::std::streampos seekpos(::std::streampos sp, ::std::ios_base::openmode which = ::std::ios_base::in | ::std::ios_base::out)
{
if ( which & ::std::ios_base::in )
{
int64_t const cur = symsread-(egptr()-gptr());
int64_t const curlow = cur - static_cast<int64_t>(gptr()-eback());
int64_t const curhigh = cur + static_cast<int64_t>(egptr()-gptr());
// call relative seek, if target is in range
if ( sp >= curlow && sp <= curhigh )
return seekoff(static_cast<int64_t>(sp) - cur, ::std::ios_base::cur, which);
// target is out of range, we really need to seek
uint64_t tsymsread = (sp / buffersize)*buffersize;
symsread = tsymsread;
stream.clear();
stream.seekg( (symsread * b) / 8 );
setg(buffer.end(),buffer.end(),buffer.end());
underflow();
setg(eback(),gptr() + (static_cast<int64_t>(sp)-static_cast<int64_t>(tsymsread)), egptr());
return sp;
}
return -1;
}
void
_IO_unsave_markers (_IO_FILE *fp)
{
struct _IO_marker *mark = fp->_markers;
if (mark)
{
#ifdef TODO
streampos offset = seekoff (0, ios::cur, ios::in);
if (offset != EOF)
{
offset += eGptr () - Gbase ();
for ( ; mark != NULL; mark = mark->_next)
mark->set_streampos (mark->_pos + offset);
}
else
{
for ( ; mark != NULL; mark = mark->_next)
mark->set_streampos (EOF);
}
#endif
fp->_markers = 0;
}
if (_IO_have_backup (fp))
_IO_free_backup_area (fp);
}
no_copy_membuf&
no_copy_membuf::seekg (std::ios::off_type off, std::ios::seekdir dir) {
// Seek to the position supplied relatively.
seekoff(off, dir, std::ios::in);
return *this;
}
void FileStreamBuf::open(const std::string& path, std::ios::openmode mode)
{
poco_assert (_fd == -1);
_pos = 0;
_path = path;
setMode(mode);
resetBuffers();
int flags(0);
if (mode & std::ios::trunc)
flags |= O_TRUNC;
if (mode & std::ios::app)
flags |= O_APPEND;
if (mode & std::ios::out)
flags |= O_CREAT;
if ((mode & std::ios::in) && (mode & std::ios::out))
flags |= O_RDWR;
else if (mode & std::ios::in)
flags |= O_RDONLY;
else
flags |= O_WRONLY;
_fd = ::open(path.c_str(), flags, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH);
if (_fd == -1)
File::handleLastError(_path);
if ((mode & std::ios::app) || (mode & std::ios::ate))
seekoff(0, std::ios::end, mode);
}
int parsebuf::pbackfail(int c)
{
if (c == EOF)
return 0;
if (seekoff(-1, ios::cur) == EOF)
return EOF;
return (unsigned char)c;
}
int streambuf::pbackfail(int c)
{
if (_gptr > _eback)
_gptr--;
else if (seekoff(-1, ios::cur, ios::in) == EOF)
return EOF;
if (c != EOF && *_gptr != c)
*_gptr = c;
return (unsigned char)c;
}
int
streambuf::sputn(const char* s, streamsize n)
{
#if 0
if (openedFor & ios_base::app)
{
seekoff(0, ios_base::end, ios_base::out);
}
#endif
return xsputn(s, n);
}
int parsebuf::seek_in_line(int i)
{
#if 1
abort();
return 0; // Suppress warning.
