X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/1678ad780265f08fc8b84d180c04ae3a9900b1bb..eebb848a8516e14cb6c23e1c7b9db56af375733f:/src/common/stream.cpp

diff --git a/src/common/stream.cpp b/src/common/stream.cpp
index b3a43423a7..f2bb737c0d 100644
--- a/src/common/stream.cpp
+++ b/src/common/stream.cpp
@@ -15,47 +15,561 @@
 
 // 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
 
+#define BUF_TEMP_SIZE 10000
+
+// ----------------------------------------------------------------------------
+// wxStreamBuffer
+// ----------------------------------------------------------------------------
+
+#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_wback(NULL), m_wbacksize(0), m_wbackcur(0),
+    m_fixed(TRUE), m_flushable(TRUE), m_stream(&stream),
+    m_mode(mode), m_destroybuf(FALSE), m_destroystream(FALSE)
+{
+}
+
+wxStreamBuffer::wxStreamBuffer(BufMode mode)
+  : m_buffer_start(NULL), m_buffer_end(NULL), m_buffer_pos(NULL),
+    m_buffer_size(0), m_wback(NULL), m_wbacksize(0), m_wbackcur(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(const wxStreamBuffer& buffer)
+{
+  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;
+  m_wback = NULL;
+  m_wbacksize = 0;
+  m_wbackcur = 0;
+}
+
+wxStreamBuffer::~wxStreamBuffer()
+{
+  if (m_wback)
+    free(m_wback);
+  if (m_destroybuf)
+    wxDELETEA(m_buffer_start);
+  if (m_destroystream)
+    delete m_stream;
+}
+
+size_t wxStreamBuffer::WriteBack(const char *buf, size_t bufsize)
+{
+  char *ptrback;
+
+  if (m_mode != read)
+    return 0;
+
+  ptrback = AllocSpaceWBack(bufsize);
+  if (!ptrback)
+    return 0;
+
+  memcpy(ptrback, buf, bufsize);
+  return bufsize;
+}
+
+bool wxStreamBuffer::WriteBack(char c)
+{
+  char *ptrback;
+
+  ptrback = AllocSpaceWBack(1);
+  if (!ptrback)
+    return FALSE;
+
+  *ptrback = c;
+  return TRUE;
+}
+
+void wxStreamBuffer::SetBufferIO(char *buffer_start, char *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)
+{
+  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_size = 0;
+    return;
+  }
+
+  b_start = new char[bufsize];
+  SetBufferIO(b_start, b_start + bufsize);
+  m_destroybuf = TRUE;
+}
+
+void wxStreamBuffer::ResetBuffer()
+{
+  m_stream->m_lasterror = wxStream_NOERROR;
+  m_stream->m_lastcount = 0;
+  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;
+  m_wback = temp_b;
+  
+  return (char *)(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 || !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) {
+    m_buffer_start = (char *)realloc(m_buffer_start, m_buffer_size+size);
+    // 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_stream->OnSysWrite(&c, 1);
+    return;
+  }
+
+  if (!GetDataLeft() && !FlushBuffer()) {
+    CHECK_ERROR(wxStream_READ_ERR);
+    return;
+  }
+
+  PutToBuffer(&c, 1);
+  m_stream->m_lastcount = 1;
+}
+
+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);
+
+  // ------------------
+  // Buffering disabled
+  // ------------------
+
+  m_stream->m_lasterror = wxStream_NOERROR;
+  m_stream->m_lastcount = GetWBack((char *)buffer, size);
+  size -= m_stream->m_lastcount;
+  if (size == 0)
+    return m_stream->m_lastcount;
+
+  buffer = (void *)((char *)buffer+m_stream->m_lastcount);
+
+  if (!m_buffer_size)
+    return (m_stream->m_lastcount += m_stream->OnSysRead(buffer, size));
+
+  // -----------------
+  // Buffering enabled
+  // -----------------
+  size_t buf_left, orig_size = size;
+
+  while (size > 0) {
+    buf_left = GetDataLeft(); 
+
+    // First case: the requested buffer is larger than the stream buffer,
