mirror of https://github.com/t1meshift/os_labs.git
Add 6th lab
parent
ea3de372a4
commit
e69a88c336
GPG Key ID:
B133F3167ABF94D8
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@ -17,4 +17,5 @@ define_lab(lab2)
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define_lab(lab3)
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define_lab(lab4)
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define_lab(lab5)
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define_lab(lab6)
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define_lab(lab7)
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@ -0,0 +1,77 @@
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#!/usr/bin/env bash
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set -euo pipefail
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IFS=$'\n\t'
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function assert() {
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local checksum_prg="./lab6_check-$1.c_run"
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local input=$2
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local expected=$3
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local got
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echo "Testing $1 on string \`"$input"'..."
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got=$($checksum_prg -q <(printf "%s" "$input"))
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if diff -q <(echo "$got") <(echo "$expected") > /dev/null; then
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echo "OK!"
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else
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echo "Assertion failed!"
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echo "Expected: $expected"
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echo "Got: $got"
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fi
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}
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function run_bench() {
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local checksum_prg="./lab6_check-$1.c_run"
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echo "Benchmarking $1 with file $2..."
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$checksum_prg -b "$2"
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}
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pushd "$1" > /dev/null
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# Checked with https://www.scadacore.com/tools/programming-calculators/online-checksum-calculator/
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assert xor "123456789" "0x31"
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assert xor "444444444444444444444444444" "0x34"
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assert xor "4444444444444444444444444444" "0x00"
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assert xor "444444444444444444444444444\n" "0x06"
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assert xor "Test string" "0x03"
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assert xor "Try not to laugh1!%&<>z" "0x0d"
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# Checked with https://gchq.github.io/CyberChef/#recipe=Fletcher-16_Checksum()
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assert fletcher "44" "0x9c68"
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assert fletcher "Test string" "0x6e5b"
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assert fletcher "4444444444444444444444444444" "0xcab5"
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assert fletcher "444444444444444444444444444\n" "0x3f4c"
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assert fletcher "Try not to laugh1!%&<>z" "0x137c"
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assert fletcher "123456789" "0x1ede"
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# Checked with https://emn178.github.io/online-tools/crc16.html
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assert crc "123456789" "0xbb3d"
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assert crc "4444444444444444444444444444" "0x5d9d"
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assert crc "Test string" "0x5e4c"
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assert crc "Try not to laugh1!%&<>z" "0x6579"
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assert crc "tEsTTa" "0x0763"
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# Big file tests
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head -c 128M </dev/urandom >bigfile.bin
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run_bench xor bigfile.bin
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run_bench fletcher bigfile.bin
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run_bench crc bigfile.bin
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echo "Create & check checksum..."
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head -c 16385 <(yes 4) > testfile.bin
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head -c 32766 <(yes KRIPER2004) >> testfile.bin
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./lab6_create-csum.c_run testfile.bin testfile.bin.crc8maxim
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echo "This should be OK..."
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./lab6_check-csum.c_run testfile.bin testfile.bin.crc8maxim
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echo "Spoiling the file..."
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sed 's/4KRIP/HELLO/' testfile.bin > testfile_broken.bin
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echo "This should NOT be OK..."
