sys/tools/makeobjops.awk

   1 #!/usr/bin/awk -f
   2
   3 #-
   4 # Copyright (c) 1992, 1993
   5 #        The Regents of the University of California.  All rights reserved.
   6 #
   7 # Redistribution and use in source and binary forms, with or without
   8 # modification, are permitted provided that the following conditions
   9 # are met:
  10 # 1. Redistributions of source code must retain the above copyright
  11 #    notice, this list of conditions and the following disclaimer.
  12 # 2. Redistributions in binary form must reproduce the above copyright
  13 #    notice, this list of conditions and the following disclaimer in the
  14 #    documentation and/or other materials provided with the distribution.
  15 # 4. Neither the name of the University nor the names of its contributors
  16 #    may be used to endorse or promote products derived from this software
  17 #    without specific prior written permission.
  18 #
  19 # THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  20 # ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  21 # IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  22 # ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  23 # FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  24 # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  25 # OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  26 # HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  27 # LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  28 # OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  29 # SUCH DAMAGE.
  30 #
  31 # From @(#)vnode_if.sh        8.1 (Berkeley) 6/10/93
  32 # From @(#)makedevops.sh 1.1 1998/06/14 13:53:12 dfr Exp $
  33 # From @(#)makedevops.sh ?.? 1998/10/05
  34 # From src/sys/kern/makedevops.pl,v 1.12 1999/11/22 14:40:04 n_hibma Exp
  35 # From src/sys/kern/makeobjops.pl,v 1.8 2001/11/16 02:02:42 joe Exp
  36 #
  37 # $FreeBSD$
  38
  39 #
  40 #   Script to produce kobj front-end sugar.
  41 #
  42
  43 function usage ()
  44 {
  45         print "usage: makeobjops.awk <srcfile.m> [-d] [-p] [-l <nr>] [-c|-h]";
  46         print "where -c   produce only .c files";
  47         print "      -h   produce only .h files";
  48         print "      -p   use the path component in the source file for destination dir";
  49         print "      -l   set line width for output files [80]";
  50         print "      -d   switch on debugging";
  51         exit 1;
  52 }
  53
  54 function warn (msg)
  55 {
  56         print "makeobjops.awk:", msg > "/dev/stderr";
  57 }
  58
  59 function warnsrc (msg)
  60 {
  61         warn(src ":" lineno ": " msg);
  62 }
  63
  64 function debug (msg)
  65 {
  66         if (opt_d)
  67                 warn(msg);
  68 }
  69
  70 function die (msg)
  71 {
  72         warn(msg);
  73         exit 1;
  74 }
  75
  76 #   These are just for convenience ...
  77 function printc(s) {if (opt_c) print s > ctmpfilename;}
  78 function printh(s) {if (opt_h) print s > htmpfilename;}
  79
  80 #
  81 #   If a line exceeds maxlength, split it into multiple
  82 #   lines at commas.  Subsequent lines are indented by
  83 #   the specified number of spaces.
  84 #
  85 #   In other words:  Lines are split by replacing ", "
  86 #   by ",\n" plus indent spaces.
  87 #
  88
  89 function format_line (line, maxlength, indent)
  90 {
  91         rline = "";
  92
  93         while (length(line) > maxlength) {
  94                 #
  95                 #   Find the rightmost ", " so that the part
  96                 #   to the left of it is just within maxlength.
  97                 #   If there is none, give up and leave it as-is.
  98                 #
  99                 if (!match(substr(line, 1, maxlength + 1), /^.*, /))
 100                         break;
 101                 rline = rline substr(line, 1, RLENGTH - 1) "\n";
 102                 line = sprintf("%*s", indent, "") substr(line, RLENGTH + 1);
 103         }
 104         return rline line;
 105 }
 106
 107 #
 108 #   Join an array into a string.
 109 #
 110
 111 function join (separator, array, num)
 112 {
 113         _result = ""
 114         if (num) {
 115                 while (num > 1)
 116                         _result = separator array[num--] _result;
 117                 _result = array[1] _result;
 118         }
 119         return _result;
 120 }
 121
 122 #
 123 #   Execute a system command and report if it failed.
 124 #
 125
 126 function system_check (cmd)
 127 {
 128         if ((rc = system(cmd)))
 129                 warn(cmd " failed (" rc ")");
 130 }
 131
 132 #
 133 #   Handle "INTERFACE" line.
