Документ взят из кэша поисковой машины. Адрес оригинального документа : http://www.atnf.csiro.au/computing/software/gipsy/sub/gds___check.dc3 Дата изменения: Thu Jan 23 17:11:11 1992 Дата индексирования: Fri Jan 16 23:10:27 2009 Кодировка:

Name: GDS___CHECK

Purpose: Condition checking and handling routine

Author: J.P. Terlouw

Use: CALL GDS___CHECK ( cond, code, error, exit )

cond = logical expression
code = INTEGER variable, constant or
expression
error = INTEGER variable containing the
error argument as declared
exit = any of the following specifiers:
*RETURN, *XWHILE, *XREPEAT, *XFOR or
*procedurename

Description:
If 'error' < 0 , this routine calls GDS___ERROR with this
value and does no further checking.
If 'error' >= 0, or if 'error' has not been specified in
the call to the routine which calls this one, the following
procedure is followed:
If the condition 'cond' is .TRUE., this routine does nothing.
If it is .FALSE., and 'error' has been specified in the call
to the subroutine which calls GDS___CHECK, then 'code' is
copied to 'error' and the statement specified in 'exit' is
executed; if 'error' has not been specified, then GDS___CHECK
calls GDS___ERROR with 'code' as argument.

Note: This routine is not C-compatible .

Update history:
1-Apr-87 Original document
15-Dec-89 version compliant with GPS