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Refactor to remove redundant indent

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Jianfeng Jiang 2023-07-26 17:51:34 +08:00 committed by Tate, Hongliang Tian
parent af58912631
commit d1c0090d3a
1 changed files with 73 additions and 59 deletions
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132
services/libs/jinux-std/src/device/tty/line_discipline.rs
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@ -65,7 +65,7 @@ impl CurrentLine {
}
impl LineDiscipline {
/// create a new line discipline
/// Create a new line discipline
pub fn new() -> Self {
Self {
current_line: SpinLock::new(CurrentLine::new()),
@ -76,71 +76,89 @@ impl LineDiscipline {
}
}
/// push char to line discipline. This function should be called in input interrupt handler.
/// Push char to line discipline.
pub fn push_char(&self, mut item: u8, echo_callback: fn(&str)) {
let termios = self.termios.lock_irq_disabled();
if termios.contains_icrnl() {
if item == b'\r' {
item = b'\n'
if termios.contains_icrnl() && item == b'\r' {
item = b'\n'
}
// Raw mode
if !termios.is_canonical_mode() {
self.read_buffer.lock_irq_disabled().push_overwrite(item);
self.update_readable_state();
return;
}
// Canonical mode
self.may_send_signal_to_foreground(&termios, item);
if item == *termios.get_special_char(CC_C_CHAR::VKILL) {
// Erase current line
self.current_line.lock_irq_disabled().drain();
}
if item == *termios.get_special_char(CC_C_CHAR::VERASE) {
// Type backspace
let mut current_line = self.current_line.lock_irq_disabled();
if !current_line.is_empty() {
current_line.backspace();
}
}
if termios.is_canonical_mode() {
if item == *termios.get_special_char(CC_C_CHAR::VINTR) {
// type Ctrl + C, signal SIGINT
if termios.contains_isig() {
if let Some(foreground) = self.foreground.lock_irq_disabled().upgrade() {
let kernel_signal = KernelSignal::new(SIGINT);
foreground.kernel_signal(kernel_signal);
}
}
} else if item == *termios.get_special_char(CC_C_CHAR::VQUIT) {
// type Ctrl + \, signal SIGQUIT
if termios.contains_isig() {
if let Some(foreground) = self.foreground.lock_irq_disabled().upgrade() {
let kernel_signal = KernelSignal::new(SIGQUIT);
foreground.kernel_signal(kernel_signal);
}
}
} else if item == *termios.get_special_char(CC_C_CHAR::VKILL) {
// erase current line
self.current_line.lock_irq_disabled().drain();
} else if item == *termios.get_special_char(CC_C_CHAR::VERASE) {
// type backspace
let mut current_line = self.current_line.lock_irq_disabled();
if !current_line.is_empty() {
current_line.backspace();
}
} else if meet_new_line(item, &termios) {
// a new line was met. We currently add the item to buffer.
// when we read content, the item should be skipped if it's EOF.
let mut current_line = self.current_line.lock_irq_disabled();
current_line.push_char(item);
let current_line_chars = current_line.drain();
for char in current_line_chars {
self.read_buffer.lock_irq_disabled().push_overwrite(char);
}
} else if item >= 0x20 && item < 0x7f {
// printable character
self.current_line.lock_irq_disabled().push_char(item);
if meet_new_line(item, &termios) {
// If a new line is met, all bytes in current_line will be moved to read_buffer
let mut current_line = self.current_line.lock_irq_disabled();
current_line.push_char(item);
let current_line_chars = current_line.drain();
for char in current_line_chars {
self.read_buffer.lock_irq_disabled().push_overwrite(char);
}
} else {
// raw mode
self.read_buffer.lock_irq_disabled().push_overwrite(item);
// debug!("push char: {}", char::from(item))
}
if item >= 0x20 && item < 0x7f {
// Printable character
self.current_line.lock_irq_disabled().push_char(item);
}
if termios.contain_echo() {
self.output_char(item, &termios, echo_callback);
}
if self.is_readable() {
self.pollee.add_events(IoEvents::IN);
}
self.update_readable_state();
}
/// whether self is readable
fn is_readable(&self) -> bool {
!self.read_buffer.lock_irq_disabled().is_empty()
fn may_send_signal_to_foreground(&self, termios: &KernelTermios, item: u8) {
if !termios.is_canonical_mode() || !termios.contains_isig() {
return;
}
let Some(foreground) = self.foreground.lock().upgrade() else {
return;
};
let signal = match item {
item if item == *termios.get_special_char(CC_C_CHAR::VINTR) => {
KernelSignal::new(SIGINT)
}
item if item == *termios.get_special_char(CC_C_CHAR::VQUIT) => {
KernelSignal::new(SIGQUIT)
}
_ => return,
};
// FIXME: kernel_signal may sleep
foreground.kernel_signal(signal);
}
fn update_readable_state(&self) {
let buffer = self.read_buffer.lock_irq_disabled();
// FIXME: add/del events may sleep
if !buffer.is_empty() {
self.pollee.add_events(IoEvents::IN);
} else {
self.pollee.del_events(IoEvents::IN);
}
}
// TODO: respect output flags
@ -224,9 +242,7 @@ impl LineDiscipline {
unreachable!()
}
};
if !self.is_readable() {
self.pollee.del_events(IoEvents::IN);
}
self.update_readable_state();
Ok(read_len)
}
@ -306,9 +322,7 @@ impl LineDiscipline {
pub fn set_fg(&self, foreground: Weak<ProcessGroup>) {
*self.foreground.lock_irq_disabled() = foreground;
// Some background processes may be waiting on the wait queue, when set_fg, the background processes may be able to read.
if self.is_readable() {
self.pollee.add_events(IoEvents::IN);
}
self.update_readable_state();
}
/// get foreground process group id