1/*- 2 * Copyright (c) 1990, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * Chris Torek. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. Neither the name of the University nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 */ 32 33#if defined(LIBC_SCCS) && !defined(lint) 34static char sccsid[] = "@(#)vfprintf.c 8.1 (Berkeley) 6/4/93"; 35#endif /* LIBC_SCCS and not lint */ 36#include <sys/cdefs.h> 37__FBSDID("$FreeBSD$"); 38 39/* 40 * This is the code responsible for handling positional arguments 41 * (%m$ and %m$.n$) for vfprintf() and vfwprintf(). 42 */ 43 44#include "namespace.h" 45#include <sys/types.h> 46 47#include <stdarg.h> 48#include <stddef.h> 49#include <stdint.h> 50#include <stdio.h> 51#include <stdlib.h> 52#include <string.h> 53#include <wchar.h> 54 55#include "un-namespace.h" 56#include "printflocal.h" 57 58/* 59 * Type ids for argument type table. 60 */ 61enum typeid { 62 T_UNUSED, TP_SHORT, T_INT, T_U_INT, TP_INT, 63 T_LONG, T_U_LONG, TP_LONG, T_LLONG, T_U_LLONG, TP_LLONG, 64 T_PTRDIFFT, TP_PTRDIFFT, T_SSIZET, T_SIZET, TP_SSIZET, 65 T_INTMAXT, T_UINTMAXT, TP_INTMAXT, TP_VOID, TP_CHAR, TP_SCHAR, 66 T_DOUBLE, T_LONG_DOUBLE, T_WINT, TP_WCHAR 67}; 68 69/* An expandable array of types. */ 70struct typetable { 71 enum typeid *table; /* table of types */ 72 enum typeid stattable[STATIC_ARG_TBL_SIZE]; 73 int tablesize; /* current size of type table */ 74 int tablemax; /* largest used index in table */ 75 int nextarg; /* 1-based argument index */ 76}; 77 78static int __grow_type_table(struct typetable *); 79static void build_arg_table (struct typetable *, va_list, union arg **); 80 81/* 82 * Initialize a struct typetable. 83 */ 84static inline void 85inittypes(struct typetable *types) 86{ 87 int n; 88 89 types->table = types->stattable; 90 types->tablesize = STATIC_ARG_TBL_SIZE; 91 types->tablemax = 0; 92 types->nextarg = 1; 93 for (n = 0; n < STATIC_ARG_TBL_SIZE; n++) 94 types->table[n] = T_UNUSED; 95} 96 97/* 98 * struct typetable destructor. 99 */ 100static inline void 101freetypes(struct typetable *types) 102{ 103 104 if (types->table != types->stattable) 105 free (types->table); 106} 107 108/* 109 * Ensure that there is space to add a new argument type to the type table. 110 * Expand the table if necessary. Returns 0 on success. 111 */ 112static inline int 113_ensurespace(struct typetable *types) 114{ 115 116 if (types->nextarg >= types->tablesize) { 117 if (__grow_type_table(types)) 118 return (-1); 119 } 120 if (types->nextarg > types->tablemax) 121 types->tablemax = types->nextarg; 122 return (0); 123} 124 125/* 126 * Add an argument type to the table, expanding if necessary. 127 * Returns 0 on success. 128 */ 129static inline int 130addtype(struct typetable *types, enum typeid type) 131{ 132 133 if (_ensurespace(types)) 134 return (-1); 135 types->table[types->nextarg++] = type; 136 return (0); 137} 138 139static inline int 140addsarg(struct typetable *types, int flags) 141{ 142 143 if (_ensurespace(types)) 144 return (-1); 145 if (flags & INTMAXT) 146 types->table[types->nextarg++] = T_INTMAXT; 147 else if (flags & SIZET) 148 types->table[types->nextarg++] = T_SSIZET; 149 else if (flags & PTRDIFFT) 150 types->table[types->nextarg++] = T_PTRDIFFT; 151 else if (flags & LLONGINT) 152 types->table[types->nextarg++] = T_LLONG; 153 else if (flags & LONGINT) 154 types->table[types->nextarg++] = T_LONG; 155 else 156 types->table[types->nextarg++] = T_INT; 157 return (0); 158} 159 160static inline int 161adduarg(struct typetable *types, int flags) 162{ 163 164 if (_ensurespace(types)) 165 return (-1); 166 if (flags & INTMAXT) 167 types->table[types->nextarg++] = T_UINTMAXT; 168 else if (flags & SIZET) 169 types->table[types->nextarg++] = T_SIZET; 170 else if (flags & PTRDIFFT) 171 types->table[types->nextarg++] = T_SIZET; 172 else if (flags & LLONGINT) 173 types->table[types->nextarg++] = T_U_LLONG; 174 else if (flags & LONGINT) 175 types->table[types->nextarg++] = T_U_LONG; 176 else 177 types->table[types->nextarg++] = T_U_INT; 178 return (0); 179} 180 181/* 182 * Add * arguments to the type array. 