#else
if (i > 0) {
size_t len = line_length();
if ((unsigned)i > len) i = len;
}
else if (i < -1) i = -1;
int new_pos = seekoff(pos_at_line_start + i, ios::beg);
if (new_pos == EOF)
return tell_in_line();
else return new_pos - pos_at_line_start;
#endif
}
void FileStreamBuf::open(const std::string& path, std::ios::openmode mode)
{
poco_assert (_handle == INVALID_HANDLE_VALUE);
_path = path;
_pos = 0;
setMode(mode);
resetBuffers();
DWORD access = 0;
if (mode & std::ios::in)
access |= GENERIC_READ;
if (mode & std::ios::out)
access |= GENERIC_WRITE;
DWORD shareMode = FILE_SHARE_READ;
if (!(mode & std::ios::out))
shareMode |= FILE_SHARE_WRITE;
DWORD creationDisp = OPEN_EXISTING;
if (mode & std::ios::trunc)
creationDisp = CREATE_ALWAYS;
else if (mode & std::ios::out)
creationDisp = OPEN_ALWAYS;
DWORD flags = FILE_ATTRIBUTE_NORMAL;
#if defined (POCO_WIN32_UTF8)
std::wstring utf16Path;
UnicodeConverter::toUTF16(path, utf16Path);
_handle = CreateFile2(utf16Path.c_str(), access, shareMode, creationDisp, NULL);
#else
_handle = CreateFileA(path.c_str(), access, shareMode, NULL, creationDisp, flags, NULL);
#endif
if (_handle == INVALID_HANDLE_VALUE)
File::handleLastError(_path);
if ((mode & std::ios::ate) || (mode & std::ios::app))
seekoff(0, std::ios::end, mode);
}
filebuf* filebuf::open(const char *filename, const char *mode)
{
if (is_open())
return NULL;
int oflags = 0, omode;
int read_write;
int oprot = 0666;
switch (*mode++) {
case 'r':
omode = O_RDONLY;
read_write = _S_NO_WRITES;
break;
case 'w':
omode = O_WRONLY;
oflags = O_CREAT|O_TRUNC;
read_write = _S_NO_READS;
break;
case 'a':
omode = O_WRONLY;
oflags = O_CREAT|O_APPEND;
read_write = _S_NO_READS|_S_IS_APPENDING;
break;
default:
errno = EINVAL;
return NULL;
}
if (mode[0] == '+' || (mode[0] == 'b' && mode[1] == '+')) {
omode = O_RDWR;
read_write = 0;
}
int fdesc = ::open(filename, omode|oflags, oprot);
if (fdesc < 0)
return NULL;
_fb._fileno = fdesc;
xsetflags(read_write, _S_NO_READS+_S_NO_WRITES+_S_IS_APPENDING);
if (read_write & _S_IS_APPENDING)
if (seekoff(0, ios::end) == EOF)
return NULL;
_link_in();
return this;
}
/**
* seek to absolute position
**/
::std::streampos seekpos(::std::streampos sp, ::std::ios_base::openmode which = ::std::ios_base::in | ::std::ios_base::out)
{
if ( which & ::std::ios_base::in )
{
// current position
int64_t const cur = symsread-(egptr()-gptr());
// current start of buffer (relative)
int64_t const curlow = cur - static_cast<int64_t>(gptr()-eback());
// current end of buffer (relative)
int64_t const curhigh = cur + static_cast<int64_t>(egptr()-gptr());
// call relative seek, if target is in range
if ( sp >= curlow && sp <= curhigh )
return seekoff(static_cast<int64_t>(sp) - cur, ::std::ios_base::cur, which);
// target is out of range, we really need to seek
uint64_t tsymsread = (sp / blocksize)*blocksize;
// set symsread
symsread = tsymsread;
// reinit
init(true);
// read next block
underflow();
// skip bytes in block to get to final position
setg(
eback(),
gptr() + (static_cast<int64_t>(sp)-static_cast<int64_t>(tsymsread)),
egptr()
);
return sp;
}
return -1;
}
filebuf* filebuf::open(const char *filename, ios::openmode mode, int prot)
{
if (is_open())
return NULL;
int posix_mode;
int read_write;
if (mode & ios::app)
mode |= ios::out;
if ((mode & (ios::in|ios::out)) == (ios::in|ios::out)) {
posix_mode = O_RDWR;
read_write = 0;
}
else if (mode & ios::out)
posix_mode = O_WRONLY, read_write = _S_NO_READS;
else if (mode & (int)ios::in)
posix_mode = O_RDONLY, read_write = _S_NO_WRITES;