+    //             we split it.
+    if (size > buf_left) {
+      GetFromBuffer(buffer, buf_left);
+      size  -= buf_left;
+      buffer = (char *)buffer + buf_left; // ANSI C++ violation.
+
+      if (!FillBuffer()) {
+        CHECK_ERROR(wxStream_READ_ERR);
+        return (m_stream->m_lastcount = orig_size-size);
+      }
+    } else {
+
+      // Second case: we just copy from the stream buffer.
+      GetFromBuffer(buffer, size);
+      break;
+    }
+  }
+  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;
+
+  while (bytes_read == BUF_TEMP_SIZE) {
+    bytes_read = Read(buf, bytes_read);
+    bytes_read = s_buf->Write(buf, bytes_read);
+    s += bytes_read;
+  }
+  return s;
+}
+
+size_t wxStreamBuffer::Write(const void *buffer, size_t size)
+{
+  wxASSERT(m_stream != NULL);
+
+  // ------------------
+  // Buffering disabled
+  // ------------------
+
+  m_stream->m_lasterror = wxStream_NOERROR;
+  if (!m_buffer_size)
+    return (m_stream->m_lastcount = m_stream->OnSysWrite(buffer, size));
+
+  // ------------------
+  // Buffering enabled
+  // ------------------
+
+  size_t buf_left, orig_size = size;
+
+  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) {
+      PutToBuffer(buffer, buf_left);
+      size -= buf_left;
+      buffer = (char *)buffer + buf_left; // ANSI C++ violation.
+
+      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.
+      PutToBuffer(buffer, size);
+      break;
+    }
+  }
+  return (m_stream->m_lastcount = orig_size);
+}
+
+size_t wxStreamBuffer::Write(wxStreamBuffer *sbuf)
+{
+  char buf[BUF_TEMP_SIZE];
+  size_t s = 0, bytes_count = BUF_TEMP_SIZE, b_count2;
+
+  while (bytes_count == BUF_TEMP_SIZE) {
+    b_count2 = sbuf->Read(buf, bytes_count);
+    bytes_count = Write(buf, b_count2);
+    if (b_count2 > bytes_count)
+      sbuf->WriteBack(buf+bytes_count, b_count2-bytes_count);
+    s += bytes_count;
+  }
+  return s;
+}
+
+off_t wxStreamBuffer::Seek(off_t pos, wxSeekMode mode)
+{
+  off_t ret_off, diff, last_access;
+
+  last_access = GetLastAccess();
+
+  if (!m_flushable) {
+    diff = pos + GetIntPosition();
+    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) ) {
+      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;
+
+  if (m_flushable) {
+    pos = m_stream->OnSysTell();
+    if (pos == wxInvalidOffset)
+      return wxInvalidOffset;
+    return pos - GetLastAccess() + GetIntPosition();
+  } else
+    return GetIntPosition();
+}
+
+size_t wxStreamBuffer::GetDataLeft()
+{
+  if (m_buffer_end == m_buffer_pos && m_flushable)
+    FillBuffer();
+  return m_buffer_end-m_buffer_pos;
+}
+
+// ----------------------------------------------------------------------------
+// wxStreamBase
+// ----------------------------------------------------------------------------
+
+wxStreamBase::wxStreamBase()
+{
+  m_lasterror = wxStream_NOERROR;
+  m_lastcount = 0;
+}
+
+wxStreamBase::~wxStreamBase()
+{
+}
+
+size_t wxStreamBase::OnSysRead(void *WXUNUSED(buffer), size_t WXUNUSED(size))
+{
+  return 0;
+}
+
+size_t wxStreamBase::OnSysWrite(const void *WXUNUSED(buffer), size_t WXUNUSED(bufsize))
+{
+  return 0;
+}
+
+off_t wxStreamBase::OnSysSeek(off_t WXUNUSED(seek), wxSeekMode WXUNUSED(mode))
+{
+  return wxInvalidOffset;
+}
+
+off_t wxStreamBase::OnSysTell() const
+{
+  return wxInvalidOffset;
+}
+
 // ----------------------------------------------------------------------------
 // wxInputStream
 // ----------------------------------------------------------------------------
 
