1#!/bin/sh
2#
3# MKlib_gen.sh -- generate sources from curses.h macro definitions
4#
5# ($Id: MKlib_gen.sh,v 1.11 1998/01/17 14:16:52 Juan.Jose.Garcia.Ripoll Exp $)
6#
7# The XSI Curses standard requires all curses entry points to exist as
8# functions, even though many definitions would normally be shadowed
9# by macros. Rather than hand-hack all that code, we actually
10# generate functions from the macros.
11#
12# This script accepts a file of prototypes on standard input. It discards
13# any that don't have a `generated' comment attached. It then parses each
14# prototype (relying on the fact that none of the macros take function
15# pointer or array arguments) and generates C source from it.
16#
17# Here is what the pipeline stages are doing:
18#
19# 1. sed: extract prototypes of generated functions
20# 2. sed: decorate prototypes with generated arguments a1. a2,...z
21# 3. awk: generate the calls with args matching the formals
22# 4. sed: prefix function names in prototypes so the preprocessor won't expand
23# them.
24# 5. cpp: macro-expand the file so the macro calls turn into C calls
25# 6. awk: strip the expansion junk off the front and add the new header
26# 7. sed: squeeze spaces, strip off gen_ prefix, create needed #undef
27#
28
29preprocessor="$1 -I../include"
30AWK="$2"
31ED1=sed1$$.sed
32ED2=sed2$$.sed
33ED3=sed3$$.sed
34AW1=awk1$$.awk
35TMP=gen$$.c
36trap "rm -f $ED1 $ED2 $ED3 $AW1 $TMP" 0 1 2 5 15
37
38(cat <<EOF
39#include <ncurses_cfg.h>
40#include <curses.h>
41
42DECLARATIONS
43
44EOF
45cat >$ED1 <<EOF1
46/^extern.*generated/{
47 h
48 s/^.*generated:\([^ *]*\).*/P_#if_USE_\1_SUPPORT/p
49 g
50 s/^extern \([^;]*\);.*/\1/p
51 g
52 s/^.*generated:\([^ *]*\).*/P_#endif/p
53}
54EOF1
55
56cat >$ED2 <<EOF2
57/^P_/b nc
58/(void)/b nc
59 s/,/ a1% /
60 s/,/ a2% /
61 s/,/ a3% /
62 s/,/ a4% /

--- 6 unchanged lines hidden (view full) ---

69 s/,/ a11% /
70 s/,/ a12% /
71 s/,/ a13% /
72 s/,/ a14% /
73 s/,/ a15% /
74 s/*/ * /g
75 s/%/ , /g
76 s/)/ z)/
77:nc
78 /(/s// ( /
79 s/)/ )/
80EOF2
81
82cat >$ED3 <<EOF3
83/^P_/{
84 s/^P_#if_/#if /
85 s/^P_//
86 b done
87}
88 s/ */ /g
89 s/ */ /g
90 s/ ,/,/g
91 s/ )/)/g
92 s/ gen_/ /
93 s/^M_/#undef /
94 /^%%/s// /
95:done
96EOF3
97
98cat >$AW1 <<\EOF1
99BEGIN {
100 skip=0;
101 }
102 /^P_#if/ {
103 print "\n"
104 print $0
105 skip=0;
106 }
107 /^P_#endif/ {
108 print $0
109 skip=1;
110 }
111 $0 !~ /^P_/ {
112 if (skip)
113 print "\n"
114 skip=1;
115
116 print "M_" $2
117 print $0;
118 print "{";
119 argcount = 1;
120 if (NF == 5 && $4 == "void")
121 argcount = 0;
122 if (argcount != 0) {
123 for (i = 1; i <= NF; i++)
124 if ($i == ",")
125 argcount++;
126 }
127
128 # suppress trace-code for functions that we cannot do properly here,
129 # since they return data.