else
posix_mode = 0, read_write = _S_NO_READS+_S_NO_WRITES;
if ((mode & (int)ios::trunc) || mode == (int)ios::out)
posix_mode |= O_TRUNC;
if (mode & ios::app)
posix_mode |= O_APPEND, read_write |= _S_IS_APPENDING;
if (!(mode & (int)ios::nocreate) && mode != ios::in)
posix_mode |= O_CREAT;
if (mode & (int)ios::noreplace)
posix_mode |= O_EXCL;
int fd = ::open(filename, posix_mode, prot);
if (fd < 0)
return NULL;
_fb._fileno = fd;
xsetflags(read_write, _S_NO_READS+_S_NO_WRITES+_S_IS_APPENDING);
if (mode & (ios::ate|ios::app)) {
if (seekoff(0, ios::end) == EOF)
return NULL;
}
_link_in();
return this;
}
int
streambuf::sputc(char c)
{
#if 0
if (openedFor & ios_base::app)
{
seekoff(0, ios_base::end, ios_base::out);
}
if (mpnext < mpend)
{
*mpnext = c;
++mpnext;
}
else
{
return overflow(traits::to_int(c));
}
return traits::to_int(c);
#else
return overflow(traits::to_int(c));
#endif
}
std::streambuf::pos_type membuf::seekpos(pos_type sp,
std::ios_base::openmode which)
{ // change to specified position, according to mode
return seekoff(sp, std::ios_base::beg, which);
}
std::streampos iconvstreambuf::seekpos(std::streampos sp,
std::ios_base::openmode which)
{
return seekoff(sp, std::ios_base::beg, which);
}
streampos streambuf::seekpos(streampos pos, int mode)
{
return seekoff(streamoff(pos), ios::beg, mode);
}
std::streampos streambuf::seekpos(std::streampos off,std::ios_base::openmode m)
{
return seekoff(std::streamoff(off),std::ios_base::beg,m);
}
FileStreamBuf::pos_type FileStreamBuf::seekpos(pos_type pos, std::ios_base::openmode mode)
{
if(pos != pos_type(off_type(pos)))
return traits_type::eof();
return seekoff(off_type(pos), std::ios_base::beg, mode);
}
base_streambuf::pos_type
base_streambuf::seekpos( pos_type pos, std::ios_base::openmode which )
{
return seekoff( pos, std::ios_base::beg, which );
}
filebuf* filebuf::open(const char *filename, const char *mode)
{
// fdopen in stdio need this.
if (is_open()) {
// file is open. we cannot open a new file
if (filename) {
errno = EINVAL;
return NULL;
}
}
else {
// file is not open. we have to open a new file
if (filename == NULL) {
errno = EINVAL;
return NULL;
}
}
int oflags = 0, omode;
int read_write;
int oprot = 0666;
switch (*mode++) {
case 'r':
omode = O_RDONLY;
read_write = _S_NO_WRITES;
break;
case 'w':
omode = O_WRONLY;
oflags = O_CREAT|O_TRUNC;
read_write = _S_NO_READS;
break;
case 'a':
omode = O_WRONLY;
oflags = O_CREAT|O_APPEND;
read_write = _S_NO_READS|_S_IS_APPENDING;
break;
default:
errno = EINVAL;
return NULL;
}
if (mode[0] == '+' || (mode[0] == 'b' && mode[1] == '+')) {
omode = O_RDWR;
read_write &= _S_IS_APPENDING;
}
xsetflags(read_write, _S_NO_READS+_S_NO_WRITES+_S_IS_APPENDING);
if (filename) {
int fdesc = ::open(filename, omode|oflags, oprot);
if (fdesc < 0) return NULL;
_fb._fileno = fdesc;
if (read_write & _S_IS_APPENDING)
if (seekoff(0, ios::end) == EOF && errno != ESPIPE)
return NULL;
}
else {
// Get old status flag.
int status_flag = ::fcntl (_fb._fileno, F_GETFL);
if (status_flag < 0) return NULL;
// We should only do O_APPEND.
#if 0
// We cannot change the access mode for an open file descriptor.
if ((status_flag & O_ACCMODE) != omode) {
errno = EINVAL;
return NULL;
}
#endif
// Get new status flag.
oflags &= O_APPEND;
// check if we need to change the status flag.
if ((status_flag & O_APPEND) != oflags) {
// Set new status flag.
status_flag = (status_flag & ~O_APPEND) | oflags;
if (::fcntl (_fb._fileno, F_SETFL, status_flag) < 0)
return NULL;
}
// Seek off to the current file position.
