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/*
* fileio.h
*
* Created on: 25.07.2010
* Author: ed
*/
#ifndef FILEIO_H_
#define FILEIO_H_
#include "meta.h"
#include <errno.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <cstdio>
#include <unistd.h>
#ifdef HAVE_LINUX_SENDFILE
#include <sys/sendfile.h>
#endif
#ifndef O_BINARY
#define O_BINARY 0 // ignore on Unix
#endif
namespace acng
{
int falloc_helper(int fd, off_t start, off_t len);
ssize_t sendfile_generic(int out_fd, int in_fd, off_t *offset, size_t count);
class Cstat : public stat
{
bool bResult;
public:
inline Cstat(cmstring &s) { bResult = !::stat(s.c_str(), static_cast<struct stat*>(this)); }
inline operator bool() const { return bResult; }
};
bool FileCopy_generic(cmstring &from, cmstring &to);
// in fact, pipe&splice&splice method works about 10% but only without considering other IO costs
// with them, the benefit is neglible
//#if defined(HAVE_LINUX_SPLICE) && defined(HAVE_PREAD)
//bool FileCopy(cmstring &from, cmstring &to);
//#else
#define FileCopy(x,y) FileCopy_generic(x,y)
//#endif
bool LinkOrCopy(const mstring &from, const mstring &to);
void set_nb(int fd);
void set_block(int fd);
#define forceclose(fd) { while(0 != ::close(fd)) { if(errno != EINTR) break; }; fd=-1; }
#define checkforceclose(fd) if(fd>=0){ while(0 != ::close(fd)) { if(errno != EINTR) break; }; fd=-1; }
inline void checkForceFclose(FILE* &fh)
{
if (fh)
{
int fd = fileno(fh);
if (0 != ::fclose(fh) && errno != EBADF)
{
forceclose(fd);
}
fh = nullptr;
}
}
// more efficient than tDtorEx with lambda
struct FILE_RAII
{
FILE *p = nullptr;
inline FILE_RAII() {};
inline ~FILE_RAII() { close(); }
operator FILE* () const { return p; }
inline void close() { checkForceFclose(p); };
private:
FILE_RAII(const FILE_RAII&);
FILE_RAII operator=(const FILE_RAII&);
};
void mkdirhier(cmstring& path);
bool xtouch(cmstring &wanted);
void mkbasedir(const mstring & path);
/*
class tLazyStat
{
LPCSTR path;
struct stat stbuf;
inline bool AccessFile() { if(path)
public:
inline tLazyStat(LPCSTR p) : path(p) {};
operator bool() const;
off_t GetSize() const;
off_t GetSpace() const;
};
*/
}
#endif /* FILEIO_H_ */
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