truck/Common/posix.cpp

// Truck Computer Dooom!
//
// Douglas Thrift
//
// $Id$

#ifdef _GNU_SOURCE
#undef _GNU_SOURCE
#endif

#define _XOPEN_SOURCE 600

#include <fcntl.h>

#include "posix.hpp"

namespace Posix
{

Error::Error() : code(errno)
{
        CheckError(::strerror_r(code, message, sizeof (message)));
}

int Open(const std::string &path, int flags, ::mode_t mode)
{
        return SysCall(::open, path.c_str(), flags, mode);
}

size_t Read(int fd, void *buffer, size_t bytes)
{
        return SysCall(::read, fd, buffer, bytes);
}

size_t ReadMost(int fd, void *buffer, size_t bytes)
{
        size_t rest(bytes);
        uint8_t *data = reinterpret_cast<uint8_t *>(buffer);

        while (rest != 0)
        {
                size_t read(Read(fd, data, rest));

                if (read == 0)
                        return bytes - rest;

                data += read;
                rest -= read;
        }

        return bytes;
}

}
Revision:	14
Committed:	2007-05-14T18:24:34-07:00 (18 years, 1 month ago) by douglas
File size:	788 byte(s)
Log Message:	Switch back from Menes C++ to stl and hacks.
#	User	Rev	Content
1	douglas	2	// Truck Computer Dooom!
2			//
3			// Douglas Thrift
4			//
5			// $Id$
6
7			#ifdef _GNU_SOURCE
8			#undef _GNU_SOURCE
9			#endif
10
11			#define _XOPEN_SOURCE 600
12
13	douglas	14	#include <fcntl.h>
14
15	douglas	2	#include "posix.hpp"
16
17			namespace Posix
18			{
19
20			Error::Error() : code(errno)
21			{
22			CheckError(::strerror_r(code, message, sizeof (message)));
23			}
24
25	douglas	14	int Open(const std::string &path, int flags, ::mode_t mode)
26			{
27			return SysCall(::open, path.c_str(), flags, mode);
28	douglas	2	}
29	douglas	14
30			size_t Read(int fd, void *buffer, size_t bytes)
31			{
32			return SysCall(::read, fd, buffer, bytes);
33			}
34
35			size_t ReadMost(int fd, void *buffer, size_t bytes)
36			{
37			size_t rest(bytes);
38			uint8_t data = reinterpret_cast<uint8_t >(buffer);
39
40			while (rest != 0)
41			{
42			size_t read(Read(fd, data, rest));
43
44			if (read == 0)
45			return bytes - rest;
46
47			data += read;
48			rest -= read;
49			}
50
51			return bytes;
52			}
53
54			}