Mercurial > dropbear
view bn_mp_init_multi.c @ 145:a96ff234ff19 libtommath
propagate of fc94c38452d9fd684a8e1eb9e3a73120aac0d38f and 3e4de4cbef3d9035a7b2f0c25e9f86e297f9f6d1 from branch 'au.asn.ucc.matt.ltm-orig' to 'au.asn.ucc.matt.ltm-db'
author | Matt Johnston <matt@ucc.asn.au> |
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date | Sun, 19 Dec 2004 15:57:19 +0000 |
parents | d29b64170cf0 |
children |
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#include <tommath.h> #ifdef BN_MP_INIT_MULTI_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.org */ #include <stdarg.h> int mp_init_multi(mp_int *mp, ...) { mp_err res = MP_OKAY; /* Assume ok until proven otherwise */ int n = 0; /* Number of ok inits */ mp_int* cur_arg = mp; va_list args; va_start(args, mp); /* init args to next argument from caller */ while (cur_arg != NULL) { if (mp_init(cur_arg) != MP_OKAY) { /* Oops - error! Back-track and mp_clear what we already succeeded in init-ing, then return error. */ va_list clean_args; /* end the current list */ va_end(args); /* now start cleaning up */ cur_arg = mp; va_start(clean_args, mp); while (n--) { mp_clear(cur_arg); cur_arg = va_arg(clean_args, mp_int*); } va_end(clean_args); res = MP_MEM; break; } n++; cur_arg = va_arg(args, mp_int*); } va_end(args); return res; /* Assumed ok, if error flagged above. */ } #endif