diff options
author | Matthieu Patou <mat@matws.net> | 2010-08-15 18:31:28 +0400 |
---|---|---|
committer | Andrew Bartlett <abartlet@samba.org> | 2010-10-03 01:15:04 +0000 |
commit | ab6e3fce040f9ad27cbce44e9038a24f15b601c8 (patch) | |
tree | ab99a431c9610927b5d0d26335d2712b509fd6dc /source4/heimdal/lib/hcrypto/libtommath/bn_mp_fread.c | |
parent | 197a1514d62494cc8b862d169c841a26e04b8925 (diff) | |
download | samba-ab6e3fce040f9ad27cbce44e9038a24f15b601c8.tar.gz samba-ab6e3fce040f9ad27cbce44e9038a24f15b601c8.tar.bz2 samba-ab6e3fce040f9ad27cbce44e9038a24f15b601c8.zip |
s4:heimdal: import lorikeet-heimdal-201009250123 (commit 42cabfb5b683dbcb97d583c397b897507689e382)
I based this on Matthieu's import of lorikeet-heimdal, and then
updated it to this commit.
Andrew Bartlett
Diffstat (limited to 'source4/heimdal/lib/hcrypto/libtommath/bn_mp_fread.c')
-rw-r--r-- | source4/heimdal/lib/hcrypto/libtommath/bn_mp_fread.c | 67 |
1 files changed, 67 insertions, 0 deletions
diff --git a/source4/heimdal/lib/hcrypto/libtommath/bn_mp_fread.c b/source4/heimdal/lib/hcrypto/libtommath/bn_mp_fread.c new file mode 100644 index 0000000000..b344b6f05d --- /dev/null +++ b/source4/heimdal/lib/hcrypto/libtommath/bn_mp_fread.c @@ -0,0 +1,67 @@ +#include <tommath.h> +#ifdef BN_MP_FREAD_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, tomstdenis@gmail.com, http://libtom.org + */ + +/* read a bigint from a file stream in ASCII */ +int mp_fread(mp_int *a, int radix, FILE *stream) +{ + int err, ch, neg, y; + + /* clear a */ + mp_zero(a); + + /* if first digit is - then set negative */ + ch = fgetc(stream); + if (ch == '-') { + neg = MP_NEG; + ch = fgetc(stream); + } else { + neg = MP_ZPOS; + } + + for (;;) { + /* find y in the radix map */ + for (y = 0; y < radix; y++) { + if (mp_s_rmap[y] == ch) { + break; + } + } + if (y == radix) { + break; + } + + /* shift up and add */ + if ((err = mp_mul_d(a, radix, a)) != MP_OKAY) { + return err; + } + if ((err = mp_add_d(a, y, a)) != MP_OKAY) { + return err; + } + + ch = fgetc(stream); + } + if (mp_cmp_d(a, 0) != MP_EQ) { + a->sign = neg; + } + + return MP_OKAY; +} + +#endif + +/* $Source: /cvs/libtom/libtommath/bn_mp_fread.c,v $ */ +/* $Revision: 1.4 $ */ +/* $Date: 2006/12/28 01:25:13 $ */ |