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std.fs.File: fix missing end of stream

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This commit is contained in:
Andrew Kelley 2025-05-02 19:45:51 -07:00
parent 5ac895c820
commit b0d825948a
1 changed files with 4 additions and 2 deletions
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6
lib/std/fs/File.zig
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@ -1158,20 +1158,21 @@ pub const Reader = struct {
// end.
fallback: {
if (r.size_err == null and r.seek_err == null) break :fallback;
var trash_buffer: [std.atomic.cache_line]u8 = undefined;
var trash_buffer: [128]u8 = undefined;
const trash = &trash_buffer;
if (is_windows) {
const n = windows.ReadFile(file.handle, trash, null) catch |err| {
r.err = err;
return error.ReadFailed;
};
if (n == 0) return error.EndOfStream;
r.pos = pos + n;
return n;
}
var iovecs: [max_buffers_len]std.posix.iovec = undefined;
var iovecs_i: usize = 0;
var remaining = @intFromEnum(limit);
while (remaining > 0 and iovecs_i >= iovecs.len) {
while (remaining > 0 and iovecs_i < iovecs.len) {
iovecs[iovecs_i] = .{ .base = trash, .len = @min(trash.len, remaining) };
remaining -= iovecs[iovecs_i].len;
iovecs_i += 1;
@ -1180,6 +1181,7 @@ pub const Reader = struct {
r.err = err;
return error.ReadFailed;
};
if (n == 0) return error.EndOfStream;
r.pos = pos + n;
return n;
}