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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 integers from text file
///
/// Read N encoded integers from a text file, decoding them into
/// their equivalent integers.
///
/// # Brief I/O
///
/// ```text
/// VARIABLE I/O DESCRIPTION
/// -------- --- --------------------------------------------------
/// UNIT I Fortran unit number of input text file.
/// N I Number of integers to read and decode.
/// DATA O List of decoded integers.
/// ```
///
/// # 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 integers to be read from the
/// text file attached to UNIT.
/// ```
///
/// # Detailed Output
///
/// ```text
/// DATA is the list of decoded integers 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 integers beginning at 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
/// integers will be decoded and placed into a list of integers
/// which will be passed back to the caller. The encoded integers
/// 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 integers:
///
/// WRENCI -- Encode and write integers to a file.
/// RDENCI -- Read and decode integers from a file.
///
/// The encoding/decoding of integers is performed to provide a
/// portable means for transferring data values.
///
/// Currently the encoded integers are represented as signed
/// hexadecimal numbers See INT2HX.FOR and HX2INT.FOR for details.
/// ```
///
/// # Examples
///
/// ```text
/// Suppose we have the following input file which contains the values
/// 1 - 100 encoded, and that the input file has already been opened
/// for reading. The arrow, '-->', indicates the current position in
/// the file.
///
/// -->'1' '2' '3' '4' '5' '6' '7' '8' '9' 'A' 'B' 'C' 'D' 'E'
/// 'F' '10' '11' '12' '13' '14' '15' '16' '17' '18' '19'
/// '1A' '1B' '1C' '1D' '1E' '1F' '20' '21' '22' '23' '24'
/// '25' '26' '27' '28' '29' '2A' '2B' '2C' '2D' '2E' '2F'
/// '30' '31' '32' '33' '34' '35' '36' '37' '38' '39' '3A'
/// '3B' '3C' '3D' '3E' '3F' '40'
/// '41' '42' '43' '44' '45' '46' '47' '48' '49' '4A' '4B'
/// '4C' '4D' '4E' '4F' '50' '51' '52' '53' '54' '55' '56'
/// '57' '58' '59' '5A' '5B' '5C' '5D' '5E' '5F' '60' '61'
/// '62' '63' '64'
///
/// Then, the following code fragment would read and decode these
/// 100 values.
///
/// N = 100
/// CALL RDENCI( UNIT, N, DATA )
///
/// Upon returning, the array data would contain the values 1 - 100.
/// ```
///
/// # Author and Institution
///
/// ```text
/// J. Diaz del Rio (ODC Space)
/// K.R. Gehringer (JPL)
/// ```
///
/// # Version
///
/// ```text
/// - SPICELIB Version 1.1.0, 03-JUN-2021 (JDR)
///
/// Added IMPLICIT NONE statement.
///
/// Edited the header to comply with NAIF standard. Fixed I/O type
/// of argument DATA in $Brief_I/O table.
///
/// - SPICELIB Version 1.0.0, 19-OCT-1992 (KRG)
/// ```
pub fn rdenci(ctx: &mut SpiceContext, unit: i32, n: i32, data: &mut [i32]) -> crate::Result<()> {
RDENCI(unit, n, data, ctx.raw_context())?;
ctx.handle_errors()?;
Ok(())
}
//$Procedure RDENCI ( Read encoded integers from text file )
pub fn RDENCI(UNIT: i32, N: i32, DATA: &mut [i32], 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 IOSTAT: i32 = 0;
let mut ITMBEG: i32 = 0;
let mut NITMS: 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"RDENCI", 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"RDENCI", 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 a 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 = #.", ctx);
ERRINT(b"#", UNIT, ctx);
ERRINT(b"#", IOSTAT, ctx);
SIGERR(b"SPICE(FILEREADFAILED)", ctx)?;
CHKOUT(b"RDENCI", 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 {
HX2INT(
&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"RDENCI", 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"RDENCI", ctx)?;
Ok(())
}