From 75111610a64fdc06504641469df2192584435dbb Mon Sep 17 00:00:00 2001
From: Bob Harris <rsharris@bx.psu.edu>
Date: Mon, 22 Jul 2019 12:01:38 -0400
Subject: [PATCH] (had more trouble with push) set fields so that callers can
 inspect the state of the hasher

---
 sabuhash.h | 19 +++++++++++++++++--
 1 file changed, 17 insertions(+), 2 deletions(-)

diff --git a/sabuhash.h b/sabuhash.h
index 01b07e1..496ecdc 100644
--- a/sabuhash.h
+++ b/sabuhash.h
@@ -204,6 +204,8 @@ class SabuHash
 			hF = forward(hF) ^ kernelTable[chIn];
 			}
 
+		hForward = hF;
+
 		hF = avalanche(hF);
 		if (hF == 0) return 1;
 		        else return hF;
@@ -224,6 +226,8 @@ class SabuHash
 			hF = forward(hF) ^ kernelTable[chIn];
 			}
 
+		hForward = hF;
+
 		hF = avalanche(hF);
 		if (hF == 0) return 1;
 		        else return hF;
@@ -246,6 +250,8 @@ class SabuHash
 			hF = backward(hF ^ forwardByK2[twoBits]);
 			}
 
+		hForward = hF;
+
 		hF = avalanche(hF);
 		if (hF == 0) return 1;
 		        else return hF;
@@ -253,7 +259,7 @@ class SabuHash
 
 	inline std::uint64_t rolling_hash
 	   (const unsigned char chIn,
-		const unsigned char chOut=0)
+		const unsigned char chOut=0)  // this was chIn k characters earlier
 		{
 		// note that we return 0 iff we don't yet have k characters
 
@@ -493,6 +499,9 @@ class SabuHashCanonical
 			hR = SabuHash::backward(hR ^ forwardByK_RC[chIn]);
 			}
 
+		hForward = hF;
+		hRevComp = hR;
+
 		std::uint64_t h = SabuHash::avalanche(hF+hR);
 		if (h == 0) return 1;
 		       else return h;
@@ -515,6 +524,9 @@ class SabuHashCanonical
 			hR = SabuHash::backward(hR ^ forwardByK_RC[chIn]);
 			}
 
+		hForward = hF;
+		hRevComp = hR;
+
 		std::uint64_t h = SabuHash::avalanche(hF+hR);
 		if (h == 0) return 1;
 		       else return h;
@@ -537,6 +549,9 @@ class SabuHashCanonical
 			hR = SabuHash::forward(hR) ^ kernelTable2_RC[twoBits];
 			}
 
+		hForward = hF;
+		hRevComp = hR;
+
 		std::uint64_t h = SabuHash::avalanche(hF+hR);
 		if (h == 0) return 1;
 		       else return h;
@@ -544,7 +559,7 @@ class SabuHashCanonical
 
 	inline std::uint64_t rolling_hash
 	   (const unsigned char chIn,
-		const unsigned char chOut=0)
+		const unsigned char chOut=0)  // this was chIn k characters earlier
 		{
 		// note that we return 0 iff we don't yet have k characters