The Android Open Source Project | 10e23ee | 2009-03-03 19:30:30 -0800 | [diff] [blame] | 1 | /* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 4 -*- */ |
| 2 | |
| 3 | /** \ingroup popt |
| 4 | * \file popt/popthelp.c |
| 5 | */ |
| 6 | |
| 7 | /* (C) 1998-2002 Red Hat, Inc. -- Licensing details are in the COPYING |
| 8 | file accompanying popt source distributions, available from |
| 9 | ftp://ftp.rpm.org/pub/rpm/dist. */ |
| 10 | |
| 11 | #include "system.h" |
| 12 | |
| 13 | //#define POPT_WCHAR_HACK |
| 14 | #ifdef POPT_WCHAR_HACK |
| 15 | #include <wchar.h> /* for mbsrtowcs */ |
| 16 | /*@access mbstate_t @*/ |
| 17 | #endif |
| 18 | #include "poptint.h" |
| 19 | |
| 20 | /*@access poptContext@*/ |
| 21 | |
| 22 | /** |
| 23 | * Display arguments. |
| 24 | * @param con context |
| 25 | * @param foo (unused) |
| 26 | * @param key option(s) |
| 27 | * @param arg (unused) |
| 28 | * @param data (unused) |
| 29 | */ |
| 30 | static void displayArgs(poptContext con, |
| 31 | /*@unused@*/ enum poptCallbackReason foo, |
| 32 | struct poptOption * key, |
| 33 | /*@unused@*/ const char * arg, /*@unused@*/ void * data) |
| 34 | /*@globals fileSystem@*/ |
| 35 | /*@modifies fileSystem@*/ |
| 36 | { |
| 37 | if (key->shortName == '?') |
| 38 | poptPrintHelp(con, stdout, 0); |
| 39 | else |
| 40 | poptPrintUsage(con, stdout, 0); |
| 41 | exit(0); |
| 42 | } |
| 43 | |
| 44 | #ifdef NOTYET |
| 45 | /*@unchecked@*/ |
| 46 | static int show_option_defaults = 0; |
| 47 | #endif |
| 48 | |
| 49 | /** |
| 50 | * Empty table marker to enable displaying popt alias/exec options. |
| 51 | */ |
| 52 | /*@observer@*/ /*@unchecked@*/ |
| 53 | struct poptOption poptAliasOptions[] = { |
| 54 | POPT_TABLEEND |
| 55 | }; |
| 56 | |
| 57 | /** |
| 58 | * Auto help table options. |
| 59 | */ |
| 60 | /*@-castfcnptr@*/ |
| 61 | /*@observer@*/ /*@unchecked@*/ |
| 62 | struct poptOption poptHelpOptions[] = { |
| 63 | { NULL, '\0', POPT_ARG_CALLBACK, (void *)&displayArgs, '\0', NULL, NULL }, |
| 64 | { "help", '?', 0, NULL, '?', N_("Show this help message"), NULL }, |
| 65 | { "usage", '\0', 0, NULL, 'u', N_("Display brief usage message"), NULL }, |
| 66 | POPT_TABLEEND |
| 67 | } ; |
| 68 | |
| 69 | /*@observer@*/ /*@unchecked@*/ |
| 70 | static struct poptOption poptHelpOptions2[] = { |
| 71 | /*@-readonlytrans@*/ |
| 72 | { NULL, '\0', POPT_ARG_INTL_DOMAIN, PACKAGE, 0, NULL, NULL}, |
| 73 | /*@=readonlytrans@*/ |
| 74 | { NULL, '\0', POPT_ARG_CALLBACK, (void *)&displayArgs, '\0', NULL, NULL }, |
| 75 | { "help", '?', 0, NULL, '?', N_("Show this help message"), NULL }, |
| 76 | { "usage", '\0', 0, NULL, 'u', N_("Display brief usage message"), NULL }, |
| 77 | #ifdef NOTYET |
| 78 | { "defaults", '\0', POPT_ARG_NONE, &show_option_defaults, 0, |
| 79 | N_("Display option defaults in message"), NULL }, |
| 80 | #endif |
| 81 | POPT_TABLEEND |
| 82 | } ; |
| 83 | |
| 84 | /*@observer@*/ /*@unchecked@*/ |
| 85 | struct poptOption * poptHelpOptionsI18N = poptHelpOptions2; |
| 86 | /*@=castfcnptr@*/ |
| 87 | |
| 88 | /** |
| 89 | * @param table option(s) |
| 90 | */ |
| 91 | /*@observer@*/ /*@null@*/ static const char * |
| 92 | getTableTranslationDomain(/*@null@*/ const struct poptOption *table) |
| 93 | /*@*/ |
| 94 | { |
| 95 | const struct poptOption *opt; |
| 96 | |
| 97 | if (table != NULL) |
| 98 | for (opt = table; opt->longName || opt->shortName || opt->arg; opt++) { |
| 99 | if (opt->argInfo == POPT_ARG_INTL_DOMAIN) |
| 100 | return opt->arg; |
| 101 | } |
| 102 | return NULL; |
| 103 | } |
| 104 | |
