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tty: make init functions accept buffer parameter
Change PosixTty and WindowsTty init functions to accept a buffer slice
instead of creating a fixed-size buffer internally. This allows callers
to control buffer size and allocation strategy.
The buffer field in both structs is changed from [4096]u8 to []u8,
and the init functions now take a buffer: []u8 parameter that gets
assigned to the struct field.
Amp-Thread-ID: https://ampcode.com/threads/T-1502f393-0cb2-4350-975b-5c6305f60969
Co-authored-by: Amp <amp@ampcode.com>
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-8
src/tty.zig
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src/tty.zig
···
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fd: posix.fd_t,
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/// Write buffer
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-
buffer: [4096]u8,
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+
buffer: []u8,
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/// Embedded writer
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writer: std.io.Writer,
···
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/// initializes a Tty instance by opening /dev/tty and "making it raw". A
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/// signal handler is installed for SIGWINCH. No callbacks are installed, be
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/// sure to register a callback when initializing the event loop
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pub fn init() !PosixTty {
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pub fn init(buffer: []u8) !PosixTty {
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// Open our tty
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const fd = try posix.open("/dev/tty", .{ .ACCMODE = .RDWR }, 0);
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···
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var self: PosixTty = .{
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.fd = fd,
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.termios = termios,
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-
.buffer = undefined,
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.buffer = buffer,
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.writer = undefined, // Will be set after self is created
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};
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// Initialize the writer to use our embedded buffer
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self.writer = .{
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.vtable = &vtable,
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.buffer = &self.buffer,
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.buffer = self.buffer,
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.end = 0,
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};
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···
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buf: [4]u8 = undefined,
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/// Write buffer
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buffer: [4096]u8,
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buffer: []u8,
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/// Embedded writer
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writer: std.io.Writer,
···
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.ENABLE_LVB_GRID_WORLDWIDE = 1, // enables reverse video and underline
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};
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pub fn init() !Tty {
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pub fn init(buffer: []u8) !Tty {
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const stdin = std.io.getStdIn().handle;
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const stdout = std.io.getStdOut().handle;
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···
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.initial_codepage = initial_output_codepage,
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.initial_input_mode = initial_input_mode,
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.initial_output_mode = initial_output_mode,
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.buffer = undefined,
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.buffer = buffer,
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.writer = undefined, // Will be set after self is created
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};
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// Initialize the writer to use our embedded buffer
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self.writer = .{
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.vtable = &vtable,
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.buffer = &self.buffer,
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.buffer = self.buffer,
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.end = 0,
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};
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