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authormadmaxoft <github@xoft.cz>2014-02-13 12:48:22 +0100
committermadmaxoft <github@xoft.cz>2014-02-13 16:54:39 +0100
commitcd658e02e8dcb7503d8aa5d75c314dcddb1ca11a (patch)
tree22a1dd2465a4587bef25f50973da6863d8c1dcea /Tools
parentMCADefrag: Initial implementation. (diff)
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Diffstat (limited to 'Tools')
-rw-r--r--Tools/MCADefrag/MCADefrag.cpp20
-rw-r--r--Tools/MCADefrag/MCADefrag.h5
2 files changed, 22 insertions, 3 deletions
diff --git a/Tools/MCADefrag/MCADefrag.cpp b/Tools/MCADefrag/MCADefrag.cpp
index 2f24469c9..59a67e45d 100644
--- a/Tools/MCADefrag/MCADefrag.cpp
+++ b/Tools/MCADefrag/MCADefrag.cpp
@@ -11,6 +11,13 @@
+// An array of 4096 zero bytes, used for writing the padding
+static const Byte g_Zeroes[4096] = {0};
+
+
+
+
+
int main(int argc, char ** argv)
{
new cMCLogger(Printf("Defrag_%08x.log", time(NULL)));
@@ -275,7 +282,7 @@ bool cMCADefrag::cThread::WriteChunk(cFile & a_File, Byte * a_LocationRaw)
a_LocationRaw[0] = m_CurrentSectorOut >> 16;
a_LocationRaw[1] = (m_CurrentSectorOut >> 8) & 0xff;
a_LocationRaw[2] = m_CurrentSectorOut & 0xff;
- a_LocationRaw[3] = (m_CompressedChunkDataSize + (4 KiB) - 1) / (4 KiB);
+ a_LocationRaw[3] = (m_CompressedChunkDataSize + (4 KiB) + 3) / (4 KiB); // +3 because the m_CompressedChunkDataSize doesn't include the exact-length
// Write the data length:
Byte Buf[4];
@@ -295,6 +302,17 @@ bool cMCADefrag::cThread::WriteChunk(cFile & a_File, Byte * a_LocationRaw)
LOGWARNING("Failed to write chunk data!");
return false;
}
+
+ // Pad onto the next sector:
+ int NumPadding = a_LocationRaw[3] * 4096 - (m_CompressedChunkDataSize + 4);
+ ASSERT(NumPadding >= 0);
+ if ((NumPadding > 0) && (a_File.Write(g_Zeroes, NumPadding) != NumPadding))
+ {
+ LOGWARNING("Failed to write padding");
+ return false;
+ }
+
+ m_CurrentSectorOut += a_LocationRaw[3];
return true;
}
diff --git a/Tools/MCADefrag/MCADefrag.h b/Tools/MCADefrag/MCADefrag.h
index 0801d1b5d..ef527863d 100644
--- a/Tools/MCADefrag/MCADefrag.h
+++ b/Tools/MCADefrag/MCADefrag.h
@@ -47,10 +47,11 @@ protected:
/** The current compressed chunk data. Valid after a successful ReadChunk().
This contains only the compression method byte and the compressed data,
- but not the length preceding the data in the MCA file. */
+ but not the exact-length preceding the data in the MCA file. */
unsigned char m_CompressedChunkData[MAX_COMPRESSED_CHUNK_DATA_SIZE];
- /** Size of the actual current compressed chunk data. */
+ /** Size of the actual current compressed chunk data, excluding the 4 exact-length bytes.
+ This is the amount of bytes in m_CompressedChunkData[] that are valid. */
int m_CompressedChunkDataSize;
/** The current raw chunk data. Valid after a successful ReadChunk(), if recompression is active. */