fpio

Conversion of floating point numbers between binary and decimal representation.

  1. fpio
    1. Introduction
    2. Library procedures
    3. Authors
    4. Version
    5. License

Introduction

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:

toward-zero
indicates rounding-towards-zero mode (the default)
nearest
indicates rounding-towards-nearest mode
toward+Inf
indicates rounding-towards +Inf mode
toward-Inf
indicates rounding-towards -Inf mode

Authors

Ivan Raikov

Version

1.5
Use -fPIC flag to compile [thanks to Panos Stergiotis]
1.4
Added import of foreign library [thanks to felix]
1.3
Ported to Chicken 4
1.2
Fixes to the file manifest
1.0
Initial version

License

Copyright 2008-2011 Ivan Raikov.

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:

- Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.

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contributors may be used to endorse or promote products derived
from this software without specific prior written permission.

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