_fb._offset = -1;
if (seekoff(0, ios::cur) == EOF)
if (errno != ESPIPE) return NULL;
else _fb._offset = 0;
}
_link_in();
return this;
}
std::streambuf::pos_type IOBuffer::seekpos(std::streambuf::pos_type p, std::ios::openmode mode)
{
return seekoff(p, std::ios::beg, mode);
}
std::streampos CInputStreamBuffer::seekpos(std::streampos sp, std::ios_base::openmode which)
{
return seekoff(off_type(sp), std::ios_base::beg, which);
}
bool filebuf::truncate()
{
return truncate( seekoff(0, std::ios_base::cur, std::ios_base::out) );
}
streamfilter::pos_type streamfilter::seekpos(streamfilter::pos_type pos, std::ios_base::openmode mode) {
return seekoff(pos, std::ios::beg, mode);
}
strstreambuf::pos_type
strstreambuf::seekpos(pos_type pos, ios_base::openmode mode) {
return seekoff(pos - pos_type(off_type(0)), ios_base::beg, mode);
}
/***
*olebuf* olebuf::open(const char* name, int mode, int share) - olebuf open
*
*Purpose:
* olebuf open() member function. Open a file and attach to olebuf
* object.
*
*Entry:
* name = file name string.
* mode = open mode: Combination of ios:: in, out, binary, nocreate, app,
* ate, noreplace and trunc. See spec. for details on behavior.
* share = share mode (optional). sh_compat, sh_none, sh_read, sh_write.
*
*Exit:
* Returns this pointer or NULL if error.
*
*Exceptions:
* Returns NULL if olebuf is already attached to an open file, or if
* invalid mode options, or if call to _sopen or olebuf::seekoff() fails.
*
*******************************************************************************/
olebuf* olebuf::open(IStorage *pIStg, const wchar_t* name, int mode, int share)
{
DWORD ole_mode = 0;
if (x_pIStrm!=NULL)
return NULL; // error if already open
// translate mode argument
if (!(mode & ios::nocreate))
ole_mode |= STGM_CREATE;
if (mode & ios::noreplace)
ole_mode |= STGM_FAILIFTHERE;
if (mode & ios::app)
{
mode |= ios::out;
// ole_mode |= O_APPEND;
}
if (mode & ios::trunc)
{
mode |= ios::out; // IMPLIED
// ole_mode |= O_TRUNC;
}
if (mode & ios::out)
{
if (mode & ios::in)
{
ole_mode |= STGM_READWRITE;
}
else
{
ole_mode |= STGM_WRITE;
}
if (!(mode & (ios::in|ios::app|ios::ate|ios::noreplace)))
{
mode |= ios::trunc; // IMPLIED
// ole_mode |= O_TRUNC;
}
}
else if (mode & ios::in)
ole_mode |= STGM_READ;
else
return NULL; // error if not ios:in or ios::out
share &= (sh_read|sh_write|sh_none); // ignore other bits
if (share) // optimization openprot serves as default
{
switch (share)
{
/* case 03000 : Reserved for sh_compat */
// case sh_none :
case 04000 :
ole_mode |= STGM_SHARE_EXCLUSIVE;
break;
// case sh_read :
case 05000 :
ole_mode |= STGM_SHARE_DENY_WRITE;
break;
// case sh_write :
case 06000 :
ole_mode |= STGM_SHARE_DENY_READ;
break;
// case (sh_read|sh_write) :
case 07000 :
ole_mode |= STGM_SHARE_DENY_NONE;
break;
default : // unrecognized value same as default
break;
};
}
HRESULT hr;
if (ole_mode & STGM_CREATE) // create new substream
hr = pIStg -> CreateStream (name, ole_mode, 0L, 0L, &x_pIStrm);
else // open existing stream
hr = pIStg -> OpenStream (name, NULL, ole_mode, 0L, &x_pIStrm);
if (FAILED(hr)) {
SetLastError (hr);
return NULL;
}
lock();
x_fOpened = 1;
if ((!unbuffered()) && (!ebuf()))
{
char * sbuf = new char[BUFSIZ];
if (!sbuf)
{
unbuffered(1);
}
else
{
streambuf::setb(sbuf,sbuf+BUFSIZ,1);
}
}
if (mode & ios::ate)
if (seekoff(0,ios::end,mode)==EOF)
{
close();
unlock();
return NULL;
}
unlock();
return this;
}