| 105 | /** |
| 106 | * @param opt option(s) |
| 107 | * @param translation_domain translation domain |
| 108 | */ |
| 109 | /*@observer@*/ /*@null@*/ static const char * |
| 110 | getArgDescrip(const struct poptOption * opt, |
| 111 | /*@-paramuse@*/ /* FIX: i18n macros disabled with lclint */ |
| 112 | /*@null@*/ const char * translation_domain) |
| 113 | /*@=paramuse@*/ |
| 114 | /*@*/ |
| 115 | { |
| 116 | if (!(opt->argInfo & POPT_ARG_MASK)) return NULL; |
| 117 | |
| 118 | if (opt == (poptHelpOptions + 1) || opt == (poptHelpOptions + 2)) |
| 119 | if (opt->argDescrip) return POPT_(opt->argDescrip); |
| 120 | |
| 121 | if (opt->argDescrip) return D_(translation_domain, opt->argDescrip); |
| 122 | |
| 123 | switch (opt->argInfo & POPT_ARG_MASK) { |
| 124 | case POPT_ARG_NONE: return POPT_("NONE"); |
| 125 | #ifdef DYING |
| 126 | case POPT_ARG_VAL: return POPT_("VAL"); |
| 127 | #else |
| 128 | case POPT_ARG_VAL: return NULL; |
| 129 | #endif |
| 130 | case POPT_ARG_INT: return POPT_("INT"); |
| 131 | case POPT_ARG_LONG: return POPT_("LONG"); |
| 132 | case POPT_ARG_STRING: return POPT_("STRING"); |
| 133 | case POPT_ARG_FLOAT: return POPT_("FLOAT"); |
| 134 | case POPT_ARG_DOUBLE: return POPT_("DOUBLE"); |
| 135 | default: return POPT_("ARG"); |
| 136 | } |
| 137 | } |
| 138 | |
| 139 | /** |
| 140 | * Display default value for an option. |
| 141 | * @param lineLength display positions remaining |
| 142 | * @param opt option(s) |
| 143 | * @param translation_domain translation domain |
| 144 | * @return |
| 145 | */ |
| 146 | static /*@only@*/ /*@null@*/ char * |
| 147 | singleOptionDefaultValue(size_t lineLength, |
| 148 | const struct poptOption * opt, |
| 149 | /*@-paramuse@*/ /* FIX: i18n macros disabled with lclint */ |
| 150 | /*@null@*/ const char * translation_domain) |
| 151 | /*@=paramuse@*/ |
| 152 | /*@*/ |
| 153 | { |
| 154 | const char * defstr = D_(translation_domain, "default"); |
| 155 | char * le = malloc(4*lineLength + 1); |
| 156 | char * l = le; |
| 157 | |
| 158 | if (le == NULL) return NULL; /* XXX can't happen */ |
| 159 | /*@-boundswrite@*/ |
| 160 | *le = '\0'; |
| 161 | *le++ = '('; |
| 162 | strcpy(le, defstr); le += strlen(le); |
| 163 | *le++ = ':'; |
| 164 | *le++ = ' '; |
| 165 | if (opt->arg) /* XXX programmer error */ |
| 166 | switch (opt->argInfo & POPT_ARG_MASK) { |
| 167 | case POPT_ARG_VAL: |
| 168 | case POPT_ARG_INT: |
| 169 | { long aLong = *((int *)opt->arg); |
| 170 | le += sprintf(le, "%ld", aLong); |
| 171 | } break; |
| 172 | case POPT_ARG_LONG: |
| 173 | { long aLong = *((long *)opt->arg); |
| 174 | le += sprintf(le, "%ld", aLong); |
| 175 | } break; |
| 176 | case POPT_ARG_FLOAT: |
| 177 | { double aDouble = *((float *)opt->arg); |
| 178 | le += sprintf(le, "%g", aDouble); |
| 179 | } break; |
| 180 | case POPT_ARG_DOUBLE: |
| 181 | { double aDouble = *((double *)opt->arg); |
| 182 | le += sprintf(le, "%g", aDouble); |
| 183 | } break; |
| 184 | case POPT_ARG_STRING: |
| 185 | { const char * s = *(const char **)opt->arg; |
| 186 | if (s == NULL) { |
| 187 | strcpy(le, "null"); le += strlen(le); |
| 188 | } else { |
| 189 | size_t slen = 4*lineLength - (le - l) - sizeof("\"...\")"); |
| 190 | *le++ = '"'; |
| 191 | strncpy(le, s, slen); le[slen] = '\0'; le += strlen(le); |
| 192 | if (slen < strlen(s)) { |
| 193 | strcpy(le, "..."); le += strlen(le); |
| 194 | } |
| 195 | *le++ = '"'; |
| 196 | } |
| 197 | } break; |
| 198 | case POPT_ARG_NONE: |
| 199 | default: |
| 200 | l = _free(l); |
| 201 | return NULL; |
| 202 | /*@notreached@*/ break; |
