1#!/bin/sh 2# 3# MKlib_gen.sh -- generate sources from curses.h macro definitions 4# 5# ($Id: MKlib_gen.sh,v 1.34 2008/08/30 19:20:50 tom Exp $) 6# 7############################################################################## 8# Copyright (c) 1998-2007,2008 Free Software Foundation, Inc. # 9# # 10# Permission is hereby granted, free of charge, to any person obtaining a # 11# copy of this software and associated documentation files (the "Software"), # 12# to deal in the Software without restriction, including without limitation # 13# the rights to use, copy, modify, merge, publish, distribute, distribute # 14# with modifications, sublicense, and/or sell copies of the Software, and to # 15# permit persons to whom the Software is furnished to do so, subject to the # 16# following conditions: # 17# # 18# The above copyright notice and this permission notice shall be included in # 19# all copies or substantial portions of the Software. # 20# # 21# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR # 22# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, # 23# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL # 24# THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER # 25# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING # 26# FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER # 27# DEALINGS IN THE SOFTWARE. # 28# # 29# Except as contained in this notice, the name(s) of the above copyright # 30# holders shall not be used in advertising or otherwise to promote the sale, # 31# use or other dealings in this Software without prior written # 32# authorization. # 33############################################################################## 34# 35# The XSI Curses standard requires all curses entry points to exist as 36# functions, even though many definitions would normally be shadowed 37# by macros. Rather than hand-hack all that code, we actually 38# generate functions from the macros. 39# 40# This script accepts a file of prototypes on standard input. It discards 41# any that don't have a `generated' comment attached. It then parses each 42# prototype (relying on the fact that none of the macros take function 43# pointer or array arguments) and generates C source from it. 44# 45# Here is what the pipeline stages are doing: 46# 47# 1. sed: extract prototypes of generated functions 48# 2. sed: decorate prototypes with generated arguments a1. a2,...z 49# 3. awk: generate the calls with args matching the formals 50# 4. sed: prefix function names in prototypes so the preprocessor won't expand 51# them. 52# 5. cpp: macro-expand the file so the macro calls turn into C calls 53# 6. awk: strip the expansion junk off the front and add the new header 54# 7. sed: squeeze spaces, strip off gen_ prefix, create needed #undef 55# 56 57# keep the editing independent of locale: 58if test "${LANGUAGE+set}" = set; then LANGUAGE=C; export LANGUAGE; fi 59if test "${LANG+set}" = set; then LANG=C; export LANG; fi 60if test "${LC_ALL+set}" = set; then LC_ALL=C; export LC_ALL; fi 61if test "${LC_MESSAGES+set}" = set; then LC_MESSAGES=C; export LC_MESSAGES; fi 62if test "${LC_CTYPE+set}" = set; then LC_CTYPE=C; export LC_CTYPE; fi 63if test "${LC_COLLATE+set}" = set; then LC_COLLATE=C; export LC_COLLATE; fi 64 65preprocessor="$1 -DNCURSES_INTERNALS -I../include" 66AWK="$2" 67USE="$3" 68 69PID=$$ 70ED1=sed1_${PID}.sed 71ED2=sed2_${PID}.sed 72ED3=sed3_${PID}.sed 73ED4=sed4_${PID}.sed 74AW1=awk1_${PID}.awk 75AW2=awk2_${PID}.awk 76TMP=gen__${PID}.c 77trap "rm -f $ED1 $ED2 $ED3 $ED4 $AW1 $AW2 $TMP" 0 1 2 5 15 78 79ALL=$USE 80if test "$USE" = implemented ; then 81 CALL="call_" 82 cat >$ED1 <<EOF1 83/^extern.*implemented/{ 84 h 85 s/^.*implemented:\([^ *]*\).*/P_POUNDCif_USE_\1_SUPPORT/p 86 g 87 s/^extern \([^;]*\);.