Initial C api

src/c_api.zig

@@ -0,0 +1,56 @@
+// client
+
+export fn zaprus_init() c_int {
+    SaprusClient.init() catch return 1;
+    return 0;
+}
+
+export fn zaprus_deinit() c_int {
+    SaprusClient.deinit();
+    return 0;
+}
+
+export fn zaprus_send_relay(payload: [*]const u8, len: usize, dest: [4]u8) c_int {
+    SaprusClient.sendRelay(payload[0..len], dest, allocator) catch return 1;
+    return 0;
+}
+
+export fn zaprus_send_initial_connection(payload: [*]const u8, len: usize, initial_port: u16) c_int {
+    SaprusClient.sendInitialConnection(payload[0..len], initial_port, allocator) catch return 1;
+    return 0;
+}
+
+export fn zaprus_connect(payload: [*]const u8, len: usize) ?*SaprusMessage {
+    return SaprusClient.connect(payload[0..len], allocator) catch null;
+}
+
+// message
+
+/// ptr should be freed by the caller.
+export fn zaprus_message_to_bytes(msg: SaprusMessage, ptr: *[*]u8, len: *usize) c_int {
+    const bytes = msg.toBytes(allocator) catch return 1;
+    ptr.* = bytes[0..].*;
+    len.* = bytes.len;
+    return 0;
+}
+
+/// Return value should be destroyed with zaprus_message_deinit.
+export fn zaprus_message_from_bytes(bytes: [*]const u8, len: usize) ?*SaprusMessage {
+    return SaprusMessage.fromBytes(bytes[0..len], allocator) catch null;
+}
+
+export fn zaprus_message_deinit(msg: *SaprusMessage) void {
+    msg.deinit(allocator);
+}
+
+const std = @import("std");
+
+const zaprus = @import("./root.zig");
+const SaprusClient = zaprus.Client;
+const SaprusMessage = zaprus.Message;
+
+const allocator = std.heap.c_allocator;
+
+test {
+    std.testing.refAllDeclsRecursively(@This());
+}