1 /*********************************************************************** 2 * * 3 * This software is part of the ast package * 4 * Copyright (c) 1986-2007 AT&T Knowledge Ventures * 5 * and is licensed under the * 6 * Common Public License, Version 1.0 * 7 * by AT&T Knowledge Ventures * 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) 2006-01-11 $\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 pedantic 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-Z, pp::pool?Enable pool mode. See \blibpp\b(3).]" 87 " [+-D-d?List canonicalized \b#define\b statements for non-predefined" 88 " macros in the output. ]" 89 " [+-D-m?List canonicalized \b#define\b statements for all macros. All" 90 " other output is disabled.]" 91 " [+-D-+, pp::plusplus?Preprocess for the C++ dialect.]" 92 "}" 93 "[I:include?Append \adirectory\a to the list of directories searched for" 94 " \b#include\b files. If \adirectory\a is \b-\b then: (1) \b-I\b" 95 " directories before \b-I-\b are searched only for \"...\" include" 96 " files; (2) \b-I\b directories after \b-I-\b are searched for" 97 " \"...\" and <...> include files; (3) the directory \b.\b is searched" 98 " only if it is explicitly specified by a \b-I\b option.]:?[directory]{" 99 " [+-I-C\adirectory\a, \bpp::cdir\b \adirectory\a?Mark \adirectory\a" 100 " as a C header directory. Used with \bpp:plusplus\b.]" 101 " [+-I-D[\afile\a]]?Read the default \bprobe\b(1) definitions from" 102 " \afile\a, or ignore the default definitions if \afile\a" 103 " is omitted.]" 104 " [+-I-H\adirectory\a, \bpp::hostdir\b \adirectory\a?Mark \adirectory\a" 105 " as a hosted directory. Headers from hosted directories have" 106 " compatibility warnings disabled.]" 107 " [+-I-I\aheader\a, \bpp::ignore\b \aheader\a?Add \aheader\a to the" 108 " list of ignored headers.]" 109 " [+-I-M\afile\a?\afile\a contains a sequence of \aheader\a" 110 " [= \"\amap\a\" ]] lines, where \aheader\a is either <\aname\a>" 111 " or \"\aname\a\", and \"\amap\a\" is an explicit binding" 112 " for \aheader\a. \aheader\a is ignored if = \"\amap\a\" is" 113 " omitted.]" 114 " [+-I-R\afile\a?Include \afile\a but do not emit text or line syncs.]" 115 " [+-I-S\adirectory\a?Add \adirectory\a to the default standard include" 116 " directory list.]" 117 " [+-I-T\afile\a?Include \afile\a and emit text to the output file.]" 118 "}" 119 "[M:dependencies?Generate \bmake\b(1) dependencies. Not needed with" 120 " \bnmake\b(1). \b-M\b may be followed by optional \aflags\a to change" 121 " dependency output styles:]{" 122 " [+D?Generate dependencies in a separate \b.d\b file. Preprocessed" 123 " output is still written to \aoutput\a, or the standard output" 124 " if \aoutput\a is omitted.]" 125 " [+G?Generate missing dependencies too.]" 126 " [+M?Only generate local header dependencies; \ahosted\a headers are" 127 " omitted. Note that \ahosted\a headers are determined by" 128 " \b-I-H\b and the \bpp:hosted\b and \bpp:hostdir\b pragmas;" 129 " no special distiction is made between \"\" and <> \binclude\b" 130 " styles.]" 131 "}" 132 "[P!:sync?Emit line syncs.]" 133 "[U:undefine?Remove the definition for the macro \aname\a.]:[name]" 134 135 "[A:assert?Enter the assertion via \b#assert\b for system V" 136 " compatibility.]:[assertion]" 137 "[E:preprocess?Ignored for compatibility with ancient compilers.]" 138 "[H:include-reference?Emit \b#include\b file paths on the standard error," 139 " one per line, indented to show nesting.]" 