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/*
* A pre-compilation helper program to aid in the creation of rounding.h.
*
* Copyright (C) 2007 Wayne Davison
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 3 as
* published by the Free Software Foundation.
*
* 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, visit the http://fsf.org website.
*/
#include "rsync.h"
struct test1 {
union file_extras extras1[1];
struct {
# include "mkrounding.h"
} file;
};
struct test2 {
union file_extras extras2[2];
struct {
# include "mkrounding.h"
} file;
};
struct test4 {
union file_extras extras4[4];
struct {
# include "mkrounding.h"
} file;
};
#define SIZE_TEST(n) (sizeof (struct test ## n) == EXTRA_LEN * n + sizeof (struct file_struct))
int main(UNUSED(int argc), UNUSED(char *argv[]))
{
int cnt;
if (SIZE_TEST(1))
cnt = 0;
else if (SIZE_TEST(2))
cnt = 1;
else if (SIZE_TEST(4))
cnt = 3;
else {
fprintf(stderr, "Unable to determine required file_extras rounding!\n");
cnt = 3;
}
if (cnt)
fprintf(stderr, "Rounding file_extras in multiples of %d", cnt + 1);
else
fprintf(stderr, "No rounding needed for file_extras");
fprintf(stderr, " (EXTRA_LEN=%d, FILE_STRUCT_LEN=%d)\n",
(int)EXTRA_LEN, (int)FILE_STRUCT_LEN);
printf("#define EXTRA_ROUNDING %d\n", cnt);
return 0;
}
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