int xdiff_outf(void *priv_, mmbuffer_t *mb, int nbuf);
int parse_hunk_header(char *line, int len,
int *ob, int *on,
int xdiff_outf(void *priv_, mmbuffer_t *mb, int nbuf);
int parse_hunk_header(char *line, int len,
int *ob, int *on,
int read_mmfile(mmfile_t *ptr, const char *filename);
int buffer_is_binary(const char *ptr, unsigned long size);
int read_mmfile(mmfile_t *ptr, const char *filename);
int buffer_is_binary(const char *ptr, unsigned long size);