| 1 | ///////////////////////////////////////////////////////////////////////////// |
| 2 | // Name: fs_mem.cpp |
| 3 | // Purpose: in-memory file system |
| 4 | // Author: Vaclav Slavik |
| 5 | // Copyright: (c) 2000 Vaclav Slavik |
| 6 | // Licence: wxWindows Licence |
| 7 | ///////////////////////////////////////////////////////////////////////////// |
| 8 | |
| 9 | |
| 10 | #ifdef __GNUG__ |
| 11 | #pragma implementation "fs_mem.h" |
| 12 | #endif |
| 13 | |
| 14 | #include "wx/wxprec.h" |
| 15 | |
| 16 | #ifdef __BORLANDC__ |
| 17 | #pragma hdrstop |
| 18 | #endif |
| 19 | |
| 20 | #if wxUSE_FILESYSTEM && wxUSE_STREAMS |
| 21 | |
| 22 | #include "wx/fs_mem.h" |
| 23 | |
| 24 | #if wxUSE_GUI |
| 25 | #include "wx/image.h" |
| 26 | #include "wx/bitmap.h" |
| 27 | #endif // wxUSE_GUI |
| 28 | |
| 29 | #ifndef WXPRECOMP |
| 30 | #include "wx/intl.h" |
| 31 | #include "wx/log.h" |
| 32 | #include "wx/hash.h" |
| 33 | #endif |
| 34 | |
| 35 | #include "wx/mstream.h" |
| 36 | |
| 37 | class MemFSHashObj : public wxObject |
| 38 | { |
| 39 | public: |
| 40 | |
| 41 | MemFSHashObj(const void *data, size_t len) |
| 42 | { |
| 43 | m_Data = new char[len]; |
| 44 | memcpy(m_Data, data, len); |
| 45 | m_Len = len; |
| 46 | InitTime(); |
| 47 | } |
| 48 | |
| 49 | MemFSHashObj(wxMemoryOutputStream& stream) |
| 50 | { |
| 51 | m_Len = stream.GetSize(); |
| 52 | m_Data = new char[m_Len]; |
| 53 | stream.CopyTo(m_Data, m_Len); |
| 54 | InitTime(); |
| 55 | } |
| 56 | |
| 57 | ~MemFSHashObj() |
| 58 | { |
| 59 | delete[] m_Data; |
| 60 | } |
| 61 | |
| 62 | char *m_Data; |
| 63 | size_t m_Len; |
| 64 | #if wxUSE_DATETIME |
| 65 | wxDateTime m_Time; |
| 66 | #endif // wxUSE_DATETIME |
| 67 | |
| 68 | DECLARE_NO_COPY_CLASS(MemFSHashObj) |
| 69 | |
| 70 | private: |
| 71 | void InitTime() |
| 72 | { |
| 73 | #if wxUSE_DATETIME |
| 74 | m_Time = wxDateTime::Now(); |
| 75 | #endif // wxUSE_DATETIME |
| 76 | } |
| 77 | }; |
| 78 | |
| 79 | #if wxUSE_BASE |
| 80 | |
| 81 | |
| 82 | //-------------------------------------------------------------------------------- |
| 83 | // wxMemoryFSHandler |
| 84 | //-------------------------------------------------------------------------------- |
| 85 | |
| 86 | |
| 87 | wxHashTable *wxMemoryFSHandlerBase::m_Hash = NULL; |
| 88 | |
| 89 | |
| 90 | wxMemoryFSHandlerBase::wxMemoryFSHandlerBase() : wxFileSystemHandler() |
| 91 | { |
| 92 | } |
| 93 | |
| 94 | |
| 95 | |
| 96 | wxMemoryFSHandlerBase::~wxMemoryFSHandlerBase() |
| 97 | { |
| 98 | // as only one copy of FS handler is supposed to exist, we may silently |
| 99 | // delete static data here. (There is no way how to remove FS handler from |
| 100 | // wxFileSystem other than releasing _all_ handlers.) |
| 101 | |
| 102 | if (m_Hash) |
| 103 | { |
| 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 | GetMimeTypeFromExt(location), |
| 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 | m_Hash -> DeleteContents(TRUE); |
| 164 | } |
| 165 | |
| 166 | if (m_Hash -> Get(filename) != NULL) |
| 167 | { |
| 168 | wxString s; |
| 169 | s.Printf(_("Memory VFS already contains file '%s'!"), filename.c_str()); |
| 170 | wxLogError(s); |
| 171 | return FALSE; |
| 172 | } |
| 173 | else |
| 174 | return TRUE; |
| 175 | } |
| 176 | |
| 177 | |
| 178 | /*static*/ void wxMemoryFSHandlerBase::AddFile(const wxString& filename, const wxString& textdata) |
| 179 | { |
| 180 | AddFile(filename, (const void*) textdata.mb_str(), textdata.Length()); |
| 181 | } |
| 182 | |
| 183 | |
| 184 | /*static*/ void wxMemoryFSHandlerBase::AddFile(const wxString& filename, const void *binarydata, size_t size) |
| 185 | { |
| 186 | if (!CheckHash(filename)) return; |
| 187 | m_Hash -> Put(filename, new MemFSHashObj(binarydata, size)); |
| 188 | } |
| 189 | |
| 190 | |
| 191 | |
| 192 | /*static*/ void wxMemoryFSHandlerBase::RemoveFile(const wxString& filename) |
| 193 | { |
| 194 | if (m_Hash == NULL || |
| 195 | m_Hash -> Get(filename) == NULL) |
| 196 | { |
| 197 | wxString s; |
| 198 | s.Printf(_("Trying to remove file '%s' from memory VFS, but it is not loaded!"), filename.c_str()); |
| 199 | wxLogError(s); |
| 200 | } |
| 201 | |
| 202 | else |
| 203 | delete m_Hash -> Delete(filename); |
| 204 | } |
| 205 | |
| 206 | #endif // wxUSE_BASE |
| 207 | |
| 208 | #if wxUSE_GUI |
| 209 | |
| 210 | #if wxUSE_IMAGE |
| 211 | /*static*/ void |
| 212 | wxMemoryFSHandler::AddFile(const wxString& filename, wxImage& image, long type) |
| 213 | { |
| 214 | if (!CheckHash(filename)) return; |
| 215 | |
| 216 | wxMemoryOutputStream mems; |
| 217 | if (image.Ok() && image.SaveFile(mems, (int)type)) |
| 218 | m_Hash -> Put(filename, new MemFSHashObj(mems)); |
| 219 | else |
| 220 | { |
| 221 | wxString s; |
| 222 | s.Printf(_("Failed to store image '%s' to memory VFS!"), filename.c_str()); |
| 223 | wxPrintf(wxT("'%s'\n"), s.c_str()); |
| 224 | wxLogError(s); |
| 225 | } |
| 226 | } |
| 227 | #endif // wxUSE_IMAGE |
| 228 | |
| 229 | /*static*/ void wxMemoryFSHandler::AddFile(const wxString& filename, const wxBitmap& bitmap, long type) |
| 230 | { |
| 231 | wxImage img = bitmap.ConvertToImage(); |
| 232 | AddFile(filename, img, type); |
| 233 | } |
| 234 | |
| 235 | #endif |
| 236 | |
| 237 | |
| 238 | #endif // wxUSE_FILESYSTEM && wxUSE_FS_ZIP |
| 239 | |