Initial: port of pgx to zig (so, pgz)

Starting with message structures, so far we have
startup_message and authentication_ok

1 files changed, 39 insertions, 0 deletions

diff --git a/src/main.zig b/src/main.zig
new file mode 100644
index 0000000..4bed468
--- /dev/null
+++ b/src/main.zig
@@ -0,0 +1,39 @@
+const std = @import("std");
+const testing = std.testing;
+const StartupMessage = @import("startup_message.zig");
+const AuthenticationOk = @import("authentication_ok.zig");
+
+pub const ProtocolError = error{
+    InvalidProtocolVersion,
+    InvalidKeyValuePair,
+    InvalidMessageLength,
+    InvalidAuthType,
+};
+
+pub const ClientError = error{
+    UnsupportedAuthType,
+};
+
+pub const AuthType = enum(u32) {
+    AuthTypeOk = 0,
+};
+
+// Fallible version of enumFromInt
+pub fn enum_from_int(comptime e: type, i: anytype) ?e {
+    const enum_ti = @typeInfo(e);
+    if (enum_ti != .Enum) @compileError("e should be an enum but instead it's a " ++ @typeName(e));
+    const ei = enum_ti.Enum;
+    if (@TypeOf(i) != ei.tag_type) @compileError("i should be of type " ++ @typeName(e) ++ " but instead it's " ++ @typeName(@TypeOf(i)));
+    inline for (ei.fields) |field| {
+        if (field.value == i) {
+            return @enumFromInt(i);
+        }
+    } else {
+        return null;
+    }
+}
+
+test {
+    _ = StartupMessage;
+    _ = AuthenticationOk;
+}