// 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
#endif
-#if !USE_SHARED_LIBRARY
-IMPLEMENT_ABSTRACT_CLASS(wxInputStream, wxObject)
-IMPLEMENT_ABSTRACT_CLASS(wxOutputStream, wxObject)
-IMPLEMENT_CLASS(wxFilterInputStream, wxInputStream)
-IMPLEMENT_CLASS(wxFilterOutputStream, wxOutputStream)
-#endif
+// ----------------------------------------------------------------------------
+// wxStreamBuffer
+// ----------------------------------------------------------------------------
+
+wxStreamBuffer::wxStreamBuffer(wxInputStream& i_stream)
+ : m_buffer_start(NULL), m_buffer_end(NULL), m_buffer_pos(NULL),
+ m_buffer_size(0), m_istream(&i_stream), m_ostream(NULL)
+{
+}
+
+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()
+{
+}
+
+void wxStreamBuffer::WriteBack(char c)
+{
+ 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;
+}
+
+void wxStreamBuffer::SetBufferIO(char *buffer_start, char *buffer_end)
+{
+ m_buffer_pos = m_buffer_start = buffer_start;
+ m_buffer_end = buffer_end;
+
+ m_buffer_size = m_buffer_end-m_buffer_start;
+}
+
+void wxStreamBuffer::SetBufferIO(size_t bufsize)
+{
+ if (m_buffer_start)
+ delete[] m_buffer_start;
+
+ if (!bufsize) {
+ m_buffer_start = NULL;
+ m_buffer_end = NULL;
+ m_buffer_pos = NULL;
+ m_buffer_size = 0;
+ }
+
+ 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;
+}
+
+void wxStreamBuffer::ResetBuffer()
+{
+ if (m_istream)
+ m_buffer_pos = m_buffer_end;
+ else
+ m_buffer_pos = m_buffer_start;
+}
+
+void wxStreamBuffer::Read(void *buffer, size_t size)
+{
+ wxASSERT(m_istream != NULL);
+
+ // ------------------
+ // Buffering disabled
+ // ------------------
+
+ if (!m_buffer_size) {
+ m_istream->m_lastread = m_istream->DoRead(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;
+
+ // 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;
+ 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;
+ }
+ } else {
+
+ // Second case: we just copy from the stream buffer.
+ memcpy(buffer, m_buffer_pos, size);
+ m_buffer_pos += size;
+ break;
+ }
+ }
+ m_istream->m_lastread = orig_size;
+}
+
+void wxStreamBuffer::Write(const void *buffer, size_t size)
+{
+ wxASSERT(m_ostream != NULL);
+
+ // ------------------
+ // Buffering disabled
+ // ------------------
+
+ if (!m_buffer_size) {
+ m_ostream->m_lastwrite = m_ostream->DoWrite(buffer, size);
+ return;
+ }
+
+ // ------------------
+ // 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);
+ 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;
+ }
+ 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;
+ break;
+ }
+ }
+ m_ostream->m_lastwrite = orig_size;
+}
+
+// ----------------------------------------------------------------------------
+// wxInputStream
+// ----------------------------------------------------------------------------
wxInputStream::wxInputStream()
- : wxObject()
{
+ m_i_destroybuf = TRUE;
+ m_i_streambuf = new wxStreamBuffer(*this);
+ m_eof = FALSE;
+}
+
+wxInputStream::wxInputStream(wxStreamBuffer *buffer)
+{
+ m_i_destroybuf = FALSE;
+ m_i_streambuf = buffer;
+ m_eof = FALSE;
}
wxInputStream::~wxInputStream()
{
+ if (m_i_destroybuf)
+ delete m_i_streambuf;
+}
+
+char wxInputStream::GetC()
+{
+ char c;
+ m_i_streambuf->Read(&c, 1);
+ return c;
+}
+
+wxInputStream& wxInputStream::Read(void *buffer, size_t size)
+{
+ m_i_streambuf->Read(buffer, size);
+ // wxStreamBuffer sets all variables for us
+ return *this;
}
#define BUF_TEMP_SIZE 10000
return *this;
}
+wxInputStream& wxInputStream::operator>>(wxString& line)
+{
+ wxDataInputStream s(*this);
+
+ line = s.ReadLine();
+ return *this;
+}
+
+wxInputStream& wxInputStream::operator>>(char& c)
+{
+ c = GetC();
+ return *this;
+}
+
+wxInputStream& wxInputStream::operator>>(short& i)
+{
+ long l;
+
+ *this >> l;
+ i = (short)l;
+ return *this;
+}
+
+wxInputStream& wxInputStream::operator>>(int& i)
+{
+ long l;
+
+ *this >> l;
+ i = (short)l;
+ return *this;
+}
+
+wxInputStream& wxInputStream::operator>>(long& i)
+{
+ /* I only implemented a simple integer parser */
+ int c, sign;
+
+ while (isspace( c = GetC() ) )
+ /* Do nothing */ ;
+
+ i = 0;
+ if (! (c == '-' || isdigit(c)) ) {
+ InputStreamBuffer()->WriteBack(c);
+ return *this;
+ }
+
+ if (c == '-') {
+ sign = -1;
+ c = GetC();
+ } else
+ sign = 1;
+
+ while (isdigit(c)) {
+ i = i*10 + c;
+ c = GetC();
+ }
+
