X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/1678ad780265f08fc8b84d180c04ae3a9900b1bb..d05237ea7ba713f5dd0af8ffb4ac62e3b0cd69c7:/src/common/stream.cpp diff --git a/src/common/stream.cpp b/src/common/stream.cpp index b3a43423a7..4f24cfc97a 100644 --- a/src/common/stream.cpp +++ b/src/common/stream.cpp @@ -15,47 +15,555 @@ // For compilers that support precompilation, includes "wx.h". #include "wx/wxprec.h" +#include #include +#include +#include #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; + + 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() +{ + 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; + printf("Buffer(0x%x)->Write: 0x%x, %d\n", this, m_wback, m_wbacksize); + 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; + + printf("Buffer(0x%x): 0x%x, %d\n", this, m_wback, m_wbacksize); + 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_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 + // ------------------ + + 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 +575,225 @@ 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 +805,13 @@ wxFilterInputStream::~wxFilterInputStream() // ---------------------------------------------------------------------------- // wxFilterOutputStream // ---------------------------------------------------------------------------- +wxFilterOutputStream::wxFilterOutputStream() + : wxOutputStream(NULL) +{ +} + wxFilterOutputStream::wxFilterOutputStream(wxOutputStream& stream) - : wxOutputStream() + : wxOutputStream(stream.OutputStreamBuffer()) { m_parent_o_stream = &stream; } @@ -129,3 +819,16 @@ 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 +}