Mercurial > dropbear
diff tomsfastmath/src/bin/fp_read_signed_bin.c @ 643:a362b62d38b2 dropbear-tfm
Add tomsfastmath from git rev bfa4582842bc3bab42e4be4aed5703437049502a
with Makefile.in renamed
author | Matt Johnston <matt@ucc.asn.au> |
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date | Wed, 23 Nov 2011 18:10:20 +0700 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/tomsfastmath/src/bin/fp_read_signed_bin.c Wed Nov 23 18:10:20 2011 +0700 @@ -0,0 +1,27 @@ +/* TomsFastMath, a fast ISO C bignum library. + * + * This project is meant to fill in where LibTomMath + * falls short. That is speed ;-) + * + * This project is public domain and free for all purposes. + * + * Tom St Denis, [email protected] + */ +#include <tfm.h> + +void fp_read_signed_bin(fp_int *a, unsigned char *b, int c) +{ + /* read magnitude */ + fp_read_unsigned_bin (a, b + 1, c - 1); + + /* first byte is 0 for positive, non-zero for negative */ + if (b[0] == 0) { + a->sign = FP_ZPOS; + } else { + a->sign = FP_NEG; + } +} + +/* $Source$ */ +/* $Revision$ */ +/* $Date$ */