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author | Martin Ashby <martin@ashbysoft.com> | 2023-09-26 06:51:06 +0100 |
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committer | Martin Ashby <martin@ashbysoft.com> | 2023-09-26 06:51:06 +0100 |
commit | 183d60a6e87230cc767c56900b94c9c694596de1 (patch) | |
tree | c08b473a293dc465989a09c5d681191898cf2c2f /src/copy_in_response.zig | |
parent | 02f9e99bfccad8837d327880f756ec7bab711783 (diff) | |
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Move protocol definitions into a subfolder
Diffstat (limited to 'src/copy_in_response.zig')
-rw-r--r-- | src/copy_in_response.zig | 83 |
1 files changed, 0 insertions, 83 deletions
diff --git a/src/copy_in_response.zig b/src/copy_in_response.zig deleted file mode 100644 index f6ed84b..0000000 --- a/src/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]); -} |