// For compilers that support precompilation, includes "wx.h".
#include "wx/wxprec.h"
-#include <ctype.h>
-#include <wx/stream.h>
-#include <wx/datstrm.h>
-#include <wx/objstrm.h>
#ifdef __BORLANDC__
-#pragma hdrstop
+ #pragma hdrstop
+#endif
+
+#ifndef WX_PRECOMP
+ #include "wx/defs.h"
#endif
+#if wxUSE_STREAMS
+
+#include <ctype.h>
+#include "wx/stream.h"
+#include "wx/datstrm.h"
+#include "wx/objstrm.h"
+
+#define BUF_TEMP_SIZE 10000
+
// ----------------------------------------------------------------------------
// wxStreamBuffer
// ----------------------------------------------------------------------------
-wxStreamBuffer::wxStreamBuffer(wxInputStream& i_stream)
+#define CHECK_ERROR(err) \
+ if (m_stream->m_lasterror == wxStream_NOERROR) \
+ m_stream->m_lasterror = err
+
+wxStreamBuffer::wxStreamBuffer(wxStreamBase& stream, BufMode mode)
: m_buffer_start(NULL), m_buffer_end(NULL), m_buffer_pos(NULL),
- m_buffer_size(0), m_istream(&i_stream), m_ostream(NULL)
+ m_buffer_size(0), m_fixed(TRUE), m_flushable(TRUE), m_stream(&stream),
+ m_mode(mode), m_destroybuf(FALSE), m_destroystream(FALSE)
{
}
-wxStreamBuffer::wxStreamBuffer(wxOutputStream& o_stream)
+wxStreamBuffer::wxStreamBuffer(BufMode mode)
: m_buffer_start(NULL), m_buffer_end(NULL), m_buffer_pos(NULL),
- m_buffer_size(0), m_istream(NULL), m_ostream(&o_stream)
+ m_buffer_size(0), m_fixed(TRUE), m_flushable(FALSE), m_stream(NULL),
+ m_mode(mode), m_destroybuf(FALSE), m_destroystream(TRUE)
{
+ m_stream = new wxStreamBase();
}
-wxStreamBuffer::~wxStreamBuffer()
+wxStreamBuffer::wxStreamBuffer(const wxStreamBuffer& buffer)
{
- wxDELETEA(m_buffer_start);
+ m_buffer_start = buffer.m_buffer_start;
+ m_buffer_end = buffer.m_buffer_end;
+ m_buffer_pos = buffer.m_buffer_pos;
+ m_buffer_size = buffer.m_buffer_size;
+ m_fixed = buffer.m_fixed;
+ m_flushable = buffer.m_flushable;
+ m_stream = buffer.m_stream;
+ m_mode = buffer.m_mode;
+ m_destroybuf = FALSE;
+ m_destroystream = FALSE;
}
-void wxStreamBuffer::WriteBack(char c)
+wxStreamBuffer::~wxStreamBuffer()
{
- if (m_ostream)
- return;
-
- // Assume that if we write "back" we have read a few bytes: so we have some
- // space.
-
- m_buffer_pos--;
- *m_buffer_pos = c;
+ if (m_destroybuf)
+ wxDELETEA(m_buffer_start);
+ if (m_destroystream)
+ delete m_stream;
}
void wxStreamBuffer::SetBufferIO(char *buffer_start, char *buffer_end)
{
- m_buffer_pos = m_buffer_start = buffer_start;
- m_buffer_end = buffer_end;
+ if (m_destroybuf)
+ wxDELETEA(m_buffer_start);
+ m_buffer_start = buffer_start;
+ m_buffer_end = buffer_end;
m_buffer_size = m_buffer_end-m_buffer_start;
+ m_destroybuf = FALSE;
+ ResetBuffer();
}
void wxStreamBuffer::SetBufferIO(size_t bufsize)
{
- if (m_buffer_start)
- delete[] m_buffer_start;
+ char *b_start;
+
+ if (m_destroybuf)
+ wxDELETEA(m_buffer_start);
if (!bufsize) {
- m_buffer_start = NULL;
- m_buffer_end = NULL;
- m_buffer_pos = NULL;
+ m_buffer_start = (char*)NULL;
+ m_buffer_end = (char*)NULL;
+ m_buffer_pos = (char*)NULL;
m_buffer_size = 0;
+ return;
}
- m_buffer_start = new char[bufsize];
- m_buffer_end = m_buffer_start + bufsize;
- if (m_istream)
- m_buffer_pos = m_buffer_end;
- else
- m_buffer_pos = m_buffer_start;
- m_buffer_size = bufsize;
+ b_start = new char[bufsize];
+ SetBufferIO(b_start, b_start + bufsize);
+ m_destroybuf = TRUE;
}
void wxStreamBuffer::ResetBuffer()
{
- if (m_istream)
+ m_stream->m_lasterror = wxStream_NOERROR;
