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detools.h
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detools.h
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/**
* BSD 2-Clause License
*
* Copyright (c) 2019-2020, Erik Moqvist
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* * Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* * Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef DETOOLS_H
#define DETOOLS_H
/*
* Configuration.
*
* Define any of the defines below to 0 to disable given feature.
*/
#ifndef DETOOLS_CONFIG_FILE_IO
# define DETOOLS_CONFIG_FILE_IO 1
#endif
#ifndef DETOOLS_CONFIG_COMPRESSION_NONE
# define DETOOLS_CONFIG_COMPRESSION_NONE 1
#endif
#ifndef DETOOLS_CONFIG_COMPRESSION_LZMA
# define DETOOLS_CONFIG_COMPRESSION_LZMA 1
#endif
#ifndef DETOOLS_CONFIG_COMPRESSION_CRLE
# define DETOOLS_CONFIG_COMPRESSION_CRLE 1
#endif
#ifndef DETOOLS_CONFIG_COMPRESSION_HEATSHRINK
# define DETOOLS_CONFIG_COMPRESSION_HEATSHRINK 1
#endif
#include <stdint.h>
#include <string.h>
#include <stdio.h>
#include <stdbool.h>
#define DETOOLS_VERSION "0.53.0"
/* Error codes. */
#define DETOOLS_OK 0
#define DETOOLS_NOT_IMPLEMENTED 1
#define DETOOLS_NOT_DONE 2
#define DETOOLS_BAD_PATCH_TYPE 3
#define DETOOLS_BAD_COMPRESSION 4
#define DETOOLS_INTERNAL_ERROR 5
#define DETOOLS_LZMA_INIT 6
#define DETOOLS_LZMA_DECODE 7
#define DETOOLS_OUT_OF_MEMORY 8
#define DETOOLS_CORRUPT_PATCH 9
#define DETOOLS_IO_FAILED 10
#define DETOOLS_ALREADY_DONE 11
#define DETOOLS_FILE_OPEN_FAILED 12
#define DETOOLS_FILE_CLOSE_FAILED 13
#define DETOOLS_FILE_READ_FAILED 14
#define DETOOLS_FILE_WRITE_FAILED 15
#define DETOOLS_FILE_SEEK_FAILED 16
#define DETOOLS_FILE_TELL_FAILED 17
#define DETOOLS_SHORT_HEADER 18
#define DETOOLS_NOT_ENOUGH_PATCH_DATA 19
#define DETOOLS_HEATSHRINK_SINK 20
#define DETOOLS_HEATSHRINK_POLL 21
#define DETOOLS_STEP_SET_FAILED 22
#define DETOOLS_STEP_GET_FAILED 23
#define DETOOLS_ALREADY_FAILED 24
#define DETOOLS_CORRUPT_PATCH_OVERFLOW 25
#define DETOOLS_CORRUPT_PATCH_CRLE_KIND 26
#define DETOOLS_HEATSHRINK_HEADER 27
/**
* Read callback.
*
* @param[in] arg_p User data passed to detools_apply_patch_init().
* @param[out] buf_p Buffer to read into.
* @param[in] size Number of bytes to read.
*
* @return zero(0) or negative error code.
*/
typedef int (*detools_read_t)(void *arg_p, uint8_t *buf_p, size_t size);
/**
* Write callback.
*
* @param[in] arg_p User data passed to detools_apply_patch_init().
* @param[in] buf_p Buffer to write.
* @param[in] size Number of bytes to write.
*
* @return zero(0) or negative error code.
*/
typedef int (*detools_write_t)(void *arg_p, const uint8_t *buf_p, size_t size);
/**
* Seek from current position callback.
*
* @param[in] arg_p User data passed to detools_apply_patch_init().
* @param[in] offset Offset to seek to from current position.
*
* @return zero(0) or negative error code.
*/
typedef int (*detools_seek_t)(void *arg_p, int offset);
/**
* Memory read callback.
*
* @param[in] arg_p User data passed to detools_apply_patch_init().
* @param[out] dst_p Buffer to read into.
* @param[in] src Address to read from.
* @param[in] size Number of bytes to read.
*
* @return zero(0) or negative error code.
*/
typedef int (*detools_mem_read_t)(void *arg_p,
void *dst_p,
uintptr_t src,
size_t size);
/**
* Memory write callback.
*
* @param[in] arg_p User data passed to detools_apply_patch_init().
* @param[in] dst Address to write to.
* @param[in] addr src_p Buffer to write from.
* @param[in] size Number of bytes to write.
*
* @return zero(0) or negative error code.
*/
typedef int (*detools_mem_write_t)(void *arg_p,
uintptr_t dst,
void *src_p,
size_t size);
/**
* Memory erase callback.