130 dotrace = 1;
131 if ($2 == "innstr")
132 dotrace = 0;
133
134 call = "%%T((T_CALLED(\""
135 args = ""
136 comma = ""
137 num = 0;
138 pointer = 0;
139 argtype = ""
140 for (i = 1; i <= NF; i++) {
141 ch = $i;
142 if ( ch == "*" )
143 pointer = 1;
144 else if ( ch == "va_list" )
145 pointer = 1;
146 else if ( ch == "char" )
147 argtype = "char";
148 else if ( ch == "int" )
149 argtype = "int";
150 else if ( ch == "short" )
151 argtype = "short";
152 else if ( ch == "chtype" )
153 argtype = "chtype";
154 else if ( ch == "attr_t" || ch == "NCURSES_ATTR_T" )
155 argtype = "attr";
156
157 if ( ch == "," || ch == ")" ) {
158 if (pointer) {
159 if ( argtype == "char" ) {
160 call = call "%s"
161 comma = comma "_nc_visbuf2(" num ","
162 pointer = 0;
163 } else
164 call = call "%p"
165 } else if (argcount != 0) {
166 if ( argtype == "int" || argtype == "short" ) {
167 call = call "%d"
168 argtype = ""
169 } else if ( argtype != "" ) {
170 call = call "%s"
171 comma = comma "_trace" argtype "2(" num ","
172 } else {
173 call = call "%#lx"
174 comma = comma "(long)"
175 }
176 }
177 if (ch == ",")
178 args = args comma "a" ++num;
179 else if (argcount != 0)
180 args = args comma "z"
181 call = call ch
182 if (pointer == 0 && argcount != 0 && argtype != "" )
183 args = args ")"
184 if (args != "")
185 comma = ", "
186 pointer = 0;
187 argtype = ""
188 }
189 if ( i == 2 || ch == "(" )
190 call = call ch
191 }
192 call = call "\")"
193 if (args != "")
194 call = call ", " args
195 call = call ")); "
196
197 if (dotrace)
198 printf "%s", call
199
200 if (match($0, "^void"))
201 call = ""
202 else if (dotrace)
203 call = "returnCode( ";
204 else
205 call = "%%return ";
206
207 call = call $2 "(";
208 for (i = 1; i < argcount; i++)
209 call = call "a" i ", ";
210 if (argcount != 0)
211 call = call "z";
212 if (!match($0, "^void"))
213 call = call ") ";
214 if (dotrace)
215 call = call ")";
216 print call ";"
217
218 if (match($0, "^void"))
219 print "%%returnVoid;"
220 print "}";
221}
222EOF1
223
224sed -n -f $ED1 | sed -f $ED2 \
225| $AWK -f $AW1 ) \
226| sed \
227 -e '/^\([a-z_][a-z_]*\) /s//\1 gen_/' >$TMP
228 $preprocessor $TMP 2>/dev/null \
229| $AWK '
230BEGIN {
231 print "/*"
232 print " * DO NOT EDIT THIS FILE BY HAND!"
233 print " * It is generated by MKlib_gen.sh."
234 print " *"
235 print " * This is a file of trivial functions generated from macro"
236 print " * definitions in curses.h to satisfy the XSI Curses requirement"
237 print " * that every macro also exist as a callable function."
238 print " *"
239 print " * It will never be linked unless you call one of the entry"
240 print " * points with its normal macro definition disabled. In that"
241 print " * case, if you have no shared libraries, it will indirectly"
242 print " * pull most of the rest of the library into your link image."
243 print " */"
244 print "#include <curses.priv.h>"
245 print ""
246 }
247/^DECLARATIONS/ {start = 1; next;}
248 {if (start) print $0;}
249' \
250| sed -f $ED3 \
251| sed \
252 -e 's/^.*T_CALLED.*returnCode( \([a-z].*) \));/ return \1;/' \
253 -e 's/^.*T_CALLED.*returnCode( \((wmove.*) \));/ return \1;/'
254