sashakoshka/bulb
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Escape LF in board file, refuse to store or print control chars

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This commit is contained in:
Sasha Koshka 2024-10-11 16:54:56 -04:00
parent 31d7c63114
commit d921a2b144
1 changed files with 39 additions and 10 deletions
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47
internal/bulb/bulb.ha
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@ -1,3 +1,4 @@
use ascii;
use bufio;
use fs;
use fmt;
@ -40,8 +41,37 @@ export fn read(output: io::handle, board: str, number: int) (void | error) = {
// we add 1 to account for the blank line that will always be at the
// bottom
seek_to_nth_last_line(file, number + 1)?;
// TODO don't copy control characters!
io::copy(output, file)?;
static let output_wbuf: [os::BUFSZ]u8 = [0...];
let output = bufio::init(output, [], output_wbuf);
let file = bufio::newscanner(file);
defer bufio::finish(&file);
let saw_escape = false;
for (true) {
let byte = match (bufio::scan_byte(&file)?) {
case let byte: u8 => yield byte;
case io::EOF => break;
};
if (byte == '\x1b') {
saw_escape = true;
} else {
if (byte == '\n') {
if (saw_escape) {
fmt::fprint(&output, "\n ")?;
} else {
fmt::fprint(&output, "\n")?;
};
} else if (!ascii::iscntrl(byte: rune)) {
let fake_buffer: [1]u8 = [byte];
io::write(&output, fake_buffer)?;
};
saw_escape = false;
};
};
bufio::flush(&output)?;
};
export fn post(input: io::handle, board: str, user_name: (str | void)) (void | error) = {
@ -57,26 +87,25 @@ export fn post(input: io::handle, board: str, user_name: (str | void)) (void | e
static let file_wbuf: [os::BUFSZ]u8 = [0...];
let file = bufio::init(file, [], file_wbuf);
let scanner = bufio::newscanner(input);
defer bufio::finish(&scanner);
let input = bufio::newscanner(input);
defer bufio::finish(&input);
let saw_break = false;
fmt::fprintf(&file, "{}: ", user)?;
for (true) {
let byte = match (bufio::scan_byte(&scanner)?) {
let byte = match (bufio::scan_byte(&input)?) {
case let byte: u8 => yield byte;
case io::EOF => break;
};
if (saw_break) {
fmt::fprint(&file, "\n ")?;
fmt::fprint(&file, "\x1b\n")?;
saw_break = false;
};
switch (byte) {
case '\n' =>
if (byte == '\n') {
saw_break = true;
case =>
} else if (!ascii::iscntrl(byte: rune)) {
let fake_buffer: [1]u8 = [byte];
io::write(&file, fake_buffer)?;
};