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