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| author | Tomas Bzatek <tbzatek@users.sourceforge.net> | 2008-06-08 11:04:43 +0200 |
|---|---|---|
| committer | Tomas Bzatek <tbzatek@users.sourceforge.net> | 2008-06-08 11:04:43 +0200 |
| commit | 16f738ecee689c6feb2acb7e4ef4d9bb4144ae7d (patch) | |
| tree | 3d22f54f7298f81b18ed66d05a62fa8bfab359ab /zip/ZipArchive/ZipMemFile.cpp | |
| download | tuxcmd-modules-16f738ecee689c6feb2acb7e4ef4d9bb4144ae7d.tar.xz | |
Initial commitv0.6.36release-0.6.36-dev
Diffstat (limited to 'zip/ZipArchive/ZipMemFile.cpp')
| -rw-r--r-- | zip/ZipArchive/ZipMemFile.cpp | 110 |
1 files changed, 110 insertions, 0 deletions
diff --git a/zip/ZipArchive/ZipMemFile.cpp b/zip/ZipArchive/ZipMemFile.cpp new file mode 100644 index 0000000..4fae328 --- /dev/null +++ b/zip/ZipArchive/ZipMemFile.cpp @@ -0,0 +1,110 @@ +////////////////////////////////////////////////////////////////////////////////
+// This source file is part of the ZipArchive library source distribution and
+// is Copyrighted 2000 - 2007 by Artpol Software - Tadeusz Dracz
+//
+// This program is free software; you can redistribute it and/or
+// modify it under the terms of the GNU General Public License
+// as published by the Free Software Foundation; either version 2
+// of the License, or (at your option) any later version.
+//
+// For the licensing details refer to the License.txt file.
+//
+// Web Site: http://www.artpol-software.com
+////////////////////////////////////////////////////////////////////////////////
+
+#include "stdafx.h"
+#include "ZipMemFile.h"
+#include "ZipException.h"
+
+//////////////////////////////////////////////////////////////////////
+// Construction/Destruction
+//////////////////////////////////////////////////////////////////////
+
+void CZipMemFile::Grow(size_t nGrowTo)
+{
+ if (m_nBufSize < (UINT)nGrowTo)
+ {
+ if (m_nGrowBy == 0)
+ CZipException::Throw(CZipException::memError);
+ size_t nNewSize = m_nBufSize;
+ while (nNewSize < nGrowTo)
+ nNewSize += m_nGrowBy;
+ BYTE* lpNew;
+ if (m_lpBuf)
+ lpNew = (BYTE*)realloc((void*) m_lpBuf, nNewSize);
+ else
+ lpNew = (BYTE*)malloc(nNewSize);
+
+ if (!lpNew)
+ CZipException::Throw(CZipException::memError);
+ m_nBufSize = nNewSize;
+ m_lpBuf = lpNew;
+ }
+}
+
+void CZipMemFile::SetLength(ZIP_FILE_USIZE nNewLen)
+{
+ if (m_nBufSize < (size_t)nNewLen)
+ Grow((size_t)nNewLen);
+ else
+ m_nPos = (size_t)nNewLen;
+ m_nDataSize = (size_t)nNewLen;
+}
+
+UINT CZipMemFile::Read(void *lpBuf, UINT nCount)
+{
+ if (m_nPos >= m_nDataSize)
+ return 0;
+ UINT nToRead = (m_nPos + nCount > m_nDataSize) ? (UINT)(m_nDataSize - m_nPos) : nCount;
+ memcpy(lpBuf, m_lpBuf + m_nPos, nToRead);
+ m_nPos += nToRead;
+ return nToRead;
+
+}
+
+void CZipMemFile::Write(const void *lpBuf, UINT nCount)
+{
+ if (!nCount)
+ return;
+
+ if (m_nPos + nCount > m_nBufSize)
+ Grow(m_nPos + nCount);
+ memcpy(m_lpBuf + m_nPos, lpBuf, nCount);
+ m_nPos += nCount;
+ if (m_nPos > m_nDataSize)
+ m_nDataSize = m_nPos;
+}
+ZIP_FILE_USIZE CZipMemFile::Seek(ZIP_FILE_SIZE lOff, int nFrom)
+{
+ ZIP_FILE_USIZE lNew = m_nPos;
+
+ if (nFrom == CZipAbstractFile::begin)
+ {
+ if (lOff < 0)
+ CZipException::Throw(CZipException::memError);
+ lNew = lOff;
+ }
+ else if (nFrom == CZipAbstractFile::current)
+ {
+ if (lOff < 0 && (ZIP_FILE_USIZE)(-lOff) > lNew)
+ CZipException::Throw(CZipException::memError);
+ lNew += lOff;
+ }
+ else if (nFrom == CZipAbstractFile::end)
+ {
+ if (lOff < 0 && ZIP_FILE_USIZE(-lOff) > m_nDataSize)
+ CZipException::Throw(CZipException::memError);
+ lNew = m_nDataSize + lOff;
+ }
+ else
+ return lNew;
+
+ // assumption that size_t is always signed
+ if (lNew > (size_t)(-1)) // max of size_t
+ CZipException::Throw(CZipException::memError);
+ if (lNew > m_nDataSize)
+ Grow((size_t)lNew);
+
+ m_nPos = (size_t)lNew;
+ return lNew;
+}
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