--- /dev/null
+#!/usr/bin/perl
+
+# DCT - desktop calculator thingy
+
+# reverse polish notition calculator using curses
+# by Shiar <shiar.org>
+
+# 1.01 06-18 - start (curses, some basic commands)
+# 1.02 06-20 - function keys select command/submenu from (sub)menu
+# - backspace to undo last digit
+# 1.03 06-25 - values displayable in arbitrary base
+# - can enter fractions (.) and negative values (_)
+# 1.04 08-04 14:45 - error dialog (don't mess up screen)
+# - manual command input using capital letters
+# - ^L redraws screen
+# pre 09-09 22:00 - overhaul in stack handling
+# 1.05 09-10 19:45 - hp48-like drop (backspace but not editing value)
+# - error on insufficient arguments for command
+# - command backspacing
+# - some unit conversion (mostly lengths) from menu
+# - q for sq(rt) (formerly quit, now only ^D/quit)
+# 1.06 09-15 23:10 - menu contents in module
+# - new commands: a?(sin|cos|tan)h, inv, !, rand
+# - x and v shortkeys
+# 1.07 09-24 23:50 - numeric modifiers hardcoded instead of in action hash
+# - action undo: last stack alteration can be undone
+# - enter on no value repeats last val on stack
+# - new commands: sr/sr, shortkeys ( )
+# 1.08 09-26 22:10 - additional digits were not correctly applied to negative values
+# - negative numbers displayed correctly in different bases
+# - second undo redoes
+# - fixed %
+# - stack command (cursor up) cycles through values in stack
+# 09-27 00:57 - all key aliases moved to module DCT::Bindings
+our $VERSION = 1.008;
+
+use strict;
+use warnings;
+use utf8;
+
+use Term::ReadKey;
+use Curses;
+use DCT::Menu 1.006;
+use DCT::Bindings 1.008;
+
+initscr;
+ReadMode 3; # cbreak mode
+END {
+ ReadMode 0;
+ endwin;
+} # restore terminal on quit
+
+my %val = qw(i 0 frac 0); # i, frac
+my @stack;
+my %var;
+
+my %set = (
+ base => 10, # decimal; set using commands bin/oct/dec/hex/base
+ numb => 0, # fixed scientific engineering
+ card => 1, # degrees radians grades
+ coord => 0, # cartesian polar spherical
+ complex => 0, # real complex
+
+ height => $LINES<3 ? 4 : $LINES-3, # stack depth (lines of stack plus one)
+ width => $COLS || 42, # limit value precision, stetch menu
+ menushow => 12, # menu items to show simultaneously
+); # %set
+
+#%alias = (' '=>'enter', "\004"=>'quit', 'q'=>'quit') unless %alias; # rudimentary defaults
+
+my @menu = @{$menus[0]};
+my $menumin = 0;
+
+my %action = (
+ 'more' => [-1, sub {
+ $menumin += $set{menushow};
+ $menumin = 0 if $menumin>=$#menu;
+ showmenu();
+ }], # tab
+ 'chs' => [0, sub {$stack[0] = -$stack[0]}], # negative
+
+ 'drop' => [0, sub {shift @stack}], # backspace
+ 'clear'=> [0, sub {@stack = (); %val = (i=>undef, frac=>0) }], # clear all #todo: if (val{i}) delete char after cursor
+
+ 'enter'=> [0, sub {
+ unshift @stack, defined $val{i} ? $val{i} : $stack[0];
+ %val = (i=>undef, frac=>0);
+ }], # duplication
+
+# 'undo' => [0, sub {@stack = @{ $var{undo} }}], # undo
+ 'undo' => [0, sub {($var{undo}, @stack) = ([@stack], @{ $var{undo} }) }], # undo