virtual pos_type seekpos(pos_type pos, std::ios_base::openmode mode
= std::ios_base::in | std::ios_base::out)
{ return seekoff(pos - pos_type(off_type(0)), std::ios_base::beg, mode); }
/* virtual */ strstreambuf::pos_type
strstreambuf::seekoff (off_type off, ios::seekdir way, ios::openmode which)
{
_RWSTD_ASSERT (_C_is_valid ());
// should implicitly hold as long as ios::seekdir is an enum
_RWSTD_ASSERT (ios::beg == way || ios::cur == way || ios::end == way);
_RWSTD_ASSERT (_C_is_valid ());
// determine seekable area - D.7.1, p4
char* const seeklo = eback ();
char* const seekhi = epptr () ? epptr () : egptr ();
const char* const xnext = which & ios::in ? gptr () : pptr ();
const char* const xbeg = which & ios::in ? eback () : pbase ();
// D.7.1.3, p13
if (!xnext)
return pos_type (off_type (-1));
off_type saved_off = off;
// compute new offset - D.7.1.3, p13, table 105
if (ios::cur == way)
off += off_type (xnext - xbeg);
else if (ios::end == way)
off += off_type (seekhi - xbeg);
// test conditions in D.7.1.3, p13, table 105, row 4
if (off < seeklo - xbeg || off > seekhi - xbeg)
off = -1; // failure
else if (which & ios::in) { // position input sequence
// fail if `way' is `cur', otherwise position output sequence first
if ( which & ios::out
&& ( way == ios::cur
|| pos_type (-1) == seekoff (saved_off, way, ios::out)))
return pos_type (off_type (-1));
// adjust input sequence as necessary to maintain invariant
if (off <= egptr () - eback ())
setg (eback (), eback () + off, egptr ());
else if (off <= pptr () - egptr ()) // advance egptr()
setg (eback (), eback () + off, pptr ());
else // advance egptr() even further
setg (eback (), eback () + off, epptr ());
}
else if (which & ios::out) { // position output sequence
if (seeklo + off < pbase ()) {
// adjust beginning of output sequence, then increment pptr()
setp (seeklo, epptr ());
pbump (off);
}
else {
// reset pptr() first, then increment it by offset
setp (pbase (), epptr ());
pbump (off - (pbase () - seeklo));
}
}
else
off = -1; // failure
_RWSTD_ASSERT (_C_is_valid ());
return pos_type (off);
}
PRfilebuf*
PRfilebuf::open(const char *name, int mode, int flags)
{
if (_fd != 0)
return 0; // error if already open
PRIntn PRmode = 0;
// translate mode argument
if (!(mode & ios::nocreate))
PRmode |= PR_CREATE_FILE;
//if (mode & ios::noreplace)
// PRmode |= O_EXCL;
if (mode & ios::app){
mode |= ios::out;
PRmode |= PR_APPEND;
}
if (mode & ios::trunc){
mode |= ios::out; // IMPLIED
PRmode |= PR_TRUNCATE;
}
if (mode & ios::out){
if (mode & ios::in)
PRmode |= PR_RDWR;
else
PRmode |= PR_WRONLY;
if (!(mode & (ios::in|ios::app|ios::ate|ios::noreplace))){
mode |= ios::trunc; // IMPLIED
PRmode |= PR_TRUNCATE;
}
}else if (mode & ios::in)
PRmode |= PR_RDONLY;
else
return 0; // error if not ios:in or ios::out
//
// The usual portable across unix crap...
// NT gets a hokey piece of junk layer that prevents
// access to the API.
#ifdef WIN32
_fd = PR_Open(name, PRmode, PRmode);
#else
_fd = PR_Open(name, PRmode, flags);
#endif
if (_fd == 0)
return 0;
_opened = PR_TRUE;
if ((!unbuffered()) && (!ebuf())){
char * sbuf = new char[STRM_BUFSIZ];
if (!sbuf)
unbuffered(1);
else{
_allocated = PR_TRUE;
streambuf::setb(sbuf,sbuf+STRM_BUFSIZ,0);
}
}
if (mode & ios::ate){
if (seekoff(0,ios::end,mode)==EOF){
close();
return 0;
}
}
return this;
}
mem_streambuf::pos_type mem_streambuf::seekpos( pos_type pos,
ios_base::openmode mode ) {
return seekoff( pos, ios_base::beg, mode );
}