get rid of the destructive updates for seq_ids

src/runtime/c/pgf/data.h

@@ -130,7 +130,6 @@ struct PGF_INTERNAL_DECL PgfPResult {
 typedef object PgfSymbol;
 
 struct PGF_INTERNAL_DECL PgfSequence {
-	size_t seq_id;
 	size_t ref_count;
 	Vector<PgfSymbol> syms;
 

src/runtime/c/pgf/pgf.cxx

@@ -827,16 +827,22 @@ void pgf_iter_lins(PgfDB *db, PgfConcrRevision cnc_revision,
 }
 
 PGF_API
-void pgf_iter_sequences(PgfDB *db, PgfConcrRevision cnc_revision,
-                        PgfSequenceItor *itor, PgfExn *err)
+PgfPhrasetableIds *pgf_iter_sequences(PgfDB *db, PgfConcrRevision cnc_revision,
+                                      PgfSequenceItor *itor, PgfExn *err)
 {
     PGF_API_BEGIN {
         DB_scope scope(db, READER_SCOPE);
         ref<PgfConcr> concr = PgfDB::revision2concr(cnc_revision);
 
-		size_t next_id = 0;
-        phrasetable_iter(concr->phrasetable, itor, &next_id, err);
+		PgfPhrasetableIds *seq_ids = new PgfPhrasetableIds();
+		seq_ids->start(concr);
+
+        phrasetable_iter(concr->phrasetable, itor, seq_ids, err);
+
+        return seq_ids;
     } PGF_API_END
+
+    return NULL;
 }
 
 PGF_API
@@ -863,7 +869,7 @@ size_t pgf_get_lin_get_prod_count(object o)
 }
 
 PGF_API
-PgfText *pgf_print_lindef_internal(object o, size_t i)
+PgfText *pgf_print_lindef_internal(PgfPhrasetableIds *seq_ids, object o, size_t i)
 {
     ref<PgfConcrLincat> lincat = o;
 
@@ -893,7 +899,7 @@ PgfText *pgf_print_lindef_internal(object o, size_t i)
 			printer.puts(",");
 
 		ref<PgfSequence> seq = *vector_elem(lincat->seqs, i*n_seqs + j);
-		printer.seq_id(seq->seq_id);
+		printer.seq_id(seq_ids, seq);
 	}
 
 	printer.puts("]");
@@ -902,7 +908,7 @@ PgfText *pgf_print_lindef_internal(object o, size_t i)
 }
 
 PGF_API
-PgfText *pgf_print_linref_internal(object o, size_t i)
+PgfText *pgf_print_linref_internal(PgfPhrasetableIds *seq_ids, object o, size_t i)
 {
     ref<PgfConcrLincat> lincat = o;
 
@@ -926,7 +932,7 @@ PgfText *pgf_print_linref_internal(object o, size_t i)
 
 	size_t n_seqs = lincat->fields->len;
 	ref<PgfSequence> seq = *vector_elem(lincat->seqs, lincat->n_lindefs*n_seqs+i);
-	printer.seq_id(seq->seq_id);
+	printer.seq_id(seq_ids, seq);
 
 	printer.puts("]");
 
@@ -934,7 +940,7 @@ PgfText *pgf_print_linref_internal(object o, size_t i)
 }
 
 PGF_API
-PgfText *pgf_print_lin_internal(object o, size_t i)
+PgfText *pgf_print_lin_internal(PgfPhrasetableIds *seq_ids, object o, size_t i)
 {
     ref<PgfConcrLin> lin = o;
     ref<PgfDTyp> ty = lin->absfun->type;
@@ -975,7 +981,7 @@ PgfText *pgf_print_lin_internal(object o, size_t i)
 			printer.puts(",");
 
 		ref<PgfSequence> seq = *vector_elem(lin->seqs, i*n_seqs + j);
-		printer.seq_id(seq->seq_id);
+		printer.seq_id(seq_ids, seq);
 	}
 
 	printer.puts("]");
@@ -984,20 +990,25 @@ PgfText *pgf_print_lin_internal(object o, size_t i)
 }
 
 PGF_API
-PgfText *pgf_print_sequence_internal(object o)
+PgfText *pgf_print_sequence_internal(size_t seq_id, object o)
 {
     ref<PgfSequence> seq = o;
 
     PgfInternalMarshaller m;
     PgfPrinter printer(NULL,0,&m);
 
