67 lines
1.7 KiB
C
67 lines
1.7 KiB
C
/*
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* A pre-compilation helper program to aid in the creation of rounding.h.
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*
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* Copyright (C) 2007 Wayne Davison
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, visit the http://fsf.org website.
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*/
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#include "rsync.h"
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struct test1 {
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union file_extras extras1[1];
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struct {
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# include "mkrounding.h"
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} file;
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};
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struct test2 {
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union file_extras extras2[2];
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struct {
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# include "mkrounding.h"
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} file;
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};
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struct test4 {
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union file_extras extras4[4];
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struct {
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# include "mkrounding.h"
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} file;
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};
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#define SIZE_TEST(n) (sizeof (struct test ## n) == EXTRA_LEN * n + sizeof (struct file_struct))
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int main(UNUSED(int argc), UNUSED(char *argv[]))
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{
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int cnt;
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if (SIZE_TEST(1))
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cnt = 0;
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else if (SIZE_TEST(2))
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cnt = 1;
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else if (SIZE_TEST(4))
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cnt = 3;
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else {
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fprintf(stderr, "Unable to determine required file_extras rounding!\n");
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cnt = 3;
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}
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if (cnt)
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fprintf(stderr, "Rounding file_extras in multiples of %d", cnt + 1);
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else
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fprintf(stderr, "No rounding needed for file_extras");
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fprintf(stderr, " (EXTRA_LEN=%d, FILE_STRUCT_LEN=%d)\n",
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(int)EXTRA_LEN, (int)FILE_STRUCT_LEN);
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printf("#define EXTRA_ROUNDING %d\n", cnt);
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return 0;
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}
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