 134 #
 135
 136 function handle_interface ()
 137 {
 138         intname = $2;
 139         sub(/;$/, "", intname);
 140         if (intname !~ /^[a-z_][a-z0-9_]*$/) {
 141                 debug($0);
 142                 warnsrc("Invalid interface name '" intname "', use [a-z_][a-z0-9_]*");
 143                 error = 1;
 144                 return;
 145         }
 146         if (!/;[        ]*$/)
 147                 warnsrc("Semicolon missing at end of line, no problem");
 148
 149         debug("Interface " intname);
 150
 151         printh("#ifndef _" intname "_if_h_");
 152         printh("#define _" intname "_if_h_\n");
 153         printc("#include \"" intname "_if.h\"\n");
 154 }
 155
 156 #
 157 # Pass doc comments through to the C file
 158 #
 159 function handle_doc ()
 160 {
 161         doc = ""
 162         while (!/\*\//) {
 163                 doc = doc $0 "\n";
 164                 getline < src;
 165                 lineno++;
 166         }
 167         doc = doc $0 "\n";
 168         return doc;
 169 }
 170
 171 #
 172 #   Handle "CODE" and "HEADER" sections.
 173 #   Returns the code as-is.
 174 #
 175
 176 function handle_code ()
 177 {
 178         code = "\n";
 179         getline < src;
 180         indent = $0;
 181         sub(/[^  ].*$/, "", indent);    # find the indent used
 182         while (!/^}/) {
 183                 sub("^" indent, "");    # remove the indent
 184                 code = code $0 "\n";
 185                 getline < src;
 186                 lineno++;;
 187         }
 188         return code;
 189 }
 190
 191 #
 192 #   Handle "METHOD" and "STATICMETHOD" sections.
 193 #
 194
 195 function handle_method (static, doc)
 196 {
 197         #
 198         #   Get the return type and function name and delete that from
 199         #   the line. What is left is the possibly first function argument
 200         #   if it is on the same line.
 201         #
 202         if (!intname) {
 203                 warnsrc("No interface name defined");
 204                 error = 1;
 205                 return;
 206         }
 207         sub(/^[^        ]+[     ]+/, "");
 208         ret = $0;
 209         sub(/[  ]*\{.*$/, "", ret);
 210         name = ret;
 211         sub(/^.*[       ]/, "", name);  # last element is name of method
 212         sub(/[  ]+[^    ]+$/, "", ret); # return type
 213         debug("Method: name=" name " return type=" ret);
 214
 215         sub(/^[^\{]*\{[  ]*/, "");
 216
 217         if (!name || !ret) {
 218                 debug($0);
 219                 warnsrc("Invalid method specification");
 220                 error = 1;
 221                 return;
 222         }
 223
 224         if (name !~ /^[a-z_][a-z_0-9]*$/) {
 225                 warnsrc("Invalid method name '" name "', use [a-z_][a-z0-9_]*");
 226                 error = 1;
 227                 return;
 228         }
 229
 230         if (methods[name]) {
 231                 warnsrc("Duplicate method name");
 232                 error = 1;
 233                 return;
 234         }
 235         methods[name] = name;
 236
 237         line = $0;
 238         while (line !~ /\}/ && (getline < src) > 0) {
 239                 line = line " " $0;
 240                 lineno++
 241         }
 242
 243         default_function = "";
 244         if (!match(line, /\};?/)) {
 245                 warnsrc("Premature end of file");
 246                 error = 1;
 247                 return;
 248         }
 249         extra = substr(line, RSTART + RLENGTH);
 250         if (extra ~ /[   ]*DEFAULT[     ]*[a-zA-Z_][a-zA-Z_0-9]*[       ]*;/) {
 251                 default_function = extra;
 252                 sub(/.*DEFAULT[  ]*/, "", default_function);
 253                 sub(/[;         ]+.*$/, "", default_function);
 254         }
 255         else if (extra && opt_d) {
 256                 #   Warn about garbage at end of line.
 257                 warnsrc("Ignored '" extra "'");
 258         }
 259         sub(/\};?.*$/, "", line);
 260
 261         #
 262         #   Create a list of variables without the types prepended.
 263         #
 264         sub(/^[  ]+/, "", line);        # remove leading ...
