rsspice 0.1.0

//
// GENERATED FILE
//

use super::*;
use f2rust_std::*;

const ITRUE: i32 = 1;
const IFALSE: i32 = -1;
const CTRUE: &[u8] = b"T";
const CFALSE: &[u8] = b"F";
const CNAMSZ: i32 = 32;
const CDOFF: i32 = 24;
const CDSCSZ: i32 = 11;
const CLSIDX: i32 = 1;
const TYPIDX: i32 = (CLSIDX + 1);
const LENIDX: i32 = (TYPIDX + 1);
const SIZIDX: i32 = (LENIDX + 1);
const NAMIDX: i32 = (SIZIDX + 1);
const IXTIDX: i32 = (NAMIDX + 1);
const IXPIDX: i32 = (IXTIDX + 1);
const NFLIDX: i32 = (IXPIDX + 1);
const ORDIDX: i32 = (NFLIDX + 1);
const METIDX: i32 = (ORDIDX + 1);
const EQ: i32 = 1;
const GE: i32 = (EQ + 1);
const GT: i32 = (GE + 1);
const LE: i32 = (GT + 1);
const LT: i32 = (LE + 1);
const NE: i32 = (LT + 1);
const LIKE: i32 = (NE + 1);
const UNLIKE: i32 = (LIKE + 1);
const ISNULL: i32 = (UNLIKE + 1);
const NOTNUL: i32 = (ISNULL + 1);
const SDSCSZ: i32 = 24;
const EKTIDX: i32 = 1;
const SNOIDX: i32 = (EKTIDX + 1);
const IMDIDX: i32 = (SNOIDX + 1);
const TNMIDX: i32 = (IMDIDX + 1);
const NCIDX: i32 = (TNMIDX + 1);
const NRIDX: i32 = (NCIDX + 1);
const RTIDX: i32 = (NRIDX + 1);
const CPTIDX: i32 = (RTIDX + 1);
const DPTIDX: i32 = (CPTIDX + 1);
const IPTIDX: i32 = (DPTIDX + 1);
const MFLIDX: i32 = (IPTIDX + 1);
const IFLIDX: i32 = (MFLIDX + 1);
const SHDIDX: i32 = (IFLIDX + 1);
const CFHIDX: i32 = (SHDIDX + 1);
const CSNIDX: i32 = (CFHIDX + 1);
const LCPIDX: i32 = (CSNIDX + 1);
const LDPIDX: i32 = (LCPIDX + 1);
const LIPIDX: i32 = (LDPIDX + 1);
const LCWIDX: i32 = (LIPIDX + 1);
const LDWIDX: i32 = (LCWIDX + 1);
const LIWIDX: i32 = (LDWIDX + 1);
const NMLIDX: i32 = (LIWIDX + 1);
const CHR: i32 = 1;
const DP: i32 = 2;
const INT: i32 = 3;
const TIME: i32 = 4;

//$Procedure ZZEKLLTC ( EK, last less than, character )
pub fn ZZEKLLTC(
    HANDLE: i32,
    SEGDSC: &[i32],
    COLDSC: &[i32],
    CKEY: &[u8],
    PRVLOC: &mut i32,
    PRVPTR: &mut i32,
    ctx: &mut Context,
) -> f2rust_std::Result<()> {
    let SEGDSC = DummyArray::new(SEGDSC, 1..=SDSCSZ);
    let COLDSC = DummyArray::new(COLDSC, 1..=CDSCSZ);
    let mut COLUMN = [b' '; CNAMSZ as usize];
    let mut BEGIN: i32 = 0;
    let mut BEGPTR: i32 = 0;
    let mut DTYPE: i32 = 0;
    let mut END: i32 = 0;
    let mut ENDPTR: i32 = 0;
    let mut MIDDLE: i32 = 0;
    let mut MIDPTR: i32 = 0;
    let mut NROWS: i32 = 0;
    let mut INDEXD: bool = false;

    //
    // Non-SPICELIB functions
    //

    //
    // Local variables
    //

    //
    // Use discovery check-in.
    //
    //
    // If the column's not indexed, we have no business being here.
    //
    INDEXD = (COLDSC[IXTIDX] != IFALSE);

    if !INDEXD {
        ZZEKCNAM(HANDLE, COLDSC.as_slice(), &mut COLUMN, ctx)?;

