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Prevent crash due to huge number of possible paths through parse stack

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This commit is contained in:
Max Brunsfeld 2017-02-20 14:34:10 -08:00
parent ce5b3e8284
commit df520635c6
5 changed files with 72 additions and 12 deletions
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26
src/runtime/tree.c
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@ -301,6 +301,21 @@ bool ts_tree_eq(const Tree *self, const Tree *other) {
return true;
}
bool ts_tree_tokens_eq(const Tree *self, const Tree *other) {
if (self->child_count > 0 || other->child_count > 0) return false;
if (self->symbol != other->symbol) return false;
if (self->padding.bytes != other->padding.bytes) return false;
if (self->size.bytes != other->size.bytes) return false;
if (self->extra != other->extra) return false;
if (self->has_external_token_state) {
if (!other->has_external_token_state) return false;
if (!ts_external_token_state_eq(&self->external_token_state, &other->external_token_state)) return false;
} else {
if (other->has_external_token_state) return false;
}
return true;
}
int ts_tree_compare(const Tree *left, const Tree *right) {
if (left->symbol < right->symbol)
return -1;
@ -523,3 +538,14 @@ void ts_tree_print_dot_graph(const Tree *self, const TSLanguage *language,
ts_tree__print_dot_graph(self, 0, language, f);
fprintf(f, "}\n");
}
bool ts_external_token_state_eq(const TSExternalTokenState *self,
const TSExternalTokenState *other) {
if (self == other) {
return true;
} else if (!self || !other) {
return false;
} else {
return memcmp(self, other, sizeof(TSExternalTokenState)) == 0;
}
}