#define UPKG_HDR_MAGIC 0x9e2a83c1
#define UPKG_HDR_SIZE 36
+struct upkg_file_ops {
+ size_t (*read)(void *buf, size_t size, void *handle);
+ int (*seek)(void *handle, long offset, int whence);
+ long (*tell)(void *handle);
+ int (*eof) (void *handle);
+};
+
struct upkg {
unsigned version, license;
unsigned char guid[16];
unsigned long base, offset, len;
};
+/* Default I/O operations for ordinary files. */
+extern const struct upkg_file_ops upkg_default_fops;
+
+struct upkg *upkg_open(void *handle, const struct upkg_file_ops *fops,
+ int (*destructor)(void *handle));
struct upkg *upkg_fopen(const char *path);
int upkg_close(struct upkg *pkg);