Initial community commit

Src/nsmkv/vint.h

@@ -0,0 +1,14 @@
+#pragma once
+#include <bfc/platform/types.h>
+
+uint8_t vint_get_number_bytes(uint8_t first_byte);
+/* call if you already know the len (e.g. from vint_get_number_bytes earlier */
+uint64_t vint_read_ptr_len(uint8_t len, const uint8_t *ptr);
+int64_t vsint_read_ptr_len(uint8_t len, const uint8_t *ptr);
+
+/* don't call this unless you're sure that you have enough room in the buffer! */
+uint64_t vint_read_ptr(const uint8_t *ptr);
+int64_t vsint_read_ptr(const uint8_t *ptr);
+
+/* values encoded as all 1's are supposed to indicate 'unknown value' */
+bool vint_unknown_length(uint8_t len, const uint8_t *ptr);