// wxStreamBuffer
// ----------------------------------------------------------------------------
-wxStreamBuffer::wxStreamBuffer(wxInputStream& i_stream)
+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_stream(&stream), m_mode(mode)
{
}
-wxStreamBuffer::wxStreamBuffer(wxOutputStream& o_stream)
- : m_buffer_start(NULL), m_buffer_end(NULL), m_buffer_pos(NULL),
- m_buffer_size(0), m_istream(NULL), m_ostream(&o_stream)
+wxStreamBuffer::~wxStreamBuffer()
{
+ wxDELETEA(m_buffer_start);
}
-wxStreamBuffer::~wxStreamBuffer()
+bool wxStreamBuffer::WriteBack(const char *buf, size_t bufsize)
{
- wxDELETEA(m_buffer_start);
+ char *ptrback;
+
+ ptrback = AllocSpaceWBack(bufsize);
+ if (!ptrback)
+ return FALSE;
+
+ memcpy(ptrback, buf, bufsize);
+ return TRUE;
}
-void wxStreamBuffer::WriteBack(char c)
+bool wxStreamBuffer::WriteBack(char c)
{
- if (m_ostream)
- return;
+ char *ptrback;
- // Assume that if we write "back" we have read a few bytes: so we have some
- // space.
- if (m_buffer_pos == m_buffer_start)
- return;
+ ptrback = AllocSpaceWBack(1);
+ if (!ptrback)
+ return FALSE;
- m_buffer_pos--;
- *m_buffer_pos = c;
+ *ptrback = c;
+ return TRUE;
}
void wxStreamBuffer::SetBufferIO(char *buffer_start, char *buffer_end)
{
- size_t ret;
-
m_buffer_start = buffer_start;
m_buffer_end = buffer_end;
m_buffer_size = m_buffer_end-m_buffer_start;
-
- if (m_istream) {
- ret = m_istream->DoRead(m_buffer_start, m_buffer_size);
- m_buffer_end = m_buffer_start + ret;
- }
- m_buffer_pos = m_buffer_start;
+ ResetBuffer();
}
void wxStreamBuffer::SetBufferIO(size_t bufsize)
void wxStreamBuffer::ResetBuffer()
{
- if (m_istream)
+ if (m_mode == read)
m_buffer_pos = m_buffer_end;
else
m_buffer_pos = m_buffer_start;
}
+char *wxStreamBuffer::AllocSpaceWBack(size_t needed_size)
+{
+ char *temp_b;
+
+ m_wbacksize += needed_size;
+
+ if (!m_wback)
+ temp_b = (char *)malloc(m_wbacksize);
+ else
+ temp_b = (char *)realloc(m_wback, m_wbacksize);
+
+ if (!temp_b)
+ return NULL;
+ return (char *)((size_t)m_wback+(m_wbacksize-needed_size));
+}
+
+size_t wxStreamBuffer::GetWBack(char *buf, size_t bsize)
+{
+ size_t s_toget = m_wbacksize-m_wbackcur;
+
+ if (bsize < s_toget)
+ s_toget = bsize;
+
+ memcpy(buf, (m_wback+m_wbackcur), s_toget);
+
+ m_wbackcur += s_toget;
+ if (m_wbackcur == m_wbacksize) {
+ free(m_wback);
+ m_wback = (char *)NULL;
+ m_wbacksize = 0;
+ m_wbackcur = 0;
+ }
+
+ return s_toget;
+}
+
+bool wxStreamBuffer::FillBuffer()
+{
+ size_t count;
+
+ 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)
+ 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) {
+ m_buffer_start = (char *)realloc(m_buffer_start, m_buffer_size+size);
+ // I round a bit
+ 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::Read(void *buffer, size_t size)
{
- wxASSERT(m_istream != NULL);
+ wxASSERT(m_stream != NULL);
// ------------------
// Buffering disabled
// ------------------
+ m_stream->m_lastcount = GetWBack((char *)buffer, size);
+ size -= m_stream->m_lastcount;
+ if (size == 0)
+ return;
+
+ buffer = (void *)((char *)buffer+m_stream->m_lastcount);
+
if (!m_buffer_size) {
- m_istream->m_lastread = m_istream->DoRead(buffer, size);
+ m_stream->m_lastcount += m_stream->OnSysRead(buffer, size);
return;
}
// 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
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: EOF
- if (read_ret == 0) {
- m_istream->m_lastread = orig_size-size;
- m_istream->m_eof = TRUE;
- m_buffer_pos = m_buffer_end = m_buffer_start;
+ if (!FillBuffer()) {
+ m_stream->m_lastcount = orig_size-size;
return;
- } else {
- m_buffer_end = m_buffer_start+read_ret;
- m_buffer_pos = m_buffer_start;
}
} 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;
+ m_stream->m_lastcount += orig_size;
}
void wxStreamBuffer::Write(const void *buffer, size_t size)
{
- wxASSERT(m_ostream != NULL);
+ wxASSERT(m_stream != NULL);
// ------------------
// Buffering disabled
// ------------------
if (!m_buffer_size) {
- m_ostream->m_lastwrite = m_ostream->DoWrite(buffer, size);
