Add formal benc cursor

1 files changed, 18 insertions, 0 deletions

diff --git a/src/benc.h b/src/benc.h
index a5734ea..be06d5e 100644
--- a/src/benc.h
+++ b/src/benc.h
@@ -27,5 +27,23 @@ bool readint(const char** loc, int64_t* val);
 void benc_print(const struct benc_node* stream, size_t stream_len, int* depth);
 int64_t benc_decode(const char** cursor, const char* end, int* depth, struct benc_node* stream, size_t stream_len);
 
+struct bcursor {
+	const char* source;
+	const char* const source_end; 
+	int source_depth;
+
+	struct benc_node* const base;
+	const size_t base_len;
+
+	struct benc_node* readhead;
+	struct benc_node* end;
+};
+
+int bcur_open(struct bcursor* cursor, const char* source, const char* source_end, struct benc_node* buffer, size_t buffer_len);
+int bcur_next(struct bcursor* cursor, uint32_t steps);
+int bcur_next_sibling(struct bcursor* cursor);
+ssize_t bcur_find_key(struct bcursor* cursor, const enum benc_nodetype* keyTypes, const char** keyValues, const size_t* keyLengths, const size_t keys);
+
 void skip_sibling(const struct benc_node** cursor, const struct benc_node* end);
 ssize_t skip_to_key(const struct benc_node** cursor, const struct benc_node* end, const enum benc_nodetype* keyTypes, const char** keyValues, const size_t* keyLengths, const size_t keys);
+