 265         sub(/[  ]+$/, "", line);        # ... and trailing whitespace
 266         gsub(/[  ]+/, " ", line);       # remove double spaces
 267
 268         num_arguments = split(line, arguments, / *; */) - 1;
 269         delete varnames;                # list of varnames
 270         num_varnames = 0;
 271         for (i = 1; i <= num_arguments; i++) {
 272                 if (!arguments[i])
 273                         continue;       # skip argument if argument is empty
 274                 num_ar = split(arguments[i], ar, /[*    ]+/);
 275                 if (num_ar < 2) {       # only 1 word in argument?
 276                         warnsrc("no type for '" arguments[i] "'");
 277                         error = 1;
 278                         return;
 279                 }
 280                 #   Last element is name of variable.
 281                 varnames[++num_varnames] = ar[num_ar];
 282         }
 283
 284         argument_list = join(", ", arguments, num_arguments);
 285         varname_list = join(", ", varnames, num_varnames);
 286
 287         if (opt_d) {
 288                 warn("Arguments: " argument_list);
 289                 warn("Varnames: " varname_list);
 290         }
 291
 292         mname = intname "_" name;       # method name
 293         umname = toupper(mname);        # uppercase method name
 294
 295         firstvar = varnames[1];
 296
 297         if (default_function == "")
 298                 default_function = "kobj_error_method";
 299
 300         # the method description
 301         printh("/** @brief Unique descriptor for the " umname "() method */");
 302         printh("extern struct kobjop_desc " mname "_desc;");
 303         # the method typedef
 304         printh("/** @brief A function implementing the " umname "() method */");
 305         prototype = "typedef " ret " " mname "_t(";
 306         printh(format_line(prototype argument_list ");",
 307             line_width, length(prototype)));
 308
 309         # Print out the method desc
 310         printc("struct kobjop_desc " mname "_desc = {");
 311         printc("\t0, { &" mname "_desc, (kobjop_t)" default_function " }");
 312         printc("};\n");
 313
 314         # Print out the method itself
 315         printh(doc);
 316         if (0) {                # haven't chosen the format yet
 317                 printh("static __inline " ret " " umname "(" varname_list ")");
 318                 printh("\t" join(";\n\t", arguments, num_arguments) ";");
 319         }
 320         else {
 321                 prototype = "static __inline " ret " " umname "(";
 322                 printh(format_line(prototype argument_list ")",
 323                     line_width, length(prototype)));
 324         }
 325         printh("{");
 326         printh("\tkobjop_t _m;");
 327         if (!static)
 328                 firstvar = "((kobj_t)" firstvar ")";
 329         printh("\tKOBJOPLOOKUP(" firstvar "->ops," mname ");");
 330         retrn =  (ret != "void") ? "return " : "";
 331         printh("\t" retrn "((" mname "_t *) _m)(" varname_list ");");
 332         printh("}\n");
 333 }
 334
 335 #
 336 #   Begin of the main program.
 337 #
 338
 339 BEGIN {
 340
 341 line_width = 80;
 342 gerror = 0;
 343
 344 #
 345 #   Process the command line.
 346 #
 347
 348 num_files = 0;
 349
 350 for (i = 1; i < ARGC; i++) {
 351         if (ARGV[i] ~ /^-/) {
 352                 #
 353                 #   awk doesn't have getopt(), so we have to do it ourselves.
 354                 #   This is a bit clumsy, but it works.
