Switch: WIP.
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@ -2,52 +2,162 @@ const std = @import("std");
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const testing = std.testing;
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const fmt = std.fmt;
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pub const Switches = std.ArrayList(Switch);
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const net = std.net;
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const ipc = @import("./main.zig");
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const Message = ipc.Message;
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const CBEventType = ipc.CBEvent.Type;
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const Allocator = std.mem.Allocator;
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const print_eq = @import("./util.zig").print_eq;
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const print = std.debug.print;
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// TODO: default callbacks, actual switching.
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pub const Switch = struct {
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origin : usize,
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destination : usize,
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// orig_in: ?fn (origin: usize, m: Message) CBEvent,
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// orig_out: ?fn (origin: usize, m: Message) CBEvent,
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// dest_in: ?fn (origin: usize, m: Message) CBEvent,
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// dest_out: ?fn (origin: usize, m: Message) CBEvent,
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const Event = ipc.Event;
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pub const Switches = struct {
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const Self = @This();
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pub fn init(origin: usize, destination: usize) Self {
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// db: std.HashList(i32, ManagedConnection),
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pub fn init (_: Allocator) !Self {
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return Self {
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.origin = origin,
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.destination = destination,
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// .db = try std.HashList(i32, ManagedConnection).init(allocator),
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};
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}
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pub fn format(self: Self, comptime _: []const u8, _: fmt.FormatOptions, out_stream: anytype) !void {
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try fmt.format(out_stream
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, "switch {} <-> {}"
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, .{ self.origin, self.destination} );
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pub fn deinit (_: *Self) void {
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}
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// pub fn read(fd: i32)
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};
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test "Switch - creation and display" {
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const config = .{.safety = true};
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var gpa = std.heap.GeneralPurposeAllocator(config){};
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defer _ = gpa.deinit();
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const allocator = gpa.allocator();
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pub const ManagedConnection = struct {
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dest : i32,
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in : *const fn (origin: i32, m: *Message) CBEventType = default_in,
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out : *const fn (origin: i32, m: *Message) CBEventType = default_out,
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var switchdb = Switches.init(allocator);
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defer switchdb.deinit();
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// pub fn read
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// pub fn write
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var first = Switch.init(3,8); // origin destination
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var second = Switch.init(2,4); // origin destination
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try switchdb.append(first);
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try switchdb.append(second);
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// pub fn set_callbacks(self: *Self,
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// in : *const fn (origin: i32, m: *Message) CBEventType,
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// out : *const fn (origin: i32, m: *Message) CBEventType) void {
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//
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// self.in = in;
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// self.out = out;
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// }
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};
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try print_eq("switch 3 <-> 8", first);
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try print_eq("switch 2 <-> 4", second);
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// For IO callbacks (switching).
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// pub const Type = enum {
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// NO_ERROR, // No error. A message was generated.
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// FD_CLOSING, // The fd is closing.
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// FD_ERROR, // Generic error.
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// PARSING_ERROR, // The message was read but with errors.
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// IGNORE, // The message should be ignored (protocol specific).
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// };
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try testing.expect(2 == switchdb.items.len);
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fn default_in (origin: i32, m: *Message) CBEventType {
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print ("receiving a message originated by {}\n", .{origin});
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var buffer: [2000000]u8 = undefined; // TODO: FIXME??
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var packet_size: usize = undefined;
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// This may be kinda hacky, idk.
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var stream: net.Stream = .{ .handle = origin };
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packet_size = try stream.read(buffer[0..]);
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// Let's handle this as a disconnection.
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if (packet_size <= 4) {
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return CBEventType.FD_CLOSING;
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}
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m.* = Message.read(origin, buffer[0..], std.heap.c_allocator)
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catch return CBEventType.FD_ERROR;
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//** There is a message, send it to the corresponding fd **/
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return CBEventType.NO_ERROR;
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}
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fn default_out (origin: i32, m: *Message) CBEventType {
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print ("sending a message originated by {}\n", .{origin});
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// Message contains the fd, no need to search for
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// the right structure to copy, let's just recreate
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// a Stream from the fd.
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var stream = net.Stream { .handle = m.fd };
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var buffer: [200000]u8 = undefined; // TODO: buffer size
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var fbs = std.io.fixedBufferStream(&buffer);
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var writer = fbs.writer();
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// returning basic errors, no details.
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_ = m.write(writer) catch return CBEventType.FD_ERROR;
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_ = stream.write (fbs.getWritten()) catch return CBEventType.FD_ERROR;
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return CBEventType.NO_ERROR;
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}
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// // TODO: actual switching.
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// pub const Switch = struct {
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// origin : i32,
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// destination : i32,
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//
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// orig_in : *const fn (origin: i32, m: *Message) CBEventType,
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// orig_out : *const fn (origin: i32, m: *Message) CBEventType,
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// dest_in : *const fn (origin: i32, m: *Message) CBEventType,
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// dest_out : *const fn (origin: i32, m: *Message) CBEventType,
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//
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// const Self = @This();
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//
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// pub fn init(origin: i32, destination: i32) Self {
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// return Self {
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// .origin = origin
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// , .destination = destination
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// , .orig_in = default_in
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// , .orig_out = default_out
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// , .dest_in = default_in
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// , .dest_out = default_out
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// };
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// }
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//
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// pub fn set_callbacks(self: *Self, fd: i32,
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// in : *const fn (origin: i32, m: *Message) CBEventType,
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// out : *const fn (origin: i32, m: *Message) CBEventType) void {
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//
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// if (fd == self.origin) {
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// self.orig_in = in;
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// self.orig_out = out;
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// }
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// else {
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// self.dest_in = in;
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// self.dest_out = out;
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// }
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// }
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//
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// pub fn format(self: Self, comptime _: []const u8, _: fmt.FormatOptions, out_stream: anytype) !void {
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// try fmt.format(out_stream
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// , "switch {} <-> {}"
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// , .{ self.origin, self.destination} );
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// }
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// };
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// test "Switch - creation and display" {
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// const config = .{.safety = true};
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// var gpa = std.heap.GeneralPurposeAllocator(config){};
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// defer _ = gpa.deinit();
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// const allocator = gpa.allocator();
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//
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// var switchdb = Switches.init(allocator);
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// defer switchdb.deinit();
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//
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// var first = Switch.init(3,8); // origin destination
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// var second = Switch.init(2,4); // origin destination
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// try switchdb.append(first);
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// try switchdb.append(second);
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//
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// try print_eq("switch 3 <-> 8", first);
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// try print_eq("switch 2 <-> 4", second);
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//
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// try testing.expect(2 == switchdb.items.len);
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// }
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