+ i *= sign;
+
+ return *this;
+}
+
+wxInputStream& wxInputStream::operator>>(float& f)
+{
+ /* I only implemented a simple float parser */
+ int c, sign;
+
+ while (isspace( c = GetC() ) )
+ /* Do nothing */ ;
+
+ f = 0.0;
+ if (! (c == '-' || isdigit(c)) ) {
+ InputStreamBuffer()->WriteBack(c);
+ return *this;
+ }
+
+ if (c == '-') {
+ sign = -1;
+ c = GetC();
+ } else
+ sign = 1;
+
+ while (isdigit(c)) {
+ f = f*10 + c;
+ c = GetC();
+ }
+
+ if (c == '.') {
+ float f_multiplicator = 0.1;
+ c = GetC();
+
+ while (isdigit(c)) {
+ f += c*f_multiplicator;
+ f_multiplicator /= 10;
+ c = GetC();
+ }
+ }
+
+ f *= sign;
+
+ return *this;
+}
+
+wxInputStream& wxInputStream::operator>>(wxObject *& obj)
+{
+ wxObjectInputStream obj_s(*this);
+ obj = obj_s.LoadObject();
+ return *this;
+}
+
+off_t wxInputStream::SeekI(off_t pos, wxSeekMode mode)
+{
+ off_t ret_off;
+
+ 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;
+ }
+ 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;
+ }
+ 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()
- : wxObject()
{
+ m_o_destroybuf = TRUE;
+ m_o_streambuf = new wxStreamBuffer(*this);
+}
+
+wxOutputStream::wxOutputStream(wxStreamBuffer *buffer)
+{
+ m_o_destroybuf = FALSE;
+ m_o_streambuf = buffer;
}
wxOutputStream::~wxOutputStream()
{
+ if (m_o_destroybuf)
+ delete m_o_streambuf;
+}
+
+wxOutputStream& wxOutputStream::Write(const void *buffer, size_t size)
+{
+ m_o_streambuf->Write(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 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;
+}
+
+off_t wxOutputStream::TellO() const
+{
+ return DoTellOutput() - m_o_streambuf->GetLastAccess()
+ + m_o_streambuf->GetIntPosition();
+}
+
+void wxOutputStream::Sync()
+{
+ DoWrite(m_o_streambuf->GetBufferStart(), m_o_streambuf->GetIntPosition());
+
+ m_o_streambuf->ResetBuffer();
+}
+
+wxOutputStream& wxOutputStream::operator<<(const char *string)
+{
+ return Write(string, strlen(string));
+}
+
+wxOutputStream& wxOutputStream::operator<<(wxString& string)
+{
+ return Write(string, string.Len());
+}
+
+wxOutputStream& wxOutputStream::operator<<(char c)
+{
+ return Write(&c, 1);
+}
+
+wxOutputStream& wxOutputStream::operator<<(short i)
+{
+ wxString strint;
+
+ strint.Printf("%i", i);
+ return Write(strint, strint.Len());
+}
+
+wxOutputStream& wxOutputStream::operator<<(int i)
+{
+ wxString strint;
+
+ strint.Printf("%i", i);
+ return Write(strint, strint.Len());
+}
+
+wxOutputStream& wxOutputStream::operator<<(long i)
+{
+ wxString strlong;
+
+ strlong.Printf("%i", i);
+ return Write((const char *)strlong, strlong.Len());
+}
+
+wxOutputStream& wxOutputStream::operator<<(double f)
+{
+ wxString strfloat;
+
+ strfloat.Printf("%f", f);
+ return Write(strfloat, strfloat.Len());
+}
+
+wxOutputStream& wxOutputStream::operator<<(wxObject& obj)
+{
+ wxObjectOutputStream obj_s(*this);
+ obj_s.SaveObject(obj);
+ return *this;
+}
+
+// ----------------------------------------------------------------------------
+// wxFilterInputStream
+// ----------------------------------------------------------------------------
wxFilterInputStream::wxFilterInputStream(wxInputStream& stream)
- : wxInputStream()
+ : 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();
+}
+
+off_t wxFilterInputStream::DoSeekInput(off_t pos, wxSeekMode mode)
+{
+ return m_parent_i_stream->SeekI(pos, mode);
+}
+
+off_t wxFilterInputStream::DoTellInput() const
+{
+ return m_parent_i_stream->TellI();
+}
+
+
+// ----------------------------------------------------------------------------
+// wxFilterOutputStream
+// ----------------------------------------------------------------------------
wxFilterOutputStream::wxFilterOutputStream(wxOutputStream& stream)
- : wxOutputStream()
+ : 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)
+{
+ return m_parent_o_stream->SeekO(pos, mode);
+}
+
+off_t wxFilterOutputStream::DoTellOutput() const
+{
+ return m_parent_o_stream->TellO();
+}
+
+// ----------------------------------------------------------------------------
+// Some IOManip function
+// ----------------------------------------------------------------------------
+
+wxOutputStream& wxEndL(wxOutputStream& stream)
+{
+#ifdef __MSW__
+ return stream.Write("\r\n", 2);
+#else
+ return stream.Write("\n", 1);
+#endif
+}
projects / wxWidgets.git / blobdiff