152 lines
3.8 KiB
C
152 lines
3.8 KiB
C
#include <fcntl.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <stdbool.h>
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#include <stddef.h>
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#include <time.h>
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#include <unistd.h>
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#include <xmmintrin.h>
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#include <errno.h>
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#include <immintrin.h>
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#include <stdint.h>
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#include <getopt.h>
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// The file "testfile" should lead to this hash: fc982e558db259f298b43cd4c1241c66
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void md2_checksum(size_t len, uint8_t* buf) {
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}
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void md2_hash(size_t len, const uint8_t buf[len], uint8_t out[16]) {
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}
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static uint8_t* read_file(const char* path, size_t* size) {
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// Read the contents of the file specified by path into a heap-allocated
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// buffer and return a pointer to that buffer.
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FILE* f = fopen(path, "r");
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if(f == NULL) {
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printf("Fopen error: %d\n", errno);
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fclose(f);
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return NULL;
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}
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struct stat statOfFile;
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int status = fstat(fileno(f), &statOfFile);
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if(status == -1) {
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printf("Fstat error: %d\n", errno);
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fclose(f);
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return NULL;
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};
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if((statOfFile.st_mode & S_IFMT) != S_IFREG){
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printf("File is not a regular file!\n");
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fclose(f);
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return NULL;
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}
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uint8_t* data = malloc(statOfFile.st_size);
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size_t bytesRead = fread(data, statOfFile.st_blksize, statOfFile.st_blocks, f);
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// Or: size_t bytesRead = fread(data, sizeof(char), statOfFile.st_size, f);
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if(bytesRead != 0 && !feof(f)) {
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printf("Error reading file!\n");
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fclose(f);
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return NULL;
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}
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fclose(f);
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(*size) = bytesRead;
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return data;
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}
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int stringToInt(char* string) {
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char* leftover = "";
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errno = 0;
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int x = strtold(string, &leftover);
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if(*leftover != '\0' || leftover == string) {
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errno = EINVAL;
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return -1;
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}
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if(errno == ERANGE) {
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printf("Number is too large or too small!\n");
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errno = EINVAL;
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return -1;
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}
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errno = 0;
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return x;
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}
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void help(char* progname) {
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fprintf(stderr, "usage: %s [-V implementation] [-B [repetitons]] [-h] [--help] file\n", progname);
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}
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int main(int argc, char** argv) {
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int opt;
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int implementationTosUse = 0;
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int doBenchmark = 0;
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int benchmarkingCycles = 1;
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while (1) {
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static struct option longOptions[] =
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{
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/* These options set a flag. */
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{"help", no_argument, NULL, 'h'},
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NULL
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};
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int longOptionIndex = 0;
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opt = getopt_long(argc, argv, "V:B::h", longOptions, &longOptionIndex);
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if(-1 == opt)
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break;
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switch (opt) {
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case 'B':
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doBenchmark = 1;
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if(optarg != NULL) {
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benchmarkingCycles = stringToInt(optarg);
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if(errno == 0) break;
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fprintf(stderr, "%s: invalid argument, has to be int -- 'B' got '%s'\n", argv[0], optarg);
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help(argv[0]);
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return EXIT_FAILURE;
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}
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break;
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case 'V':
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implementationTosUse = stringToInt(optarg);
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if(errno == 0) break;
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fprintf(stderr, "%s: invalid argument, has to be int -- 'V' got '%s'\n", argv[0], optarg);
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help(argv[0]);
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return EXIT_FAILURE;
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case 'h':
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help(argv[0]);
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return EXIT_SUCCESS;
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default:
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help(argv[0]);
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return EXIT_FAILURE;
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}
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}
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char* filename = "";
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if(argc > optind) {
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filename = argv[optind];
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}
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else {
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fprintf(stderr, "%s: missing poisional argument -- 'file'\n", argv[0]);
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help(argv[0]);
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return EXIT_FAILURE;
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}
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printf("Hashing file: %s\nUsing implementation: %d, doing benchmark: %d, benchmark cycles: %d\n", filename, implementationTosUse, doBenchmark, benchmarkingCycles);
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return 0;
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}
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