[utils] adding cstring_array_extend and string_tree_clear

src/string_utils.c

@@ -1110,6 +1110,18 @@ cstring_array *cstring_array_from_strings(char **strings, size_t n) {
     return array;
 }
 
+bool cstring_array_extend(cstring_array *array, cstring_array *other) {
+    if (array == NULL || other == NULL) return false;
+    size_t n = cstring_array_num_strings(other);
+
+    for (size_t i = 0; i < n; i++) {
+        char *s_i = cstring_array_get_string(other, i);
+        cstring_array_add_string(array, s_i);
+    }
+    return true;
+}
+
+
 inline size_t cstring_array_capacity(cstring_array *self) {
     return self->str->m;
 }
@@ -1318,6 +1330,12 @@ inline void string_tree_finalize_token(string_tree_t *self) {
     uint32_array_push(self->token_indices, (uint32_t)cstring_array_num_strings(self->strings));
 }
 
+void string_tree_clear(string_tree_t *self) {
+    uint32_array_clear(self->token_indices);
+    uint32_array_push(self->token_indices, 0);
+    cstring_array_clear(self->strings);
+}
+
 // terminated
 inline void string_tree_add_string(string_tree_t *self, char *str) {
     cstring_array_add_string(self->strings, str);

src/string_utils.h

@@ -208,6 +208,8 @@ void cstring_array_clear(cstring_array *self);
 cstring_array *cstring_array_from_char_array(char_array *str);
 cstring_array *cstring_array_from_strings(char **strings, size_t n);
 
+bool cstring_array_extend(cstring_array *array, cstring_array *other);
+
 // Convert cstring_array to an array of n C strings and destroy the cstring_array
 char **cstring_array_to_strings(cstring_array *self);
 
@@ -285,6 +287,8 @@ void string_tree_add_string_len(string_tree_t *self, char *str, size_t len);
 void string_tree_append_string(string_tree_t *self, char *str);
 void string_tree_append_string_len(string_tree_t *self, char *str, size_t len);
 
+void string_tree_clear(string_tree_t *self);
+
 uint32_t string_tree_num_tokens(string_tree_t *self);
 uint32_t string_tree_num_strings(string_tree_t *self);