| 1 | ?RCS: $Id: cpp_stuff.U,v 3.0.1.1 1994/10/29 16:08:24 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: cpp_stuff.U,v $ |
| 12 | ?RCS: Revision 3.0.1.1 1994/10/29 16:08:24 ram |
| 13 | ?RCS: patch36: now uses cppstdin instead of plain cpp for consistency (ADO) |
| 14 | ?RCS: patch36: remove temporary files when done |
| 15 | ?RCS: |
| 16 | ?RCS: Revision 3.0 1993/08/18 12:05:36 ram |
| 17 | ?RCS: Baseline for dist 3.0 netwide release. |
| 18 | ?RCS: |
| 19 | ?MAKE:cpp_stuff: cat contains cppstdin cppflags cppminus rm |
| 20 | ?MAKE: -pick add $@ %< |
| 21 | ?S:cpp_stuff: |
| 22 | ?S: This variable contains an identification of the concatenation mechanism |
| 23 | ?S: used by the C preprocessor. |
| 24 | ?S:. |
| 25 | ?C:CAT2: |
| 26 | ?C: This macro concatenates 2 tokens together. |
| 27 | ?C:. |
| 28 | ?C:CAT3: |
| 29 | ?C: This macro concatenates 3 tokens together. |
| 30 | ?C:. |
| 31 | ?C:CAT4: |
| 32 | ?C: This macro concatenates 4 tokens together. |
| 33 | ?C:. |
| 34 | ?C:CAT5: |
| 35 | ?C: This macro concatenates 5 tokens together. |
| 36 | ?C:. |
| 37 | ?C:STRINGIFY: |
| 38 | ?C: This macro surrounds its token with double quotes. |
| 39 | ?C:. |
| 40 | ?C:SCAT2: |
| 41 | ?C: This macro concatenates 2 tokens together and stringifies the result. |
| 42 | ?C: It might not exist, so #ifdef it in your code! |
| 43 | ?C:. |
| 44 | ?C:SCAT3: |
| 45 | ?C: This macro concatenates 3 tokens together and stringifies the result. |
| 46 | ?C: It might not exist, so #ifdef it in your code! |
| 47 | ?C:. |
| 48 | ?C:SCAT4: |
| 49 | ?C: This macro concatenates 4 tokens together and stringifies the result. |
| 50 | ?C: It might not exist, so #ifdef it in your code! |
| 51 | ?C:. |
| 52 | ?C:SCAT5: |
| 53 | ?C: This macro concatenates 5 tokens together and stringifies the result. |
| 54 | ?C: It might not exist, so #ifdef it in your code! |
| 55 | ?C:. |
| 56 | ?X: Dist pl70 included the following, but AIX's xlc compiler |
| 57 | ?X: (which is ANSI-ish and has cpp_stuff == 42)) rejects |
| 58 | ?X: The SQuoTe/EQuoTe stuff because the string literals are on |
| 59 | ?X: separate lines. Sigh. |
| 60 | ?X: Andy Dougherty 24 Feb 1998 |
| 61 | ?X: ?H:?%<:#if $cpp_stuff == 1 |
| 62 | ?X: ?H:?CAT2:#define CAT2(a,b)a/**/b |
| 63 | ?X: ?H:?CAT3:#define CAT3(a,b,c)a/**/b/**/c |
| 64 | ?X: ?H:?CAT4:#define CAT4(a,b,c,d)a/**/b/**/c/**/d |
| 65 | ?X: ?H:?CAT5:#define CAT5(a,b,c,d,e)a/**/b/**/c/**/d/**/e |
| 66 | ?X: ?H:?STRINGIFY:#define STRINGIFY(a)"a" |
| 67 | ?X: ?H:?%<:#define SQuoTe(a)"a |
| 68 | ?X: ?H:?%<:#define EQuoTe(a)a" |
| 69 | ?X: ?H:?SCAT2:#define SCAT2(a,b)EQuoTe(SQuoTe(a)b) |
| 70 | ?X: ?H:?SCAT3:#define SCAT3(a,b,c)EQuoTe(SQuoTe(a)b/**/c) |
| 71 | ?X: ?H:?SCAT4:#define SCAT4(a,b,c,d)EQuoTe(SQuoTe(a)b/**/c/**/d) |
| 72 | ?X: ?H:?SCAT5:#define SCAT5(a,b,c,d,e)EQuoTe(SQuoTe(a)b/**/c/**/d/**/e) |
| 73 | ?X: ?H:?%<:#endif |
| 74 | ?H:?%<:#if $cpp_stuff == 1 |
| 75 | ?H:?CAT2:#define CAT2(a,b) a/**/b |
| 76 | ?H:?CAT3:#define CAT3(a,b,c) a/**/b/**/c |