        CHKIN(b"ZZEKLLTC", ctx)?;
        SETMSG(b"Column # is not indexed.", ctx);
        ERRCH(b"#", &COLUMN, ctx);
        SIGERR(b"SPICE(NOTINDEXED)", ctx)?;
        CHKOUT(b"ZZEKLLTC", ctx)?;
        return Ok(());
    }

    //
    // Check the column's data type.
    //
    DTYPE = COLDSC[TYPIDX];

    if (DTYPE != CHR) {
        ZZEKCNAM(HANDLE, COLDSC.as_slice(), &mut COLUMN, ctx)?;

        CHKIN(b"ZZEKLLTC", ctx)?;
        SETMSG(b"Column # should be CHR but has type #.", ctx);
        ERRCH(b"#", &COLUMN, ctx);
        ERRINT(b"#", DTYPE, ctx);
        SIGERR(b"SPICE(INVALIDTYPE)", ctx)?;
        CHKOUT(b"ZZEKLLTC", ctx)?;
        return Ok(());
    }

    //
    // Handle the case of an empty segment gracefully.
    //
    NROWS = SEGDSC[NRIDX];

    if (NROWS == 0) {
        *PRVLOC = 0;
        *PRVPTR = 0;

        return Ok(());
    }

    //
    // The algorithm used here is very like unto that used in LSTLTD.
    //
    BEGIN = 1;
    END = NROWS;

    //
    // Get the record pointers BEGPTR and ENDPTR of the least and
    // greatest elements in the column.
    //
    ZZEKIXLK(HANDLE, COLDSC.as_slice(), BEGIN, &mut BEGPTR, ctx)?;
    ZZEKIXLK(HANDLE, COLDSC.as_slice(), END, &mut ENDPTR, ctx)?;

    if ZZEKSCMP(
        GE,
        HANDLE,
        SEGDSC.as_slice(),
        COLDSC.as_slice(),
        BEGPTR,
        1,
        CHR,
        CKEY,
        0.0,
        0,
        false,
        ctx,
    )? {
        //
        // The smallest entry of the column is greater than or equal to
        // the input value of the same data type, so none of the entries
        // are less than the input value.
        //
        *PRVLOC = 0;
        *PRVPTR = 0;
    } else if ZZEKSCMP(
        LT,
        HANDLE,
        SEGDSC.as_slice(),
        COLDSC.as_slice(),
        ENDPTR,
        1,
        CHR,
        CKEY,
        0.0,
        0,
        false,
        ctx,
    )? {
        //
        // The last element of the array is less than the input value of
        // the same data type, so it's the last item less than the input
        // value.
        //
        *PRVLOC = NROWS;

        ZZEKIXLK(HANDLE, COLDSC.as_slice(), *PRVLOC, PRVPTR, ctx)?;
    } else {
        //
        // The input value lies between some pair of column entries.
        // The value is greater than the smallest column entry and
        // less than or equal to the greatest entry.
        //
        while (END > (BEGIN + 1)) {
            //
            // Find the address of the element whose ordinal position
            // is halfway between BEGIN and END.
            //
            MIDDLE = ((BEGIN + END) / 2);

            ZZEKIXLK(HANDLE, COLDSC.as_slice(), MIDDLE, &mut MIDPTR, ctx)?;

            if ZZEKSCMP(
                LT,
                HANDLE,
                SEGDSC.as_slice(),
                COLDSC.as_slice(),
                MIDPTR,
                1,
                CHR,
                CKEY,
                0.0,
                0,
                false,
                ctx,
            )? {
                //
                // The middle value is less than the input value of the
                // same data type.
                //
                BEGIN = MIDDLE;
            } else {
                END = MIDDLE;
            }
            //
            // The input value is greater than the element having ordinal
            // position BEGIN and less than or equal to the element having
            // ordinal position END.
            //
        }

        *PRVLOC = BEGIN;
        ZZEKIXLK(HANDLE, COLDSC.as_slice(), *PRVLOC, PRVPTR, ctx)?;
    }

    Ok(())
}