| 203 | } |
| 204 | *le++ = ')'; |
| 205 | *le = '\0'; |
| 206 | /*@=boundswrite@*/ |
| 207 | |
| 208 | return l; |
| 209 | } |
| 210 | |
| 211 | /** |
| 212 | * Display help text for an option. |
| 213 | * @param fp output file handle |
| 214 | * @param maxLeftCol largest argument display width |
| 215 | * @param opt option(s) |
| 216 | * @param translation_domain translation domain |
| 217 | */ |
| 218 | static void singleOptionHelp(FILE * fp, size_t maxLeftCol, |
| 219 | const struct poptOption * opt, |
| 220 | /*@null@*/ const char * translation_domain) |
| 221 | /*@globals fileSystem @*/ |
| 222 | /*@modifies *fp, fileSystem @*/ |
| 223 | { |
| 224 | size_t indentLength = maxLeftCol + 5; |
| 225 | size_t lineLength = 79 - indentLength; |
| 226 | const char * help = D_(translation_domain, opt->descrip); |
| 227 | const char * argDescrip = getArgDescrip(opt, translation_domain); |
| 228 | size_t helpLength; |
| 229 | char * defs = NULL; |
| 230 | char * left; |
| 231 | size_t nb = maxLeftCol + 1; |
| 232 | int displaypad = 0; |
| 233 | |
| 234 | /* Make sure there's more than enough room in target buffer. */ |
| 235 | if (opt->longName) nb += strlen(opt->longName); |
| 236 | if (argDescrip) nb += strlen(argDescrip); |
| 237 | |
| 238 | /*@-boundswrite@*/ |
| 239 | left = malloc(nb); |
| 240 | if (left == NULL) return; /* XXX can't happen */ |
| 241 | left[0] = '\0'; |
| 242 | left[maxLeftCol] = '\0'; |
| 243 | |
| 244 | if (opt->longName && opt->shortName) |
| 245 | sprintf(left, "-%c, %s%s", opt->shortName, |
| 246 | ((opt->argInfo & POPT_ARGFLAG_ONEDASH) ? "-" : "--"), |
| 247 | opt->longName); |
| 248 | else if (opt->shortName != '\0') |
| 249 | sprintf(left, "-%c", opt->shortName); |
| 250 | else if (opt->longName) |
| 251 | sprintf(left, "%s%s", |
| 252 | ((opt->argInfo & POPT_ARGFLAG_ONEDASH) ? "-" : "--"), |
| 253 | opt->longName); |
| 254 | if (!*left) goto out; |
| 255 | |
| 256 | if (argDescrip) { |
| 257 | char * le = left + strlen(left); |
| 258 | |
| 259 | if (opt->argInfo & POPT_ARGFLAG_OPTIONAL) |
| 260 | *le++ = '['; |
| 261 | |
| 262 | /* Choose type of output */ |
| 263 | /*@-branchstate@*/ |
| 264 | if (opt->argInfo & POPT_ARGFLAG_SHOW_DEFAULT) { |
| 265 | defs = singleOptionDefaultValue(lineLength, opt, translation_domain); |
| 266 | if (defs) { |
| 267 | char * t = malloc((help ? strlen(help) : 0) + |
| 268 | strlen(defs) + sizeof(" ")); |
| 269 | if (t) { |
| 270 | char * te = t; |
| 271 | *te = '\0'; |
| 272 | if (help) { |
| 273 | strcpy(te, help); te += strlen(te); |
| 274 | } |
| 275 | *te++ = ' '; |
| 276 | strcpy(te, defs); |
| 277 | defs = _free(defs); |
| 278 | } |
| 279 | defs = t; |
| 280 | } |
| 281 | } |
| 282 | /*@=branchstate@*/ |
| 283 | |
| 284 | if (opt->argDescrip == NULL) { |
| 285 | switch (opt->argInfo & POPT_ARG_MASK) { |
| 286 | case POPT_ARG_NONE: |
| 287 | break; |
| 288 | case POPT_ARG_VAL: |
| 289 | #ifdef NOTNOW /* XXX pug ugly nerdy output */ |
| 290 | { long aLong = opt->val; |
| 291 | int ops = (opt->argInfo & POPT_ARGFLAG_LOGICALOPS); |
| 292 | int negate = (opt->argInfo & POPT_ARGFLAG_NOT); |
| 293 | |
| 294 | /* Don't bother displaying typical values */ |
| 295 | if (!ops && (aLong == 0L || aLong == 1L || aLong == -1L)) |
| 296 | break; |
| 297 | *le++ = '['; |
| 298 | switch (ops) { |
| 299 | case POPT_ARGFLAG_OR: |
| 300 | *le++ = '|'; |
| 301 | /*@innerbreak@*/ break; |
| 302 | case POPT_ARGFLAG_AND: |
| 303 | *le++ = '&'; |
| 304 | /*@innerbreak@*/ break; |
| 305 | case POPT_ARGFLAG_XOR: |
| 306 | *le++ = '^'; |
