Mercurial > dropbear
view libtommath/bn_mp_read_signed_bin.c @ 1399:47a3a3cb7d45
Set configure #defines to 1. Escape some strings for m4
author | Matt Johnston <matt@ucc.asn.au> |
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date | Fri, 02 Jun 2017 23:35:30 +0800 |
parents | 5ff8218bcee9 |
children | 60fc6476e044 |
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#include <tommath.h> #ifdef BN_MP_READ_SIGNED_BIN_C /* LibTomMath, multiple-precision integer library -- Tom St Denis * * LibTomMath is a library that provides multiple-precision * integer arithmetic as well as number theoretic functionality. * * The library was designed directly after the MPI library by * Michael Fromberger but has been written from scratch with * additional optimizations in place. * * The library is free for all purposes without any express * guarantee it works. * * Tom St Denis, [email protected], http://math.libtomcrypt.com */ /* read signed bin, big endian, first byte is 0==positive or 1==negative */ int mp_read_signed_bin (mp_int * a, const unsigned char *b, int c) { int res; /* read magnitude */ if ((res = mp_read_unsigned_bin (a, b + 1, c - 1)) != MP_OKAY) { return res; } /* first byte is 0 for positive, non-zero for negative */ if (b[0] == 0) { a->sign = MP_ZPOS; } else { a->sign = MP_NEG; } return MP_OKAY; } #endif /* $Source: /cvs/libtom/libtommath/bn_mp_read_signed_bin.c,v $ */ /* $Revision: 1.4 $ */ /* $Date: 2006/03/31 14:18:44 $ */