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./lab6_check-csum.c_run testfile_broken.bin testfile.bin.crc8maxim
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popd > /dev/null
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@ -0,0 +1,38 @@
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cmake_minimum_required(VERSION 3.16)
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set(CMAKE_C_STANDARD 11)
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# Lab name
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set(LAB_NAME "lab6")
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# Lab tasks
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list(APPEND SOURCE_FILES
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check-xor.c
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check-fletcher.c
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check-crc.c
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create-csum.c
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check-csum.c
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)
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list(APPEND NON_COMPILABLE_SRC
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.execme
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)
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### Here goes the template
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project("${LAB_NAME}" C)
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add_custom_target("${LAB_NAME}")
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foreach (file IN LISTS SOURCE_FILES)
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add_executable("${LAB_NAME}_${file}_run" "${file}")
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add_dependencies("${LAB_NAME}" "${LAB_NAME}_${file}_run")
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endforeach ()
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foreach (file IN LISTS NON_COMPILABLE_SRC)
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add_custom_command(
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TARGET "${LAB_NAME}" POST_BUILD
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DEPENDS "${file}"
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COMMAND ${CMAKE_COMMAND} -E copy
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"${CMAKE_CURRENT_SOURCE_DIR}/${file}"
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"${CMAKE_CURRENT_BINARY_DIR}/${file}"
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)
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endforeach ()
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@ -0,0 +1,3 @@
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# Лабораторная работа №6
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## Задание 1
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@ -0,0 +1,109 @@
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#include <stdbool.h>
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#include <stdint.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/time.h>
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#define USAGE_STRING "Usage: %s [-q] [-b] [--] [file [file...]]\n"
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#define MAX(a,b) ((a)>(b)?(a):(b))
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#define STR_EQ(a, b) (!strcmp((a),(b)))
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#define FATAL(fmt, ...) do {\
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fprintf(stderr,fmt,##__VA_ARGS__);\
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exit(1);\
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} while (0)
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#define WARNING(fmt, ...) fprintf(stderr,fmt,##__VA_ARGS__)
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static const uint16_t crc16_tab[256] = {
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0x0000, 0xc0c1, 0xc181, 0x0140, 0xc301, 0x03c0, 0x0280, 0xc241,
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0xc601, 0x06c0, 0x0780, 0xc741, 0x0500, 0xc5c1, 0xc481, 0x0440,
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0xcc01, 0x0cc0, 0x0d80, 0xcd41, 0x0f00, 0xcfc1, 0xce81, 0x0e40,
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0x0a00, 0xcac1, 0xcb81, 0x0b40, 0xc901, 0x09c0, 0x0880, 0xc841,
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0xd801, 0x18c0, 0x1980, 0xd941, 0x1b00, 0xdbc1, 0xda81, 0x1a40,
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0x1e00, 0xdec1, 0xdf81, 0x1f40, 0xdd01, 0x1dc0, 0x1c80, 0xdc41,
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0x1400, 0xd4c1, 0xd581, 0x1540, 0xd701, 0x17c0, 0x1680, 0xd641,
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0xd201, 0x12c0, 0x1380, 0xd341, 0x1100, 0xd1c1, 0xd081, 0x1040,
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0xf001, 0x30c0, 0x3180, 0xf141, 0x3300, 0xf3c1, 0xf281, 0x3240,
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0x3600, 0xf6c1, 0xf781, 0x3740, 0xf501, 0x35c0, 0x3480, 0xf441,
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0x3c00, 0xfcc1, 0xfd81, 0x3d40, 0xff01, 0x3fc0, 0x3e80, 0xfe41,
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0xfa01, 0x3ac0, 0x3b80, 0xfb41, 0x3900, 0xf9c1, 0xf881, 0x3840,
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0x2800, 0xe8c1, 0xe981, 0x2940, 0xeb01, 0x2bc0, 0x2a80, 0xea41,