140 "[T?If not \bgcc\b(1) then truncate identifiers to \alength\a" 141 " characters for compatibility with old AT&T (I guess only Lucent needs" 142 " them now) compilers.]#?[length]" 143 "[V:version?Emit the \blibpp\b(3) version.]" 144 "[X:argmode?Enable \aname\a=\avalue\a macro arguments for \beasel\b(1)" 145 " compatibility.]" 146 "[Y:standard?Add \adirectory\a to the list searched for" 147 " \b#include\b \b<...>\b files.]:[directory]" 148 149 "\n" 150 "\n[ input [ output ] ]\n" 151 "\n" 152 153 "[+SEE ALSO?\bcc\b(1), \bgcc\b(1), \blibpp\b(3)]" 154 ; 155 156 #include "pplib.h" 157 158 #include <ctype.h> 159 160 /* 161 * convert lint comments to pragmas 162 */ 163 164 static void 165 pplint(char* head, char* comment, char* tail, int line) 166 { 167 NoP(line); 168 if (strmatch(comment, "(ARGSUSED|PRINTFLIKE|PROTOLIB|SCANFLIKE|VARARGS)*([0-9])|CONSTCOND|CONSTANTCOND|CONSTANTCONDITION|EMPTY|FALLTHRU|FALLTHROUGH|LINTLIBRARY|LINTED*|NOTREACHED")) 169 { 170 strncopy(pp.token, comment, MAXTOKEN); 171 ppprintf("\n#%s %s:%s\n", dirname(PRAGMA), pp.pass, pp.token); 172 ppline(error_info.line, NiL); 173 } 174 } 175 176 /* 177 * if last!=0 then argv[opt_info.index]==0 with return(0) 178 * else if argv[opt_info.index]==0 then return(0) 179 * otherwise argv[opt_info.index] is the first unrecognized 180 * option with return(1) 181 * 182 * use last=0 if the preprocessor is combined with other passes 183 * so that unknown options may be interpreted for those passes 184 */ 185 186 int 187 ppargs(char** argv, int last) 188 { 189 register char* s; 190 register int c; 191 register int n; 192 char* p; 193 194 /* 195 * check the args and initialize 196 */ 197 198 if (!error_info.id) 199 error_info.id = "cpp"; 200 for (;;) 201 { 202 for (; c = optget(argv, usage); last = 0) switch (c) 203 { 204 case 'C': 205 ppop(PP_COMMENT, ppcomment); 206 break; 207 case 'D': 208 /* 209 * this allows single arg pp option extensions 210 * without touching cc 211 * (not all cc wrappers have -W...) 212 */ 213 214 switch (*(s = opt_info.arg)) 215 { 216 case '-': 217 case '+': 218 n = (*s++ == '-'); 219 while (c = *s++) switch (c) 220 { 221 case 'C': 222 ppop(PP_COMPATIBILITY, n); 223 break; 224 case 'D': 225 if (n && ((c = strtol(s, &p, 0)) || p != s)) 226 { 227 s = p; 228 n = c; 229 } 230 ppop(PP_DEBUG, -n); 231 break; 232 case 'F': 233 ppop(PP_FILENAME, n ? s : NiL); 234 goto hasarg; 235 case 'H': 236 ppop(PP_HOSTDIR, "-", n); 237 break; 238 case 'I': 239 ppop(PP_CDIR, "-", n); 240 break; 241 case 'K': 242 ppop(PP_KEYARGS, n); 243 break; 244 case 'L': 245 ppop(PP_LINEID, n && *s ? s : "line"); 246 goto hasarg; 247 case 'M': 248 ppop(PP_MULTIPLE, !n); 249 break; 250 case 'P': 251 ppop(PP_PASSTHROUGH, n); 252 break; 253 case 'Q': 254 ppop(PP_DUMP, n); 255 break; 256 case 'R': 257 ppop(PP_TRANSITION, n); 258 break; 259 case 'S': 260 ppop(PP_STRICT, n); 261 break; 262 case 'T': 263 ppop(PP_TEST, s); 264 goto hasarg; 265 case 'V': 266 ppop(PP_VENDOR, "-", n); 267 break; 268 case 'W': 269 ppop(PP_WARN, n); 270 break; 271 case 'X': 272 ppop(PP_PROBE, n && *s ? s : 0); 273 goto hasarg; 274 case 'Z': 275 ppop(PP_POOL, n); 276 break; 277 case 'd': 278 pp.option |= DEFINITIONS; 279 break; 280 case 'm': 281 pp.state |= NOTEXT; 282 pp.option |= KEEPNOTEXT|DEFINITIONS|PREDEFINITIONS; 283 pp.linesync = 0; 284 break; 285 case '+': 286 ppop(PP_PLUSPLUS, n); 287 break; 288 default: 289 if (pp.optarg) 290 { 291 if ((c = (*pp.optarg)(n, c, s)) > 0) goto hasarg; 292 else if (!c) break; 293 } 294 error(1, "%c%s: unknown -D option overload", n ? '-' : '+', s - 1); 295 goto hasarg; 296 } 297 hasarg: 298 break; 299 case ':': 300 ppop(PP_OPTION, s + 1); 301 break; 302 case '%': 303 ppop(PP_DIRECTIVE, s + 1); 304 break; 305 case '_': 306 if (strmatch(s, "__GNUC__*")) 307 pp.arg_style |= STYLE_gnu; 308 else if (strmatch(s, "__(ANSI|STDC|STRICT)__*") || !