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Kernel: Make File::write() and File::read() return KResultOr<size_t>

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Instead of returning a ssize_t where negative values mean error,
we now return KResultOr<size_t> and use the error state to report
errors exclusively.
This commit is contained in:
Andreas Kling 2020-08-04 18:02:23 +02:00
parent 58feebeed2
commit 7a3ab6c517
58 changed files with 223 additions and 229 deletions
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6
Kernel/Console.cpp
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@ -61,18 +61,18 @@ bool Console::can_read(const Kernel::FileDescription&, size_t) const
return false;
}
ssize_t Console::read(Kernel::FileDescription&, size_t, u8*, ssize_t)
Kernel::KResultOr<size_t> Console::read(Kernel::FileDescription&, size_t, u8*, size_t)
{
// FIXME: Implement reading from the console.
// Maybe we could use a ring buffer for this device?
return 0;
}
ssize_t Console::write(Kernel::FileDescription&, size_t, const u8* data, ssize_t size)
Kernel::KResultOr<size_t> Console::write(Kernel::FileDescription&, size_t, const u8* data, size_t size)
{
if (!size)
return 0;
for (ssize_t i = 0; i < size; ++i)
for (size_t i = 0; i < size; ++i)
put_char(data[i]);
return size;
}