45 lines
1.7 KiB
Zig
45 lines
1.7 KiB
Zig
const std = @import("../std.zig");
|
|
const OutStream = std.io.OutStream;
|
|
const builtin = @import("builtin");
|
|
const posix = std.os.posix;
|
|
|
|
/// TODO make std.os.FILE use *FILE when linking libc and this just becomes
|
|
/// std.io.FileOutStream because std.os.File.write would do this when linking
|
|
/// libc.
|
|
pub const COutStream = struct {
|
|
pub const Error = std.os.File.WriteError;
|
|
pub const Stream = OutStream(Error);
|
|
|
|
stream: Stream,
|
|
c_file: *std.c.FILE,
|
|
|
|
pub fn init(c_file: *std.c.FILE) COutStream {
|
|
return COutStream{
|
|
.c_file = c_file,
|
|
.stream = Stream{ .writeFn = writeFn },
|
|
};
|
|
}
|
|
|
|
fn writeFn(out_stream: *Stream, bytes: []const u8) Error!void {
|
|
const self = @fieldParentPtr(COutStream, "stream", out_stream);
|
|
const amt_written = std.c.fwrite(bytes.ptr, 1, bytes.len, self.c_file);
|
|
if (amt_written == bytes.len) return;
|
|
const errno = std.c._errno().*;
|
|
switch (errno) {
|
|
0 => unreachable,
|
|
posix.EINVAL => unreachable,
|
|
posix.EFAULT => unreachable,
|
|
posix.EAGAIN => unreachable, // this is a blocking API
|
|
posix.EBADF => unreachable, // always a race condition
|
|
posix.EDESTADDRREQ => unreachable, // connect was never called
|
|
posix.EDQUOT => return error.DiskQuota,
|
|
posix.EFBIG => return error.FileTooBig,
|
|
posix.EIO => return error.InputOutput,
|
|
posix.ENOSPC => return error.NoSpaceLeft,
|
|
posix.EPERM => return error.AccessDenied,
|
|
posix.EPIPE => return error.BrokenPipe,
|
|
else => return std.os.unexpectedErrorPosix(@intCast(usize, errno)),
|
|
}
|
|
}
|
|
};
|