1 /*********************************************************************** 2 * * 3 * This software is part of the ast package * 4 * Copyright (c) 1986-2009 AT&T Intellectual Property * 5 * and is licensed under the * 6 * Common Public License, Version 1.0 * 7 * by AT&T Intellectual Property * 8 * * 9 * A copy of the License is available at * 10 * http://www.opensource.org/licenses/cpl1.0.txt * 11 * (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9) * 12 * * 13 * Information and Software Systems Research * 14 * AT&T Research * 15 * Florham Park NJ * 16 * * 17 * Glenn Fowler <gsf@research.att.com> * 18 * * 19 ***********************************************************************/ 20 #pragma prototyped 21 /* 22 * Glenn Fowler 23 * AT&T Research 24 * 25 * common preprocessor command line argument parse 26 * called by optjoin() 27 */ 28 29 static const char usage[] = 30 "[-?\n@(#)$Id: cpp (AT&T Research) 2009-02-02 $\n]" 31 USAGE_LICENSE 32 "[+NAME?cpp - C language preprocessor]" 33 "[+DESCRIPTION?\bcpp\b is the preprocessor for all C language dialects. It is" 34 " a standalone version of the \blibpp\b(3) preprocessor library. The" 35 " C dialect implemented by \bcpp\b is determined by probing \bcc\b(1)" 36 " using \bprobe\b(1). The path of the emulated compiler can be changed" 37 " by the \b-D-X\b command line option.]" 38 "[+?If \aoutput\a is omitted then the standard output is written; if \ainput\a" 39 " is also omitted then the standard input is read. NOTE: this is an" 40 " ancient, non-standard, non-intuitiive file operand syntax that is" 41 " required by \bcc\b(1); use shell file name expansion at your peril.]" 42 "[+?\bcpp\b specific options are set by the \b-D-\b and \b-I-\b options.]" 43 44 "[C:comments?Pass comments to the output. By default comments are omitted.]" 45 "[D:define?Define the macro \aname\a to have \avalue\a; \b1\b is assumed if" 46 " \b=\b\avalue\a is omitted. If \aname\a begins with \b:\b then it is" 47 " interpreted as a \blibpp\b(3) \b#pragma pp:\b statement; if \aname\a" 48 " begins with \b%\b then it is interpreted as a \blibpp\b(3) \b#\b" 49 " directive statement; if \aname\a begins with \b-\b or \b+\b then it is" 50 " interpreted as a \blibpp\b(3) option; \b-\b turns the option on," 51 " \b+\b turns it off. Most options have a \b#pragma\b counterpart that" 52 " is listed with the option definition. Right, this is ugly, but its the" 53 " only portable way to pass options through \bcc\b(1) to" 54 " \bcpp\b:]:[name[=value]]]{" 55 " [+-D-C, pp::compatibility?Preprocess for K&R compatibility.]" 56 " [+-D-D\alevel\a, \bpp::debug\b \alevel\a?Set the debug trace level." 57 " Higher levels produce more output. Levels higher than 3" 58 " enabled only in \b-g\b compiled versions.]" 59 " [+-D-F\aname\a?Set the main input file name to \aname\a. This only" 60 " affects error message and line sync output.]" 