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SwRI can revise these Terms at any time * without notice by updating this posting. * * Trademarks * * The SwRI logo is a trademark of SwRI in the United States and other countries. * */ #ident "@(#) next_idf.c 1.19 05/08/19 SwRI" #include "ret_codes.h" #include "libbase_idfs.h" /******************************************************************************* * * * IR_NEXT_IDF_FILE SUBROUTINE * * * * DESCRIPTION * * This routine is called in order to determine if a new VIDF file is * * needed in order to continue processing the data. The VIDF file is time * * stamped in a way that indicates the time range for which the VIDF file is * * applicable. If the current time has exceeded the end time for the VIDF * * file, the existing file must be closed, a new file opened and memory * * reallocated accordingly. * * * * INPUT VARIABLES * * SDDAS_LONG cur_msec time parameters for the current data sample * * SDDAS_LONG cur_nsec time parameters for the current data sample * * * * USAGE * * x = ir_next_idf_file (cur_msec, cur_nsec) * * * * NECESSARY SUBPROGRAMS * * ir_new_idf_file () closes existing VIDF file, retrieves next VIDF* * file and re-reads pertinent information * * * * EXTERNAL VARIABLES * * struct general_info structure that holds information concerning * * ginfo the experiment that is being processed * * * * INTERNAL VARIABLES * * struct experiment_info a pointer to the structure that holds specific* * *ex experiment information * * struct ptr_rec *ptr a pointer to the structure which holds all * * pointers to the header and data for the * * experiment of interest * * SDDAS_LONG max_nsec the maximum time sample (nanoseconds portion) * * associated with the current VIDF file * * SDDAS_LONG cur_sec, time parameters for the current data sample * * new_nsec * * SDDAS_SHORT rval holds value returned by called module * * SDDAS_SHORT cur_yr, cur_day time parameters for the current data sample * * * * SUBSYSTEM * * Display Level * * * ******************************************************************************/ SDDAS_SHORT ir_next_idf_file (SDDAS_LONG cur_msec, SDDAS_LONG cur_nsec) { extern struct general_info ginfo; struct experiment_info *ex; struct ptr_rec *ptr; SDDAS_LONG max_nsec, cur_sec, new_nsec; SDDAS_SHORT rval, cur_yr, cur_day; /***************************************************************************/ /* Set a pointer to the structure which holds all pointers for header and */ /* data information for the experiment currently being processed. */ /***************************************************************************/ ex = ginfo.expt; ptr = ex->info_ptr; /**************************************************************************/ /* DE_USEC is in microseconds so convert to nanoseconds for comparison. */ /**************************************************************************/ max_nsec = ex->de_usec * 1000; cur_yr = *ptr->YEAR; cur_day = *ptr->DAYOFYEAR; cur_sec = (cur_msec + (cur_nsec / 1000000)) / 1000; new_nsec = (cur_msec % 1000) * 1000000 + cur_nsec; /************************************************************************/ /* Check other time elements since the year matches. */ /************************************************************************/ if (cur_yr == ex->de_year) { if (cur_day > ex->de_day) { rval = ir_new_idf_file (cur_yr, cur_day, cur_sec, new_nsec); return (rval); } else if (cur_day == ex->de_day && cur_msec > ex->de_msec) { rval = ir_new_idf_file (cur_yr, cur_day, cur_sec, new_nsec); return (rval); } else if (cur_day == ex->de_day && cur_msec == ex->de_msec && cur_nsec > max_nsec) { rval = ir_new_idf_file (cur_yr, cur_day, cur_sec, new_nsec); return (rval); } } /************************************************************************/ /* The time has exceeded the current VIDF time frame? */ /************************************************************************/ else if (cur_yr > ex->de_year) { rval = ir_new_idf_file (cur_yr, cur_day, cur_sec, new_nsec); return (rval); } return (ALL_OKAY); }