-	printer.seq_id(seq->seq_id);
-	printer.puts(" = ");
+	printer.nprintf(10,"S%zu = ", seq_id);
 	printer.sequence(seq);
 
     return printer.get_text();
 }
 
+PGF_API_DECL
+void pgf_release_phrasetable_ids(PgfPhrasetableIds *seq_ids)
+{
+	delete seq_ids;
+}
+
 PGF_API
 void pgf_check_expr(PgfDB *db, PgfRevision revision,
                     PgfExpr* pe, PgfType ty,
@@ -1578,7 +1589,6 @@ public:
                 throw pgf_error(builder_error_msg);
 
 			seq = PgfDB::malloc<PgfSequence>(n_syms*sizeof(PgfSymbol));
-            seq->seq_id    = 0;
             seq->ref_count = 1;
             seq->syms.len  = n_syms;
 
@@ -1680,7 +1690,6 @@ public:
                 throw pgf_error(builder_error_msg);
 
 			ref<PgfSequence> def = PgfDB::malloc<PgfSequence>(n_syms*sizeof(PgfSymbol));
-            def->seq_id    = 0;
             def->ref_count = 1;
             def->syms.len  = n_syms;
 
@@ -1707,7 +1716,6 @@ public:
                 throw pgf_error(builder_error_msg);
 
 			ref<PgfSequence> form = PgfDB::malloc<PgfSequence>(n_syms*sizeof(PgfSymbol));
-            form->seq_id    = 0;
             form->ref_count = 1;
             form->syms.len  = n_syms;
 

src/runtime/c/pgf/pgf.h

@@ -396,14 +396,16 @@ PGF_API_DECL
 void pgf_iter_lins(PgfDB *db, PgfConcrRevision cnc_revision,
                    PgfItor *itor, PgfExn *err);
 
+typedef struct PgfPhrasetableIds PgfPhrasetableIds;
+
 typedef struct PgfSequenceItor PgfSequenceItor;
 struct PgfSequenceItor {
-	void (*fn)(PgfSequenceItor* self, object value, PgfExn *err);
+	void (*fn)(PgfSequenceItor* self, size_t seq_id, object value, PgfExn *err);
 };
 
 PGF_API
-void pgf_iter_sequences(PgfDB *db, PgfConcrRevision cnc_revision,
-                        PgfSequenceItor *itor, PgfExn *err);
+PgfPhrasetableIds *pgf_iter_sequences(PgfDB *db, PgfConcrRevision cnc_revision,
+                                      PgfSequenceItor *itor, PgfExn *err);
 
 PGF_API_DECL
 void pgf_get_lincat_counts_internal(object o, size_t *counts);
@@ -415,16 +417,19 @@ PGF_API_DECL
 size_t pgf_get_lin_get_prod_count(object o);
 
 PGF_API_DECL
-PgfText *pgf_print_lindef_internal(object o, size_t i);
+PgfText *pgf_print_lindef_internal(PgfPhrasetableIds *seq_ids, object o, size_t i);
 
 PGF_API_DECL
-PgfText *pgf_print_linref_internal(object o, size_t i);
+PgfText *pgf_print_linref_internal(PgfPhrasetableIds *seq_ids, object o, size_t i);
 
 PGF_API_DECL
-PgfText *pgf_print_lin_internal(object o, size_t i);
+PgfText *pgf_print_lin_internal(PgfPhrasetableIds *seq_ids, object o, size_t i);
 
 PGF_API_DECL
-PgfText *pgf_print_sequence_internal(object o);
+PgfText *pgf_print_sequence_internal(size_t seq_id, object o);
+
+PGF_API_DECL
+void pgf_release_phrasetable_ids(PgfPhrasetableIds *seq_ids);
 
 PGF_API_DECL
 void pgf_check_expr(PgfDB *db, PgfRevision revision,

src/runtime/c/pgf/phrasetable.cxx

@@ -1,5 +1,77 @@
 #include "data.h"
 
