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/*
* checksum.c - Adler-32 and CRC-32 checksumming program
*
* Copyright 2016 Eric Biggers
*
* Permission is hereby granted, free of charge, to any person
* obtaining a copy of this software and associated documentation
* files (the "Software"), to deal in the Software without
* restriction, including without limitation the rights to use,
* copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following
* conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
* OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*/
#include "test_util.h"
static const tchar *const optstring = T("Ahs:tZ");
static void
show_usage(FILE *fp)
{
fprintf(fp,
"Usage: %"TS" [-A] [-h] [-s SIZE] [-t] [-Z] [FILE]...\n"
"Calculate Adler-32 or CRC-32 checksums of the specified FILEs.\n"
"\n"
"Options:\n"
" -A use Adler-32 (default is CRC-32)\n"
" -h print this help\n"
" -s SIZE chunk size\n"
" -t show checksum speed, excluding I/O\n"
" -Z use zlib implementation instead of libdeflate\n",
prog_invocation_name);
}
typedef u32 (*cksum_fn_t)(u32, const void *, size_t);
static u32
adler32_libdeflate(u32 adler, const void *buf, size_t len)
{
return libdeflate_adler32(adler, buf, len);
}
static u32
crc32_libdeflate(u32 crc, const void *buf, size_t len)
{
return libdeflate_crc32(crc, buf, len);
}
static u32
adler32_zlib(u32 adler, const void *buf, size_t len)
{
return adler32(adler, buf, len);
}
static u32
crc32_zlib(u32 crc, const void *buf, size_t len)
{
return crc32(crc, buf, len);
}
static int
checksum_stream(struct file_stream *in, cksum_fn_t cksum, u32 *sum,
void *buf, size_t bufsize, u64 *size_ret, u64 *elapsed_ret)
{
u64 size = 0;
u64 elapsed = 0;
for (;;) {
ssize_t ret;
u64 start_time;
ret = xread(in, buf, bufsize);
if (ret < 0)
return ret;
if (ret == 0)
break;
size += ret;
start_time = timer_ticks();
*sum = cksum(*sum, buf, ret);
elapsed += timer_ticks() - start_time;
}
if (elapsed == 0)
elapsed = 1;
*size_ret = size;
*elapsed_ret = elapsed;
return 0;
}
int
tmain(int argc, tchar *argv[])
{
bool use_adler32 = false;
bool use_zlib_impl = false;
bool do_timing = false;
void *buf;
size_t bufsize = 131072;
tchar *default_file_list[] = { NULL };
cksum_fn_t cksum;
int opt_char;
int i;
int ret;
begin_program(argv);
while ((opt_char = tgetopt(argc, argv, optstring)) != -1) {
switch (opt_char) {
case 'A':
use_adler32 = true;
break;
case 'h':
show_usage(stdout);
return 0;
case 's':
bufsize = tstrtoul(toptarg, NULL, 10);
if (bufsize == 0) {
msg("invalid chunk size: \"%"TS"\"", toptarg);
return 1;
}
break;
case 't':
do_timing = true;
break;
case 'Z':
use_zlib_impl = true;
break;
default:
show_usage(stderr);
return 1;
}
}
argc -= toptind;
argv += toptind;
if (use_adler32) {
if (use_zlib_impl)
cksum = adler32_zlib;
else
cksum = adler32_libdeflate;
} else {
if (use_zlib_impl)
cksum = crc32_zlib;
else
cksum = crc32_libdeflate;
}
buf = xmalloc(bufsize);
if (buf == NULL)
return 1;
if (argc == 0) {
argv = default_file_list;
argc = ARRAY_LEN(default_file_list);
} else {
for (i = 0; i < argc; i++)
if (argv[i][0] == '-' && argv[i][1] == '\0')
argv[i] = NULL;
}
for (i = 0; i < argc; i++) {
struct file_stream in;
u32 sum = cksum(0, NULL, 0);
u64 size = 0;
u64 elapsed = 0;
ret = xopen_for_read(argv[i], true, &in);
if (ret != 0)
goto out;
ret = checksum_stream(&in, cksum, &sum, buf, bufsize,
&size, &elapsed);
if (ret == 0) {
if (do_timing) {
printf("%08"PRIx32"\t%"TS"\t"
"%"PRIu64" ms\t%"PRIu64" MB/s\n",
sum, in.name, timer_ticks_to_ms(elapsed),
timer_MB_per_s(size, elapsed));
} else {
printf("%08"PRIx32"\t%"TS"\t\n", sum, in.name);
}
}
xclose(&in);
if (ret != 0)
goto out;
}
ret = 0;
out:
free(buf);
return -ret;
}
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