From a8ad82f43cb499dbb16722a074d5337db887a194 Mon Sep 17 00:00:00 2001
From: Alexander Kobel <akobel@mpi-inf.mpg.de>
Date: Thu, 23 Jul 2015 12:20:42 +0200
Subject: [PATCH] change argument order for arb_abs and arb_neg; correct
 documentation of arb_abs

---
 arb.h              | 5 ++---
 arb/abs.c          | 7 +++----
 arb/neg.c          | 7 +++----
 doc/source/arb.rst | 3 +--
 4 files changed, 9 insertions(+), 13 deletions(-)

diff --git a/arb.h b/arb.h
index 0b644870..ced4c9b5 100644
--- a/arb.h
+++ b/arb.h
@@ -190,11 +190,11 @@ void arb_set_round(arb_t z, const arb_t x, long prec);
 
 void arb_trim(arb_t y, const arb_t x);
 
-void arb_neg(arb_t x, const arb_t y);
+void arb_neg(arb_t y, const arb_t x);
 
 void arb_neg_round(arb_t x, const arb_t y, long prec);
 
-void arb_abs(arb_t x, const arb_t y);
+void arb_abs(arb_t y, const arb_t x);
 
 void _arb_digits_round_inplace(char * s, mp_bitcnt_t * shift, fmpz_t error, long n, arf_rnd_t rnd);
 
@@ -1070,4 +1070,3 @@ void arb_atan_arf_bb(arb_t z, const arf_t x, long prec);
 #endif
 
 #endif
-
diff --git a/arb/abs.c b/arb/abs.c
index 6501eee5..8e6b1b5c 100644
--- a/arb/abs.c
+++ b/arb/abs.c
@@ -26,9 +26,8 @@
 #include "arb.h"
 
 void
-arb_abs(arb_t x, const arb_t y)
+arb_abs(arb_t y, const arb_t x)
 {
-    arf_abs(arb_midref(x), arb_midref(y));
-    mag_set(arb_radref(x), arb_radref(y));
+    arf_abs(arb_midref(y), arb_midref(x));
+    mag_set(arb_radref(y), arb_radref(x));
 }
-
diff --git a/arb/neg.c b/arb/neg.c
index 3fb65277..c8a09d46 100644
--- a/arb/neg.c
+++ b/arb/neg.c
@@ -26,9 +26,8 @@
 #include "arb.h"
 
 void
-arb_neg(arb_t x, const arb_t y)
+arb_neg(arb_t y, const arb_t x)
 {
-    arf_neg(arb_midref(x), arb_midref(y));
-    mag_set(arb_radref(x), arb_radref(y));
+    arf_neg(arb_midref(y), arb_midref(x));
+    mag_set(arb_radref(y), arb_radref(x));
 }
-
diff --git a/doc/source/arb.rst b/doc/source/arb.rst
index 21dca2b4..e8b28138 100644
--- a/doc/source/arb.rst
+++ b/doc/source/arb.rst
@@ -525,7 +525,7 @@ Arithmetic
 
     Sets *y* to the negation of *x*.
 
-.. function:: void arb_abs(arb_t x, const arb_t y)
+.. function:: void arb_abs(arb_t y, const arb_t x)
 
     Sets *y* to the absolute value of *x*. No attempt is made to improve the
     interval represented by *x* if it contains zero.
@@ -1429,4 +1429,3 @@ Vector functions
     Calls :func:`arb_get_unique_fmpz` elementwise and returns nonzero if
     all entries can be rounded uniquely to integers. If any entry in *vec*
     cannot be rounded uniquely to an integer, returns zero.
-