blob adaa3fcb (1659B) - Raw
1 const std = @import("../std.zig"); 2 const os = std.os; 3 const OutStream = std.io.OutStream; 4 const builtin = @import("builtin"); 5 6 /// TODO make a proposal to make `std.fs.File` use *FILE when linking libc and this just becomes 7 /// std.io.FileOutStream because std.fs.File.write would do this when linking 8 /// libc. 9 pub const COutStream = struct { 10 pub const Error = std.fs.File.WriteError; 11 pub const Stream = OutStream(Error); 12 13 stream: Stream, 14 c_file: *std.c.FILE, 15 16 pub fn init(c_file: *std.c.FILE) COutStream { 17 return COutStream{ 18 .c_file = c_file, 19 .stream = Stream{ .writeFn = writeFn }, 20 }; 21 } 22 23 fn writeFn(out_stream: *Stream, bytes: []const u8) Error!usize { 24 const self = @fieldParentPtr(COutStream, "stream", out_stream); 25 const amt_written = std.c.fwrite(bytes.ptr, 1, bytes.len, self.c_file); 26 if (amt_written >= 0) return amt_written; 27 switch (std.c._errno().*) { 28 0 => unreachable, 29 os.EINVAL => unreachable, 30 os.EFAULT => unreachable, 31 os.EAGAIN => unreachable, // this is a blocking API 32 os.EBADF => unreachable, // always a race condition 33 os.EDESTADDRREQ => unreachable, // connect was never called 34 os.EDQUOT => return error.DiskQuota, 35 os.EFBIG => return error.FileTooBig, 36 os.EIO => return error.InputOutput, 37 os.ENOSPC => return error.NoSpaceLeft, 38 os.EPERM => return error.AccessDenied, 39 os.EPIPE => return error.BrokenPipe, 40 else => |err| return os.unexpectedErrno(@intCast(usize, err)), 41 } 42 } 43 };