rsspice 0.1.0

//
// GENERATED FILE
//

use super::*;
use crate::SpiceContext;
use f2rust_std::*;

const NDC: i32 = 2;
const NIC: i32 = 6;
const DTYPE: i32 = 2;

/// C-kernel, number of records, type 02
///
/// Return the number of pointing records in a CK type 02 segment.
/// The segment is identified by a CK file handle and segment
/// descriptor.
///
/// # Required Reading
///
/// * [CK](crate::required_reading::ck)
/// * [DAF](crate::required_reading::daf)
///
/// # Brief I/O
///
/// ```text
///  VARIABLE  I/O  DESCRIPTION
///  --------  ---  --------------------------------------------------
///  HANDLE     I   The handle of the CK file containing the segment.
///  DESCR      I   The descriptor of the type 2 segment.
///  NREC       O   The number of records in the segment.
/// ```
///
/// # Detailed Input
///
/// ```text
///  HANDLE   is the handle of the binary CK file containing the
///           segment. The file should have been opened for read or
///           write access, by CKLPF, DAFOPR or DAFOPW.
///
///  DESCR    is the packed descriptor of a data type 2 CK segment.
/// ```
///
/// # Detailed Output
///
/// ```text
///  NREC     is the number of pointing records in the type 2 segment
///           associated with HANDLE and DESCR.
/// ```
///
/// # Exceptions
///
/// ```text
///  1)  If the segment indicated by DESCR is not a type 2 segment,
///      the error SPICE(CKWRONGDATATYPE) is signaled.
///
///  2)  If the specified handle does not belong to any file that is
///      currently known to be open, an error is signaled by a routine
///      in the call tree of this routine.
///
///  3)  If DESCR is not a valid descriptor of a segment in the CK
///      file specified by HANDLE, the results of this routine are
///      unpredictable.
/// ```
///
/// # Files
///
/// ```text
///  The CK file specified by HANDLE should be open for read or write
///  access.
/// ```
///
/// # Particulars
///
/// ```text
///  For a complete description of the internal structure of a type 2
///  segment, see the CK required reading.
///
///  This routine returns the number of pointing records contained
///  in the specified segment. It is normally used in conjunction
///  with CKGR02, which returns the Ith record in the segment.
/// ```
///
/// # Examples
///
/// ```text
///  The numerical results shown for this example may differ across
///  platforms. The results depend on the SPICE kernels used as
///  input, the compiler and supporting libraries, and the machine
///  specific arithmetic implementation.
///
///  1) The following code example extracts the start and end SCLK
///     time, seconds per tick rate, platform's +Z axis direction,
///     and angular velocity vector for each pointing instance in
///     the first segment in a CK file that contains segments of data
///     type 2.
///
///     Use the CK kernel below, available in the Viking Orbiter PDS
///     archives, as input for the code example.
///
///        vo2_swu_ck2.bc
///
///     Example code begins here.
///
///
///           PROGRAM CKNR02_EX1
///           IMPLICIT NONE
///
///           DOUBLE PRECISION      AV      ( 3 )
///           DOUBLE PRECISION      CMAT    ( 3, 3 )
///           DOUBLE PRECISION      DCD     ( 2  )
///           DOUBLE PRECISION      DESCR   ( 5  )
///           DOUBLE PRECISION      QUAT    ( 4 )
///           DOUBLE PRECISION      RECORD  ( 10 )
///           DOUBLE PRECISION      SCLKE
///           DOUBLE PRECISION      SCLKR
///           DOUBLE PRECISION      SCLKS
///           DOUBLE PRECISION      Z       ( 3 )
///
///           INTEGER               ICD     ( 6 )
///           INTEGER               HANDLE
///           INTEGER               NREC
///           INTEGER               I
///
///           LOGICAL               FOUND
///
///     C
///     C     First load the file. (The file may also be opened by
///     C     using CKLPF).
///     C
///           CALL DAFOPR ( 'vo2_swu_ck2.bc', HANDLE )
///
///     C
///     C     Begin forward search.  Find the first array.