+PgfPhrasetableIds::PgfPhrasetableIds()
+{
+	next_id = 0;
+	n_pairs = 0;
+	pairs   = NULL;
+	chains  = NULL;
+}
+
+void PgfPhrasetableIds::start(ref<PgfConcr> concr)
+{
+	next_id = 0;
+	n_pairs = namespace_size(concr->phrasetable);
+	size_t mem_size = sizeof(SeqIdPair)*n_pairs;
+	pairs = (SeqIdPair*) malloc(mem_size);
+	if (pairs == NULL)
+		throw pgf_systemerror(ENOMEM);
+	memset(pairs, 0, mem_size);
+}
+
+size_t PgfPhrasetableIds::add(ref<PgfSequence> seq)
+{
+	size_t index = (seq.as_object() >> 4) % n_pairs;
+	if (pairs[index].seq == 0) {
+		pairs[index].seq = seq;
+		pairs[index].seq_id = next_id++;
+		return pairs[index].seq_id;
+	} else {
+		SeqIdChain *chain =
+			(SeqIdChain*) malloc(sizeof(SeqIdChain));
+		if (chain == NULL)
+			throw pgf_systemerror(ENOMEM);
+		chain->next   = chains;
+		chain->chain  = pairs[index].chain;
+		chain->seq    = seq;
+		chain->seq_id = next_id++;
+		pairs[index].chain = chain;
+		chains        = chain;
+		return chain->seq_id;
+	}
+}
+
+size_t PgfPhrasetableIds::get(ref<PgfSequence> seq)
+{
+	size_t index = (seq.as_object() >> 4) % n_pairs;
+	if (pairs[index].seq == seq) {
+		return pairs[index].seq_id;
+	} else {
+		SeqIdChain *chain = pairs[index].chain;
+		while (chain != NULL) {
+			if (chain->seq == seq)
+				return chain->seq_id;
+			chain = chain->chain;
+		}
+		throw pgf_error("Can't find sequence id");
+	}
+}
+
+void PgfPhrasetableIds::end()
+{
+	next_id = 0;
+	n_pairs = 0;
+	
+	while (chains != NULL) {
+		SeqIdChain *next = chains->next;
+		free(chains);
+		chains = next;
+	}
+
+	free(pairs);
+	pairs = NULL;
+}
+
 static
 int lparam_cmp(PgfLParam *p1, PgfLParam *p2)
 {
@@ -213,21 +285,22 @@ ref<PgfSequence> phrasetable_get(PgfPhrasetable table, size_t seq_id)
 }
 
 PGF_INTERNAL
-void phrasetable_iter(PgfPhrasetable table, PgfSequenceItor* itor, size_t *p_next_id, PgfExn *err)
+void phrasetable_iter(PgfPhrasetable table, PgfSequenceItor* itor,
+                      PgfPhrasetableIds *seq_ids, PgfExn *err)
 {
     if (table == 0)
         return;
 
-    phrasetable_iter(table->left, itor, p_next_id, err);
+    phrasetable_iter(table->left, itor, seq_ids, err);
     if (err->type != PGF_EXN_NONE)
         return;
 
-	table->value->seq_id = (*p_next_id)++;
-    itor->fn(itor, table->value.as_object(), err);
+	size_t seq_id = seq_ids->add(table->value);
+    itor->fn(itor, seq_id, table->value.as_object(), err);
     if (err->type != PGF_EXN_NONE)
         return;
 
-    phrasetable_iter(table->right, itor, p_next_id, err);
+    phrasetable_iter(table->right, itor, seq_ids, err);
     if (err->type != PGF_EXN_NONE)
         return;
 }

src/runtime/c/pgf/phrasetable.h

@@ -5,6 +5,41 @@ class PgfSequence;
 class PgfSequenceItor;
 typedef ref<Node<PgfSequence>> PgfPhrasetable;
 
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wattributes"
+
+struct PgfPhrasetableIds {
+public:
+	PGF_INTERNAL_DECL PgfPhrasetableIds();
+	PGF_INTERNAL_DECL ~PgfPhrasetableIds() { end(); }
+
+	PGF_INTERNAL_DECL void start(ref<PgfConcr> concr);
+	PGF_INTERNAL_DECL size_t add(ref<PgfSequence> seq);
+	PGF_INTERNAL_DECL size_t get(ref<PgfSequence> seq);
+	PGF_INTERNAL_DECL void end();
+
+private:
+	size_t next_id;
+
+	struct PGF_INTERNAL_DECL SeqIdChain;
+
+	struct PGF_INTERNAL_DECL SeqIdPair {
+		SeqIdChain *chain;
+		ref<PgfSequence> seq;
+		size_t seq_id;
+	};
+
+	struct PGF_INTERNAL_DECL SeqIdChain : public SeqIdPair {
+		SeqIdChain *next;
+	};
+
+	size_t n_pairs;
+	SeqIdPair  *pairs;
+	SeqIdChain *chains;
+};
+
+#pragma GCC diagnostic pop
+
 PGF_INTERNAL_DECL
 PgfPhrasetable phrasetable_internalize(PgfPhrasetable table, ref<PgfSequence> *seq);
 
