Initialize everything explicitly in parser

lib/parser.c

@@ -55,6 +55,8 @@ static int parse_class(const char *input, int rem, class_t *out)
 	if (used < rem && '^' == input[used]) {
 		out->negated = true;
 		++used;
+	} else {
+		out->negated = false;
 	}
 
 	out->count = 0;
@@ -139,6 +141,8 @@ static int parse_term(const char *input, int rem, term_t *out)
 		default:
 			out->quantifier = QUANTIFIER_NONE;
 		}
+	} else {
+		out->quantifier = QUANTIFIER_NONE;
 	}
 
 	return used;
@@ -150,7 +154,7 @@ static int parse_sequence(const char *input, int rem, sequence_t *out)
 
 	out->len = 0;
 	out->capacity = SEQUENCE_START_CAPACITY;
-	out->contents = calloc(out->capacity, sizeof(term_t));
+	out->contents = malloc(out->capacity * sizeof(term_t));
 	if (NULL == out->contents)
 		return -1;
 
@@ -186,13 +190,15 @@ int parse_regex(const char *input, int rem, regex_t *out)
 	if (used < rem && '|' == input[used]) {
 		++used;
 
-		out->alternative = calloc(1, sizeof(regex_t));
+		out->alternative = malloc(sizeof(regex_t));
 		if (NULL == out->alternative)
 			return -1;
 		result = parse_regex(input + used, rem - used, out->alternative);
 		if (result < 0)
 			return -1;
 		used += result;
+	} else {
+		out->alternative = NULL;
 	}
 
 	return used;