/* * Copyright (C) 1998 by Southwest Research Institute (SwRI) * * All rights reserved under U.S. Copyright Law and International Conventions. * * The development of this Software was supported by contracts NAG5-3148, * NAG5-6855, NAS8-36840, NAG5-2323, and NAG5-7043 issued on behalf of * the United States Government by its National Aeronautics and Space * Administration. Southwest Research Institute grants to the Government, * and others acting on its behalf, a paid-up nonexclusive, irrevocable, * worldwide license to reproduce, prepare derivative works, and perform * publicly and display publicly, by or on behalf of the Government. * Other than those rights granted to the United States Government, no part * of this Software may be reproduced in any form or by any means, electronic * or mechanical, including photocopying, without permission in writing from * Southwest Research Institute. 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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 "@(#) pps_buf.c 1.20 05/08/19 SwRI" #include "user_defs.h" #include "libtrec_idfs.h" /**************************************************************************** * * * IR_PPS_BUFFER SUBROUTINE * * * * DESCRIPTION * * This routine is called in order to stuff data into the data buffers * * returned by FILL_DATA() according to SAMP INDEX values returned by each * * data sample. The pps or SAMP INDEX values are used as indexes into the * * data buffers. * * * * INPUT VARIABLES * * SDDAS_USHORT num_sample the number of elements per data buffer * * reg SDDAS_FLOAT *smnmx lower and upper data cutoff values * * SDDAS_CHAR found_data flag indicating if data was returned for * * requested sensor * * SDDAS_FLOAT time_frac percentage of the time resolution covered * * by the sweep * * SDDAS_LONG offset_unit offset used to get to correct data level * * sub-buffer in the data array * * SDDAS_FLOAT *dptr pointer to the data array * * SDDAS_FLOAT *tfrac pointer to the normalization factors * * SDDAS_CHAR *bin_stat pointer to the bin status array * * SDDAS_FLOAT *tmp_buf pointer to the converted data levels * * SDDAS_CHAR data_type type of data to be processed * * SDDAS_SHORT num_bins maximum number of bins available to be * * filled * * void *idf_data_ptr ptr to memory location for the structure * * that holds returned data values (read_drec)* * * * USAGE * * ir_pps_buffer (num_sample, smnmx, found_data, time_frac, offset_unit, * * &dptr, &tfrac, &bin_stat, &tmp_buf, data_type, num_bins, * * idf_data_ptr) * * * * NECESSARY SUBPROGRAMS * * None * * * * EXTERNAL VARIABLES * * None * * * * INTERNAL VARIABLES * * struct idf_data *EXP_DATA structure that holds all of the currently * * returned data values to be processed * * register SDDAS_FLOAT *f1 fast float pointer * * register SDDAS_FLOAT *f2 fast float pointer * * register SDDAS_FLOAT *f3 fast float pointer * * register SDDAS_LONG *l1 fast long pointer * * reg SDDAS_CHAR *c1 fast char pointer * * SDDAS_FLOAT lower_cutoff lower data cutoff value * * SDDAS_FLOAT upper_cutoff upper data cutoff value * * SDDAS_FLOAT dval data value computed once and used in loop * * SDDAS_LONG *l1_end pointer loop terminator * * SDDAS_BOOL in_range flag indicating d_qual value within range * * * * SUBSYSTEM * * Display Level * * * ***************************************************************************/ void ir_pps_buffer (SDDAS_USHORT num_sample, register SDDAS_FLOAT *smnmx, SDDAS_CHAR found_data, SDDAS_FLOAT time_frac, SDDAS_LONG offset_unit, SDDAS_FLOAT *dptr, SDDAS_FLOAT *tfrac, SDDAS_CHAR *bin_stat, SDDAS_FLOAT *tmp_buf, SDDAS_CHAR data_type, SDDAS_SHORT num_bins, void *idf_data_ptr) { struct idf_data *EXP_DATA; register SDDAS_FLOAT *f1, *f2, *f3; register SDDAS_LONG *l1; register SDDAS_CHAR *c1; SDDAS_LONG *l1_end; SDDAS_FLOAT lower_cutoff, upper_cutoff, dval; SDDAS_BOOL in_range; /*********************************************************************/ /* This data object is not associated with any particular band, */ /* therefore, just place the value into all the bins. */ /*********************************************************************/ lower_cutoff = *smnmx; upper_cutoff = *(smnmx + 1); if (data_type == D_QUAL) { c1 = bin_stat + offset_unit; f1 = dptr + offset_unit; f2 = tfrac + offset_unit; f3 = f1 + num_bins; /********************************************************************/ /* Since same value is placed in all bins, if it is a "fill" value,*/ /* simply ignore so just return. TMP_BUF[0] holds the data in */ /* converted units. */ /********************************************************************/ if (*tmp_buf < VALID_MIN) return; in_range = (*tmp_buf >= lower_cutoff && *tmp_buf <= upper_cutoff) ? sTrue : sFalse; dval = *tmp_buf * time_frac; for ( ; f1 < f3; ++f1, ++f2, ++c1) { /****************************************************************/ /* Include only data values that fall within the cutoff range. */ /****************************************************************/ if (in_range == sTrue) { if (*c1 == 0) { *f1 = dval; *c1 = 1; *f2 = time_frac; } else { *f1 += dval; *f2 += time_frac; } } /*****************************************************************/ /* If data was found but was excluded because of cutoff values, */ /* set the data value to a flagged value to indicate that the */ /* bin was returned (not missing). This is done if NO previous */ /* data has been placed into this bin. */ /*****************************************************************/ else if (found_data && *c1 == 0) *f1 = OUTSIDE_MAX; } } else { /*********************************************************************/ /* The filling of the sweep array begins here according to the */ /* following outine */ /* */ /* 1) Set up intial pointers to the data edges. */ /* 2) Loop over each sweep step */ /* 3) Put data into found bin */ /*********************************************************************/ EXP_DATA = (struct idf_data *) idf_data_ptr; l1 = EXP_DATA->swp_data; l1_end = l1 + num_sample; c1 = bin_stat + offset_unit; f1 = dptr + offset_unit; f2 = tfrac + offset_unit; f3 = tmp_buf; for ( ; l1 < l1_end; ++l1, ++f3) { if (*f3 >= lower_cutoff && *f3 <= upper_cutoff) { if (*(c1 + *l1) == 0) { *(f1 + *l1) = *f3 * time_frac; *(c1 + *l1) = 1; *(f2 + *l1) = time_frac; } else { *(f1 + *l1) += *f3 * time_frac; *(f2 + *l1) += time_frac; } } /**************************************************/ /* Value is a "fill" value? Simply ignore. */ /**************************************************/ else if (*f3 < VALID_MIN) continue; /*****************************************************************/ /* If data was found but was excluded because of cutoff values, */ /* set the data value to a flagged value to indicate that the */ /* bin was returned (not missing). This is done if NO previous */ /* data has been placed into this bin. */ /*****************************************************************/ else if (found_data && *(c1 + *l1) == 0) *(f1 + *l1) = OUTSIDE_MAX; } } }