+ m_stream->m_lastcount = m_stream->OnSysWrite(buffer, size);
return;
}
// ------------------
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);
+ 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;
+ if (!FlushBuffer()) {
+ m_stream->m_lastcount = orig_size-size;
return;
}
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;
+ m_stream->m_lastcount = orig_size;
+}
+
+off_t wxStreamBuffer::Seek(off_t pos, wxSeekMode mode)
+{
+ off_t ret_off, diff, last_access;
+
+ last_access = GetLastAccess();
+
+ 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) ) {
+ ret_off = m_stream->OnSysSeek(pos, 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;
+}
+
+off_t wxStreamBuffer::Tell() const
+{
+ off_t pos;
+
+ pos = m_stream->OnSysTell();
+ if (pos == wxInvalidOffset)
+ return wxInvalidOffset;
+
+ return pos - GetLastAccess() + GetIntPosition();
+}
+
+size_t wxStreamBuffer::GetDataLeft() const
+{
+ return m_buffer_end-m_buffer_pos;
+}
+
+// ----------------------------------------------------------------------------
+// wxStreamBase
+// ----------------------------------------------------------------------------
+
+wxStreamBase::wxStreamBase()
+{
+ m_lasterror = wxStream_NOERROR;
+ m_lastcount = 0;
+}
+
+wxStreamBase::~wxStreamBase()
+{
+}
+
+size_t wxStreamBase::OnSysRead(void *buffer, size_t size)
+{
+ return 0;
+}
+
+size_t wxStreamBase::OnSysWrite(const void *buffer, size_t bufsize)
+{
+ return 0;
+}
+
+off_t wxStreamBase::OnSysSeek(off_t seek, wxSeekMode mode)
+{
+ return wxInvalidOffset;
+}
+
+off_t wxStreamBase::OnSysTell()
+{
+ return wxInvalidOffset;
}
// ----------------------------------------------------------------------------
// ----------------------------------------------------------------------------
wxInputStream::wxInputStream()
+ : wxStreamBase()
{
m_i_destroybuf = TRUE;
- m_i_streambuf = new wxStreamBuffer(*this);
- m_eof = FALSE;
- m_lastread = 0;
+ m_i_streambuf = new wxStreamBuffer(*this, wxStreamBuffer::read);
}
wxInputStream::wxInputStream(wxStreamBuffer *buffer)
+ : wxStreamBase()
{
m_i_destroybuf = FALSE;
m_i_streambuf = buffer;
- m_eof = FALSE;
- m_lastread = 0;
}
wxInputStream::~wxInputStream()
return *this;
}
+char wxInputStream::Peek()
+{
+ if (!m_i_streambuf->GetDataLeft())
+ m_i_streambuf->FillBuffer();
+
+ return *(m_i_streambuf->GetBufferPos());
+}
+
#define BUF_TEMP_SIZE 10000
wxInputStream& wxInputStream::Read(wxOutputStream& stream_out)
char buf[BUF_TEMP_SIZE];
size_t bytes_read = BUF_TEMP_SIZE;
- while (bytes_read == BUF_TEMP_SIZE && !stream_out.Bad()) {
+ while (bytes_read == BUF_TEMP_SIZE && stream_out.LastError() != wxStream_NOERROR) {
bytes_read = Read(buf, bytes_read).LastRead();
stream_out.Write(buf, bytes_read);
return *this;
}
+off_t wxInputStream::SeekI(off_t pos, wxSeekMode mode)
+{
+ return m_i_streambuf->Seek(pos, mode);
+}
+
+off_t wxInputStream::TellI() const
+{
+ return m_i_streambuf->Tell();
+}
+
+// --------------------
+// Overloaded operators
+// --------------------
+
wxInputStream& wxInputStream::operator>>(wxString& line)
{
wxDataInputStream s(*this);
return *this;
}
-wxInputStream& wxInputStream::operator>>(float& f)
+wxInputStream& wxInputStream::operator>>(double& f)
{
/* I only implemented a simple float parser */
int c, sign;
sign = 1;
while (isdigit(c)) {
- f = f*10 + c;
+ f = f*10 + (c - '0');
c = GetC();
}
if (c == '.') {
- float f_multiplicator = 0.1;
+ double f_multiplicator = (double) 0.1;
c = GetC();
while (isdigit(c)) {
- f += c*f_multiplicator;
+ f += (c-'0')*f_multiplicator;
f_multiplicator /= 10;
c = GetC();
}
return *this;
}
+#if wxUSE_SERIAL
wxInputStream& wxInputStream::operator>>(wxObject *& obj)
{
wxObjectInputStream obj_s(*this);
obj = obj_s.LoadObject();
return *this;
}
+#endif
-off_t wxInputStream::SeekI(off_t pos, wxSeekMode mode)
-{
- off_t ret_off, diff, last_access;
-
- last_access = m_i_streambuf->GetLastAccess();
-
- switch (mode) {
- case wxFromStart:
- diff = DoTellInput() - pos;
- if ( diff < 0 || diff > last_access ) {