 355                 #
 356                 for (j = 2; j <= length(ARGV[i]); j++) {
 357                         o = substr(ARGV[i], j, 1);
 358                         if      (o == "c")      opt_c = 1;
 359                         else if (o == "h")      opt_h = 1;
 360                         else if (o == "p")      opt_p = 1;
 361                         else if (o == "d")      opt_d = 1;
 362                         else if (o == "l") {
 363                                 if (length(ARGV[i]) > j) {
 364                                         opt_l = substr(ARGV[i], j + 1);
 365                                         break;
 366                                 }
 367                                 else {
 368                                         if (++i < ARGC)
 369                                                 opt_l = ARGV[i];
 370                                         else
 371                                                 usage();
 372                                 }
 373                         }
 374                         else
 375                                 usage();
 376                 }
 377         }
 378         else if (ARGV[i] ~ /\.m$/)
 379                 filenames[num_files++] = ARGV[i];
 380         else
 381                 usage();
 382 }
 383
 384 if (!num_files || !(opt_c || opt_h))
 385         usage();
 386
 387 if (opt_p)
 388         debug("Will produce files in original not in current directory");
 389
 390 if (opt_l) {
 391         if (opt_l !~ /^[0-9]+$/ || opt_l < 1)
 392                 die("Invalid line width '" opt_l "'");
 393         line_width = opt_l;
 394         debug("Line width set to " line_width);
 395 }
 396
 397 for (i = 0; i < num_files; i++)
 398         debug("Filename: " filenames[i]);
 399
 400 for (file_i = 0; file_i < num_files; file_i++) {
 401         src = filenames[file_i];
 402         cfilename = hfilename = src;
 403         sub(/\.m$/, ".c", cfilename);
 404         sub(/\.m$/, ".h", hfilename);
 405         if (!opt_p) {
 406                 sub(/^.*\//, "", cfilename);
 407                 sub(/^.*\//, "", hfilename);
 408         }
 409
 410         debug("Processing from " src " to " cfilename " / " hfilename);
 411
 412         ctmpfilename = cfilename ".tmp";
 413         htmpfilename = hfilename ".tmp";
 414
 415         common_head = \
 416             "/*\n" \
 417             " * This file is produced automatically.\n" \
 418             " * Do not modify anything in here by hand.\n" \
 419             " *\n" \
 420             " * Created from source file\n" \
 421             " *   " src "\n" \
 422             " * with\n" \
 423             " *   makeobjops.awk\n" \
 424             " *\n" \
 425             " * See the source file for legal information\n" \
 426             " */\n";
 427
 428         printc(common_head "\n" \
 429             "#include <sys/param.h>\n" \
 430             "#include <sys/queue.h>\n" \
 431             "#include <sys/kernel.h>\n" \
 432             "#include <sys/kobj.h>");
 433
 434         printh(common_head);
 435
 436         delete methods;         # clear list of methods
 437         intname = "";
 438         lineno = 0;
 439         error = 0;              # to signal clean up and gerror setting
 440         lastdoc = "";
 441
 442         while (!error && (getline < src) > 0) {
 443                 lineno++;
 444
 445                 #
 446                 #   Take special notice of include directives.
 447                 #
 448                 if (/^#[        ]*include[      ]+["<][^">]+[">]/) {
 449                         incld = $0;
 450                         sub(/^#[        ]*include[      ]+/, "", incld);
 451                         debug("Included file: " incld);
 452                         printc("#include " incld);
 453                 }
 454
 455                 sub(/#.*/, "");         # remove comments
 456                 sub(/^[  ]+/, "");      # remove leading ...
 457                 sub(/[  ]+$/, "");      # ... and trailing whitespace
 458
 459                 if (/^$/) {             # skip empty lines
 460                 }
 461                 else if (/^\/\*\*/)
 462                         lastdoc = handle_doc();
 463                 else if (/^INTERFACE[   ]+[^    ;]*[    ]*;?[   ]*$/) {
 464                         printh(lastdoc);
 465                         lastdoc = "";
 466                         handle_interface();
 467                 } else if (/^CODE[      ]*{$/)
 468                         printc(handle_code());
 469                 else if (/^HEADER[       ]*{$/)
 470                         printh(handle_code());
 471                 else if (/^METHOD/) {
 472                         handle_method(0, lastdoc);
 473                         lastdoc = "";
 474                 } else if (/^STATICMETHOD/) {
 475                         handle_method(1, lastdoc);
 476                         lastdoc = "";
 477                 } else {
 478                         debug($0);
 479                         warnsrc("Invalid line encountered");
 480                         error = 1;
 481                 }
 482         }
 483
 484         #
 485         #   Print the final '#endif' in the header file.
 486         #
 487         printh("#endif /* _" intname "_if_h_ */");
 488
 489         close (ctmpfilename);
 490         close (htmpfilename);
 491
 492         if (error) {
 493                 warn("Output skipped");
 494                 system_check("rm -f " ctmpfilename " " htmpfilename);
 495                 gerror = 1;
 496         }
 497         else {
 498                 if (opt_c)
 499                         system_check("mv -f " ctmpfilename " " cfilename);
 500                 if (opt_h)
 501                         system_check("mv -f " htmpfilename " " hfilename);
 502         }
 503 }
 504
 505 exit gerror;
 506
 507 }