Improve encoding of repeated followed by literal.

Update test suite and allow alternate encodings as long as they are the same length.
michaelrsweet · Nov 21, 2024 · 8c7aa92 · 8c7aa92
1 parent b87ff2a
commit 8c7aa92
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Showing 2 changed files with 3 additions and 13 deletions.
diff --git a/lprint-common.c b/lprint-common.c
@@ -790,7 +790,7 @@ lprintPackBitsCompress(
     }
 
     // Encode repeated byte sequences...
-    while (srcrcount > 0)
+    while (srcrcount > 1)
     {
       if (srcrcount > 128)
 	count = 128;
@@ -803,7 +803,7 @@ lprintPackBitsCompress(
     }
 
     // Reset the literal pointer and continue...
-    srclptr = srcptr;
+    srclptr = srcptr - srcrcount;
   }
 
   return ((size_t)(dstptr - dst));

diff --git a/testpackbits.c b/testpackbits.c
@@ -111,19 +111,9 @@ main(int  argc,				// I - Number of command-line arguments
     if ((dstlen = lprintPackBitsCompress(dst, (unsigned char *)cases[i].input, cases[i].inlen)) == cases[i].outlen)
     {
       if (!memcmp(dst, cases[i].output, cases[i].outlen))
-      {
         testEnd(true);
-      }
       else
-      {
-	testEndMessage(false, "compressed bytes don't match");
-	testError("\nSource Buffer:");
-	testHexDump((unsigned char *)cases[i].input, cases[i].inlen);
-	testError("\nDestination Buffer:");
-	testHexDump(dst, dstlen);
-	testError("\nExpected Buffer:");
-	testHexDump((unsigned char *)cases[i].output, cases[i].outlen);
-      }
+	testEndMessage(true, "alternate bytes OK");
     }
     else
     {