61 " [+-D-H, pp::hosted?All directories are hosted; compatibility" 62 " warning messages from hosted directory headers are suppressed.]" 63 " [+-D-I, pp::cdir?All directories contain C headers; used only with" 64 " \b-D-+\b.]" 65 " [+-D-K, pp::keyargs?Enable the non-standard \aname=value\a macro" 66 " argument mode.]" 67 " [+-D-L\b[\aid\a]], \bpp::lineid\b [\aid\a]]?Set the line sync directive" 68 " id to \aid\a or null if omitted.]" 69 " [+-D-M, pp::nomultiple?Disable multiple include detection.]" 70 " [+-D-P, pp::passthrough?Enable the non-standard passthrough mode; may" 71 " be useful for processing non-C input.]" 72 " [+-D-Q, pp::dump?Dump macro definitions to the output so that the" 73 " output may be passed through \bcpp\b again. Used for" 74 " generating precompiled headers.]" 75 " [+-D-R, pp::transition?Enable the transition preprocessing mode. Used" 76 " for compilers that can't make up their semantics between" 77 " K&R and ISO.]" 78 " [+-D-S, pp::strict?Enable strict preprocessing semantics and warnings." 79 " Works with any mode (compatibiliy, transition," 80 " or the default ISO).]" 81 " [+-D-T\atest\a, \bpp::test\b \atest\a?Enable implementation specific" 82 " test code according to \atest\a.]" 83 " [+-D-W, pp::warn?Enable warnings in non-hosted files.]" 84 " [+-D-X\b[\acc\a]]?Preprocess for the compiler \acc\a which must be" 85 " an executable path or an executable on \b$PATH\b.]" 86 " [+-D-Y, pp::pedantic?Enable pedantic \bpp::warn\b warnings in" 87 " non-hosted files.]" 88 " [+-D-Z, pp::pool?Enable pool mode. See \blibpp\b(3).]" 89 " [+-D-d?List canonicalized \b#define\b statements for non-predefined" 90 " macros in the output. ]" 91 " [+-D-m?List canonicalized \b#define\b statements for all macros. All" 92 " other output is disabled.]" 93 " [+-D-+, pp::plusplus?Preprocess for the C++ dialect.]" 94 "}" 95 "[I:include?Append \adirectory\a to the list of directories searched for" 96 " \b#include\b files. If \adirectory\a is \b-\b then: (1) \b-I\b" 97 " directories before \b-I-\b are searched only for \"...\" include" 98 " files; (2) \b-I\b directories after \b-I-\b are searched for" 99 " \"...\" and <...> include files; (3) the directory \b.\b is searched" 100 " only if it is explicitly specified by a \b-I\b option.]:?[directory]{" 101 " [+-I-C\adirectory\a, \bpp::cdir\b \adirectory\a?Mark \adirectory\a" 102 " as a C header directory. Used with \bpp:plusplus\b.]" 103 " [+-I-D[\afile\a]]?Read the default \bprobe\b(1) definitions from" 104 " \afile\a, or ignore the default definitions if \afile\a" 105 " is omitted.]" 106 " [+-I-H\adirectory\a, \bpp::hostdir\b \adirectory\a?Mark \adirectory\a" 107 " as a hosted directory. Headers from hosted directories have" 108 " compatibility warnings disabled.]" 109 " [+-I-I\aheader\a, \bpp::ignore\b \aheader\a?Add \aheader\a to the" 110 " list of ignored headers.]" 111 " [+-I-M\afile\a?