| 1 | ///////////////////////////////////////////////////////////////////////////// |
| 2 | // Name: src/common/fs_mem.cpp |
| 3 | // Purpose: in-memory file system |
| 4 | // Author: Vaclav Slavik |
| 5 | // RCS-ID: $Id$ |
| 6 | // Copyright: (c) 2000 Vaclav Slavik |
| 7 | // Licence: wxWindows licence |
| 8 | ///////////////////////////////////////////////////////////////////////////// |
| 9 | |
| 10 | #include "wx/wxprec.h" |
| 11 | |
| 12 | #ifdef __BORLANDC__ |
| 13 | #pragma hdrstop |
| 14 | #endif |
| 15 | |
| 16 | #if wxUSE_FILESYSTEM && wxUSE_STREAMS |
| 17 | |
| 18 | #include "wx/fs_mem.h" |
| 19 | |
| 20 | #ifndef WX_PRECOMP |
| 21 | #include "wx/intl.h" |
| 22 | #include "wx/log.h" |
| 23 | #include "wx/hash.h" |
| 24 | #include "wx/wxcrtvararg.h" |
| 25 | #if wxUSE_GUI |
| 26 | #include "wx/bitmap.h" |
| 27 | #include "wx/image.h" |
| 28 | #endif // wxUSE_GUI |
| 29 | #endif |
| 30 | |
| 31 | #include "wx/mstream.h" |
| 32 | |
| 33 | class MemFSHashObj : public wxObject |
| 34 | { |
| 35 | public: |
| 36 | |
| 37 | MemFSHashObj(const void *data, size_t len, const wxString& mime) |
| 38 | { |
| 39 | m_Data = new char[len]; |
| 40 | memcpy(m_Data, data, len); |
| 41 | m_Len = len; |
| 42 | m_MimeType = mime; |
| 43 | InitTime(); |
| 44 | } |
| 45 | |
| 46 | MemFSHashObj(const wxMemoryOutputStream& stream, const wxString& mime) |
| 47 | { |
| 48 | m_Len = stream.GetSize(); |
| 49 | m_Data = new char[m_Len]; |
| 50 | stream.CopyTo(m_Data, m_Len); |
| 51 | m_MimeType = mime; |
| 52 | InitTime(); |
| 53 | } |
| 54 | |
| 55 | virtual ~MemFSHashObj() |
| 56 | { |
| 57 | delete[] m_Data; |
| 58 | } |
| 59 | |
| 60 | char *m_Data; |
| 61 | size_t m_Len; |
| 62 | wxString m_MimeType; |
| 63 | #if wxUSE_DATETIME |
| 64 | wxDateTime m_Time; |
| 65 | #endif // wxUSE_DATETIME |
| 66 | |
| 67 | DECLARE_NO_COPY_CLASS(MemFSHashObj) |
| 68 | |
| 69 | private: |
| 70 | void InitTime() |
| 71 | { |
| 72 | #if wxUSE_DATETIME |
| 73 | m_Time = wxDateTime::Now(); |
| 74 | #endif // wxUSE_DATETIME |
| 75 | } |
| 76 | }; |
| 77 | |
| 78 | #if wxUSE_BASE |
| 79 | |
| 80 | |
| 81 | //-------------------------------------------------------------------------------- |
| 82 | // wxMemoryFSHandler |
| 83 | //-------------------------------------------------------------------------------- |
| 84 | |
| 85 | |
| 86 | wxHashTable *wxMemoryFSHandlerBase::m_Hash = NULL; |
| 87 | |
| 88 | |
| 89 | wxMemoryFSHandlerBase::wxMemoryFSHandlerBase() : wxFileSystemHandler() |
| 90 | { |
| 91 | } |
| 92 | |
| 93 | |
| 94 | |
| 95 | wxMemoryFSHandlerBase::~wxMemoryFSHandlerBase() |
| 96 | { |
| 97 | // as only one copy of FS handler is supposed to exist, we may silently |
| 98 | // delete static data here. (There is no way how to remove FS handler from |
| 99 | // wxFileSystem other than releasing _all_ handlers.) |
| 100 | |
| 101 | if (m_Hash) |
| 102 | { |
| 103 | WX_CLEAR_HASH_TABLE(*m_Hash); |
| 104 | delete m_Hash; |
| 105 | m_Hash = NULL; |
| 106 | } |
| 107 | } |
| 108 | |
| 109 | |
| 110 | |
| 111 | bool wxMemoryFSHandlerBase::CanOpen(const wxString& location) |
| 112 | { |
| 113 | wxString p = GetProtocol(location); |
| 114 | return (p == wxT("memory")); |
| 115 | } |
| 116 | |
| 117 | |
| 118 | |
| 119 | |
| 120 | wxFSFile* wxMemoryFSHandlerBase::OpenFile(wxFileSystem& WXUNUSED(fs), const wxString& location) |
| 121 | { |
| 122 | if (m_Hash) |
| 123 | { |
| 124 | MemFSHashObj *obj = (MemFSHashObj*) m_Hash -> Get(GetRightLocation(location)); |
| 125 | if (obj == NULL) return NULL; |
| 126 | else return new wxFSFile(new wxMemoryInputStream(obj -> m_Data, obj -> m_Len), |
| 127 | location, |
| 128 | obj->m_MimeType, |
| 129 | GetAnchor(location) |
| 130 | #if wxUSE_DATETIME |
| 131 | , obj -> m_Time |
| 132 | #endif // wxUSE_DATETIME |
| 133 | ); |
| 134 | } |
| 135 | else return NULL; |
| 136 | } |
| 137 | |
| 138 | |
| 139 | |
| 140 | wxString wxMemoryFSHandlerBase::FindFirst(const wxString& WXUNUSED(spec), |