+ 'swap' => [1, sub {@stack[0, 1] = @stack[1, 0]}], # swap x<->y
+ 'stack'=> [0, sub {
+ $var{stackpos} = 0 unless $var{stackpos}; # initialize
+ $var{stackpos} %= @stack; # cycle
+ $val{i} = $stack[$var{stackpos}++];
+ }], # stack
+
+ 'version' => [0, sub{error("Desktop Calculator Thingy $VERSION by Shiar")}], # version
+
+ '=' => [1, sub {$var{a} = $stack[0]}], # copy
+ '?' => [1, sub {$var{a} = shift @stack}], # assign
+
+ '+' => [2, sub {$stack[1] += shift @stack}], # addition
+ '-' => [2, sub {$stack[1] -= shift @stack}], # substraction
+ '*' => [2, sub {$stack[1] *= shift @stack}], # multiplication
+ '/' => [2, sub {$stack[1] /= shift @stack}], # division
+ 'mod' => [2, sub {$stack[1] %= shift @stack}], # modulo
+
+ 'inv' => [1, sub {$stack[0] = 1 / $stack[0]}], # 1/x
+ 'sqrt' => [1, sub {$stack[0] = sqrt $stack[0]}], # square root
+ 'sq' => [1, sub {$stack[0] *= $stack[0]}], # squared
+ '^' => [2, sub {$stack[1] **= shift @stack}], # exponentiation
+ 'xroot'=> [2, sub {$stack[1] **= 1 / shift @stack}], # x-root of y
+
+ 'log' => [1, sub {$stack[0] = log($stack[0]) / log(10)}], # logarithm
+ 'alog' => [1, sub {$stack[0] = 10 ** $stack[0]}], # 10^x
+ 'ln' => [1, sub {$stack[0] = log $stack[0]}], # natural logaritm
+ 'lnp1' => [1, sub {$stack[0] = log($stack[0]+1)}], # ln(x+1)
+ 'exp' => [1, sub {$stack[0] = exp($stack[0])}], # e^x
+ 'expm' => [1, sub {$stack[0] = exp($stack[0])-1}], # exp(x)-1
+
+ 'sin' => [1, sub {$stack[0] = sin $stack[0]}], # sine
+ 'asin' => [1, sub {$stack[0] = atan2($stack[0], sqrt(1 - $stack[0]*$stack[0]))}], # inverse sine
+ 'cos' => [1, sub {$stack[0] = cos $stack[0]}], # cosine
+ 'acos' => [1, sub {$stack[0] = atan2(sqrt(1 - $stack[0]*$stack[0]), $stack[0])}], # inverse cosine
+ 'tan' => [1, sub {$stack[0] = sin($stack[0]) / cos($stack[0])}], # tangent
+# 'atan' => [1, sub {}], # arctangent
+
+ 'sinh' => [1, sub {$stack[0] = ( exp($stack[0]) - exp(-$stack[0]) )/2}], # hyperbolic sine
+ 'cosh' => [1, sub {$stack[0] = ( exp($stack[0]) + exp(-$stack[0]) )/2}], # hyperbolic cosine
+ 'tanh' => [1, sub {$stack[0] = ( exp($stack[0]) - exp(-$stack[0]) )/( exp($stack[0]) + exp(-$stack[0]) )}], # hyperbolic tangent (sinh/cosh)
+ 'asinh'=> [1, sub {$stack[0] = log( sqrt($stack[0]**2+1)+$stack[0] )}], # inverse hyperbolic sine
+ 'acosh'=> [1, sub {$stack[0] = log( sqrt($stack[0]**2-1)+$stack[0] )}], # inverse hyperbolic cosine
+ 'atanh'=> [1, sub {$stack[0] = log( (1+$stack[0]) / (1-$stack[0]) )/2}], # inverse hyperbolic tangent
+
+ '%' => [2, sub {$stack[0] = shift(@stack)/$stack[0]}], # percentage
+ '%ch' => [2, sub {$val{i} = 100*(shift(@stack)-$val{i})/$val{i}}], # percentage change
+ '%t' => [2, sub {$val{i} = 100*$val{i}/shift(@stack)}], # percentage total
+
+ 'and' => [2, sub {$stack[1] &= shift @stack}], # bitwise and
+ 'or' => [2, sub {$stack[1] |= shift @stack}], # bitwise or
+ 'xor' => [2, sub {$stack[1] ^= shift @stack}], # bitwise xor
+ 'not' => [2, sub {$stack[0] = ~$stack[0]}], # bitwise not
+ 'sl' => [1, sub {$stack[0] *= 2}], # shift left
+ 'sr' => [1, sub {$stack[0] /= 2}], # shift right
