Still haven't properly tested MetaTree. But have all of the current features working together.

espReader/ESPReader.h

@@ -75,6 +75,7 @@ extern "C" {
         typedef struct record Record;
         typedef struct field Field;
         typedef struct meta_node MetaNode;
+        typedef struct meta_tree MetaTree;
 
 
         //
@@ -215,6 +216,11 @@ extern "C" {
                 void *data;
         };
 
+        struct meta_callbacks {
+                void (*pre)(MetaNode *m, void *data);
+                void *data;
+        };
+
         /* Meta Nodes are used for constructing a more flexible tree structure
          * on top of the natural structure of ESP/ESM files.
          *
@@ -249,6 +255,11 @@ extern "C" {
                 MetaNode *next;
         };
 
+        struct meta_tree {
+                MetaNode *root;
+                size_t size;
+        };
+
         //
         // === BINARY DATA OVERLAYS ===
         //
@@ -340,8 +351,7 @@ extern "C" {
          * increasing in terms of memory location within the buffer.
          */
         void espr_walk(
-                char *data, 
-                size_t size, 
+                struct sized_buf esp, 
                 struct walker_callbacks cb,
                 void *from_parent
         );
@@ -349,13 +359,13 @@ extern "C" {
         /* `espr_print` prints the header of every group and record in the given
          * esp/esm binary data.
          */
-        void espr_print(char *data, size_t size);
+        void espr_print(struct sized_buf esp);
 
         /* Calculates the number of groups and records in the esp/esm file and
          * the size of the esp/esm if all of the compressed records were
          * decompressed.
          */
-        struct esp_stats espr_stats(char *data, size_t size);
+        struct esp_stats espr_stats(struct sized_buf esp);
 
         // Calculates the number of formid's in an esm/esp from the stats
         inline uint32_t espr_formid_count(struct esp_stats stats) {
@@ -378,10 +388,8 @@ extern "C" {
          * `espr_decompressed_size`, and `buf` should be at least of that size.
          */
         void espr_decompress(
-                char *data, 
-                size_t size, 
-                char *buf, 
-                size_t buf_size
+                struct sized_buf esp,
+                struct sized_buf decom
         );
 
         /* Constructs a MetaNode tree in `tree` over the esp/esm data in `in`.
@@ -390,7 +398,13 @@ extern "C" {
          * data, and also allow for modifications that add, remove, or change 
          * the size of groups/records/fields.
          */
-        MetaNode *espr_create_tree(struct sized_buf in, struct sized_buf tree);
+        MetaTree espr_create_tree(struct sized_buf in, struct sized_buf tree);
+
+        void espr_meta_walk(MetaTree tree, struct meta_callbacks cb);
+
+        void espr_meta_node_walk(MetaNode *m, struct meta_callbacks cb);
+
+        void espr_serialize(MetaTree tree, struct sized_buf out);
 
 // End C++ guard
 #ifdef __cplusplus