contrib/ncurses/ncurses/base/MKlib_gen.sh

   1 #!/bin/sh
   2 #
   3 # MKlib_gen.sh -- generate sources from curses.h macro definitions
   4 #
   5 # ($Id: MKlib_gen.sh,v 1.63 2020/02/02 23:34:34 tom Exp $)
   6 #
   7 ##############################################################################
   8 # Copyright 2018,2020 Thomas E. Dickey                                       #
   9 # Copyright 1998-2016,2017 Free Software Foundation, Inc.                    #
  10 #                                                                            #
  11 # Permission is hereby granted, free of charge, to any person obtaining a    #
  12 # copy of this software and associated documentation files (the "Software"), #
  13 # to deal in the Software without restriction, including without limitation  #
  14 # the rights to use, copy, modify, merge, publish, distribute, distribute    #
  15 # with modifications, sublicense, and/or sell copies of the Software, and to #
  16 # permit persons to whom the Software is furnished to do so, subject to the  #
  17 # following conditions:                                                      #
  18 #                                                                            #
  19 # The above copyright notice and this permission notice shall be included in #
  20 # all copies or substantial portions of the Software.                        #
  21 #                                                                            #
  22 # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR #
  23 # IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,   #
  24 # FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL    #
  25 # THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER      #
  26 # LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING    #
  27 # FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER        #
  28 # DEALINGS IN THE SOFTWARE.                                                  #
  29 #                                                                            #
  30 # Except as contained in this notice, the name(s) of the above copyright     #
  31 # holders shall not be used in advertising or otherwise to promote the sale, #
  32 # use or other dealings in this Software without prior written               #
  33 # authorization.                                                             #
  34 ##############################################################################
  35 #
  36 # The XSI Curses standard requires all curses entry points to exist as
  37 # functions, even though many definitions would normally be shadowed
  38 # by macros.  Rather than hand-hack all that code, we actually
  39 # generate functions from the macros.
  40 #
  41 # This script accepts a file of prototypes on standard input.  It discards
  42 # any that don't have a `generated' comment attached. It then parses each
  43 # prototype (relying on the fact that none of the macros take function
  44 # pointer or array arguments) and generates C source from it.
  45 #
  46 # Here is what the pipeline stages are doing:
  47 #
  48 # 1. sed: extract prototypes of generated functions
  49 # 2. sed: decorate prototypes with generated arguments a1. a2,...z
  50 # 3. awk: generate the calls with args matching the formals
  51 # 4. sed: prefix function names in prototypes so the preprocessor won't expand
  52 #         them.
  53 # 5. cpp: macro-expand the file so the macro calls turn into C calls
  54 # 6. awk: strip the expansion junk off the front and add the new header
  55 # 7. sed: squeeze spaces, strip off gen_ prefix.
  56 #
  57
  58 # keep the editing independent of locale:
  59 if test "${LANGUAGE+set}"    = set; then LANGUAGE=C;    export LANGUAGE;    fi
  60 if test "${LANG+set}"        = set; then LANG=C;        export LANG;        fi
  61 if test "${LC_ALL+set}"      = set; then LC_ALL=C;      export LC_ALL;      fi
  62 if test "${LC_MESSAGES+set}" = set; then LC_MESSAGES=C; export LC_MESSAGES; fi
  63 if test "${LC_CTYPE+set}"    = set; then LC_CTYPE=C;    export LC_CTYPE;    fi
  64 if test "${LC_COLLATE+set}"  = set; then LC_COLLATE=C;  export LC_COLLATE;  fi
  65
  66 preprocessor="$1 -DNCURSES_WATTR_MACROS -DNCURSES_INTERNALS -I../include"
  67 AWK="$2"
  68 USE="$3"
  69
  70 # A patch discussed here:
  71 #       https://gcc.gnu.org/ml/gcc-patches/2014-06/msg02185.html
  72 # introduces spurious #line markers into the preprocessor output.  The result
  73 # appears in gcc 5.0 and (with modification) in 5.1, making it necessary to
  74 # determine if we are using gcc, and if so, what version because the proposed
  75 # solution uses a nonstandard option.