*
* @param[in] arg_p User data passed to detools_apply_patch_init().
* @param[in] addr Address to erase from.
* @param[in] size Number of bytes to erase.
*
* @return zero(0) or negative error code.
*/
typedef int (*detools_mem_erase_t)(void *arg_p, uintptr_t addr, size_t size);
/**
* State read callback.
*
* @param[in] arg_p User data passed to detools_apply_patch_init().
* @param[out] buf_p Buffer to read into.
* @param[in] size Number of bytes to read.
*
* @return zero(0) or negative error code.
*/
typedef int (*detools_state_read_t)(void *arg_p, void *buf_p, size_t size);
/**
* State write callback.
*
* @param[in] arg_p User data passed to detools_apply_patch_init().
* @param[in] buf_p Buffer to write.
* @param[in] size Number of bytes to write.
*
* @return zero(0) or negative error code.
*/
typedef int (*detools_state_write_t)(void *arg_p, const void *buf_p, size_t size);
/**
* Step set callback.
*
* @param[in] arg_p User data passed to detools_apply_patch_init().
* @param[in] step Step to set. Later read by the step get callback.
*
* @return zero(0) or negative error code.
*/
typedef int (*detools_step_set_t)(void *arg_p, int step);
/**
* Step get callback.
*
* @param[in] arg_p User data passed to detools_apply_patch_init().
* @param[out] step_p Outputs the most recently set step by the set
* callback, or zero(0) if not yet set.
*
* @return zero(0) or negative error code.
*/
typedef int (*detools_step_get_t)(void *arg_p, int *step_p);
struct detools_apply_patch_size_t {
int state;
int value;
int offset;
bool is_signed;
};
struct detools_apply_patch_patch_reader_none_t {
size_t patch_size;
size_t patch_offset;
};
#if DETOOLS_CONFIG_COMPRESSION_LZMA == 1
#include <lzma.h>
struct detools_apply_patch_patch_reader_lzma_t {
lzma_stream stream;
uint8_t *input_p;
uint8_t *output_p;
size_t output_size;
};
#endif
#if DETOOLS_CONFIG_COMPRESSION_HEATSHRINK == 1
#include "heatshrink_decoder.h"
struct detools_apply_patch_patch_reader_heatshrink_t {
int8_t window_sz2;
int8_t lookahead_sz2;
heatshrink_decoder *decoder_p;
#if HEATSHRINK_DYNAMIC_ALLOC == 0
heatshrink_decoder decoder;
#endif
};
#endif
enum detools_unpack_usize_state_t {
detools_unpack_usize_state_first_t = 0,
detools_unpack_usize_state_consecutive_t
};
struct detools_unpack_usize_t {
enum detools_unpack_usize_state_t state;
int value;
int offset;
};
enum detools_crle_state_t {
detools_crle_state_idle_t = 0,
detools_crle_state_scattered_size_t,
detools_crle_state_scattered_data_t,
detools_crle_state_repeated_repetitions_t,
detools_crle_state_repeated_data_t,
detools_crle_state_repeated_data_read_t
};
struct detools_apply_patch_patch_reader_crle_t {
enum detools_crle_state_t state;
union {
struct {
size_t number_of_bytes_left;
struct detools_unpack_usize_t size;
} scattered;
struct {
uint8_t value;
size_t number_of_bytes_left;
struct detools_unpack_usize_t size;
} repeated;
} kind;
};
struct detools_apply_patch_patch_reader_t {
struct detools_apply_patch_chunk_t *patch_chunk_p;
struct detools_apply_patch_size_t size;
union {
#if DETOOLS_CONFIG_COMPRESSION_NONE == 1
struct detools_apply_patch_patch_reader_none_t none;
#endif
#if DETOOLS_CONFIG_COMPRESSION_LZMA == 1
struct detools_apply_patch_patch_reader_lzma_t lzma;
#endif
#if DETOOLS_CONFIG_COMPRESSION_CRLE == 1
struct detools_apply_patch_patch_reader_crle_t crle;
#endif
#if DETOOLS_CONFIG_COMPRESSION_HEATSHRINK == 1
struct detools_apply_patch_patch_reader_heatshrink_t heatshrink;
#endif
} compression;
int (*destroy)(struct detools_apply_patch_patch_reader_t *self_p);
int (*decompress)(struct detools_apply_patch_patch_reader_t *self_p,
uint8_t *buf_p,
size_t *size_p);
};
struct detools_apply_patch_chunk_t {
const uint8_t *buf_p;
size_t size;
size_t offset;
};
enum detools_apply_patch_state_t {
detools_apply_patch_state_init_t = 0,
detools_apply_patch_state_dfpatch_size_t,
detools_apply_patch_state_diff_size_t,
detools_apply_patch_state_diff_data_t,
detools_apply_patch_state_extra_size_t,
detools_apply_patch_state_extra_data_t,
detools_apply_patch_state_adjustment_t,
detools_apply_patch_state_done_t,
detools_apply_patch_state_failed_t
};
enum detools_apply_patch_init_state_t {
detools_apply_patch_init_state_fixed_header_t = 0,
detools_apply_patch_init_state_to_size_t
};
/**
* The apply patch data structure.