+
+ 'abs' => [1, sub {$stack[0] = abs $stack[0]}], # absolute #todo
+ 'sign' => [1, sub {$stack[0] = $stack[0] <=> 0}], # sign
+ 'ip' => [1, sub {$stack[0] = int $stack[0]}], # integer part
+ 'fp' => [1, sub {$stack[0] -= int $stack[0]}], # fractional part
+
+ 'rnd' => [1, sub {local $_ = 10**shift @stack; $val{i} = int(($val{i}+.5)*$_)/$_}], # round
+ 'trnc' => [1, sub {local $_ = 10**shift @stack; $val{i} = int($val{i}*$_)/$_}], # truncate
+ 'floor'=> [1, sub {$stack[0] = int $stack[0]}], # floor
+ 'ceil' => [1, sub {$stack[0] = int $stack[0]+.9999}], # ceil
+
+ 'min' => [2, sub {local $_ = shift @stack; $stack[0] = $_ if $_<$stack[0] }], # minimum
+ 'max' => [2, sub {local $_ = shift @stack; $stack[0] = $_ if $_>$stack[0] }], # maximum
+
+ 'dec' => [0, sub {$set{base} = 10}], # decimal
+ 'bin' => [0, sub {$set{base} = 2}], # binary
+ 'oct' => [0, sub {$set{base} = 8}], # octal
+ 'hex' => [0, sub {$set{base} = 16}], # hexadecimal
+ 'base' => [1, sub {$set{base} = shift @stack}], # alphanumerical
+
+ '!' => [1, sub {local $_ = $stack[0]; $stack[0] *= $_ while --$_>1}], # factor
+ 'rand' => [0, sub {unshift @stack, rand}], # random value <1
+); # %action
+
+my %unit;
+{
+my $i = 0;
+$unit{$_->[0]} = { name=>$_->[0], type=>$i, val=>$_->[1] } for map {$i++; @$_} (
+ [
+ ['m', 1],
+ ['cm', .01],
+ ['mm', .001],
+ ['km', 1000],
+ ['ft', .3048],
+ ['in', .0254],
+ ['yd', .9144],
+ ['mile', 1609.344],
+ ['nmile', 1852],
+ ['lyr', 9.46052840488e+15],
+ ['mil', 2.54e-5],
+ # _m _cm _mm _yd _ft _in _Mpc _pc _lyr _au _km _mi
+ # _nmi _miUS _chain _rd _fath _ftUS _Mil _μ _Å _fermi
+ ], # lengths
+ [
+ ['m^3', 1],
+ ['cm^3', 1e-6],
+ ['ft^3', .028316846592],
+ ['in^3', 1.6387064e-5],
+ ], # volume
+);
+} # create unit table
+
+
+sub error($) {
+ attron(A_REVERSE);
+ addstr(0, 0, shift);
+ attroff(A_REVERSE);
+ clrtoeol;
+ refresh;
+
+ ReadKey; # wait for confirm
+ 1 while defined (ReadKey -1); # clear key buffer
+} # error
+
+sub showval($$);
+sub showval($$) {
+ my ($val, $base) = @_;
+ return '' unless defined $val;
+ return $val if $base==10;
+
+ my $sign = $val<0;
+ $val = abs $val;
+ my $int = int $val;
+ my $frac = $val-$int;
+ my $exp = 0;
+
+ my $txt = '';
+
+ while ($int>$base**10) {
+ $int /= $base;
+ $exp++;
+ } # exponent part
+ while ($int>=1) {
+ my $char = $int%$base;
+ $txt = ($char<10 ? $char : chr($char+55)).$txt;
+ $int /= $base;
+ } # integer part
+
+ $txt .= '.' if $frac>0;
+ for (my $i = 0; length $txt<$set{width}-2 && $frac>0; $i++) {
+ $frac *= $base;
+ my $char = int $frac;
+ $frac -= $char;
+ $txt .= $char<10 ? $char : chr($char+55);
+ } # fraction part
+
+ $txt = "-".$txt if $sign;
+ $txt .= 'e'.showval($exp, $base) if $exp;
+
+ return $txt;
+} # showval
+
+sub showstack() {
+ for (0..@stack-1) {
+ addstr($set{height}-$_, 1, "$_: ".showval($stack[$_], $set{base}));
+ clrtoeol;
+ } # show stack
+ clrtoeol($set{height}-$#stack-1, 1);
+} # showstack
+
+sub showmenu() {
+ clrtoeol($set{height}+2, 1);
+ my $nr = 0;
+ for (grep exists $menu[$_], $menumin+1..$menumin+$set{menushow}) {