+ m_stream->m_lastcount = 0;
+ if (m_mode == read && m_flushable)
m_buffer_pos = m_buffer_end;
else
m_buffer_pos = m_buffer_start;
}
-void wxStreamBuffer::Read(void *buffer, size_t size)
+bool wxStreamBuffer::FillBuffer()
{
- wxASSERT(m_istream != NULL);
+ size_t count;
- // ------------------
- // Buffering disabled
- // ------------------
+ count = m_stream->OnSysRead(m_buffer_start, m_buffer_size);
+ m_buffer_end = m_buffer_start+count;
+ m_buffer_pos = m_buffer_start;
+
+ if (count == 0)
+ return FALSE;
+ return TRUE;
+}
+
+bool wxStreamBuffer::FlushBuffer()
+{
+ size_t count, current;
+
+ if (m_buffer_pos == m_buffer_start || !m_flushable)
+ return FALSE;
+
+ current = m_buffer_pos-m_buffer_start;
+ count = m_stream->OnSysWrite(m_buffer_start, current);
+ if (count != current)
+ return FALSE;
+ m_buffer_pos = m_buffer_start;
+
+ return TRUE;
+}
+
+void wxStreamBuffer::GetFromBuffer(void *buffer, size_t size)
+{
+ size_t s_toget = m_buffer_end-m_buffer_pos;
+
+ if (size < s_toget)
+ s_toget = size;
+
+ memcpy(buffer, m_buffer_pos, s_toget);
+ m_buffer_pos += s_toget;
+}
+
+void wxStreamBuffer::PutToBuffer(const void *buffer, size_t size)
+{
+ size_t s_toput = m_buffer_end-m_buffer_pos;
+
+ if (s_toput < size && !m_fixed) {
+ if (!m_buffer_start)
+ SetBufferIO(size);
+ else {
+ size_t delta = m_buffer_pos-m_buffer_start;
+
+ m_buffer_start = (char *)realloc(m_buffer_start, m_buffer_size+size);
+ m_buffer_pos = m_buffer_start + delta;
+ // I round a bit
+ m_buffer_size += size;
+ m_buffer_end = m_buffer_start+m_buffer_size;
+ }
+ s_toput = size;
+ }
+ if (s_toput > size)
+ s_toput = size;
+ memcpy(m_buffer_pos, buffer, s_toput);
+ m_buffer_pos += s_toput;
+}
+
+void wxStreamBuffer::PutChar(char c)
+{
+ wxASSERT(m_stream != NULL);
if (!m_buffer_size) {
- m_istream->m_lastread = m_istream->DoRead(buffer, size);
+ m_stream->OnSysWrite(&c, 1);
return;
}
+ if (GetDataLeft() == 0 && !FlushBuffer()) {
+ CHECK_ERROR(wxStream_WRITE_ERR);
+ return;
+ }
+
+ PutToBuffer(&c, 1);
+ m_stream->m_lastcount = 1;
+}
+
+char wxStreamBuffer::Peek()
+{
+ char c;
+
+ wxASSERT(m_stream != NULL && m_buffer_size != 0);
+
+ if (!GetDataLeft()) {
+ CHECK_ERROR(wxStream_READ_ERR);
+ return 0;
+ }
+
+ GetFromBuffer(&c, 1);
+ m_buffer_pos--;
+
+ return c;
+}
+
+char wxStreamBuffer::GetChar()
+{
+ char c;
+
+ wxASSERT(m_stream != NULL);
+
+ if (!m_buffer_size) {
+ m_stream->OnSysRead(&c, 1);
+ return c;
+ }
+
+ if (!GetDataLeft()) {
+ CHECK_ERROR(wxStream_READ_ERR);
+ return 0;
+ }
+
+ GetFromBuffer(&c, 1);
+
+ m_stream->m_lastcount = 1;
+ return c;
+}
+
+size_t wxStreamBuffer::Read(void *buffer, size_t size)
+{
+ wxASSERT(m_stream != NULL);
+
+ if (m_mode == write)
+ return 0;
+
+ // ------------------
+ // Buffering disabled
+ // ------------------
+
+ m_stream->m_lasterror = wxStream_NOERROR;
+ if (!m_buffer_size)
+ return (m_stream->m_lastcount += m_stream->OnSysRead(buffer, size));
+
// -----------------
// Buffering enabled
// -----------------
size_t buf_left, orig_size = size;
- size_t read_ret;
while (size > 0) {
- buf_left = m_buffer_end - m_buffer_pos;
+ buf_left = GetDataLeft();
// First case: the requested buffer is larger than the stream buffer,
- // we split
+ // we split it.
if (size > buf_left) {
- memcpy(buffer, m_buffer_pos, buf_left);
- size -= buf_left;
+ GetFromBuffer(buffer, buf_left);
+ size -= buf_left;
buffer = (char *)buffer + buf_left; // ANSI C++ violation.
