+/////////////////////////////////////////////////////////////////////////////
+// Read a zip header
+
+class wxZipHeader
+{
+public:
+ wxZipHeader(wxInputStream& stream, size_t size);
+
+ inline wxUint8 Read8();
+ inline wxUint16 Read16();
+ inline wxUint32 Read32();
+
+ const char *GetData() const { return m_data; }
+ size_t GetSize() const { return m_size; }
+ operator bool() const { return m_ok; }
+
+ size_t Seek(size_t pos) { m_pos = pos; return m_pos; }
+ size_t Skip(size_t size) { m_pos += size; return m_pos; }
+
+ wxZipHeader& operator>>(wxUint8& n) { n = Read8(); return *this; }
+ wxZipHeader& operator>>(wxUint16& n) { n = Read16(); return *this; }
+ wxZipHeader& operator>>(wxUint32& n) { n = Read32(); return *this; }
+
+private:
+ char m_data[64];
+ size_t m_size;
+ size_t m_pos;
+ bool m_ok;
+};
+
+wxZipHeader::wxZipHeader(wxInputStream& stream, size_t size)
+ : m_size(0),
+ m_pos(0),
+ m_ok(false)
+{
+ wxCHECK_RET(size <= sizeof(m_data), _T("buffer too small"));
+ m_size = stream.Read(m_data, size).LastRead();
+ m_ok = m_size == size;
+}
+
+wxUint8 wxZipHeader::Read8()
+{
+ wxASSERT(m_pos < m_size);
+ return *wx_reinterpret_cast(wxUint8*, m_data + m_pos++);
+}
+
+wxUint16 wxZipHeader::Read16()
+{
+ wxASSERT(m_pos + 2 <= m_size);
+ wxUint16 n = *wx_reinterpret_cast(wxUint16*, m_data + m_pos);
+ m_pos += 2;
+ return wxUINT16_SWAP_ON_BE(n);
+}
+
+wxUint32 wxZipHeader::Read32()
+{
+ wxASSERT(m_pos + 4 <= m_size);
+ wxUint32 n = *wx_reinterpret_cast(wxUint32*, m_data + m_pos);
+ m_pos += 4;
+ return wxUINT32_SWAP_ON_BE(n);
+}
+
+
projects / wxWidgets.git / blobdiff