183 */ 184static inline int 185addaster(struct typetable *types, char **fmtp) 186{ 187 char *cp; 188 int n2; 189 190 n2 = 0; 191 cp = *fmtp; 192 while (is_digit(*cp)) { 193 n2 = 10 * n2 + to_digit(*cp); 194 cp++; 195 } 196 if (*cp == '$') { 197 int hold = types->nextarg; 198 types->nextarg = n2; 199 if (addtype(types, T_INT)) 200 return (-1); 201 types->nextarg = hold; 202 *fmtp = ++cp; 203 } else { 204 if (addtype(types, T_INT)) 205 return (-1); 206 } 207 return (0); 208} 209 210static inline int 211addwaster(struct typetable *types, wchar_t **fmtp) 212{ 213 wchar_t *cp; 214 int n2; 215 216 n2 = 0; 217 cp = *fmtp; 218 while (is_digit(*cp)) { 219 n2 = 10 * n2 + to_digit(*cp); 220 cp++; 221 } 222 if (*cp == '$') { 223 int hold = types->nextarg; 224 types->nextarg = n2; 225 if (addtype(types, T_INT)) 226 return (-1); 227 types->nextarg = hold; 228 *fmtp = ++cp; 229 } else { 230 if (addtype(types, T_INT)) 231 return (-1); 232 } 233 return (0); 234} 235 236/* 237 * Find all arguments when a positional parameter is encountered. Returns a 238 * table, indexed by argument number, of pointers to each arguments. The 239 * initial argument table should be an array of STATIC_ARG_TBL_SIZE entries. 240 * It will be replaces with a malloc-ed one if it overflows. 241 * Returns 0 on success. On failure, returns nonzero and sets errno. 242 */ 243int 244__find_arguments (const char *fmt0, va_list ap, union arg **argtable) 245{ 246 char *fmt; /* format string */ 247 int ch; /* character from fmt */ 248 int n; /* handy integer (short term usage) */ 249 int error; 250 int flags; /* flags as above */ 251 struct typetable types; /* table of types */ 252 253 fmt = (char *)fmt0; 254 inittypes(&types); 255 error = 0; 256 257 /* 258 * Scan the format for conversions (`%' character). 259 */ 260 for (;;) { 261 while ((ch = *fmt) != '\0' && ch != '%') 262 fmt++; 263 if (ch == '\0') 264 goto done; 265 fmt++; /* skip over '%' */ 266 267 flags = 0; 268 269rflag: ch = *fmt++; 270reswitch: switch (ch) { 271 case ' ': 272 case '#': 273 goto rflag; 274 case '*': 275 if ((error = addaster(&types, &fmt))) 276 goto error; 277 goto rflag; 278 case '-': 279 case '+': 280 case '\'': 281 goto rflag; 282 case '.': 283 if ((ch = *fmt++) == '*') { 284 if ((error = addaster(&types, &fmt))) 285 goto error; 286 goto rflag; 287 } 288 while (is_digit(ch)) { 289 ch = *fmt++; 290 } 291 goto reswitch; 292 case '0': 293 goto rflag; 294 case '1': case '2': case '3': case '4': 295 case '5': case '6': case '7': case '8': case '9': 296 n = 0; 297 do { 298 n = 10 * n + to_digit(ch); 299 ch = *fmt++; 300 } while (is_digit(ch)); 301 if (ch == '$') { 302 types.nextarg = n; 303 goto rflag; 304 } 305 goto reswitch; 306#ifndef NO_FLOATING_POINT 307 case 'L': 308 flags |= LONGDBL; 309 goto rflag; 310#endif 311 case 'h': 312 if (flags & SHORTINT) { 313 flags &= ~SHORTINT; 314 flags |= CHARINT; 315 } else 316 flags |= SHORTINT; 317 goto rflag; 318 case 'j': 319 flags |= INTMAXT; 320 goto rflag; 321 case 'l': 322 if (flags & LONGINT) { 323 flags &= ~LONGINT; 324 flags |= LLONGINT; 325 } else 326 flags |= LONGINT; 327 goto rflag; 328 case 'q': 329 flags |= LLONGINT; /* not necessarily */ 330 goto