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allow outfixes to be converted to prefixes of the eod event literal

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Alex Coyte 2017-01-11 14:38:18 +11:00 committed by Matthew Barr
parent 512c049493
commit 9d35e2ad36
1 changed files with 61 additions and 0 deletions
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61
src/rose/rose_build_add.cpp
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@ -1783,9 +1783,70 @@ void populateOutfixInfo(OutfixInfo &outfix, const NGHolder &h,
populateReverseAccelerationInfo(outfix.rev_info, h);
}
static
bool addEodOutfix(RoseBuildImpl &build, const NGHolder &h) {
map<flat_set<ReportID>, ReportID> report_remap;
shared_ptr<NGHolder> eod_leftfix
= makeRoseEodPrefix(h, build, report_remap);
bool nfa_ok = isImplementableNFA(h, &build.rm, build.cc);
/* TODO: check if early dfa is possible */
if (!nfa_ok) {
DEBUG_PRINTF("could not build as NFA\n");
return false;
}
u32 eod_event = getEodEventID(build);
auto &g = build.g;
for (const auto &report_mapping : report_remap) {
RoseVertex v = add_vertex(g);
g[v].literals.insert(eod_event);
build.literal_info[eod_event].vertices.insert(v);
g[v].left.graph = eod_leftfix;
g[v].left.leftfix_report = report_mapping.second;
g[v].left.lag = 0;
RoseEdge e1 = add_edge(build.anchored_root, v, g);
g[e1].minBound = 0;
g[e1].maxBound = ROSE_BOUND_INF;
g[v].min_offset = findMinWidth(*eod_leftfix);
g[v].max_offset = ROSE_BOUND_INF;
depth max_width = findMaxWidth(*g[v].left.graph);
if (max_width.is_finite() && isPureAnchored(*eod_leftfix)) {
g[e1].maxBound = max_width;
g[v].max_offset = max_width;
}
g[e1].history = ROSE_ROLE_HISTORY_NONE; // handled by prefix
RoseVertex w = add_vertex(g);
g[w].eod_accept = true;
g[w].reports = report_mapping.first;
g[w].min_offset = g[v].min_offset;
g[w].max_offset = g[v].max_offset;
RoseEdge e = add_edge(v, w, g);
g[e].minBound = 0;
g[e].maxBound = 0;
g[e].history = ROSE_ROLE_HISTORY_NONE;
DEBUG_PRINTF("accept eod vertex (index=%zu)\n", g[w].index);
}
return true;
}
bool RoseBuildImpl::addOutfix(const NGHolder &h) {
DEBUG_PRINTF("%zu vertices, %zu edges\n", num_vertices(h), num_edges(h));
/* TODO: handle more than one report */
if (!in_degree(h.accept, h)
&& all_reports(h).size() == 1
&& addEodOutfix(*this, h)) {
return true;
}
const u32 nfa_states = isImplementableNFA(h, &rm, cc);
if (nfa_states) {
DEBUG_PRINTF("implementable as an NFA in %u states\n", nfa_states);