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