- read_ret = m_istream->DoRead(m_buffer_start, m_buffer_size);
-
- // Read failed
- if (read_ret == 0) {
- m_istream->m_lastread = orig_size-size;
- m_buffer_pos = m_buffer_end = m_buffer_start;
- return;
- } else {
- m_buffer_end = m_buffer_start+read_ret;
- m_buffer_pos = m_buffer_start;
+ if (!FillBuffer()) {
+ CHECK_ERROR(wxStream_EOF);
+ return (m_stream->m_lastcount = orig_size-size);
}
} else {
// Second case: we just copy from the stream buffer.
- memcpy(buffer, m_buffer_pos, size);
- m_buffer_pos += size;
+ GetFromBuffer(buffer, size);
break;
}
}
- m_istream->m_lastread = orig_size;
+ return (m_stream->m_lastcount += orig_size);
+}
+
+size_t wxStreamBuffer::Read(wxStreamBuffer *s_buf)
+{
+ char buf[BUF_TEMP_SIZE];
+ size_t s = 0, bytes_read = BUF_TEMP_SIZE;
+
+ if (m_mode == write)
+ return 0;
+
+ while (bytes_read != 0) {
+ bytes_read = Read(buf, bytes_read);
+ bytes_read = s_buf->Write(buf, bytes_read);
+ s += bytes_read;
+ }
+ return s;
}
-void wxStreamBuffer::Write(const void *buffer, size_t size)
+size_t wxStreamBuffer::Write(const void *buffer, size_t size)
{
- wxASSERT(m_ostream != NULL);
+ wxASSERT(m_stream != NULL);
+
+ if (m_mode == read)
+ return 0;
// ------------------
// Buffering disabled
// ------------------
- if (!m_buffer_size) {
- m_ostream->m_lastwrite = m_ostream->DoWrite(buffer, size);
- return;
- }
+ m_stream->m_lasterror = wxStream_NOERROR;
+ if (!m_buffer_size && m_fixed)
+ return (m_stream->m_lastcount = m_stream->OnSysWrite(buffer, size));
// ------------------
// Buffering enabled
// ------------------
size_t buf_left, orig_size = size;
- size_t write_ret;
while (size > 0) {
buf_left = m_buffer_end - m_buffer_pos;
// First case: the buffer to write is larger than the stream buffer,
// we split it
- if (size > buf_left) {
- memcpy(m_buffer_pos, buffer, buf_left);
+ // NB: If stream buffer isn't fixed (as for wxMemoryOutputStream),
+ // we always go to the second case.
+ if (size > buf_left && m_fixed) {
+ PutToBuffer(buffer, buf_left);
size -= buf_left;
buffer = (char *)buffer + buf_left; // ANSI C++ violation.
- write_ret = m_ostream->DoWrite(m_buffer_start, m_buffer_size);
- if (write_ret != m_buffer_size) {
- m_ostream->m_bad = TRUE;
- m_ostream->m_lastwrite = orig_size-size;
- m_buffer_pos = m_buffer_end = m_buffer_start;
- return;
+ if (!FlushBuffer()) {
+ CHECK_ERROR(wxStream_WRITE_ERR);
+ return (m_stream->m_lastcount = orig_size-size);
}
+
m_buffer_pos = m_buffer_start;
} else {
// Second case: just copy it in the stream buffer.
-
- memcpy(m_buffer_pos, buffer, size);
- m_buffer_pos += size;
+ PutToBuffer(buffer, size);
break;
}
}
- m_ostream->m_lastwrite = orig_size;
+ return (m_stream->m_lastcount = orig_size);
}
-// ----------------------------------------------------------------------------
-// wxInputStream
-// ----------------------------------------------------------------------------
-
-wxInputStream::wxInputStream()
+size_t wxStreamBuffer::Write(wxStreamBuffer *sbuf)
{
- m_i_destroybuf = TRUE;
- m_i_streambuf = new wxStreamBuffer(*this);
- m_eof = FALSE;
+ char buf[BUF_TEMP_SIZE];
+ size_t s = 0, bytes_count = BUF_TEMP_SIZE, b_count2;
+ wxInputStream *in_stream;
+
+ if (m_mode == read)
+ return 0;
+
+ in_stream = (wxInputStream *)sbuf->Stream();
+
+ while (bytes_count == BUF_TEMP_SIZE) {
+ b_count2 = sbuf->Read(buf, bytes_count);
+ bytes_count = Write(buf, b_count2);
+ if (b_count2 > bytes_count)
+ in_stream->Ungetch(buf+bytes_count, b_count2-bytes_count);
+ s += bytes_count;
+ }
+ return s;
}
-wxInputStream::wxInputStream(wxStreamBuffer *buffer)
+off_t wxStreamBuffer::Seek(off_t pos, wxSeekMode mode)
{
- m_i_destroybuf = FALSE;
- m_i_streambuf = buffer;
- m_eof = FALSE;
+ off_t ret_off, diff, last_access;
+
+ last_access = GetLastAccess();
+
+ if (!m_flushable) {
+ switch (mode) {
+ case wxFromStart: diff = pos; break;
+ case wxFromCurrent: diff = pos + GetIntPosition(); break;
+ case wxFromEnd: diff = pos + last_access; break;
+ default: return wxInvalidOffset;
+ }
+ if (diff < 0 || diff > last_access)
+ return wxInvalidOffset;
+ SetIntPosition(diff);
+ return diff;
+ }
+
+ switch (mode) {
+ case wxFromStart: {
+ // We'll try to compute an internal position later ...
