Add some "labeled storagedir" abstractions.

These add a tiny bit of structure on top of the regular storagedir
abstractions in order to store key-value lists at the head of each
document.

1 files changed, 14 insertions, 1 deletions

diff --git a/src/common/storagedir.h b/src/common/storagedir.h
index 29be941b14..781194407f 100644
--- a/src/common/storagedir.h
+++ b/src/common/storagedir.h
@@ -5,7 +5,7 @@
 #define TOR_STORAGEDIR_H
 
 typedef struct storage_dir_t storage_dir_t;
-
+struct config_line_t;
 struct sandbox_cfg_elem;
 
 storage_dir_t * storage_dir_new(const char *dirname, int n_files);
@@ -26,6 +26,19 @@ int storage_dir_save_string_to_file(storage_dir_t *d,
                                     const char *data,
                                     int binary,
                                     char **fname_out);
+int storage_dir_save_labeled_to_file(storage_dir_t *d,
+                                      const struct config_line_t *labels,
+                                      const uint8_t *data,
+                                      size_t length,
+                                      char **fname_out);
+tor_mmap_t *storage_dir_map_labeled(storage_dir_t *dir,
+                                     const char *fname,
+                                     struct config_line_t **labels_out,
+                                     const uint8_t **data_out,
+                                     size_t *size_out);
+uint8_t *storage_dir_read_labeled(storage_dir_t *d, const char *fname,
+                                   struct config_line_t **labels_out,
+                                   size_t *sz_out);
 void storage_dir_remove_file(storage_dir_t *d,
                              const char *fname);
 int storage_dir_shrink(storage_dir_t *d,