1 /* 2 * Copyright (C) 2008 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #ifndef _APPLYPATCH_H 18 #define _APPLYPATCH_H 19 20 #include <sys/stat.h> 21 #include "mincrypt/sha.h" 22 23 typedef struct _Patch { 24 uint8_t sha1[SHA_DIGEST_SIZE]; 25 const char* patch_filename; 26 } Patch; 27 28 typedef struct _FileContents { 29 uint8_t sha1[SHA_DIGEST_SIZE]; 30 unsigned char* data; 31 size_t size; 32 struct stat st; 33 } FileContents; 34 35 // When there isn't enough room on the target filesystem to hold the 36 // patched version of the file, we copy the original here and delete 37 // it to free up space. If the expected source file doesn't exist, or 38 // is corrupted, we look to see if this file contains the bits we want 39 // and use it as the source instead. 40 #define CACHE_TEMP_SOURCE "/cache/saved.file" 41 42 typedef size_t (*SinkFn)(unsigned char*, size_t, void*); 43 44 // applypatch.c 45 size_t FreeSpaceForFile(const char* filename); 46 int applypatch(int argc, char** argv); 47 48 // bsdiff.c 49 void ShowBSDiffLicense(); 50 int ApplyBSDiffPatch(const unsigned char* old_data, ssize_t old_size, 51 const char* patch_filename, ssize_t offset, 52 SinkFn sink, void* token, SHA_CTX* ctx); 53 int ApplyBSDiffPatchMem(const unsigned char* old_data, ssize_t old_size, 54 const char* patch_filename, ssize_t patch_offset, 55 unsigned char** new_data, ssize_t* new_size); 56 57 // imgpatch.c 58 int ApplyImagePatch(const unsigned char* old_data, ssize_t old_size, 59 const char* patch_filename, 60 SinkFn sink, void* token, SHA_CTX* ctx); 61 62 // freecache.c 63 int MakeFreeSpaceOnCache(size_t bytes_needed); 64 65 #endif 66