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239
members/libpt-bintols/src/hedu/mod.rs
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@ -1,239 +0,0 @@
//! # Dump data
//!
//! This crate is part of [`pt`](../libpt/index.html), but can also be used as a standalone
//! module.
//!
//! Hedu is made for hexdumping data. `libpt` offers a cli application using this module.
use crate::display::humanbytes;
use anyhow::{bail, Result};
use libpt_log::{debug, error, trace, warn};
use std::io::{prelude::*, Read, SeekFrom};
pub const BYTES_PER_LINE: usize = 16;
pub const LINE_SEP_HORIZ: char = '─';
pub const LINE_SEP_VERT: char = '│';
pub const CHAR_BORDER: &'static str = "|";
#[derive(Debug)]
pub struct Hedu {
pub chars: bool,
pub skip: usize,
pub show_identical: bool,
pub limit: usize,
stop: bool,
len: usize,
data_idx: usize,
rd_counter: usize,
buf: [[u8; BYTES_PER_LINE]; 2],
alt_buf: usize,
pub display_buf: String,
first_iter: bool,
}
impl Hedu {
pub fn new(chars: bool, skip: usize, show_identical: bool, limit: usize) -> Self {
Hedu {
chars,
skip,
show_identical,
limit,
stop: false,
len: 0,
data_idx: 0,
rd_counter: 0,
buf: [[0; BYTES_PER_LINE]; 2],
alt_buf: 0,
display_buf: String::new(),
first_iter: true,
}
}
#[inline]
pub fn display(&mut self) {
println!("{}", self.display_buf);
self.display_buf = String::new();
}
#[inline]
pub fn sep(&mut self) {
if self.chars {
self.display_buf += &format!("{LINE_SEP_HORIZ}").repeat(80);
} else {
self.display_buf += &format!("{LINE_SEP_HORIZ}").repeat(59);
}
self.display();
}
#[inline]
pub fn newline(&mut self) {
self.display_buf += "\n";
self.display();
}
fn dump_a_line(&mut self) {
self.display_buf += &format!("{:08X} {LINE_SEP_VERT} ", self.data_idx);
if self.len != 0 {
for i in 0..self.len {
if i as usize % BYTES_PER_LINE == BYTES_PER_LINE / 2 {
self.display_buf += " ";
}
self.display_buf += &format!("{:02X} ", self.buf[self.alt_buf][i]);
}
if self.len == BYTES_PER_LINE / 2 {
self.display_buf += " "
}
for i in 0..(BYTES_PER_LINE - self.len) {
if i as usize % BYTES_PER_LINE == BYTES_PER_LINE / 2 {
self.display_buf += " ";
}
self.display_buf += " ";
}
} else {
self.display_buf += &format!("{:49}", "");
}
if self.chars {
self.display_buf += &format!("{LINE_SEP_VERT} ");
if self.len != 0 {
self.display_buf += CHAR_BORDER;
for i in 0..self.len {
self.display_buf +=
&format!("{}", mask_chars(self.buf[self.alt_buf][i] as char));
}
self.display_buf += CHAR_BORDER;
} else {
self.display_buf += &format!("{:^8}", "");
}
}
self.display();
}
fn skip_lines(&mut self, data: &mut dyn DataSource) -> Result<()> {
trace!(buf = format!("{:?}", self.buf), "found a duplicating line");
let start_line = self.data_idx;
while self.buf[0] == self.buf[1] && self.len == BYTES_PER_LINE {
self.rd_data(data)?;
}
self.display_buf += &format!(
"******** {LINE_SEP_VERT} {:<49}",
format!(
"(repeats {} lines)",
self.data_idx - start_line / (BYTES_PER_LINE) + 1
)
);
if self.chars {
self.display_buf += &format!("{LINE_SEP_VERT}");
}
trace!(
buf = format!("{:X?}", self.buf),
"dumping buf after line skip"
);
self.alt_buf ^= 1; // read into the other buf, so we can check for sameness
self.display();
Ok(())
}
pub fn dump(&mut self, data: &mut dyn DataSource) -> Result<()> {
// skip a given number of bytes
if self.skip > 0 {
data.skip(self.skip)?;
self.rd_counter += self.skip;
debug!(
data_idx = self.data_idx,
"Skipped {}",
humanbytes(self.skip)
);
}
// print the head
self.display_buf += &format!("DATA IDX {LINE_SEP_VERT} DATA AS HEX");
if self.chars {
self.display_buf += &format!("{:width$} {LINE_SEP_VERT} DATA AS CHAR", "", width = 37);
}
self.display();
self.sep();
// data dump loop
self.rd_data(data)?;
self.data_idx = 0;
while self.len > 0 || self.first_iter {
self.first_iter = false;
self.dump_a_line();
// loop breaker logic
if self.stop || self.len < BYTES_PER_LINE {
break;
}
self.rd_data(data)?;
// after line logic
if self.buf[0] == self.buf[1] && self.len == BYTES_PER_LINE && !self.show_identical {
self.skip_lines(data)?;
}
}
self.data_idx += BYTES_PER_LINE;
self.sep();
self.display_buf += &format!(
"{:08X} {LINE_SEP_VERT} read total:\t\t {:<8} {:<15}",
self.rd_counter,
humanbytes(self.rd_counter),
format!("({} B)", self.rd_counter)
);
if self.chars {
self.display_buf += &format!("{LINE_SEP_VERT}");
}
self.display();
Ok(())
}
#[inline]
fn adjust_counters(&mut self) {
self.rd_counter += self.len;
self.data_idx += self.len;
}
fn rd_data(&mut self, data: &mut dyn DataSource) -> Result<()> {
match data.read(&mut self.buf[self.alt_buf]) {
Ok(mut len) => {
if self.limit != 0 && self.rd_counter + (BYTES_PER_LINE - 1) >= self.limit {
len = self.limit % BYTES_PER_LINE;
self.stop = true;
}
self.len = len;
self.adjust_counters();
return Ok(());
}
Err(err) => {
error!("error while reading data: {err}");
bail!(err)
}
}
}
}
pub trait DataSource: Read {
fn skip(&mut self, length: usize) -> std::io::Result<()>;
}
impl DataSource for std::io::Stdin {
fn skip(&mut self, _length: usize) -> std::io::Result<()> {
warn!("can't skip bytes for the stdin!");
Ok(())
}
}
impl DataSource for std::fs::File {
fn skip(&mut self, length: usize) -> std::io::Result<()> {
self.seek(SeekFrom::Current(length as i64))?;
// returns the new position from the start, we don't need it here.
Ok(())
}
}
fn mask_chars(c: char) -> char {
if c.is_ascii_graphic() {
return c;
} else if c == '\n' {
return '↩';
} else if c == ' ' {
return '␣';
} else if c == '\t' {
return '⭾';
} else {
return '<27>';
}
}

1
members/libpt-bintols/src/lib.rs
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@ -25,4 +25,3 @@ pub const YOBI: u128 = 2u128.pow(80);
// use libpt_core; // use libpt_core;
pub mod datalayout; pub mod datalayout;
pub mod display; pub mod display;
pub mod hedu;