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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
#ifndef MOZ_ZUCCHINI_H
#define MOZ_ZUCCHINI_H
// This is the zucchini interface exposed to updater.cpp. To mimic the way we
// interface with bspatch, this interface assumes that the caller will first
// load a patch, then check the size and crc32 of the source file on their own,
// and finally call us back to apply the patch. To achieve this, we essentially
// split zucchini::ApplyCommon into two separate functions MappedPatch::Load
// and MappedPatch::ApplyUnsafe. The latter is called unsafe because we rely on
// the assumption that the caller has properly checked the size and crc32 of
// the source file. For this purpose, we also expose a function to compute the
// zucchini crc32.
#include <cstdio>
#include <cstdint>
namespace zucchini {
namespace status {
// Zucchini status code, which can also be used as process exit code. Therefore
// success is explicitly 0.
enum Code {
kStatusSuccess = 0,
kStatusInvalidParam = 1,
kStatusFileReadError = 2,
kStatusFileWriteError = 3,
kStatusPatchReadError = 4,
kStatusPatchWriteError = 5,
kStatusInvalidOldImage = 6,
kStatusInvalidNewImage = 7,
kStatusDiskFull = 8,
kStatusIoError = 9,
kStatusFatal = 10,
};
} // namespace status
namespace mozilla {
using LogFunctionPtr = void (*)(const char* aMessage);
void SetLogFunction(LogFunctionPtr aLogFunction);
uint32_t ComputeCrc32(const uint8_t* aBuf, size_t aBufSize);
class MappedPatchImpl;
class MappedPatch {
public:
MappedPatch();
~MappedPatch();
status::Code Load(FILE* aPatchFile, uint32_t* aSourceSize,
uint32_t* aDestinationSize, uint32_t* aSourceCrc32);
// Applies the loaded patch to aOldImage, and writes the result to
// aNewFile. aNewFile is never deleted, cleanup is up to the caller.
// Assumes that the crc32 and size of aCheckOldImage have already been
// checked by the caller, hence the name.
status::Code ApplyUnsafe(const uint8_t* aCheckedOldImage,
size_t aCheckedOldImageSize, FILE* aNewFile);
private:
MappedPatchImpl* mImpl;
};
} // namespace mozilla
} // namespace zucchini
#endif // MOZ_ZUCCHINI_H