1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
|
#!/bin/sh
#
# MKlib_gen.sh -- generate sources from curses.h macro definitions
#
# ($Id: MKlib_gen.sh,v 1.1 1996/12/16 08:43:21 tholo Exp $)
#
# The XSI Curses standard requires all curses entry points to exist as
# functions, even though many definitions would normally be shadowed
# by macros. Rather than hand-hack all that code, we actually
# generate functions from the macros.
#
# This script accepts a file of prototypes on standard input. It discards
# any that don't have a `generated' comment attached. It then parses each
# prototype (relying on the fact that none of the macros take function
# pointer or array arguments) and generates C source from it.
#
# Here is what the pipeline stages are doing:
#
# 1. sed: extract prototypes of generated functions
# 2. sed: decorate prototypes with generated arguments a1. a2,...z
# 3. awk: generate the calls with args matching the formals
# 4. sed: prefix function names in prototypes so the preprocessor won't expand
# them.
# 5. cpp: macroexpand the file so the macro calls turn into C calls
# 6. awk: strip the expansion junk off the front and add the new header
# 7. sed: squeeze spaces, strip off gen_ prefix, create needed #undef
#
preprocessor="$1 -I../include"
AWK="$2"
TMP=gen$$.c
trap "rm -f $TMP" 0 1 2 5 15
(cat <<EOF
#include "curses.h"
DECLARATIONS
EOF
sed -n -e "/^extern.*generated/s/^extern \([^;]*\);.*/\1/p" \
| sed \
-e "/(/s// (/" \
-e "/(void)/b nc" \
-e "s/,/ a1% /" \
-e "s/,/ a2% /" \
-e "s/,/ a3% /" \
-e "s/,/ a4% /" \
-e "s/,/ a5% /" \
-e "s/,/ a6% /" \
-e "s/,/ a7% /" \
-e "s/,/ a8% /" \
-e "s/,/ a9% /" \
-e "s/,/ a10% /" \
-e "s/,/ a11% /" \
-e "s/,/ a12% /" \
-e "s/,/ a13% /" \
-e "s/,/ a14% /" \
-e "s/,/ a15% /" \
-e "s/%/,/g" \
-e "s/)/ z)/" \
-e ":nc" \
| $AWK '{
print "\n"
print "M_" $2
print $0;
print "{";
for (i = argcount = 0; i < length($0); i++)
if (substr($0, i, 1) == ",")
argcount++;
++argcount;
if (match($0, "^void"))
call = "%%"
else
call = "%%return ";
call = call $2 "(";
for (i = 1; i < argcount; i++)
call = call " a" i ", ";
if (match($0, "\\(void\\)"))
call = call ");";
else
call = call "z);";
print call
print "}";
}
' ) \
| sed \
-e '/^\([a-z_][a-z_]*\) /s//\1 gen_/' >$TMP
$preprocessor $TMP 2>/dev/null \
| $AWK '
BEGIN {
print "/*"
print " * DO NOT EDIT THIS FILE BY HAND!"
print " * It is generated by MKlib_gen.sh."
print " *"
print " * This is a file of trivial functions generated from macro"
print " * definitions in curses.h in order to satisfy the XSI Curses"
print " * requirement that every macro also exist as a callable"
print " * function."
print " *"
print " * It will neever be linked unless you call one of the entry"
print " * points with its normal macro definition disabled. In that"
print " * case, if you have no shared libraries, it will indirectly"
print " * pull most of the rest of the library into your link image."
print " * Cope with it."
print " */"
print "#include \"curses.h\""
print ""
}
/^DECLARATIONS/ {start = 1; next;}
{if (start) print $0;}
' \
| sed \
-e 's/ */ /g' \
-e 's/ */ /g' \
-e 's/ gen_/ /' \
-e 's/^M_/#undef /' \
-e '/^%%/s// /'
|