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0xee01, 0x2ec0, 0x2f80, 0xef41, 0x2d00, 0xedc1, 0xec81, 0x2c40,
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0xe401, 0x24c0, 0x2580, 0xe541, 0x2700, 0xe7c1, 0xe681, 0x2640,
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0x2200, 0xe2c1, 0xe381, 0x2340, 0xe101, 0x21c0, 0x2080, 0xe041,
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0xa001, 0x60c0, 0x6180, 0xa141, 0x6300, 0xa3c1, 0xa281, 0x6240,
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0x6600, 0xa6c1, 0xa781, 0x6740, 0xa501, 0x65c0, 0x6480, 0xa441,
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0x6c00, 0xacc1, 0xad81, 0x6d40, 0xaf01, 0x6fc0, 0x6e80, 0xae41,
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0xaa01, 0x6ac0, 0x6b80, 0xab41, 0x6900, 0xa9c1, 0xa881, 0x6840,
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0x7800, 0xb8c1, 0xb981, 0x7940, 0xbb01, 0x7bc0, 0x7a80, 0xba41,
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0xbe01, 0x7ec0, 0x7f80, 0xbf41, 0x7d00, 0xbdc1, 0xbc81, 0x7c40,
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0xb401, 0x74c0, 0x7580, 0xb541, 0x7700, 0xb7c1, 0xb681, 0x7640,
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0x7200, 0xb2c1, 0xb381, 0x7340, 0xb101, 0x71c0, 0x7080, 0xb041,
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0x5000, 0x90c1, 0x9181, 0x5140, 0x9301, 0x53c0, 0x5280, 0x9241,
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0x9601, 0x56c0, 0x5780, 0x9741, 0x5500, 0x95c1, 0x9481, 0x5440,
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0x9c01, 0x5cc0, 0x5d80, 0x9d41, 0x5f00, 0x9fc1, 0x9e81, 0x5e40,
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0x5a00, 0x9ac1, 0x9b81, 0x5b40, 0x9901, 0x59c0, 0x5880, 0x9841,
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0x8801, 0x48c0, 0x4980, 0x8941, 0x4b00, 0x8bc1, 0x8a81, 0x4a40,
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0x4e00, 0x8ec1, 0x8f81, 0x4f40, 0x8d01, 0x4dc0, 0x4c80, 0x8c41,
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0x4400, 0x84c1, 0x8581, 0x4540, 0x8701, 0x47c0, 0x4680, 0x8641,
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0x8201, 0x42c0, 0x4380, 0x8341, 0x4100, 0x81c1, 0x8081, 0x4040
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};
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bool flag_end = false;
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bool quiet_mode = false;
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bool benchmark = false;
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int main(int argc, char *argv[]) {
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if (argc == 1) {
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FATAL(USAGE_STRING, argv[0]);
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}
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for (int i = 1; i < argc; ++i) {
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if (!flag_end) {
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if (argv[i][0] != '-') {
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flag_end = true;
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}
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else if (STR_EQ(argv[i], "--")) {
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flag_end = true;
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continue;
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} else {
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switch (argv[i][1]) {
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case 'q':
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quiet_mode = true;
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break;
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case 'b':
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benchmark = true;
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break;
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default:
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FATAL(USAGE_STRING, argv[0]);
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}
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continue;
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}
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}
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FILE *f = fopen(argv[i], "rb");
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if (f == NULL) {
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perror("fopen()");
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FATAL("Could not open %s\n", argv[i]);
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}
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struct timeval t0, t1;
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int c;
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uint16_t s = 0;
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gettimeofday(&t0, NULL);
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while ((c = fgetc(f)) != EOF) {
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s = crc16_tab[(s ^ (uint8_t) c) & 0xFF] ^ (s >> 8);
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}
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gettimeofday(&t1, NULL);
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if (quiet_mode) {
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printf("0x%04x\n", s);
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} else {
