From 7c3537f27dd9edd5c8ff3cfa4aa2748abd975f44 Mon Sep 17 00:00:00 2001
From: matz <matz@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Wed, 5 Jun 2002 09:54:09 +0000
Subject: * math.c (Init_Math): backport asin, acos, atan.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_6@2525 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 math.c | 37 +++++++++++++++++++++++++++++++++++++
 1 file changed, 37 insertions(+)

(limited to 'math.c')

diff --git a/math.c b/math.c
index 2cac83e938..86c889dca9 100644
--- a/math.c
+++ b/math.c
@@ -56,6 +56,39 @@ math_tan(obj, x)
     return rb_float_new(tan(RFLOAT(x)->value));
 }
 
+static VALUE
+math_acos(obj, x)
+    VALUE obj, x;
+{
+    Need_Float(x);
+    /*
+    if (RFLOAT(x)->value < -1.0 || RFLOAT(x)->value > 1.0)
+	rb_raise(rb_eArgError, "Out of range (-1..1)");
+    */
+    return rb_float_new(acos(RFLOAT(x)->value));
+}
+
+static VALUE
+math_asin(obj, x)
+    VALUE obj, x;
+{
+    Need_Float(x);
+    /*
+    if (RFLOAT(x)->value < -1.0 || RFLOAT(x)->value > 1.0)
+	rb_raise(rb_eArgError, "Out of range (-1..1)");
+    */
+    return rb_float_new(asin(RFLOAT(x)->value));
+}
+
+static VALUE
+math_atan(obj, x)
+    VALUE obj, x;
+{
+    Need_Float(x);
+    
+    return rb_float_new(atan(RFLOAT(x)->value));
+}
+
 static VALUE
 math_exp(obj, x)
     VALUE obj, x;
@@ -140,6 +173,10 @@ Init_Math()
     rb_define_module_function(rb_mMath, "sin", math_sin, 1);
     rb_define_module_function(rb_mMath, "tan", math_tan, 1);
 
+    rb_define_module_function(rb_mMath, "acos", math_acos, 1);
+    rb_define_module_function(rb_mMath, "asin", math_asin, 1);
+    rb_define_module_function(rb_mMath, "atan", math_atan, 1);
+
     rb_define_module_function(rb_mMath, "exp", math_exp, 1);
     rb_define_module_function(rb_mMath, "log", math_log, 1);
     rb_define_module_function(rb_mMath, "log10", math_log10, 1);
-- 
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