42 lines
1.1 KiB
C
42 lines
1.1 KiB
C
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/*
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(c) copyright 1988 by the Vrije Universiteit, Amsterdam, The Netherlands.
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See the copyright notice in the ACK home directory, in the file "Copyright".
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*/
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/* $Header$ */
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#include <byte_order.h>
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#if CHAR_UNSIGNED
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#define Xchar(ch) (ch)
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#else
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#define Xchar(ch) ((ch) & 0377)
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#endif
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#define BYTES_REVERSED (MSB_AT_LOW_ADDRESS != FL_MSB_AT_LOW_ADDRESS)
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#define WORDS_REVERSED (MSW_AT_LOW_ADDRESS != FL_MSW_AT_LOW_ADDRESS)
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#define LONGS_REVERSED (FL_MSL_AT_LOW_ADDRESS)
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#if BYTES_REVERSED
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#define uget2(c) (Xchar((c)[1]) | ((unsigned) Xchar((c)[0]) << 8))
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#define Xput2(i, c) (((c)[1] = (i)), ((c)[0] = (i) >> 8))
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#define put2(i, c) { register int j = (i); Xput2(j, c); }
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#else
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#define uget2(c) (* ((unsigned short *) (c)))
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#define Xput2(i, c) (* ((short *) (c)) = (i))
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#define put2(i, c) Xput2(i, c)
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#endif
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#define get2(c) ((short) uget2(c))
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#if WORDS_REVERSED || BYTES_REVERSED
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#define get4(c) (uget2((c)+2) | ((long) uget2(c) << 16))
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#define put4(l, c) { register long x=(l); \
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Xput2((int)x,(c)+2); \
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Xput2((int)(x>>16),(c)); \
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}
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#else
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#define get4(c) (* ((long *) (c)))
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#define put4(l, c) (* ((long *) (c)) = (l))
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#endif
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