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Diffstat (limited to 'mcon/U/bitpbyte.U')
| -rw-r--r-- | mcon/U/bitpbyte.U | 74 |
1 files changed, 74 insertions, 0 deletions
diff --git a/mcon/U/bitpbyte.U b/mcon/U/bitpbyte.U new file mode 100644 index 0000000..cdd2c05 --- /dev/null +++ b/mcon/U/bitpbyte.U @@ -0,0 +1,74 @@ +?RCS: $Id$ +?RCS: +?RCS: Copyright (c) 1991-1997, 2004-2006, Raphael Manfredi +?RCS: +?RCS: You may redistribute only under the terms of the Artistic License, +?RCS: as specified in the README file that comes with the distribution. +?RCS: You may reuse parts of this distribution only within the terms of +?RCS: that same Artistic License; a copy of which may be found at the root +?RCS: of the source tree for dist 4.0. +?RCS: +?RCS: $Log: bitpbyte.U,v $ +?RCS: Revision 3.0.1.1 1994/10/29 16:02:54 ram +?RCS: patch36: added ?F: line for metalint file checking +?RCS: +?RCS: Revision 3.0 1993/08/18 12:05:27 ram +?RCS: Baseline for dist 3.0 netwide release. +?RCS: +?MAKE:bitpbyte: cat rm Myread +cc +ccflags +?MAKE: -pick add $@ %< +?S:bitpbyte: +?S: This variable contains the value of the BITS_PER_BYTE symbol, which +?S: indicates to the C program how many bits there are in a byte. +?S:. +?C:BITS_PER_BYTE: +?C: This symbol contains the number of bits in a byte, so that the C +?C: preprocessor can make decisions based on it. +?C:. +?H:#define BITS_PER_BYTE $bitpbyte /**/ +?H:. +?F:!try +: check for length of byte +echo " " +case "$bitpbyte" in +'') + echo "Checking to see how many bits there are in a byte..." >&4 + $cat >try.c <<'EOCP' +#include <stdio.h> +?X: Standard C requires a macro CHAR_BIT in <limits.h> +#ifdef __STDC__ +#include <limits.h> +#ifndef CHAR_BIT +#define CHAR_BIT 8 +#endif +#ifndef BITSPERBYTE +#define BITSPERBYTE CHAR_BIT +#endif +#else +?X: On non standard C, try with <values.h> +#include <values.h> +#ifndef BITSPERBYTE +#define BITSPERBYTE 8 +#endif +#endif +int main() +{ + printf("%d\n", BITSPERBYTE); +} +EOCP + if $cc $ccflags -o try try.c >/dev/null 2>&1 ; then + dflt=`./try` + else + dflt='8' + echo "(I can't seem to compile the test program. Guessing...)" + fi + ;; +*) + dflt="$bitpbyte" + ;; +esac +rp="What is the length of a byte (in bits)?" +. ./myread +bitpbyte="$ans" +$rm -f try.c try + |