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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 "@(#) new_idf_spin_src.c 1.1 05/08/19 SwRI" #include #include "ret_codes.h" #include "libbase_idfs.h" /******************************************************************************* * * * IR_NEW_IDF_FILE_SPIN_SRC SUBROUTINE * * * * DESCRIPTION * * This module is called when a new VIDF file is to be retrieved and the * * start of spin data source information is to be picked up again in case of * * a change. * * * * INPUT VARIABLES * * SDDAS_SHORT btime_yr, start time for VIDF file to be retrieved * * btime_day * * SDDAS_LONG btime_sec, start time for VIDF file to be retrieved * * btime_nsec * * * * USAGE * * x = ir_new_idf_file_spin_src (btime_yr, btime_day, btime_sec, btime_nsec)* * * * NECESSARY SUBPROGRAMS * * strcpy() copies a string to another string variable * * file_pos() positions the data/header files for the * * data source at the desired start time * * ir_get_spin_src_info() retrieves start of spin data source info. * * from VIDF file * * ir_locate_ex() determines if the requested combination has * * already been processed and points to the * * correct structure allocated for the combo * * * * EXTERNAL VARIABLES * * struct general_info structure that holds information concerning * * ginfo the experiment that is being processed * * * * INTERNAL VARIABLES * * struct experiment_info ptr to the structure that holds info. * * *ex pertinent to the current IDFS data source * * being processed * * struct experiment_info a ptr to the structure that holds info. * * *spin_src_ex pertinent to the start of spin data source * * associated with the current IDFS data * * source being processed * * struct spin_src_info a pointer to the structure that holds * * *spin_src_ptr start of spin data source information * * SDDAS_ULONG main_dkey data key for parent source * * SDDAS_LONG etime_sec, user-requested end time * * etime_nsec * * SDDAS_LONG hold_offset some applications use this value & file_pos * * will over-ride this value * * SDDAS_USHORT main_version version number for parent source * * SDDAS_SHORT rval, ret_val the value returned by the called routine * * SDDAS_SHORT etime_yr, user-requested end time * * etime_day * * SDDAS_CHAR main_exten[] filename extension for parent source * * * * SUBSYSTEM * * Display Level * * * ******************************************************************************/ SDDAS_SHORT ir_new_idf_file_spin_src (SDDAS_SHORT btime_yr, SDDAS_SHORT btime_day, SDDAS_LONG btime_sec, SDDAS_LONG btime_nsec) { extern struct general_info ginfo; struct experiment_info *ex, *spin_src_ex; struct spin_src_info *spin_src_ptr; SDDAS_ULONG main_dkey; SDDAS_LONG etime_sec, etime_nsec, hold_offset; SDDAS_USHORT main_version; SDDAS_SHORT rval, ret_val, etime_yr, etime_day; SDDAS_CHAR main_exten[3]; /***************************************************************************/ /* Point to the parent ex structure. */ /***************************************************************************/ ex = ginfo.expt; main_dkey = ex->data_key; main_version = ex->version; strcpy (main_exten, ex->exten); etime_yr = ex->requested_time.etime_year; etime_day = ex->requested_time.etime_day; etime_sec = ex->requested_time.etime_sec; etime_nsec = ex->requested_time.etime_nsec; /********************************************************************/ /* Retrieve start of spin data source info. if still pertinent. */ /********************************************************************/ rval = ir_get_spin_src_info (btime_yr, btime_day, btime_sec, btime_nsec, etime_yr, etime_day, etime_sec, etime_nsec); if (rval != ALL_OKAY) { /*****************************************************************/ /* Reset ex pointer to parent source before returning on error. */ /*****************************************************************/ ret_val = ir_locate_ex (main_dkey, main_exten, main_version, 0); if (ret_val == ALL_OKAY) return (rval); else return (ret_val); } /*********************************************************************/ /* After calling previous module, current ex structure is the start */ /* of spin data source IF all went well; otherwise, pointing to same*/ /* ex. Save the next_offset value since this element is used by */ /* some applications to know how many data parameters are tied to */ /* this ex structure (file_pos will overwrite this value). */ /*********************************************************************/ spin_src_ex = ginfo.expt; if (spin_src_ex != ex) { rval = ir_locate_ex (main_dkey, main_exten, main_version, 0); ex = ginfo.expt; spin_src_ptr = ex->spin_src; /****************************************************************/ /* If the start of spin data source has been successfully */ /* identified, try to position it again. */ /****************************************************************/ if (spin_src_ptr->file_status == ALL_OKAY) { spin_src_ex->fnext = 0; hold_offset = spin_src_ex->next_offset; /*********************************************************************/ /* Position the data file at the requested start time. This is done*/ /* since start of spin data source may have changed from one VIDF */ /* to the next when multiple VIDF's are handled. */ /*********************************************************************/ rval = file_pos (spin_src_ptr->data_key, spin_src_ptr->exten, spin_src_ptr->version, spin_src_ptr->idf_data_ptr, btime_yr, btime_day, btime_sec, btime_nsec, etime_yr, etime_day, etime_sec, etime_nsec); if (rval != ALL_OKAY) { /*****************************************************************/ /* Reset ex pointer to parent source before returning on error. */ /*****************************************************************/ ret_val = ir_locate_ex (main_dkey, main_exten, main_version, 0); if (ret_val == ALL_OKAY) return (rval); else return (ret_val); } /***********************************************************************/ /* Put back next_offset value in start of spin data structure since */ /* it was overwritten by file_pos (). */ /***********************************************************************/ ginfo.expt->next_offset = hold_offset; } } /*****************************************************************/ /* Reset ex pointer to parent source before returning. */ /*****************************************************************/ ret_val = ir_locate_ex (main_dkey, main_exten, main_version, 0); return (ret_val); }