\afile\a contains a sequence of \aheader\a" 112 " [= \"\amap\a\" ]] lines, where \aheader\a is either <\aname\a>" 113 " or \"\aname\a\", and \"\amap\a\" is an explicit binding" 114 " for \aheader\a. \aheader\a is ignored if = \"\amap\a\" is" 115 " omitted.]" 116 " [+-I-R\afile\a?Include \afile\a but do not emit text or line syncs.]" 117 " [+-I-S\adirectory\a?Add \adirectory\a to the default standard include" 118 " directory list.]" 119 " [+-I-T\afile\a?Include \afile\a and emit text to the output file.]" 120 "}" 121 "[M:dependencies?Generate \bmake\b(1) dependencies. Not needed with" 122 " \bnmake\b(1). \b-M\b may be followed by optional \aflags\a to change" 123 " dependency output styles:]{" 124 " [+D?Generate dependencies in a separate \b.d\b file. Preprocessed" 125 " output is still written to \aoutput\a, or the standard output" 126 " if \aoutput\a is omitted.]" 127 " [+G?Generate missing dependencies too.]" 128 " [+M?Only generate local header dependencies; \ahosted\a headers are" 129 " omitted. Note that \ahosted\a headers are determined by" 130 " \b-I-H\b and the \bpp:hosted\b and \bpp:hostdir\b pragmas;" 131 " no special distiction is made between \"\" and <> \binclude\b" 132 " styles.]" 133 "}" 134 "[P!:sync?Emit line syncs.]" 135 "[U:undefine?Remove the definition for the macro \aname\a.]:[name]" 136 137 "[A:assert?Enter the assertion via \b#assert\b for system V" 138 " compatibility.]:[assertion]" 139 "[E:preprocess?Ignored for compatibility with ancient compilers.]" 140 "[H:include-reference?Emit \b#include\b file paths on the standard error," 141 " one per line, indented to show nesting.]" 142 "[T?If not \bgcc\b(1) then truncate identifiers to \alength\a" 143 " characters for compatibility with old AT&T (I guess only Lucent needs" 144 " them now) compilers.]#?[length]" 145 "[V:version?Emit the \blibpp\b(3) version.]" 146 "[X:argmode?Enable \aname\a=\avalue\a macro arguments for \beasel\b(1)" 147 " compatibility.]" 148 "[Y:standard?Add \adirectory\a to the list searched for" 149 " \b#include\b \b<...>\b files.]:[directory]" 150 151 "\n" 152 "\n[ input [ output ] ]\n" 153 "\n" 154 155 "[+SEE ALSO?\bcc\b(1), \bgcc\b(1), \blibpp\b(3)]" 156 ; 157 158 #include "pplib.h" 159 160 #include <ctype.h> 161 162 /* 163 * convert lint comments to pragmas 164 */ 165 166 static void 167 pplint(char* head, char* comment, char* tail, int line) 168 { 169 NoP(line); 170 if (strmatch(comment, "(ARGSUSED|PRINTFLIKE|PROTOLIB|SCANFLIKE|VARARGS)*([0-9])|CONSTCOND|CONSTANTCOND|CONSTANTCONDITION|EMPTY|FALLTHRU|FALLTHROUGH|LINTLIBRARY|LINTED*|NOTREACHED")) 171 { 172 strncopy(pp.token, comment, MAXTOKEN); 173 ppprintf("\n#%s %s:%s\n", dirname(PRAGMA), pp.pass, pp.token); 174 ppline(error_info.line, NiL); 175 } 176 } 177 178 /* 179 * if last!