diff options
Diffstat (limited to 'mpi-patches/add-mp-set-intptr')
| -rw-r--r-- | mpi-patches/add-mp-set-intptr | 77 |
1 files changed, 77 insertions, 0 deletions
diff --git a/mpi-patches/add-mp-set-intptr b/mpi-patches/add-mp-set-intptr new file mode 100644 index 00000000..a5d50a33 --- /dev/null +++ b/mpi-patches/add-mp-set-intptr @@ -0,0 +1,77 @@ +Index: mpi-1.8.6/mpi.c +=================================================================== +--- mpi-1.8.6.orig/mpi.c 2011-12-09 13:52:26.000000000 -0800 ++++ mpi-1.8.6/mpi.c 2011-12-09 13:56:19.000000000 -0800 +@@ -528,6 +528,59 @@ + + /* }}} */ + ++mp_err mp_set_intptr(mp_int *mp, int_ptr_t z) ++{ ++ if (sizeof z > sizeof (mp_digit)) { ++ int ix, shift; ++ unsigned long v = z > 0 ? z : -z; ++ const int nd = (sizeof v + sizeof (mp_digit) - 1) / sizeof (mp_digit); ++ ++ ARGCHK(mp != NULL, MP_BADARG); ++ ++ mp_zero(mp); ++ ++ if(z == 0) ++ return MP_OKAY; /* shortcut for zero */ ++ ++ s_mp_grow(mp, nd); ++ ++ USED(mp) = nd; ++ ++ for (ix = 0, shift = 0; ix < nd; ix++, shift += MP_DIGIT_BIT) ++ { ++ DIGIT(mp, ix) = (v >> shift) & MP_DIGIT_MAX; ++ } ++ ++ if(z < 0) ++ SIGN(mp) = MP_NEG; ++ ++ return MP_OKAY; ++ } ++ ++ mp_set(mp, z); ++ return MP_OKAY; ++} ++ ++/* ++ * No checks here: assumes that the mp is in range! ++ */ ++mp_err mp_get_intptr(mp_int *mp, int_ptr_t *z) ++{ ++ int_ptr_t out = 0; ++ ++#if MP_DIGIT_SIZE < SIZEOF_PTR ++ int ix; ++ int nd = USED(mp); ++ for (ix = 0; ix < nd; ix++, out <<= MP_DIGIT_BIT) ++ out = DIGIT(mp, ix); ++#else ++ out = DIGIT(mp, 0); ++#endif ++ ++ *z = (SIGN(mp) == MP_NEG) ? -out : out; ++ return MP_OKAY; ++} ++ + /*------------------------------------------------------------------------*/ + /* {{{ Digit arithmetic */ + +Index: mpi-1.8.6/mpi.h +=================================================================== +--- mpi-1.8.6.orig/mpi.h 2011-12-09 13:49:20.000000000 -0800 ++++ mpi-1.8.6/mpi.h 2011-12-09 13:56:19.000000000 -0800 +@@ -94,6 +94,8 @@ + void mp_zero(mp_int *mp); + void mp_set(mp_int *mp, mp_digit d); + mp_err mp_set_int(mp_int *mp, long z); ++mp_err mp_set_intptr(mp_int *mp, int_ptr_t z); ++mp_err mp_get_intptr(mp_int *mp, int_ptr_t *z); + + /*------------------------------------------------------------------------*/ + /* Single digit arithmetic */ |