mirror of
https://github.com/DarkFlippers/unleashed-firmware
synced 2024-11-27 15:00:46 +00:00
39 lines
1.2 KiB
C
39 lines
1.2 KiB
C
|
#include "crc32_calc.h"
|
||
|
|
#include <littlefs/lfs_util.h>
|
||
|
|
|
||
|
|
#define CRC_DATA_BUFFER_MAX_LEN 512
|
||
|
|
|
||
|
|
uint32_t crc32_calc_buffer(uint32_t crc, const void* buffer, size_t size) {
|
||
|
|
// TODO: consider removing dependency on LFS
|
||
|
|
return ~lfs_crc(~crc, buffer, size);
|
||
|
|
}
|
||
|
|
|
||
|
|
uint32_t crc32_calc_file(File* file, const FileCrcProgressCb progress_cb, void* context) {
|
||
|
|
furi_check(storage_file_is_open(file) && storage_file_seek(file, 0, true));
|
||
|
|
|
||
|
|
uint32_t file_crc = 0;
|
||
|
|
|
||
|
|
uint8_t* data_buffer = malloc(CRC_DATA_BUFFER_MAX_LEN);
|
||
|
|
uint16_t data_buffer_valid_len;
|
||
|
|
|
||
|
|
uint32_t file_size = storage_file_size(file);
|
||
|
|
|
||
|
|
/* Feed file contents per sector into CRC calc */
|
||
|
|
for(uint32_t fptr = 0; fptr < file_size;) {
|
||
|
|
data_buffer_valid_len = storage_file_read(file, data_buffer, CRC_DATA_BUFFER_MAX_LEN);
|
||
|
|
if(data_buffer_valid_len == 0) {
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
fptr += data_buffer_valid_len;
|
||
|
|
|
||
|
|
if(progress_cb && (fptr % CRC_DATA_BUFFER_MAX_LEN == 0)) {
|
||
|
|
progress_cb(fptr * 100 / file_size, context);
|
||
|
|
}
|
||
|
|
|
||
|
|
file_crc = crc32_calc_buffer(file_crc, data_buffer, data_buffer_valid_len);
|
||
|
|
}
|
||
|
|
free(data_buffer);
|
||
|
|
|
||
|
|
return file_crc;
|
||
|
|
}
|