From 10cbd00671f7144122f1d79a3ac1f67cbb9a51c6 Mon Sep 17 00:00:00 2001
From: Martin Ashby <martin@ashbysoft.com>
Date: Tue, 26 Sep 2023 07:19:42 +0100
Subject: Generify copy response and add CopyOutResponse and CopyBothResponse

---
 src/proto/copy_in_response.zig | 83 ------------------------------------------
 1 file changed, 83 deletions(-)
 delete mode 100644 src/proto/copy_in_response.zig

(limited to 'src/proto/copy_in_response.zig')

diff --git a/src/proto/copy_in_response.zig b/src/proto/copy_in_response.zig
deleted file mode 100644
index 65d9ad7..0000000
--- a/src/proto/copy_in_response.zig
+++ /dev/null
@@ -1,83 +0,0 @@
-const std = @import("std");
-const log = std.log.scoped(.pgz);
-const ByteArrayList = std.ArrayList(u8);
-const ProtocolError = @import("../main.zig").ProtocolError;
-const ClientError = @import("../main.zig").ClientError;
-const enum_from_int = @import("../main.zig").enum_from_int;
-const FormatCode = @import("../main.zig").FormatCode;
-
-pub const Tag: u8 = 'G';
-// TODO generics  it's the same as CopyOutResponse and CopyBothResponse.
-const CopyInResponse = @This();
-
-overall_format_code: u8,
-format_codes: []const FormatCode, // owned
-
-pub fn read(a: std.mem.Allocator, b: []const u8) !CopyInResponse {
-    var fbs = std.io.fixedBufferStream(b);
-    var reader = fbs.reader();
-    const overall_format_code = try reader.readIntBig(u8);
-    const n_columns = try reader.readIntBig(u16);
-    var format_codes = try a.alloc(FormatCode, n_columns);
-    errdefer a.free(format_codes);
-    for (0..n_columns) |i| {
-        const int_format_code = try reader.readIntBig(u16);
-        format_codes[i] = enum_from_int(FormatCode, int_format_code) orelse return ProtocolError.InvalidFormatCode;
-    }
-    return .{
-        .overall_format_code = overall_format_code,
-        .format_codes = format_codes,
-    };
-}
-
-pub fn write(self: CopyInResponse, a: std.mem.Allocator, stream_writer: anytype) !void {
-    try stream_writer.writeIntBig(u8, Tag);
-    var al = ByteArrayList.init(a);
-    defer al.deinit();
-    var cw = std.io.countingWriter(al.writer());
-    var writer = cw.writer();
-    try writer.writeIntBig(u32, 0); // length placeholder
-    try writer.writeIntBig(u8, self.overall_format_code);
-    try writer.writeIntBig(u16, @intCast(self.format_codes.len));
-    for (self.format_codes) |format_code| {
-        try writer.writeIntBig(u16, @intFromEnum(format_code));
-    }
-    std.mem.writeIntBig(u32, al.items[0..4], @as(u32, @intCast(cw.bytes_written))); // Update length
-    try stream_writer.writeAll(al.items);
-}
-
-pub fn deinit(self: *CopyInResponse, a: std.mem.Allocator) void {
-    a.free(self.format_codes);
-}
-
-test "round trip" {
-    const allocator = std.testing.allocator;
-    var format_codes = try allocator.alloc(FormatCode, 3);
-    format_codes[0] = .Binary;
-    format_codes[1] = .Binary;
-    format_codes[2] = .Text;
-    var sm = CopyInResponse{
-        .overall_format_code = 1,
-        .format_codes = format_codes,
-    };
-    defer sm.deinit(allocator);
-
-    var bal = ByteArrayList.init(allocator);
-    defer bal.deinit();
-    try sm.write(allocator, bal.writer());
-
-    var fbs = std.io.fixedBufferStream(bal.items);
-    var reader = fbs.reader();
-    const tag = try reader.readByte();
-    try std.testing.expectEqual(Tag, tag);
-    const len = try reader.readIntBig(u32);
-    const buf = try allocator.alloc(u8, len - 4);
-    defer allocator.free(buf);
-    try reader.readNoEof(buf);
-    var sm2 = try CopyInResponse.read(allocator, buf);
-    defer sm2.deinit(allocator);
-
-    try std.testing.expectEqual(FormatCode.Binary, sm2.format_codes[0]);
-    try std.testing.expectEqual(FormatCode.Binary, sm2.format_codes[1]);
-    try std.testing.expectEqual(FormatCode.Text, sm2.format_codes[2]);
-}
-- 
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