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 1.43 2011/01/22 19:47:29 tom Exp $)
   6 #
   7 ##############################################################################
   8 # Copyright (c) 1998-2010,2011 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.
  55 #
  56
  57 # keep the editing independent of locale:
  58 if test "${LANGUAGE+set}"    = set; then LANGUAGE=C;    export LANGUAGE;    fi
  59 if test "${LANG+set}"        = set; then LANG=C;        export LANG;        fi
  60 if test "${LC_ALL+set}"      = set; then LC_ALL=C;      export LC_ALL;      fi
  61 if test "${LC_MESSAGES+set}" = set; then LC_MESSAGES=C; export LC_MESSAGES; fi
  62 if test "${LC_CTYPE+set}"    = set; then LC_CTYPE=C;    export LC_CTYPE;    fi
  63 if test "${LC_COLLATE+set}"  = set; then LC_COLLATE=C;  export LC_COLLATE;  fi
  64
  65 preprocessor="$1 -DNCURSES_INTERNALS -I../include"
  66 AWK="$2"
  67 USE="$3"
  68
  69 PID=$$
  70 ED1=sed1_${PID}.sed
  71 ED2=sed2_${PID}.sed
  72 ED3=sed3_${PID}.sed
  73 ED4=sed4_${PID}.sed
  74 AW1=awk1_${PID}.awk
  75 AW2=awk2_${PID}.awk
  76 TMP=gen__${PID}.c
  77 trap "rm -f $ED1 $ED2 $ED3 $ED4 $AW1 $AW2 $TMP" 0 1 2 5 15
  78
  79 ALL=$USE
  80 if test "$USE" = implemented ; then
  81         CALL="call_"
  82         cat >$ED1 <<EOF1
  83 /^extern.*implemented/{
  84         h
  85         s/NCURSES_SP_NAME(\([^)]*\))/NCURSES_SP_NAME___\1/
  86         h
  87         s/^.*implemented:\([^   *]*\).*/P_POUNDCif_USE_\1_SUPPORT/p
  88         g
  89         s/^extern \([^;]*\);.*/\1/p
  90         g
  91         s/^.*implemented:\([^   *]*\).*/P_POUNDCendif/p
  92 }
  93 /^extern.*generated/{
  94         h
  95         s/^.*generated:\([^     *]*\).*/P_POUNDCif_USE_\1_SUPPORT/p
  96         g
  97         s/^extern \([^;]*\);.*/\1/p
  98         g
  99         s/^.*generated:\([^     *]*\).*/P_POUNDCendif/p
 100 }
 101 EOF1
 102 else
 103         CALL=""
 104         cat >$ED1 <<EOF1
 105 /^extern.*${ALL}/{
 106         h
 107         s/^.*${ALL}:\([^        *]*\).*/P_POUNDCif_USE_\1_SUPPORT/p
 108         g
 109         s/^extern \([^;]*\);.*/\1/p
 110         g
 111         s/^.*${ALL}:\([^        *]*\).*/P_POUNDCendif/p
 112 }
 113 EOF1
 114 fi
 115
 116 cat >$ED2 <<EOF2
 117 /^P_/b nc
 118 /(void)/b nc
 119         s/,/ a1% /
 120         s/,/ a2% /
 121         s/,/ a3% /
 122         s/,/ a4% /
 123         s/,/ a5% /
 124         s/,/ a6% /
 125         s/,/ a7% /
 126         s/,/ a8% /
 127         s/,/ a9% /
 128         s/,/ a10% /
 129         s/,/ a11% /
 130         s/,/ a12% /
 131         s/,/ a13% /
 132         s/,/ a14% /
 133         s/,/ a15% /
 134         s/*/ * /g
 135         s/%/ , /g
 136         s/)/ z)/
 137         s/\.\.\. z)/...)/
 138 :nc
 139         s/(/ ( /
 140         s/)/ )/
 141 EOF2
 142
 143 cat >$ED3 <<EOF3
 144 /^P_/{
 145         s/^P_POUNDCif_/#if /
 146         s/^P_POUNDCendif/#endif/
 147         s/^P_//
 148         b done
 149 }
 150         s/              */ /g
 151         s/  */ /g
 152         s/ ,/,/g
 153         s/( /(/g
 154         s/ )/)/g
 155         s/ gen_/ /
 156         s/^[    ]*@[    ]*@[    ]*/     /
 157 :done
 158 EOF3
 159
 160 if test "$USE" = generated ; then
 161 cat >$ED4 <<EOF
 162         s/^\(.*\) \(.*\) (\(.*\))\$/NCURSES_EXPORT(\1) (\2) (\3)/
 163 EOF
 164 else
 165 cat >$ED4 <<EOF
 166 /^\(.*\) \(.*\) (\(.*\))\$/ {
 167         h
 168         s/^\(.*\) \(.*\) (\(.*\))\$/extern \1 call_\2 (\3);/
 169         p
 170         g
 171         s/^\(.*\) \(.*\) (\(.*\))\$/\1 call_\2 (\3)/
 172         }
 173 s/\([^_]\)NCURSES_SP_NAME___\([a-zA-Z][a-zA-Z_]*\)/\1NCURSES_SP_NAME(\2)/g
 174 EOF
 175 fi
 176
 177 cat >$AW1 <<\EOF1
 178 BEGIN   {
 179                 skip=0;
 180         }
 181 /^P_POUNDCif/ {
 182                 print "\n"
 183                 print $0
 184                 skip=0;
 185 }
 186 /^P_POUNDCendif/ {
 187                 print $0
 188                 skip=1;
 189 }
 190 $0 !~ /^P_/ {
 191         if (skip)
 192                 print "\n"
 193         skip=1;
 194
 195         first=$1
 196         for (i = 1; i <= NF; i++) {
 197                 if ( $i != "NCURSES_CONST" ) {
 198                         first = i;
 199                         break;
 200                 }
 201         }
 202         second = first + 1;
 203         returnCast = "";
 204         if ( $first == "chtype" ) {
 205                 returnType = "Chtype";
 206         } else if ( $first == "SCREEN" ) {
 207                 returnType = "SP";
 208         } else if ( $first == "WINDOW" ) {
 209                 returnType = "Win";
 210         } else if ( $first == "attr_t" || $second == "attrset" || $second == "standout" || $second == "standend" || $second == "wattrset" || $second == "wstandout" || $second == "wstandend" ) {
 211                 returnType = "IntAttr";
 212                 returnCast = "(attr_t)";
