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Conversion of floating point numbers between binary and decimal representation.
The fpio library contains a routines for converting floating-point numbers between IEEE binary representation and decimal string representation. It is based on the gdtoa library by David Gay.
There are two routines included with the library, string->fp and fp->string.
Library procedures[procedure] fp->string:: NUMBER [* NDIGITS] -> STRING
Converts the given floating-point number to decimal string representation. If optional argument NDIGITS is positive, the conversion is done to the specified number of decimal places. If NDIGITS is zero (the default) or negative, the conversion is done to the shortest decimal string that rounds to the given floating point value.[procedure] string->fp:: STRING [* ROUNDING] -> NUMBER
Converts the given decimal string number to binary IEEE floating point representation. Optional argument ROUNDING is a symbol that can be one of:
- indicates rounding-towards-zero mode (the default)
- indicates rounding-towards-nearest mode
- indicates rounding-towards +Inf mode
- indicates rounding-towards -Inf mode
- Use -fPIC flag to compile [thanks to Panos Stergiotis]
- Added import of foreign library [thanks to felix]
- Ported to Chicken 4
- Fixes to the file manifest
- Initial version
Copyright 2008-2011 Ivan Raikov.
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