| 307 | /*@innerbreak@*/ break; |
| 308 | default: |
| 309 | /*@innerbreak@*/ break; |
| 310 | } |
| 311 | *le++ = (opt->longName != NULL ? '=' : ' '); |
| 312 | if (negate) *le++ = '~'; |
| 313 | /*@-formatconst@*/ |
| 314 | le += sprintf(le, (ops ? "0x%lx" : "%ld"), aLong); |
| 315 | /*@=formatconst@*/ |
| 316 | *le++ = ']'; |
| 317 | } |
| 318 | #endif |
| 319 | break; |
| 320 | case POPT_ARG_INT: |
| 321 | case POPT_ARG_LONG: |
| 322 | case POPT_ARG_FLOAT: |
| 323 | case POPT_ARG_DOUBLE: |
| 324 | case POPT_ARG_STRING: |
| 325 | *le++ = (opt->longName != NULL ? '=' : ' '); |
| 326 | strcpy(le, argDescrip); le += strlen(le); |
| 327 | break; |
| 328 | default: |
| 329 | break; |
| 330 | } |
| 331 | } else { |
| 332 | size_t lelen; |
| 333 | |
| 334 | *le++ = '='; |
| 335 | strcpy(le, argDescrip); |
| 336 | lelen = strlen(le); |
| 337 | le += lelen; |
| 338 | |
| 339 | #ifdef POPT_WCHAR_HACK |
| 340 | { const char * scopy = argDescrip; |
| 341 | mbstate_t t; |
| 342 | size_t n; |
| 343 | |
| 344 | memset ((void *)&t, '\0', sizeof (t)); /* In initial state. */ |
| 345 | /* Determine number of characters. */ |
| 346 | n = mbsrtowcs (NULL, &scopy, strlen(scopy), &t); |
| 347 | |
| 348 | displaypad = (int) (lelen-n); |
| 349 | } |
| 350 | #endif |
| 351 | } |
| 352 | if (opt->argInfo & POPT_ARGFLAG_OPTIONAL) |
| 353 | *le++ = ']'; |
| 354 | *le = '\0'; |
| 355 | } |
| 356 | /*@=boundswrite@*/ |
| 357 | |
| 358 | if (help) |
| 359 | fprintf(fp," %-*s ", maxLeftCol+displaypad, left); |
| 360 | else { |
| 361 | fprintf(fp," %s\n", left); |
| 362 | goto out; |
| 363 | } |
| 364 | |
| 365 | left = _free(left); |
| 366 | /*@-branchstate@*/ |
| 367 | if (defs) { |
| 368 | help = defs; |
| 369 | defs = NULL; |
| 370 | } |
| 371 | /*@=branchstate@*/ |
| 372 | |
| 373 | helpLength = strlen(help); |
| 374 | /*@-boundsread@*/ |
| 375 | while (helpLength > lineLength) { |
| 376 | const char * ch; |
| 377 | char format[16]; |
| 378 | |
| 379 | ch = help + lineLength - 1; |
| 380 | while (ch > help && !isspace(*ch)) ch--; |
| 381 | if (ch == help) break; /* give up */ |
| 382 | while (ch > (help + 1) && isspace(*ch)) ch--; |
| 383 | ch++; |
| 384 | |
| 385 | sprintf(format, "%%.%ds\n%%%ds", (int) (ch - help), (int) indentLength); |
| 386 | /*@-formatconst@*/ |
| 387 | fprintf(fp, format, help, " "); |
| 388 | /*@=formatconst@*/ |
| 389 | help = ch; |
| 390 | while (isspace(*help) && *help) help++; |
| 391 | helpLength = strlen(help); |
| 392 | } |
| 393 | /*@=boundsread@*/ |
| 394 | |
| 395 | if (helpLength) fprintf(fp, "%s\n", help); |
| 396 | |
| 397 | out: |
| 398 | /*@-dependenttrans@*/ |
| 399 | defs = _free(defs); |
| 400 | /*@=dependenttrans@*/ |
| 401 | left = _free(left); |
| 402 | } |
| 403 | |
| 404 | /** |
| 405 | * Find display width for longest argument string. |
| 406 | * @param opt option(s) |
| 407 | * @param translation_domain translation domain |
| 408 | * @return display width |
| 409 | */ |
| 410 | static size_t maxArgWidth(const struct poptOption * opt, |
| 411 | /*@null@*/ const char * translation_domain) |
| 412 | /*@*/ |
| 413 | { |
| 414 | size_t max = 0; |
| 415 | size_t len = 0; |
| 416 | const char * s; |
| 417 | |
| 418 | if (opt != NULL) |
| 419 | while (opt->longName || opt->shortName || opt->arg) { |
| 420 | if ((opt->argInfo & POPT_ARG_MASK) == POPT_ARG_INCLUDE_TABLE) { |
| 421 | if (opt->arg) /* XXX program error */ |
| 422 | len = maxArgWidth(opt->arg, translation_domain); |
| 423 | if (len > max) max = len; |
| 424 | } else if (!(opt->argInfo & POPT_ARGFLAG_DOC_HIDDEN)) { |