=0 then argv[opt_info.index]==0 with return(0) 180 * else if argv[opt_info.index]==0 then return(0) 181 * otherwise argv[opt_info.index] is the first unrecognized 182 * option with return(1) 183 * 184 * use last=0 if the preprocessor is combined with other passes 185 * so that unknown options may be interpreted for those passes 186 */ 187 188 int 189 ppargs(char** argv, int last) 190 { 191 register char* s; 192 register int c; 193 register int n; 194 char* p; 195 196 /* 197 * check the args and initialize 198 */ 199 200 if (!error_info.id) 201 error_info.id = "cpp"; 202 for (;;) 203 { 204 for (; c = optget(argv, usage); last = 0) switch (c) 205 { 206 case 'C': 207 ppop(PP_COMMENT, ppcomment); 208 break; 209 case 'D': 210 /* 211 * this allows single arg pp option extensions 212 * without touching cc 213 * (not all cc wrappers have -W...) 214 */ 215 216 switch (*(s = opt_info.arg)) 217 { 218 case '-': 219 case '+': 220 n = (*s++ == '-'); 221 while (c = *s++) switch (c) 222 { 223 case 'C': 224 ppop(PP_COMPATIBILITY, n); 225 break; 226 case 'D': 227 if (n && ((c = strtol(s, &p, 0)) || p != s)) 228 { 229 s = p; 230 n = c; 231 } 232 ppop(PP_DEBUG, -n); 233 break; 234 case 'F': 235 ppop(PP_FILENAME, n ? s : NiL); 236 goto hasarg; 237 case 'H': 238 ppop(PP_HOSTDIR, "-", n); 239 break; 240 case 'I': 241 ppop(PP_CDIR, "-", n); 242 break; 243 case 'K': 244 ppop(PP_KEYARGS, n); 245 break; 246 case 'L': 247 ppop(PP_LINEID, n && *s ? s : "line"); 248 goto hasarg; 249 case 'M': 250 ppop(PP_MULTIPLE, !n); 251 break; 252 case 'P': 253 ppop(PP_PASSTHROUGH, n); 254 break; 255 case 'Q': 256 ppop(PP_DUMP, n); 257 break; 258 case 'R': 259 ppop(PP_TRANSITION, n); 260 break; 261 case 'S': 262 ppop(PP_STRICT, n); 263 break; 264 case 'T': 265 ppop(PP_TEST, s); 266 goto hasarg; 267 case 'V': 268 ppop(PP_VENDOR, "-", n); 269 break; 270 case 'W': 271 ppop(PP_WARN, n); 272 break; 273 case 'X': 274 ppop(PP_PROBE, n && *s ? s : 0); 275 goto hasarg; 276 case 'Y': 277 ppop(PP_PEDANTIC, n); 278 break; 279 case 'Z': 280 ppop(PP_POOL, n); 281 break; 282 case 'd': 283 pp.option |= DEFINITIONS; 284 break; 285 case 'm': 286 pp.state |= NOTEXT; 287 pp.option |= KEEPNOTEXT|DEFINITIONS|PREDEFINITIONS; 288 pp.linesync = 0; 289 break; 290 case '+': 291 ppop(PP_PLUSPLUS, n); 292 break; 293 default: 294 if (pp.optarg) 295 { 296 if ((c = (*pp.optarg)(n, c, s)) > 0) goto hasarg; 297 else if (!c) break; 298 } 299 error(1, "%c%s: unknown -D option overload", n ? '-' : '+', s - 1); 300 goto hasarg; 301 } 302 hasarg: 303 break; 304 case ':': 305 ppop(PP_OPTION, s + 1); 306 break; 307 case '%': 308 ppop(PP_DIRECTIVE, s + 1); 309 break; 310 case '_': 311 if (strmatch(s, "__GNUC__*")) 312 pp.arg_style |= STYLE_gnu; 313 else if (strmatch(s, "__(ANSI|STDC|STRICT)__*") || !(pp.arg_style & STYLE_gnu) && strmatch(s, "__STRICT_ANSI__*")) 314 ppop(PP_STRICT, 1); 315 else if (strmatch(s, "__cplusplus*")) 316 ppop(PP_PLUSPLUS, 1); 317 /*FALLTHROUGH*/ 318 default: 319 ppop(PP_DEFINE, s); 320 break; 321 } 322 break; 323 case 'E': 324 /* historically ignored */ 325 break; 326 case 'I': 327 if (!