Fractions of the form 123⁄456 are handled as if written 123:456. Note
in particular the difference in behavior from U+2215 DIVISION SLASH
and U+002F SOLIDUS, which result in division rather than a rational
fraction.
* lisp/calc/calc-aent.el (math-read-replacement-list): Substitute a
colon for any fraction slash. (Bug#66944)
* test/lisp/calc/calc-tests.el (calc-frac-input): Test various
fraction types.
* etc/NEWS:
* doc/misc/calc.texi (Fractions): Mention fraction slash, precomposed
fractions.
Copyright-paperwork-exempt: yes
`math-read-preprocess-string` is one of the bottlenecks of `calc-eval`
and was unnecessarily slow even with no substitutions made.
This affected org-mode in particular, where `calc-eval` is called
repeatedly to recalculate tables.
Reported by Raffael Stocker who also wrote the unit tests here.
* lisp/calc/calc-aent.el (math--read-preprocess-re-cache): New.
(math-read-preprocess-string):
Use math--read-preprocess-re-cache, first computing it if necessary.
* test/lisp/calc/calc-tests.el (calc-math-read-preprocess-string):
New test.
* test/lisp/calc/calc-tests.el:
* test/lisp/progmodes/python-tests.el: Remove redundant local
variables.
* test/src/coding-tests.el: Pacify byte-compiler without using local
variable.
Reported by Iñaki Cornejo.
* lisp/calc/calc-math.el (math-nth-root-float):
Fix old refactoring mistake.
* test/lisp/calc/calc-tests.el (calc-nth-root): New test.
Calc normally displays a trailing decimal point for floats with no
fractional part, like '12.'. Some uses require at least one digit
after the point; add the governing variable calc-digit-after-point.
* lisp/calc/calc.el (calc-digit-after-point): New variable.
(math-format-number): Use it.
* test/lisp/calc/calc-tests.el (calc-display-digit-after-point):
New test.
Fix incorrect variable scoping in `let*`, `for` and `foreach`.
Fix loop variable value in `foreach` (should be element, not tail).
Fix function quoting, as in ('cons x y) -- didn't work at all.
Reported by Stephan Neuhaus.
* lisp/calc/calc-prog.el (math-define-exp, math-handle-foreach):
* test/lisp/calc/calc-tests.el: (var-g, test1, test2, test3, test4)
(test5, test6, test7, calc-defmath): Test various defmath forms.
Setting the word size ("b w") to 0 removes the word size clipping for
all bit operations (effectively as if a word size of -∞ had been set).
Rotation is disallowed; logical and arithmetic shifts behave
identically.
After a suggestion by Vincent Belaïche.
* lisp/calc/calc-bin.el (calc-word-size, math-binary-arg)
(math-binary-modulo-args, calcFunc-lsh, calcFunc-ash, calcFunc-rot)
(math-clip, math-format-twos-complement): Allow a word size of 0,
meaning -∞.
* test/lisp/calc/calc-tests.el
(calc-tests--not, calc-tests--and, calc-tests--or, calc-tests--xor)
(calc-tests--diff): New functions.
(calc-tests--clip, calc-tests--rot, calc-shift-binary): Extend to
cover word size 0.
(calc-bit-ops): New test.
* doc/misc/calc.texi (Binary Functions): Update manual.
* etc/NEWS: Announce the change.
Make the '/' precedence higher than that of '+' and '-' again,
partially reverting fda9b316f8 (bug#43902).
* lisp/calc/calc-lang.el (tex): Change precedence of '/'.
* test/lisp/calc/calc-tests.el (calc-latex-input): New test.
Arithmetic right shift didn't compute the bit to shift in correctly.
For example, #x600000000 right-shifted 8 steps (with 32 bit word size)
resulted in #xff000000 rather than 0. (Bug#43764)
* lisp/calc/calc-bin.el (calcFunc-ash): Fix condition.
* test/lisp/calc/calc-tests.el (calc-tests--clip, calc-tests--lsh)
(calc-tests--rsh, calc-tests--ash, calc-tests--rash, calc-tests--rot):
New.
(calc-shift-binary): New test.
The number of days from epoch to Jan 1, 1970 that was used in parsing
and formatting Unix time was incorrect. The previous fix
(in e368697ce3) was incomplete.
Reported by Vincent Belaïche.
* lisp/calc/calc-forms.el (math-unix-epoch): New constant.
(math-format-date-part, math-parse-standard-date, calcFunc-unixtime):
Use math-unix-epoch instead of a constant that is sometimes wrong.
* test/lisp/calc/calc-tests.el (calc-unix-date): New test.
The calculation of business days was broken in 2012 (probably
310e60d945 or thereabouts) when the date representation changed
epoch so that Jan 1, 1 AD became day number 1 instead of 0. Repair
this, along with an unrelated bug that prevented arbitrary holiday
weekdays from working.
Reported by Aaron Zeng.
