add commands deg, grad and rad

[calc.git] / parser.c

diff --git a/parser.c b/parser.c
index 0f4e6418e46593fe9afd14ed4fb4b63a09fe3109..24afb116c98f19a4a2d0e2724a4d52b6982984fb 100644 (file)
--- a/parser.c
+++ b/parser.c
@@ -18,6 +18,8 @@
 
 double answer = 0;
 
+double anglefactor = 1;
+
 /* compare codes */
 
 int codecmp (char *ref, char *str)
@@ -62,7 +64,7 @@ keyword_t operators[NB_OPERATORS] = {
     { "|",   Or, 2, 1, -2}
 };
 
-#define NB_FUNCTIONS 52
+#define NB_FUNCTIONS 55
 keyword_t functions[NB_FUNCTIONS] = {
     { "sqrt", Sqr, 1, 4, 5},
     { "pow",  Pow, 2, 3, 5},
@@ -115,7 +117,10 @@ keyword_t functions[NB_FUNCTIONS] = {
     { "sum",  Sum, 0, 3, 5},
     { "var",  Variance, 2, 3, 5},
     { "format", Precision, 1, 6, 9},
-    { "base", Base, 2, 4, 9}
+    { "base", Base, 2, 4, 9},
+    { "deg", Deg, 0, 3, 9},
+    { "grad", Grad, 0, 4, 9},
+    { "rad", Rad, 0, 3, 9}
 };
 
 #define NB_CONSTANTS 3
@@ -523,6 +528,9 @@ void print_element (element_t *root, int level)
     case Variance: func = "Variance"; break;
     case Precision: func = "Precision"; break;
     case Base: func = "Base"; break;
+    case Deg: func = "Degree"; break;
+    case Grad: func = "Gradian"; break;
+    case Rad: func = "Radian"; break;
     }
 
     printf ("Function: %s\n", func);
@@ -618,7 +626,7 @@ void help (void)
     printf ("stack func.:");
     printf (" max mean med min ord prod sum var\n");
     printf ("control management:");
-    printf (" base format help quit\n");
+    printf (" base deg format grad help quit rad\n");
     printf ("constants:");
     printf (" ans e pi\n");
 }
@@ -767,6 +775,9 @@ double evaluate_element (element_t *root, char mask)
     case Order:
     case Prod:
     case Sum:
+    case Deg:
+    case Grad:
+    case Rad:
         break;
     case While:
         if (root->ops[0] == NULL) {
@@ -827,12 +838,12 @@ double evaluate_element (element_t *root, char mask)
     case Mod: return fmod (op0, op1);
     case Pow: return pow (op0, op1);
     case Sqr: return sqrt (op0);
-    case Cos: return cos (op0);
-    case Sin: return sin (op0);
-    case Tan: return tan (op0);
-    case Acos: return acos (op0);
-    case Asin: return asin (op0);
-    case Atan: return atan (op0);
+    case Cos: return cos (op0 / anglefactor);
+    case Sin: return sin (op0 / anglefactor);
+    case Tan: return tan (op0 / anglefactor);
+    case Acos: return acos (op0) * anglefactor;
+    case Asin: return asin (op0) * anglefactor;
+    case Atan: return atan (op0) * anglefactor;
     case Ln: return log (op0);
     case Log: return log10 (op0);
     case Exp: return exp (op0);
@@ -933,6 +944,15 @@ double evaluate_element (element_t *root, char mask)
     case Base:
         base ((int)op0, (int)op1);
         break;
+    case Deg:
+        anglefactor = 180 / M_PI;
+        break;
+    case Grad:
+        anglefactor = 200 / M_PI;
+        break;
+    case Rad:
+        anglefactor = 1;
+        break;
     }
 
     return 0;