*/\1/p 88 g 89 s/^.*implemented:\([^ *]*\).*/P_POUNDCendif/p 90} 91/^extern.*generated/{ 92 h 93 s/^.*generated:\([^ *]*\).*/P_POUNDCif_USE_\1_SUPPORT/p 94 g 95 s/^extern \([^;]*\);.*/\1/p 96 g 97 s/^.*generated:\([^ *]*\).*/P_POUNDCendif/p 98} 99EOF1 100else 101 CALL="" 102 cat >$ED1 <<EOF1 103/^extern.*${ALL}/{ 104 h 105 s/^.*${ALL}:\([^ *]*\).*/P_POUNDCif_USE_\1_SUPPORT/p 106 g 107 s/^extern \([^;]*\);.*/\1/p 108 g 109 s/^.*${ALL}:\([^ *]*\).*/P_POUNDCendif/p 110} 111EOF1 112fi 113 114cat >$ED2 <<EOF2 115/^P_/b nc 116/(void)/b nc 117 s/,/ a1% / 118 s/,/ a2% / 119 s/,/ a3% / 120 s/,/ a4% / 121 s/,/ a5% / 122 s/,/ a6% / 123 s/,/ a7% / 124 s/,/ a8% / 125 s/,/ a9% / 126 s/,/ a10% / 127 s/,/ a11% / 128 s/,/ a12% / 129 s/,/ a13% / 130 s/,/ a14% / 131 s/,/ a15% / 132 s/*/ * /g 133 s/%/ , /g 134 s/)/ z)/ 135 s/\.\.\. z)/...)/ 136:nc 137 s/(/ ( / 138 s/)/ )/ 139EOF2 140 141cat >$ED3 <<EOF3 142/^P_/{ 143 s/^P_POUNDCif_/#if / 144 s/^P_POUNDCendif/#endif/ 145 s/^P_// 146 b done 147} 148 s/ */ /g 149 s/ */ /g 150 s/ ,/,/g 151 s/( /(/g 152 s/ )/)/g 153 s/ gen_/ / 154 s/^M_/#undef / 155 s/^[ ]*@[ ]*@[ ]*/ / 156:done 157EOF3 158 159if test "$USE" = generated ; then 160cat >$ED4 <<EOF 161 s/^\(.*\) \(.*\) (\(.*\))\$/NCURSES_EXPORT(\1) \2 (\3)/ 162EOF 163else 164cat >$ED4 <<EOF 165/^\(.*\) \(.*\) (\(.*\))\$/ { 166 h 167 s/^\(.*\) \(.*\) (\(.*\))\$/extern \1 call_\2 (\3);/ 168 p 169 g 170 s/^\(.*\) \(.*\) (\(.*\))\$/\1 call_\2 (\3)/ 171 } 172EOF 173fi 174 175cat >$AW1 <<\EOF1 176BEGIN { 177 skip=0; 178 } 179/^P_POUNDCif/ { 180 print "\n" 181 print $0 182 skip=0; 183} 184/^P_POUNDCendif/ { 185 print $0 186 skip=1; 187} 188$0 !~ /^P_/ { 189 if (skip) 190 print "\n" 191 skip=1; 192 193 first=$1 194 for (i = 1; i <= NF; i++) { 195 if ( $i != "NCURSES_CONST" ) { 196 first = i; 197 break; 198 } 199 } 200 second = first + 1; 201 if ( $first == "chtype" ) { 202 returnType = "Char"; 203 } else if ( $first == "SCREEN" ) { 204 returnType = "SP"; 205 } else if ( $first == "WINDOW" ) { 206 returnType = "Win"; 207 } else if ( $first == "attr_t" || $second == "attrset" || $second == "standout" || $second == "standend" || $second == "wattrset" || $second == "wstandout" || $second == "wstandend" ) { 208 returnType = "Attr"; 209 } else if ( $first == "bool" || $first == "NCURSES_BOOL" ) { 210 returnType = "Bool"; 211 } else if ( $second == "*" ) { 212 returnType = "Ptr"; 213 } else { 214 returnType = "Code"; 215 } 216 myfunc = second; 217 for (i = second; i <= NF; i++) { 218 if ($i != "*") { 219 myfunc = i; 220 break; 221 } 222 } 223 if (using == "generated") { 224 print "M_" $myfunc 225 } 226 print $0; 227 print "{"; 228 argcount = 1; 229 check = NF - 1; 230 if ($check == "void") 231 argcount = 0; 232 if (argcount != 0) { 233 for (i = 1; i <= NF; i++) 234 if ($i == ",") 235 argcount++; 236 } 237 238 # suppress trace-code for functions that we cannot do properly here, 239 # since they return data. 240 dotrace = 1; 241 if ($myfunc ~ /innstr/) 242 dotrace = 0; 243 if ($myfunc ~ /innwstr/) 244 dotrace = 0; 245 246 # workaround functions that we do not parse properly 247 if ($myfunc ~ /ripoffline/) { 248 dotrace = 0; 249 argcount = 2; 250 } 251 if ($myfunc ~ /wunctrl/) { 252 dotrace = 0; 253 } 254 255 call = "@@T((T_CALLED(\"" 256 args = "" 257 comma = "" 258 num = 0; 259 pointer = 0; 260 va_list = 0; 261 varargs = 0; 262 argtype = "" 263 for (i = myfunc; i <= NF; i++) { 264 ch = $i; 265 if ( ch == "*" ) 266 pointer = 1; 267 else if ( ch == "va_list" ) 268 va_list = 1; 269 else if ( ch == "..." ) 270 varargs = 1; 271 else if ( ch == "char" ) 272 argtype = "char"; 273 else if ( ch == "int" ) 274 argtype = "int"; 275 else if ( ch == "short" ) 276 argtype = "short"; 277 else if ( ch == "chtype" ) 278 argtype = "chtype"; 279 else if ( ch == "attr_t" || ch == "NCURSES_ATTR_T" ) 280 argtype = "attr"; 281 282 if ( ch == "," || ch == ")" ) { 283 if (va_list) { 284 call = call "%s" 285 } else if (varargs) { 286 call = call "%s" 287 } else if (pointer) { 288 if ( argtype == "char" ) { 289 call = call "%s" 290 comma = comma "_nc_visbuf2(" num "," 291 pointer = 0; 292 } else 293 call = call "%p" 294 } else if (argcount != 0) { 295 if ( argtype == "int" || argtype == "short" ) { 296 call = call "%d" 297 argtype = "" 298 } else if ( argtype != "" ) { 299 call = call "%s" 300 comma = comma "_trace" argtype "2(" num "," 301 } else { 302 call = call "%#lx" 303 comma = comma "(long)" 304 } 305 } 306 if (ch == ",") { 307 args = args comma "a" ++num; 308 } else if ( argcount != 0 ) { 309 if ( va_list ) { 310 args = args comma "\"va_list\"" 311 } else if ( varargs ) { 312 args = args comma "\"...\"" 313 } else { 314 args = args comma "z" 315 } 316 } 317 call = call ch 318 if (pointer == 0 && argcount != 0 && argtype != "" ) 319 args = args ")" 320 if (args != "") 321 comma = ", " 322 pointer = 0; 323 argtype = "" 324 } 325 if ( i == 2 || ch == "(" ) 326 call = call ch 327 } 328 call = call "\")" 329 if (args != "") 330 call = call ", " args 331 call = call ")); " 332 333 if (dotrace) 334 printf "%s", call 335 336 if (match($0, "^void")) 337 call = "" 338 else if (dotrace) 339 call = sprintf("return%s( ", returnType); 340 else 341 call = "@@return "; 342 343 call = call $myfunc "("; 344 for (i = 1; i < argcount; i++) { 345 if (i != 1) 346 call = call ", "; 347 call = call "a" i; 348 } 349 if ( argcount != 0 && $check != "..." ) { 350 if (argcount != 1) 351 call = call ", "; 352 call = call "z"; 353 } 354 if (!match($0, "^void")) 355 call = call ") "; 356 if (dotrace) 357 call = call ")"; 358 print call ";" 359 360 if (match($0, "^void")) 361 print "@@returnVoid;" 362 print "}"; 363} 364EOF1 365 366cat >$AW2 <<EOF1 367BEGIN { 368 print "/*" 369 print " * DO NOT EDIT THIS FILE BY HAND!" 370 printf " * It is generated by $0 %s.\n", "$USE" 371 if ( "$USE" == "generated" ) { 372 print " *" 373 print " * This is a file of trivial functions generated from macro" 374 print " * definitions in curses.h to satisfy the XSI Curses requirement" 375 print " * that every macro also exist as a callable function." 376 print " *" 377 print " * It will never be linked unless you call one of the entry" 378 print " * points with its normal macro definition disabled. In that" 379 print " * case, if you have no shared libraries, it will indirectly" 380 print " * pull most of the rest of the library into your link image." 381 } 382 print " */" 383 print "#define NCURSES_ATTR_T int" 384 print "#include <curses.priv.h>" 385 print "" 386 } 387/^DECLARATIONS/ {start = 1; next;} 388 {if (start) print \$0;} 389END { 390 if ( "$USE" != "generated" ) { 391 print "int main(void) { return 0; }" 392 } 393 } 394EOF1 395 396cat >$TMP <<EOF 397#include <ncurses_cfg.h> 398#undef NCURSES_NOMACROS 399#include <curses.h> 400 401DECLARATIONS 402 403EOF 404 405sed -n -f $ED1 \ 406| sed -e 's/NCURSES_EXPORT(\(.*\)) \(.*\) (\(.*\))/\1 \2(\3)/' \ 407| sed -f $ED2 \ 408| $AWK -f $AW1 using=$USE \ 409| sed \ 410 -e 's/ [ ]*$//g' \ 411 -e 's/^\([a-zA-Z_][a-zA-Z_]*[ *]*\)/\1 gen_/' \ 412 -e 's/gen_$//' \ 413 -e 's/ / /g' >>$TMP 414 415$preprocessor $TMP 2>/dev/null \ 416| sed \ 417 -e 's/ / /g' \ 418 -e 's/^ //' \ 419 -e 's/_Bool/NCURSES_BOOL/g' \ 420| $AWK -f $AW2 \ 421| sed -f $ED3 \ 422| sed \ 423 -e 's/^.*T_CALLED.*returnCode( \([a-z].*) \));/ return \1;/' \ 424 -e 's/^.*T_CALLED.*returnCode( \((wmove.*) \));/ return \1;/' \ 425 -e 's/gen_//' \ 426 -e 's/^[ ]*#/#/' \ 427 -e '/#ident/d' \ 428 -e '/#line/d' \ 429| sed -f $ED4 430