| 425 | len = sizeof(" ")-1; |
| 426 | if (opt->shortName != '\0') len += sizeof("-X")-1; |
| 427 | if (opt->shortName != '\0' && opt->longName) len += sizeof(", ")-1; |
| 428 | if (opt->longName) { |
| 429 | len += ((opt->argInfo & POPT_ARGFLAG_ONEDASH) |
| 430 | ? sizeof("-")-1 : sizeof("--")-1); |
| 431 | len += strlen(opt->longName); |
| 432 | } |
| 433 | |
| 434 | s = getArgDescrip(opt, translation_domain); |
| 435 | |
| 436 | #ifdef POPT_WCHAR_HACK |
| 437 | /* XXX Calculate no. of display characters. */ |
| 438 | if (s) { |
| 439 | const char * scopy = s; |
| 440 | mbstate_t t; |
| 441 | size_t n; |
| 442 | |
| 443 | /*@-boundswrite@*/ |
| 444 | memset ((void *)&t, '\0', sizeof (t)); /* In initial state. */ |
| 445 | /*@=boundswrite@*/ |
| 446 | /* Determine number of characters. */ |
| 447 | n = mbsrtowcs (NULL, &scopy, strlen(scopy), &t); |
| 448 | len += sizeof("=")-1 + n; |
| 449 | } |
| 450 | #else |
| 451 | if (s) |
| 452 | len += sizeof("=")-1 + strlen(s); |
| 453 | #endif |
| 454 | |
| 455 | if (opt->argInfo & POPT_ARGFLAG_OPTIONAL) len += sizeof("[]")-1; |
| 456 | if (len > max) max = len; |
| 457 | } |
| 458 | |
| 459 | opt++; |
| 460 | } |
| 461 | |
| 462 | return max; |
| 463 | } |
| 464 | |
| 465 | /** |
| 466 | * Display popt alias and exec help. |
| 467 | * @param fp output file handle |
| 468 | * @param items alias/exec array |
| 469 | * @param nitems no. of alias/exec entries |
| 470 | * @param left largest argument display width |
| 471 | * @param translation_domain translation domain |
| 472 | */ |
| 473 | static void itemHelp(FILE * fp, |
| 474 | /*@null@*/ poptItem items, int nitems, size_t left, |
| 475 | /*@null@*/ const char * translation_domain) |
| 476 | /*@globals fileSystem @*/ |
| 477 | /*@modifies *fp, fileSystem @*/ |
| 478 | { |
| 479 | poptItem item; |
| 480 | int i; |
| 481 | |
| 482 | if (items != NULL) |
| 483 | for (i = 0, item = items; i < nitems; i++, item++) { |
| 484 | const struct poptOption * opt; |
| 485 | opt = &item->option; |
| 486 | if ((opt->longName || opt->shortName) && |
| 487 | !(opt->argInfo & POPT_ARGFLAG_DOC_HIDDEN)) |
| 488 | singleOptionHelp(fp, left, opt, translation_domain); |
| 489 | } |
| 490 | } |
| 491 | |
| 492 | /** |
| 493 | * Display help text for a table of options. |
| 494 | * @param con context |
| 495 | * @param fp output file handle |
| 496 | * @param table option(s) |
| 497 | * @param left largest argument display width |
| 498 | * @param translation_domain translation domain |
| 499 | */ |
| 500 | static void singleTableHelp(poptContext con, FILE * fp, |
| 501 | /*@null@*/ const struct poptOption * table, size_t left, |
| 502 | /*@null@*/ const char * translation_domain) |
| 503 | /*@globals fileSystem @*/ |
| 504 | /*@modifies *fp, fileSystem @*/ |
| 505 | { |
| 506 | const struct poptOption * opt; |
| 507 | const char *sub_transdom; |
| 508 | |
| 509 | if (table == poptAliasOptions) { |
| 510 | itemHelp(fp, con->aliases, con->numAliases, left, NULL); |
| 511 | itemHelp(fp, con->execs, con->numExecs, left, NULL); |
| 512 | return; |
| 513 | } |
| 514 | |
| 515 | if (table != NULL) |
| 516 | for (opt = table; (opt->longName || opt->shortName || opt->arg); opt++) { |
| 517 | if ((opt->longName || opt->shortName) && |
| 518 | !(opt->argInfo & POPT_ARGFLAG_DOC_HIDDEN)) |
| 519 | singleOptionHelp(fp, left, opt, translation_domain); |
| 520 | } |
| 521 | |
| 522 | if (table != NULL) |
| 523 | for (opt = table; (opt->longName || opt->shortName || opt->arg); opt++) { |
| 524 | if ((opt->argInfo & POPT_ARG_MASK) != POPT_ARG_INCLUDE_TABLE) |
