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#include "file.h"
#include <fcntl.h>
#include <errno.h>
#include <sys/stat.h>
#ifdef _win32_
#define S_ISREG(x) !!(x & S_IFREG)
#endif
TFileManipBase::TFileManipBase()
: FileBased(true)
{
}
i64 TFileManipBase::DoSeek(i64 offset, int whence, bool isStreamOpen) {
if (!isStreamOpen)
return -1;
VerifyRandomAccess();
return File.Seek(offset, (SeekDir)whence);
}
int TFileManipBase::DoFileOpen(const TFile& file) {
File = file;
SetFileBased(IsFileBased());
return (File.IsOpen()) ? 0 : MBDB_OPEN_ERROR;
}
int TFileManipBase::DoFileClose() {
if (File.IsOpen()) {
File.Close();
return MBDB_ALREADY_INITIALIZED;
}
return 0;
}
int TFileManipBase::IsFileBased() const {
bool fileBased = true;
#if defined(_win_)
#elif defined(_unix_)
FHANDLE h = File.GetHandle();
struct stat sb;
fileBased = false;
if (h != INVALID_FHANDLE && !::fstat(h, &sb) && S_ISREG(sb.st_mode)) {
fileBased = true;
}
#else
#error
#endif
return fileBased;
}
TInputFileManip::TInputFileManip()
: InputStream(nullptr)
{
}
int TInputFileManip::Open(const char* fname, bool direct) {
int ret;
return (ret = DoClose()) ? ret : DoStreamOpen(TFile(fname, RdOnly | (direct ? DirectAligned : EOpenMode())));
}
int TInputFileManip::Open(IInputStream& input) {
int ret;
return (ret = DoClose()) ? ret : DoStreamOpen(&input);
}
int TInputFileManip::Open(TAutoPtr<IInputStream> input) {
int ret;
return (ret = DoClose()) ? ret : DoStreamOpen(input.Release());
}
int TInputFileManip::Init(const TFile& file) {
int ret;
if (ret = DoClose())
return ret;
DoStreamOpen(file);
return 0;
}
int TInputFileManip::Close() {
DoClose();
return 0;
}
ssize_t TInputFileManip::Read(void* buf, unsigned len) {
if (!IsStreamOpen())
return -1;
return InputStream->Load(buf, len);
}
IInputStream* TInputFileManip::CreateStream(const TFile& file) {
return new TUnbufferedFileInput(file);
}
TMappedInputPageFile::TMappedInputPageFile()
: Pagesize(0)
, Error(0)
, Pagenum(0)
, Recordsig(0)
, Open(false)
{
Term();
}
TMappedInputPageFile::~TMappedInputPageFile() {
Term();
}
int TMappedInputPageFile::Init(const char* fname, ui32 recsig, ui32* gotRecordSig, bool) {
Mappedfile.init(fname);
Open = true;
TDatMetaPage* meta = (TDatMetaPage*)Mappedfile.getData();
if (gotRecordSig)
*gotRecordSig = meta->RecordSig;
if (meta->MetaSig != METASIG)
Error = MBDB_BAD_METAPAGE;
else if (meta->RecordSig != recsig)
Error = MBDB_BAD_RECORDSIG;
if (Error) {
Mappedfile.term();
return Error;
}
size_t fsize = Mappedfile.getSize();
if (fsize < METASIZE)
return Error = MBDB_BAD_FILE_SIZE;
fsize -= METASIZE;
if (fsize % meta->PageSize)
return Error = MBDB_BAD_FILE_SIZE;
Pagenum = (int)(fsize / meta->PageSize);
Pagesize = meta->PageSize;
Recordsig = meta->RecordSig;
Error = 0;
return Error;
}
int TMappedInputPageFile::Term() {
Mappedfile.term();
Open = false;
return 0;
}
TOutputFileManip::TOutputFileManip()
: OutputStream(nullptr)
{
}
int TOutputFileManip::Open(const char* fname, EOpenMode mode) {
if (IsStreamOpen()) {
return MBDB_ALREADY_INITIALIZED; // should it be closed as TInputFileManip
}
try {
if (unlink(fname) && errno != ENOENT) {
if (strncmp(fname, "/dev/std", 8))
return MBDB_OPEN_ERROR;
}
TFile file(fname, mode);
DoStreamOpen(file);
} catch (const TFileError&) {
return MBDB_OPEN_ERROR;
}
return 0;
}
int TOutputFileManip::Open(IOutputStream& output) {
if (IsStreamOpen())
return MBDB_ALREADY_INITIALIZED;
DoStreamOpen(&output);
return 0;
}
int TOutputFileManip::Open(TAutoPtr<IOutputStream> output) {
if (IsStreamOpen())
return MBDB_ALREADY_INITIALIZED;
DoStreamOpen(output.Release());
return 0;
}
int TOutputFileManip::Init(const TFile& file) {
if (IsStreamOpen())
return MBDB_ALREADY_INITIALIZED; // should it be closed as TInputFileManip
DoStreamOpen(file);
return 0;
}
int TOutputFileManip::Rotate(const char* newfname) {
if (!IsStreamOpen()) {
return MBDB_NOT_INITIALIZED;
}
try {
TFile file(newfname, WrOnly | OpenAlways | TruncExisting | ARW | AWOther);
DoClose();
DoStreamOpen(file);
} catch (const TFileError&) {
return MBDB_OPEN_ERROR;
}
return 0;
}
int TOutputFileManip::Close() {
DoClose();
return 0;
}
int TOutputFileManip::Write(const void* buf, unsigned len) {
if (!IsStreamOpen())
return -1;
OutputStream->Write(buf, len);
return len;
}
IOutputStream* TOutputFileManip::CreateStream(const TFile& file) {
return new TUnbufferedFileOutput(file);
}
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