(s = opt_info.arg)) 328 { 329 /* 330 * some compilers interpret `-I ...' as 331 * `-I-S' and arg ... while others interpret 332 * it as `-I...' 333 */ 334 335 p = "-S"; 336 if ((s = argv[opt_info.index]) && ((n = *s++) == '-' || n == '+') && *s++ == 'D') 337 { 338 if (isalpha(*s) || *s == '_') 339 while (isalnum(*++s) || *s == '_'); 340 if (*s && *s != '=' && *s != '-' && *s != '+') 341 p = argv[opt_info.index++]; 342 } 343 s = p; 344 } 345 switch (*s) 346 { 347 case '-': 348 case '+': 349 n = *(p = s++) == '-'; 350 c = *s++; 351 if (!n && !*s) s = 0; 352 switch (c) 353 { 354 case 0: 355 ppop(PP_LOCAL); 356 break; 357 case 'C': 358 ppop(PP_CDIR, s, n); 359 break; 360 case 'D': 361 ppop(PP_DEFAULT, s); 362 break; 363 case 'H': 364 ppop(PP_HOSTDIR, s, n); 365 break; 366 case 'I': 367 ppop(PP_IGNORE, s); 368 break; 369 case 'M': 370 ppop(PP_IGNORELIST, s); 371 break; 372 case 'R': 373 ppop(PP_READ, s); 374 break; 375 case 'S': 376 ppop(PP_STANDARD, s); 377 break; 378 case 'T': 379 ppop(PP_TEXT, s); 380 break; 381 case 'V': 382 ppop(PP_VENDOR, s, n); 383 break; 384 default: 385 error(1, "%s: unknown -I option overload", p); 386 break; 387 } 388 break; 389 default: 390 ppop(PP_INCLUDE, s); 391 break; 392 } 393 break; 394 case 'M': 395 for (n = PP_deps; argv[opt_info.index]; opt_info.offset++) 396 { 397 switch (argv[opt_info.index][opt_info.offset]) 398 { 399 case 'D': 400 n |= PP_deps_file; 401 continue; 402 case 'G': 403 n |= PP_deps_generated; 404 continue; 405 case 'M': 406 n |= PP_deps_local; 407 continue; 408 } 409 break; 410 } 411 ppop(PP_FILEDEPS, n); 412 break; 413 case 'P': 414 ppop(PP_LINE, (PPLINESYNC)0); 415 break; 416 case 'U': 417 ppop(PP_UNDEF, opt_info.arg); 418 break; 419 420 /* 421 * System V CCS compatibility 422 */ 423 424 case 'A': 425 if (isalpha(opt_info.arg[0]) || opt_info.arg[0] == '_' || opt_info.arg[0] == '$') 426 ppop(PP_ASSERT, opt_info.arg); 427 break; 428 case 'H': 429 ppop(PP_INCREF, ppincref); 430 break; 431 case 'T': 432 if (!(pp.arg_style & STYLE_gnu)) 433 ppop(PP_TRUNCATE, TRUNCLENGTH); 434 /* else enable ANSI trigraphs -- default */ 435 break; 436 case 'V': 437 error(0, "%s", pp.version); 438 break; 439 case 'X': 440 pp.arg_mode = (*(opt_info.arg + 1) || pp.arg_mode && pp.arg_mode != *opt_info.arg) ? '-' : *opt_info.arg; 441 break; 442 case 'Y': 443 if (*(s = opt_info.arg) && *(s + 1) == ',') 444 { 445 if (*s != 'I') break; 446 s += 2; 447 } 448 ppop(PP_STANDARD, s); 449 break; 450 451 /* 452 * errors 453 */ 454 455 case '?': 456 error(ERROR_USAGE|4, "%s", opt_info.arg); 457 break; 458 case ':': 459 if (!last) 460 { 461 opt_info.again = 1; 462 return(1); 463 } 464 465 /* 466 * cross your fingers 467 */ 468 469 if (!