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printf("%s: checksum 0x%04x\n", argv[i], s);
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}
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if (benchmark) {
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struct timeval result;
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timersub(&t1, &t0, &result);
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printf("CRC execution time: %ld.%06lds\n", result.tv_sec, result.tv_usec);
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}
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fclose(f);
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}
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}
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@ -0,0 +1,68 @@
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#include <stdbool.h>
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#include <stdint.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "crc8.h"
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#define USAGE_STRING "Usage: %s <input_file> <checksum_file>\n"
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#define MAX(a,b) ((a)>(b)?(a):(b))
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#define STR_EQ(a, b) (!strcmp((a),(b)))
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#define WARNING(fmt, ...) fprintf(stderr,fmt,##__VA_ARGS__)
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#define FATAL(fmt, ...) do {\
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WARNING(fmt,##__VA_ARGS__);\
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exit(1);\
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} while (0)
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int main(int argc, char *argv[]) {
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if (argc != 3) {
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FATAL(USAGE_STRING, argv[0]);
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}
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FILE *f = fopen(argv[1], "rb");
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if (f == NULL) {
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perror("fopen()");
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FATAL("Could not open %s\n", argv[1]);
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}
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FILE *csfile = fopen(argv[2], "rb");
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if (csfile == NULL) {
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perror("fopen()");
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FATAL("Could not open %s\n", argv[2]);
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}
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int rsize = 0;
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uint8_t buf[4096] = {0};
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int blocks_read = 0;
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uint8_t s;
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uint8_t block_cs;
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while ((rsize = fread(buf, 1, 4096, f)) == 4096) {
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s = 0;
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for (int i = 0; i < 4096; ++i) {
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CRC8_MAXIM_ITER(s, buf[i]);
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}
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if (!fread(&block_cs, 1, 1, csfile)) {
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FATAL("Unexpected end of checksum file\n");
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}
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if (s != block_cs) {
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WARNING("Checksum mismatch at 4K-block #%d: got 0x%02x, expected 0x%02x\n", blocks_read, s, block_cs);
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}
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++blocks_read;
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}
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if (rsize > 0) {
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s = 0;
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for (int i = 0; i < rsize; ++i) {
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CRC8_MAXIM_ITER(s, buf[i]);
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}
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if (!fread(&block_cs, 1, 1, csfile)) {
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FATAL("Unexpected end of checksum file\n");
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}
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if (s != block_cs) {
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WARNING("Checksum mismatch at 4K-block #%d: got 0x%02x, expected 0x%02x\n", blocks_read, s, block_cs);
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}
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}
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fclose(f);
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fclose(csfile);
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}
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#include <stdbool.h>