 213         } else if ( $first == "bool" || $first == "NCURSES_BOOL" ) {
 214                 returnType = "Bool";
 215         } else if ( $second == "*" ) {
 216                 returnType = "Ptr";
 217         } else {
 218                 returnType = "Code";
 219         }
 220         myfunc = second;
 221         for (i = second; i <= NF; i++) {
 222                 if ($i != "*") {
 223                         myfunc = i;
 224                         break;
 225                 }
 226         }
 227         print $0;
 228         print "{";
 229         argcount = 1;
 230         check = NF - 1;
 231         if ($check == "void")
 232                 argcount = 0;
 233         if (argcount != 0) {
 234                 for (i = 1; i <= NF; i++)
 235                         if ($i == ",")
 236                                 argcount++;
 237         }
 238
 239         # suppress trace-code for functions that we cannot do properly here,
 240         # since they return data.
 241         dotrace = 1;
 242         if ($myfunc ~ /innstr/)
 243                 dotrace = 0;
 244         if ($myfunc ~ /innwstr/)
 245                 dotrace = 0;
 246
 247         # workaround functions that we do not parse properly
 248         if ($myfunc ~ /ripoffline/) {
 249                 dotrace = 0;
 250                 argcount = 2;
 251                 if ($myfunc ~ /NCURSES_SP_NAME/) {
 252                         argcount = 3;
 253                 }
 254         }
 255         if ($myfunc ~ /wunctrl/) {
 256                 dotrace = 0;
 257         }
 258
 259         call = "@@T((T_CALLED(\""
 260         args = ""
 261         comma = ""
 262         num = 0;
 263         pointer = 0;
 264         va_list = 0;
 265         varargs = 0;
 266         argtype = ""
 267         for (i = myfunc; i <= NF; i++) {
 268                 ch = $i;
 269                 if ( ch == "*" ) {
 270                         pointer = 1;
 271                 } else if ( ch == "va_list" ) {
 272                         va_list = 1;
 273                 } else if ( ch == "..." ) {
 274                         varargs = 1;
 275                 } else if ( ch == "char" ) {
 276                         argtype = "char";
 277                 } else if ( ch == "int" ) {
 278                         argtype = "int";
 279                 } else if ( ch == "short" ) {
 280                         argtype = "short";
 281                 } else if ( ch == "chtype" ) {
 282                         argtype = "chtype";
 283                 } else if ( ch == "attr_t" || ch == "NCURSES_ATTR_T" ) {
 284                         argtype = "attr";
 285                 }
 286
 287                 if ( ch == "," || ch == ")" ) {
 288                         argcast = "";
 289                         if (va_list) {
 290                                 call = call "%s"
 291                         } else if (varargs) {
 292                                 call = call "%s"
 293                         } else if (pointer) {
 294                                 if ( argtype == "char" ) {
 295                                         call = call "%s"
 296                                         comma = comma "_nc_visbuf2(" num ","
 297                                         pointer = 0;
 298                                 } else {
 299                                         call = call "%p"
 300                                         comma = comma "(const void *)"
 301                                 }
 302                         } else if (argcount != 0) {
 303                                 if ( argtype == "int" || argtype == "short" ) {
 304                                         call = call "%d"
 305                                         argtype = ""
 306                                 } else if ( argtype != "" ) {
 307                                         call = call "%s"
 308                                         comma = comma "_trace" argtype "2(" num ","
 309                                         if (argtype == "attr") {
 310                                                 argcast = "(chtype)";
 311                                         }
 312                                 } else {
 313                                         call = call "%#lx"
 314                                         comma = comma "(long)"
 315                                 }
 316                         }
 317                         if (ch == ",") {
 318                                 args = args comma "a" ++num;
 319                         } else if ( argcount != 0 ) {
 320                                 if ( va_list ) {
 321                                         args = args comma "\"va_list\""
 322                                 } else if ( varargs ) {
 323                                         args = args comma "\"...\""
