5b51d50ade
1. effective "Differential Upgrade" patch algorithm with high compression rate 2. effective recovery algorithm support recovery firmware in blocks which has low memory consumption and wear-leveling strategies, especially suitable for embeded devices with low RAM. 3. add sample ota bootloader project, see: board\TencentOS_tiny_EVB_MX_Plus\KEIL\ota\ota_bootloader_recovery 4. add sample application project for download firmware through http, see: board\TencentOS_tiny_EVB_MX_Plus\KEIL\ota\ota_application_download_through_http 5. add sample application project for download firmware through qcloud explorer console, see: board\TencentOS_tiny_EVB_MX_Plus\KEIL\ota\ota_application_download_through_qcloud_iot_explorer 6. an OTA markdown document is pending
88 lines
2.7 KiB
C
88 lines
2.7 KiB
C
/*----------------------------------------------------------------------------
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* Tencent is pleased to support the open source community by making TencentOS
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* available.
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*
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* Copyright (C) 2019 THL A29 Limited, a Tencent company. All rights reserved.
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* If you have downloaded a copy of the TencentOS binary from Tencent, please
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* note that the TencentOS binary is licensed under the BSD 3-Clause License.
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*
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* If you have downloaded a copy of the TencentOS source code from Tencent,
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* please note that TencentOS source code is licensed under the BSD 3-Clause
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* License, except for the third-party components listed below which are
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* subject to different license terms. Your integration of TencentOS into your
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* own projects may require compliance with the BSD 3-Clause License, as well
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* as the other licenses applicable to the third-party components included
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* within TencentOS.
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*---------------------------------------------------------------------------*/
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#include "lzma_compress.h"
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#include "Alloc.h"
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#include "LzmaDec.h"
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#include "LzmaEnc.h"
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#include "stdlib.h"
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#pragma pack(push, 1)
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typedef struct lzma_props_st {
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uint8_t data[LZMA_PROPS_SIZE];
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} lzma_props_t;
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#pragma pack(pop)
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static void *lzma_wrapper_alloc(ISzAllocPtr p, size_t size)
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{
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(void)p;
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if (size == 0) {
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return 0;
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}
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return malloc(size);
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}
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static void lzma_wrapper_free(ISzAllocPtr p, void *address)
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{
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(void)p;
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free(address);
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}
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static ISzAlloc wrapper_alloc = { lzma_wrapper_alloc, lzma_wrapper_free };
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static lzma_err_t lzma_do_compress(uint8_t *dst, size_t *dst_len, const uint8_t *src, size_t src_len, lzma_props_t *props)
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{
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CLzmaEncProps enc_props;
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size_t props_size = LZMA_PROPS_SIZE;
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LzmaEncProps_Init(&enc_props);
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enc_props.level = 9;
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enc_props.lc = 0;
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return (lzma_err_t)LzmaEncode(dst, dst_len,
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src, src_len,
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&enc_props,
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props->data, &props_size,
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0, NULL,
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&wrapper_alloc, &wrapper_alloc);
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}
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lzma_err_t lzma_compress(uint8_t *dst, size_t *dst_len, const uint8_t *src, size_t src_len)
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{
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lzma_err_t err;
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lzma_props_t *out_props;
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size_t compressed_len;
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if (*dst_len <= sizeof(lzma_props_t)) {
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return LZMA_ERR_MEM;
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}
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out_props = (lzma_props_t *)dst;
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compressed_len = *dst_len - sizeof(lzma_props_t);
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err = lzma_do_compress(dst + sizeof(lzma_props_t), &compressed_len,
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src, src_len, out_props);
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if (err == LZMA_ERR_OK) {
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*dst_len = compressed_len + sizeof(lzma_props_t);
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}
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return err;
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}
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