Remove enum mqe_event and use u32 for queue events

We were using intermediate values int he enum and casting back and forth
with a u32; it is cleaner to just use a u32 and define some special
values.

Silences ICC warning #188: enumerated type mixed with another type.

src/nfa/lbr_common_impl.h

@@ -151,12 +151,12 @@ char JOIN(ENGINE_EXEC_NAME, _TopScan)(const struct NFA *nfa, struct mq *q,
     while (1) {
         // Find the next top with location >= the last escape we saw.
         for (; q->cur < q->end && q_cur_loc(q) <= end; q->cur++) {
-            enum mqe_event t = q_cur_type(q);
-            if ((t == MQE_TOP || t == MQE_TOP_FIRST) &&
+            u32 event = q_cur_type(q);
+            if ((event == MQE_TOP || event == MQE_TOP_FIRST) &&
                 q_cur_offset(q) >= lstate->lastEscape) {
                 goto found_top;
             }
-            DEBUG_PRINTF("skip event type=%d offset=%lld\n", t, q_cur_offset(q));
+            DEBUG_PRINTF("skip event type=%u offset=%lld\n", event, q_cur_offset(q));
         }
 
         // No more tops, we're done.

src/nfa/mpvcompile.cpp

@@ -250,7 +250,7 @@ void fillCounterInfos(vector<mpv_counter_info> *out, u32 *curr_decomp_offset,
                       const map<ClusterKey, vector<raw_puff>> &kilopuffs) {
     /* first the triggered puffs */
     map<ClusterKey, vector<raw_puff>>::const_iterator it = kilopuffs.begin();
-    while (it != kilopuffs.end() && it->first.trigger_event != ~0U) {
+    while (it != kilopuffs.end() && it->first.trigger_event != MQE_INVALID) {
         assert(!it->first.auto_restart);
         assert(it->first.trigger_event
                == MQE_TOP_FIRST + distance(kilopuffs.begin(), it));
@@ -268,7 +268,7 @@ void fillCounterInfos(vector<mpv_counter_info> *out, u32 *curr_decomp_offset,
      */
     map<ClusterKey, vector<raw_puff>>::const_iterator trig_ite = it;
     while (it != kilopuffs.end() && !it->first.auto_restart) {
-        assert(it->first.trigger_event == ~0U);
+        assert(it->first.trigger_event == MQE_INVALID);
 
         ++it;
     }
@@ -278,7 +278,7 @@ void fillCounterInfos(vector<mpv_counter_info> *out, u32 *curr_decomp_offset,
                         kilopuffs, kilopuffs.begin(), it);
     }
     while (it != kilopuffs.end() && it->first.auto_restart) {
-        assert(it->first.trigger_event == ~0U);
+        assert(it->first.trigger_event == MQE_INVALID);
 
         out->push_back(mpv_counter_info());
         map<ClusterKey, vector<raw_puff>>::const_iterator it_o = it;

src/nfa/nfa_api_queue.h

@@ -41,24 +41,28 @@ extern "C"
 #define MAX_MQE_LEN 10
 
 /** Queue events */
-enum mqe_event {
-    MQE_START = 0,       /**< and begin! Note: stateless engines will start from
-                          *  this location */
-    MQE_END = 1,         /**< stop scanning */
-    MQE_TOP = 2,         /**< enable start + start dot star */
-    MQE_TOP_FIRST = 4, /**< first event corresponding to a TOP _N_ */
 
-    /*
-     * Additional tops (in multi-top engines) use the event values from
-     * MQE_TOP_FIRST to something.
-     */
+/** Queue event: begin scanning. Note: stateless engines will start from this
+ * location. */
+#define MQE_START 0U
 
-    MQE_INVALID = ~0U
-};
+/** Queue event: stop scanning. */
+#define MQE_END 1U
+
+/** Queue event: enable start and start-dot-star. */
+#define MQE_TOP 2U
+
+/** Queue event: first event corresponding to a numbered TOP. Additional tops
+ * (in multi-top engines) use the event values from MQE_TOP_FIRST to
+ * MQE_INVALID - 1. */
+#define MQE_TOP_FIRST 4U
+
+/** Invalid queue event */
+#define MQE_INVALID (~0U)
 
 /** Queue item */
 struct mq_item {
-    u32 type; /**< event; from mqe_event */
+    u32 type; /**< event type, from MQE_* */
     s64a location; /**< relative to the start of the current buffer */
     u64a som; /**< pattern start-of-match corresponding to a top, only used
                * by som engines. */

src/rose/match.c

@@ -391,7 +391,7 @@ hwlmcb_rv_t roseHandleSuffixTrigger(const struct RoseEngine *t,
         }
     }
 
-    enum mqe_event top = tr->suffixEvent;
+    u32 top = tr->suffixEvent;
     assert(top == MQE_TOP || (top >= MQE_TOP_FIRST && top < MQE_INVALID));
     pushQueueSom(q, top, loc, som);
 
@@ -977,14 +977,14 @@ void roseTriggerInfixes(const struct RoseEngine *t, const struct RoseRole *tr,
     do {
         u32 qi = curr_r->queue;
         u32 ri = queueToLeftIndex(t, qi);
-        enum mqe_event topEvent = curr_r->event;
+        u32 topEvent = curr_r->event;
         u8 cancel = curr_r->cancel_prev_top;
         assert(topEvent < MQE_INVALID);
 
         const struct LeftNfaInfo *left = getLeftInfoByQueue(t, qi);
         assert(!left->transient);
 
-        DEBUG_PRINTF("rose %u (qi=%u) event %u\n", ri, qi, (u32)topEvent);
+        DEBUG_PRINTF("rose %u (qi=%u) event %u\n", ri, qi, topEvent);
 
         struct mq *q = tctxtToScratch(tctxt)->queues + qi;
         const struct NfaInfo *info = getNfaInfoByQueue(t, qi);

src/rose/rose_build_bytecode.cpp

@@ -2433,7 +2433,7 @@ vector<RoseTrigger> buildRoseTriggerList(const RoseGraph &g, RoseVertex u,
             assert(num_tops(g[v].left) == 1);
             top = MQE_TOP;
         } else {
-            top = (enum mqe_event)((u32)MQE_TOP_FIRST + g[e].rose_top);
+            top = MQE_TOP_FIRST + g[e].rose_top;
             assert(top < MQE_INVALID);
         }
 

src/rose/rose_internal.h

@@ -236,7 +236,7 @@ struct LeftNfaInfo {
 // A list of these is used to trigger prefix/infix roses.
 struct RoseTrigger {
     u32 queue; // queue index of leftfix
-    u32 event; // from enum mqe_event
+    u32 event; // queue event, from MQE_*
     u8 cancel_prev_top;
 };
 
@@ -309,7 +309,7 @@ struct RoseRole {
     ReportID reportId; // report ID, or MO_INVALID_IDX
     u32 stateIndex; /**< index into state multibit, or MMB_INVALID. Roles do not
                      * require a state bit if they are terminal */
-    u32 suffixEvent; // from enum mqe_event
+    u32 suffixEvent; // queue event, from MQE_
     u8 depth; /**< depth of this vertex from root in the tree, or 255 if greater.
                */
     u32 suffixOffset; /**< suffix nfa: 0 if no suffix associated with the role,