@@ -12,7 +47,8 @@ PGF_INTERNAL_DECL
 ref<PgfSequence> phrasetable_get(PgfPhrasetable table, size_t seq_id);
 
 PGF_INTERNAL_DECL
-void phrasetable_iter(PgfPhrasetable table, PgfSequenceItor* itor, size_t *p_next_id, PgfExn *err);
+void phrasetable_iter(PgfPhrasetable table, PgfSequenceItor* itor,
+                      PgfPhrasetableIds *seq_ids, PgfExn *err);
 
 PGF_INTERNAL_DECL
 void phrasetable_release(PgfPhrasetable table);

src/runtime/c/pgf/printer.cxx

@@ -575,9 +575,9 @@ void PgfPrinter::sequence(ref<PgfSequence> seq)
     }
 }
 
-void PgfPrinter::seq_id(size_t seq_id)
+void PgfPrinter::seq_id(PgfPhrasetableIds *seq_ids, ref<PgfSequence> seq)
 {
-	nprintf(5, "S%zu", seq_id);
+	nprintf(5, "S%zu", seq_ids->get(seq));
 }
 
 void PgfPrinter::free_ref(object x)

src/runtime/c/pgf/printer.h

@@ -56,7 +56,7 @@ public:
     void lvar(size_t var);
     void lparam(ref<PgfLParam> lparam);
     void lvar_ranges(ref<Vector<PgfVariableRange>> vars);
-    void seq_id(size_t seqid);
+    void seq_id(PgfPhrasetableIds *seq_ids, ref<PgfSequence> seq);
     void symbol(PgfSymbol sym);
     void sequence(ref<PgfSequence> seq);
 

src/runtime/c/pgf/reader.cxx

@@ -565,7 +565,6 @@ ref<PgfSequence> PgfReader::read_seq()
 	size_t n_syms = read_len();
 
 	ref<PgfSequence> seq = PgfDB::malloc<PgfSequence>(n_syms*sizeof(PgfSymbol));
-    seq->seq_id    = 0;
     seq->ref_count = 1;
     seq->syms.len  = n_syms;
 

src/runtime/c/pgf/writer.cxx

@@ -414,7 +414,7 @@ void PgfWriter::write_symbol(PgfSymbol sym)
 
 void PgfWriter::write_seq(ref<PgfSequence> seq)
 {
-	seq->seq_id = next_seq_id++;
+	seq_ids.add(seq);
     write_vector(ref<Vector<PgfSymbol>>::from_ptr(&seq->syms), &PgfWriter::write_symbol);
 }
 
@@ -444,7 +444,7 @@ void PgfWriter::write_printname(ref<PgfConcrPrintname> printname)
 
 void PgfWriter::write_concrete(ref<PgfConcr> concr)
 {
-	next_seq_id = 0;
+	seq_ids.start(concr);
 
     write_name(&concr->name);
     write_namespace<PgfFlag>(concr->cflags, &PgfWriter::write_flag);
@@ -452,6 +452,8 @@ void PgfWriter::write_concrete(ref<PgfConcr> concr)
     write_namespace<PgfConcrLincat>(concr->lincats, &PgfWriter::write_lincat);
 	write_namespace<PgfConcrLin>(concr->lins, &PgfWriter::write_lin);
 	write_namespace<PgfConcrPrintname>(concr->printnames, &PgfWriter::write_printname);
+
+	seq_ids.end();
 }
 
 void PgfWriter::write_pgf(ref<PgfPGF> pgf)

src/runtime/c/pgf/writer.h

@@ -45,7 +45,7 @@ public:
     void write_presult(ref<PgfPResult> linres);
     void write_symbol(PgfSymbol sym);
     void write_seq(ref<PgfSequence> seq);
-    void write_seq_id(ref<ref<PgfSequence>> r) { write_len((*r)->seq_id); };
+    void write_seq_id(ref<ref<PgfSequence>> r) { write_len(seq_ids.get(*r)); };
     void write_lin(ref<PgfConcrLin> lin);
     void write_printname(ref<PgfConcrPrintname> printname);
 
@@ -62,10 +62,10 @@ private:
     void write_symbol(ref<PgfSymbol> r) { write_symbol(*r); };
     void write_presult(ref<ref<PgfPResult>> r) { write_presult(*r); };
 
-	size_t next_seq_id;
-	
     FILE *out;
+
     ref<PgfAbstr> abstract;
+    PgfPhrasetableIds seq_ids;
 };
 
 #endif