  76 PRG=`echo "$1" | $AWK '{ sub(/^[        ]*/,""); sub(/[         ].*$/, ""); print; }' || exit 0`
  77 FSF=`"$PRG" --version 2>/dev/null || exit 0 | fgrep "Free Software Foundation" | head -n 1`
  78 ALL=`"$PRG" -dumpversion 2>/dev/null || exit 0`
  79 ONE=`echo "$ALL" | sed -e 's/\..*$//'`
  80 if test -n "$FSF" && test -n "$ALL" && test -n "$ONE" ; then
  81         if test $ONE -ge 5 ; then
  82                 echo ".. adding -P option to work around $PRG $ALL" >&2
  83                 preprocessor="$preprocessor -P"
  84         fi
  85 fi
  86
  87 PID=$$
  88 ED1=sed1_${PID}.sed
  89 ED2=sed2_${PID}.sed
  90 ED3=sed3_${PID}.sed
  91 ED4=sed4_${PID}.sed
  92 AW1=awk1_${PID}.awk
  93 AW2=awk2_${PID}.awk
  94 TMP=gen__${PID}.c
  95 trap "rm -f $ED1 $ED2 $ED3 $ED4 $AW1 $AW2 $TMP" 0 1 2 3 15
  96
  97 ALL=$USE
  98 if test "$USE" = implemented ; then
  99         CALL="call_"
 100         cat >$ED1 <<EOF1
 101 /^extern.*implemented/{
 102         h
 103         s/GCC_DEPRECATED([^)]*)//
 104         s/NCURSES_SP_NAME(\([^)]*\))/NCURSES_SP_NAME___\1/
 105         h
 106         s/^.*implemented:\([^   *]*\).*/P_POUNDCif_USE_\1_SUPPORT/p
 107         g
 108         s/^extern \([^;]*\);.*/\1/p
 109         g
 110         s/^.*implemented:\([^   *]*\).*/P_POUNDCendif/p
 111 }
 112 /^extern.*generated/{
 113         h
 114         s/^.*generated:\([^     *]*\).*/P_POUNDCif_USE_\1_SUPPORT/p
 115         g
 116         s/^extern \([^;]*\);.*/\1/p
 117         g
 118         s/^.*generated:\([^     *]*\).*/P_POUNDCendif/p
 119 }
 120 EOF1
 121 else
 122         CALL=""
 123         cat >$ED1 <<EOF1
 124 /^extern.*${ALL}/{
 125         h
 126         s/^.*${ALL}:\([^        *]*\).*/P_POUNDCif_USE_\1_SUPPORT/p
 127         g
 128         s/^extern \([^;]*\);.*/\1/p
 129         g
 130         s/^.*${ALL}:\([^        *]*\).*/P_POUNDCendif/p
 131 }
 132 EOF1
 133 fi
 134
 135 cat >$ED2 <<EOF2
 136 /^P_/b nc
 137 /(void)/b nc
 138         s/,/ a1% /
 139         s/,/ a2% /
 140         s/,/ a3% /
 141         s/,/ a4% /
 142         s/,/ a5% /
 143         s/,/ a6% /
 144         s/,/ a7% /
 145         s/,/ a8% /
 146         s/,/ a9% /
 147         s/,/ a10% /
 148         s/,/ a11% /
 149         s/,/ a12% /
 150         s/,/ a13% /
 151         s/,/ a14% /
 152         s/,/ a15% /
 153         s/*/ * /g
 154         s/%/ , /g
 155         s/)/ z)/
 156         s/\.\.\. z)/...)/
 157 :nc
 158         s/(/ ( /
 159         s/)/ )/
 160 EOF2
 161
 162 cat >$ED3 <<EOF3
 163 /^P_/{
 164         s/^P_POUNDCif_/#if /
 165         s/^P_POUNDCendif/#endif/
 166         s/^P_//
 167         b done
 168 }
 169         s/              */ /g
 170         s/  */ /g
 171         s/ ,/,/g
 172         s/( /(/g
 173         s/ )/)/g
 174         s/ gen_/ /
 175         s/^[    ]*@[    ]*@[    ]*/     /
 176 :done
 177 EOF3
 178
 179 if test "$USE" = generated ; then
 180 cat >$ED4 <<EOF
 181         s/^\(.*\) \(.*\) (\(.*\))\$/NCURSES_EXPORT(\1) (\2) (\3)/
 182         /attr_[sg]et.* z)/s,z),z GCC_UNUSED),
 183 EOF
 184 else
 185 cat >$ED4 <<EOF
 186 /^\(.*\) \(.*\) (\(.*\))\$/ {
 187         h
 188         s/^\(.*\) \(.*\) (\(.*\))\$/extern \1 call_\2 (\3);/
 189         p
 190         g
 191         s/^\(.*\) \(.*\) (\(.*\))\$/\1 call_\2 (\3)/
 192         }
 193 s/\([^_]\)NCURSES_SP_NAME___\([a-zA-Z][a-zA-Z_]*\)/\1NCURSES_SP_NAME(\2)/g
 194 EOF
 195 fi
 196
 197 cat >$AW1 <<\EOF1
 198 BEGIN   {
 199                 skip=0;
 200         }
 201 /^P_POUNDCif/ {
 202                 print "\n"
 203                 print $0
 204                 skip=0;
 205 }
 206 /^P_POUNDCendif/ {
 207                 print $0
 208                 skip=1;
 209 }
 210 $0 !~ /^P_/ {
 211         if (skip)
 212                 print "\n"
 213         skip=1;
 214
 215         first=$1
 216         for (i = 1; i <= NF; i++) {
 217                 if ( $i != "NCURSES_CONST" ) {
 218                         first = i;
 219                         break;
 220                 }
 221         }
 222         second = first + 1;
 223         returnCast = "";
 224         if ( $first == "chtype" ) {
 225                 returnType = "Chtype";
 226         } else if ( $first == "SCREEN" ) {
 227                 returnType = "SP";
 228         } else if ( $first == "WINDOW" ) {
 229                 returnType = "Win";
