"Michael Marcin" <mmarcin@method-solutions.com> wrote in message news:<ecg4ib$d6h$1@sea.gmane.org>...
Does boost have a fixed-point math library?
I guess not. I wrote something to suit my immediate needs. This is my first try at writing boost-like code. I'd appreciate suggestions/criticism. One thing I'd like to do is add optional over/underflow, but I'm not sure how I'll do that yet. For another I think I should specialize std::numeric_limits for the fixed type, but I'm not sure what to put for a lot of the entries as I've only ever needed min() and max() myself. Thanks, Michael Marcin Method Solutions, Programmer // a simple function to instantiate my definitions void instatiate_fixed() { using namespace boostish::math; typedef fixed<16,16> fx16_16; fx16_16 testint(5); fx16_16 testfloat(5.0f); fx16_16 testdouble(5.0); fx16_16 test = fx16_16(5); // copy constructions test = fx16_16(5); // assignment assert( test < fx16_16(6) ); // less than compare assert( test == fx16_16(5) ); // equality compare test += fx16_16(5); // addition and assignment test -= fx16_16(5); // subtraction and assignment test *= fx16_16(5); // multiplication and assignment test /= fx16_16(5); // division and assignment ++test; // prefix increment --test; // prefix decrement test *= 5; // integer multiplication and assignment test /= 5; // integer division and assignment test = test * 5; // integer multiplication test = 5 * test; // commutative integer multiplication test = test / 25; // integer division assert( to_integer(test) == 5 ); // conversion to integer assert( to_float(test) == 5.0f ); // conversion to float assert( to_double(test) == 5.0 ); // conversion to double fx16_16 raw = as_fixed( 1<<16 );// raw fixed-point number to wrapped fixed-point assert( raw == fx16_16(1) ); } -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.1.405 / Virus Database: 268.11.7/436 - Release Date: 9/1/2006