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/*
* test_encoding.cc: Part of GNU CSSC.
*
* Copyright (C) 1997, 1998, 2007, 2010, 2011, 2013, 2019 Free Software
* Foundation, Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <cstdio>
#include <cstddef>
#include <cstring>
#include <cstdlib>
#include "bodyio.h"
using encoding_impl::decode;
using encoding_impl::encode;
int
test_encode(void)
{
return encode_stream(stdin, stdout);
}
int
test_decode(void)
{
char inbuf[80], outbuf[80];
while ( 0 != fgets(inbuf, sizeof(inbuf)-1, stdin) )
{
int len = decode_line(inbuf, outbuf);
if (0 == len)
return 0;
fwrite(outbuf, 1, len, stdout);
}
return 1;
}
// Test all possible inputs for encode(); decode its
// outputs and check that they decode back to the correct value.
int test_all(void)
{
union lunch { long l; char ch[4]; } in, out;
long i;
// i only has to hlod a 24-bit value.
const long maxval = 0xff | (0xff<<8) | (0xff<<16);
const double dmaxval = maxval;
for (i=0; i<=maxval; i++)
{
if ( 0x7FFFF == (i & 0x7FFFF) )
{
double completed = (100.0 * i) / dmaxval;
printf("%06lx %3.0f%%...\n", i, completed);
}
in.ch[0] = (i & 0x0000ff) >> 0;
in.ch[1] = (i & 0x00ff00) >> 8;
in.ch[2] = (i & 0xff0000) >> 16;
in.ch[3] = '\0';
encode(in.ch, out.ch);
decode(out.ch, in.ch);
const long l0 = ((unsigned char) in.ch[0]) & 0xff;
const long l1 = ((unsigned char) in.ch[1]) & 0xff;
const long l2 = ((unsigned char) in.ch[2]) & 0xff;
const long lo = l0 | l1<<8 | l2<<16;
if (lo != i)
{
fprintf(stderr,
"Asymmetry!\n"
"Input was %06lx, output was %05lx\n",
i, lo);
return 1;
}
}
printf("Success!\n");
return 0;
}
const char *options[] = { "--encode", "--decode", "--all" };
int (* const actions[])(void) = { test_encode, test_decode, test_all };
#define NELEM(array) (sizeof(array)/sizeof(array[0]))
static void
usage(const char *prog)
{
fprintf(stderr, "Usage: %s [", prog);
for (size_t i=0; i<NELEM(options); ++i)
{
fprintf(stderr, "%s %s", (i>0) ? " |" : "", options[i]);
}
fprintf(stderr, " ]\n");
}
int
main(int argc, char *argv[])
{
if (2 == argc)
{
for (size_t i=0; i<NELEM(options); ++i)
if (0 == strcmp(options[i], argv[1]))
return (actions[i])();
}
else if (1 == argc)
{
// No options specified; the default is to perform the sanity test.
return test_all();
}
else
{
usage(argv[0] ? argv[0] : "encoding-test");
}
return 1;
}
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