diff options
Diffstat (limited to 'libtommath/bn_mp_import.c')
-rw-r--r-- | libtommath/bn_mp_import.c | 73 |
1 files changed, 0 insertions, 73 deletions
diff --git a/libtommath/bn_mp_import.c b/libtommath/bn_mp_import.c deleted file mode 100644 index 2e26261..0000000 --- a/libtommath/bn_mp_import.c +++ /dev/null @@ -1,73 +0,0 @@ -#include <tommath_private.h> -#ifdef BN_MP_IMPORT_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, tstdenis82@gmail.com, http://libtom.org - */ - -/* based on gmp's mpz_import. - * see http://gmplib.org/manual/Integer-Import-and-Export.html - */ -int mp_import(mp_int* rop, size_t count, int order, size_t size, - int endian, size_t nails, const void* op) { - int result; - size_t odd_nails, nail_bytes, i, j; - unsigned char odd_nail_mask; - - mp_zero(rop); - - if (endian == 0) { - union {
- unsigned int i;
- char c[4];
- } lint; - lint.i = 0x01020304;
-
- endian = (lint.c[0] == 4) ? -1 : 1; - } - - odd_nails = (nails % 8); - odd_nail_mask = 0xff; - for (i = 0; i < odd_nails; ++i) { - odd_nail_mask ^= (1 << (7 - i)); - } - nail_bytes = nails / 8; - - for (i = 0; i < count; ++i) { - for (j = 0; j < (size - nail_bytes); ++j) { - unsigned char byte = *( - (unsigned char*)op + - (((order == 1) ? i : ((count - 1) - i)) * size) + - ((endian == 1) ? (j + nail_bytes) : (((size - 1) - j) - nail_bytes)) - ); - - if ( - (result = mp_mul_2d(rop, ((j == 0) ? (8 - odd_nails) : 8), rop)) != MP_OKAY) { - return result; - } - - rop->dp[0] |= (j == 0) ? (byte & odd_nail_mask) : byte; - rop->used += 1; - } - } - - mp_clamp(rop); - - return MP_OKAY; -} - -#endif - -/* ref: $Format:%D$ */ -/* git commit: $Format:%H$ */ -/* commit time: $Format:%ai$ */ |