*/
struct detools_apply_patch_t {
detools_read_t from_read;
detools_seek_t from_seek;
size_t patch_size;
detools_write_t to_write;
void *arg_p;
enum detools_apply_patch_state_t state;
enum detools_apply_patch_init_state_t init_state;
int compression;
size_t patch_offset;
size_t to_offset;
size_t to_size;
int from_offset;
size_t chunk_size;
struct detools_apply_patch_patch_reader_t patch_reader;
struct detools_apply_patch_chunk_t chunk;
struct detools_apply_patch_size_t size;
};
enum detools_apply_patch_in_place_init_state_t {
detools_apply_patch_in_place_init_state_fixed_header_t = 0,
detools_apply_patch_in_place_init_state_memory_size_t,
detools_apply_patch_in_place_init_state_segment_size_t,
detools_apply_patch_in_place_init_state_shift_size_t,
detools_apply_patch_in_place_init_state_from_size_t,
detools_apply_patch_in_place_init_state_to_size_t
};
/**
* The in-place apply patch data structure.
*/
struct detools_apply_patch_in_place_t {
detools_mem_read_t mem_read;
detools_mem_write_t mem_write;
detools_mem_erase_t mem_erase;
detools_step_set_t step_set;
detools_step_get_t step_get;
size_t patch_size;
void *arg_p;
enum detools_apply_patch_state_t state;
enum detools_apply_patch_in_place_init_state_t init_state;
int compression;
int ongoing_step;
size_t to_pos;
size_t to_size;
size_t from_size;
size_t memory_size;
size_t segment_size;
size_t shift_size;
size_t chunk_size;
struct {
size_t index;
int from_offset;
size_t to_offset;
size_t to_size;
size_t to_pos;
} segment;
struct detools_apply_patch_patch_reader_t patch_reader;
struct detools_apply_patch_chunk_t chunk;
struct detools_apply_patch_size_t size;
};
/**
* Initialize given apply patch object.
*
* @param[out] self_p Apply patch object to initialize.
* @param[in] from_read Callback to read from-data.
* @param[in] from_seek Callback to seek from current position in from-data.
* @param[in] patch_size Patch size in bytes. Not used if
* `detools_apply_patch_restore()` is called
* immediately after this function.
* @param[in] to_write Destination callback.
* @param[in] arg_p Argument passed to the callbacks.
*
* @return zero(0) or negative error code.
*/
int detools_apply_patch_init(struct detools_apply_patch_t *self_p,
detools_read_t from_read,
detools_seek_t from_seek,
size_t patch_size,
detools_write_t to_write,
void *arg_p);
/**
* Dump given apply patch object state. Call
* `detools_apply_patch_restore()` to restore an apply patch object to
* the dumped state.
*
* @param[in] self_p Apply patch object to dump.
* @param[in] write Write callback.
*
* @return zero(0) or negative error code.
*/
int detools_apply_patch_dump(struct detools_apply_patch_t *self_p,
detools_state_write_t state_write);
/**
* Restore given apply patch object to given dumped
* state.
*
* `detools_apply_patch_get_to_offset()` and
* `detools_apply_patch_get_patch_offset()` are often called after
* this function to restore the to and patch streams.
*
* @param[in,out] self_p Initialized apply patch object to restore.
* @param[in] read Callback to read the dumped state.
*
* @return zero(0) or negative error code.
*/
int detools_apply_patch_restore(struct detools_apply_patch_t *self_p,
detools_state_read_t state_read);
/**
* Get the current to stream offset. Often used to restore the to
* stream after restore.
*
* @param[in] self_p Apply patch object.
*
* @return The current to stream offset.
*/
size_t detools_apply_patch_get_to_offset(struct detools_apply_patch_t *self_p);
/**
* Get the current patch stream offset. Often used to restore the
* patch stream after restore.
*
* @param[in] self_p Apply patch object.
*
* @return The current patch stream offset.
*/
size_t detools_apply_patch_get_patch_offset(struct detools_apply_patch_t *self_p);
/**
* Call this function repeatedly until all patch data has been
* processed or an error occurres. Call detools_apply_patch_finalize()
* to finalize the patching, even if an error occurred.
*
* @param[in,out] self_p Initialized apply patch object.
* @param[in] patch_p Next chunk of the patch.
* @param[in] size Patch buffer size.
