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LibGUI: Add GFile and base class GIODevice.

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Working with the LibC API's is tedious, so let's add some comfy C++ API's.
This commit is contained in:
Andreas Kling 2019-03-17 15:54:43 +01:00
parent ef05d8cbf6
commit ce7017e1ec
6 changed files with 230 additions and 9 deletions
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56
LibGUI/GFile.cpp Normal file
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#include <LibGUI/GFile.h>
#include <unistd.h>
#include <fcntl.h>
#include <stdio.h>
GFile::GFile(const String& filename)
: m_filename(filename)
{
}
GFile::~GFile()
{
if (mode() != NotOpen)
close();
}
bool GFile::open(GIODevice::OpenMode mode)
{
int flags = 0;
if ((mode & GIODevice::ReadWrite) == GIODevice::ReadWrite) {
flags |= O_RDWR | O_CREAT;
} else if (mode & GIODevice::ReadOnly) {
flags |= O_RDONLY;
} else if (mode & GIODevice::WriteOnly) {
flags |= O_WRONLY | O_CREAT;
}
if (mode & GIODevice::Append)
flags |= O_APPEND;
if (mode & GIODevice::Truncate)
flags |= O_TRUNC;
if (mode & GIODevice::MustBeNew)
flags |= O_EXCL;
int fd = ::open(m_filename.characters(), flags, 0666);
if (fd < 0) {
set_error(errno);
return false;
}
set_fd(fd);
set_mode(mode);
return true;
}
bool GFile::close()
{
if (fd() < 0 || mode() == NotOpen)
return false;
int rc = ::close(fd());
if (rc < 0) {
set_error(rc);
return false;
}
set_fd(-1);
set_mode(GIODevice::NotOpen);
return true;
}