 230         } else if ( $first == "attr_t" || $second == "attrset" || $second == "standout" || $second == "standend" || $second == "wattrset" || $second == "wstandout" || $second == "wstandend" ) {
 231                 returnType = "IntAttr";
 232                 returnCast = "(attr_t)";
 233         } else if ( $first == "bool" || $first == "NCURSES_BOOL" ) {
 234                 returnType = "Bool";
 235         } else if ( $second == "*" ) {
 236                 returnType = ($1 == "NCURSES_CONST") ? "CPtr" : "Ptr";
 237         } else {
 238                 returnType = "Code";
 239         }
 240         myfunc = second;
 241         for (i = second; i <= NF; i++) {
 242                 if ($i != "*") {
 243                         myfunc = i;
 244                         break;
 245                 }
 246         }
 247         if (using == "implemented") {
 248                 printf "#undef %s\n", $myfunc;
 249         }
 250         print $0;
 251         print "{";
 252         argcount = 1;
 253         check = NF - 1;
 254         if ($check == "void")
 255                 argcount = 0;
 256         if (argcount != 0) {
 257                 for (i = 1; i <= NF; i++)
 258                         if ($i == ",")
 259                                 argcount++;
 260         }
 261
 262         # suppress trace-code for functions that we cannot do properly here,
 263         # since they return data.
 264         dotrace = 1;
 265         if ($myfunc ~ /innstr/)
 266                 dotrace = 0;
 267         if ($myfunc ~ /innwstr/)
 268                 dotrace = 0;
 269
 270         # workaround functions that we do not parse properly
 271         if ($myfunc ~ /ripoffline/) {
 272                 dotrace = 0;
 273                 argcount = 2;
 274                 if ($myfunc ~ /NCURSES_SP_NAME/) {
 275                         argcount = 3;
 276                 }
 277         }
 278         if ($myfunc ~ /wunctrl/) {
 279                 dotrace = 0;
 280         }
 281
 282         do_getstr = 0;
 283         if ($myfunc ~ /get[n]?str/) {
 284                 do_getstr = 1;
 285         }
 286
 287         call = "@@T((T_CALLED(\""
 288         args = ""
 289         comma = ""
 290         num = 0;
 291         pointer = 0;
 292         va_list = 0;
 293         varargs = 0;
 294         argtype = ""
 295         for (i = myfunc; i <= NF; i++) {
 296                 ch = $i;
 297                 if ( ch == "*" ) {
 298                         pointer = 1;
 299                 } else if ( ch == "va_list" ) {
 300                         va_list = 1;
 301                 } else if ( ch == "..." ) {
 302                         varargs = 1;
 303                 } else if ( ch == "char" ) {
 304                         argtype = "char";
 305                 } else if ( ch == "int" ) {
 306                         argtype = "int";
 307                 } else if ( ch == "short" ) {
 308                         argtype = "short";
 309                 } else if ( ch == "chtype" ) {
 310                         argtype = "chtype";
 311                 } else if ( ch == "attr_t" || ch == "NCURSES_ATTR_T" ) {
 312                         argtype = "attr";
 313                 }
 314
 315                 if ( ch == "," || ch == ")" ) {
 316                         argcast = "";
 317                         if (va_list) {
 318                                 call = call "%s"
 319                         } else if (varargs) {
 320                                 call = call "%s"
 321                         } else if (pointer) {
 322                                 if ( argtype == "char" ) {
 323                                         if (do_getstr) {
 324                                                 call = call "%p"
 325                                         } else {
 326                                                 call = call "%s"
 327                                         }
 328                                         comma = comma "_nc_visbuf2(" num ","
 329                                         pointer = 0;
 330                                 } else {
 331                                         call = call "%p"
 332                                         comma = comma "(const void *)"
 333                                 }
 334                         } else if (argcount != 0) {
