https://perl5.git.perl.org / metaconfig.git / blame
| Commit | Line | Data |
|---|---|---|
| 959f3c4c JH |
1 | ?RCS: $Id: bitpbyte.U,v 3.0.1.1 1994/10/29 16:02:54 ram Exp $ |
| 2 | ?RCS: | |
| 3 | ?RCS: Copyright (c) 1991-1993, Raphael Manfredi | |
| 4 | ?RCS: | |
| 5 | ?RCS: You may redistribute only under the terms of the Artistic Licence, | |
| 6 | ?RCS: as specified in the README file that comes with the distribution. | |
| 7 | ?RCS: You may reuse parts of this distribution only within the terms of | |
| 8 | ?RCS: that same Artistic Licence; a copy of which may be found at the root | |
| 9 | ?RCS: of the source tree for dist 3.0. | |
| 10 | ?RCS: | |
| 11 | ?RCS: $Log: bitpbyte.U,v $ | |
| 12 | ?RCS: Revision 3.0.1.1 1994/10/29 16:02:54 ram | |
| 13 | ?RCS: patch36: added ?F: line for metalint file checking | |
| 14 | ?RCS: | |
| 15 | ?RCS: Revision 3.0 1993/08/18 12:05:27 ram | |
| 16 | ?RCS: Baseline for dist 3.0 netwide release. | |
| 17 | ?RCS: | |
| 18 | ?MAKE:bitpbyte: cat rm Myread +cc +ccflags | |
| 19 | ?MAKE: -pick add $@ %< | |
| 20 | ?S:bitpbyte: | |
| 21 | ?S: This variable contains the value of the BITS_PER_BYTE symbol, which | |
| 22 | ?S: indicates to the C program how many bits there are in a byte. | |
| 23 | ?S:. | |
| 24 | ?C:BITS_PER_BYTE: | |
| 25 | ?C: This symbol contains the number of bits in a byte, so that the C | |
| 26 | ?C: preprocessor can make decisions based on it. | |
| 27 | ?C:. | |
| 28 | ?H:#define BITS_PER_BYTE $bitpbyte /**/ | |
| 29 | ?H:. | |
| 30 | ?F:!try | |
| 31 | : check for length of byte | |
| 32 | echo " " | |
| 33 | case "$bitpbyte" in | |
| 34 | '') | |
| 35 | echo "Checking to see how many bits there are in a byte..." >&4 | |
| 36 | $cat >try.c <<'EOCP' | |
| 37 | #include <stdio.h> | |
| 38 | ?X: Standard C requires a macro CHAR_BIT in <limits.h> | |
| 39 | #ifdef __STDC__ | |
| 40 | #include <limits.h> | |
| 41 | #ifndef CHAR_BIT | |
| 42 | #define CHAR_BIT 8 | |
| 43 | #endif | |
| 44 | #ifndef BITSPERBYTE | |
| 45 | #define BITSPERBYTE CHAR_BIT | |
| 46 | #endif | |
| 47 | #else | |
| 48 | ?X: On non standard C, try with <values.h> | |
| 49 | #include <values.h> | |
| 50 | #ifndef BITSPERBYTE | |
| 51 | #define BITSPERBYTE 8 | |
| 52 | #endif | |
| 53 | #endif | |
| 54 | main() | |
| 55 | { | |
| 56 | printf("%d\n", BITSPERBYTE); | |
| 57 | } | |
| 58 | EOCP | |
| 59 | if $cc $ccflags try.c -o try >/dev/null 2>&1 ; then | |
| 60 | dflt=`./try` | |
| 61 | else | |
| 62 | dflt='8' | |
| 63 | echo "(I can't seem to compile the test program. Guessing...)" | |
| 64 | fi | |
| 65 | ;; | |
| 66 | *) | |
| 67 | dflt="$bitpbyte" | |
| 68 | ;; | |
| 69 | esac | |
| 70 | rp="What is the length of a byte (in bits)?" | |
| 71 | . ./myread | |
| 72 | bitpbyte="$ans" | |
| 73 | $rm -f try.c try | |
| 74 |