 324                                 } else {
 325                                         args = args comma argcast "z"
 326                                 }
 327                         }
 328                         call = call ch
 329                         if (pointer == 0 && argcount != 0 && argtype != "" )
 330                                 args = args ")"
 331                         if (args != "")
 332                                 comma = ", "
 333                         pointer = 0;
 334                         argtype = ""
 335                 }
 336                 if ( i == myfunc || ch == "(" )
 337                         call = call ch
 338         }
 339         call = call "\")"
 340         if (args != "")
 341                 call = call ", " args
 342         call = call ")); "
 343
 344         if (dotrace)
 345                 printf "%s", call
 346
 347         if (match($0, "^void")) {
 348                 call = ""
 349         } else if (dotrace) {
 350                 call = sprintf("return%s( ", returnType);
 351                 if (returnCast != "") {
 352                         call = call returnCast;
 353                 }
 354         } else {
 355                 call = "@@return ";
 356         }
 357
 358         call = call $myfunc "(";
 359         for (i = 1; i < argcount; i++) {
 360                 if (i != 1)
 361                         call = call ", ";
 362                 call = call "a" i;
 363         }
 364         if ( argcount != 0 && $check != "..." ) {
 365                 if (argcount != 1)
 366                         call = call ", ";
 367                 call = call "z";
 368         }
 369         if (!match($0, "^void"))
 370                 call = call ") ";
 371         if (dotrace) {
 372                 call = call ")";
 373         }
 374         print call ";"
 375
 376         if (match($0, "^void"))
 377                 print "@@returnVoid;"
 378         print "}";
 379 }
 380 EOF1
 381
 382 cat >$AW2 <<EOF1
 383 BEGIN           {
 384                 print "/*"
 385                 print " * DO NOT EDIT THIS FILE BY HAND!"
 386                 printf " * It is generated by $0 %s.\n", "$USE"
 387                 if ( "$USE" == "generated" ) {
 388                         print " *"
 389                         print " * This is a file of trivial functions generated from macro"
 390                         print " * definitions in curses.h to satisfy the XSI Curses requirement"
 391                         print " * that every macro also exist as a callable function."
 392                         print " *"
 393                         print " * It will never be linked unless you call one of the entry"
 394                         print " * points with its normal macro definition disabled.  In that"
 395                         print " * case, if you have no shared libraries, it will indirectly"
 396                         print " * pull most of the rest of the library into your link image."
 397                 }
 398                 print " */"
 399                 print "#define NCURSES_ATTR_T int"
 400                 print "#include <ncurses_cfg.h>"
 401                 print ""
 402                 print "#undef NCURSES_NOMACROS  /* _this_ file uses macros */"
 403                 print ""
 404                 print "#include <curses.priv.h>"
 405                 print ""
 406                 print "#undef vw_scanw"
 407                 print "#undef vwscanw"
 408                 print ""
 409                 print "#undef vw_printw"
 410                 print "#undef vwprintw"
 411                 }
 412 /^DECLARATIONS/ {start = 1; next;}
 413                 {if (start) print \$0;}
 414 END             {
 415                 if ( "$USE" != "generated" ) {
 416                         print "int main(void) { return 0; }"
 417                 }
 418                 }
 419 EOF1
 420
 421 cat >$TMP <<EOF
 422 #include <ncurses_cfg.h>
 423 #undef NCURSES_NOMACROS
 424 #include <curses.h>
 425
 426 DECLARATIONS
 427
 428 EOF
 429
 430 sed -n -f $ED1 \
 431 | sed -e 's/NCURSES_EXPORT(\(.*\)) \(.*\) (\(.*\))/\1 \2(\3)/' \
 432 | sed -f $ED2 \
 433 | $AWK -f $AW1 using=$USE \
 434 | sed \
 435         -e 's/ [ ]*$//g' \
 436         -e 's/^\([a-zA-Z_][a-zA-Z_]*[ *]*\)/\1 gen_/' \
 437         -e 's/gen_$//' \
 438         -e 's/  / /g' >>$TMP
 439
 440 $preprocessor $TMP 2>/dev/null \
 441 | sed \
 442         -e 's/  / /g' \
 443         -e 's/^ //' \
 444         -e 's/_Bool/NCURSES_BOOL/g' \
 445 | $AWK -f $AW2 \
 446 | sed -f $ED3 \
 447 | sed \
 448         -e 's/^.*T_CALLED.*returnCode( \([a-z].*) \));/ return \1;/' \
 449         -e 's/^.*T_CALLED.*returnCode( \((wmove.*) \));/        return \1;/' \
 450         -e 's/gen_//' \
 451         -e 's/^[        ]*#/#/' \
 452         -e '/#ident/d' \
 453         -e '/#line/d' \
 454 | sed -f $ED4