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Brahe

A Heterogenous C Library of Numeric Functions

 

Brahe is where I put all sorts of useful mathematic functions that don't seem to fit anywhere else. Among the bits and pieces here, you'll find:

• A function, brahe_sigdig, that rounds floating-point values to a specific number of significant digits -- very useful in scientific and engineering applications.
• Several pseudorandom number generators, including the Marsenne Twister, various algorithms by Marsaglia, and ISAAC.
• Least common multiple and greatest common denominator functions.
• A few trigonometry functions for finding the inversions of hyperbolic sine, cosine, and tangent.

I implemented Brahe as a static link C library for portability. This only causes problems under Microsoft's .NET platform, which is somewhat antagonistic toward traditional C code. When time permits, I'll write a "safe" wrapper for Brahe. In the mean time, PInvoke works reasonably well if you're working with managed code.

As always, I'm interested in your comments.