+ ret_off = m_stream->OnSysSeek(pos, wxFromStart);
+ ResetBuffer();
+ return ret_off;
+ }
+ case wxFromCurrent: {
+ diff = pos + GetIntPosition();
+
+ if ( (diff > last_access) || (diff < 0) ) {
+ // We must take into account the fact that we have read something
+ // previously.
+ ret_off = m_stream->OnSysSeek(diff-last_access, wxFromCurrent);
+ ResetBuffer();
+ return ret_off;
+ } else {
+ SetIntPosition(diff);
+ return pos;
+ }
+ }
+ case wxFromEnd:
+ // Hard to compute: always seek to the requested position.
+ ret_off = m_stream->OnSysSeek(pos, wxFromEnd);
+ ResetBuffer();
+ return ret_off;
+ }
+ return wxInvalidOffset;
}
-wxInputStream::~wxInputStream()
+off_t wxStreamBuffer::Tell() const
{
- if (m_i_destroybuf)
- delete m_i_streambuf;
+ off_t pos = m_stream->OnSysTell();
+ if (pos == wxInvalidOffset)
+ return wxInvalidOffset;
+
+ pos += GetIntPosition();
+
+ if (m_mode == read && m_flushable)
+ pos -= GetLastAccess();
+
+ return pos;
}
-char wxInputStream::GetC()
+size_t wxStreamBuffer::GetDataLeft()
{
- char c;
- m_i_streambuf->Read(&c, 1);
- return c;
+ /* Why is this done? RR. */
+ if (m_buffer_end == m_buffer_pos && m_flushable)
+ FillBuffer();
+
+ return m_buffer_end-m_buffer_pos;
}
-wxInputStream& wxInputStream::Read(void *buffer, size_t size)
+// ----------------------------------------------------------------------------
+// wxStreamBase
+// ----------------------------------------------------------------------------
+
+wxStreamBase::wxStreamBase()
{
- m_i_streambuf->Read(buffer, size);
- // wxStreamBuffer sets all variables for us
- return *this;
+ m_lasterror = wxStream_NOERROR;
+ m_lastcount = 0;
}
-#define BUF_TEMP_SIZE 10000
+wxStreamBase::~wxStreamBase()
+{
+}
-wxInputStream& wxInputStream::Read(wxOutputStream& stream_out)
+size_t wxStreamBase::OnSysRead(void *WXUNUSED(buffer), size_t WXUNUSED(size))
{
- char buf[BUF_TEMP_SIZE];
- size_t bytes_read = BUF_TEMP_SIZE;
+ return 0;
+}
- while (bytes_read == BUF_TEMP_SIZE && !stream_out.Bad()) {
- bytes_read = Read(buf, bytes_read).LastRead();
+size_t wxStreamBase::OnSysWrite(const void *WXUNUSED(buffer), size_t WXUNUSED(bufsize))
+{
+ return 0;
+}
- stream_out.Write(buf, bytes_read);
- }
- return *this;
+off_t wxStreamBase::OnSysSeek(off_t WXUNUSED(seek), wxSeekMode WXUNUSED(mode))
+{
+ return wxInvalidOffset;
}
-wxInputStream& wxInputStream::operator>>(wxString& line)
+off_t wxStreamBase::OnSysTell() const
{
- wxDataInputStream s(*this);
+ return wxInvalidOffset;
+}
- line = s.ReadLine();
- return *this;
+// ----------------------------------------------------------------------------
+// wxInputStream
+// ----------------------------------------------------------------------------
+
+wxInputStream::wxInputStream()
+ : wxStreamBase(),
+ m_wback(NULL), m_wbacksize(0), m_wbackcur(0)
+{
}
-wxInputStream& wxInputStream::operator>>(char& c)
+wxInputStream::~wxInputStream()
{
- c = GetC();
- return *this;
+ if (m_wback)
+ free(m_wback);
}
-wxInputStream& wxInputStream::operator>>(short& i)
+bool wxInputStream::Eof() const
{
- long l;
+ wxInputStream *self = (wxInputStream *)this; // const_cast
+
+ char c;
+ self->Read(&c, 1);
+ if ( GetLastError() == wxSTREAM_EOF )
+ {
+ return TRUE;
+ }
- *this >> l;
- i = (short)l;
- return *this;
+ self->Ungetch(c);
+
+ return FALSE;
}
-wxInputStream& wxInputStream::operator>>(int& i)
+char *wxInputStream::AllocSpaceWBack(size_t needed_size)
{
- long l;
+ /* get number of bytes left from previous wback buffer */
+ size_t toget = m_wbacksize - m_wbackcur;
+
+ /* allocate a buffer large enough to hold prev + new data */
+ char *temp_b = (char *) malloc(needed_size + toget);
+
+ if (!temp_b)
+ return NULL;
+
+ /* copy previous data (and free old buffer) if needed */
