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| 1 | /// <summary> | |
| 2 | /// Byte array to be used by FindPattern | |
| 3 | /// </summary> | |
| 4 | private static byte[] _file; | |
| 5 | /// <summary> | |
| 6 | /// Finds a specific pattern in a byte array | |
| 7 | /// </summary> | |
| 8 | /// <param name="btPattern">Byte array containing pattern to search</param> | |
| 9 | /// <param name="strMask">x for exact match, ? for wildcard</param> | |
| 10 | /// <returns>Position of pattern in _file, -1 if pattern not found</returns> | |
| 11 | public static int FindPattern(byte[] btPattern, string strMask) | |
| 12 | {
| |
| 13 | try | |
| 14 | {
| |
| 15 | if (strMask.Length != btPattern.Length) | |
| 16 | return -1; | |
| 17 | for (int x = 0; x < _file.Length; x++) | |
| 18 | {
| |
| 19 | if (MaskCheck(x, btPattern, strMask)) | |
| 20 | {
| |
| 21 | return x; | |
| 22 | } | |
| 23 | } | |
| 24 | return -1; | |
| 25 | - | for (int x = 0; x < btPattern.Length; x++) |
| 25 | + | |
| 26 | catch (Exception ex) | |
| 27 | - | if (strMask[x] == '?') |
| 27 | + | |
| 28 | - | continue; |
| 28 | + | |
| 29 | } | |
| 30 | - | if ((strMask[x] == 'x') && (btPattern[x] != _file[nOffset + x])) |
| 30 | + | |
| 31 | - | return false; |
| 31 | + | |
| 32 | private static bool MaskCheck(int nOffset, byte[] btPattern, string strMask) | |
| 33 | - | return true; |
| 33 | + | |
| 34 | return !btPattern.Where((t, x) => strMask[x] != '?' && ((strMask[x] == 'x') && (t != _file[nOffset + x]))).Any(); | |
| 35 | } |
