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1 | ?RCS: $Id: cpp_stuff.U 1 2006-08-24 12:32:52Z rmanfredi $ |
2 | ?RCS: | |
3 | ?RCS: Copyright (c) 1991-1997, 2004-2006, 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 4.0. | |
10 | ?RCS: | |
11 | ?RCS: $Log: cpp_stuff.U,v $ | |
12 | ?RCS: Revision 3.0.1.2 1997/02/28 15:30:48 ram | |
13 | ?RCS: patch61: added cute quoting trick for wild stringify support | |
14 | ?RCS: | |
15 | ?RCS: Revision 3.0.1.1 1994/10/29 16:08:24 ram | |
16 | ?RCS: patch36: now uses cppstdin instead of plain cpp for consistency (ADO) | |
17 | ?RCS: patch36: remove temporary files when done | |
18 | ?RCS: | |
19 | ?RCS: Revision 3.0 1993/08/18 12:05:36 ram | |
20 | ?RCS: Baseline for dist 3.0 netwide release. | |
21 | ?RCS: | |
22 | ?MAKE:cpp_stuff cpp_quote: cat contains cppstdin cppflags cppminus rm Warn \ | |
23 | package | |
24 | ?MAKE: -pick add $@ %< | |
25 | ?S:cpp_stuff: | |
26 | ?S: This variable contains an identification of the catenation mechanism | |
27 | ?S: used by the C preprocessor. | |
28 | ?S:. | |
29 | ?S:cpp_quote: | |
30 | ?S: This variable is set to either '"' or '' depending on whether the | |
31 | ?S: pre-processor pre-dates ANSI or not. It is used in the production of | |
32 | ?S: the SQuoTe() and EQuoTe() macros, and was introduced to overcome a bug | |
33 | ?S: in gcc 3.x whereby the pre-processor complained loudly about the | |
34 | ?S: unterminated strings. | |
35 | ?S:. | |
36 | ?C:CAT2: | |
37 | ?C: This macro catenates 2 tokens together. | |
38 | ?C:. | |
39 | ?C:CAT3: | |
40 | ?C: This macro catenates 3 tokens together. | |
41 | ?C:. | |
42 | ?C:CAT4: | |
43 | ?C: This macro catenates 4 tokens together. | |
44 | ?C:. | |
45 | ?C:CAT5: | |
46 | ?C: This macro catenates 5 tokens together. | |
47 | ?C:. | |
48 | ?C:STRINGIFY: | |
49 | ?C: This macro surrounds its token with double quotes. | |
50 | ?C:. | |
51 | ?C:SCAT2: | |
52 | ?C: This macro catenates 2 tokens together and stringifies the result. | |
53 | ?C:. | |
54 | ?C:SCAT3: | |
55 | ?C: This macro catenates 3 tokens together and stringifies the result. | |
56 | ?C:. | |
57 | ?C:SCAT4: | |
58 | ?C: This macro catenates 4 tokens together and stringifies the result. | |
59 | ?C:. | |
60 | ?C:SCAT5: | |
61 | ?C: This macro catenates 5 tokens together and stringifies the result. | |
62 | ?C:. | |
63 | ?H:?%<:#if $cpp_stuff == 1 | |
64 | ?H:?CAT2:#define CAT2(a,b)a/**/b | |
65 | ?H:?CAT3:#define CAT3(a,b,c)a/**/b/**/c | |
66 | ?H:?CAT4:#define CAT4(a,b,c,d)a/**/b/**/c/**/d | |
67 | ?H:?CAT5:#define CAT5(a,b,c,d,e)a/**/b/**/c/**/d/**/e | |
68 | ?H:?STRINGIFY:#define STRINGIFY(a)"a" | |
69 | ?H:?%<:#define SQuoTe(a)${cpp_quote}a | |
70 | ?H:?%<:#define EQuoTe(a)a${cpp_quote} | |
71 | ?H:?SCAT2:#define SCAT2(a,b)EQuoTe(SQuoTe(a)b) | |
72 | ?H:?SCAT3:#define SCAT3(a,b,c)EQuoTe(SQuoTe(a)b/**/c) | |
73 | ?H:?SCAT4:#define SCAT4(a,b,c,d)EQuoTe(SQuoTe(a)b/**/c/**/d) | |
74 | ?H:?SCAT5:#define SCAT5(a,b,c,d,e)EQuoTe(SQuoTe(a)b/**/c/**/d/**/e) | |
75 | ?H:?%<:#endif | |
76 | ?H:?%<:#if $cpp_stuff == 42 | |
77 | ?X: The additional level of indirection enables these macros to be | |
78 | ?X: used as arguments to other macros. See K&R 2nd ed., page 231. | |