- ret_off = DoSeekInput(pos, wxFromStart);
- m_i_streambuf->ResetBuffer();
- return ret_off;
- } else {
- m_i_streambuf->SetIntPosition(last_access - diff);
- return pos;
- }
- case wxFromCurrent:
- diff = pos + m_i_streambuf->GetIntPosition();
-
- if ( (diff > last_access) || (diff < 0) ) {
- ret_off = DoSeekInput(pos, wxFromCurrent);
- m_i_streambuf->ResetBuffer();
- return ret_off;
- } else {
- m_i_streambuf->SetIntPosition(diff);
- return pos;
- }
- 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;
-}
-
-off_t wxInputStream::TellI() const
-{
- return DoTellInput() - m_i_streambuf->GetLastAccess() +
- m_i_streambuf->GetIntPosition();
-}
// ----------------------------------------------------------------------------
// wxOutputStream
// ----------------------------------------------------------------------------
wxOutputStream::wxOutputStream()
+ : wxStreamBase()
{
m_o_destroybuf = TRUE;
- m_o_streambuf = new wxStreamBuffer(*this);
- m_bad = FALSE;
- m_lastwrite = 0;
+ m_o_streambuf = new wxStreamBuffer(*this, wxStreamBuffer::write);
}
wxOutputStream::wxOutputStream(wxStreamBuffer *buffer)
+ : wxStreamBase()
{
m_o_destroybuf = FALSE;
m_o_streambuf = buffer;
- m_bad = FALSE;
- m_lastwrite = 0;
}
wxOutputStream::~wxOutputStream()
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 m_o_streambuf->Tell();
}
-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 m_o_streambuf->Seek(pos, mode);
}
void wxOutputStream::Sync()
{
- DoWrite(m_o_streambuf->GetBufferStart(), m_o_streambuf->GetIntPosition());
-
- m_o_streambuf->ResetBuffer();
+ m_o_streambuf->FlushBuffer();
}
wxOutputStream& wxOutputStream::operator<<(const char *string)
return Write(strfloat, strfloat.Len());
}
+#if wxUSE_SERIAL
wxOutputStream& wxOutputStream::operator<<(wxObject& obj)
{
wxObjectOutputStream obj_s(*this);
obj_s.SaveObject(obj);
return *this;
}
+#endif
// ----------------------------------------------------------------------------
// wxFilterInputStream
// ----------------------------------------------------------------------------
-wxFilterInputStream::wxFilterInputStream(wxInputStream& stream)
+wxFilterInputStream::wxFilterInputStream()
: wxInputStream(NULL)
{
- m_parent_i_stream = &stream;
- m_i_streambuf = stream.InputStreamBuffer();
-}
-
-wxFilterInputStream::~wxFilterInputStream()
-{
-}
-
-size_t wxFilterInputStream::DoRead(void *buffer, size_t size)
-{
- return m_parent_i_stream->Read(buffer, size).LastRead();
+ // WARNING streambuf set to NULL !
}
-off_t wxFilterInputStream::DoSeekInput(off_t pos, wxSeekMode mode)
+wxFilterInputStream::wxFilterInputStream(wxInputStream& stream)
+ : wxInputStream(stream.InputStreamBuffer())
{
- return m_parent_i_stream->SeekI(pos, mode);
+ m_parent_i_stream = &stream;
}
-off_t wxFilterInputStream::DoTellInput() const
+wxFilterInputStream::~wxFilterInputStream()
{
- return m_parent_i_stream->TellI();
}
-
// ----------------------------------------------------------------------------
// wxFilterOutputStream
// ----------------------------------------------------------------------------
-wxFilterOutputStream::wxFilterOutputStream(wxOutputStream& stream)
+wxFilterOutputStream::wxFilterOutputStream()
: wxOutputStream(NULL)
-{
- m_parent_o_stream = &stream;
- m_o_streambuf = stream.OutputStreamBuffer();
-}
-
-wxFilterOutputStream::~wxFilterOutputStream()
{
}
-size_t wxFilterOutputStream::DoWrite(const void *buffer, size_t size)
-{
- return m_parent_o_stream->Write(buffer, size).LastWrite();
-}
-
-off_t wxFilterOutputStream::DoSeekOutput(off_t pos, wxSeekMode mode)
+wxFilterOutputStream::wxFilterOutputStream(wxOutputStream& stream)
+ : wxOutputStream(stream.OutputStreamBuffer())
{
- return m_parent_o_stream->SeekO(pos, mode);
+ m_parent_o_stream = &stream;
}
-off_t wxFilterOutputStream::DoTellOutput() const
+wxFilterOutputStream::~wxFilterOutputStream()
{
- return m_parent_o_stream->TellO();
}
// ----------------------------------------------------------------------------
projects / wxWidgets.git / blobdiff