SI Units Checked and Unchecked

["Grein, Christoph" <christoph.grein@eurocopter.com>]

The ultimate SI Units checker has been updated. It now handles reading of units 
like reading of enumeration values. This only affects file reading operations 
for illegal items, i.e. those which raise Data_Error.

Hours, minutes and liters have been added as units.

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The ultimate SI Units checker deals with physical items in full generality,
including arbitrary powers and roots, checking the correctness of dimensions
in all expressions:

   Current_Density := (4.0/9.0) * Eps0 *
                      Sqrt (2.0 * Electron_Charge / Electron_Mass) *
                      Voltage**(3/2) / Distance**2;

where the exponent 3/2 is a rational number.

Temperature scales like Celsius and Fahrenheit (the corresponding SI unit is
Kelvin) are available with conversion functions taking into account whether
temperatures or temperature differences are converted. (For differences,
e.g. 1K = 1°C, but not for temperatures themselves.)

Further features include dimensional Text_IO, 3D vector arithmetics,
polynomials, linear interpolation and quadratic approximation.

Mathematical functions are included:

  exp (5.0*Meter) or log (10.0*Kilogramm) are illegal, but
  arctan (y => 10.0*Meter, x => 5.0*Meter) is of course legal as is
  sin (10.0*Centi*Meter, cycle => 1.0*Meter).

Unit checking can be switched off in production code by just changing a few 
lines of code.

See <http://home.T-Online.de/home/Christ-Usch.Grein/Ada/SI.html>

SI is released under GMGPL. Enjoy...

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Mein Radunfall
My bike accident


Christoph Grein
Mitglied von Ada-Deutschland
Member of Ada Germany
http:/www.ada-deutschland.de

http://home.T-Online.de/home/Christ-Usch.Grein
eMail: Christ-Usch.Grein@T-Online.de