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//-----------------------------------------------------------------------------
// libmurmurhash was written by Fabian Klötzl, and is placed in the public
// domain. The author hereby disclaims copyright to this source code.
#include <err.h>
#include <errno.h>
#include <fcntl.h>
#include <inttypes.h>
#include <stddef.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/mman.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <unistd.h>
#include "murmurhash.h"
__attribute__((noreturn)) void usage(int exit_code);
int main(int argc, char *argv[])
{
const char *file_name = NULL;
int opt = 0;
while ((opt = getopt(argc, argv, "h")) != -1) {
if (opt == 'h') {
usage(EXIT_SUCCESS);
}
if (opt == '?') {
usage(EXIT_FAILURE);
}
}
argc -= optind, argv += optind;
if (argc == 0) {
usage(EXIT_FAILURE);
}
file_name = argv[0];
int fd = open(file_name, O_RDONLY);
if (fd == -1) {
err(errno, "%s: failed to open file", file_name);
}
struct stat sb;
if (fstat(fd, &sb) == -1) {
err(errno, "%s: failed to get stats", file_name);
}
size_t length = sb.st_size;
void *data = mmap(NULL, length, PROT_READ, MAP_SHARED, fd, 0);
if (data == (void *)-1) {
err(errno, "%s: failed to map file", file_name);
}
// new interface
uint32_t hash4;
lmmh_x86_32(data, length, 0, &hash4);
printf("%" PRIx32 "", hash4);
uint32_t hash5[4];
lmmh_x86_128(data, length, 0, hash5);
printf(" ");
for (int i = 0; i < 4; i++) {
printf("%" PRIx32 "", hash5[i]);
}
uint64_t hash6[2];
lmmh_x64_128(data, length, 0, hash6);
printf(" ");
for (int i = 0; i < 2; i++) {
printf("%" PRIx64 "", hash6[i]);
}
printf("\n");
munmap(data, length);
close(fd);
return 0;
}
void usage(int exit_code)
{
static const char str[] = {
"mmh FILE\n"
"Compute the murmurhash of a file.\n\n"
" -h Print help\n" //
};
fprintf(exit_code == EXIT_SUCCESS ? stdout : stderr, str);
exit(exit_code);
}
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