INFO-FUNCTION

This function returns information, depending on the value of mode parameter, about an opened indexed file

The "isfilesys.def" copy file contains layouts for each kind of information that can be retrieved with this function.

Note - some information might not be returned by the current file handler.

Syntax

SET INFO-FUNCTION TO TRUE    CALL "I$IO" USING IO-FUNCTION                    f                    mode                    result             GIVING returnCode

Parameters:

f	the file handle returned by OPEN-FUNCTION.
mode	determines which result is returned.
	-1	returns the same information as the l_parms parameter of the MAKE-FUNCTION.   result is in the format of "11111,22222,333" where:
		1	maximum record size
		2	minimum record size
		3	number of keys
	-4	returns the number of records in the file.
	-5	returns the 256-byte key translation table. If no key translation table was specified, then the E_NO_SUPPORT error is set. In this case, this should be simply taken to mean that the native key ordering was used.
	0 or greater	a value of zero or greater indicates that information about a particular key is desired. '0' indicates the primary key, '1' indicates the first alternate key and so on.   That key information is returned as "11,2,333,44444" where: ( third and fourth fields are repeated for each additional segment in the key)
		1	number of segments in key.
		2	"1" if duplicates are allowed.
		3	size of first segment.
		4	byte offset of first segment.
result	depends by mode parameter.

Return code:

returnCode can be any signed numeric data item and provides additional information:

>0	Operation successful.
0	Operation failed.