Commit 262bfc5826

Andrew Kelley <andrew@ziglang.org>
2025-08-01 09:24:35
std.Io: delete LimitedReader
1 parent e061445
Changed files (2)
lib/std/Io/limited_reader.zig
@@ -1,45 +0,0 @@
-const std = @import("../std.zig");
-const io = std.io;
-const assert = std.debug.assert;
-const testing = std.testing;
-
-pub fn LimitedReader(comptime ReaderType: type) type {
-    return struct {
-        inner_reader: ReaderType,
-        bytes_left: u64,
-
-        pub const Error = ReaderType.Error;
-        pub const Reader = io.GenericReader(*Self, Error, read);
-
-        const Self = @This();
-
-        pub fn read(self: *Self, dest: []u8) Error!usize {
-            const max_read = @min(self.bytes_left, dest.len);
-            const n = try self.inner_reader.read(dest[0..max_read]);
-            self.bytes_left -= n;
-            return n;
-        }
-
-        pub fn reader(self: *Self) Reader {
-            return .{ .context = self };
-        }
-    };
-}
-
-/// Returns an initialised `LimitedReader`.
-/// `bytes_left` is a `u64` to be able to take 64 bit file offsets
-pub fn limitedReader(inner_reader: anytype, bytes_left: u64) LimitedReader(@TypeOf(inner_reader)) {
-    return .{ .inner_reader = inner_reader, .bytes_left = bytes_left };
-}
-
-test "basic usage" {
-    const data = "hello world";
-    var fbs = std.io.fixedBufferStream(data);
-    var early_stream = limitedReader(fbs.reader(), 3);
-
-    var buf: [5]u8 = undefined;
-    try testing.expectEqual(@as(usize, 3), try early_stream.reader().read(&buf));
-    try testing.expectEqualSlices(u8, data[0..3], buf[0..3]);
-    try testing.expectEqual(@as(usize, 0), try early_stream.reader().read(&buf));
-    try testing.expectError(error.EndOfStream, early_stream.reader().skipBytes(10, .{}));
-}
lib/std/Io.zig
@@ -431,10 +431,6 @@ pub const bufferedWriter = @import("Io/buffered_writer.zig").bufferedWriter;
 pub const FixedBufferStream = @import("Io/fixed_buffer_stream.zig").FixedBufferStream;
 /// Deprecated in favor of `Reader`.
 pub const fixedBufferStream = @import("Io/fixed_buffer_stream.zig").fixedBufferStream;
-/// Deprecated in favor of `Reader.Limited`.
-pub const LimitedReader = @import("Io/limited_reader.zig").LimitedReader;
-/// Deprecated in favor of `Reader.Limited`.
-pub const limitedReader = @import("Io/limited_reader.zig").limitedReader;
 /// Deprecated with no replacement; inefficient pattern
 pub const CountingWriter = @import("Io/counting_writer.zig").CountingWriter;
 /// Deprecated with no replacement; inefficient pattern