(pp.arg_style & STYLE_gnu) && strmatch(s, "__STRICT_ANSI__*")) 309 ppop(PP_STRICT, 1); 310 else if (strmatch(s, "__cplusplus*")) 311 ppop(PP_PLUSPLUS, 1); 312 /*FALLTHROUGH*/ 313 default: 314 ppop(PP_DEFINE, s); 315 break; 316 } 317 break; 318 case 'E': 319 /* historically ignored */ 320 break; 321 case 'I': 322 if (!(s = opt_info.arg)) 323 { 324 /* 325 * some compilers interpret `-I ...' as 326 * `-I-S' and arg ... while others interpret 327 * it as `-I...' 328 */ 329 330 p = "-S"; 331 if ((s = argv[opt_info.index]) && ((n = *s++) == '-' || n == '+') && *s++ == 'D') 332 { 333 if (isalpha(*s) || *s == '_') 334 while (isalnum(*++s) || *s == '_'); 335 if (*s && *s != '=' && *s != '-' && *s != '+') 336 p = argv[opt_info.index++]; 337 } 338 s = p; 339 } 340 switch (*s) 341 { 342 case '-': 343 case '+': 344 n = *(p = s++) == '-'; 345 c = *s++; 346 if (!n && !*s) s = 0; 347 switch (c) 348 { 349 case 0: 350 ppop(PP_LOCAL); 351 break; 352 case 'C': 353 ppop(PP_CDIR, s, n); 354 break; 355 case 'D': 356 ppop(PP_DEFAULT, s); 357 break; 358 case 'H': 359 ppop(PP_HOSTDIR, s, n); 360 break; 361 case 'I': 362 ppop(PP_IGNORE, s); 363 break; 364 case 'M': 365 ppop(PP_IGNORELIST, s); 366 break; 367 case 'R': 368 ppop(PP_READ, s); 369 break; 370 case 'S': 371 ppop(PP_STANDARD, s); 372 break; 373 case 'T': 374 ppop(PP_TEXT, s); 375 break; 376 case 'V': 377 ppop(PP_VENDOR, s, n); 378 break; 379 default: 380 error(1, "%s: unknown -I option overload", p); 381 break; 382 } 383 break; 384 default: 385 ppop(PP_INCLUDE, s); 386 break; 387 } 388 break; 389 case 'M': 390 for (n = PP_deps; argv[opt_info.index]; opt_info.offset++) 391 { 392 switch (argv[opt_info.index][opt_info.offset]) 393 { 394 case 'D': 395 n |= PP_deps_file; 396 continue; 397 case 'G': 398 n |= PP_deps_generated; 399 continue; 400 case 'M': 401 n |= PP_deps_local; 402 continue; 403 } 404 break; 405 } 406 ppop(PP_FILEDEPS, n); 407 break; 408 case 'P': 409 ppop(PP_LINE, (PPLINESYNC)0); 410 break; 411 case 'U': 412 ppop(PP_UNDEF, opt_info.arg); 413 break; 414 415 /* 416 * System V CCS compatibility 417 */ 418 419 case 'A': 420 if (isalpha(opt_info.arg[0]) || opt_info.arg[0] == '_' || opt_info.arg[0] == '$') 421 ppop(PP_ASSERT, opt_info.arg); 422 break; 423 case 'H': 424 ppop(PP_INCREF, ppincref); 425 break; 426 case 'T': 427 if (!(pp.arg_style & STYLE_gnu)) 428 ppop(PP_TRUNCATE, TRUNCLENGTH); 429 /* else enable ANSI trigraphs -- default */ 430 break; 431 case 'V': 432 error(0, "%s", pp.version); 433 break; 434 case 'X': 435 pp.arg_mode = (*(opt_info.arg + 1) || pp.arg_mode && pp.arg_mode != *opt_info.arg) ? '-' : *opt_info.arg; 436 break; 437 case 'Y': 438 if (*(s = opt_info.arg) && *(s + 1) == ',') 439 { 440 if (*s != 'I') break; 441 s += 2; 442 } 443 ppop(PP_STANDARD, s); 444 break; 445 446 /* 447 * errors 448 */ 449 450 case '?': 451 error(ERROR_USAGE|4, "%s", opt_info.arg); 452 break; 453 case ':': 454 if (!last) 455 { 456 opt_info.again = 1; 457 return(1); 458 } 459 460 /* 461 * cross your fingers 462 */ 463 464 if (!