Initial Commit
+ Basic implementation working with just unsigned ints + Can fetch data from arbitrary bit positions in a byte string + TOML config implementation for describing data + Simple CLIpull/1/head
commit
b85ba31f91
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@ -0,0 +1 @@
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/target
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# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
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[dependencies]
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structopt = "0.3.23"
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serde = { version = "1.0", features = ["derive"] }
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byteorder = "1.4.3"
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@ -0,0 +1,136 @@
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#[derive(Clone, Debug)]
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pub enum ByteStreamError {
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OutOfRange,
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}
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const fn bit_mask(mask: u8) -> u8 {
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match mask {
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0 => 0x00,
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1 => 0x01,
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2 => 0x03,
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3 => 0x07,
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4 => 0x0f,
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5 => 0x1f,
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6 => 0x3f,
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7 => 0x7f,
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_ => 0xff,
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}
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}
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#[derive(Default, Clone, Debug)]
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pub struct ByteStream {
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data: Vec<u8>,
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}
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impl ByteStream {
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pub fn get_bytes(&self, bit_ndx: usize, bit_count: usize) -> Result<Vec<u8>, ByteStreamError> {
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let byte_ndx = bit_ndx / 8;
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let bits_before = (bit_ndx % 8) as u8;
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let bits_in_last_byte = ((bit_ndx + bit_count - bits_before as usize) % 8) as u8;
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let byte_count = if bit_count >= 8 { bit_count / 8 } else { 1 };
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let bytes_needed = if bits_before != 0 {
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byte_count + 1
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} else {
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byte_count
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};
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if bytes_needed > self.data.len() || bytes_needed + byte_ndx > self.data.len() {
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return Err(ByteStreamError::OutOfRange);
|
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}
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let mut byte_stream = self.data[byte_ndx..byte_ndx + bytes_needed].to_vec();
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if bits_before != 0 {
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let mut carry: u8 = 0;
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for _ in 0..bits_before {
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for k in (0..bytes_needed).rev() {
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let next: u8 = (byte_stream[k] & 0x01) << 7;
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byte_stream[k] = (byte_stream[k] >> 1) | carry;
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||||
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||||
carry = next;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
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if bytes_needed > byte_count {
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byte_stream.pop();
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||||
}
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||||
if bits_in_last_byte != 0 {
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||||
*byte_stream.last_mut().unwrap() &= bit_mask(bits_in_last_byte);
|
||||
}
|
||||
|
||||
Ok(byte_stream)
|
||||
}
|
||||
}
|
||||
|
||||
impl From<&[u8]> for ByteStream {
|
||||
fn from(slice: &[u8]) -> Self {
|
||||
ByteStream::from(slice.to_vec())
|
||||
}
|
||||
}
|
||||
|
||||
impl From<Vec<u8>> for ByteStream {
|
||||
fn from(vec: Vec<u8>) -> Self {
|
||||
ByteStream { data: vec }
|
||||
}
|
||||
}
|
||||
|
||||
#[cfg(test)]
|
||||
mod tests {
|
||||
use super::ByteStream;
|
||||
|
||||
#[test]
|
||||
fn test_get_bytes_no_shift() {
|
||||
let bytes: Vec<u8> = vec![0xff, 0x00, 0x55];
|
||||
let bit_stream = ByteStream::from(bytes.clone());
|
||||
|
||||
let new_bytes = bit_stream.get_bytes(0, bytes.len() * 8).unwrap();
|
||||
assert_eq!(bytes, new_bytes);
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn test_get_bytes_with_shift_in_byte() {
|
||||
