本文整理汇总了C#中IByteReader.SetFileMarker方法的典型用法代码示例。如果您正苦于以下问题:C# IByteReader.SetFileMarker方法的具体用法?C# IByteReader.SetFileMarker怎么用?C# IByteReader.SetFileMarker使用的例子?那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类IByteReader
的用法示例。
在下文中一共展示了IByteReader.SetFileMarker方法的3个代码示例,这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞,您的评价将有助于系统推荐出更棒的C#代码示例。
示例1: isFileCompliant
//public int getMaxOffset() { return MaxOffset; }
/**
* checks whether the binary file specified by targetFile is compliant
* with this byte sequence
*
* @param targetFile The binary file to be identified
*/
public bool isFileCompliant(IByteReader targetFile)
{
//System.out.println("Looking at new byte sequence with reference "+Reference);
//initialise variables and start with the file marker at the beginning of the file
bool isCompliant = true;
bool reverseOrder = (string.Compare(getReference(), "EOFoffset", true) == 0) ? true : false; //(getReference().equalsIgnoreCase("EOFoffset")) ? true : false;
int ssLoopStart = reverseOrder ? getNumSubSequences() - 1 : 0;
int ssLoopEnd = reverseOrder ? -1 : getNumSubSequences();
int searchDirection = reverseOrder ? -1 : 1;
if (reverseOrder)
{
targetFile.SetFileMarker(targetFile.GetNumberOfBytes() - 1L);
}
else
{
targetFile.SetFileMarker(0L);
}
//check whether each subsequence in turn is compliant
for (int iSS = ssLoopStart; (searchDirection * iSS < searchDirection * ssLoopEnd) & isCompliant; iSS += searchDirection)
{
bool isFixedStart = ((string.Compare(getReference(), "EOFoffset", true) == 0) || (string.Compare(getReference(), "BOFoffset", true) == 0)) ? true : false; //getReference().equalsIgnoreCase("EOFoffset") || getReference().equalsIgnoreCase("BOFoffset");
if ((iSS == ssLoopStart) && (isFixedStart))
{
isCompliant = getSubSequence(iSS).isFoundAtStartOfFile(targetFile, reverseOrder, bigEndian); //, MaxOffset);
}
else
{
isCompliant = getSubSequence(iSS).isFoundAfterFileMarker(targetFile, reverseOrder, bigEndian);
}
}
return isCompliant;
}
示例2: isFoundAtStartOfFile
//.........这里部分代码省略.........
//check the startPosInFile array: remove -2 values, reorder and remove duplicates
System.Array.Sort(startPosInFile, 0, numOptions);
int newNumOptions2 = 0;
long[] newStartPosInFile2 = new long[numOptions];
if (numOptions > 0)
{
if (startPosInFile[0] >= -1L)
{
newStartPosInFile2[0] = startPosInFile[0];
newNumOptions2 = 1;
}
}
for (int i = 1; i < numOptions; i++)
{
if (startPosInFile[i] > startPosInFile[i - 1])
{
newStartPosInFile2[newNumOptions2] = startPosInFile[i];
newNumOptions2++;
}
}
if (newNumOptions2 == 0)
{
subseqFound = false;
}
else
{
numOptions = newNumOptions2;
if (searchDirection < 0)
{
//for right to left search direction, reorder in reverse
for (int iOption = 0; iOption < numOptions; iOption++)
{
startPosInFile[iOption] = newStartPosInFile2[numOptions - 1 - iOption];
}
}
else
{
//for left to right search direction, copy over as is
System.Array.Copy(newStartPosInFile2, 0, startPosInFile, 0, numOptions);
}
}
}
//match remaining sequence fragment
long newValueStartPosInFile = 0L;
if (subseqFound)
{
long[] newArrayStartPosInFile;
if (reverseOrder)
{
int i = 0;
subseqFound = false;
while (i < numOptions && !subseqFound)
{
newArrayStartPosInFile = bytePosForLeftFragments(targetFile, 0L, startPosInFile[i], -1, 0, bigEndian);
if (newArrayStartPosInFile.Length == 0)
{
subseqFound = false;
}
else
{
subseqFound = true;
newValueStartPosInFile = newArrayStartPosInFile[0] - 1L; //take away -1???
}
i++;
}
}
else
{
int i = 0;
subseqFound = false;
while (i < numOptions && !subseqFound)
{
newArrayStartPosInFile = bytePosForRightFragments(targetFile, startPosInFile[i], targetFile.GetNumberOfBytes() - 1L, 1, 0, bigEndian);
if (newArrayStartPosInFile.Length == 0)
{
subseqFound = false;
}
else
{
subseqFound = true;
newValueStartPosInFile = newArrayStartPosInFile[0] + 1L; //take away +1????
