int getcal(char *desc, char *units, DB_Calinfo *cal)
Return:
*cal contains the requested data
This function attempts to find calibration data for signals of type
desc, having physical units as given by units. If
successful, it fills in the contents of the DB_Calinfo structure
(see section Calibration Information Structures)
pointed to by cal. The caller must allocate storage for the
DB_Calinfo structure, and must not modify the contents of the
strings addressed by the sigtype and units fields of the
DB_Calinfo structure after getcal returns. getcal
returns data from the first entry in the calibration list that contains
a sigtype field that is either an exact match or a prefix of
desc, and a units field that is an exact match of
units; if either desc or units is NULL,
however, it is ignored for the purpose of finding a match.
getcal cannot succeed unless the calibration list has been
initialized by a previous invocation of calopen or putcal.
(This function was first introduced in DB library version 6.0.)
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