(s = argv[opt_info.index])) 465 error(3, "%s", opt_info.arg); 466 if (opt_info.offset == 2 && (pp.arg_style & STYLE_gnu)) 467 { 468 p = argv[opt_info.index + 1]; 469 if (streq(s, "-$")) 470 { 471 ppop(PP_OPTION, "noid \"$\""); 472 goto ignore; 473 } 474 else if (streq(s, "-dD")) 475 { 476 pp.option |= DEFINITIONS; 477 goto ignore; 478 } 479 else if (streq(s, "-dM")) 480 { 481 pp.state |= NOTEXT; 482 pp.option |= KEEPNOTEXT|DEFINITIONS|PREDEFINITIONS; 483 pp.linesync = 0; 484 goto ignore; 485 } 486 else if (streq(s, "-imacros")) 487 { 488 if (p) 489 { 490 ppop(PP_READ, p); 491 opt_info.index++; 492 opt_info.offset = 0; 493 } 494 goto ignore; 495 } 496 else if (streq(s, "-include")) 497 { 498 if (p) 499 { 500 ppop(PP_TEXT, p); 501 opt_info.index++; 502 opt_info.offset = 0; 503 } 504 opt_info.offset = 0; 505 goto ignore; 506 } 507 else if (strneq(s, "-lang-", 6)) 508 { 509 s += 6; 510 if (streq(s, "c")) 511 c = 0; 512 else if (streq(s, "c++")) 513 c = 1; 514 else if (streq(s, "objc")) 515 c = 2; 516 else if (streq(s, "objc++")) 517 c = 3; 518 ppop(PP_PLUSPLUS, c & 1); 519 if (c & 2) 520 ppop(PP_DIRECTIVE, "pragma pp:map \"/#(pragma )?import>/\" \"/#(pragma )?import(.*)/__STDPP__IMPORT__(\\2)/\"\n\ 521 #macdef __STDPP__IMPORT__(x)\n\ 522 #pragma pp:noallmultiple\n\ 523 #include x\n\ 524 #pragma pp:allmultiple\n\ 525 #endmac"); 526 goto ignore; 527 } 528 else if (streq(s, "-lint")) 529 { 530 ppop(PP_COMMENT, pplint); 531 goto ignore; 532 } 533 } 534 s += opt_info.offset - 1; 535 if (strmatch(s, "i*.h")) 536 ppop((pp.arg_style & STYLE_gnu) || s[1] == '/' ? PP_READ : PP_TEXT, s + 1); 537 else if (strmatch(s, "*@(nostandard|nostdinc)*")) 538 ppop(PP_STANDARD, ""); 539 else if (strmatch(s, "*@(exten|xansi)*|std")) 540 { 541 ppop(PP_COMPATIBILITY, 0); 542 ppop(PP_TRANSITION, 1); 543 } 544 else if (strmatch(s, "*@(ansi|conform|pedantic|stand|std1|strict[!-])*")) 545 { 546 ppop(PP_COMPATIBILITY, 0); 547 ppop(PP_STRICT, 1); 548 if (strmatch(s, "*pedantic*")) 549 ppop(PP_PEDANTIC, 1); 550 } 551 else if (strmatch(s, "*@(trans)*")) 552 { 553 ppop(PP_COMPATIBILITY, 1); 554 ppop(PP_TRANSITION, 1); 555 } 556 else if (strmatch(s, "*@(classic|compat|std0|tradition|[kK][n&+][rR])*")) 557 { 558 ppop(PP_COMPATIBILITY, 1); 559 ppop(PP_TRANSITION, 0); 560 } 561 else if (strmatch(s, "*@(plusplus|++)*")) 562 ppop(PP_PLUSPLUS, 1); 563 else if (strmatch(s, "*@(warn)*")) 564 ppop(PP_WARN, 1); 565 566 /* 567 * ignore unknown options 568 * the probe info takes care of these 569 * fails if an option value is in the next arg 570 * and this is the last option 571 */ 572 573 if (argv[opt_info.index + 1] && argv[opt_info.index + 1][0] != '-' && argv[opt_info.index + 2] && argv[opt_info.index + 2][0] == '-') 574 { 575 opt_info.index++; 576 opt_info.offset = 0; 577 } 578 ignore: 579 while (argv[opt_info.index][opt_info.offset]) opt_info.offset++; 580 break; 581 } 582 if (!(s = argv[opt_info.index])) return(0); 583 switch (pp.arg_file) 584 { 585 case 0: 586 if (*s != '-' || *(s + 1)) ppop(PP_INPUT, s); 587 break; 588 case 1: 589 if (*s != '-' || *(s + 1)) ppop(PP_OUTPUT, s); 590 break; 591 default: 592 if (!last) return(1); 593 error(1, "%s: extraneous argument ignored", s); 594 break; 595 } 596 pp.arg_file++; 597 if (!argv[++opt_info.index]) return(0); 598 599 /* 600 * old versions allow options after file args 601 */ 602 } 603 } 604