diff options
Diffstat (limited to 'plugins/Db3x_mmap/src/dbtool/disk.cpp')
| -rw-r--r-- | plugins/Db3x_mmap/src/dbtool/disk.cpp | 112 |
1 files changed, 112 insertions, 0 deletions
diff --git a/plugins/Db3x_mmap/src/dbtool/disk.cpp b/plugins/Db3x_mmap/src/dbtool/disk.cpp new file mode 100644 index 0000000000..2cf9136a71 --- /dev/null +++ b/plugins/Db3x_mmap/src/dbtool/disk.cpp @@ -0,0 +1,112 @@ +/*
+Miranda Database Tool
+Copyright (C) 2001-2005 Richard Hughes
+
+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.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program; if not, write to the Free Software
+Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+*/
+#include "dbtool.h"
+
+extern DWORD spaceProcessed, sourceFileSize;
+
+int SignatureValid(DWORD ofs, DWORD signature)
+{
+ DWORD sig;
+
+ if (ofs+sizeof(sig) >= sourceFileSize) {
+ AddToStatus(STATUS_ERROR, TranslateT("Invalid offset found (database truncated?)"));
+ return 0;
+ }
+
+ sig = *(DWORD*)(opts.pFile+ofs);
+
+ return sig == signature;
+}
+
+int PeekSegment(DWORD ofs, PVOID buf, int cbBytes)
+{
+ DWORD bytesRead;
+
+ if (ofs >= sourceFileSize) {
+ AddToStatus(STATUS_ERROR, TranslateT("Invalid offset found"));
+ return ERROR_SEEK;
+ }
+
+ if (ofs+cbBytes>sourceFileSize)
+ bytesRead = sourceFileSize - ofs;
+ else
+ bytesRead = cbBytes;
+
+ if (bytesRead == 0) {
+ AddToStatus(STATUS_ERROR, TranslateT("Error reading, database truncated? (%u)"), GetLastError());
+ return ERROR_READ_FAULT;
+ }
+
+ CopyMemory(buf, opts.pFile+ofs, bytesRead);
+
+ if ((int)bytesRead<cbBytes) return ERROR_HANDLE_EOF;
+ return ERROR_SUCCESS;
+}
+
+int ReadSegment(DWORD ofs, PVOID buf, int cbBytes)
+{
+ int ret;
+
+ ret = PeekSegment(ofs, buf, cbBytes);
+ if (ret != ERROR_SUCCESS && ret != ERROR_HANDLE_EOF) return ret;
+
+ if (opts.bAggressive) {
+ if (ofs+cbBytes>sourceFileSize) {
+ AddToStatus(STATUS_WARNING, TranslateT("Can't write to working file, aggressive mode may be too aggressive now"));
+ ZeroMemory(opts.pFile+ofs, sourceFileSize-ofs);
+ }
+ else
+ ZeroMemory(opts.pFile+ofs, cbBytes);
+ }
+ spaceProcessed += cbBytes;
+ return ERROR_SUCCESS;
+}
+
+DWORD WriteSegment(DWORD ofs, PVOID buf, int cbBytes)
+{
+ DWORD bytesWritten;
+ if (opts.bCheckOnly) return 0xbfbfbfbf;
+ if (ofs == WSOFS_END) {
+ ofs = dbhdr.ofsFileEnd;
+ dbhdr.ofsFileEnd += cbBytes;
+ }
+ SetFilePointer(opts.hOutFile, ofs, NULL, FILE_BEGIN);
+ WriteFile(opts.hOutFile, buf, cbBytes, &bytesWritten, NULL);
+ if ((int)bytesWritten<cbBytes) {
+ AddToStatus(STATUS_FATAL, TranslateT("Can't write to output file - disk full? (%u)"), GetLastError());
+ return WS_ERROR;
+ }
+ return ofs;
+}
+
+
+int ReadWrittenSegment(DWORD ofs, PVOID buf, int cbBytes)
+{
+ DWORD bytesRead;
+ if (opts.bCheckOnly) return 0xbfbfbfbf;
+ if (ofs + cbBytes > dbhdr.ofsFileEnd)
+ return ERROR_SEEK;
+
+ SetFilePointer(opts.hOutFile, ofs, NULL, FILE_BEGIN);
+ ReadFile(opts.hOutFile, buf, cbBytes, &bytesRead, NULL);
+ if ((int)bytesRead<cbBytes)
+ return ERROR_READ_FAULT;
+
+ return ERROR_SUCCESS;
+}
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