[fix] contiguous string array

src/string_utils.c

@@ -382,7 +382,6 @@ uint32_t cstring_array_add_string(cstring_array *self, char *str) {
 
 uint32_t cstring_array_add_string_len(cstring_array *self, char *str, size_t len) {
     uint32_t index = cstring_array_start_token(self);
-    cstring_array_start_token(self);
     char_array_append_len(self->str, str, len);
     char_array_terminate(self->str);
     return index;
@@ -397,6 +396,7 @@ int32_t cstring_array_get_offset(cstring_array *self, uint32_t i) {
 
 char *cstring_array_get_token(cstring_array *self, uint32_t i) {
     int32_t data_index = cstring_array_get_offset(self, i);
+    if (data_index < 0) return NULL;
     return self->str->a + data_index;
 }
 

src/string_utils.h

@@ -28,6 +28,7 @@ bool string_ends_with(const char *str, const char *ending);
 uint string_translate(char *str, size_t len, char *word_chars, char *word_repls, size_t trans_len);
 
 char *utf8_reversed_string(const char *s); // returns a copy, caller frees
+ssize_t utf8proc_iterate_reversed(const uint8_t *str, const uint8_t *start, int32_t *dst);
 bool utf8_is_letter(int32_t ch);
 
 char *string_strip_whitespace(char *str);