49 lines
982 B
C
49 lines
982 B
C
#include <stdio.h>
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char bytes_reversed = 0;
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char words_reversed = 0;
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char char_unsigned = 0;
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/*
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* Determine the byte/word order in shorts/longs, assuming the size of a short
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* is 2 chars, and the size of a long is 4 chars. Not all theoretical
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* possibilities are tested; only bytes reversed and/or words reversed.
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*/
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determine_ordering()
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{
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short s;
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long l;
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register char *cp;
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register short *sp;
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cp = (char *)&s;
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cp[0] = 0x01; cp[1] = 0x02;
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if (s != 0x01 + (0x02 << 8))
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bytes_reversed = 1;
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sp = (short *)&l;
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sp[0] = 0x0001; sp[1] = 0x0002;
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if (l != 0x0001 + (0x0002L << 16))
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words_reversed = 1;
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}
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/*
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* determine whether characters are unsigned or signed
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*/
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uns_char()
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{
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char c = 0200;
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int i = c;
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if (i > 0) char_unsigned = 1;
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}
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main()
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{
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determine_ordering();
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uns_char();
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printf("#define BYTES_REVERSED %d\n", bytes_reversed);
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printf("#define WORDS_REVERSED %d\n", words_reversed);
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printf("#define CHAR_UNSIGNED %d\n", char_unsigned);
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return 0;
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}
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