+ if (m_wback)
+ {
+ memmove(temp_b + needed_size, m_wback + m_wbackcur, toget);
+ free(m_wback);
+ }
- *this >> l;
- i = (short)l;
- return *this;
+ /* done */
+ m_wback = temp_b;
+ m_wbackcur = 0;
+ m_wbacksize = needed_size + toget;
+
+ return (char *) m_wback;
}
-wxInputStream& wxInputStream::operator>>(long& i)
+size_t wxInputStream::GetWBack(char *buf, size_t bsize)
{
- /* I only implemented a simple integer parser */
- int c, sign;
+ size_t s_toget = m_wbacksize-m_wbackcur;
- while (isspace( c = GetC() ) )
- /* Do nothing */ ;
+ if (!m_wback)
+ return 0;
- i = 0;
- if (! (c == '-' || isdigit(c)) ) {
- InputStreamBuffer()->WriteBack(c);
- return *this;
- }
+ if (bsize < s_toget)
+ s_toget = bsize;
- if (c == '-') {
- sign = -1;
- c = GetC();
- } else
- sign = 1;
-
- while (isdigit(c)) {
- i = i*10 + c;
- c = GetC();
- }
+ memcpy(buf, (m_wback+m_wbackcur), s_toget);
- i *= sign;
+ m_wbackcur += s_toget;
+ if (m_wbackcur == m_wbacksize)
+ {
+ free(m_wback);
+ m_wback = (char *)NULL;
+ m_wbacksize = 0;
+ m_wbackcur = 0;
+ }
- return *this;
+ return s_toget;
}
-wxInputStream& wxInputStream::operator>>(float& f)
+size_t wxInputStream::Ungetch(const void *buf, size_t bufsize)
{
- /* I only implemented a simple float parser */
- int c, sign;
+ char *ptrback = AllocSpaceWBack(bufsize);
+ if (!ptrback)
+ return 0;
- while (isspace( c = GetC() ) )
- /* Do nothing */ ;
+ memcpy(ptrback, buf, bufsize);
+ return bufsize;
+}
- f = 0.0;
- if (! (c == '-' || isdigit(c)) ) {
- InputStreamBuffer()->WriteBack(c);
- return *this;
- }
+bool wxInputStream::Ungetch(char c)
+{
+ char * ptrback = AllocSpaceWBack(1);
+ if (!ptrback)
+ return FALSE;
- if (c == '-') {
- sign = -1;
- c = GetC();
- } else
- sign = 1;
+ *ptrback = c;
+ return TRUE;
+}
- while (isdigit(c)) {
- f = f*10 + c;
- c = GetC();
- }
+char wxInputStream::GetC()
+{
+ char c;
+ Read(&c, 1);
+ return c;
+}
- if (c == '.') {
- float f_multiplicator = 0.1;
- c = GetC();
+wxInputStream& wxInputStream::Read(void *buffer, size_t size)
+{
+ char *buf = (char *)buffer;
- while (isdigit(c)) {
- f += c*f_multiplicator;
- f_multiplicator /= 10;
- c = GetC();
+ size_t retsize = GetWBack(buf, size);
+ if (retsize == size)
+ {
+ m_lastcount = size;
+ m_lasterror = wxStream_NOERROR;
+ return *this;
}
- }
+ size -= retsize;
+ buf += retsize;
- f *= sign;
-
- return *this;
+ m_lastcount = OnSysRead(buf, size) + retsize;
+ return *this;
}
-wxInputStream& wxInputStream::operator>>(wxObject *& obj)
+char wxInputStream::Peek()
{
- wxObjectInputStream obj_s(*this);
- obj = obj_s.LoadObject();
- return *this;
+ char c;
+ Read(&c, 1);
+ if (m_lasterror == wxStream_NOERROR)
+ {
+ Ungetch(c);
+ return c;
+ }
+
+ return 0;
}
-off_t wxInputStream::SeekI(off_t pos, wxSeekMode mode)
+wxInputStream& wxInputStream::Read(wxOutputStream& stream_out)
{
- off_t ret_off;
+ char buf[BUF_TEMP_SIZE];
+ size_t bytes_read = BUF_TEMP_SIZE;
- switch (mode) {
- case wxFromStart:
- if ( (unsigned)abs (DoTellInput()-pos) > m_i_streambuf->GetLastAccess() ) {
- ret_off = DoSeekInput(pos, wxFromStart);
- m_i_streambuf->ResetBuffer();
- return ret_off;
- } else {
- m_i_streambuf->SetIntPosition(DoTellInput() - pos);
- return pos;
+ while (bytes_read == BUF_TEMP_SIZE)
+ {
+ bytes_read = Read(buf, bytes_read).LastRead();
+ bytes_read = stream_out.Write(buf, bytes_read).LastWrite();
}
- case wxFromCurrent:
- if ( ((unsigned)pos > m_i_streambuf->GetLastAccess()) || (pos < 0) ) {
- ret_off = DoSeekInput(pos, wxFromCurrent);
- m_i_streambuf->ResetBuffer();
- return ret_off;
- } else {
- m_i_streambuf->SetIntPosition(pos);
- return pos;
+ return *this;
+}
+
+off_t wxInputStream::SeekI(off_t pos, wxSeekMode mode)
+{
+ /* Should be check and improve, just to remove a slight bug !
