}