/* * 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 "@(#) trans_data.c 1.16 05/08/19 SwRI" #include "libbase_idfs.h" /******************************************************************************* * * * IR_TRANSFER_DATA SUBROUTINE * * * * DESCRIPTION * * This routine is called to copy the raw data into the data array that * * will be returned to the user from the convert_to_units() call. The data * * is copied into this array before any table operations are performed. In * * the transfer to the floating point array, a check is made to determine if * * the raw telemetry is unsigned binary, signed binary, or floating point. * * * * INPUT VARIABLES * * SDDAS_FLOAT *ret_data pointer to the array that holds the values * * returned by the module * * SDDAS_LONG num_data the number of elements being processed * * SDDAS_CHAR *inp_data pointer to the array that holds the input * * data values * * SDDAS_CHAR dtype the format of the data - uns int, int, float * * SDDAS_CHAR tdw_len the word length for the data (in bits) * * SDDAS_LONG inp_start index value indicating where to start in the * * input data array * * * * USAGE * * ir_transfer_data (&ret_data, inp_data, num_data, dtype, tdw_len, * * inp_start) * * * * NECESSARY SUBPROGRAMS * * ir_intfp2fp () reconstructs raw floating point data * * ir_to_sign() converts raw data into signed integer data * * * * EXTERNAL VARIABLES * * None * * * * INTERNAL VARIABLES * * reg SDDAS_FLOAT *f1 pointer to SDDAS_FLOAT values * * register SDDAS_LONG *l1 pointer to a signed long data value * * register SDDAS_LONG j looping variable * * register SDDAS_ULONG *ul pointer to an uns. long data value * * * * SUBSYSTEM * * Display Level * * * ******************************************************************************/ void ir_transfer_data (SDDAS_FLOAT *ret_data, SDDAS_CHAR *inp_data, SDDAS_LONG num_data, SDDAS_CHAR dtype, SDDAS_CHAR tdw_len, SDDAS_LONG inp_start) { register SDDAS_FLOAT *f1; register SDDAS_LONG *l1, j; register SDDAS_ULONG *ul; /************************************************************************/ /* For optimization purposes, it's advised to use ++x instead of x++. */ /************************************************************************/ /**************************************************************************/ /* The format of the injested data is unsigned integer binary data. */ /**************************************************************************/ f1 = ret_data; if (dtype == 0) { ul = (SDDAS_ULONG *) inp_data + inp_start; for (j = 0; j < num_data; ++j, ++f1, ++ul) *f1 = *ul; } /**************************************************************************/ /* The format of the injested data is signed integer binary data. */ /**************************************************************************/ else if (dtype == 1) { l1 = (SDDAS_LONG *) inp_data + inp_start; for (j = 0; j < num_data; ++j, ++f1, ++l1) *f1 = ir_to_sign (*l1, tdw_len); } /**************************************************************************/ /* The format of the injested data is floating point data. */ /**************************************************************************/ else { ul = (SDDAS_ULONG *) inp_data + inp_start; for (j = 0; j < num_data; ++j, ++f1, ++ul) *f1 = ir_intfp2fp (*ul, dtype); } }