| 525 | continue; |
| 526 | sub_transdom = getTableTranslationDomain(opt->arg); |
| 527 | if (sub_transdom == NULL) |
| 528 | sub_transdom = translation_domain; |
| 529 | |
| 530 | if (opt->descrip) |
| 531 | fprintf(fp, "\n%s\n", D_(sub_transdom, opt->descrip)); |
| 532 | |
| 533 | singleTableHelp(con, fp, opt->arg, left, sub_transdom); |
| 534 | } |
| 535 | } |
| 536 | |
| 537 | /** |
| 538 | * @param con context |
| 539 | * @param fp output file handle |
| 540 | */ |
| 541 | static int showHelpIntro(poptContext con, FILE * fp) |
| 542 | /*@globals fileSystem @*/ |
| 543 | /*@modifies *fp, fileSystem @*/ |
| 544 | { |
| 545 | int len = 6; |
| 546 | const char * fn; |
| 547 | |
| 548 | fprintf(fp, POPT_("Usage:")); |
| 549 | if (!(con->flags & POPT_CONTEXT_KEEP_FIRST)) { |
| 550 | /*@-boundsread@*/ |
| 551 | /*@-nullderef -type@*/ /* LCL: wazzup? */ |
| 552 | fn = con->optionStack->argv[0]; |
| 553 | /*@=nullderef =type@*/ |
| 554 | /*@=boundsread@*/ |
| 555 | if (fn == NULL) return len; |
| 556 | if (strchr(fn, '/')) fn = strrchr(fn, '/') + 1; |
| 557 | fprintf(fp, " %s", fn); |
| 558 | len += strlen(fn) + 1; |
| 559 | } |
| 560 | |
| 561 | return len; |
| 562 | } |
| 563 | |
| 564 | void poptPrintHelp(poptContext con, FILE * fp, /*@unused@*/ int flags) |
| 565 | { |
| 566 | size_t leftColWidth; |
| 567 | |
| 568 | (void) showHelpIntro(con, fp); |
| 569 | if (con->otherHelp) |
| 570 | fprintf(fp, " %s\n", con->otherHelp); |
| 571 | else |
| 572 | fprintf(fp, " %s\n", POPT_("[OPTION...]")); |
| 573 | |
| 574 | leftColWidth = maxArgWidth(con->options, NULL); |
| 575 | singleTableHelp(con, fp, con->options, leftColWidth, NULL); |
| 576 | } |
| 577 | |
| 578 | /** |
| 579 | * Display usage text for an option. |
| 580 | * @param fp output file handle |
| 581 | * @param cursor current display position |
| 582 | * @param opt option(s) |
| 583 | * @param translation_domain translation domain |
| 584 | */ |
| 585 | static size_t singleOptionUsage(FILE * fp, size_t cursor, |
| 586 | const struct poptOption * opt, |
| 587 | /*@null@*/ const char *translation_domain) |
| 588 | /*@globals fileSystem @*/ |
| 589 | /*@modifies *fp, fileSystem @*/ |
| 590 | { |
| 591 | size_t len = 4; |
| 592 | char shortStr[2] = { '\0', '\0' }; |
| 593 | const char * item = shortStr; |
| 594 | const char * argDescrip = getArgDescrip(opt, translation_domain); |
| 595 | |
| 596 | if (opt->shortName != '\0' && opt->longName != NULL) { |
| 597 | len += 2; |
| 598 | if (!(opt->argInfo & POPT_ARGFLAG_ONEDASH)) len++; |
| 599 | len += strlen(opt->longName); |
| 600 | } else if (opt->shortName != '\0') { |
| 601 | len++; |
| 602 | shortStr[0] = opt->shortName; |
| 603 | shortStr[1] = '\0'; |
| 604 | } else if (opt->longName) { |
| 605 | len += strlen(opt->longName); |
| 606 | if (!(opt->argInfo & POPT_ARGFLAG_ONEDASH)) len++; |
| 607 | item = opt->longName; |
| 608 | } |
| 609 | |
| 610 | if (len == 4) return cursor; |
| 611 | |
| 612 | #ifdef POPT_WCHAR_HACK |
| 613 | /* XXX Calculate no. of display characters. */ |
| 614 | if (argDescrip) { |
| 615 | const char * scopy = argDescrip; |
| 616 | mbstate_t t; |
| 617 | size_t n; |
| 618 | |
| 619 | /*@-boundswrite@*/ |
| 620 | memset ((void *)&t, '\0', sizeof (t)); /* In initial state. */ |
| 621 | /*@=boundswrite@*/ |
| 622 | /* Determine number of characters. */ |
| 623 | n = mbsrtowcs (NULL, &scopy, strlen(scopy), &t); |
| 624 | len += sizeof("=")-1 + n; |
| 625 | } |
| 626 | #else |
| 627 | if (argDescrip) |
| 628 | len += sizeof("=")-1 + strlen(argDescrip); |