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#include <stdint.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/time.h>
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#define USAGE_STRING "Usage: %s [-q] [-b] [--] [file [file...]]\n"
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#define MAX(a,b) ((a)>(b)?(a):(b))
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#define STR_EQ(a, b) (!strcmp((a),(b)))
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#define FATAL(fmt, ...) do {\
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fprintf(stderr,fmt,##__VA_ARGS__);\
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exit(1);\
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} while (0)
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#define WARNING(fmt, ...) fprintf(stderr,fmt,##__VA_ARGS__)
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bool flag_end = false;
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bool quiet_mode = false;
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bool benchmark = false;
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int main(int argc, char *argv[]) {
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if (argc == 1) {
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FATAL(USAGE_STRING, argv[0]);
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}
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for (int i = 1; i < argc; ++i) {
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if (!flag_end) {
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if (argv[i][0] != '-') {
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flag_end = true;
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}
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else if (STR_EQ(argv[i], "--")) {
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flag_end = true;
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continue;
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} else {
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switch (argv[i][1]) {
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case 'q':
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quiet_mode = true;
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break;
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case 'b':
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benchmark = true;
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break;
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default:
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FATAL(USAGE_STRING, argv[0]);
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}
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continue;
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}
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}
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FILE *f = fopen(argv[i], "rb");
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if (f == NULL) {
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perror("fopen()");
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FATAL("Could not open %s\n", argv[i]);
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}
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struct timeval t0, t1;
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int c;
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uint16_t s1 = 0, s2 = 0, s;
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gettimeofday(&t0, NULL);
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while ((c = fgetc(f)) != EOF) {
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s1 = (s1 + (uint8_t) c) % 255;
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s2 = (s2 + s1) % 255;
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}
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s = (s2 << 8) | s1;
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gettimeofday(&t1, NULL);
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if (quiet_mode) {
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printf("0x%04x\n", s);
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} else {
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printf("%s: checksum 0x%04x\n", argv[i], s);
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}
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if (benchmark) {
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struct timeval result;
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timersub(&t1, &t0, &result);
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printf("Fletcher execution time: %ld.%06lds\n", result.tv_sec, result.tv_usec);
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}
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fclose(f);
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}
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}
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@ -0,0 +1,74 @@
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#include <stdbool.h>
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#include <stdint.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/time.h>
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#define USAGE_STRING "Usage: %s [-q] [-b] [--] [file [file...]]\n"
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#define MAX(a,b) ((a)>(b)?(a):(b))
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#define STR_EQ(a, b) (!strcmp((a),(b)))
