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5526e819 VS |
1 | ///////////////////////////////////////////////////////////////////////////// |
2 | // Name: zipstream.cpp | |
3 | // Purpose: input stream for ZIP archive access | |
4 | // Author: Vaclav Slavik | |
5 | // Copyright: (c) 1999 Vaclav Slavik | |
6 | // Licence: wxWindows Licence | |
7 | ///////////////////////////////////////////////////////////////////////////// | |
8 | ||
9 | #ifdef __GNUG__ | |
5279a24d | 10 | #pragma implementation "zipstrm.h" |
5526e819 VS |
11 | #endif |
12 | ||
d1af991f RR |
13 | // For compilers that support precompilation, includes "wx.h". |
14 | #include "wx/wxprec.h" | |
5526e819 | 15 | |
d1af991f RR |
16 | #ifdef __BORLANDC__ |
17 | #pragma hdrstop | |
5526e819 VS |
18 | #endif |
19 | ||
e90c1d2a | 20 | #if wxUSE_STREAMS && wxUSE_ZIPSTREAM && wxUSE_ZLIB |
d78b3d64 | 21 | |
d1af991f RR |
22 | #include "wx/log.h" |
23 | #include "wx/intl.h" | |
24 | #include "wx/stream.h" | |
25 | #include "wx/wfstream.h" | |
6001e347 | 26 | #include "wx/zipstrm.h" |
ea4f5235 JS |
27 | |
28 | /* Not the right solution (paths in makefiles) but... */ | |
29 | #ifdef __BORLANDC__ | |
30 | #include "../common/unzip.h" | |
31 | #else | |
5526e819 | 32 | #include "unzip.h" |
ea4f5235 JS |
33 | #endif |
34 | ||
5526e819 | 35 | |
5526e819 VS |
36 | wxZipInputStream::wxZipInputStream(const wxString& archive, const wxString& file) : wxInputStream() |
37 | { | |
38 | unz_file_info zinfo; | |
39 | ||
40 | m_Pos = 0; | |
41 | m_Size = 0; | |
f6bcfd97 | 42 | m_Archive = (void*) unzOpen(archive.mb_str()); |
e90c1d2a | 43 | if (m_Archive == NULL) |
d1af991f | 44 | { |
5526e819 VS |
45 | m_lasterror = wxStream_READ_ERR; |
46 | return; | |
47 | } | |
f6bcfd97 | 48 | if (unzLocateFile((unzFile)m_Archive, file.mb_str(), 0) != UNZ_OK) |
d1af991f | 49 | { |
5526e819 VS |
50 | m_lasterror = wxStream_READ_ERR; |
51 | return; | |
52 | } | |
e90c1d2a | 53 | |
d1af991f | 54 | unzGetCurrentFileInfo((unzFile)m_Archive, &zinfo, (char*) NULL, 0, (void*) NULL, 0, (char*) NULL, 0); |
5526e819 | 55 | |
e90c1d2a | 56 | if (unzOpenCurrentFile((unzFile)m_Archive) != UNZ_OK) |
d1af991f | 57 | { |
5526e819 VS |
58 | m_lasterror = wxStream_READ_ERR; |
59 | return; | |
60 | } | |
479cd5de | 61 | m_Size = (size_t)zinfo.uncompressed_size; |
5526e819 VS |
62 | } |
63 | ||
64 | ||
65 | ||
66 | wxZipInputStream::~wxZipInputStream() | |
67 | { | |
e90c1d2a | 68 | if (m_Archive) |
d1af991f | 69 | { |
5526e819 VS |
70 | if (m_Size != 0) |
71 | unzCloseCurrentFile((unzFile)m_Archive); | |
72 | unzClose((unzFile)m_Archive); | |
73 | } | |
74 | } | |
75 | ||
f6bcfd97 BP |
76 | bool wxZipInputStream::Eof() const |
77 | { | |
78 | wxASSERT_MSG( m_Pos <= (off_t)m_Size, | |
79 | _T("wxZipInputStream: invalid current position") ); | |
80 | ||
81 | return m_Pos >= (off_t)m_Size; | |
82 | } | |
5526e819 VS |
83 | |
84 | ||
85 | size_t wxZipInputStream::OnSysRead(void *buffer, size_t bufsize) | |
86 | { | |
f6bcfd97 BP |
87 | wxASSERT_MSG( m_Pos <= (off_t)m_Size, |
88 | _T("wxZipInputStream: invalid current position") ); | |
89 | ||
90 | if ( m_Pos >= (off_t)m_Size ) | |
91 | { | |
92 | m_lasterror = wxStream_EOF; | |
93 | return 0; | |
94 | } | |
95 | ||
96 | if (m_Pos + bufsize > m_Size) | |
97 | bufsize = m_Size - m_Pos; | |
98 | ||
5526e819 VS |
99 | unzReadCurrentFile((unzFile)m_Archive, buffer, bufsize); |
100 | m_Pos += bufsize; | |
f6bcfd97 | 101 | |
5526e819 VS |
102 | return bufsize; |
103 | } | |
104 | ||
105 | ||
106 | ||
107 | off_t wxZipInputStream::OnSysSeek(off_t seek, wxSeekMode mode) | |
108 | { | |
109 | off_t nextpos; | |
110 | void *buf; | |
111 | ||
e90c1d2a | 112 | switch (mode) |
d1af991f | 113 | { |
5526e819 VS |
114 | case wxFromCurrent : nextpos = seek + m_Pos; break; |
115 | case wxFromStart : nextpos = seek; break; | |
116 | case wxFromEnd : nextpos = m_Size - 1 + seek; break; | |
117 | default : nextpos = m_Pos; break; /* just to fool compiler, never happens */ | |
118 | } | |
119 | ||
120 | // cheated seeking : | |
e90c1d2a | 121 | if (nextpos > m_Pos) |
d1af991f | 122 | { |
5526e819 VS |
123 | buf = malloc(nextpos - m_Pos); |
124 | unzReadCurrentFile((unzFile)m_Archive, buf, nextpos - m_Pos); | |
125 | free(buf); | |
126 | } | |
127 | else if (nextpos < m_Pos) { | |
128 | unzCloseCurrentFile((unzFile)m_Archive); | |
e90c1d2a VZ |
129 | if (unzOpenCurrentFile((unzFile)m_Archive) != UNZ_OK) |
130 | { | |
5526e819 VS |
131 | m_lasterror = wxStream_READ_ERR; |
132 | return m_Pos; | |
133 | } | |
134 | buf = malloc(nextpos); | |
135 | unzReadCurrentFile((unzFile)m_Archive, buf, nextpos); | |
136 | free(buf); | |
137 | } | |
138 | ||
139 | m_Pos = nextpos; | |
140 | return m_Pos; | |
141 | } | |
142 | ||
d78b3d64 | 143 | #endif |
e90c1d2a | 144 | // wxUSE_STREAMS && wxUSE_ZIPSTREAM && wxUSE_ZLIB |