Mercurial > dropbear
comparison bn_reverse.c @ 282:91fbc376f010 libtommath-orig libtommath-0.35
Import of libtommath 0.35
From ltm-0.35.tar.bz2 SHA1 of 3f193dbae9351e92d02530994fa18236f7fde01c
| author | Matt Johnston <matt@ucc.asn.au> |
|---|---|
| date | Wed, 08 Mar 2006 13:16:18 +0000 |
| parents | |
| children | 97db060d0ef5 |
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| -1:000000000000 | 282:91fbc376f010 |
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| 1 #include <tommath.h> | |
| 2 #ifdef BN_REVERSE_C | |
| 3 /* LibTomMath, multiple-precision integer library -- Tom St Denis | |
| 4 * | |
| 5 * LibTomMath is a library that provides multiple-precision | |
| 6 * integer arithmetic as well as number theoretic functionality. | |
| 7 * | |
| 8 * The library was designed directly after the MPI library by | |
| 9 * Michael Fromberger but has been written from scratch with | |
| 10 * additional optimizations in place. | |
| 11 * | |
| 12 * The library is free for all purposes without any express | |
| 13 * guarantee it works. | |
| 14 * | |
| 15 * Tom St Denis, [email protected], http://math.libtomcrypt.org | |
| 16 */ | |
| 17 | |
| 18 /* reverse an array, used for radix code */ | |
| 19 void | |
| 20 bn_reverse (unsigned char *s, int len) | |
| 21 { | |
| 22 int ix, iy; | |
| 23 unsigned char t; | |
| 24 | |
| 25 ix = 0; | |
| 26 iy = len - 1; | |
| 27 while (ix < iy) { | |
| 28 t = s[ix]; | |
| 29 s[ix] = s[iy]; | |
| 30 s[iy] = t; | |
| 31 ++ix; | |
| 32 --iy; | |
| 33 } | |
| 34 } | |
| 35 #endif |