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std.compress.zstd: ensure window size fits into usize

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This commit is contained in:
dweiller 2025-03-31 16:24:37 +11:00
parent 7a7d6a02a5
commit d034f2a87b
1 changed files with 2 additions and 2 deletions
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4
lib/std/compress/zstandard/decompress.zig
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@ -380,7 +380,7 @@ pub const FrameContext = struct {
/// - `error.WindowSizeUnknown` if the frame does not have a valid window
/// size
/// - `error.WindowTooLarge` if the window size is larger than
/// `window_size_max`
/// `window_size_max` or `std.math.intMax(usize)`
/// - `error.ContentSizeTooLarge` if the frame header indicates a content
/// size larger than `std.math.maxInt(usize)`
pub fn init(
@ -395,7 +395,7 @@ pub const FrameContext = struct {
const window_size = if (window_size_raw > window_size_max)
return error.WindowTooLarge
else
@as(usize, @intCast(window_size_raw));
std.math.cast(usize, window_size_raw) orelse return error.WindowTooLarge;
const should_compute_checksum =
frame_header.descriptor.content_checksum_flag and verify_checksum;