*
* @return zero(0) or negative error code.
*/
int detools_apply_patch_process(struct detools_apply_patch_t *self_p,
const uint8_t *patch_p,
size_t size);
/**
* Call once after all data has been processed to finalize the
* patching. The value returned from this function should be ignored
* if an error occurred in detools_apply_patch_process().
*
* @param[in,out] self_p Initialized apply patch object.
*
* @return Size of to-data in bytes if the patch was applied
* successfully, or negative error code.
*/
int detools_apply_patch_finalize(struct detools_apply_patch_t *self_p);
/**
* Initialize given in-place apply patch object.
*
* @param[out] self_p In-place apply patch object to initialize.
* @param[in] mem_read Callback to read data.
* @param[in] mem_write Callback to write data.
* @param[in] mem_erase Callback to erase data.
* @param[in] step_set Callback to set the step.
* @param[in] step_get Callback to get the step.
* @param[in] patch_size Patch size in bytes.
* @param[in] arg_p Argument passed to the callbacks.
*
* @return zero(0) or negative error code.
*/
int detools_apply_patch_in_place_init(
struct detools_apply_patch_in_place_t *self_p,
detools_mem_read_t mem_read,
detools_mem_write_t mem_write,
detools_mem_erase_t mem_erase,
detools_step_set_t step_set,
detools_step_get_t step_get,
size_t patch_size,
void *arg_p);
/**
* Call this function repeatedly until all patch data has been
* processed or an error occurres. Call
* detools_apply_patch_in_place_finalize() to finalize the patching,
* even if an error occurred.
*
* @param[in,out] self_p Initialized apply patch object.
* @param[in] patch_p Next chunk of the patch.
* @param[in] size Patch buffer size.
*
* @return zero(0) or negative error code.
*/
int detools_apply_patch_in_place_process(
struct detools_apply_patch_in_place_t *self_p,
const uint8_t *patch_p,
size_t size);
/**
* Call once after all data has been processed to finalize the
* patching. The value returned from this function should be ignored
* if an error occurred in detools_apply_patch_in_place_process().
*
* @param[in,out] self_p Initialized apply patch object.
*
* @return Size of to-data in bytes if the patch was applied
* successfully, or negative error code.
*/
int detools_apply_patch_in_place_finalize(
struct detools_apply_patch_in_place_t *self_p);
/**
* Apply given patch using read, write and seek callbacks.
*
* @param[in] from_read Source read callback.
* @param[in] from_seek Source seek callback.
* @param[in] patch_read Patch read callback.
* @param[in] patch_size Patch size in bytes.
* @param[in] to_write Destination write callback.
* @param[in] arg_p Argument passed to all callbacks.
*
* @return Size of to-data in bytes or negative error code.
*/
int detools_apply_patch_callbacks(detools_read_t from_read,
detools_seek_t from_seek,
detools_read_t patch_read,
size_t patch_size,
detools_write_t to_write,
void *arg_p);
/**
* Apply given in-place patch using read, write and erase callbacks.
*
* @param[in] mem_read Callback to read data.
* @param[in] mem_write Callback to write data.
* @param[in] mem_erase Callback to erase data.
* @param[in] step_set Callback to set the step.
* @param[in] step_get Callback to get the step.
* @param[in] patch_read Patch read callback.
* @param[in] patch_size Patch size in bytes.
* @param[in] arg_p Argument passed to the callbacks.
*
* @return Size of to-data in bytes or negative error code.
*/
int detools_apply_patch_in_place_callbacks(detools_mem_read_t mem_read,
detools_mem_write_t mem_write,
detools_mem_erase_t mem_erase,
detools_step_set_t step_set,
detools_step_get_t step_get,
detools_read_t patch_read,
size_t patch_size,
void *arg_p);
#if DETOOLS_CONFIG_FILE_IO == 1
/**
* Apply given patch file to given from file and write the output to
* given to file.
*
* @param[in] from_p Source file name.
* @param[in] patch_p Patch file name.
* @param[in] to_p Destination file name.
*
* @return Size of to-data in bytes or negative error code.
*/
int detools_apply_patch_filenames(const char *from_p,
const char *patch_p,
const char *to_p);
/**
* Apply given patch file to given memory file.
*
* @param[in] memory_p Memory file name.
* @param[in] patch_p Patch file name.
* @param[in] step_set Callback to set the step.
* @param[in] step_get Callback to get the step.
*
* @return Size of to-data in bytes or negative error code.
*/
int detools_apply_patch_in_place_filenames(const char *memory_p,
const char *patch_p,
detools_step_set_t step_set,
detools_step_get_t step_get);
#endif
/**
* Get the error string for given error code.
*
* @param[in] Error code.
*
* @return Error string.
*/
const char *detools_error_as_string(int error);
#endif