3d2cf0d9bf
mruby-bigint/bigint.c: fix int64/uint64 conversion
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The functions were totally wrong in digit order and sign treatment. We
didn't notice since they are only called from mruby-time in the m64-i32
configuration.
2023-04-03 08:55:48 +09:00
d482eabfa2
mruby-bigint/bigint.c: int.pow(n,m) to take bigint as exponential
2023-03-31 08:26:47 +09:00
62c52d5a28
mruby-bigint/bigint.c: remove unreachable line
2023-03-30 08:18:27 +09:00
62a8ea7113
mruby-bigint/bigint.c: mrb_bint_add_d, mrb_bint_sub_d only take int
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Where mrb_bint_add and mrb_bint_sub may take float numbers.
2023-03-15 19:09:02 +09:00
9a1e6760a8
mruby-bigint: add new functions mrb_bint_add_d, mrb_bint_sub_d
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Those functions do not normalize the return value to avoid repeated
conversions between Bigints and (small) Integers.
2023-03-13 16:07:17 +09:00
f7cbb319cb
mruby-bigint: remove unused mrb_bint_div_ii() function
2023-03-13 08:10:41 +09:00
dd0a9e8970
mruby-bigint/bigint.c: remove a condition to stop warnings
2023-03-13 08:06:41 +09:00
01233f70bd
mruby-bigint/bigint.c: add two new functions to convert to 64bit int
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- mrb_bint_as_int64()
- mrb_bint_as_uint64()
2023-03-10 08:52:05 +09:00
a3b84fbb08
mruby-bigint/bigint.c: add 2 new functions for 64 bit integer
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- mrb_bint_new_int64()
- mrb_bint_new_uint64()
2023-03-10 08:52:05 +09:00
bcd595ad1b
mruby-bigint/bigint.c: add else to skip if check
2023-03-10 08:52:04 +09:00
8eee3ce150
docs: fix start of C code block
2022-12-06 21:48:28 +10:00
9c5dc42e59
small cosmetic changes.
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I prefer `i++` style unless absolutely necessary.
This commit is an addition to 41e4148.
2022-11-19 17:11:56 +09:00
7e7cc425d4
bingint.c: add cast to silence some warnings (on VC).
2022-11-04 13:10:51 +09:00
5ccca7e45b
mruby-bigint/bigint.c (udiv): skip loop if xd<yd.
2022-10-28 17:01:46 +09:00
604d7e9c86
mruby-bigint/bigint.c (mpz_mul_2exp): move mpz_clear() call.
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No need to call mpz_clear() after mpz_move().
2022-10-28 15:36:34 +09:00
8f0dba2985
Add examples/mrbgems/mruby-YOUR-bigint
2022-10-10 14:12:53 +09:00
b7069dba41
Small improves for mrbgems/mruby-bigint/README.md [ci skip]
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- Add a period at the end of the line because markdown will combine lines if there are no blank lines.
- Enable link to `README-fgmp.md`.
2022-09-21 22:50:47 +09:00
f5a3f4f2ea
bigint.c (mpz_powm): avoid stack allocations.
2022-08-26 14:27:54 +09:00
b158581118
bigint.c (udiv): xx%yy should have been xx when xx<yy.
2022-08-26 14:19:10 +09:00
4e0da4f0d8
bigint.c (mpz_init_set): fully initialize mpz_t first.
2022-08-26 14:18:30 +09:00
62c36c03b3
bigint.c (mpz_set_int): fixed a bug in integer size check.
2022-08-26 12:55:29 +09:00
b4785044d5
bigint.c (mrb_bint_powm): fix a return value bug.
2022-08-26 12:13:24 +09:00
ef1974099d
bigint.c (mrb_bint_powm): check zero division first.
2022-08-26 12:10:22 +09:00
993c388cce
bigint.c (mrb_bint_idiv): remove unused function.
2022-08-16 15:45:54 +09:00
a7c3d59971
kernel.c (mrb_obj_hash): generate hash value for big-integers.
2022-08-06 06:43:41 +09:00
62a35e502b
bigint.c: rename double sized mp_limb.