 335                                 if ( argtype == "int" || argtype == "short" ) {
 336                                         call = call "%d"
 337                                         argtype = ""
 338                                 } else if ( argtype != "" ) {
 339                                         call = call "%s"
 340                                         comma = comma "_trace" argtype "2(" num ","
 341                                         if (argtype == "attr") {
 342                                                 argcast = "(chtype)";
 343                                         }
 344                                 } else {
 345                                         call = call "%#lx"
 346                                         comma = comma "(long)"
 347                                 }
 348                         }
 349                         if (ch == ",") {
 350                                 args = args comma "a" ++num;
 351                         } else if ( argcount != 0 ) {
 352                                 if ( va_list ) {
 353                                         args = args comma "\"va_list\""
 354                                 } else if ( varargs ) {
 355                                         args = args comma "\"...\""
 356                                 } else {
 357                                         args = args comma argcast "z"
 358                                 }
 359                         }
 360                         call = call ch
 361                         if (pointer == 0 && argcount != 0 && argtype != "" )
 362                                 args = args ")"
 363                         if (args != "")
 364                                 comma = ", "
 365                         pointer = 0;
 366                         argtype = ""
 367                 }
 368                 if ( i == myfunc || ch == "(" )
 369                         call = call ch
 370         }
 371         call = call "\")"
 372         if (args != "")
 373                 call = call ", " args
 374         call = call ")); "
 375
 376         if (dotrace)
 377                 printf "%s\n\t@@", call
 378
 379         if (match($0, "^void")) {
 380                 call = ""
 381         } else if (dotrace) {
 382                 call = sprintf("return%s( ", returnType);
 383                 if (returnCast != "") {
 384                         call = call returnCast;
 385                 }
 386         } else {
 387                 call = "@@return ";
 388         }
 389
 390         call = call $myfunc "(";
 391         for (i = 1; i < argcount; i++) {
 392                 if (i != 1)
 393                         call = call ", ";
 394                 call = call "a" i;
 395         }
 396         if ( argcount != 0 && $check != "..." ) {
 397                 if (argcount != 1)
 398                         call = call ", ";
 399                 call = call "z";
 400         }
 401         if (!match($0, "^void"))
 402                 call = call ") ";
 403         if (dotrace) {
 404                 call = call ")";
 405         }
 406         print call ";"
 407
 408         if (match($0, "^void"))
 409                 print "@@returnVoid;"
 410         print "}";
 411 }
 412 EOF1
 413
 414 cat >$AW2 <<EOF1
 415 BEGIN           {
 416                 printf "/* This file was generated by $0 $USE */\n"
 417                 print ""
 418                 print "/*"
 419                 print " * DO NOT EDIT THIS FILE BY HAND!"
 420                 if ( "$USE" == "generated" ) {
 421                         print " *"
 422                         print " * This is a file of trivial functions generated from macro"
 423                         print " * definitions in curses.h to satisfy the XSI Curses requirement"
 424                         print " * that every macro also exist as a callable function."
 425                         print " *"
 426                         print " * It will never be linked unless you call one of the entry"
 427                         print " * points with its normal macro definition disabled.  In that"
 428                         print " * case, if you have no shared libraries, it will indirectly"
 429                         print " * pull most of the rest of the library into your link image."
