diff options
Diffstat (limited to 'libtommath/tommath_private.h')
| -rw-r--r-- | libtommath/tommath_private.h | 67 |
1 files changed, 25 insertions, 42 deletions
diff --git a/libtommath/tommath_private.h b/libtommath/tommath_private.h index 3546370..057f878 100644 --- a/libtommath/tommath_private.h +++ b/libtommath/tommath_private.h @@ -13,7 +13,6 @@ #define TOMMATH_PRIV_H_ #include "tommath.h" -#include <ctype.h> #ifndef MIN #define MIN(x, y) (((x) < (y)) ? (x) : (y)) @@ -25,32 +24,26 @@ #ifdef __cplusplus extern "C" { - -/* C++ compilers don't like assigning void * to mp_digit * */ -#define OPT_CAST(x) (x *) - -#else - -/* C on the other hand doesn't care */ -#define OPT_CAST(x) - #endif /* define heap macros */ #ifndef XMALLOC /* default to libc stuff */ -# define XMALLOC malloc -# define XFREE free -# define XREALLOC realloc -# define XCALLOC calloc +# define XMALLOC(size) malloc(size) +# define XFREE(mem, size) free(mem) +# define XREALLOC(mem, oldsize, newsize) realloc(mem, newsize) #else /* prototypes for our heap functions */ -extern void *XMALLOC(size_t n); -extern void *XREALLOC(void *p, size_t n); -extern void *XCALLOC(size_t n, size_t s); -extern void XFREE(void *p); +extern void *XMALLOC(size_t size); +extern void *XREALLOC(void *mem, size_t oldsize, size_t newsize); +extern void XFREE(void *mem, size_t size); #endif +/* ---> Basic Manipulations <--- */ +#define IS_ZERO(a) ((a)->used == 0) +#define IS_EVEN(a) (((a)->used == 0) || (((a)->dp[0] & 1u) == 0u)) +#define IS_ODD(a) (((a)->used > 0) && (((a)->dp[0] & 1u) == 1u)) + /* lowlevel functions, do not call! */ int s_mp_add(const mp_int *a, const mp_int *b, mp_int *c); int s_mp_sub(const mp_int *a, const mp_int *b, mp_int *c); @@ -78,36 +71,26 @@ extern const size_t mp_s_rmap_reverse_sz; /* Fancy macro to set an MPI from another type. * There are several things assumed: - * x is the counter and unsigned + * x is the counter * a is the pointer to the MPI * b is the original value that should be set in the MPI. */ #define MP_SET_XLONG(func_name, type) \ int func_name (mp_int * a, type b) \ { \ - unsigned int x; \ - int res; \ - \ - mp_zero (a); \ - \ - /* set four bits at a time */ \ - for (x = 0; x < (sizeof(type) * 2u); x++) { \ - /* shift the number up four bits */ \ - if ((res = mp_mul_2d (a, 4, a)) != MP_OKAY) { \ - return res; \ - } \ - \ - /* OR in the top four bits of the source */ \ - a->dp[0] |= (mp_digit)(b >> ((sizeof(type) * 8u) - 4u)) & 15uL;\ - \ - /* shift the source up to the next four bits */ \ - b <<= 4; \ - \ - /* ensure that digits are not clamped off */ \ - a->used += 1; \ - } \ - mp_clamp (a); \ - return MP_OKAY; \ + int x = 0; \ + int new_size = (((CHAR_BIT * sizeof(type)) + DIGIT_BIT) - 1) / DIGIT_BIT; \ + int res = mp_grow(a, new_size); \ + if (res == MP_OKAY) { \ + mp_zero(a); \ + while (b != 0u) { \ + a->dp[x++] = ((mp_digit)b & MP_MASK); \ + if ((CHAR_BIT * sizeof (b)) <= DIGIT_BIT) { break; } \ + b >>= ((CHAR_BIT * sizeof (b)) <= DIGIT_BIT ? 0 : DIGIT_BIT); \ + } \ + a->used = x; \ + } \ + return res; \ } #ifdef __cplusplus |