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- mp_limb2 -> mp_dbl_limb
- mp_limb2s -> mp_dbl_limb_signed
2022-08-06 06:43:41 +09:00
1718d9bafb
bigint.c: add type cast to mp_limb.
2022-08-06 06:43:40 +09:00
b7bc326b4c
bigint.c (mpz_set_int): check mp_limb overflow from mrb_int.
2022-08-06 06:43:40 +09:00
441c6ea30d
bigint.c (udiv): check out of bound memory access.
2022-08-02 13:36:36 +09:00
569a8910af
bigint.c: check division by zero errors.
2022-08-01 13:58:05 +09:00
aebf75fed4
bigint.c (mrb_bint_as_int): change overflow message.
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From "integer too big" to "integer out of range" because the integer can
be too small if it's negative.
2022-07-30 08:58:30 +09:00
6da34fa735
numeric.c (int_div): add checks for division by zero.
2022-07-29 17:48:02 +09:00
387f383eeb
bigint.c (mrb_sizeinbase): cast to remove a signedness warning.
2022-07-29 10:26:04 +09:00
5df3f8221d
bigint.c (lzb): check x==0 before calling clz().
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In theory, we should not call lzb() with 0, and we assume checks are
done before calling it. But we got a report that we call lzb(0) in some
use-case. We could not reproduce the issue, so we add this guard.
2022-07-29 10:24:41 +09:00
23cb2a73ff
bigint.c (mpz_move): reduce copying of digits arrays.
2022-07-29 10:24:41 +09:00
de2ea3c389
bigint.c (udiv): avoid integer underflow.
2022-07-28 15:07:22 +09:00
25a32ed681
bigint.c (ulshift,urshift): check uzero before actual shifting.
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Bit-shifting zero always result in zero.
2022-07-26 15:06:06 +09:00
97b9bfc4fa
bigint.c (mpz_init_set_str): move negative trick to mrb_bint_new_str().
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It used to take negative base to generate negative value. But this weird
trick is now belong to the mruby API side.
2022-07-26 15:03:52 +09:00
26ce85bd5d
bigint.c (ucmp): fixed error with zero length zero value.
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Big integers have two kind of zero values:
- digits in `p` array are all zeros
- length `sn` is zero
The old code crashed with the latter zero.
2022-07-26 00:13:15 +09:00
d2d105b589
bigint.c (mpz_get_int): should work with zero (i.e. y->p == NULL).
2022-07-25 14:54:41 +09:00
6a4c8e36b5
bigint.c (udiv): should trim remainder before bit shifting.
2022-07-25 14:54:41 +09:00
e02e9ae434
bigint.c (mpz_mmod): should call mpz_clear() for internal mpz_t.
2022-07-25 14:54:41 +09:00
7d5475916c
bigint.c (udiv): avoid out of bound access in division.
2022-07-25 14:54:40 +09:00
657263446e
bigint.c: cosmetic changes (add spaces, etc.)
2022-07-25 14:54:40 +09:00
199758c0b9
bigint.c (mpz_sizeinbase): should return size_t instead of int.
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`int` may overflow.
2022-07-25 10:58:02 +09:00
e04184185a
bigint.c: heavy restructuring of big-integers.
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Instead of splitting mp_limb by bit operations (using HIGH/LOW macros),
now we use mp_limb2 (which is bigger integer size, e.g uint64_t). It
makes operations (especially mulitiplication) a lot faster. As a side
effect, it also reduces memory consumption (16,452,033 -> 15,545,853 on
my Linux machine).
Other changes:
- trailing zeros are removed after operations.
- division algorithm is simplified.
2022-07-23 07:50:30 +09:00
c0a636c007
mruby-os-memsize/memsize.c: add up digit spaces for big-integers.
2022-07-21 20:56:32 +09:00
8bd1c56465
bigint.c (mpz_get_str): fixed wrong loop termination condition.
2022-07-21 20:40:35 +09:00
450382735b
bigint.c (mrb_bint_to_s): shortcut for bigint zero.
2022-07-20 14:40:45 +09:00
a4ce63abc5
bigint.c (mpz_sizeinbase): check zero length bigint.
2022-07-20 14:40:12 +09:00
Yukihiro "Matz" Matsumoto