rflag; 331 case 't': 332 flags |= PTRDIFFT; 333 goto rflag; 334 case 'z': 335 flags |= SIZET; 336 goto rflag; 337 case 'C': 338 flags |= LONGINT; 339 /*FALLTHROUGH*/ 340 case 'c': 341 error = addtype(&types, 342 (flags & LONGINT) ? T_WINT : T_INT); 343 if (error) 344 goto error; 345 break; 346 case 'D': 347 flags |= LONGINT; 348 /*FALLTHROUGH*/ 349 case 'd': 350 case 'i': 351 if ((error = addsarg(&types, flags))) 352 goto error; 353 break; 354#ifndef NO_FLOATING_POINT 355 case 'a': 356 case 'A': 357 case 'e': 358 case 'E': 359 case 'f': 360 case 'g': 361 case 'G': 362 error = addtype(&types, 363 (flags & LONGDBL) ? T_LONG_DOUBLE : T_DOUBLE); 364 if (error) 365 goto error; 366 break; 367#endif /* !NO_FLOATING_POINT */ 368 case 'n': 369 if (flags & INTMAXT) 370 error = addtype(&types, TP_INTMAXT); 371 else if (flags & PTRDIFFT) 372 error = addtype(&types, TP_PTRDIFFT); 373 else if (flags & SIZET) 374 error = addtype(&types, TP_SSIZET); 375 else if (flags & LLONGINT) 376 error = addtype(&types, TP_LLONG); 377 else if (flags & LONGINT) 378 error = addtype(&types, TP_LONG); 379 else if (flags & SHORTINT) 380 error = addtype(&types, TP_SHORT); 381 else if (flags & CHARINT) 382 error = addtype(&types, TP_SCHAR); 383 else 384 error = addtype(&types, TP_INT); 385 if (error) 386 goto error; 387 continue; /* no output */ 388 case 'O': 389 flags |= LONGINT; 390 /*FALLTHROUGH*/ 391 case 'o': 392 if ((error = adduarg(&types, flags))) 393 goto error; 394 break; 395 case 'p': 396 if ((error = addtype(&types, TP_VOID))) 397 goto error; 398 break; 399 case 'S': 400 flags |= LONGINT; 401 /*FALLTHROUGH*/ 402 case 's': 403 error = addtype(&types, 404 (flags & LONGINT) ? TP_WCHAR : TP_CHAR); 405 if (error) 406 goto error; 407 break; 408 case 'U': 409 flags |= LONGINT; 410 /*FALLTHROUGH*/ 411 case 'u': 412 case 'X': 413 case 'x': 414 if ((error = adduarg(&types, flags))) 415 goto error; 416 break; 417 default: /* "%?" prints ?, unless ? is NUL */ 418 if (ch == '\0') 419 goto done; 420 break; 421 } 422 } 423done: 424 build_arg_table(&types, ap, argtable); 425error: 426 freetypes(&types); 427 return (error || *argtable == NULL); 428} 429 430/* wchar version of __find_arguments. */ 431int 432__find_warguments (const wchar_t *fmt0, va_list ap, union arg **argtable) 433{ 434 wchar_t *fmt; /* format string */ 435 wchar_t ch; /* character from fmt */ 436 int n; /* handy integer (short term usage) */ 437 int error; 438 int flags; /* flags as above */ 439 struct typetable types; /* table of types */ 440 441 fmt = (wchar_t *)fmt0; 442 inittypes(&types); 443 error = 0; 444 445 /* 446 * Scan the format for conversions (`%' character). 447 */ 448 for (;;) { 449 while ((ch = *fmt) != '\0' && ch != '%') 450 fmt++; 451 if (ch == '\0') 452 goto done; 453 fmt++; /* skip over '%' */ 454 455 flags = 0; 456 457rflag: ch = *fmt++; 458reswitch: switch (ch) { 459 case ' ': 460 case '#': 461 goto rflag; 462 case '*': 463 if ((error = addwaster(&types, &fmt))) 464 goto error; 465 goto rflag; 466 case '-': 467 case '+': 468 case '\'': 469 goto rflag; 470 case '.': 471 if ((ch = *fmt++) == '*') { 472 if ((error = addwaster(&types, &fmt))) 473 goto error; 474 goto rflag; 475 } 476 while (is_digit(ch)) { 477 ch = *fmt++; 478 } 479 goto reswitch; 480 case '0': 481 goto rflag; 482 case '1': case '2': case '3': case '4': 483 case '5': case '6': case '7': case '8': case '9': 484 n = 0; 485 do { 486 n = 10 * n + to_digit(ch); 487 ch = *fmt++; 488 } while (is_digit(ch)); 489 if (ch == '$') { 490 types.nextarg = n; 491 goto rflag; 492 } 493 goto reswitch; 494#ifndef NO_FLOATING_POINT 495 case 'L': 496 flags |= LONGDBL; 497 goto rflag; 