+ my $sub = (my $s = $menu[$_]) =~ s/>\d+$//;
+ addstr($set{height}+2, $set{width}/$set{menushow}*($nr++), $_);
+ attron(A_REVERSE);
+ addstr($s);
+ attroff(A_REVERSE);
+ addch('>') if $sub;
+ } # display menu txts
+} # showmenu
+
+
+DRAW:
+clear;
+showmenu();
+showstack();
+addstr($set{height}+1, 0, "> "); # prompt
+
+while (1) {
+ addstr($set{height}+1, 2, showval($val{i}, $set{base}));
+ addstr('_'.$val{unit}{name}) if exists $val{unit};
+ addstr($val{bla}) if exists $val{bla};
+ clrtoeol;
+ refresh;
+
+ $_ = ReadKey;
+ if ($_ eq chr 27) {
+ while (defined (my $key = ReadKey -1)) {
+ $_ .= $key;
+ } # read additional keys
+ } # escape sequence
+
+ exists $alias{$_} and $_ = $alias{$_}; # command shortkeys
+ if (exists $falias{$_}) {
+ unless ($_ = $menu[$falias{$_}]) {
+ error("* no such menu entry *");
+ goto DRAW;
+ }
+ } # function key
+
+ $_ = delete $val{bla} if exists $val{bla} and $_ eq 'enter';
+
+ if ($_ eq 'quit') {
+ last;
+ } # quit
+ elsif ($_ eq 'refresh') {
+ goto DRAW;
+ } # refresh
+
+ elsif (exists $val{bla} or /^[A-Z]$/) {
+ if (defined $val{i}) {
+ unshift @stack, $val{i};
+ %val = (i=>undef, frac=>0);
+ showstack();
+ } # enter present value
+ if ($_ eq "drop") {
+ $val{bla} = substr $val{bla}, 0, -1 or delete $val{bla};
+ } # backspace
+ else {
+ $val{bla} .= lc $_;
+ } # add character
+ } # manual command
+
+ elsif (/^\d$/) {
+ $val{i} = 0 unless defined $val{i};
+ $_ = -$_ if $val{i}<0;
+ $val{i} = ($val{frac} *= 10) ? $val{i}+$_/$val{frac} : $val{i}*10+$_;
+ }
+ elsif ($_ eq '.') {
+ $val{i} = 0 unless defined $val{i};
+ $val{frac} = 1;
+ } # decimal point
+ elsif ($_ eq 'eex') {
+ $val{i} = 1 unless defined $val{i};
+ #todo
+ } # exponent
+ elsif ($_ eq 'chs' and defined $val{i}) {
+ $val{i} = -$val{i};
+ } # change sign
+ elsif ($_ eq 'drop' and defined $val{i}) {
+ $val{i} = ($val{frac} = int $val{frac}/10)
+ ? int($val{i}*$val{frac})/$val{frac} : int $val{i}/10
+ } # backspace
+
+ elsif (exists $action{$_} or /^\d$/) {
+ my ($type, $cmd) = @{ $action{$_} };
+ if ($type>0 and defined $val{i}) {
+ unshift @stack, $val{i};
+ %val = (i=>undef, frac=>0);
+ } # auto enter
+ if ($type>0 and $type>@stack) {
+ error("* insufficient stack arguments for operation *");
+ goto DRAW;
+ } # insufficient arguments
+ $var{undo} = [@stack] if $type>=0 and $_ ne 'undo';
+ $cmd->();
+ showstack() if $type>=0;
+ } # some operation
+
+ elsif (/>(\d+)$/) {
+ @menu = @{ $menus[$1] };
+ $menumin = 0;
+ showmenu();
+ } # submenu
+
+ elsif ($_ =~ /^_/) {{
+ $_ = $unit{substr $_, 1} or next;
+ if (exists $val{unit} and $val{unit}{type}==$_->{type}) {
+ unshift @stack, $val{i} if defined $val{i};
+ $stack[0] *= delete($val{unit})->{val} / $_->{val};
+ showstack();
+ %val = (i=>undef, frac=>0);
+ } # convert
+ else {
+ $val{unit} = $_;
+ } # set source unit
+ }} # conversion
+
+ else {
+ error("* unrecognised command: ".join(' ', map ord, split //, $_)." *");
+ goto DRAW; # screen messed up
+ } # error
+} # input loop
+
git.shiar.nl / descalc.git / blobdiff