+ I don't know whether it should be put as well in wxFileInputStream::OnSysSeek ? */
+ if (m_lasterror==wxSTREAM_EOF)
+ m_lasterror=wxSTREAM_NOERROR;
+
+ /* A call to SeekI() will automatically invalidate any previous call
+ to Ungetch(), otherwise it would be possible to SeekI() to one
+ one position, unread some bytes there, SeekI() to another position
+ and the data would be corrupted.
+
+ GRG: Could add code here to try to navigate within the wback
+ buffer if possible, but is it really needed? It would only work
+ when seeking in wxFromCurrent mode, else it would invalidate
+ anyway...
+ */
+ if (m_wback)
+ {
+ free(m_wback);
+ m_wback = (char*) NULL;
+ m_wbacksize = 0;
+ m_wbackcur = 0;
}
- case wxFromEnd:
- // Hard to compute: always seek to the requested position.
- ret_off = DoSeekInput(pos, wxFromEnd);
- m_i_streambuf->ResetBuffer();
- return ret_off;
- }
- return wxInvalidOffset;
+
+ return OnSysSeek(pos, mode);
}
off_t wxInputStream::TellI() const
{
- return DoTellInput() - m_i_streambuf->GetLastAccess() +
- m_i_streambuf->GetIntPosition();
+ /* GRG: Changed to make it compatible with the wback buffer */
+ off_t pos = OnSysTell();
+
+ if (pos != wxInvalidOffset)
+ pos -= (m_wbacksize - m_wbackcur);
+
+ return pos;
+}
+
+// --------------------
+// Overloaded operators
+// --------------------
+
+#if wxUSE_SERIAL
+wxInputStream& wxInputStream::operator>>(wxObject *& obj)
+{
+ wxObjectInputStream obj_s(*this);
+ obj = obj_s.LoadObject();
+ return *this;
}
+#endif
+
// ----------------------------------------------------------------------------
// wxOutputStream
// ----------------------------------------------------------------------------
wxOutputStream::wxOutputStream()
+ : wxStreamBase()
{
- m_o_destroybuf = TRUE;
- m_o_streambuf = new wxStreamBuffer(*this);
}
-wxOutputStream::wxOutputStream(wxStreamBuffer *buffer)
+wxOutputStream::~wxOutputStream()
{
- m_o_destroybuf = FALSE;
- m_o_streambuf = buffer;
}
-wxOutputStream::~wxOutputStream()
+void wxOutputStream::PutC(char c)
{
- if (m_o_destroybuf)
- delete m_o_streambuf;
+ Write((void *) &c, 1);
}
wxOutputStream& wxOutputStream::Write(const void *buffer, size_t size)
{
- m_o_streambuf->Write(buffer, size);
- return *this;
+ m_lastcount = OnSysWrite(buffer, size);
+ return *this;
}
wxOutputStream& wxOutputStream::Write(wxInputStream& stream_in)
{
- stream_in.Read(*this);
- return *this;
+ stream_in.Read(*this);
+ return *this;
}
-off_t wxOutputStream::SeekO(off_t pos, wxSeekMode mode)
+off_t wxOutputStream::TellO() const
{
- off_t ret_off;
-
- switch (mode) {
- case wxFromStart:
- if ( (unsigned)abs (DoTellOutput()-pos) > m_o_streambuf->GetLastAccess() ) {
- ret_off = DoSeekOutput(pos, wxFromStart);
- m_o_streambuf->ResetBuffer();
- return ret_off;
- } else {
- m_o_streambuf->SetIntPosition( DoTellOutput() - pos);
- return pos;
- }
- case wxFromCurrent:
- if ( ((unsigned)pos > m_o_streambuf->GetLastAccess()) || (pos < 0) ) {
- ret_off = DoSeekOutput(pos, wxFromCurrent);
- m_o_streambuf->ResetBuffer();
- return ret_off;
- } else {
- m_o_streambuf->SetIntPosition(pos);
- return pos;
- }
- case wxFromEnd:
- // Hard to compute: always seek to the requested position.