| 629 | #endif |
| 630 | |
| 631 | if ((cursor + len) > 79) { |
| 632 | fprintf(fp, "\n "); |
| 633 | cursor = 7; |
| 634 | } |
| 635 | |
| 636 | if (opt->longName && opt->shortName) { |
| 637 | fprintf(fp, " [-%c|-%s%s%s%s]", |
| 638 | opt->shortName, ((opt->argInfo & POPT_ARGFLAG_ONEDASH) ? "" : "-"), |
| 639 | opt->longName, |
| 640 | (argDescrip ? " " : ""), |
| 641 | (argDescrip ? argDescrip : "")); |
| 642 | } else { |
| 643 | fprintf(fp, " [-%s%s%s%s]", |
| 644 | ((opt->shortName || (opt->argInfo & POPT_ARGFLAG_ONEDASH)) ? "" : "-"), |
| 645 | item, |
| 646 | (argDescrip ? (opt->shortName != '\0' ? " " : "=") : ""), |
| 647 | (argDescrip ? argDescrip : "")); |
| 648 | } |
| 649 | |
| 650 | return cursor + len + 1; |
| 651 | } |
| 652 | |
| 653 | /** |
| 654 | * Display popt alias and exec usage. |
| 655 | * @param fp output file handle |
| 656 | * @param cursor current display position |
| 657 | * @param item alias/exec array |
| 658 | * @param nitems no. of ara/exec entries |
| 659 | * @param translation_domain translation domain |
| 660 | */ |
| 661 | static size_t itemUsage(FILE * fp, size_t cursor, |
| 662 | /*@null@*/ poptItem item, int nitems, |
| 663 | /*@null@*/ const char * translation_domain) |
| 664 | /*@globals fileSystem @*/ |
| 665 | /*@modifies *fp, fileSystem @*/ |
| 666 | { |
| 667 | int i; |
| 668 | |
| 669 | /*@-branchstate@*/ /* FIX: W2DO? */ |
| 670 | if (item != NULL) |
| 671 | for (i = 0; i < nitems; i++, item++) { |
| 672 | const struct poptOption * opt; |
| 673 | opt = &item->option; |
| 674 | if ((opt->argInfo & POPT_ARG_MASK) == POPT_ARG_INTL_DOMAIN) { |
| 675 | translation_domain = (const char *)opt->arg; |
| 676 | } else if ((opt->longName || opt->shortName) && |
| 677 | !(opt->argInfo & POPT_ARGFLAG_DOC_HIDDEN)) { |
| 678 | cursor = singleOptionUsage(fp, cursor, opt, translation_domain); |
| 679 | } |
| 680 | } |
| 681 | /*@=branchstate@*/ |
| 682 | |
| 683 | return cursor; |
| 684 | } |
| 685 | |
| 686 | /** |
| 687 | * Keep track of option tables already processed. |
| 688 | */ |
| 689 | typedef struct poptDone_s { |
| 690 | int nopts; |
| 691 | int maxopts; |
| 692 | const void ** opts; |
| 693 | } * poptDone; |
| 694 | |
| 695 | /** |
| 696 | * Display usage text for a table of options. |
| 697 | * @param con context |
| 698 | * @param fp output file handle |
| 699 | * @param cursor current display position |
| 700 | * @param opt option(s) |
| 701 | * @param translation_domain translation domain |
| 702 | * @param done tables already processed |
| 703 | * @return |
| 704 | */ |
| 705 | static size_t singleTableUsage(poptContext con, FILE * fp, size_t cursor, |
| 706 | /*@null@*/ const struct poptOption * opt, |
| 707 | /*@null@*/ const char * translation_domain, |
| 708 | /*@null@*/ poptDone done) |
| 709 | /*@globals fileSystem @*/ |
| 710 | /*@modifies *fp, done, fileSystem @*/ |
| 711 | { |
| 712 | /*@-branchstate@*/ /* FIX: W2DO? */ |
| 713 | if (opt != NULL) |
| 714 | for (; (opt->longName || opt->shortName || opt->arg) ; opt++) { |
| 715 | if ((opt->argInfo & POPT_ARG_MASK) == POPT_ARG_INTL_DOMAIN) { |
| 716 | translation_domain = (const char *)opt->arg; |
| 717 | } else if ((opt->argInfo & POPT_ARG_MASK) == POPT_ARG_INCLUDE_TABLE) { |
| 718 | if (done) { |
| 719 | int i = 0; |
| 720 | for (i = 0; i < done->nopts; i++) { |
| 721 | /*@-boundsread@*/ |
| 722 | const void * that = done->opts[i]; |
| 723 | /*@=boundsread@*/ |
| 724 | if (that == NULL || that != opt->arg) |
| 725 | /*@innercontinue@*/ continue; |
| 726 | /*@innerbreak@*/ break; |
