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-rw-r--r--src/utils/util.cpp32
1 files changed, 0 insertions, 32 deletions
diff --git a/src/utils/util.cpp b/src/utils/util.cpp
index af1c62ebd..f8b98fcb8 100644
--- a/src/utils/util.cpp
+++ b/src/utils/util.cpp
@@ -64,36 +64,4 @@ u32bit dl_work_factor(u32bit bits)
#endif
}
-/*************************************************
-* Estimate the entropy of the buffer *
-*************************************************/
-u32bit entropy_estimate(const byte buffer[], u32bit length)
- {
- if(length <= 4)
- return 0;
-
- u32bit estimate = 0;
- byte last = 0, last_delta = 0, last_delta2 = 0;
-
- for(u32bit j = 0; j != length; ++j)
- {
- byte delta = last ^ buffer[j];
- last = buffer[j];
-
- byte delta2 = delta ^ last_delta;
- last_delta = delta;
-
- byte delta3 = delta2 ^ last_delta2;
- last_delta2 = delta2;
-
- byte min_delta = delta;
- if(min_delta > delta2) min_delta = delta2;
- if(min_delta > delta3) min_delta = delta3;
-
- estimate += hamming_weight(min_delta);
- }
-
- return (estimate / 2);
- }
-
}