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//
// GENERATED FILE
//
use super::*;
use crate::SpiceContext;
use f2rust_std::*;
/// Transpose a matrix, 3x3
///
/// Transpose a 3x3 matrix.
///
/// # Brief I/O
///
/// ```text
/// VARIABLE I/O DESCRIPTION
/// -------- --- --------------------------------------------------
/// M1 I 3x3 matrix to be transposed.
/// MOUT O Transpose of M1.
/// ```
///
/// # Detailed Input
///
/// ```text
/// M1 is any double precision 3x3 matrix.
/// ```
///
/// # Detailed Output
///
/// ```text
/// MOUT is a double precision, 3x3 matrix which contains the
/// transpose of M1.
/// ```
///
/// # Exceptions
///
/// ```text
/// Error free.
/// ```
///
/// # Particulars
///
/// ```text
/// XPOSE first copies the diagonal elements of M1 to MOUT. Then
/// the off-diagonal elements are transposed using a temporary
/// variable in the following order:
///
/// (1,2) <---> (2,1)
/// (1,3) <---> (3,1)
/// (2,3) <---> (3,2)
/// ```
///
/// # 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) Given a 3x3 double precision matrix, find its transpose.
///
///
/// Example code begins here.
///
///
/// PROGRAM XPOSE_EX1
/// IMPLICIT NONE
///
/// C
/// C Local variables.
/// C
/// DOUBLE PRECISION M1 (3,3)
/// DOUBLE PRECISION MOUT (3,3)
///
/// INTEGER I
/// INTEGER J
///
/// C
/// C Define the input matrix.
/// C
/// DATA M1 / 1.0D0, 0.0D0, 0.0D0,
/// . 2.0D0, 4.0D0, 6.0D0,
/// . 3.0D0, 5.0D0, 0.0D0 /
///
/// C
/// C Compute the transpose of M1.
/// C
/// CALL XPOSE ( M1, MOUT )
///
/// C
/// C Display the results.
/// C
/// WRITE(*,*) 'Input matrix (M1):'
/// WRITE(*,*)
/// DO I= 1, 3
/// WRITE(*,'(3F6.1)') ( M1(I,J), J= 1, 3 )
/// END DO
/// WRITE(*,*)
/// WRITE(*,*) 'Transpose of M1:'
/// WRITE(*,*)
/// DO I= 1, 3
/// WRITE(*,'(3F6.1)') ( MOUT(I,J), J= 1, 3 )
/// END DO
///
/// END
///
///
/// When this program was executed on a Mac/Intel/gfortran/64-bit
/// platform, the output was:
///
///
/// Input matrix (M1):
///
/// 1.0 2.0 3.0
/// 0.0 4.0 5.0
/// 0.0 6.0 0.0
///
/// Transpose of M1:
///
/// 1.0 0.0 0.0
/// 2.0 4.0 6.0
/// 3.0 5.0 0.0
/// ```
///
/// # Author and Institution
///
/// ```text
/// N.J. Bachman (JPL)
/// J. Diaz del Rio (ODC Space)
/// W.M. Owen (JPL)
/// W.L. Taber (JPL)
/// ```
///
/// # Version
///
/// ```text
/// - SPICELIB Version 1.1.0, 06-JUL-2021 (JDR)
///
/// Added IMPLICIT NONE statement.
///
/// Edited the header to comply with NAIF standard. Added complete
/// code example.
///
/// - SPICELIB Version 1.0.2, 23-APR-2010 (NJB)
///
/// Header correction: assertions that the output
/// can overwrite the input have been removed.
///
/// - SPICELIB Version 1.0.1, 10-MAR-1992 (WLT)
///
/// Comment section for permuted index source lines was added
/// following the header.
///
/// - SPICELIB Version 1.0.0, 31-JAN-1990 (WMO)
/// ```
pub fn xpose(m1: &[[f64; 3]; 3], mout: &mut [[f64; 3]; 3]) {
XPOSE(m1.as_flattened(), mout.as_flattened_mut());
}
//$Procedure XPOSE ( Transpose a matrix, 3x3 )
pub fn XPOSE(M1: &[f64], MOUT: &mut [f64]) {
let M1 = DummyArray2D::new(M1, 1..=3, 1..=3);
let mut MOUT = DummyArrayMut2D::new(MOUT, 1..=3, 1..=3);
let mut TEMP: f64 = 0.0;
//
// Local variables
//
//
// Move the three diagonal elements from M1 to MOUT
//
MOUT[[1, 1]] = M1[[1, 1]];
MOUT[[2, 2]] = M1[[2, 2]];
MOUT[[3, 3]] = M1[[3, 3]];
//
// Switch the three pairs of off-diagonal elements
//
TEMP = M1[[1, 2]];
MOUT[[1, 2]] = M1[[2, 1]];
MOUT[[2, 1]] = TEMP;
TEMP = M1[[1, 3]];
MOUT[[1, 3]] = M1[[3, 1]];
MOUT[[3, 1]] = TEMP;
TEMP = M1[[2, 3]];
MOUT[[2, 3]] = M1[[3, 2]];
MOUT[[3, 2]] = TEMP;
}