#ifndef PATCH_H
#define PATCH_H

// Image patch chunk types
#define CHUNK_NORMAL   0
#define CHUNK_GZIP     1   // version 1 only
#define CHUNK_DEFLATE  2   // version 2 only
#define CHUNK_RAW      3   // version 2 only

// The gzip header size is actually variable, but we currently don't
// support gzipped data with any of the optional fields, so for now it
// will always be ten bytes.  See RFC 1952 for the definition of the
// gzip format.
#define GZIP_HEADER_LEN   10

// The gzip footer size really is fixed.
#define GZIP_FOOTER_LEN   8

int lzma_decompress(unsigned char *data_in, unsigned char *cpage_out, 
						ssize_t srclen, ssize_t dstlen);

int ApplyBSDiffPatch(const unsigned char *old_data, ssize_t old_size,
                        unsigned char *patch, ssize_t patch_size, ssize_t patch_offset, 
                        unsigned char **new_data, ssize_t *new_size);

int ApplyImagePatch(unsigned char *old_data, ssize_t old_size,
                    unsigned char *patch, ssize_t patch_size, 
					unsigned char **new_data, ssize_t *new_size, 
					int seg_num);

int ApplyOverridePatch(const unsigned char* old_data, ssize_t old_size,
                        unsigned char* patch, ssize_t patch_size, ssize_t patch_offset, 
                        unsigned char** new_data, ssize_t* new_size);

unsigned char *lzma_decode(const char *file_name, size_t *out_sz);
int lzma_encode(const char *in, ssize_t in_len, char *out_file);

#endif /*PATCH_H*/