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#define FATAL(fmt, ...) do {\
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fprintf(stderr,fmt,##__VA_ARGS__);\
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exit(1);\
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} while (0)
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#define WARNING(fmt, ...) fprintf(stderr,fmt,##__VA_ARGS__)
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bool flag_end = false;
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bool quiet_mode = false;
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bool benchmark = false;
|
||||
|
||||
int main(int argc, char *argv[]) {
|
||||
if (argc == 1) {
|
||||
FATAL(USAGE_STRING, argv[0]);
|
||||
}
|
||||
|
||||
for (int i = 1; i < argc; ++i) {
|
||||
if (!flag_end) {
|
||||
if (argv[i][0] != '-') {
|
||||
flag_end = true;
|
||||
}
|
||||
else if (STR_EQ(argv[i], "--")) {
|
||||
flag_end = true;
|
||||
continue;
|
||||
} else {
|
||||
switch (argv[i][1]) {
|
||||
case 'q':
|
||||
quiet_mode = true;
|
||||
break;
|
||||
case 'b':
|
||||
benchmark = true;
|
||||
break;
|
||||
default:
|
||||
FATAL(USAGE_STRING, argv[0]);
|
||||
}
|
||||
continue;
|
||||
}
|
||||
}
|
||||
FILE *f = fopen(argv[i], "rb");
|
||||
if (f == NULL) {
|
||||
perror("fopen()");
|
||||
FATAL("Could not open %s\n", argv[i]);
|
||||
}
|
||||
struct timeval t0, t1;
|
||||
int c;
|
||||
uint8_t s = 0;
|
||||
gettimeofday(&t0, NULL);
|
||||
while ((c = fgetc(f)) != EOF) {
|
||||
s ^= (uint8_t) c;
|
||||
}
|
||||
gettimeofday(&t1, NULL);
|
||||
|
||||
if (quiet_mode) {
|
||||
printf("0x%02x\n", s);
|
||||
} else {
|
||||
printf("%s: checksum 0x%02x\n", argv[i], s);
|
||||
}
|
||||
if (benchmark) {
|
||||
struct timeval result;
|
||||
timersub(&t1, &t0, &result);
|
||||
printf("XOR execution time: %ld.%06lds\n", result.tv_sec, result.tv_usec);
|
||||
}
|
||||
fclose(f);
|
||||
}
|
||||
}
|
||||
|
|
@ -0,0 +1,42 @@
|
|||
#pragma once
|
||||
#include <stdint.h>
|
||||
|
||||
static const uint8_t crc8_maxim_table[256] = {
|
||||
0x00, 0x31, 0x62, 0x53, 0xC4, 0xF5, 0xA6, 0x97,
|
||||
0xB9, 0x88, 0xDB, 0xEA, 0x7D, 0x4C, 0x1F, 0x2E,
|
||||
0x43, 0x72, 0x21, 0x10, 0x87, 0xB6, 0xE5, 0xD4,
|
||||
0xFA, 0xCB, 0x98, 0xA9, 0x3E, 0x0F, 0x5C, 0x6D,
|
||||
0x86, 0xB7, 0xE4, 0xD5, 0x42, 0x73, 0x20, 0x11,
|
||||
0x3F, 0x0E, 0x5D, 0x6C, 0xFB, 0xCA, 0x99, 0xA8,
|
||||
0xC5, 0xF4, 0xA7, 0x96, 0x01, 0x30, 0x63, 0x52,
|
||||
0x7C, 0x4D, 0x1E, 0x2F, 0xB8, 0x89, 0xDA, 0xEB,
|
||||
0x3D, 0x0C, 0x5F, 0x6E, 0xF9, 0xC8, 0x9B, 0xAA,
|
||||
0x84, 0xB5, 0xE6, 0xD7, 0x40, 0x71, 0x22, 0x13,
|
||||
0x7E, 0x4F, 0x1C, 0x2D, 0xBA, 0x8B, 0xD8, 0xE9,
|
||||
0xC7, 0xF6, 0xA5, 0x94, 0x03, 0x32, 0x61, 0x50,
|
||||
0xBB, 0x8A, 0xD9, 0xE8, 0x7F, 0x4E, 0x1D, 0x2C,
|
||||
0x02, 0x33, 0x60, 0x51, 0xC6, 0xF7, 0xA4, 0x95,
|
||||
0xF8, 0xC9, 0x9A, 0xAB, 0x3C, 0x0D, 0x5E, 0x6F,
|
||||
0x41, 0x70, 0x23, 0x12, 0x85, 0xB4, 0xE7, 0xD6,
|
||||
0x7A, 0x4B, 0x18, 0x29, 0xBE, 0x8F, 0xDC, 0xED,
|
||||
0xC3, 0xF2, 0xA1, 0x90, 0x07, 0x36, 0x65, 0x54,
|
||||
0x39, 0x08, 0x5B, 0x6A, 0xFD, 0xCC, 0x9F, 0xAE,
|
||||
0x80, 0xB1, 0xE2, 0xD3, 0x44, 0x75, 0x26, 0x17,
|
||||
0xFC, 0xCD, 0x9E, 0xAF, 0x38, 0x09, 0x5A, 0x6B,
|
||||
0x45, 0x74, 0x27, 0x16, 0x81, 0xB0, 0xE3, 0xD2,
|
||||
0xBF, 0x8E, 0xDD, 0xEC, 0x7B, 0x4A, 0x19, 0x28,
|
||||
0x06, 0x37, 0x64, 0x55, 0xC2, 0xF3, 0xA0, 0x91,
|
||||
0x47, 0x76, 0x25, 0x14, 0x83, 0xB2, 0xE1, 0xD0,
|
||||
0xFE, 0xCF, 0x9C, 0xAD, 0x3A, 0x0B, 0x58, 0x69,
|
||||
0x04, 0x35, 0x66, 0x57, 0xC0, 0xF1, 0xA2, 0x93,
|
||||
0xBD, 0x8C, 0xDF, 0xEE, 0x79, 0x48, 0x1B, 0x2A,
|
||||
0xC1, 0xF0, 0xA3, 0x92, 0x05, 0x34, 0x67, 0x56,
|
||||
0x78, 0x49, 0x1A, 0x2B, 0xBC, 0x8D, 0xDE, 0xEF,
|
||||
0x82, 0xB3, 0xE0, 0xD1, 0x46, 0x77, 0x24, 0x15,
|
||||
0x3B, 0x0A, 0x59, 0x68, 0xFF, 0xCE, 0x9D, 0xAC
|
||||
};
|
||||
|
||||
#define CRC8_MAXIM_ITER(crc, chr) \
|
||||
do { \
|
||||
(crc) = crc8_maxim_table[(crc) ^ (chr)]; \
|
||||
} while (0)
|
||||
|
|
@ -0,0 +1,55 @@
|
|||
#include <stdbool.h>
|
||||
#include <stdint.h>
|
||||
#include <stdio.h>
|
||||
#include <stdlib.h>
|
||||
#include <string.h>
|
||||
#include "crc8.h"
|
||||
|
||||
#define USAGE_STRING "Usage: %s <input_file> <output_file>\n"
|
||||
#define MAX(a,b) ((a)>(b)?(a):(b))
|
||||
#define STR_EQ(a, b) (!strcmp((a),(b)))
|
||||
#define FATAL(fmt, ...) do {\
|
||||
fprintf(stderr,fmt,##__VA_ARGS__);\
|
||||
exit(1);\
|
||||
} while (0)
|
||||
#define WARNING(fmt, ...) fprintf(stderr,fmt,##__VA_ARGS__)
|
||||
|
||||
int main(int argc, char *argv[]) {
|
||||
if (argc != 3) {
|
||||
FATAL(USAGE_STRING, argv[0]);
|
||||
}
|
||||
|
||||
FILE *f = fopen(argv[1], "rb");
|
||||
if (f == NULL) {
|
||||
perror("fopen()");
|
||||
FATAL("Could not open %s\n", argv[1]);
|
||||
}
|
||||
|
||||
FILE *fw = fopen(argv[2], "wb");
|
||||
if (fw == NULL) {
|
||||
perror("fopen()");
|
||||
FATAL("Could not open %s\n", argv[2]);
|
||||
}
|
||||
|
||||
int rsize = 0;
|
||||
uint8_t buf[4096] = {0};
|
||||
uint8_t s;
|
||||
|
||||
while ((rsize = fread(buf, 1, 4096, f)) == 4096) {
|
||||
s = 0;
|
||||
for (int i = 0; i < 4096; ++i) {
|
||||
CRC8_MAXIM_ITER(s, buf[i]);
|
||||
}
|
||||
fwrite(&s, 1, 1, fw);
|
||||
}
|
||||
if (rsize > 0) {
|
||||
s = 0;
|
||||
for (int i = 0; i < rsize; ++i) {
|
||||
CRC8_MAXIM_ITER(s, buf[i]);
|
||||
}
|
||||
fwrite(&s, 1, 1, fw);
|
||||
}
|
||||
|
||||
fclose(f);
|
||||
fclose(fw);
|
||||
}
|
||||
Loading…
Reference in New Issue