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annotate endianchk.c @ 667:f004877a3f51

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Whoops, add the missing endianchk.c
author Matti Hamalainen <ccr@tnsp.org>
date Mon, 15 Feb 2016 07:01:33 +0200
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children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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667
f004877a3f51 Whoops, add the missing endianchk.c
Matti Hamalainen <ccr@tnsp.org>
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1 #include <stdio.h>
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2
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3 int main(int argc, char *argv[])
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4 {
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5 int val = 0x01020304, ret;
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6 unsigned char *s = (unsigned char *) &val;
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7 char *name = argv[0];
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8 (void) argc;
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9
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10 if (sizeof(int) != 4)
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11 {
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12 fprintf(stderr, "%s: sizeof(int) is not 32 bits!\n", name);
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13 return -1;
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14 }
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16 if (s[0] == 0x01 && s[1] == 0x02 && s[2] == 0x03 && s[3] == 0x04)
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17 ret = 0;
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18 else
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19 if (s[0] == 0x04 && s[1] == 0x03 && s[2] == 0x02 && s[3] == 0x01)
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20 ret = 1;
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21 else
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22 {
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23 fprintf(stderr, "%s: Unsupported endianess.\n", name);
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24 return -2;
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25 }
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26
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27 printf(
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28 "#ifndef MY_CONFIG_H\n"
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29 "#define MY_CONFIG_H 1\n"
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30 "\n"
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31 "#define TH_BYTEORDER TH_%s_ENDIAN\n"
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32 "\n"
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33 "#endif /* MY_CONFIG_H */\n"
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34 ,
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35 ret ? "LITTLE" : "BIG"
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36 );
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37 return 0;
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38 }
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39