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//
// GENERATED FILE
//
use super::*;
use crate::SpiceContext;
use f2rust_std::*;
/// Be a decimal number?
///
/// Determine whether a string represents a decimal number.
///
/// # Brief I/O
///
/// ```text
/// VARIABLE I/O DESCRIPTION
/// -------- --- --------------------------------------------------
/// STRING I Character string.
///
/// The function returns .TRUE. if the string represents a decimal
/// number. Otherwise, it returns .FALSE.
/// ```
///
/// # Detailed Input
///
/// ```text
/// STRING is any string.
/// ```
///
/// # Detailed Output
///
/// ```text
/// If the input string contains a decimal number (as defined
/// in $Particulars below), the function returns .TRUE. Otherwise,
/// the functions returns .FALSE.
/// ```
///
/// # Exceptions
///
/// ```text
/// Error free.
/// ```
///
/// # Particulars
///
/// ```text
/// A decimal number may be constructed by concatenating
/// the following components in the order shown.
///
/// 1) A sign ('+' or '-'), or the null string.
///
/// 2) An unsigned integer (as defined by function BEUNS),
/// or the null string.
///
/// 3) A decimal point, or the null string.
///
/// 4) An unsigned integer, or the null string.
/// ```
///
/// # 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 bedec(string: &str) -> bool {
let ret = BEDEC(string.as_bytes());
ret
}
//$Procedure BEDEC ( Be a decimal number? )
pub fn BEDEC(STRING: &[u8]) -> bool {
let mut BEDEC: bool = false;
let mut C: i32 = 0;
let mut D: i32 = 0;
let mut E: i32 = 0;
let mut L: i32 = 0;
//
// SPICELIB functions
//
//
// Local Variables
//
//
// First determine whether or not a decimal point is present.
//
D = POS(STRING, b".", 1);
C = (D - 1);
E = (D + 1);
if (D == 0) {
//
// If there is no decimal point just apply the integer test.
//
BEDEC = BEINT(STRING);
} else {
//
// A decimal point is present, get the length of the string
// and see where the decimal point is relative to the last
// character.
//
L = intrinsics::LEN(STRING);
if (L == 1) {
//
// The string is one character long and a decimal point.
// Sorry, this is not a decimal number.
//
BEDEC = false;
} else if (D == 1) {
//
// The decimal point occurs as the first character of the
// string. The string following it must begin with
// a non-blank character and be an unsigned integer.
//
BEDEC =
(fstr::ne(fstr::substr(STRING, E..=E), b" ") && BEUNS(fstr::substr(STRING, E..)));
} else if (D == L) {
//
// The decimal point is the last character of the string.
// The character that precedes it must be non-blank and
// the substring to the left must be an integer.
//
BEDEC =
(fstr::ne(fstr::substr(STRING, C..=C), b" ") && BEINT(fstr::substr(STRING, 1..=C)));
} else if fstr::eq(fstr::substr(STRING, C..=C), b" ") {
//
// The decimal point occurs somewhere in the middle of the
// string and the character preceding it is blank.
//
BEDEC = ((fstr::ne(fstr::substr(STRING, E..=E), b" ")
&& fstr::eq(fstr::substr(STRING, 1..=C), b" "))
&& BEUNS(fstr::substr(STRING, E..)));
} else if fstr::eq(fstr::substr(STRING, E..=E), b" ") {
//
// Again the decimal point occurs somewhere in the middle of
// the string and the character following it is blank.
//
BEDEC = ((fstr::eq(fstr::substr(STRING, E..=L), b" ")
&& fstr::ne(fstr::substr(STRING, C..=C), b" "))
&& BEINT(fstr::substr(STRING, 1..=C)));
} else if (fstr::eq(fstr::substr(STRING, C..=C), b"-")
|| fstr::eq(fstr::substr(STRING, C..=C), b"+"))
{
//
// The decimal point is in the middle of the string and
// is preceded by a '+' or '-'. There should be nothing
// preceding the sign and what follows the decimal point
// should be an unsigned integer. (we already know that the
// character following the decimal point is not a blank)
//
if (C == 1) {
BEDEC = BEUNS(fstr::substr(STRING, E..=L));
} else {
BEDEC = (BEUNS(fstr::substr(STRING, E..=L))
&& fstr::eq(fstr::substr(STRING, 1..=(C - 1)), b" "));
}
} else {
//
// Last chance, the decimal point is in the middle of the
// string. The characters to the right and left of the
// point are non-blank and we know the character to the
// left of the point is not a sign. The string left must
// be an integer, the string to the right must be an
// unsigned integer.
//
BEDEC = (BEINT(fstr::substr(STRING, 1..=C)) && BEUNS(fstr::substr(STRING, E..=L)));
}
}
BEDEC
}