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Full Discussion: a simple fundamental
Top Forums Programming a simple fundamental Post 23789 by Perderabo on Saturday 29th of June 2002 11:27:03 AM
Old 06-29-2002
When you want to exceed the maximum value of the largest data type that a language has, you have a clear path to follow: invent your own data type. You will need to write routines to convert long double to and from your private data type. You will need to write your own routines to add to elements of your private data type. And you will need to write your own routines to display the values of your private data type.

The bad news: none of this is easy and it probably cannot be written portably. The good news: your private data type can take many forms, so there are indeed a lot of solutions. Smilie
 

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IWPRIV(8)						     Linux Programmer's Manual							 IWPRIV(8)

NAME
iwpriv - configure optionals (private) parameters of a wireless network interface SYNOPSIS
iwpriv [interface] iwpriv interface private-command [private-parameters] iwpriv interface private-command [I] [private-parameters] iwpriv interface --all DESCRIPTION
Iwpriv is the companion tool to iwconfig(8). Iwpriv deals with parameters and setting specific to each driver (as opposed to iwconfig which deals with generic ones). Without any argument, iwpriv list the available private commands available on each interface, and the parameters that they require. Using this information, the user may apply those interface specific commands on the specified interface. In theory, the documentation of each device driver should indicate how to use those interface specific commands and their effect. PARAMETERS
private-command [private-parameters] Execute the specified private-command on the interface. The command may optionally take or require arguments, and may display information. Therefore, the command line parameters may or may not be needed and should match the command expectations. The list of commands that iwpriv displays (when called without argument) should give you some hints about those parameters. However you should refer to the device driver documentation for information on how to properly use the command and the effect. private-command [I] [private-parameters] Idem, except that I (an integer) is passed to the command as a Token Index. Only some command will use the Token Index (most will ignore it), and the driver documentation should tell you when it's needed. -a/--all Execute and display all the private commands that don't take any arguments (i.e. read only). DISPLAY
For each device which support private commands, iwpriv will display the list of private commands available. This include the name of the private command, the number or arguments that may be set and their type, and the number or arguments that may be display and their type. For example, you may have the following display : eth0 Available private ioctl : setqualthr (89F0) : set 1 byte & get 0 gethisto (89F7) : set 0 & get 16 int This indicate that you may set the quality threshold and display an histogram of up to 16 values with the following commands : iwpriv eth0 setqualthr 20 iwpriv eth0 gethisto AUTHOR
Jean Tourrilhes - jt@hpl.hp.com FILES
/proc/net/wireless SEE ALSO
iwconfig(8), iwlist(8), iwevent(8), iwspy(8), wireless(7). net-tools 31 October 1996 IWPRIV(8)
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