Re-import from Subversion.

[pdclib] / functions / math / sqrt.c

diff --git a/functions/math/sqrt.c b/functions/math/sqrt.c
index 3c6c1266f020b612c0e0c30efbedb2c1c5600ad1..802f4ce20e7f8a9990f5fc2aecb5bd0316c73c4b 100644 (file)
--- a/functions/math/sqrt.c
+++ b/functions/math/sqrt.c
@@ -1,19 +1,27 @@
-// ----------------------------------------------------------------------------
-// $Id$
-// ----------------------------------------------------------------------------
-// Public Domain C Library - http://pdclib.sourceforge.net
-// This code is Public Domain. Use, modify, and redistribute at will.
-// ----------------------------------------------------------------------------
+/* ----------------------------------------------------------------------------
+ * $Id$
+ * ----------------------------------------------------------------------------
+ * Public Domain C Library - http://pdclib.sourceforge.net
+ * This code is Public Domain. Use, modify, and redistribute at will.
+ * --------------------------------------------------------------------------*/
 
-// ----------------------------------------------------------------------------
-// C++
-
-float sqrt( float x ) { /* TODO */ };
-long double sqrt( long double x ) { /* TODO */ };
+double sqrt( double x ) { /* TODO */ };
 
-// ----------------------------------------------------------------------------
-// Standard C
+/* Therx code
+{
+    double i = x / 2;
+    if ( x < 0 )
+    {
+        return 0;
+    }
+    // (15 DP) HOW GET MORE?
+    while ( ( fabs( i - ( x / i ) ) / i ) > 0.000000000000001)
+    {
+        i = ( i + ( x / i ) ) / 2;
+    }
+    return i;
+}
+*/
 
-double sqrt( double x ) { /* TODO */ };
 float sqrtf( float x ) { /* TODO */ };
 long double sqrtl( long double x ) { /* TODO */ };