[Gmp-commit] /var/hg/gmp-proj/mini-gmp: 3 new changesets

[mercurial at gmplib.org]

details:   /var/hg/gmp-proj/mini-gmp/rev/69a48c7448ed
changeset: 58:69a48c7448ed
user:      Niels M?ller <nisse at lysator.liu.se>
date:      Tue Jan 10 09:15:15 2012 +0100
description:
Include <stddef.h>, for size_t. Improved file header.

details:   /var/hg/gmp-proj/mini-gmp/rev/0eb5a0e48947
changeset: 59:0eb5a0e48947
user:      Niels M?ller <nisse at lysator.liu.se>
date:      Tue Jan 10 09:15:40 2012 +0100
description:
Improved file header.

details:   /var/hg/gmp-proj/mini-gmp/rev/44e854485004
changeset: 60:44e854485004
user:      Niels M?ller <nisse at lysator.liu.se>
date:      Tue Jan 10 09:26:11 2012 +0100
description:
>From Marco: popcount and comment improvements.

diffstat:

 mini-gmp.c |  18 ++++++++++++------
 mini-gmp.h |  11 +++++++----
 2 files changed, 19 insertions(+), 10 deletions(-)

diffs (75 lines):

diff -r f39867e4af01 -r 44e854485004 mini-gmp.c
--- a/mini-gmp.c	Sat Jan 07 23:30:10 2012 +0100
+++ b/mini-gmp.c	Tue Jan 10 09:26:11 2012 +0100
@@ -1,5 +1,7 @@
-/* Implementation for GNU minimalistic multiple precision functions.
-
+/* mini-gmp, a minimalistic implementation of a GNU GMP subset.
+
+   Contributed to the GNU project by Niels Möller
+   
 Copyright 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1999, 2000, 2001,
 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012 Free
 Software Foundation, Inc.
@@ -19,6 +21,10 @@
 You should have received a copy of the GNU Lesser General Public License
 along with the GNU MP Library.  If not, see http://www.gnu.org/licenses/.  */
 
+/* NOTE: All functions in this file which are not declared in
+   mini-gmp.h are internal, and are not intended to be compatible
+   neither with GMP nor with future versions of mini-gmp. */
+
 /* Much of the material copied from GMP files, including: gmp-impl.h,
    longlong.h, mpn/generic/add_n.c, mpn/generic/addmul_1.c,
    mpn/generic/lshift.c, mpn/generic/mul_1.c,
@@ -1714,7 +1720,7 @@
   return an;
 }
 
-/* Adds to the absolute value. Returns new size, (or -1 on underflow),
+/* Subtract from the absolute value. Returns new size, (or -1 on underflow),
    but doesn't store it. */
 static mp_size_t
 mpz_abs_sub_ui (mpz_t r, const mpz_t a, unsigned long b)
@@ -3214,9 +3220,9 @@
   /* Do 16 bits at a time, to avoid limb-sized constants. */
   for (c = 0; x > 0; x >>= 16)
     {
-      unsigned w = ((x & 0xaaaa) >> 1) + (x & 0x5555);
-      w = ((w & 0xcccc) >> 2) + (w & 0x3333);
-      w = ((w & 0xf0f0) >> 4) + (w & 0x0f0f);
+      unsigned w = ((x >> 1) & 0x5555) + (x & 0x5555);
+      w = ((w >> 2) & 0x3333) + (w & 0x3333);
+      w = ((w >> 4) & 0x0f0f) + (w & 0x0f0f);
       w = (w >> 8) + (w & 0x00ff);
       c += w;
     }
diff -r f39867e4af01 -r 44e854485004 mini-gmp.h
--- a/mini-gmp.h	Sat Jan 07 23:30:10 2012 +0100
+++ b/mini-gmp.h	Tue Jan 10 09:26:11 2012 +0100
@@ -1,4 +1,4 @@
-/* Definitions for GNU minimalistic multiple precision functions.
+/* mini-gmp, a minimalistic implementation of a GNU GMP subset.
 
 Copyright 2011, 2012 Free Software Foundation, Inc.
 
@@ -20,13 +20,16 @@
 /* About mini-gmp: This is a minimal implementation of a subset of the
    GMP interface. It is intended for inclusion into applications which
    have modest bignums needs, as a fallback when the real GMP library
-   is not installed. */
-   
-   
+   is not installed.
+
+   This file defines the public interface. */
 
 #ifndef __MINI_GMP_H__
 #define __MINI_GMP_H__
 
+/* For size_t */
+#include <stddef.h>
+
 #if defined (__cplusplus)
 extern "C" {
 #endif