| 141 | int WXUNUSED(flags)) |
| 142 | { |
| 143 | wxFAIL_MSG(wxT("wxMemoryFSHandlerBase::FindFirst not implemented")); |
| 144 | |
| 145 | return wxEmptyString; |
| 146 | } |
| 147 | |
| 148 | |
| 149 | |
| 150 | wxString wxMemoryFSHandlerBase::FindNext() |
| 151 | { |
| 152 | wxFAIL_MSG(wxT("wxMemoryFSHandlerBase::FindNext not implemented")); |
| 153 | |
| 154 | return wxEmptyString; |
| 155 | } |
| 156 | |
| 157 | |
| 158 | bool wxMemoryFSHandlerBase::CheckHash(const wxString& filename) |
| 159 | { |
| 160 | if (m_Hash == NULL) |
| 161 | { |
| 162 | m_Hash = new wxHashTable(wxKEY_STRING); |
| 163 | } |
| 164 | |
| 165 | if (m_Hash -> Get(filename) != NULL) |
| 166 | { |
| 167 | wxString s; |
| 168 | s.Printf(_("Memory VFS already contains file '%s'!"), filename.c_str()); |
| 169 | wxLogError(s); |
| 170 | return false; |
| 171 | } |
| 172 | else |
| 173 | return true; |
| 174 | } |
| 175 | |
| 176 | |
| 177 | /*static*/ |
| 178 | void wxMemoryFSHandlerBase::AddFileWithMimeType(const wxString& filename, |
| 179 | const wxString& textdata, |
| 180 | const wxString& mimetype) |
| 181 | { |
| 182 | AddFileWithMimeType(filename, |
| 183 | (const void*) textdata.mb_str(), textdata.length(), |
| 184 | mimetype); |
| 185 | } |
| 186 | |
| 187 | |
| 188 | /*static*/ |
| 189 | void wxMemoryFSHandlerBase::AddFileWithMimeType(const wxString& filename, |
| 190 | const void *binarydata, size_t size, |
| 191 | const wxString& mimetype) |
| 192 | { |
| 193 | if (!CheckHash(filename)) return; |
| 194 | m_Hash -> Put(filename, new MemFSHashObj(binarydata, size, mimetype)); |
| 195 | } |
| 196 | |
| 197 | /*static*/ |
| 198 | void wxMemoryFSHandlerBase::AddFile(const wxString& filename, |
| 199 | const wxString& textdata) |
| 200 | { |
| 201 | AddFileWithMimeType(filename, textdata, wxEmptyString); |
| 202 | } |
| 203 | |
| 204 | |
| 205 | /*static*/ |
| 206 | void wxMemoryFSHandlerBase::AddFile(const wxString& filename, |
| 207 | const void *binarydata, size_t size) |
| 208 | { |
| 209 | AddFileWithMimeType(filename, binarydata, size, wxEmptyString); |
| 210 | } |
| 211 | |
| 212 | |
| 213 | |
| 214 | /*static*/ void wxMemoryFSHandlerBase::RemoveFile(const wxString& filename) |
| 215 | { |
| 216 | if (m_Hash == NULL || |
| 217 | m_Hash -> Get(filename) == NULL) |
| 218 | { |
| 219 | wxString s; |
| 220 | s.Printf(_("Trying to remove file '%s' from memory VFS, but it is not loaded!"), filename.c_str()); |
| 221 | wxLogError(s); |
| 222 | } |
| 223 | |
| 224 | else |
| 225 | delete m_Hash -> Delete(filename); |
| 226 | } |
| 227 | |
| 228 | #endif // wxUSE_BASE |
| 229 | |
| 230 | #if wxUSE_GUI |
| 231 | |
| 232 | #if wxUSE_IMAGE |
| 233 | /*static*/ void |
| 234 | wxMemoryFSHandler::AddFile(const wxString& filename, |
| 235 | const wxImage& image, |
| 236 | long type) |
| 237 | { |
| 238 | if (!CheckHash(filename)) return; |
| 239 | |
| 240 | wxMemoryOutputStream mems; |
| 241 | if (image.Ok() && image.SaveFile(mems, (int)type)) |
| 242 | { |
| 243 | m_Hash->Put |
| 244 | ( |
| 245 | filename, |
| 246 | new MemFSHashObj |
| 247 | ( |
| 248 | mems, |
| 249 | wxImage::FindHandler(type)->GetMimeType() |
| 250 | ) |
| 251 | ); |
| 252 | } |
| 253 | else |
| 254 | { |
| 255 | wxString s; |
| 256 | s.Printf(_("Failed to store image '%s' to memory VFS!"), filename.c_str()); |
| 257 | wxPrintf(wxT("'%s'\n"), s.c_str()); |
| 258 | wxLogError(s); |
| 259 | } |
| 260 | } |
| 261 | |
| 262 | /*static*/ void |
| 263 | wxMemoryFSHandler::AddFile(const wxString& filename, |
| 264 | const wxBitmap& bitmap, |
| 265 | long type) |
| 266 | { |
| 267 | #if !defined(__WXMSW__) || wxUSE_WXDIB |
| 268 | wxImage img = bitmap.ConvertToImage(); |
| 269 | AddFile(filename, img, type); |
| 270 | #endif |
| 271 | } |
| 272 | |
| 273 | #endif // wxUSE_IMAGE |
| 274 | |
| 275 | #endif // wxUSE_GUI |
| 276 | |
| 277 | |
| 278 | #endif // wxUSE_FILESYSTEM && wxUSE_FS_ZIP |