#ifndef RIFF_H#define RIFF_H struct riff; struct riff_chunk {    unsigned type;    long offset;    unsigned size;    struct riff *nested;}; struct riff {    unsigned type;    unsigned chunk_count;    struct riff_chunk *chunks;}; struct riff *riff_parse(DUMBFILE *f, long offset, long size, unsigned proper);void riff_free(struct riff *); #endif