79 | ?H:?%<:#define CaTiFy(a,b) a ## b | |
80 | ?H:?%<:#define CAT2(a,b) CaTiFy(a,b) | |
81 | ?H:?CAT3:#define CAT3(a,b,c) CAT2(CaTiFy(a,b),c) | |
82 | ?H:?CAT4:#define CAT4(a,b,c,d) CAT2(CaTiFy(a,b), CaTiFy(c,d)) | |
83 | ?H:?CAT5:#define CAT5(a,b,c,d,e) CAT2(CAT2(CaTiFy(a,b), CaTiFy(c,d)), e) | |
84 | ?H:?%<:#define StGiFy(a)# a | |
85 | ?H:?STRINGIFY:#define STRINGIFY(a)StGiFy(a) | |
86 | ?H:?SCAT2:#define SCAT2(a,b)StGiFy(a) StGiFy(b) | |
87 | ?H:?SCAT3:#define SCAT3(a,b,c)StGiFy(a) StGiFy(b) StGiFy(c) | |
88 | ?H:?SCAT4:#define SCAT4(a,b,c,d)StGiFy(a) StGiFy(b) StGiFy(c) StGiFy(d) | |
89 | ?H:?SCAT5:#define SCAT5(a,b,c,d,e)StGiFy(a) StGiFy(b) StGiFy(c) StGiFy(d) StGiFy(e) | |
90 | ?H:?%<:#endif | |
91 | ?H:?%<:#if $cpp_stuff != 1 && $cpp_stuff != 42 | |
92 | ?H:?%<:#include "Bletch: How does this C preprocessor catenate tokens?" | |
93 | ?H:?%<:#endif | |
94 | ?H:. | |
95 | ?W:%<:CAT2 CAT3 CAT4 CAT5 STRINGIFY SCAT2 SCAT3 SCAT4 SCAT5 | |
96 | ?F:!cpp_stuff.c | |
97 | ?LINT:known StGiFy EQuoTe SQuoTe CaTiFy | |
98 | : how do we catenate cpp tokens here? | |
99 | echo " " | |
100 | echo "Checking to see how your cpp does stuff like catenate tokens..." >&4 | |
101 | cpp_quote='' | |
102 | $cat >cpp_stuff.c <<'EOCP' | |
103 | #define RCAT(a,b)a/**/b | |
104 | #define ACAT(a,b)a ## b | |
105 | RCAT(Rei,ser) | |
106 | ACAT(Cir,cus) | |
107 | EOCP | |
108 | $cppstdin $cppflags $cppminus <cpp_stuff.c >cpp_stuff.out 2>&1 | |
109 | if $contains 'Circus' cpp_stuff.out >/dev/null 2>&1; then | |
110 | echo "Oh! Smells like ANSI's been here." | |
111 | echo "We can catify or stringify, separately or together!" | |
112 | cpp_stuff=42 | |
113 | elif $contains 'Reiser' cpp_stuff.out >/dev/null 2>&1; then | |
114 | echo "Ah, yes! The good old days!" | |
115 | cpp_stuff=1 | |
116 | $cat >cpp_stuff.c <<'EOCP' | |
117 | #define SQuoTe(a)"a | |
118 | #define EQuoTe(a)a" | |
119 | #define CAT2(a,b)EQuoTe(SQuoTe(a)b) | |
120 | CAT2(Vic,tory) | |
121 | EOCP | |
122 | $cppstdin $cppflags $cppminus <cpp_stuff.c >cpp_stuff.out 2>&1 | |
123 | if $contains '"Victory"' cpp_stuff.out >/dev/null 2>&1; then | |
124 | echo "I'll resort to a cute trick to also be able to stringify." | |
125 | cpp_quote='"' | |
126 | else | |
127 | $cat <<EOM | |
128 | However, in the good old days we don't know how to stringify and | |
129 | catify at the same time... | |
130 | @if SCAT2 || SCAT3 || SCAT4 || SCAT5 | |
131 | You might have to edit the values of the SCAT[2-5] macros in config.h... | |
132 | @else | |
133 | Hopefully, $package does not need this feature. | |
134 | @end | |
135 | EOM | |
136 | fi | |
137 | else | |
138 | ./warn <<EOM | |
139 | I can't seem to be able to catenate tokens with your cpp. | |
140 | @if CAT2 || CAT3 || CAT4 || CAT5 || SCAT2 || SCAT3 || SCAT4 || SCAT5 | |
141 | You're going to have to edit the values of the following | |
142 | macros in config.h: | |
143 | ||
144 | @if CAT2 || CAT3 || CAT4 || CAT5 | |
145 | CAT[2-5] | |
146 | @end | |
147 | @if SCAT2 || SCAT3 || SCAT4 || SCAT5 | |
148 | SCAT[2-5] | |
149 | @end | |
150 | ||
151 | in order to let me compile. | |
152 | @end | |
153 | EOM | |
154 | cpp_stuff="/* Help! How do we handle cpp_stuff? */*/" | |
155 | fi | |
156 | $rm -f cpp_stuff.* | |
157 |