dbgetstart

long dbgetstart(DB_Signal s)

Return:

(long)

the length of the prolog of the file that contains input signal s

This function returns the number of bytes in the prolog of the signal file that contains the specified input signal, as recorded in the `header' file. Note that dbgetstart does not determine the length of the prolog by inspection of the signal file; it merely reports what has been determined by other means and recorded in the `header' file. Since the prolog is not readable using the DB library, and since functions such as isigopen and isigsettime take the prolog into account when calculating byte offsets for getframe and getvec, dbgetstart is useful primarily for programs that need to rewrite existing `header' files, where it is necessary to preserve the previously recorded byte offsets. For an example of how this can be done, see section dbgetskew. (This function was first introduced in DB library version 9.4.)

Go to the first, previous, next, last section, table of contents.