| 727 | } |
| 728 | /* Skip if this table has already been processed. */ |
| 729 | if (opt->arg == NULL || i < done->nopts) |
| 730 | continue; |
| 731 | /*@-boundswrite@*/ |
| 732 | if (done->nopts < done->maxopts) |
| 733 | done->opts[done->nopts++] = (const void *) opt->arg; |
| 734 | /*@=boundswrite@*/ |
| 735 | } |
| 736 | cursor = singleTableUsage(con, fp, cursor, opt->arg, |
| 737 | translation_domain, done); |
| 738 | } else if ((opt->longName || opt->shortName) && |
| 739 | !(opt->argInfo & POPT_ARGFLAG_DOC_HIDDEN)) { |
| 740 | cursor = singleOptionUsage(fp, cursor, opt, translation_domain); |
| 741 | } |
| 742 | } |
| 743 | /*@=branchstate@*/ |
| 744 | |
| 745 | return cursor; |
| 746 | } |
| 747 | |
| 748 | /** |
| 749 | * Return concatenated short options for display. |
| 750 | * @todo Sub-tables should be recursed. |
| 751 | * @param opt option(s) |
| 752 | * @param fp output file handle |
| 753 | * @retval str concatenation of short options |
| 754 | * @return length of display string |
| 755 | */ |
| 756 | static int showShortOptions(const struct poptOption * opt, FILE * fp, |
| 757 | /*@null@*/ char * str) |
| 758 | /*@globals fileSystem @*/ |
| 759 | /*@modifies *str, *fp, fileSystem @*/ |
| 760 | /*@requires maxRead(str) >= 0 @*/ |
| 761 | { |
| 762 | /* bufsize larger then the ascii set, lazy alloca on top level call. */ |
| 763 | char * s = (str != NULL ? str : memset(alloca(300), 0, 300)); |
| 764 | int len = 0; |
| 765 | |
| 766 | /*@-boundswrite@*/ |
| 767 | if (opt != NULL) |
| 768 | for (; (opt->longName || opt->shortName || opt->arg); opt++) { |
| 769 | if (opt->shortName && !(opt->argInfo & POPT_ARG_MASK)) |
| 770 | s[strlen(s)] = opt->shortName; |
| 771 | else if ((opt->argInfo & POPT_ARG_MASK) == POPT_ARG_INCLUDE_TABLE) |
| 772 | if (opt->arg) /* XXX program error */ |
| 773 | len = showShortOptions(opt->arg, fp, s); |
| 774 | } |
| 775 | /*@=boundswrite@*/ |
| 776 | |
| 777 | /* On return to top level, print the short options, return print length. */ |
| 778 | if (s == str && *s != '\0') { |
| 779 | fprintf(fp, " [-%s]", s); |
| 780 | len = strlen(s) + sizeof(" [-]")-1; |
| 781 | } |
| 782 | return len; |
| 783 | } |
| 784 | |
| 785 | void poptPrintUsage(poptContext con, FILE * fp, /*@unused@*/ int flags) |
| 786 | { |
| 787 | poptDone done = memset(alloca(sizeof(*done)), 0, sizeof(*done)); |
| 788 | size_t cursor; |
| 789 | |
| 790 | done->nopts = 0; |
| 791 | done->maxopts = 64; |
| 792 | cursor = done->maxopts * sizeof(*done->opts); |
| 793 | /*@-boundswrite@*/ |
| 794 | done->opts = memset(alloca(cursor), 0, cursor); |
| 795 | /*@-keeptrans@*/ |
| 796 | done->opts[done->nopts++] = (const void *) con->options; |
| 797 | /*@=keeptrans@*/ |
| 798 | /*@=boundswrite@*/ |
| 799 | |
| 800 | cursor = showHelpIntro(con, fp); |
| 801 | cursor += showShortOptions(con->options, fp, NULL); |
| 802 | cursor = singleTableUsage(con, fp, cursor, con->options, NULL, done); |
| 803 | cursor = itemUsage(fp, cursor, con->aliases, con->numAliases, NULL); |
| 804 | cursor = itemUsage(fp, cursor, con->execs, con->numExecs, NULL); |
| 805 | |
| 806 | if (con->otherHelp) { |
| 807 | cursor += strlen(con->otherHelp) + 1; |
| 808 | if (cursor > 79) fprintf(fp, "\n "); |
| 809 | fprintf(fp, " %s", con->otherHelp); |
| 810 | } |
| 811 | |
| 812 | fprintf(fp, "\n"); |
| 813 | } |
| 814 | |
| 815 | void poptSetOtherOptionHelp(poptContext con, const char * text) |
| 816 | { |
| 817 | con->otherHelp = _free(con->otherHelp); |
| 818 | con->otherHelp = xstrdup(text); |
| 819 | } |