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//
// GENERATED FILE
//
use super::*;
use crate::SpiceContext;
use f2rust_std::*;
const ERRLEN: i32 = 80;
const MAXENC: i32 = 64;
const WRKSIZ: i32 = 64;
/// Read encoded d.p. numbers from file
///
/// Read N encoded d.p. numbers from a text file, decoding them
/// into their equivalent d.p. numbers.
///
/// # Brief I/O
///
/// ```text
/// VARIABLE I/O DESCRIPTION
/// -------- --- --------------------------------------------------
/// UNIT I Fortran unit number of input text file.
/// N I Number of d.p. numbers to read and decode.
/// DATA O List of decoded d.p. numbers.
/// ```
///
/// # Detailed Input
///
/// ```text
/// UNIT is the Fortran unit number for a previously opened text
/// file. All reading will begin at the CURRENT POSITION
/// in the text file.
///
/// N is the number of encoded double precision numbers, to be
/// read from the text file attached to UNIT.
/// ```
///
/// # Detailed Output
///
/// ```text
/// DATA is the list of decoded double precision numbers read from
/// the text file attached to UNIT.
/// ```
///
/// # Exceptions
///
/// ```text
/// 1) If N, the number of data items, is not positive, the error
/// SPICE(INVALIDARGUMENT) is signaled.
///
/// 2) If an error occurs while reading from the text file attached
/// to UNIT, the error SPICE(FILEREADFAILED) is signaled.
///
/// 3) If an error occurs while decoding a number, the error
/// SPICE(DECODINGERROR) is signaled.
/// ```
///
/// # Files
///
/// ```text
/// See the description of UNIT in $Detailed_Input.
/// ```
///
/// # Particulars
///
/// ```text
/// This routine will read N encoded double precision numbers from
/// the current position in a previously opened text file. The
/// current position in a file is defined to be the text line
/// immediately following the last text line that was written or
/// read. The numbers will be decoded and placed into a list of
/// double precision numbers which will be passed back to the caller.
/// The encoded double precision numbers are represented as quoted
/// character strings so that a Fortran list directed read may be
/// used to read the encoded values, rather than a formatted read
/// with the format specifier FMT = '(A)'.
///
/// This routine is one of a pair of routines which are used to
/// encode and decode d.p. numbers:
///
/// WRENCD -- Encode and write d.p. numbers to a file.
/// RDENCD -- Read and decode d.p. numbers from a file.
///
/// The encoding/decoding of d.p. numbers is performed to provide a
/// portable means for transferring data values.
///
/// Currently the encoded d.p. numbers are represented in a base
/// 16 ``scientific notation.'' See DP2HX.FOR and HX2DP.FOR for
/// details.
/// ```
///
/// # Examples
///
/// ```text
/// Suppose we have the following input file which contains the
/// values 1.0D0 - 100.0D0 in encoded format, and that the input
/// file has already been opened for reading. The arrow, '-->',
/// indicates the current position in the file.
///
/// -->'1^1' '2^1' '3^1' '4^1' '5^1' '6^1' '7^1' '8^1' '9^1'
/// 'A^1' 'B^1' 'C^1' 'D^1' 'E^1' 'F^1' '1^2' '11^2' '12^2'
/// '13^2' '14^2' '15^2' '16^2' '17^2' '18^2' '19^2' '1A^2'
/// '1B^2' '1C^2' '1D^2' '1E^2' '1F^2' '2^2' '21^2' '22^2'
/// '23^2' '24^2' '25^2' '26^2' '27^2' '28^2' '29^2' '2A^2'
/// '2B^2' '2C^2' '2D^2' '2E^2' '2F^2' '3^2' '31^2' '32^2'
/// '33^2' '34^2' '35^2' '36^2' '37^2' '38^2' '39^2' '3A^2'
/// '3B^2' '3C^2' '3D^2' '3E^2' '3F^2' '4^2'
/// '41^2' '42^2' '43^2' '44^2' '45^2' '46^2' '47^2' '48^2'
/// '49^2' '4A^2' '4B^2' '4C^2' '4D^2' '4E^2' '4F^2' '5^2'
/// '51^2' '52^2' '53^2' '54^2' '55^2' '56^2' '57^2' '58^2'
/// '59^2' '5A^2' '5B^2' '5C^2' '5D^2' '5E^2' '5F^2' '6^2'
/// '61^2' '62^2' '63^2' '64^2'
///
/// Then the following code fragment would read and decode these
/// 100 values.
///
/// N = 100
/// CALL RDENCD( UNIT, N, DATA )
///
/// Upon returning, the array data would contain the values
/// 1.0D0 - 100.0D0.
/// ```
///
/// # Author and Institution
///
/// ```text
/// J. Diaz del Rio (ODC Space)
/// K.R. Gehringer (JPL)
/// F.S. Turner (JPL)
/// ```
///
/// # Version
///
/// ```text
/// - SPICELIB Version 1.2.0, 03-JUN-2021 (JDR)
///
/// Added IMPLICIT NONE statement.
