X-Git-Url: http://git.shiar.net/descalc.git/blobdiff_plain/ce0d29d8a852b8bf7dcad717390a4ad8efb59263..b2aba05a22d1f4036008c2d12874ddc9eb98edc0:/math.pm

diff --git a/math.pm b/math.pm
new file mode 100644
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--- /dev/null
+++ b/math.pm
@@ -0,0 +1,86 @@
+# menu for DCT, by Shiar
+
+# 1.09.1 2004-10-02 22:55 - moved from 1.9 main
+# 1.09.2 2004-10-11 20:50 - functions don't handle stack themselves,
+#                           but behave like real functions
+
+use strict;
+use warnings;
+use utf8;
+
+my %newaction = (
+	'+'    => [2, sub { $_[1] + $_[0] }], # addition
+	'-'    => [2, sub { $_[1] - $_[0] }], # substraction
+	'*'    => [2, sub { $_[1] * $_[0] }], # multiplication
+	'/'    => [2, sub { $_[1] / $_[0] }], # division
+	'mod'  => [2, sub { $_[1] % $_[0] }], # modulo
+
+	'inv'  => [1, sub { 1 / $_[0] }], # 1/x
+	'sqrt' => [1, sub { sqrt $_[0] }], # square root
+	'sq'   => [1, sub { $_[0] * $_[0] }], # squared
+	'^'    => [2, sub { $_[1] ** $_[0] }], # exponentiation
+	'xroot'=> [2, sub { $_[1] ** (1/$_[0]) }], # x-root of y
+
+	'log'  => [1, sub { log($_[0]) / log(10) }], # logarithm
+	'alog' => [1, sub { 10 ** $_[0] }], # 10^x
+	'ln'   => [1, sub { log $_[0] }], # natural logaritm
+	'lnp1' => [1, sub { log($_[0] + 1) }], # ln(x+1)
+	'exp'  => [1, sub { exp $_[0] }], # e^x
+	'expm' => [1, sub { exp($_[0]) - 1 }], # exp(x)-1
+
+	'sin'  => [1, sub { sin $_[0] }], # sine
+	'asin' => [1, sub { atan2($_[0], sqrt(1 - $_[0]*$_[0])) }], # inverse sine
+	'cos'  => [1, sub { cos $_[0] }], # cosine
+	'acos' => [1, sub { atan2(sqrt(1 - $_[0]*$_[0]), $_[0]) }], # inverse cosine
+	'tan'  => [1, sub { sin($_[0]) / cos($_[0]) }], # tangent
+#	'atan' => [1, sub { }], # arctangent
+
+	'sinh' => [1, sub { (exp($_[0]) - exp(-$_[0])) / 2 }], # hyperbolic sine
+	'cosh' => [1, sub { (exp($_[0]) + exp(-$_[0])) / 2 }], # hyperbolic cosine
+	'tanh' => [1, sub { (exp($_[0]) - exp(-$_[0])) / (exp($_[0]) + exp(-$_[0])) }], # hyperbolic tangent (sinh/cosh)
+	'asinh'=> [1, sub { log(sqrt($_[0]**2+1) + $_[0]) }], # inverse hyperbolic sine
+	'acosh'=> [1, sub { log(sqrt($_[0]**2-1) + $_[0]) }], # inverse hyperbolic cosine
+	'atanh'=> [1, sub { log((1+$_[0]) / (1-$_[0])) / 2 }], # inverse hyperbolic tangent
+
+	'%'    => [2, sub { $_[0] / $_[1] }], # percentage
+#	'%ch'  => [2, sub { $val{i} = 100*(shift(@_)-$val{i})/$val{i} }], # percentage change
+#	'%t'   => [2, sub { $val{i} = 100*$val{i}/shift(@_) }], # percentage total
+
+	'and'  => [2, sub { $_[1] & $_[0] }], # bitwise and
+	'or'   => [2, sub { $_[1] | $_[0] }], # bitwise or
+	'xor'  => [2, sub { $_[1] ^ $_[0] }], # bitwise xor
+	'not'  => [2, sub { ~$_[0] }], # bitwise not
+	'sl'   => [1, sub { $_[0] * 2 }], # shift left
+	'sr'   => [1, sub { $_[0] / 2 }], # shift right
+
+	'abs'  => [1, sub { abs $_[0] }], # absolute #todo
+	'sign' => [1, sub { $_[0] <=> 0 }], # sign
+	'ip'   => [1, sub { int $_[0] }], # integer part
+	'fp'   => [1, sub { $_[0] - int $_[0] }], # fractional part
+
+#	'rnd'  => [1, sub { local $_ = 10**$_[0]; $val{i} = int(($val{i}+.5)*$_)/$_ }], # round
+#	'trnc' => [1, sub { local $_ = 10**$_[0]; $val{i} = int($val{i}*$_)/$_ }], # truncate
+	'floor'=> [1, sub { int $_[0] }], # floor
+	'ceil' => [1, sub { int $_[0]+.9999 }], # ceil
+
+	'min'  => [2, sub { $_[1]<$_[0] ? $_[1] : $_[0] }], # minimum
+	'max'  => [2, sub { $_[1]>$_[0] ? $_[1] : $_[0] }], # maximum
+
+	'dec'  => [-1, sub { $::set{base} = 10; () }], # decimal
+	'bin'  => [-1, sub { $::set{base} = 2; () }], # binary
+	'oct'  => [-1, sub { $::set{base} = 8; () }], # octal
+	'hex'  => [-1, sub { $::set{base} = 16; () }], # hexadecimal
+	'base' => [1, sub { $::set{base} = $_[0]; () }], # alphanumerical
+
+	'!'    => [1, sub { my $res = $_[0]; $res *= $_ for 2..$res-1; $res }], # factor
+	'rand' => [0, sub { rand }], # random value <1
+); # newaction
+
+#while (my ($cmd, $val) = each %newaction) {
+#	$action{$cmd} = $val;
+#}
+
+$action{$_} = $newaction{$_} for keys %newaction;
+
+1;
+