let bytes: Vec<u8> = vec![0xff, 0x00, 0x55];
|
||||
let bit_stream = ByteStream::from(bytes.clone());
|
||||
|
||||
let new_bytes = bit_stream.get_bytes(4, 4).unwrap();
|
||||
assert_eq!(vec![0x0f], new_bytes);
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn test_get_bytes_with_shift_across_bytes() {
|
||||
let bytes: Vec<u8> = vec![0xff, 0x55];
|
||||
let bit_stream = ByteStream::from(bytes.clone());
|
||||
|
||||
let new_bytes = bit_stream.get_bytes(4, 8).unwrap();
|
||||
assert_eq!(vec![0x5f], new_bytes);
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn test_get_bytes_with_shift_across_bytes_odd() {
|
||||
let bytes: Vec<u8> = vec![0xff, 0x55];
|
||||
let bit_stream = ByteStream::from(bytes.clone());
|
||||
|
||||
let new_bytes = bit_stream.get_bytes(7, 2).unwrap();
|
||||
assert_eq!(vec![0x03], new_bytes);
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn test_get_bytes_one_byte() {
|
||||
let bytes: Vec<u8> = vec![0xff, 0x55];
|
||||
let bit_stream = ByteStream::from(bytes.clone());
|
||||
|
||||
let new_bytes = bit_stream.get_bytes(8, 8).unwrap();
|
||||
assert_eq!(vec![0x55], new_bytes);
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn test_get_bytes_3_bits() {
|
||||
let bytes: Vec<u8> = vec![0x55];
|
||||
let bit_stream = ByteStream::from(bytes.clone());
|
||||
|
||||
let new_bytes = bit_stream.get_bytes(0, 3).unwrap();
|
||||
assert_eq!(vec![0x05], new_bytes);
|
||||
}
|
||||
}
|
||||
|
|
@ -0,0 +1,66 @@
|
|||
use crate::byte_stream::ByteStream;
|
||||
use serde::Deserialize;
|
||||
use std::fmt::Write;
|
||||
|
||||
#[derive(Debug, Deserialize, Clone)]
|
||||
#[serde(tag = "type")]
|
||||
pub enum FieldType {
|
||||
/// Unsigned Int
|
||||
UInt { bit_width: usize },
|
||||
/// Unsigned Int
|
||||
Int { bit_width: usize },
|
||||
/// Null Terminated String Field
|
||||
String { max_len: usize },
|
||||
/// Fixed Byte Length Field
|
||||
Bytes { max_len: usize },
|
||||
}
|
||||
|
||||
#[derive(Debug, Deserialize, Clone)]
|
||||
pub struct Field {
|
||||
/// Field Name
|
||||
pub name: String,
|
||||
/// Field Type
|
||||
pub field_type: FieldType,
|
||||
}
|
||||
|
||||
impl Field {
|
||||
fn format_data(&self, byte_stream: &ByteStream, bit_ndx: usize) -> (String, usize) {
|
||||
match self.field_type {
|
||||
FieldType::UInt { bit_width } => {
|
||||
let bytes = byte_stream.get_bytes(bit_ndx, bit_width).unwrap();
|
||||
let mut string = String::with_capacity(bytes.len() * 2);
|
||||
|
||||
for byte in bytes.iter().rev() {
|
||||
string.push_str(&format!("{:x}", byte))
|
||||
}
|
||||
|
||||
(string, bit_width)
|
||||
}
|
||||
_ => ("".to_string(), 0),
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
#[derive(Debug, Deserialize, Clone)]
|
||||
pub struct Format {
|
||||
/// Format Name
|
||||
pub name: String,
|
||||
/// Elements of the format
|
||||
pub fields: Vec<Field>,
|
||||
}
|
||||
|
||||
impl Format {
|
||||
pub fn format_data(&self, data: &[u8]) -> String {
|
||||
let mut s = String::new();
|
||||
let byte_stream = ByteStream::from(data);
|
||||
let mut bit_ndx: usize = 0;
|
||||
|
||||
for field in &self.fields {
|
||||
let (data_str, bit_width) = field.format_data(&byte_stream, bit_ndx);
|
||||
bit_ndx += bit_width;
|
||||
writeln!(s, "{}: {}", field.name, data_str).unwrap();
|
||||
}
|
||||
|
||||
s
|
||||
}
|
||||
}
|
||||
|
|
@ -0,0 +1,24 @@
|
|||
pub mod format;
|
||||
|
||||
use crate::formatter::format::Format;
|
||||
use serde::Deserialize;
|
||||
use std::fs::File;
|
||||
use std::io::Read;
|
||||
use std::path::Path;
|
||||
|
||||
#[derive(Debug, Deserialize, Clone)]
|
||||
pub struct FormatConfig {
|
||||
pub formats: Vec<Format>,
|
||||
}
|
||||
|
||||
impl FormatConfig {
|
||||
pub fn new(config_path: &Path) -> Result<Self, std::io::Error> {
|
||||
let mut config = File::open(config_path)?;
|
||||
|
||||
let mut contents = String::new();
|
||||
|
||||
config.read_to_string(&mut contents)?;
|
||||
|
||||
Ok(toml::from_str(&contents).unwrap())
|
||||
}
|
||||
}
|
||||
|
|
@ -0,0 +1,37 @@
|
|||
use crate::parser::parse_bytes_from_input_arg;
|
||||
use formatter::FormatConfig;
|
||||
use std::path::PathBuf;
|
||||
use structopt::StructOpt;
|
||||
|
||||
mod byte_stream;
|
||||
mod formatter;
|
||||
mod parser;
|
||||
|
||||
#[derive(Debug, StructOpt)]
|
||||
#[structopt(name = "Formaty", about = "Arbitrary Binary Data Formatting")]
|
||||
pub struct Args {
|
||||
#[structopt(parse(from_os_str))]
|
||||
config: PathBuf,
|
||||
|
||||
format: String,
|
||||
|
||||
data: Vec<String>,
|
||||
}
|
||||
|
||||
fn main() {
|
||||
let args: Args = Args::from_args();
|
||||
|
||||
let config = FormatConfig::new(&args.config).unwrap();
|
||||
|
||||
let format = match config.formats.iter().find(|f| f.name == args.format) {
|
||||
None => {
|
||||
println!("Format not found in config file");
|
||||
return;
|
||||
}
|
||||
Some(format) => format,
|
||||
};
|
||||
|
||||
let data = parse_bytes_from_input_arg(args.data).unwrap();
|
||||
|
||||
println!("{}", format.format_data(&data));
|
||||
}
|
||||
|
|
@ -0,0 +1,52 @@
|
|||
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)
|
||||
}
|
||||
}
|
||||
|
||||
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..], 1)
|
||||
} else if element.starts_with('h') || element.starts_with('h') {
|
||||
u8::from_str_radix(&element[1..], 16)
|
||||
} else if let Some(value) = element.strip_prefix('0') {
|
||||
u8::from_str_radix(value, 8)
|
||||
} else {
|
||||
str::parse(element)
|
||||
}
|
||||
})
|
||||
.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)
|
||||
}
|
||||
Loading…
Reference in New Issue