///     C
///           CALL DAFBFS ( HANDLE )
///           CALL DAFFNA ( FOUND  )
///
///     C
///     C     Get segment descriptor.
///     C
///           CALL DAFGS ( DESCR )
///
///     C
///     C     Unpack the segment descriptor into its double precision
///     C     and integer components.
///     C
///           CALL DAFUS ( DESCR, 2, 6, DCD, ICD )
///
///     C
///     C     The data type for a segment is located in the third
///     C     integer component of the descriptor.
///     C
///           IF ( ICD( 3 ) .EQ. 2 ) THEN
///
///     C
///     C        How many records does this segment contain?
///     C
///              CALL CKNR02 ( HANDLE, DESCR, NREC )
///
///              DO I = 1, NREC
///
///     C
///     C           Get the Ith record in the segment.
///     C
///                 CALL CKGR02 ( HANDLE, DESCR, I, RECORD )
///
///     C
///     C           Unpack RECORD into the start and end time, rate in
///     C           TDB seconds/tick, quaternion, and av.
///     C
///                 SCLKS = RECORD ( 1 )
///                 SCLKE = RECORD ( 2 )
///                 SCLKR = RECORD ( 3 )
///
///                 CALL MOVED ( RECORD(4), 4, QUAT )
///                 CALL MOVED ( RECORD(8), 3, AV   )
///
///     C
///     C           The +Z axis direction is the third row of the
///     C           C-matrix.
///     C
///                 CALL Q2M ( QUAT, CMAT )
///
///                 Z(1) = CMAT(3,1)
///                 Z(2) = CMAT(3,2)
///                 Z(3) = CMAT(3,3)
///
///     C
///     C           Write out the results.
///     C
///                 WRITE (*,'(A,I2)') 'Record: ', I
///                 WRITE (*,'(A,F21.6)') '   Start encoded SCLK:',
///          .                              SCLKS
///                 WRITE (*,'(A,F21.6)') '   End encoded SCLK  :',
///          .                              SCLKE
///                 WRITE (*,'(A,F21.6)') '   TDB Seconds/tick  :',
///          .                              SCLKR
///                 WRITE (*,'(A,3F13.8)') '   +Z axis           :',
///          .                              Z
///                 WRITE (*,'(A,3F13.8)') '   Angular velocity  :',
///          .                              AV
///                 WRITE (*,*)
///
///              END DO
///
///           END IF
///
///           END
///
///
///     When this program was executed on a Mac/Intel/gfortran/64-bit
///     platform, the output was:
///
///
///     Record:  1
///        Start encoded SCLK:   32380393707.000015
///        End encoded SCLK  :   32380395707.000015
///        TDB Seconds/tick  :             0.001000
///        +Z axis           :   0.62277152  -0.29420673   0.72498141
///        Angular velocity  :   0.00000000   0.00000000   0.00000000
///
///     Record:  2
///        Start encoded SCLK:   32380402605.999947
///        End encoded SCLK  :   32380404605.999947
///        TDB Seconds/tick  :             0.001000
///        +Z axis           :   0.62172600  -0.27894910   0.73187716
///        Angular velocity  :   0.00000000   0.00000000   0.00000000
///
///     Record:  3
///        Start encoded SCLK:   32380412542.000053
///        End encoded SCLK  :   32380414542.000053
///        TDB Seconds/tick  :             0.001000
///        +Z axis           :   0.62183610  -0.26307233   0.73764003
///        Angular velocity  :   0.00000000   0.00000000   0.00000000
///
///     Record:  4
///        Start encoded SCLK:   32827264875.000000
///        End encoded SCLK  :   32827266875.000000
///        TDB Seconds/tick  :             0.001000
///        +Z axis           :   0.82984105  -0.44796078   0.33270853
///        Angular velocity  :   0.00000000   0.00000000   0.00000000
///
///     Record:  5
///        Start encoded SCLK:   32827403805.999992
///        End encoded SCLK  :   32827405805.999992
///        TDB Seconds/tick  :             0.001000
///        +Z axis           :   0.80812500  -0.44911178   0.38109395
///        Angular velocity  :   0.00000000   0.00000000   0.00000000
