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* Do not leave COBJ-ified mp_int uninitialized.Kaz Kylheku2016-06-081-0/+5
| | | | | | | | | | | | | | | Here we ensure that the digits pointer of an uninitialized mp_int is nulled out. The garbage collector could conceivably encounter such an object, in which case mp_clear will then try to free a garbage pointer. This could happen if an exception is thrown out of numeric code due to low memory, interrupting its execution, leaving behind an unfilled object produced by make_ubignum. * arith.c (make_ubignum): Perform minimal initialization of the mp_int using new function. * mpi/mpi.h (mp_init_minimal): New inline function.
* Functions for converting between buffers and integers.Kaz Kylheku2016-02-261-0/+1
| | | | | | | | | | | | | | | | | These functions convert between positive integers, and fixed-size memory buffers representing pure binary numbers in big endian byte order. This functionality will be used in some upcoming networking code. * arith.c (num_from_buffer, num_to_buffer): New functions. * arith.h (num_from_buffer, num_to_buffer): Declared. * mpi/mpi.c (mp_to_unsigned_buf): New function. * mpi/mpi.h (mp_to_unsigned_buf): Declared.
* Reduce header pollution caused by mpi.h.Kaz Kylheku2016-01-221-6/+0
| | | | | | | | | | | | | * eval.c: include <assert.h> that was previously coming via "mpi.h". * mpi/mpi.c: Includes of <stdio.h>, <ctype.h> and <assert.h> moved here. * mpi/mpi.h: Remove include of <stdio.h>, <ctype.h> and <assert.h>. Keeping <limits.h> for now; needed for CHAR_BIT. * mpi/mplogic.c: Needs <assert.h>
* New random-state-get-vec function.Kaz Kylheku2016-01-181-0/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | * arith.c (UINT_PTR_MAX_MP): New static variable. (biggnum_from_uintptr): New function. (in_uint_ptr_range): New static function. (c_uint_ptr_num): New function. (arith_init): Initialize UINT_PTR_MAX_MP. * arith.h (bignum_from_uintptr, c_uint_ptr_num): Declared. * eval.c (eval_init): Register random-state-get-vec. * mpi/mpi.c (mp_set_uintptr, mp_get_uintptr): New functions. (mp_set_intptr, mp_get_intptr): Expressed in terms of mp_set_uintptr and mp_get_uintptr. * mpi/mpi.h (mp_set_uintptr, mp_get_uintptr): Declared. * rand.c (make_random_state): Handle vector seed. (random_state_get_vec): New function. * rand.h (random_state_get_vec): Declared. * txr.1: Documented new feature in make-random-state and new random-state-get-vec function.
* random: wrong mask width for power-of-two moduli.Kaz Kylheku2016-01-181-0/+1
| | | | | | | | | | | | | | | | | | | | | | | This mistake causes wasteful behavior for power-of-two moduli in the random function, in both the bignum and fixnum cases. For instance, the modulus 16 is taken to be 17 bits wide. But we really want the width 16: the number of bits needed for values in the range [0, 16). The result isn't wrong, but the loop generates 17-bit random numbers, and then throws away those which equal or exceed the modulus, which is wasteful. * mpi/mpi.c (mp_is_pow_two): New function. * mpi/mpi.h (mp_is_pow_two): Declared. * rand.c (random): In bignum case, after counting bits in the modulus, subtract 1 if the modulus is a power of two. In the fixnum case, subtract 1 from the modulus and then count the bits in the reduced value. * tests/013/maze.expected: regenerate due to different prng behavior.
* Remove include guards from MPI headers.Kaz Kylheku2015-08-151-5/+0
| | | | | * mpi/mpi-config.h, mpi/mpi.h: These headers do not require include guards. They included only once.
* add-bitops patchKaz Kylheku2015-04-221-0/+13
| | | | | | | | | | | Adding bit operations to MPI. * mpi/mpi.c (MAX, MIN): New macros. (mp_2comp, mp_and, mp_or, mp_xor, mp_comp, mp_trunc, mp_shift, mp_bit): New functions. * mpi/mpi.h (mp_2comp, mp_and, mp_or, mp_xor, mp_comp, mp_trunc, mp_shift, mp_bit): Declared.
* mpi-to-double patchKaz Kylheku2015-04-221-0/+5
| | | | | | * mpi/mpi.c (mp_to_double): New function. * mpi/mpi.h (mp_to_double): Declared.
* shrink-mpi-int patchKaz Kylheku2015-04-221-0/+5
| | | | | | * mpi/mpi.h (mp_int): Depending on the relative size of int and pointers, turn the sign and alloc fields into bitfields, so that the structure is three words wide and therefore fits into a TXR obj_t heap object.
* mpi-set-double-intptr patchKaz Kylheku2015-04-221-0/+3
| | | | | | * mpi/mpi.c (mp_set_double_intptr): New function. * mpi/mpi.h (mp_set_double_intptr): Declared.
* mpi-set-mpi-word patchKaz Kylheku2015-04-221-0/+1
| | | | | | * mpi/mpi.c (mp_set_word): New function. * mpi/mpi.h (mp_set_word): Declared.
* add-mpi-toradix-with-case patchKaz Kylheku2015-04-221-0/+1
| | | | | | | | * mpi/mpi.c (mp_toradix_case): New function based on mp_toradix. Takes an argument whether to use lower case digits. (mp_toradix): Reduced to wrapper for mp_toradix_case. * mpi/mpi.h (mp_toradix_case): Declared.
* add-mp-hash patchKaz Kylheku2015-04-221-0/+2
| | | | | | * mpi/mpi.c (mp_hash): New function. * mpi/mpi.c (mp_hash): Declared.
* export-mp-eq patchKaz Kylheku2015-04-221-0/+4
| | | | | | * mpi/mpi.c (MP_LT, MP_EQ, MP_GT): Preprocessor symbols removed. * mpi/mpi.h (MP_LT, MP_EQ, MP_GT): Preprocessor symbols added.
* add-mp-set-intptr patchKaz Kylheku2015-04-221-0/+2
| | | | | | * mpi/mpi.c (mp_set_intptr, mp_get_intptr): New functions. * mpi/mpi.h (mp_set_intptr, mp_get_intptr): Declared.
* Bringing MPI library out of tarball into GIT.Kaz Kylheku2015-04-221-0/+221
Importing 1.8.6 upstream baseline, minus unwanted stuff.
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