autfilt: return with exit code 1 if there is no match

* src/bin/autfilt.cc: Return with exit code 1 if no match found.
* src/tgbaalgos/are_isomorphic.cc,src/tgbatest/degenlskip.test
src/tgbatest/explpro2.test,src/tgbatest/explpro3.test
src/tgbatest/explpro4.test,src/tgbatest/explprod.test
src/tgbatest/neverclaimread.test, src/tgbatest/readsave.test
src/tgbatest/tripprod.test: Use exit status to check for output
emptiness instead of 'test -n'.
* src/tgbatest/isomorph.test: Simplify test.

src/bin/autfilt.cc

@@ -49,7 +49,10 @@
 
 static const char argp_program_doc[] ="\
 Convert, transform, and filter Büchi automata.\n\
-";
+Exit status:\n\
+  0  if some automata were output\n\
+  1  if no automata were output (no match)\n\
+  2  if any error has been reported";
 
 
 #define OPT_TGBA 1
@@ -151,6 +154,7 @@ static const struct argp_child children[] =
 
 static enum output_format { Dot, Lbtt, Lbtt_t, Spin, Spot, Stats, Hoa }
   format = Dot;
+static bool one_match = false;
 static const char* stats = "";
 static const char* hoa_opt = 0;
 static spot::option_map extra_options;
@@ -412,8 +416,8 @@ namespace
 
       auto aut = haut->aut;
 
-      // Do this first, because it is cheap and will help most
+      // Preprocessing.
-      // algorithms.
+
       if (opt_merge)
         {
           aut->merge_transitions();
@@ -421,12 +425,23 @@ namespace
             opt_are_isomorphic->merge_transitions();
         }
 
+      // Filters.
+
+      bool matched = true;
+
+      if (opt_isomorph)
+        matched &= !are_isomorphic(aut, opt_isomorph).empty();
+
+      one_match |= matched;
+
+      if (!matched)
+        return 0;
+
+      // Postprocessing.
+
       if (opt_product)
 	aut = spot::product(std::move(aut), opt_product);
 
-      if (opt_isomorph && are_isomorphic(aut, opt_isomorph).empty())
-        return 0;
-
       aut = post.run(aut, nullptr);
 
       if (randomize_st || randomize_tr)
@@ -534,5 +549,5 @@ main(int argc, char** argv)
     {
       error(2, 0, "%s", e.what());
     }
-  return 0;
+  return one_match ? 0 : 1;
 }

src/tgbaalgos/are_isomorphic.cc

@@ -73,15 +73,12 @@ namespace
     state2class_t state2class(a->num_states());
 
     for (auto& t: a->transitions())
-      {
-        if (!a->is_dead_transition(t))
       {
         hashout[t.src] ^= spot::wang32_hash(t.cond.id());
         hashout[t.src] ^= spot::wang32_hash(t.acc);
         hashin[t.dst] ^= spot::wang32_hash(t.cond.id());
         hashin[t.dst] ^= spot::wang32_hash(t.acc);
       }
-      }
 
     for (unsigned i = 0; i < a->num_states(); ++i)
       // Rehash the ingoing transitions so that the total hash differs for
@@ -147,11 +144,9 @@ namespace
     std::vector<trans_storage_t> trans2;
 
     for (auto& t: a1->transitions())
-      if (!(a1->is_dead_transition(t)))
       trans1.push_back(t);
 
     for (auto& t: a2->transitions())
-      if (!(a2->is_dead_transition(t)))
       trans2.push_back(t);
 
     // Sort the vectors of transitions so that they can be compared.

src/tgbatest/degenlskip.test

@@ -78,5 +78,5 @@ State: 2
 --END--
 EOF
 
-test -n "`../../bin/autfilt -F out2 --isomorph expected2`"
+run 0 ../../bin/autfilt -F out2 --isomorph expected2
-test -n "`../../bin/autfilt -F out3 --isomorph expected3`"
+run 0 ../../bin/autfilt -F out3 --isomorph expected3

src/tgbatest/explpro2.test

@@ -78,6 +78,6 @@ State: 2
 EOF
 
 run 0 ../../bin/autfilt input1 --product input2 --hoa | tee stdout
-test -n "`../../bin/autfilt -F stdout --isomorph expected`"
+run 0 ../../bin/autfilt -F stdout --isomorph expected
 
 rm input1 input2 stdout expected

src/tgbatest/explpro3.test

@@ -78,5 +78,5 @@ State: 2
 EOF
 
 run 0 ../../bin/autfilt input1 --product input2 --hoa | tee stdout
-test -n "`../../bin/autfilt -F stdout --isomorph expected`"
+run 0 ../../bin/autfilt -F stdout --isomorph expected
 rm input1 input2 stdout expected

src/tgbatest/explpro4.test

@@ -72,6 +72,6 @@ State: 0
 EOF
 
 run 0 ../../bin/autfilt input1 --product input2 --hoa | tee stdout
-test -n "`../../bin/autfilt -F stdout --isomorph expected`"
+run 0 ../../bin/autfilt -F stdout --isomorph expected
 
 rm input1 input2 stdout expected

src/tgbatest/explprod.test

@@ -97,6 +97,6 @@ State: 0
 EOF
 
 run 0 ../../bin/autfilt input1 --product input2 --hoa --small | tee stdout
-test -n "`../../bin/autfilt -F stdout --isomorph expected`"
+run 0 ../../bin/autfilt -F stdout --isomorph expected
 
 rm input1 input2 stdout expected

src/tgbatest/isomorph.test

@@ -21,116 +21,14 @@
 
 . ./defs
 
-set -e
+for i in `seq 0 4`; do
+  ../../bin/randaut a --seed=$i -S4 --hoa >iso$i
+  ../../bin/autfilt -F iso$i --randomize --hoa >aut$i
+done
 
