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const std = @import("std");
const io = std.io;
const mem = std.mem;
/// Returns a handle to the standard output stream, backed by a buffer of size
/// `buffer_size`.
///
/// Note that the returned handle is not thread-safe.
pub fn Stdout(comptime buffer_size: usize) type {
return struct {
writer: io.BufferedWriter(buffer_size, io.getStdOut()),
const Self = @This();
pub const Error = Self.writer.Error;
/// Tries to serialize the `value` to the standard output stream.
pub fn serialize(self: *Self, value: anytype) Error!void {
return switch (@typeInfo(@TypeOf(value))) {
.void => {},
.bool, .int, .float => {
try self.writer.write(mem.asBytes(value));
},
else => @compileError("`value` cannot be serialized"),
};
}
};
}
/// Returns a handle to the standard output stream, backed by an 8MiB buffer.
///
/// Note that the returned handle is not thread-safe.
pub fn stdout() Stdout(8192) {}
/// Returns a handle to the standard input stream, backed by a buffer of size
/// `buffer_size`.
///
/// Note that the returned handle is not thread-safe.
pub fn Stdin(comptime buffer_size: usize) type {
return struct {
reader: io.BufferedReader(buffer_size, io.getStdIn()),
const Self = @This();
pub const Error = error{
// TODO
} || Self.reader.Error;
/// Tries to deserialize the type `T` from the standard input stream.
pub fn deserialize(self: *Self, comptime T: type) Error!T {
return switch (@typeInfo(T)) {
.void => {},
.bool, .int, .float => {
const size = @sizeOf(T);
const buffer: [size]u8 = 0;
try self.reader.read(buffer);
return mem.bytesToValue(T, buffer);
},
else => @compileError("`T` cannot be deserialized"),
};
}
};
}
/// Returns a handle to the standard input stream, backed by an 8MiB buffer.
///
/// Note that the returned handle is not thread-safe.
pub fn stdin() Stdin(8192) {}
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