mirror of
https://github.com/suchmememanyskill/TegraExplorer.git
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92 lines
3.5 KiB
C
92 lines
3.5 KiB
C
/*
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* Copyright (c) 2019-2020 shchmue
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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/*
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ISC License
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hactool Copyright (c) 2018, SciresM
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Permission to use, copy, modify, and/or distribute this software for any
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purpose with or without fee is hereby granted, provided that the above
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copyright notice and this permission notice appear in all copies.
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THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#include "journal_storage.h"
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#include "header.h"
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#include <gfx_utils.h>
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#include <mem/heap.h>
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#include <string.h>
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void save_journal_storage_init(journal_storage_ctx_t *ctx, substorage *base_storage, journal_header_t *header, journal_map_params_t *map_info) {
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memcpy(&ctx->base_storage, base_storage, sizeof(substorage));
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ctx->header = header;
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save_journal_map_init(&ctx->map, &header->map_header, map_info);
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ctx->block_size = (uint32_t)header->block_size;
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ctx->length = header->total_size - header->journal_size;
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}
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uint32_t save_journal_storage_read(journal_storage_ctx_t *ctx, void *buffer, uint64_t offset, uint64_t count) {
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uint64_t in_pos = offset;
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uint32_t out_pos = 0;
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uint32_t remaining = count;
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while (remaining) {
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uint32_t block_num = (uint32_t)(in_pos / ctx->block_size);
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uint32_t block_pos = (uint32_t)(in_pos % ctx->block_size);
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uint64_t physical_offset = ctx->map.entries[block_num].physical_index * ctx->block_size + block_pos;
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uint32_t bytes_to_read = MIN(ctx->block_size - block_pos, remaining);
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if (substorage_read(&ctx->base_storage, (uint8_t *)buffer + out_pos, physical_offset, bytes_to_read) != bytes_to_read)
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return 0;
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out_pos += bytes_to_read;
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in_pos += bytes_to_read;
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remaining -= bytes_to_read;
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}
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return out_pos;
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}
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uint32_t save_journal_storage_write(journal_storage_ctx_t *ctx, const void *buffer, uint64_t offset, uint64_t count) {
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uint64_t in_pos = offset;
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uint32_t out_pos = 0;
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uint32_t remaining = count;
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while (remaining) {
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uint32_t block_num = (uint32_t)(in_pos / ctx->block_size);
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uint32_t block_pos = (uint32_t)(in_pos % ctx->block_size);
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uint64_t physical_offset = ctx->map.entries[block_num].physical_index * ctx->block_size + block_pos;
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uint32_t bytes_to_write = MIN(ctx->block_size - block_pos, remaining);
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if (substorage_write(&ctx->base_storage, (uint8_t *)buffer + out_pos, physical_offset, bytes_to_write) != bytes_to_write)
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return 0;
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out_pos += bytes_to_write;
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in_pos += bytes_to_write;
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remaining -= bytes_to_write;
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}
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return out_pos;
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}
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