ctoolbox/formats/eite/util/
pred.rs

1//! Character tests
2
3use crate::formats::eite::{
4    encoding::ascii::byte_from_stagel_char, util::math::int_is_between_i32,
5};
6
7pub fn is_byte(v: i32) -> bool {
8    int_is_between_i32(v, 0, 255)
9}
10pub fn is_int_bit(v: i32) -> bool {
11    v == 0 || v == 1
12}
13pub fn is_char_byte(v: i32) -> bool {
14    int_is_between_i32(v, 32, 126)
15}
16
17pub fn is_char_str(s: &str) -> bool {
18    if s.chars().count() != 1 {
19        return false;
20    }
21    let b = byte_from_stagel_char(s);
22    if let Err(_) = b {
23        return false;
24    }
25    is_char_byte(i32::from(b.unwrap()))
26}
27
28// ---------------
29// Ident validation (lowercase first letter, then alnum)
30// ---------------
31
32pub fn is_valid_ident(s: &str) -> bool {
33    if s.is_empty() {
34        return false;
35    }
36    let mut chars = s.chars();
37    let first = chars.next().unwrap();
38    if !first.is_ascii_lowercase() {
39        return false;
40    }
41    chars.all(|c| c.is_ascii_alphanumeric())
42}
43
44#[cfg(test)]
45mod tests {
46    use super::*;
47
48    #[crate::ctb_test]
49    fn test_ident_validation() {
50        assert!(is_valid_ident("abc1"));
51        assert!(!is_valid_ident("Abc"));
52        assert!(!is_valid_ident("a-b"));
53    }
54}
ctoolbox/formats/eite/util/pred.rs

ctoolbox/formats/eite/util/
pred.rs