- ret_off = DoSeekOutput(pos, wxFromEnd);
- m_o_streambuf->ResetBuffer();
- return ret_off;
- }
- return wxInvalidOffset;
+ return OnSysTell();
}
-off_t wxOutputStream::TellO() const
+off_t wxOutputStream::SeekO(off_t pos, wxSeekMode mode)
{
- return DoTellOutput() - m_o_streambuf->GetLastAccess()
- + m_o_streambuf->GetIntPosition();
+ return OnSysSeek(pos, mode);
}
void wxOutputStream::Sync()
{
- DoWrite(m_o_streambuf->GetBufferStart(), m_o_streambuf->GetIntPosition());
+}
- m_o_streambuf->ResetBuffer();
+#if wxUSE_SERIAL
+wxOutputStream& wxOutputStream::operator<<(wxObject& obj)
+{
+ wxObjectOutputStream obj_s(*this);
+ obj_s.SaveObject(obj);
+ return *this;
}
+#endif
+
+// ----------------------------------------------------------------------------
+// wxCountingOutputStream
+// ----------------------------------------------------------------------------
-wxOutputStream& wxOutputStream::operator<<(const char *string)
+wxCountingOutputStream::wxCountingOutputStream ()
+ : wxOutputStream()
{
- return Write(string, strlen(string));
+ m_currentPos = 0;
}
-wxOutputStream& wxOutputStream::operator<<(wxString& string)
+size_t wxCountingOutputStream::GetSize() const
{
- return Write(string, string.Len());
+ return m_lastcount;
}
-wxOutputStream& wxOutputStream::operator<<(char c)
+size_t wxCountingOutputStream::OnSysWrite(const void *WXUNUSED(buffer), size_t size)
{
- return Write(&c, 1);
+ m_currentPos += size;
+ if (m_currentPos > m_lastcount) m_lastcount = m_currentPos;
+ return m_currentPos;
}
-wxOutputStream& wxOutputStream::operator<<(short i)
+off_t wxCountingOutputStream::OnSysSeek(off_t pos, wxSeekMode mode)
{
- wxString strint;
+ if (mode == wxFromStart)
+ m_currentPos = pos;
+ if (mode == wxFromEnd)
+ m_currentPos = m_lastcount + pos;
+ else
+ m_currentPos += pos;
+
+ if (m_currentPos > m_lastcount) m_lastcount = m_currentPos;
- strint.Printf("%i", i);
- return Write(strint, strint.Len());
+ return m_currentPos;
}
-wxOutputStream& wxOutputStream::operator<<(int i)
+off_t wxCountingOutputStream::OnSysTell() const
{
- wxString strint;
+ return m_currentPos;
+}
+
+// ----------------------------------------------------------------------------
+// wxFilterInputStream
+// ----------------------------------------------------------------------------
- strint.Printf("%i", i);
- return Write(strint, strint.Len());
+wxFilterInputStream::wxFilterInputStream()
+ : wxInputStream()
+{
}
-wxOutputStream& wxOutputStream::operator<<(long i)
+wxFilterInputStream::wxFilterInputStream(wxInputStream& stream)
+ : wxInputStream()
{
- wxString strlong;
+ m_parent_i_stream = &stream;
+}
- strlong.Printf("%i", i);
- return Write((const char *)strlong, strlong.Len());
+wxFilterInputStream::~wxFilterInputStream()
+{
}
-wxOutputStream& wxOutputStream::operator<<(double f)
+// ----------------------------------------------------------------------------
+// wxFilterOutputStream
+// ----------------------------------------------------------------------------
+wxFilterOutputStream::wxFilterOutputStream()
+ : wxOutputStream()
{
- wxString strfloat;
+}
- strfloat.Printf("%f", f);
- return Write(strfloat, strfloat.Len());
+wxFilterOutputStream::wxFilterOutputStream(wxOutputStream& stream)
+ : wxOutputStream()
+{
+ m_parent_o_stream = &stream;
}
-wxOutputStream& wxOutputStream::operator<<(wxObject& obj)
+wxFilterOutputStream::~wxFilterOutputStream()
{
- wxObjectOutputStream obj_s(*this);
- obj_s.SaveObject(obj);
- return *this;
}
// ----------------------------------------------------------------------------
-// wxFilterInputStream
+// wxBufferedInputStream
// ----------------------------------------------------------------------------
-wxFilterInputStream::wxFilterInputStream(wxInputStream& stream)
- : wxInputStream(NULL)
+wxBufferedInputStream::wxBufferedInputStream(wxInputStream& s)
+ : wxFilterInputStream(s)
{
- m_parent_i_stream = &stream;
- m_i_streambuf = stream.InputStreamBuffer();
