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fix potential crashes in the reader.cxx

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This commit is contained in:
Krasimir Angelov
2023-01-27 15:07:31 +01:00
parent e7cd5cd3f2
commit 0e81dd7ada
1 changed files with 21 additions and 9 deletions
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30
src/runtime/c/pgf/reader.cxx
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@@ -666,12 +666,19 @@ PgfPhrasetable PgfReader::read_phrasetable()
ref<PgfConcrLincat> PgfReader::read_lincat()
{
ref<PgfConcrLincat> lincat = read_name(&PgfConcrLincat::name);
auto fields = read_lincat_fields(lincat);
auto n_lindefs = read_len();
auto args = read_vector(&PgfReader::read_parg);
auto res = read_vector(&PgfReader::read_presult2);
auto seqs = read_seq_ids(lincat.tagged());
lincat->abscat = namespace_lookup(abstract->cats, &lincat->name);
lincat->fields = read_lincat_fields(lincat);
lincat->n_lindefs = read_len();
lincat->args = read_vector(&PgfReader::read_parg);
lincat->res = read_vector(&PgfReader::read_presult2);
lincat->seqs = read_seq_ids(lincat.tagged());
lincat->fields = fields;
lincat->n_lindefs = n_lindefs;
lincat->args = args;
lincat->res = res;
lincat->seqs = seqs;
return lincat;
}
@@ -680,9 +687,11 @@ ref<Vector<PgfLincatField>> PgfReader::read_lincat_fields(ref<PgfConcrLincat> li
size_t len = read_len();
ref<Vector<PgfLincatField>> fields = vector_new<PgfLincatField>(len);
for (size_t i = 0; i < len; i++) {
auto name = read_text();
ref<PgfLincatField> field = vector_elem(fields,i);
field->lincat = lincat;
field->name = read_text();
field->name = name;
field->backrefs = 0;
field->epsilons = 0;
}
@@ -782,10 +791,13 @@ ref<PgfConcrLin> PgfReader::read_lin()
if (lin->absfun == 0)
throw pgf_error("Found a lin without a fun");
lin->args = read_vector(&PgfReader::read_parg);
lin->res = read_vector(&PgfReader::read_presult2);
lin->seqs = read_seq_ids(lin.tagged());
auto args = read_vector(&PgfReader::read_parg);
auto res = read_vector(&PgfReader::read_presult2);
auto seqs = read_seq_ids(lin.tagged());
lin->args = args;
lin->res = res;
lin->seqs = seqs;
lin->lincat =
namespace_lookup(concrete->lincats, &lin->absfun->type->name);
if (lin->lincat == 0)