///
///     Record:  6
///        Start encoded SCLK:   32827412705.000042
///        End encoded SCLK  :   32827414705.000042
///        TDB Seconds/tick  :             0.001000
///        +Z axis           :   0.81120505  -0.43593555   0.38975193
///        Angular velocity  :   0.00000000   0.00000000   0.00000000
///
///     Record:  7
///        Start encoded SCLK:   32827417284.000038
///        End encoded SCLK  :   32827419284.000038
///        TDB Seconds/tick  :             0.001000
///        +Z axis           :   0.81313834  -0.42861613   0.39382008
///        Angular velocity  :   0.00000000   0.00000000   0.00000000
///
///     Record:  8
///        Start encoded SCLK:   33793314593.000053
///        End encoded SCLK  :   33793316593.000053
///        TDB Seconds/tick  :             0.001000
///        +Z axis           :   0.79860617  -0.37840751   0.46801275
///        Angular velocity  :   0.00000000   0.00000000   0.00000000
///
///     Record:  9
///        Start encoded SCLK:   33793332478.000046
///        End encoded SCLK  :   33793334478.000046
///        TDB Seconds/tick  :             0.001000
///        +Z axis           :   0.77861783  -0.39171670   0.49021658
///        Angular velocity  :   0.00000000   0.00000000   0.00000000
///
///     Record: 10
///        Start encoded SCLK:   33793341463.000061
///        End encoded SCLK  :   33793343463.000061
///        TDB Seconds/tick  :             0.001000
///        +Z axis           :   0.76852381  -0.39797437   0.50098659
///        Angular velocity  :   0.00000000   0.00000000   0.00000000
///
///     Record: 11
///        Start encoded SCLK:   33793350363.000034
///        End encoded SCLK  :   33793352363.000034
///        TDB Seconds/tick  :             0.001000
///        +Z axis           :   0.75779934  -0.40484364   0.51170478
///        Angular velocity  :   0.00000000   0.00000000   0.00000000
///
///     Record: 12
///        Start encoded SCLK:   33984028250.000000
///        End encoded SCLK  :   33984030250.000000
///        TDB Seconds/tick  :             0.001000
///        +Z axis           :   0.77099184  -0.39926339   0.49614546
///        Angular velocity  :   0.00000000   0.00000000   0.00000000
///
///     Record: 13
///        Start encoded SCLK:   33984046134.999992
///        End encoded SCLK  :   33984048134.999992
///        TDB Seconds/tick  :             0.001000
///        +Z axis           :   0.75024440  -0.41218993   0.51694564
///        Angular velocity  :   0.00000000   0.00000000   0.00000000
///
///     Record: 14
///        Start encoded SCLK:   33984055121.000053
///        End encoded SCLK  :   33984057121.000053
///        TDB Seconds/tick  :             0.001000
///        +Z axis           :   0.73947359  -0.41886863   0.52699894
///        Angular velocity  :   0.00000000   0.00000000   0.00000000
///
///     Record: 15
///        Start encoded SCLK:   33984220835.999966
///
///     [...]
///
///
///     Warning: incomplete output. Only 100 out of 875 lines have been
///     provided.
/// ```
///
/// # Restrictions
///
/// ```text
///  1)  The binary CK file containing the segment whose descriptor was
///      passed to this routine must be opened for read or write access
///      by CKLPF, DAFOPR or DAFOPW.
/// ```
///
/// # Author and Institution
///
/// ```text
///  J. Diaz del Rio    (ODC Space)
///  J.M. Lynch         (JPL)
/// ```
///
/// # Version
///
/// ```text
/// -    SPICELIB Version 1.1.0, 26-OCT-2021 (JDR)
///
///         Added IMPLICIT NONE statement.
///
///         Edited the header to comply with NAIF standard. Created
///         complete code example from existing code fragment.
///
///         Improved text in the $Abstract section.
///
/// -    SPICELIB Version 1.0.0, 25-NOV-1992 (JML)
/// ```
pub fn cknr02(
    ctx: &mut SpiceContext,
    handle: i32,
    descr: &[f64],
    nrec: &mut i32,
) -> crate::Result<()> {
    CKNR02(handle, descr, nrec, ctx.raw_context())?;
    ctx.handle_errors()?;
    Ok(())
}