///
/// Edited the header to comply with NAIF standard. Fixed I/O type
/// of argument DATA in $Brief_I/O table.
///
/// - SPICELIB Version 1.1.0, 19-MAR-1999 (FST)
///
/// Modified the long error message for SPICE(FILEREADFAILED)
/// to indicate the possibility of an incomplete text transfer
/// file as the cause.
///
/// - SPICELIB Version 1.0.0, 20-OCT-1992 (KRG)
/// ```
pub fn rdencd(ctx: &mut SpiceContext, unit: i32, n: i32, data: &mut [f64]) -> crate::Result<()> {
RDENCD(unit, n, data, ctx.raw_context())?;
ctx.handle_errors()?;
Ok(())
}
//$Procedure RDENCD ( Read encoded d.p. numbers from file )
pub fn RDENCD(UNIT: i32, N: i32, DATA: &mut [f64], ctx: &mut Context) -> f2rust_std::Result<()> {
let mut DATA = DummyArrayMut::new(DATA, 1..);
let mut ERRMSG = [b' '; ERRLEN as usize];
let mut WORK = ActualCharArray::new(MAXENC, 1..=WRKSIZ);
let mut ITMBEG: i32 = 0;
let mut NITMS: i32 = 0;
let mut IOSTAT: i32 = 0;
let mut ERROR: bool = false;
//
// SPICELIB functions
//
//
// Local parameters
//
//
// Local variables
//
//
// Standard SPICE error handling.
//
if RETURN(ctx) {
return Ok(());
} else {
CHKIN(b"RDENCD", ctx)?;
}
//
// Check to see if the number of data items is less than or equal
// to zero. If it is, signal an error.
//
if (N < 1) {
SETMSG(
b"The number of data items to be read was not positive: #.",
ctx,
);
ERRINT(b"#", N, ctx);
SIGERR(b"SPICE(INVALIDARGUMENT)", ctx)?;
CHKOUT(b"RDENCD", ctx)?;
return Ok(());
}
//
// Initialize the beginning location to place the decoded data
// items.
//
ITMBEG = 1;
//
// We read in the encoded numbers in blocks of size WRKSIZ, and if
// there was not a read error we will attempt to decode the numbers.
// We signal an error if either:
//
// (1) there is a read error
// (2) there is an error decoding the number.
//
// NOTE: EOF is interpreted as a read error because we know a priori
// exactly how many data items we need to read: N.
//
// Begin decoding the encoded data items read from the input file
// in blocks of size NITMS. Each time the number of data items
// NITMS is reached, decode the encoded numbers into the data array.
//
while (ITMBEG <= N) {
//
// The number of items is either the size of the workspace, or
// the number of data items which remain to be processed, which
// should always be less than or equal to the size of the
// workspace.
//
NITMS = intrinsics::MIN0(&[WRKSIZ, ((N - ITMBEG) + 1)]);
//
// Read in a block of data items to be decoded.
//
{
use f2rust_std::{
data::Val,
io::{self, Reader},
};
let mut reader = io::ListDirectedReader::new(ctx.io_unit(UNIT)?, None)?;
IOSTAT = io::capture_iostat(|| {
reader.start()?;
for I in intrinsics::range(1, NITMS, 1) {
reader.read_str(&mut WORK[I])?;
}
reader.finish()?;
Ok(())
})?;
}
//
// Check to see if we got a read error: IOSTAT .NE. 0. If we did,
// then signal an error. EOF is considered to be a read error,
// since we know exactly how many data items we expect to read.
//
if (IOSTAT != 0) {
SETMSG(b"Error reading from logical unit #, IOSTAT = #. One possible cause is an incomplete text transfer file.", ctx);
ERRINT(b"#", UNIT, ctx);
ERRINT(b"#", IOSTAT, ctx);
SIGERR(b"SPICE(FILEREADFAILED)", ctx)?;
CHKOUT(b"RDENCD", ctx)?;
return Ok(());
}
//
// Begin to decode the data items into the data array. Signal an
// error if we cannot decode a data item.
//
for I in 1..=NITMS {
HX2DP(
&WORK[I],
&mut DATA[((ITMBEG + I) - 1)],
&mut ERROR,
&mut ERRMSG,
ctx,
);
if ERROR {
SETMSG(
b"Decoding error occurred while attempting to decode item #: #. #",
ctx,
);
ERRINT(b"#", I, ctx);
ERRCH(b"#", &WORK[I], ctx);
ERRCH(b"#", &ERRMSG, ctx);
SIGERR(b"SPICE(DECODINGERROR)", ctx)?;
CHKOUT(b"RDENCD", ctx)?;
return Ok(());
}
}
//
// Position the data item pointer at the next location to begin
// placing the decoded items in the array DATA, and continue
// processing the until done.
//
ITMBEG = (ITMBEG + NITMS);
}
CHKOUT(b"RDENCD", ctx)?;
Ok(())
}