| 1 | /* |
| 2 | * A pre-compilation helper program to aid in the creation of rounding.h. |
| 3 | * |
| 4 | * Copyright (C) 2007 Wayne Davison |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License as published by |
| 8 | * the Free Software Foundation; either version 3 of the License, or |
| 9 | * (at your option) any later version. |
| 10 | * |
| 11 | * This program is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | * GNU General Public License for more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU General Public License along |
| 17 | * with this program; if not, visit the http://fsf.org website. |
| 18 | */ |
| 19 | |
| 20 | #include "rsync.h" |
| 21 | |
| 22 | struct test1 { |
| 23 | union file_extras extras1[1]; |
| 24 | struct { |
| 25 | # include "mkrounding.h" |
| 26 | } file; |
| 27 | }; |
| 28 | |
| 29 | struct test2 { |
| 30 | union file_extras extras2[2]; |
| 31 | struct { |
| 32 | # include "mkrounding.h" |
| 33 | } file; |
| 34 | }; |
| 35 | |
| 36 | struct test4 { |
| 37 | union file_extras extras4[4]; |
| 38 | struct { |
| 39 | # include "mkrounding.h" |
| 40 | } file; |
| 41 | }; |
| 42 | |
| 43 | #define SIZE_TEST(n) (sizeof (struct test ## n) == EXTRA_LEN * n + sizeof (struct file_struct)) |
| 44 | |
| 45 | int main(UNUSED(int argc), UNUSED(char *argv[])) |
| 46 | { |
| 47 | int cnt; |
| 48 | if (SIZE_TEST(1)) |
| 49 | cnt = 0; |
| 50 | else if (SIZE_TEST(2)) |
| 51 | cnt = 1; |
| 52 | else if (SIZE_TEST(4)) |
| 53 | cnt = 3; |
| 54 | else { |
| 55 | fprintf(stderr, "Unable to determine required file_extras rounding!\n"); |
| 56 | cnt = 3; |
| 57 | } |
| 58 | if (cnt) |
| 59 | fprintf(stderr, "Rounding file_extras in multiples of %d", cnt + 1); |
| 60 | else |
| 61 | fprintf(stderr, "No rounding needed for file_extras"); |
| 62 | fprintf(stderr, " (EXTRA_LEN=%d, FILE_STRUCT_LEN=%d)\n", |
| 63 | (int)EXTRA_LEN, (int)FILE_STRUCT_LEN); |
| 64 | printf("#define EXTRA_ROUNDING %d\n", cnt); |
| 65 | return 0; |
| 66 | } |