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//
// GENERATED FILE
//
use super::*;
use crate::SpiceContext;
use f2rust_std::*;
/// Be a number?
///
/// Determine whether a string represents a number.
///
/// # Brief I/O
///
/// ```text
/// VARIABLE I/O DESCRIPTION
/// -------- --- --------------------------------------------------
/// STRING I Character string.
///
/// The function returns .TRUE. if the string is a number.
/// Otherwise, it returns .FALSE.
/// ```
///
/// # Detailed Input
///
/// ```text
/// STRING is any string.
/// ```
///
/// # Detailed Output
///
/// ```text
/// If the input string contains a number (as defined in
/// $Particulars below) the function returns .TRUE. Otherwise,
/// the function returns .FALSE.
/// ```
///
/// # Exceptions
///
/// ```text
/// Error free.
/// ```
///
/// # Particulars
///
/// ```text
/// A number may be either of the following:
///
/// 1) A decimal number (as defined by function BEDEC).
///
/// 2) A decimal number followed by an exponent character
/// ('E', 'e', 'D', or 'd') and an integer (as defined
/// by function BEINT).
/// ```
///
/// # Examples
///
/// ```text
/// Four classes of numbers recognized by the various BE functions.
///
/// UNS unsigned integer
/// INT integer (includes INT)
/// DEC decimal number (includes UNS, INT)
/// NUM number (includes UNS, INT, NUM)
///
/// The following table illustrates the differences between
/// the classes. (Any number of leading and trailing blanks
/// are acceptable.)
///
/// String Accepted by
/// ------------------ ------------------
/// 0 UNS, INT, DEC, NUM
/// 21
/// 21994217453648
///
/// +0 INT, DEC, NUM
/// -13
/// +21946
///
/// 1.23 DEC, NUM
/// 12.
/// .17
/// +4.1
/// -.25
///
/// 2.3e17 NUM
/// 17.D-13275849
/// -.194265E+0004
///
/// Note that the functions don't take the magnitudes of the numbers
/// into account. They may accept numbers that cannot be represented
/// in Fortran variables. (For example, '2.19E999999999999' probably
/// exceeds the maximum floating point number on any machine, but
/// is perfectly acceptable to BENUM.)
///
/// The following strings are not accepted by any of the functions.
///
/// String Reason
/// --------------- ----------------------------------------
/// 3/4 No implied operations (rational numbers)
/// 37+14 No explicit operations
/// E12 Must have mantissa
/// 217,346.91 No commas
/// 3.14 159 264 No embedded spaces
/// PI No special numbers
/// FIVE No textual numbers
/// CXIV No roman numerals
/// ```
///
/// # Author and Institution
///
/// ```text
/// J. Diaz del Rio (ODC Space)
/// W.L. Taber (JPL)
/// ```
///
/// # Version
///
/// ```text
/// - SPICELIB Version 1.1.0, 24-NOV-2021 (JDR)
///
/// Added IMPLICIT NONE statement.
///
/// Edited the header to comply with NAIF standard.
///
/// - SPICELIB Version 1.0.0, 01-DEC-1995 (WLT)
/// ```
pub fn benum(string: &str) -> bool {
let ret = BENUM(string.as_bytes());
ret
}
//$Procedure BENUM ( Be a number? )
pub fn BENUM(STRING: &[u8]) -> bool {
let mut BENUM: bool = false;
let mut D: i32 = 0;
let mut E: i32 = 0;
let mut F: i32 = 0;
let mut L: i32 = 0;
//
// SPICELIB functions
//
//
// Local Variables
//
//
// Determine whether or not there is an exponent character in the
// string.
//
L = intrinsics::LEN(STRING);
E = CPOS(STRING, b"EeDd", 1);
D = (E - 1);
F = (E + 1);
if (E == 0) {
//
// There is no exponent character, this is a number if it
// is a decimal number.
//
BENUM = BEDEC(STRING);
} else if ((E == 1) || (E == L)) {
BENUM = false;
} else if (fstr::eq(fstr::substr(STRING, D..=D), b" ")
|| fstr::eq(fstr::substr(STRING, F..=F), b" "))
{
BENUM = false;
} else {
BENUM = (BEDEC(fstr::substr(STRING, 1..=D)) && BEINT(fstr::substr(STRING, F..=L)));
}
BENUM
}