rose/hwlm: limit literals to eight bytes

Rework HWLM to work over literals of eight bytes ("medium length"),
doing confirm in the Rose interpreter.

src/hwlm/hwlm_build.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2015-2016, Intel Corporation
+ * Copyright (c) 2015-2017, Intel Corporation
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are met:
@@ -34,7 +34,6 @@
 #define HWLM_BUILD_H
 
 #include "hwlm.h"
-#include "hwlm_literal.h"
 #include "ue2common.h"
 #include "util/alloc.h"
 
@@ -47,30 +46,12 @@ namespace ue2 {
 
 struct CompileContext;
 struct Grey;
-struct target_t;
-
-/** \brief Structure gathering together the input/output parameters related to
- * streaming mode operation. */
-struct hwlmStreamingControl {
-    /** \brief IN parameter: Upper limit on the amount of history that can be
-     * requested. */
-    size_t history_max;
-
-    /** \brief IN parameter: History already known to be used before literal
-     * analysis. */
-    size_t history_min;
-
-    /** \brief OUT parameter: History required by the literal matcher to
-     * correctly match all literals. */
-    size_t literal_history_required;
-};
+struct hwlmLiteral;
 
 /** \brief Build an \ref HWLM literal matcher runtime structure for a group of
  * literals.
  *
  * \param lits The group of literals.
- * \param stream_control Streaming control parameters. If the matcher will
- *        operate in non-streaming (block) mode, this pointer should be NULL.
  * \param make_small Optimise matcher for small size.
  * \param cc Compile context.
  * \param expected_groups FIXME: document me!
@@ -80,8 +61,7 @@ struct hwlmStreamingControl {
  * thrown.
  */
 aligned_unique_ptr<HWLM>
-hwlmBuild(const std::vector<hwlmLiteral> &lits,
-          hwlmStreamingControl *stream_control, bool make_small,
+hwlmBuild(const std::vector<hwlmLiteral> &lits, bool make_small,
           const CompileContext &cc,
           hwlm_group_t expected_groups = HWLM_ALL_GROUPS);