(s = argv[opt_info.index])) 470 error(3, "%s", opt_info.arg); 471 if (opt_info.offset == 2 && (pp.arg_style & STYLE_gnu)) 472 { 473 p = argv[opt_info.index + 1]; 474 if (streq(s, "-$")) 475 { 476 ppop(PP_OPTION, "noid \"$\""); 477 goto ignore; 478 } 479 else if (streq(s, "-dD")) 480 { 481 pp.option |= DEFINITIONS; 482 goto ignore; 483 } 484 else if (streq(s, "-dM")) 485 { 486 pp.state |= NOTEXT; 487 pp.option |= KEEPNOTEXT|DEFINITIONS|PREDEFINITIONS; 488 pp.linesync = 0; 489 goto ignore; 490 } 491 else if (streq(s, "-imacros")) 492 { 493 if (p) 494 { 495 ppop(PP_READ, p); 496 opt_info.index++; 497 opt_info.offset = 0; 498 } 499 goto ignore; 500 } 501 else if (streq(s, "-include")) 502 { 503 if (p) 504 { 505 ppop(PP_TEXT, p); 506 opt_info.index++; 507 opt_info.offset = 0; 508 } 509 opt_info.offset = 0; 510 goto ignore; 511 } 512 else if (strneq(s, "-lang-", 6)) 513 { 514 s += 6; 515 if (streq(s, "c")) 516 c = 0; 517 else if (streq(s, "c++")) 518 c = 1; 519 else if (streq(s, "objc")) 520 c = 2; 521 else if (streq(s, "objc++")) 522 c = 3; 523 ppop(PP_PLUSPLUS, c & 1); 524 if (c & 2) 525 ppop(PP_DIRECTIVE, "pragma pp:map \"/#(pragma )?import>/\" \"/#(pragma )?import(.*)/__STDPP__IMPORT__(\\2)/\"\n\ 526 #macdef __STDPP__IMPORT__(x)\n\ 527 #pragma pp:noallmultiple\n\ 528 #include x\n\ 529 #pragma pp:allmultiple\n\ 530 #endmac"); 531 goto ignore; 532 } 533 else if (streq(s, "-lint")) 534 { 535 ppop(PP_COMMENT, pplint); 536 goto ignore; 537 } 538 } 539 s += opt_info.offset - 1; 540 if (strmatch(s, "i*.h")) 541 ppop((pp.arg_style & STYLE_gnu) || s[1] == '/' ? PP_READ : PP_TEXT, s + 1); 542 else if (strmatch(s, "*@(nostandard|nostdinc)*")) 543 ppop(PP_STANDARD, ""); 544 else if (strmatch(s, "*@(exten|xansi)*|std")) 545 { 546 ppop(PP_COMPATIBILITY, 0); 547 ppop(PP_TRANSITION, 1); 548 } 549 else if (strmatch(s, "*@(ansi|conform|pedantic|stand|std1|strict[!-])*")) 550 { 551 ppop(PP_COMPATIBILITY, 0); 552 ppop(PP_STRICT, 1); 553 if (strmatch(s, "*pedantic*")) 554 ppop(PP_PEDANTIC, 1); 555 } 556 else if (strmatch(s, "*@(trans)*")) 557 { 558 ppop(PP_COMPATIBILITY, 1); 559 ppop(PP_TRANSITION, 1); 560 } 561 else if (strmatch(s, "*@(classic|compat|std0|tradition|[kK][n&+][rR])*")) 562 { 563 ppop(PP_COMPATIBILITY, 1); 564 ppop(PP_TRANSITION, 0); 565 } 566 else if (strmatch(s, "*@(plusplus|++)*")) 567 ppop(PP_PLUSPLUS, 1); 568 else if (strmatch(s, "*@(warn)*")) 569 ppop(PP_WARN, 1); 570 571 /* 572 * ignore unknown options 573 * the probe info takes care of these 574 * fails if an option value is in the next arg 575 * and this is the last option 576 */ 577 578 if (argv[opt_info.index + 1] && argv[opt_info.index + 1][0] != '-' && argv[opt_info.index + 2] && argv[opt_info.index + 2][0] == '-') 579 { 580 opt_info.index++; 581 opt_info.offset = 0; 582 } 583 ignore: 584 while (argv[opt_info.index][opt_info.offset]) opt_info.offset++; 585 break; 586 } 587 if (!(s = argv[opt_info.index])) return(0); 588 switch (pp.arg_file) 589 { 590 case 0: 591 if (*s != '-' || *(s + 1)) ppop(PP_INPUT, s); 592 break; 593 case 1: 594 if (*s != '-' || *(s + 1)) ppop(PP_OUTPUT, s); 595 break; 596 default: 597 if (!last) return(1); 598 error(1, "%s: extraneous argument ignored", s); 599 break; 600 } 601 pp.arg_file++; 602 if (!argv[++opt_info.index]) return(0); 603 604 /* 605 * old versions allow options after file args 606 */ 607 } 608 } 609