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-rw-r--r--lib/std/compress/zstandard/readers.zig82
1 files changed, 0 insertions, 82 deletions
diff --git a/lib/std/compress/zstandard/readers.zig b/lib/std/compress/zstandard/readers.zig
deleted file mode 100644
index 7b15784187..0000000000
--- a/lib/std/compress/zstandard/readers.zig
+++ /dev/null
@@ -1,82 +0,0 @@
-const std = @import("std");
-
-pub const ReversedByteReader = struct {
- remaining_bytes: usize,
- bytes: []const u8,
-
- const Reader = std.io.GenericReader(*ReversedByteReader, error{}, readFn);
-
- pub fn init(bytes: []const u8) ReversedByteReader {
- return .{
- .bytes = bytes,
- .remaining_bytes = bytes.len,
- };
- }
-
- pub fn reader(self: *ReversedByteReader) Reader {
- return .{ .context = self };
- }
-
- fn readFn(ctx: *ReversedByteReader, buffer: []u8) !usize {
- if (ctx.remaining_bytes == 0) return 0;
- const byte_index = ctx.remaining_bytes - 1;
- buffer[0] = ctx.bytes[byte_index];
- // buffer[0] = @bitReverse(ctx.bytes[byte_index]);
- ctx.remaining_bytes = byte_index;
- return 1;
- }
-};
-
-/// A bit reader for reading the reversed bit streams used to encode
-/// FSE compressed data.
-pub const ReverseBitReader = struct {
- byte_reader: ReversedByteReader,
- bit_reader: std.io.BitReader(.big, ReversedByteReader.Reader),
-
- pub fn init(self: *ReverseBitReader, bytes: []const u8) error{BitStreamHasNoStartBit}!void {
- self.byte_reader = ReversedByteReader.init(bytes);
- self.bit_reader = std.io.bitReader(.big, self.byte_reader.reader());
- if (bytes.len == 0) return;
- var i: usize = 0;
- while (i < 8 and 0 == self.readBitsNoEof(u1, 1) catch unreachable) : (i += 1) {}
- if (i == 8) return error.BitStreamHasNoStartBit;
- }
-
- pub fn readBitsNoEof(self: *@This(), comptime U: type, num_bits: u16) error{EndOfStream}!U {
- return self.bit_reader.readBitsNoEof(U, num_bits);
- }
-
- pub fn readBits(self: *@This(), comptime U: type, num_bits: u16, out_bits: *u16) error{}!U {
- return try self.bit_reader.readBits(U, num_bits, out_bits);
- }
-
- pub fn alignToByte(self: *@This()) void {
- self.bit_reader.alignToByte();
- }
-
- pub fn isEmpty(self: ReverseBitReader) bool {
- return self.byte_reader.remaining_bytes == 0 and self.bit_reader.count == 0;
- }
-};
-
-pub fn BitReader(comptime Reader: type) type {
- return struct {
- underlying: std.io.BitReader(.little, Reader),
-
- pub fn readBitsNoEof(self: *@This(), comptime U: type, num_bits: u16) !U {
- return self.underlying.readBitsNoEof(U, num_bits);
- }
-
- pub fn readBits(self: *@This(), comptime U: type, num_bits: u16, out_bits: *u16) !U {
- return self.underlying.readBits(U, num_bits, out_bits);
- }
-
- pub fn alignToByte(self: *@This()) void {
- self.underlying.alignToByte();
- }
- };
-}
-
-pub fn bitReader(reader: anytype) BitReader(@TypeOf(reader)) {
- return .{ .underlying = std.io.bitReader(.little, reader) };
-}