/*
* Copyright (C) 2008 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef _APPLYPATCH_H
#define _APPLYPATCH_H
#include <sys/stat.h>
#include "mincrypt/sha.h"
typedef struct _Patch {
uint8_t sha1[SHA_DIGEST_SIZE];
const char* patch_filename;
} Patch;
typedef struct _FileContents {
uint8_t sha1[SHA_DIGEST_SIZE];
unsigned char* data;
ssize_t size;
struct stat st;
} FileContents;
// When there isn't enough room on the target filesystem to hold the
// patched version of the file, we copy the original here and delete
// it to free up space. If the expected source file doesn't exist, or
// is corrupted, we look to see if this file contains the bits we want
// and use it as the source instead.
#define CACHE_TEMP_SOURCE "/cache/saved.file"
typedef ssize_t (*SinkFn)(unsigned char*, ssize_t, void*);
// applypatch.c
size_t FreeSpaceForFile(const char* filename);
int applypatch(int argc, char** argv);
// Read a file into memory; store it and its associated metadata in
// *file. Return 0 on success.
int LoadFileContents(const char* filename, FileContents* file);
void FreeFileContents(FileContents* file);
// bsdiff.c
void ShowBSDiffLicense();
int ApplyBSDiffPatch(const unsigned char* old_data, ssize_t old_size,
const char* patch_filename, ssize_t offset,
SinkFn sink, void* token, SHA_CTX* ctx);
int ApplyBSDiffPatchMem(const unsigned char* old_data, ssize_t old_size,
const char* patch_filename, ssize_t patch_offset,
unsigned char** new_data, ssize_t* new_size);
// imgpatch.c
int ApplyImagePatch(const unsigned char* old_data, ssize_t old_size,
const char* patch_filename,
SinkFn sink, void* token, SHA_CTX* ctx);
// freecache.c
int MakeFreeSpaceOnCache(size_t bytes_needed);
#endif
