src/usr.bin/dc/bcode.c, branch upstream/13.1.0

Make dc(1) buildable.

2018-09-19T07:08:27Z

dc(1): fix modulo operations with fractional inputs

2017-12-07T02:08:55Z

Our dc(1) has never correctly calculated remainders with fractional inputs. Both bmod and bdivmod seem to have copy/pasted code from bdiv, which results in the remainder having the wrong output scale. PR: 162495 Reported by: anonymous Reviewed by: pfg Differential Revision: https://reviews.freebsd.org/D13390

dc(1): fix input of non-decimal fractional numbers

2017-12-05T04:22:35Z

Inputting fractional non-decimal numbers has never worked correctly in our OpenBSD-derived dc(1). It truncates the input to a number of decimal places equal to the number of hexadecimal (or whatever base) places given on the input. That's unacceptable, because many numbers require more precision to represent in base 10 than in their original bases. Fix this bug by using as many decimal places as needed to represent the input, up to the maximum of the global scale factor. This has one mildly surprising side effect: the scale of a number entered in non-decimal mode will no longer necessarily equal the number of hexadecimal (or whatever base) places given on the input. I think that's an acceptable behavior change, given that inputting fractional non-decimal numbers never worked in the first place, and the man page doesn't specify whether trailing zeros on the input should affect a number's scale. PR: 206230 Reported by: nibbana@gmx.us Reviewed by: pfg Differential Revision: https://reviews.freebsd.org/D13336

bc/dc/patch: make some use of reallocarray(3).

2017-03-05T16:10:35Z

reallocarray(3) is a non portable extension from OpenBSD. Given that it is already in FreeBSD, make easier future merges by adopting in some cases where the code has some shared heritage with OpenBSD. Obtained from: OpenBSD

dc(1): Introduce e command, equivalent to p, but writes to stderr

2017-02-28T20:50:49Z

Obtained from: OpenBSD MFC after: 2 weeks

dc(1): Merge minor changes from OpenBSD.

2017-02-26T22:17:06Z

Prefer setvbuf() to setlinebuf() for portability. Some style(9) and redundant tests for NULL. These are only meant to ease up merging newer changes but we are skipping changes done in order to accomodate OpenBSD's pledge support. Obtained from: OpenBSD MFC after: 2 weeks

Sync with OpenBSD.

2014-04-16T23:14:05Z

MFC after: 2 weeks

- Use BN_set_negative() and BN_is_negative() instead of subtracting or

2012-12-30T15:20:27Z

comparing to zero. - Fix fractional number exponentiation, especially for negative exponents. Obtained from: OpenBSD

- Fix an erroneous invocation of the editline.

2012-03-15T01:43:44Z

- Fix wrong scaling in the bc.library. - Let length(0.000) conform to what gnu bc does. PR: bin/159227 Submitted by: AIDA Shinra

- Axe out signal handling code, the shell will take care of this

2010-06-10T10:28:38Z

Suggested by: jilles Approved by: delphij (mentor)