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//
// GENERATED FILE
//
use super::*;
use crate::SpiceContext;
use f2rust_std::*;
const ISPACE: i32 = 32;
/// First non-blank character
///
/// Return the index of the first non-blank character in
/// a character string.
///
/// # Brief I/O
///
/// ```text
/// VARIABLE I/O DESCRIPTION
/// -------- --- --------------------------------------------------
/// STRING I Input character string.
///
/// The function returns the index of the first non-blank character in
/// STRING.
/// ```
///
/// # Detailed Input
///
/// ```text
/// STRING is the input character string.
/// ```
///
/// # Detailed Output
///
/// ```text
/// The function returns the index if the first non-blank character in
/// the input string. If there are no non-blank characters in the
/// string, FRSTNB is zero.
/// ```
///
/// # Exceptions
///
/// ```text
/// Error free.
/// ```
///
/// # Particulars
///
/// ```text
/// If the string is blank, return zero. Otherwise, step through
/// the string one character at a time until something other than
/// a blank is found. Return the index of that something within
/// the string.
/// ```
///
/// # Examples
///
/// ```text
/// The following examples illustrate the use of FRSTNB.
///
/// FRSTNB ( 'ABCDE' ) = 1
/// FRSTNB ( 'AN EXAMPLE' ) = 1
/// FRSTNB ( ' AN EXAMPLE' ) = 4
/// FRSTNB ( ' ' ) = 0
/// ```
///
/// # Author and Institution
///
/// ```text
/// J. Diaz del Rio (ODC Space)
/// K.R. Gehringer (JPL)
/// W.L. Taber (JPL)
/// I.M. Underwood (JPL)
/// ```
///
/// # Version
///
/// ```text
/// - SPICELIB Version 2.1.0, 08-APR-2021 (JDR)
///
/// Added IMPLICIT NONE statement.
///
/// Edited the header to comply with NAIF standard.
///
/// - SPICELIB Version 2.0.0, 12-MAR-1996 (KRG)
///
/// Modified the comparison to use integer values and the ICHAR()
/// function. This improves the performance of the subroutine.
///
/// - SPICELIB Version 1.0.1, 10-MAR-1992 (WLT)
///
/// Comment section for permuted index source lines was added
/// following the header.
///
/// - SPICELIB Version 1.0.0, 31-JAN-1990 (IMU)
/// ```
pub fn frstnb(string: &str) -> i32 {
let ret = FRSTNB(string.as_bytes());
ret
}
//$Procedure FRSTNB ( First non-blank character )
pub fn FRSTNB(STRING: &[u8]) -> i32 {
let mut FRSTNB: i32 = 0;
//
// Local parameters
//
//
// Local variables
//
//
// Just like it says in the header.
//
if fstr::eq(STRING, b" ") {
FRSTNB = 0;
} else {
for I in 1..=intrinsics::LEN(STRING) {
if (intrinsics::ICHAR(fstr::substr(STRING, I..=I)) != ISPACE) {
FRSTNB = I;
return FRSTNB;
}
}
}
FRSTNB
}