Looking for calculator source code, BSD-licensed

I have an urgent project which need many functions of a calculator (plus a few in-house business rule formulas). As I won't have time to re-invent the wheel so I am looking for source code directly.

Requirements:

BSD-like licensed (commercial use friendly, GPL won't help)
in c/c++ programming language
32-bit CPU
minimum dependency on platform API/data structure
best with both RPN and prefix notation supported
emulator/simulator code also acceptable (if not impossible to add custom formula)

with following functions (from wikipedia)

Scientific notation for calculating large numbers
floating point arithmetic
logarithmic functions, using both base 10 and base e
trigonometry functions (some including hyperbolic trigonometry)
exponents and roots beyond the square root
quick access to constants such as pi and e

plus

hexadecimal, binary, and octal calculations, including basic Boolean math
fractions

optional

statistics and probability calculations
complex numbers
programmability
equation solving

to be frank, I don't have the guts to use golf code. at least not a project for _my_ clients ;-)

ohho 2010-04-29 03:47:47

Best of luck. If you can't understand one of those, I'd worry about getting an open source thingie.

Ira Baxter 2010-04-29 03:58:39

my personal understanding is only one concern. an open source option comes with the benefit of "more users" (though I can't be sure how many golf code here are being used in production sites)

ohho 2010-04-29 04:27:45

None are being used. The point is this is truly an easy piece of code. Whatever open source package you find is likely to be a lot more UI goo which you're going to toss than content by a lot, and you'll have to understand all that to throw the goo away. The core expression evaluator is practically nothing.

Ira Baxter 2010-04-29 05:22:27

it looks to me the c golf code does not do more than + - * / ^ ( ) =

ohho 2010-04-29 08:06:19

The point of these is that expression calculators are extremely easy. Given how these are put together, adding unary operators, more binary operators, special constants, etc. should be almost obvious. The "fractions" will require you to use a rationals package. Your optional part goes far beyond a "simple" calculator, Finally, you need to add your "business rule" formulas; you'll have to figure out how whatever calulator you take works to put those in.

Ira Baxter 2010-04-29 08:29:56

ansaurus

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Looking for calculator source code, BSD-licensed

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