 430                 }
 431                 print " */"
 432                 print "#define NCURSES_ATTR_T int"
 433                 print "#include <ncurses_cfg.h>"
 434                 print ""
 435                 print "#undef NCURSES_NOMACROS  /* _this_ file uses macros */"
 436                 print ""
 437                 print "#include <curses.priv.h>"
 438                 print ""
 439                 }
 440 /^DECLARATIONS/ {start = 1; next;}
 441                 {
 442                 if (start) {
 443                         if ( "$USE" == "generated" ) {
 444                                 print \$0;
 445                         } else if ( \$0 ~ /^[{}]?\$/ ) {
 446                                 print \$0;
 447                         } else if ( \$0 ~ /;/ ) {
 448                                 print \$0;
 449                         } else {
 450                                 calls[start] = \$0;
 451                                 print \$0;
 452                                 start++;
 453                         }
 454                 }
 455                 }
 456 END             {
 457                 if ( "$USE" != "generated" ) {
 458                         print "int main(void)"
 459                         print "{"
 460                         for (n = 1; n < start; ++n) {
 461                                 value = calls[n];
 462                                 if ( value !~ /P_POUNDC/ ) {
 463                                         gsub(/[ \t]+/," ",value);
 464                                         sub(/^[0-9a-zA-Z_]+ /,"",value);
 465                                         sub(/^\* /,"",value);
 466                                         gsub(/[0-9a-zA-Z_]+ \* /,"",value);
 467                                         gsub(/ (const) /," ",value);
 468                                         gsub(/ (int|short|attr_t|chtype|wchar_t|NCURSES_BOOL|NCURSES_OUTC|NCURSES_OUTC_sp|va_list) /," ",value);
 469                                         gsub(/ void /,"",value);
 470                                         sub(/^/,"call_",value);
 471                                         gsub(/ (a[0-9]|z) /, " 0 ", value);
 472                                         gsub(/ int[ \t]*[(][^)]+[)][(][^)]+[)]/, "0", value);
 473                                         printf "\t%s;\n", value;
 474                                 } else {
 475                                         print value;
 476                                 }
 477                         }
 478                         print " return 0;"
 479                         print "}"
 480                 }
 481                 }
 482 EOF1
 483
 484 cat >$TMP <<EOF
 485 #include <ncurses_cfg.h>
 486 #undef NCURSES_NOMACROS
 487 #include <curses.h>
 488 #include <term.h>
 489 #include <unctrl.h>
 490
 491 DECLARATIONS
 492
 493 EOF
 494
 495 sed -n -f $ED1 \
 496 | sed -e 's/NCURSES_EXPORT(\(.*\)) \(.*\) (\(.*\))/\1 \2(\3)/' \
 497 | sed -f $ED2 \
 498 | $AWK -f $AW1 using=$USE \
 499 | sed \
 500         -e 's/ [ ]*$//g' \
 501         -e 's/^\([a-zA-Z_][a-zA-Z_]*[ *]*\)/\1 gen_/' \
 502         -e 's/gen_$//' \
 503         -e 's/  / /g' >>$TMP
 504
 505 cat >$ED1 <<EOF
 506 s/  / /g
 507 s/^ //
 508 s/ $//
 509 s/P_NCURSES_BOOL/NCURSES_BOOL/g
 510 EOF
 511
 512 # A patch discussed here:
 513 #       https://gcc.gnu.org/ml/gcc-patches/2014-06/msg02185.html
 514 # introduces spurious #line markers.  Work around that by ignoring the system's
 515 # attempt to define "bool" and using our own symbol here.
 516 sed -e 's/bool/P_NCURSES_BOOL/g' $TMP > $ED2
 517 cat $ED2 >$TMP
 518
 519 $preprocessor $TMP 2>/dev/null \
 520 | sed -f $ED1 \
 521 | $AWK -f $AW2 \
 522 | sed -f $ED3 \
 523 | sed \
 524         -e 's/^.*T_CALLED.*returnCode( \([a-z].*) \));/ return \1;/' \
 525         -e 's/^.*T_CALLED.*returnCode( \((wmove.*) \));/        return \1;/' \
 526         -e 's/gen_//' \
 527         -e 's/^[        ]*#/#/' \
 528         -e '/#ident/d' \
 529         -e '/#line/d' \
 530 | sed -f $ED4