* lisp/calc/calc-forms.el (math-to-business-day)
(math-from-business-day): Correct calculation of weekdays using Calc's
current (Rata Die) chronology. Modify loop condition to cope with odd
sets of holiday weekdays.
* test/lisp/calc/calc-tests.el (calc-business-days): New test.
For some values outside integers 0≤k≤n, (n choose k) gave wrong
results, entered infinite recursion or used unreasonably amounts of
stack space. This change fixes that and extends the function to all
integer arguments using the definitions from M. J. Kronenburg
(https://arxiv.org/abs/1105.3689).
* lisp/calc/calc-comb.el (calcFunc-choose):
Fix sign error to prevent infinite recursion and extend function to
handle all integer arguments.
(math-choose-iter, math-choose-float-iter): Rewrite in iterative form;
no TCO in elisp yet.
* test/lisp/calc/calc-tests.el (calc-tests--fac, calc-tests--choose)
(calc-tests--check-choose, calc-tests--explain-choose)
(calc-tests--calc-to-number): New helper functions.
(calc-choose): New test.
Computing determinant and inverse for on some matrices containing
non-numeric elements failed or gave the wrong result.
Reported by Mauro Aranda.
* lisp/calc/calc-mtx.el (math-do-matrix-lud): Don't use zero as pivot.
* test/lisp/calc/calc-tests.el (calc-matrix-determinant): New test.
Make Math-num-integerp return false for nil, following Math-integerp
which was changed in the bignum reform. This fixes a crash in
calc-graph-fast.
Reported by Narendra Joshi.
* lisp/calc/calc-macs.el (Math-num-integerp): Not true for nil.
* test/lisp/calc/calc-tests.el (calc-Math-integerp): New tests.
* lisp/calc/calc-alg.el (math-simplify-only, calc-simplify-mode)
(math-expand-formulas, calc-poly-div-remainder)
(math-living-dangerously, math-simplifying, calc-angle-mode)
(calc-prefer-frac, math-poly-base-variable):
Declare dynamic variables.
* test/lisp/calc/calc-tests.el (calc-poly-div):
Add test for at least one bug caused by missing declarations.
* lisp/calc/calcalg2.el (math-try-solve-for):
To solve Ax^n=0 where A is a nonzero constant and x the variable to
solve for, solve x^n=0 instead of solving A=0 (which obviously fails)
or something equally stupid.
* test/lisp/calc/calc-tests.el (calc-test-solve-linear-system): New.
* lisp/calc/calc-forms.el (math-absolute-from-gregorian-dt):
Rewrite in a way that I understand, and that actually seems to work.
(math-absolute-from-julian-dt): Use Julian, not Gregorian, leap year
rules for counting days within a year.
(math-julian-date-beginning, math-julian-date-beginning-int):
Change constants to be consistent with their doc strings and the code:
use Rata Die epoch at Dec 31, 1 BC Gregorian proleptic, not Julian.
* doc/misc/calc.texi (Date Forms): Correct difference between Julian
Day and Rata Die.
* test/lisp/calc/calc-tests.el (calc-test-calendar): New test.
The functions math-format-hex and math-format-octal were not
implemented, yet called, leading to a crash when using hex or octal
radix with digit grouping.
* test/lisp/calc/calc-tests.el (calc-test-format-radix): New test.
* lisp/calc/calc-ext.el: Don't declare non-existing functions.
(math--format-integer-fancy): Don't call non-existing functions.
* lisp/calc/calc-bin.el (math-format-binary, math-binary-digits):
Simplify, fixing 0-padding bug.
* lisp/calc/calc-alg.el (calcFunc-sec, calcFunc-csc, calcFunc-cot):
Check that `math-known-sin' and `math-known-tan' succeeded before
using their value in arithmetic.
* test/lisp/calc/calc-tests.el (calc-test-trig): Add regression tests.
Most of this change is to boilerplate commentary such as license URLs.
This change was prompted by ftp://ftp.gnu.org's going-away party,
planned for November. Change these FTP URLs to https://ftp.gnu.org
instead. Make similar changes for URLs to other organizations moving
away from FTP. Also, change HTTP to HTTPS for URLs to gnu.org and
fsf.org when this works, as this will further help defend against
man-in-the-middle attacks (for this part I omitted the MS-DOS and
MS-Windows sources and the test tarballs to keep the workload down).
HTTPS is not fully working to lists.gnu.org so I left those URLs alone
for now.
Don't use the angle mode, use the angle units included
in the expression instead (Bug#23889).
* lisp/calc/calc-alg.el (calc-input-angle-units): New defun.
(math-simplify): Use it.
* lisp/calc/calc-forms.el (math-to-hms, math-from-hms):
Don't use calc-angle-mode if math-simplifying-units is non-nil.
* lisp/calc/calc-math.el (calcFunc-nroot, math-from-radians)
(math-to-radians-2, math-from-radians-2): Don't convert angle
to radians if math-simplifying-units is non-nil.
* test/lisp/calc/calc-tests.el (test-calc-23889): Add test.
