Add a new misc program.

zig-impl/misc/snd-rcv.zig

@@ -0,0 +1,54 @@
+const std = @import("std");
+const testing = std.testing;
+const net = std.net;
+const fmt = std.fmt;
+const mem = std.mem;
+const print = std.debug.print;
+
+fn disconnect(stream: net.Stream) void { stream.close(); }
+
+fn connect(path: []const u8) !net.Stream {
+    return try net.connectUnixSocket(path);
+}
+
+fn receive_msg(stream: net.Stream) !void {
+    var buffer: [1000]u8 = undefined;
+    var fbs = std.io.fixedBufferStream(&buffer);
+    var reader = fbs.reader();
+
+    _ = try stream.read(buffer[0..]);
+
+    const msg_type    = try reader.readByte();
+    const msg_len     = try reader.readIntBig(u32);
+    const msg_payload = buffer[5..5+msg_len];
+    print ("type: {}, len {}, content: {s}\n"
+           , .{msg_type, msg_len, msg_payload});
+}
+
+fn send_msg(stream: net.Stream) !usize {
+    var buffer: [1000]u8 = undefined;
+    var fbs = std.io.fixedBufferStream(&buffer);
+    var writer = fbs.writer();
+
+    try writer.writeByte(2); // DATA
+
+    const message = "hello everyone";
+    try writer.writeIntBig(u32, message.len);
+    _ = try writer.write(message);
+
+    return stream.write (fbs.getWritten());
+}
+
+pub fn main() !u8 {
+    var path = "/tmp/.TEST_USOCK";
+    print("Connection to {s}...\n", .{path});
+    var stream = try connect(path);
+    print("Connected! Sending a message...\n", .{});
+    const bytecount = try send_msg(stream);
+    print("Sent {} bytes! Waiting a message...\n", .{bytecount});
+    try receive_msg(stream);
+    print("Received a message! Disconnection...\n", .{});
+    disconnect(stream);
+    print("Disconnected!\n", .{});
+    return 0;
+}