-../../bin/randaut a b -S10 --hoa >filt
+for i in `seq 0 4`; do
-
+  for j in `seq 0 4`; do
-randomize()
+    exp=$(test $i -eq $j; echo $?)
-{
+    run $exp ../../bin/autfilt -F aut$i -I iso$j
-  for i in `seq 1 5`
-  do
-    ../../bin/autfilt --seed=$i --randomize=$1 -F filt --hoa >> autiso
   done
-}
+done
-
-randomize s
-randomize t
-randomize
-
-run 0 ../../bin/autfilt -F autiso --isomorph filt --hoa >out
-test `grep HOA out | wc -l` -eq 15
-
-cat >notiso <<EOF
-HOA: v1
-States: 10
-Start: 0
-AP: 2 "a" "b"
-acc-name: all
-Acceptance: 0 t
-properties: trans-labels explicit-labels state-acc
---BODY--
-State: 0
-[!0&1] 1
-[0&1] 2
-State: 1
-[!0&!1] 2
-[0&!1] 3
-[!0&1] 4
-State: 2
-[0&1] 5
-[0&!1] 1
-State: 3
-[!0&!1] 5
-[!0&!1] 1
-[!0&1] 0
-[0&!1] 6
-State: 4
-[0&1] 5
-[0&1] 0
-[!0&1] 7
-State: 5
-[0&1] 5
-[!0&1] 8
-State: 6
-[0&1] 9
-State: 7
-[0&!1] 9
-[0&1] 1
-State: 8
-[!0&1] 8
-[0&!1] 5
-State: 9
-[!0&!1] 5
-[!0&1] 8
---END--
-EOF
-
-cat >>notiso <<EOF
-HOA: v1
-States: 10
-Start: 0
-AP: 2 "a" "b"
-acc-name: all
-Acceptance: 0 t
-properties: trans-labels explicit-labels state-acc
---BODY--
-State: 0
-[!0&1] 1
-State: 1
-[!0&1] 2
-[!0&1] 3
-[!0&1] 4
-[!0&1] 5
-[!0&1] 6
-State: 2
-[0&1] 7
-[!0&1] 0
-State: 3
-[!0&!1] 0
-[!0&1] 6
-[0&!1] 8
-State: 4
-[!0&1] 3
-[!0&!1] 9
-[!0&!1] 0
-State: 5
-[0&1] 0
-State: 6
-[!0&!1] 9
-State: 7
-[0&!1] 0
-[!0&1] 7
-[!0&!1] 6
-State: 8
-[0&1] 6
-[!0&!1] 1
-[!0&!1] 0
-State: 9
-[0&!1] 7
-[!0&1] 2
-[0&1] 1
---END--
-EOF
-
-run 0 ../../bin/autfilt -F notiso --isomorph filt --hoa >out
-test `grep HOA out | wc -l` -eq 0 || exit 1

src/tgbatest/neverclaimread.test

@@ -67,7 +67,7 @@ State: 2 {0}
 --END--
 EOF
 
-test -n "`../../bin/autfilt -F stdout --isomorph expected`"
+run 0 ../../bin/autfilt -F stdout --isomorph expected
 
 rm input stdout expected
 
@@ -112,7 +112,7 @@ State: 2 {0}
 --END--
 EOF
 
-test -n "`../../bin/autfilt -F stdout --isomorph expected`"
+run 0 ../../bin/autfilt -F stdout --isomorph expected
 
 rm input stdout expected
 

src/tgbatest/readsave.test

@@ -90,14 +90,14 @@ EOF
 
 run 0 ../../bin/autfilt --merge-transitions --hoa input > stdout
 cat stdout
-test -n "`../../bin/autfilt -F stdout --isomorph expected`"
+run 0 ../../bin/autfilt -F stdout --isomorph expected
 
 # Likewise, with a randomly generated TGBA.
 run 0 ../../bin/randaut -S 20 a b -d 0.2 -a 0.2 -A 2 --hoa | tee input
 
 # the first read-write can renumber the states
 run 0 $autfilt --hoa --merge-transitions input > stdout
-test -n "`../../bin/autfilt -F input --isomorph stdout`"
+run 0 ../../bin/autfilt -F input --isomorph stdout
 
 # But this second output should be the same as the first
 run 0 $autfilt --hoa stdout > stdout2

src/tgbatest/tripprod.test

@@ -107,6 +107,6 @@ EOF
 run 0 ../../bin/autfilt input1 --product input2 --product input3 --hoa |
     tee stdout
 
-test -n "`../../bin/autfilt -F stdout --isomorph expected`"
+run 0 ../../bin/autfilt -F stdout --isomorph expected
 
 rm input1 input2 input3 stdout expected