mirror of
https://github.com/Decscots/Lockpick_RCM
synced 2024-11-22 20:39:25 +00:00
108 lines
No EOL
4.2 KiB
C
108 lines
No EOL
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 "duplex_storage.h"
|
|
|
|
#include <gfx_utils.h>
|
|
#include <mem/heap.h>
|
|
|
|
void save_duplex_storage_init(duplex_storage_ctx_t *ctx, uint8_t *data_a, uint8_t *data_b, uint32_t block_size_power, void *bitmap, uint64_t bitmap_size) {
|
|
substorage_init(&ctx->data_a, &memory_storage_vt, data_a, 0, ctx->_length);
|
|
substorage_init(&ctx->data_b, &memory_storage_vt, data_b, 0, ctx->_length);
|
|
substorage_init(&ctx->bitmap_storage, &memory_storage_vt, bitmap, 0, bitmap_size);
|
|
ctx->block_size = 1 << block_size_power;
|
|
|
|
ctx->bitmap.data = (uint8_t *)bitmap;
|
|
ctx->bitmap.bitmap = malloc(bitmap_size >> 3);
|
|
|
|
uint32_t bits_remaining = (uint32_t)bitmap_size;
|
|
uint32_t bitmap_pos = 0;
|
|
uint32_t *buffer_pos = (uint32_t *)ctx->bitmap.data;
|
|
while (bits_remaining) {
|
|
uint32_t bits_to_read = MIN(bits_remaining, 0x20);
|
|
uint32_t val = *buffer_pos;
|
|
for (uint32_t i = 0; i < bits_to_read; i++) {
|
|
if (val & 0x80000000)
|
|
save_bitmap_set_bit(ctx->bitmap.bitmap, bitmap_pos);
|
|
else
|
|
save_bitmap_clear_bit(ctx->bitmap.bitmap, bitmap_pos);
|
|
bitmap_pos++;
|
|
bits_remaining--;
|
|
val <<= 1;
|
|
}
|
|
buffer_pos++;
|
|
}
|
|
}
|
|
|
|
uint32_t save_duplex_storage_read(duplex_storage_ctx_t *ctx, void *buffer, uint64_t offset, uint64_t count) {
|
|
uint64_t in_pos = offset;
|
|
uint32_t out_pos = 0;
|
|
uint32_t remaining = count;
|
|
|
|
while (remaining) {
|
|
uint32_t block_num = (uint32_t)(in_pos / ctx->block_size);
|
|
uint32_t block_pos = (uint32_t)(in_pos % ctx->block_size);
|
|
uint32_t bytes_to_read = MIN(ctx->block_size - block_pos, remaining);
|
|
|
|
substorage *data = save_bitmap_check_bit(ctx->bitmap.bitmap, block_num) ? &ctx->data_b : &ctx->data_a;
|
|
if (substorage_read(data, (uint8_t *)buffer + out_pos, in_pos, bytes_to_read) != bytes_to_read)
|
|
return 0;
|
|
|
|
out_pos += bytes_to_read;
|
|
in_pos += bytes_to_read;
|
|
remaining -= bytes_to_read;
|
|
}
|
|
return out_pos;
|
|
}
|
|
|
|
uint32_t save_duplex_storage_write(duplex_storage_ctx_t *ctx, const void *buffer, uint64_t offset, uint64_t count) {
|
|
uint64_t in_pos = offset;
|
|
uint32_t out_pos = 0;
|
|
uint32_t remaining = count;
|
|
|
|
while (remaining) {
|
|
uint32_t block_num = (uint32_t)(in_pos / ctx->block_size);
|
|
uint32_t block_pos = (uint32_t)(in_pos % ctx->block_size);
|
|
uint32_t bytes_to_write = MIN(ctx->block_size - block_pos, remaining);
|
|
|
|
substorage *data = save_bitmap_check_bit(ctx->bitmap.bitmap, block_num) ? &ctx->data_b : &ctx->data_a;
|
|
if (substorage_write(data, (uint8_t *)buffer + out_pos, in_pos, bytes_to_write) != bytes_to_write)
|
|
return 0;
|
|
|
|
out_pos += bytes_to_write;
|
|
in_pos += bytes_to_write;
|
|
remaining -= bytes_to_write;
|
|
}
|
|
return out_pos;
|
|
} |