mirror of
https://github.com/suchmememanyskill/TegraExplorer.git
synced 2024-11-08 13:11:54 +00:00
131 lines
4.2 KiB
C
131 lines
4.2 KiB
C
/*
|
|
* Copyright (c) 2019-2020 shchmue
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
* under the terms and conditions of the GNU General Public License,
|
|
* version 2, as published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope it will be useful, but WITHOUT
|
|
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
|
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
|
|
* more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
/*
|
|
ISC License
|
|
|
|
hactool Copyright (c) 2018, SciresM
|
|
|
|
Permission to use, copy, modify, and/or distribute this software for any
|
|
purpose with or without fee is hereby granted, provided that the above
|
|
copyright notice and this permission notice appear in all copies.
|
|
|
|
THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
|
|
WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
|
|
MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
|
|
ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
|
|
WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
|
|
ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
|
|
OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
|
|
*/
|
|
|
|
#include "save_data_file.h"
|
|
|
|
#include <gfx_utils.h>
|
|
|
|
void save_data_file_init(save_data_file_ctx_t *ctx, allocation_table_storage_ctx_t *base_storage, const char *path, hierarchical_save_file_table_ctx_t *file_table, uint64_t size, open_mode_t mode) {
|
|
ctx->mode = mode;
|
|
memcpy(&ctx->base_storage, base_storage, sizeof(allocation_table_storage_ctx_t));
|
|
ctx->path = path;
|
|
ctx->file_table = file_table;
|
|
ctx->size = size;
|
|
}
|
|
|
|
bool save_data_file_validate_read_params(save_data_file_ctx_t *ctx, uint64_t *out_bytes_to_read, uint64_t offset, uint32_t size, open_mode_t open_mode) {
|
|
*out_bytes_to_read = 0;
|
|
|
|
if ((open_mode & OPEN_MODE_READ) == 0)
|
|
return false;
|
|
|
|
uint64_t file_size = ctx->size;
|
|
|
|
if (offset > file_size)
|
|
return false;
|
|
|
|
*out_bytes_to_read = MIN(file_size - offset, size);
|
|
|
|
return true;
|
|
}
|
|
|
|
bool save_data_file_validate_write_params(save_data_file_ctx_t *ctx, uint64_t offset, uint32_t size, open_mode_t open_mode, bool *out_is_resize_needed) {
|
|
*out_is_resize_needed = false;
|
|
|
|
if ((open_mode & OPEN_MODE_WRITE) == 0)
|
|
return false;
|
|
|
|
uint64_t file_size = ctx->size;
|
|
|
|
if (offset + size > file_size) {
|
|
*out_is_resize_needed = true;
|
|
|
|
if ((open_mode & OPEN_MODE_ALLOW_APPEND) == 0)
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
bool save_data_file_read(save_data_file_ctx_t *ctx, uint64_t *out_bytes_read, uint64_t offset, void *buffer, uint64_t count) {
|
|
uint64_t to_read = 0;
|
|
|
|
if (!save_data_file_validate_read_params(ctx, &to_read, offset, count, ctx->mode))
|
|
return false;
|
|
|
|
if (to_read == 0) {
|
|
*out_bytes_read = 0;
|
|
return true;
|
|
}
|
|
|
|
*out_bytes_read = save_allocation_table_storage_read(&ctx->base_storage, buffer, offset, to_read);
|
|
return true;
|
|
}
|
|
|
|
bool save_data_file_write(save_data_file_ctx_t *ctx, uint64_t *out_bytes_written, uint64_t offset, const void *buffer, uint64_t count) {
|
|
bool is_resize_needed;
|
|
|
|
if (!save_data_file_validate_write_params(ctx, offset, count, ctx->mode, &is_resize_needed))
|
|
return false;
|
|
|
|
if (!save_data_file_set_size(ctx, offset + count))
|
|
return false;
|
|
|
|
|
|
*out_bytes_written = save_allocation_table_storage_write(&ctx->base_storage, buffer, offset, count);
|
|
return true;
|
|
}
|
|
|
|
bool save_data_file_set_size(save_data_file_ctx_t *ctx, uint64_t size) {
|
|
if (ctx->size == size)
|
|
return true;
|
|
|
|
save_allocation_table_storage_set_size(&ctx->base_storage, size);
|
|
|
|
save_file_info_t file_info;
|
|
if (!save_hierarchical_file_table_try_open_file(ctx->file_table, ctx->path, &file_info)) {
|
|
EPRINTF("File not found!");
|
|
return false;
|
|
}
|
|
|
|
file_info.start_block = ctx->base_storage.initial_block;
|
|
fs_int64_set(&file_info.length, size);
|
|
|
|
if (!save_hierarchical_file_table_add_file(ctx->file_table, ctx->path, &file_info))
|
|
return false;
|
|
|
|
ctx->size = size;
|
|
|
|
return true;
|
|
}
|