projects / wxWidgets.git / blame
| Commit | Line | Data |
|---|---|---|
| 121fa06a VZ |
1 | /////////////////////////////////////////////////////////////////////////////// |
| 2 | // Name: common/sstream.cpp | |
| 3 | // Purpose: string-based streams implementation | |
| 4 | // Author: Vadim Zeitlin | |
| 5 | // Modified by: | |
| 6 | // Created: 2004-09-19 | |
| 7 | // RCS-ID: $Id$ | |
| 8 | // Copyright: (c) 2004 Vadim Zeitlin <vadim@wxwindows.org> | |
| 9 | // Licence: wxWindows licence | |
| 10 | /////////////////////////////////////////////////////////////////////////////// | |
| 11 | ||
| 12 | // ============================================================================ | |
| 13 | // declarations | |
| 14 | // ============================================================================ | |
| 15 | ||
| 16 | // ---------------------------------------------------------------------------- | |
| 17 | // headers | |
| 18 | // ---------------------------------------------------------------------------- | |
| 19 | ||
| 20 | // For compilers that support precompilation, includes "wx.h". | |
| 21 | #include "wx/wxprec.h" | |
| 22 | ||
| 23 | #ifdef __BORLANDC__ | |
| 24 | #pragma hdrstop | |
| 25 | #endif | |
| 26 | ||
| 27 | #if wxUSE_STREAMS | |
| 28 | ||
| 29 | #include "wx/sstream.h" | |
| 30 | ||
| 31 | // ============================================================================ | |
| 32 | // wxStringInputStream implementation | |
| 33 | // ============================================================================ | |
| 34 | ||
| 35 | // ---------------------------------------------------------------------------- | |
| 36 | // seek/tell | |
| 37 | // ---------------------------------------------------------------------------- | |
| 38 | ||
| 39 | off_t wxStringInputStream::OnSysSeek(off_t ofs, wxSeekMode mode) | |
| 40 | { | |
| 41 | switch ( mode ) | |
| 42 | { | |
| 43 | case wxFromStart: | |
| 44 | // nothing to do, ofs already ok | |
| 45 | break; | |
| 46 | ||
| 47 | case wxFromEnd: | |
| 48 | ofs += m_str.length()*sizeof(wxChar); | |
| 49 | break; | |
| 50 | ||
| 51 | case wxFromCurrent: | |
| 52 | ofs += m_pos; | |
| 53 | break; | |
| 54 | ||
| 55 | default: | |
| 56 | wxFAIL_MSG( _T("invalid seek mode") ); | |
| 57 | return wxInvalidOffset; | |
| 58 | } | |
| 59 | ||
| 60 | m_pos = wx_static_cast(size_t, ofs); | |
| 61 | ||
| 62 | return ofs; | |
| 63 | } | |
| 64 | ||
| 65 | off_t wxStringInputStream::OnSysTell() const | |
| 66 | { | |
| 67 | return wx_static_cast(off_t, m_pos); | |
| 68 | } | |
| 69 | ||
| 70 | // ---------------------------------------------------------------------------- | |
| 71 | // actual IO | |
| 72 | // ---------------------------------------------------------------------------- | |
| 73 | ||
| 74 | size_t wxStringInputStream::OnSysRead(void *buffer, size_t size) | |
| 75 | { | |
| 76 | const size_t sizeMax = m_str.length()*sizeof(wxChar) - m_pos; | |
| 77 | ||
| 78 | if ( size >= sizeMax ) | |
| 79 | { | |
| 80 | if ( sizeMax == 0 ) | |
| 81 | { | |
| 82 | m_lasterror = wxSTREAM_EOF; | |
| 83 | return 0; | |
| 84 | } | |
| 85 | ||
| 86 | size = sizeMax; | |
| 87 | } | |
| 88 | ||
| 89 | memcpy(buffer, m_str.data() + m_pos, size); | |
| 90 | m_pos += size; | |
| 91 | ||
| 92 | return size; | |
| 93 | } | |
| 94 | ||
| 95 | // ============================================================================ | |
| 96 | // wxStringOutputStream implementation | |
| 97 | // ============================================================================ | |
| 98 | ||
| 99 | // ---------------------------------------------------------------------------- | |
| 100 | // actual IO | |
| 101 | // ---------------------------------------------------------------------------- | |
| 102 | ||
| 103 | size_t wxStringOutputStream::OnSysWrite(const void *buffer, size_t size) | |
| 104 | { | |
| 105 | // in Unicode mode we might not be able to write the last byte | |
| 106 | size_t len = size / sizeof(wxChar); | |
| 107 | ||
| 108 | const wxChar *p = wx_static_cast(const wxChar *, buffer); | |
| 109 | ||
| 110 | m_str->Append(wxString(p, p + len + 1)); | |
| 111 | ||
| 112 | // return number of bytes actually written | |
| 113 | return len*sizeof(wxChar); | |
| 114 | } | |
| 115 | ||
| 116 | #endif // wxUSE_STREAMS | |
| 117 |