| 77 | ?H:?CAT4:#define CAT4(a,b,c,d) a/**/b/**/c/**/d |
| 78 | ?H:?CAT5:#define CAT5(a,b,c,d,e) a/**/b/**/c/**/d/**/e |
| 79 | ?H:?STRINGIFY:#define STRINGIFY(a) "a" |
| 80 | ?H:?%<: /* If you can get stringification with catify, tell me how! */ |
| 81 | ?H:?%<:#endif |
| 82 | ?H:?%<:#if $cpp_stuff == 42 |
| 83 | ?H:?%<:#define PeRl_CaTiFy(a, b) a ## b |
| 84 | ?H:?%<:#define PeRl_StGiFy(a) #a |
| 85 | ?H:?%<:/* the additional level of indirection enables these macros to be |
| 86 | ?H:?%<: * used as arguments to other macros. See K&R 2nd ed., page 231. */ |
| 87 | ?H:?CAT2:#define CAT2(a,b) PeRl_CaTiFy(a,b) |
| 88 | ?H:?CAT3:#define CAT3(a,b,c) CAT2(PeRl_CaTiFy(a,b),c) |
| 89 | ?H:?CAT4:#define CAT4(a,b,c,d) CAT2(CAT3(a,b,c),d) |
| 90 | ?H:?CAT5:#define CAT5(a,b,c,d,e) CAT2(CAT4(a,b,c,d),e) |
| 91 | ?H:?%<:#define StGiFy(a) PeRl_StGiFy(a) |
| 92 | ?H:?STRINGIFY:#define STRINGIFY(a) PeRl_StGiFy(a) |
| 93 | ?H:?SCAT2:#define SCAT2(a,b) PeRl_StGiFy(a) PeRl_StGiFy(b) |
| 94 | ?H:?SCAT3:#define SCAT3(a,b,c) PeRl_StGiFy(a) PeRl_StGiFy(b) PeRl_StGiFy(c) |
| 95 | ?H:?SCAT4:#define SCAT4(a,b,c,d) PeRl_StGiFy(a) PeRl_StGiFy(b) PeRl_StGiFy(c) PeRl_StGiFy(d) |
| 96 | ?H:?SCAT5:#define SCAT5(a,b,c,d,e) PeRl_StGiFy(a) PeRl_StGiFy(b) PeRl_StGiFy(c) PeRl_StGiFy(d) PeRl_StGiFy(e) |
| 97 | ?H:?%<:#endif |
| 98 | ?H:?%<:#if $cpp_stuff != 1 && $cpp_stuff != 42 |
| 99 | ?H:?%<:# include "Bletch: How does this C preprocessor concatenate tokens?" |
| 100 | ?H:?%<:#endif |
| 101 | ?H:. |
| 102 | ?W:%<:CAT2 CAT3 CAT4 CAT5 STRINGIFY SCAT2 SCAT3 SCAT4 SCAT5 |
| 103 | ?LINT:known StGiFy |
| 104 | ?LINT:known PeRl_CaTiFy |
| 105 | ?LINT:known PeRl_StGiFy |
| 106 | : how do we concatenate cpp tokens here? |
| 107 | echo " " |
| 108 | echo "Checking to see how your cpp does stuff like concatenate tokens..." >&4 |
| 109 | $cat >cpp_stuff.c <<'EOCP' |
| 110 | #define RCAT(a,b)a/**/b |
| 111 | #define ACAT(a,b)a ## b |
| 112 | RCAT(Rei,ser) |
| 113 | ACAT(Cir,cus) |
| 114 | EOCP |
| 115 | $cppstdin $cppflags $cppminus <cpp_stuff.c >cpp_stuff.out 2>&1 |
| 116 | if $contains 'Circus' cpp_stuff.out >/dev/null 2>&1; then |
| 117 | echo "Oh! Smells like ANSI's been here." >&4 |
| 118 | echo "We can catify or stringify, separately or together!" |
| 119 | cpp_stuff=42 |
| 120 | elif $contains 'Reiser' cpp_stuff.out >/dev/null 2>&1; then |
| 121 | echo "Ah, yes! The good old days!" >&4 |
| 122 | echo "However, in the good old days we don't know how to stringify and" |
| 123 | echo "catify at the same time." |
| 124 | cpp_stuff=1 |
| 125 | else |
| 126 | $cat >&4 <<EOM |
| 127 | Hmm, I don't seem to be able to concatenate tokens with your cpp. |
| 128 | You're going to have to edit the values of CAT[2-5] in config.h... |
| 129 | EOM |
| 130 | ?X: It would be nice to have configure remind us at the end that some manual |
| 131 | ?X: intervention is needed -- FIXME |
| 132 | cpp_stuff="/* Help! How do we handle cpp_stuff? */*/" |
| 133 | fi |
| 134 | $rm -f cpp_stuff.* |
| 135 | |