From 32ea95ab25f619c71ee439a1508daec2213e2da8 Mon Sep 17 00:00:00 2001
From: Andreas Enge <andreas.enge@inria.fr>
Date: Tue, 24 May 2016 15:01:47 +0200
Subject: mpc_rootofunity: Finish adding the function.

* doc/mpc.texi, NEWS: Document the function.
* Makefile.vc: Add the new files.
---
 Makefile.vc  | 4 ++++
 NEWS         | 2 +-
 doc/mpc.texi | 6 ++++++
 3 files changed, 11 insertions(+), 1 deletion(-)

diff --git a/Makefile.vc b/Makefile.vc
index 201ddfe..32c92b6 100644
--- a/Makefile.vc
+++ b/Makefile.vc
@@ -159,6 +159,7 @@ $(DIRMPC)\pow_ui.obj \
 $(DIRMPC)\pow_z.obj \
 $(DIRMPC)\proj.obj \
 $(DIRMPC)\real.obj \
+$(DIRMPC)\rootofunity.obj \
 $(DIRMPC)\set.obj \
 $(DIRMPC)\set_prec.obj \
 $(DIRMPC)\set_str.obj \
@@ -237,6 +238,7 @@ pow_ui.obj \
 pow_z.obj \
 proj.obj \
 real.obj \
+rootofunity.obj \
 set.obj \
 set_prec.obj \
 set_str.obj \
@@ -403,6 +405,8 @@ test :
 	cd $(DIRMPCTESTS) && treal.exe && cd ..
 	$(TESTCOMPILE)treimref.c  $(MIDTESTCOMPILE)treimref.exe $(ENDTESTCOMPILE)
 	cd $(DIRMPCTESTS) && treimref.exe && cd ..
+	$(TESTCOMPILE)trootofunity.c  $(MIDTESTCOMPILE)trootofunity.exe $(ENDTESTCOMPILE)
+	cd $(DIRMPCTESTS) && trootofunity.exe && cd ..
 	$(TESTCOMPILE)tset.c  $(MIDTESTCOMPILE)tset.exe $(ENDTESTCOMPILE)
 	cd $(DIRMPCTESTS) && tset.exe && cd ..
 	$(TESTCOMPILE)tsin.c  $(MIDTESTCOMPILE)tsin.exe $(ENDTESTCOMPILE)
diff --git a/NEWS b/NEWS
index 4971f7f..be9557e 100644
--- a/NEWS
+++ b/NEWS
@@ -1,6 +1,6 @@
 Recent changes in the trunk:
   - Minimally required library version: mpfr 3.0.0
-  - New function: mpc_cmp_abs
+  - New functions: mpc_cmp_abs, mpc_rootofunity
   - Improved speed for corner cases of mpc_asin, mpc_sin, see
     http://lists.gforge.inria.fr/pipermail/mpc-discuss/2013-December/001266.html
   - Rewrite of the testing framework
diff --git a/doc/mpc.texi b/doc/mpc.texi
index 6286347..aa629a1 100644
--- a/doc/mpc.texi
+++ b/doc/mpc.texi
@@ -981,6 +981,12 @@ so that the imaginary part of the result lies in
 @math{]-\pi , \pi]} and @math{]-\pi/log(10) , \pi/log(10)]} respectively.
 @end deftypefun
 
+@deftypefun int mpc_rootofunity (mpc_t @var{rop}, unsigned long int @var{n}, mpc_rnd_t @var{rnd})
+Set @var{rop} to the standard primitive @var{n}-th root of unity,
+@math{\exp (2 \pi i / n)},
+rounded according to @var{rnd} with the precision of @var{rop}.
+@end deftypefun
+
 
 @node Trigonometric Functions
 @section Trigonometric Functions
-- 
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