emacs/src/bignum.c, branch feature/context-menu

Update copyright year to 2021

2021-01-01T09:13:56+00:00

Run "TZ=UTC0 admin/update-copyright".

Use the full name of the null byte/character, not its abbreviation

2020-10-05T18:19:59+00:00

* lisp/subr.el (inhibit-nul-byte-detection): Make it an obsolete alias.
* src/coding.c (setup_coding_system): Use original name.
(detect_coding): Rename nul_byte_found => null_byte_found.
(detect_coding_system): Use original name.
Rename nul_byte_found => null_byte_found.
(Fdefine_coding_system_internal): Use original name.
(syms_of_coding): Rename inhibit-nul-byte-detection to
inhibit-null-byte-detection.
* src/w16select.c (get_clipboard_data): Rename nul_char to null_char.
* src/json.c (check_string_without_embedded_nulls): Rename from
check_string_without_embedded_nuls.
(Fjson_parse_string): Adjust accordingly.
* src/coding.h (enum define_coding_undecided_arg_index)
(enum coding_attr_index): Rename ...nul_byte... to ...null_byte....
* lisp/info.el (info-insert-file-contents, Info-insert-dir):
* lisp/international/mule.el (define-coding-system):
* lisp/vc/vc-git.el (vc-git--call):
* doc/lispref/nonascii.texi (Lisp and Coding Systems): Use original name.

Fix a recent change in bignum.c

2020-04-05T16:51:09+00:00

* src/bignum.c (check_int_nonnegative): Fix a recent change.
Reported by Glenn Morris .

Improve integer range checking

2020-04-05T08:24:36+00:00

* src/bignum.c (check_integer_range, check_uinteger_max)
(check_int_nonnegative): New functions.
* src/frame.c (check_frame_pixels): New function.
(Fset_frame_height, Fset_frame_width, Fset_frame_size): Use it.
* src/lisp.h (CHECK_RANGED_INTEGER, CHECK_TYPE_RANGED_INTEGER):
Remove these macros.  Unless otherwise specified, all callers
replaced by calls to check_integer_range, check_uinteger_range,
check_int_nonnegative.
* src/frame.c (gui_set_right_divider_width)
(gui_set_bottom_divider_width):
* src/nsfns.m (ns_set_internal_border_width):
* src/xfns.c (x_set_internal_border_width):
Using check_int_nonnegative means these functions no longer
incorrectly reject negative bignums; they treat them as 0,
just like negative fixnums.

Update copyright year to 2020

2020-01-01T00:59:52+00:00

Run "TZ=UTC0 admin/update-copyright $(git ls-files)".

Refactor bignum multiplication, exponentiation

2019-11-13T21:10:09+00:00

This doesn’t alter behavior, and simplifies the next commit.
* src/bignum.c (GMP_NLIMBS_MAX, NLIMBS_LIMIT, emacs_mpz_size)
(emacs_mpz_mul, emacs_mpz_mul_2exp, emacs_mpz_pow_ui): Move here ...
* src/data.c: ... from here.

Be more careful about pointers to bignum vals

2019-08-21T07:11:45+00:00

This uses ‘const’ to be better at catching bugs that
mistakenly attempt to modify a bignum value.
Lisp bignums are supposed to be immutable.
* src/alloc.c (make_pure_bignum):
* src/fns.c (sxhash_bignum):
Accept Lisp_Object instead of struct Lisp_Bignum *, as that’s
simpler now.  Caller changed.
* src/bignum.h (bignum_val, xbignum_val): New inline functions.
Prefer them to &i->value and XBIGNUM (i)->value, since they
apply ‘const’ to the result.
* src/timefns.c (lisp_to_timespec): Use mpz_t const *
to point to a bignum value.

Avoid some excess precision in time arithmetic

2019-08-21T00:36:46+00:00

* doc/misc/emacs-mime.texi (time-date):
Adjust example to match new behavior.
* etc/NEWS: Mention this.
* lisp/calendar/time-date.el (decoded-time-add)
(decoded-time--alter-second):
Don’t lose underestimate precision of seconds component.
* src/bignum.c (mpz): Grow by 1.
* src/timefns.c (trillion_factor): New function.
(timeform_sub_ps_p): Remove.
(time_arith): Avoid unnecessarily-large hz, by reducing the hz
to a value no worse than the worse hz of the two arguments.
The result is always exact unless an error is signaled.
* test/src/timefns-tests.el (timefns-tests--decode-time):
New function.
(format-time-string-with-zone): Test (decode-time LOOK ZONE t)
resolution as well as its numeric value.

Always allow at least double-precision bignums

2019-06-04T15:34:15+00:00

Without this fix, Emacs can get into a tight loop reporting
a range error when calculating timestamps.
* doc/lispref/numbers.texi (Integer Basics):
* src/alloc.c (syms_of_alloc): Document this.
* src/bignum.c (make_bignum_bits): Always allow bignums
of at least twice the width of (u)intmax_t.

Allow gap before first non-Lisp pseudovec member

2019-04-08T20:01:21+00:00

Problem reported by Keith David Bershatsky in:
https://lists.gnu.org/r/emacs-devel/2019-04/msg00259.html
Solution suggested by Stefan Monnier in:
https://lists.gnu.org/r/emacs-devel/2019-04/msg00282.html
* src/buffer.h (BUFFER_LISP_SIZE): Simplify by using PSEUDOVECSIZE.
(BUFFER_REST_SIZE): Simplify by using VECSIZE and BUFFER_LISP_SIZE.
* src/lisp.h (PSEUDOVECSIZE): Base it on the last Lisp field,
not the first non-Lisp field.  All callers changed.  Callers
without Lisp fields changed to use ALLOCATE_PLAIN_PSEUDOVECTOR.
(ALLOCATE_PLAIN_PSEUDOVECTOR): New macro.