}
i++;
}
}
}
//update the file marker
if (subseqFound)
{
targetFile.SetFileMarker(newValueStartPosInFile);
}
return subseqFound;
}
示例3: isFoundAfterFileMarker
/**
* Searches for this subsequence after the current file marker position in the file.
* Moves the file marker to the end of this subsequence.
*
* @param targetFile the binary file to be identified
* @param reverseOrder true if file is being searched from right to left
* @param bigEndian True iff our parent signature is big-endian
*/
public bool isFoundAfterFileMarker(IByteReader targetFile, bool reverseOrder, bool bigEndian) {
int searchDirection = reverseOrder?-1:1;
//get the current file marker
long startPosInFile = targetFile.GetFileMarker();
//Add the minimum offset before start of sequence and update the file marker accordingly
startPosInFile = startPosInFile + (long)(searchDirection * this.getMinSeqOffset());
if (targetFile.GetNumberOfBytes() < startPosInFile)
{
// We're looking for a sequence of bytes at an offset which is longer than the file itself
return false;
}
targetFile.SetFileMarker(startPosInFile);
//start searching for main sequence after the minimum length of the relevant fragments
startPosInFile = startPosInFile + (long)(searchDirection * this.getMinFragLength());
long numFileBytes = reverseOrder?(startPosInFile+1):(targetFile.GetNumberOfBytes() - startPosInFile);
int numSeqBytes = this.getNumBytes();
bool subSeqFound = false;
bool endOfFileReached = false;
while((!subSeqFound) & (!endOfFileReached)) {
if((long)numSeqBytes> numFileBytes) {
endOfFileReached = true;
} else {
//compare sequence with file contents directly at fileMarker position
bool missMatchFound = false;
int byteLoopStart = reverseOrder?numSeqBytes-1:0;
int byteLoopEnd = reverseOrder?0:numSeqBytes-1;
long tempFileMarker = startPosInFile;
for(int iByte=byteLoopStart; (!missMatchFound) && (iByte<=numSeqBytes-1) && (iByte>=0); iByte+=searchDirection) {
missMatchFound = (byteSequence[iByte] != targetFile.GetByte(tempFileMarker));
if(!missMatchFound && showProgress) { System.Console.WriteLine("FLOATING SEQ: A match was found for " + this.getByte(iByte).ToString()); }
tempFileMarker+=searchDirection;
}
if(!missMatchFound) { //subsequence was found at position fileMarker in the file
//Now search for fragments between original fileMarker and startPosInFile
if(reverseOrder) {
long rightFragEnd;
long[] rightFragEndArray = bytePosForRightFragments(targetFile, startPosInFile+1, targetFile.GetFileMarker(), 1, 0, bigEndian);
if(rightFragEndArray.Length == 0) {
missMatchFound = true;
} else {
rightFragEnd = rightFragEndArray[0];
long leftFragEnd;
long[] leftFragEndArray = bytePosForLeftFragments(targetFile, 0, startPosInFile - numSeqBytes, -1, 0, bigEndian);
if(leftFragEndArray.Length == 0) {
missMatchFound = true;
} else {
leftFragEnd = leftFragEndArray[0];
targetFile.SetFileMarker(leftFragEnd-1L);
subSeqFound = true;
}
}
} else { //search is in forward direction
long leftFragEnd;
long[] leftFragEndArray = bytePosForLeftFragments(targetFile, targetFile.GetFileMarker(), startPosInFile-1L, -1, 0, bigEndian);
if(leftFragEndArray.Length == 0) {
missMatchFound = true;
} else {
leftFragEnd = leftFragEndArray[0];
long rightFragEnd;
long[] rightFragEndArray = bytePosForRightFragments(targetFile, startPosInFile + numSeqBytes, targetFile.GetNumberOfBytes()-1L, 1, 0, bigEndian);
if(rightFragEndArray.Length == 0) {
missMatchFound = true;
} else {
rightFragEnd = rightFragEndArray[0];
targetFile.SetFileMarker(rightFragEnd+1L);
subSeqFound = true;
}
}
}
}
if(missMatchFound) {
if (startPosInFile+(long)(searchDirection*numSeqBytes)>=targetFile.GetNumberOfBytes()) {
endOfFileReached = true;
} else {
long numShiftBytes = this.getShift(targetFile.GetByte(startPosInFile+(long)(searchDirection*numSeqBytes))); //reverseOrder?-1:1; // add shift function for the byte at [fileMarker+(searchDirection*numSeqBytes)] in file
numFileBytes -= (numShiftBytes>0)?numShiftBytes:-numShiftBytes;
startPosInFile += numShiftBytes;
if((startPosInFile<0L) || (startPosInFile>=targetFile.GetNumberOfBytes())) {
endOfFileReached = true;
}
}
}
}
}
return subSeqFound;
}