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Some folks might think: “you still use RCS”?!? And we will say, hey, at least we switched from SCCS to RCS back in … I think it was around 1994 ... at least we are keeping up! :-) :-) :-) Logs say that SCCS version 18 became RCS version 19 on 1994 March 18. RCS served us well. But now it is time to move on. And so we are switching to git. Calc releases produce a lot of file changes. In the 125 releases of calc since 1996, when I started managing calc releases, there have been 15473 file mods!
79 lines
2.3 KiB
Plaintext
79 lines
2.3 KiB
Plaintext
NAME
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register - set or print a custom register value
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SYNOPSIS
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custom("register", regnum[, value])
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TYPES
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regnum int
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value any, &any
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return any
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DESCRIPTION
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This custom function reads or sets a value of a custom register.
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A custom register can hold any calc value.
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Without a value arg, the register value is return. With a value
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arg, the register is set with that value and the previous value
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is returned.
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The number of custom registers is defined at compile time.
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There will be at least 32 registers although there could be more
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added in the future. It may be deterimed by:
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custom("sysinfo", "REGNUM_MAX")
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The custom registers are initialized to 0 by the internal
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function libcalc_call_me_first() during calc startup.
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This custom interface is intented to make it easier to interface
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with special purpose hardware.
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EXAMPLE
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> custom("register", 3)
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0
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> custom("register", 3, 45)
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0
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> custom("register", 3)
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45
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> custom("register", 7, 2i),
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> custom("register", 8, 3i),
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> custom("register", 7) * custom("register", 8)
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-6
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LIMITS
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calc must be built with ALLOW_CUSTOM= -DCUSTOM
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calc must be executed with a -C arg.
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The regnum numbe bee an integer >= 0 and < REGNUM_MAX where
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REGNUM_MAX is a compile time constant that is >= 32.
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LIBRARY
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none
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SEE ALSO
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custom
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## Copyright (C) 2007 Landon Curt Noll
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##
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## Calc is open software; you can redistribute it and/or modify it under
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## the terms of the version 2.1 of the GNU Lesser General Public License
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## as published by the Free Software Foundation.
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##
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## Calc is distributed in the hope that it will be useful, but WITHOUT
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## ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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## or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General
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## Public License for more details.
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##
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## A copy of version 2.1 of the GNU Lesser General Public License is
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## distributed with calc under the filename COPYING-LGPL. You should have
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## received a copy with calc; if not, write to Free Software Foundation, Inc.
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## 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
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##
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## Under source code control: 2005/02/04 22:39:50
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## File existed as early as: 2005
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##
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## chongo <was here> /\oo/\ http://www.isthe.com/chongo/
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## Share and enjoy! :-) http://www.isthe.com/chongo/tech/comp/calc/
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