 wxInputStream::wxInputStream()
+  : wxStreamBase()
+{
+  m_i_destroybuf = TRUE;
+  m_i_streambuf = new wxStreamBuffer(*this, wxStreamBuffer::read);
+}
+
+wxInputStream::wxInputStream(wxStreamBuffer *buffer)
+  : wxStreamBase()
 {
+  m_i_destroybuf = FALSE;
+  m_i_streambuf = buffer;
 }
 
 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;
+}
+
+char wxInputStream::Peek()
+{
+  m_i_streambuf->GetDataLeft();
+
+  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) {
     bytes_read = Read(buf, bytes_read).LastRead();
-
-    stream_out.Write(buf, bytes_read);
+    bytes_read = stream_out.Write(buf, bytes_read).LastWrite();
   }
   return *this;
 }
 
-int wxInputStream::Scanf(const wxString& format, ...)
+off_t wxInputStream::SeekI(off_t pos, wxSeekMode mode)
 {
-  va_list params;
+  return m_i_streambuf->Seek(pos, mode);
+}
 
-  va_start(params, format);
-  va_end(params);
+off_t wxInputStream::TellI() const
+{
+  return m_i_streambuf->Tell();
 }
 
+// --------------------
+// Overloaded operators
+// --------------------
+
 wxInputStream& wxInputStream::operator>>(wxString& line)
 {
   wxDataInputStream s(*this);
@@ -67,48 +581,225 @@ wxInputStream& wxInputStream::operator>>(wxString& line)
 wxInputStream& wxInputStream::operator>>(char& c)
 {
   c = GetC();
+  return *this;
 }
 
 wxInputStream& wxInputStream::operator>>(short& i)
 {
-  Scanf("%i", &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)
 {
-  Scanf("%l", &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>>(double& 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 - '0');
+    c = GetC();
+  }
+
+  if (c == '.') {
+    double f_multiplicator = (double) 0.1;
+    c = GetC();
+
+    while (isdigit(c)) {
+      f += (c-'0')*f_multiplicator;
+      f_multiplicator /= 10;
+      c = GetC();
+    }
+  }
+
+  f *= sign;
+
   return *this;
 }
 
-wxInputStream& wxInputStream::operator>>(float& f)
+#if wxUSE_SERIAL
+wxInputStream& wxInputStream::operator>>(wxObject *& obj)
 {
-  Scanf("%f", &f);
+  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, wxStreamBuffer::write);
+}
+
+wxOutputStream::wxOutputStream(wxStreamBuffer *buffer)
+  : wxStreamBase()
+{
+  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::TellO() const
+{
+  return m_o_streambuf->Tell();
+}
+
+off_t wxOutputStream::SeekO(off_t pos, wxSeekMode mode)
+{
+  return m_o_streambuf->Seek(pos, mode);
+}
+
+void wxOutputStream::Sync()
+{
+  m_o_streambuf->FlushBuffer();
+}
+
+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());
+}
+
+#if wxUSE_SERIAL
+wxOutputStream& wxOutputStream::operator<<(wxObject& obj)
+{
+  wxObjectOutputStream obj_s(*this);
+  obj_s.SaveObject(obj);
+  return *this;
+}
+#endif
+
 // ----------------------------------------------------------------------------
 // wxFilterInputStream
 // ----------------------------------------------------------------------------
+wxFilterInputStream::wxFilterInputStream()
+  : wxInputStream(NULL)
+{
+  // WARNING streambuf set to NULL !
+}
+
 wxFilterInputStream::wxFilterInputStream(wxInputStream& stream)
-  : wxInputStream()
+  : wxInputStream(stream.InputStreamBuffer())
 {
   m_parent_i_stream = &stream;
 }
@@ -120,8 +811,13 @@ wxFilterInputStream::~wxFilterInputStream()
 // ----------------------------------------------------------------------------
 // wxFilterOutputStream
 // ----------------------------------------------------------------------------
+wxFilterOutputStream::wxFilterOutputStream()
+  : wxOutputStream(NULL)
+{
+}
+
 wxFilterOutputStream::wxFilterOutputStream(wxOutputStream& stream)
-  : wxOutputStream()
+  : wxOutputStream(stream.OutputStreamBuffer())
 {
   m_parent_o_stream = &stream;
 }
@@ -129,3 +825,16 @@ wxFilterOutputStream::wxFilterOutputStream(wxOutputStream& stream)
 wxFilterOutputStream::~wxFilterOutputStream()
 {
 }
+
+// ----------------------------------------------------------------------------
+// Some IOManip function
+// ----------------------------------------------------------------------------
+
+wxOutputStream& wxEndL(wxOutputStream& stream)
+{
+#ifdef __MSW__
+  return stream.Write("\r\n", 2);
+#else
+  return stream.Write("\n", 1);
+#endif
+}