+ m_i_streambuf = new wxStreamBuffer(*this, wxStreamBuffer::read);
+ m_i_streambuf->SetBufferIO(1024);
}
-wxFilterInputStream::~wxFilterInputStream()
+wxBufferedInputStream::~wxBufferedInputStream()
+{
+ off_t unused_bytes=m_i_streambuf->GetBufferPos()-m_i_streambuf->GetBufferEnd();
+ m_parent_i_stream->SeekI(unused_bytes,wxFromCurrent);
+
+ delete m_i_streambuf;
+}
+
+char wxBufferedInputStream::Peek()
{
+ return m_i_streambuf->Peek();
}
-size_t wxFilterInputStream::DoRead(void *buffer, size_t size)
+wxInputStream& wxBufferedInputStream::Read(void *buffer, size_t size)
{
- return m_parent_i_stream->Read(buffer, size).LastRead();
+ size_t retsize;
+ char *buf = (char *)buffer;
+
+ retsize = GetWBack(buf, size);
+ m_lastcount = retsize;
+ if (retsize == size)
+ {
+ m_lasterror = wxStream_NOERROR;
+ return *this;
+ }
+ size -= retsize;
+ buf += retsize;
+
+ m_i_streambuf->Read(buf, size);
+
+ return *this;
+}
+
+off_t wxBufferedInputStream::SeekI(off_t pos, wxSeekMode mode)
+{
+ return m_i_streambuf->Seek(pos, mode);
+}
+
+off_t wxBufferedInputStream::TellI() const
+{
+ return m_i_streambuf->Tell();
}
-off_t wxFilterInputStream::DoSeekInput(off_t pos, wxSeekMode mode)
+size_t wxBufferedInputStream::OnSysRead(void *buffer, size_t bufsize)
{
- return m_parent_i_stream->SeekI(pos, mode);
+ return m_parent_i_stream->Read(buffer, bufsize).LastRead();
}
-off_t wxFilterInputStream::DoTellInput() const
+off_t wxBufferedInputStream::OnSysSeek(off_t seek, wxSeekMode mode)
{
- return m_parent_i_stream->TellI();
+ return m_parent_i_stream->SeekI(seek, mode);
+}
+
+off_t wxBufferedInputStream::OnSysTell() const
+{
+ return m_parent_i_stream->TellI();
}
// ----------------------------------------------------------------------------
-// wxFilterOutputStream
+// wxBufferedOutputStream
// ----------------------------------------------------------------------------
-wxFilterOutputStream::wxFilterOutputStream(wxOutputStream& stream)
- : wxOutputStream(NULL)
+
+wxBufferedOutputStream::wxBufferedOutputStream(wxOutputStream& s)
+ : wxFilterOutputStream(s)
{
- m_parent_o_stream = &stream;
- m_o_streambuf = stream.OutputStreamBuffer();
+ m_o_streambuf = new wxStreamBuffer(*this, wxStreamBuffer::write);
+ m_o_streambuf->SetBufferIO(1024);
}
-wxFilterOutputStream::~wxFilterOutputStream()
+wxBufferedOutputStream::~wxBufferedOutputStream()
{
+ Sync();
+ delete m_o_streambuf;
}
-size_t wxFilterOutputStream::DoWrite(const void *buffer, size_t size)
+wxOutputStream& wxBufferedOutputStream::Write(const void *buffer, size_t size)
{
- return m_parent_o_stream->Write(buffer, size).LastWrite();
+ m_lastcount = 0;
+ m_o_streambuf->Write(buffer, size);
+ return *this;
}
-off_t wxFilterOutputStream::DoSeekOutput(off_t pos, wxSeekMode mode)
+off_t wxBufferedOutputStream::SeekO(off_t pos, wxSeekMode mode)
{
- return m_parent_o_stream->SeekO(pos, mode);
+ Sync();
+ return m_o_streambuf->Seek(pos, mode);
}
-off_t wxFilterOutputStream::DoTellOutput() const
+off_t wxBufferedOutputStream::TellO() const
{
- return m_parent_o_stream->TellO();
+ return m_o_streambuf->Tell();
+}
+
+void wxBufferedOutputStream::Sync()
+{
+ m_o_streambuf->FlushBuffer();
+ m_parent_o_stream->Sync();
+}
+
+size_t wxBufferedOutputStream::OnSysWrite(const void *buffer, size_t bufsize)
+{
+ return m_parent_o_stream->Write(buffer, bufsize).LastWrite();
+}
+
+off_t wxBufferedOutputStream::OnSysSeek(off_t seek, wxSeekMode mode)
+{
+ return m_parent_o_stream->SeekO(seek, mode);
+}
+
+off_t wxBufferedOutputStream::OnSysTell() const
+{
+ return m_parent_o_stream->TellO();
+}
+
+size_t wxBufferedOutputStream::GetSize() const
+{
+ return m_parent_o_stream->GetSize() + m_o_streambuf->GetIntPosition();
}
// ----------------------------------------------------------------------------
{
#ifdef __MSW__
return stream.Write("\r\n", 2);
+#else
+#ifdef __WXMAC__
+ return stream.Write("\r", 1);
#else
return stream.Write("\n", 1);
#endif
+#endif
}
+
+#endif
+ // wxUSE_STREAMS
projects / wxWidgets.git / blobdiff