formaty/src/parser/mod.rs

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Rust
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use std::fmt::{Display, Formatter};
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use std::num::ParseIntError;
#[derive(Debug, Clone)]
pub enum ByteArrayParseErr {
EmptySrcArray,
ParseIntError(ParseIntError),
}
impl From<ParseIntError> for ByteArrayParseErr {
fn from(e: ParseIntError) -> Self {
ByteArrayParseErr::ParseIntError(e)
}
}
impl Display for ByteArrayParseErr {
fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
let err_msg = match self {
ByteArrayParseErr::EmptySrcArray => "Provided array is empty!".to_string(),
ByteArrayParseErr::ParseIntError(e) => format!("Failed to parse as int: {}", e),
};
write!(f, "{}", err_msg)
}
}
fn bytes_from_str_array(src: Vec<String>) -> Result<Vec<u8>, ByteArrayParseErr> {
src.iter()
.map(|element| {
if element.starts_with("0x") || element.starts_with("0X") {
u8::from_str_radix(&element[2..], 16)
} else if element.starts_with("0b") || element.starts_with("0B") {
u8::from_str_radix(&element[2..], 2)
} else if element.starts_with('h') || element.starts_with('H') {
u8::from_str_radix(&element[1..], 16)
} else if element.len() > 1 && element.starts_with('0') {
u8::from_str_radix(&element[1..], 8)
} else {
element.parse()
}
})
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.map(|e| e.map_err(ByteArrayParseErr::from))
.collect()
}
pub fn parse_bytes_from_input_arg(src: Vec<String>) -> Result<Vec<u8>, ByteArrayParseErr> {
if src.is_empty() {
return Err(ByteArrayParseErr::EmptySrcArray);
}
let str_arr = if src.len() == 1 {
src[0]
.replace(',', " ")
.replace('[', "")
.replace(']', "")
.split_whitespace()
.map(|s| s.to_string())
.collect()
} else {
src
};
bytes_from_str_array(str_arr)
}
#[cfg(test)]
mod tests {
use crate::parser::parse_bytes_from_input_arg;
#[test]
fn parse_base_10_array() {
let array = vec!["[0, 1, 2, 3, 4]".to_string()];
let out = parse_bytes_from_input_arg(array).unwrap();
assert_eq!(out, vec![0, 1, 2, 3, 4])
}
#[test]
fn parse_base_2_array() {
let array = vec!["[0b0, 0b1, 0b10, 0b11, 0b100]".to_string()];
let out = parse_bytes_from_input_arg(array).unwrap();
assert_eq!(out, vec![0, 1, 2, 3, 4])
}
#[test]
fn parse_base_8_array() {
let array = vec!["[00, 01, 02, 03, 04]".to_string()];
let out = parse_bytes_from_input_arg(array).unwrap();
assert_eq!(out, vec![0, 1, 2, 3, 4])
}
#[test]
fn parse_base_16_array() {
let array = vec!["[0x0, 0x1, 0x2, h3, H4]".to_string()];
let out = parse_bytes_from_input_arg(array).unwrap();
assert_eq!(out, vec![0, 1, 2, 3, 4])
}
#[test]
fn parse_base_mixed() {
let array = vec!["[00 0x1, 2, h3, H4]".to_string()];
let out = parse_bytes_from_input_arg(array).unwrap();
assert_eq!(out, vec![0, 1, 2, 3, 4])
}
#[test]
fn parse_no_braces_multi_args() {
let array = vec![
"0".to_string(),
"1".to_string(),
"2".to_string(),
"3".to_string(),
"4".to_string(),
];
let out = parse_bytes_from_input_arg(array).unwrap();
assert_eq!(out, vec![0, 1, 2, 3, 4])
}
#[test]
fn parse_no_braces_one_arg() {
let array = vec!["0 1 2 3 4".to_string()];
let out = parse_bytes_from_input_arg(array).unwrap();
assert_eq!(out, vec![0, 1, 2, 3, 4])
}
}