Make benchmark compatible with dictionary compression

Support the -D command line option for running benchmarks. The
benchmark code was slightly restructured to factor out the calls
that need to be different for each benchmark scenario. Since there
are now 4 scenarios (all combinations of fast/HC and with/without
dictionary), the logic was getting somewhat convoluted otherwise.

This was done by extending the compressionParameters struct that
previously contained just a single function pointer. It now
contains 4 function pointers for init/reset/compress/cleanup,
with the related state. The functions get a pointer to the
structure as their first argument (inspired by C++), so that they
can access the state values in the struct.

1 files changed, 2 insertions, 1 deletions

diff --git a/programs/bench.h b/programs/bench.h
index bb67bee..22ebf60 100644
--- a/programs/bench.h
+++ b/programs/bench.h
@@ -26,7 +26,8 @@
 #include <stddef.h>
 
 int BMK_benchFiles(const char** fileNamesTable, unsigned nbFiles,
-                   int cLevel, int cLevelLast);
+                   int cLevel, int cLevelLast,
+                   const char* dictFileName);
 
 /* Set Parameters */
 void BMK_setNbSeconds(unsigned nbLoops);