//$Procedure CKNR02 ( C-kernel, number of records, type 02 )
pub fn CKNR02(
    HANDLE: i32,
    DESCR: &[f64],
    NREC: &mut i32,
    ctx: &mut Context,
) -> f2rust_std::Result<()> {
    let DESCR = DummyArray::new(DESCR, 1..);
    let mut BEG: i32 = 0;
    let mut END: i32 = 0;
    let mut ARRSIZ: i32 = 0;
    let mut ICD = StackArray::<i32, 6>::new(1..=NIC);
    let mut DCD = StackArray::<f64, 2>::new(1..=NDC);

    //
    // SPICELIB functions
    //

    //
    // Local parameters
    //
    //    NDC        is the number of double precision components in an
    //               unpacked C-kernel descriptor.
    //
    //    NIC        is the number of integer components in an unpacked
    //               C-kernel descriptor.
    //
    //    DTYPE      is the data type.
    //

    //
    // Local variables
    //

    //
    // Standard SPICE error handling.
    //
    if RETURN(ctx) {
        return Ok(());
    } else {
        CHKIN(b"CKNR02", ctx)?;
    }

    //
    // The unpacked descriptor contains the following information
    // about the segment:
    //
    //    DCD(1)  Initial encoded SCLK
    //    DCD(2)  Final encoded SCLK
    //    ICD(1)  Instrument
    //    ICD(2)  Inertial reference frame
    //    ICD(3)  Data type
    //    ICD(4)  Angular velocity flag
    //    ICD(5)  Initial address of segment data
    //    ICD(6)  Final address of segment data
    //
    //
    DAFUS(
        DESCR.as_slice(),
        NDC,
        NIC,
        DCD.as_slice_mut(),
        ICD.as_slice_mut(),
    );

    //
    // If this segment is not of data type 2, then signal an error.
    //

    if (ICD[3] != DTYPE) {
        SETMSG(
            b"Data type of the segment should be 2: Passed descriptor shows type = #.",
            ctx,
        );
        ERRINT(b"#", ICD[3], ctx);
        SIGERR(b"SPICE(CKWRONGDATATYPE)", ctx)?;
        CHKOUT(b"CKNR02", ctx)?;
        return Ok(());
    }

    //
    // The beginning and ending addresses of the segment are in the
    // descriptor.
    //
    BEG = ICD[5];
    END = ICD[6];

    //
    // Calculate the number of pointing records in the segment from
    // the physical size of the segment and knowledge of its structure.
    //
    //    Based on the structure of a type 2 segment, the size of a
    //    segment with N pointing intervals is given as follows:
    //
    //       ARRSIZ  =  PSIZ * N  +  2 * N  +  ( N-1 ) / 100       (1)
    //
    //    In the above equation PSIZ is eight and integer arithmetic is
    //    used.  This equation is equivalent to:
    //
    //
    //       100 * ARRSIZ  =  1000 * N  + ( N-1 ) * 100            (2)
    //                                    -------
    //                                      100
    //
    //    If we can eliminate the integer division then, since all of
    //    the other values represent whole numbers, we can solve the
    //    equation for N in terms of ARRSIZ by using double precision
    //    arithmetic and then rounding the result to the nearest integer.
    //
    //    This next equation uses double precision arithmetic and is
    //    equivalent to (2):
    //
    //       100 * ARRSIZ  = 1000 * N + ( N-1 ) - ( N-1 ) MOD 100  (3)
    //
    //    Which means:
    //
    //       100 * ARRSIZ + 1     ( N-1 ) MOD 100
    //       ----------------  +  ---------------   =   N          (4)
    //            1001                 1001
    //
    //     Since the second term on the left side of (4) is always less
    //     than 0.1, the first term will always round to the correct
    //     value of N.
    //
    ARRSIZ = ((END - BEG) + 1);

    *NREC = intrinsics::IDNINT((((100.0 * (ARRSIZ as f64)) + 1.0) / 1001.0));

    CHKOUT(b"CKNR02", ctx)?;
    Ok(())
}