498#endif 499 case 'h': 500 if (flags & SHORTINT) { 501 flags &= ~SHORTINT; 502 flags |= CHARINT; 503 } else 504 flags |= SHORTINT; 505 goto rflag; 506 case 'j': 507 flags |= INTMAXT; 508 goto rflag; 509 case 'l': 510 if (flags & LONGINT) { 511 flags &= ~LONGINT; 512 flags |= LLONGINT; 513 } else 514 flags |= LONGINT; 515 goto rflag; 516 case 'q': 517 flags |= LLONGINT; /* not necessarily */ 518 goto rflag; 519 case 't': 520 flags |= PTRDIFFT; 521 goto rflag; 522 case 'z': 523 flags |= SIZET; 524 goto rflag; 525 case 'C': 526 flags |= LONGINT; 527 /*FALLTHROUGH*/ 528 case 'c': 529 error = addtype(&types, 530 (flags & LONGINT) ? T_WINT : T_INT); 531 if (error) 532 goto error; 533 break; 534 case 'D': 535 flags |= LONGINT; 536 /*FALLTHROUGH*/ 537 case 'd': 538 case 'i': 539 if ((error = addsarg(&types, flags))) 540 goto error; 541 break; 542#ifndef NO_FLOATING_POINT 543 case 'a': 544 case 'A': 545 case 'e': 546 case 'E': 547 case 'f': 548 case 'g': 549 case 'G': 550 error = addtype(&types, 551 (flags & LONGDBL) ? T_LONG_DOUBLE : T_DOUBLE); 552 if (error) 553 goto error; 554 break; 555#endif /* !NO_FLOATING_POINT */ 556 case 'n': 557 if (flags & INTMAXT) 558 error = addtype(&types, TP_INTMAXT); 559 else if (flags & PTRDIFFT) 560 error = addtype(&types, TP_PTRDIFFT); 561 else if (flags & SIZET) 562 error = addtype(&types, TP_SSIZET); 563 else if (flags & LLONGINT) 564 error = addtype(&types, TP_LLONG); 565 else if (flags & LONGINT) 566 error = addtype(&types, TP_LONG); 567 else if (flags & SHORTINT) 568 error = addtype(&types, TP_SHORT); 569 else if (flags & CHARINT) 570 error = addtype(&types, TP_SCHAR); 571 else 572 error = addtype(&types, TP_INT); 573 if (error) 574 goto error; 575 continue; /* no output */ 576 case 'O': 577 flags |= LONGINT; 578 /*FALLTHROUGH*/ 579 case 'o': 580 if ((error = adduarg(&types, flags))) 581 goto error; 582 break; 583 case 'p': 584 if ((error = addtype(&types, TP_VOID))) 585 goto error; 586 break; 587 case 'S': 588 flags |= LONGINT; 589 /*FALLTHROUGH*/ 590 case 's': 591 error = addtype(&types, 592 (flags & LONGINT) ? TP_WCHAR : TP_CHAR); 593 if (error) 594 goto error; 595 break; 596 case 'U': 597 flags |= LONGINT; 598 /*FALLTHROUGH*/ 599 case 'u': 600 case 'X': 601 case 'x': 602 if ((error = adduarg(&types, flags))) 603 goto error; 604 break; 605 default: /* "%?" prints ?, unless ? is NUL */ 606 if (ch == '\0') 607 goto done; 608 break; 609 } 610 } 611done: 612 build_arg_table(&types, ap, argtable); 613error: 614 freetypes(&types); 615 return (error || *argtable == NULL); 616} 617 618/* 619 * Increase the size of the type table. Returns 0 on success. 620 */ 621static int 622__grow_type_table(struct typetable *types) 623{ 624 enum typeid *const oldtable = types->table; 625 const int oldsize = types->tablesize; 626 enum typeid *newtable; 627 int n, newsize = oldsize * 2; 628 629 if (newsize < types->nextarg + 1) 630 newsize = types->nextarg + 1; 631 if (oldsize == STATIC_ARG_TBL_SIZE) { 632 if ((newtable = malloc(newsize * sizeof(enum typeid))) == NULL) 633 return (-1); 634 bcopy(oldtable, newtable, oldsize * sizeof(enum typeid)); 635 } else { 636 newtable = realloc(oldtable, newsize * sizeof(enum typeid)); 637 if (newtable == NULL) 638 return (-1); 639 } 640 for (n = oldsize; n < newsize; n++) 641 newtable[n] = T_UNUSED; 642 643 types->table = newtable; 644 types->tablesize = newsize; 645 646 return (0); 647} 648 649/* 650 * Build the argument table from the completed type table. 651 * On malloc failure, *argtable is set to NULL. 652 */ 653static void 654build_arg_table(struct typetable *types, va_list ap, union arg **argtable) 655{ 656 int n; 657 658 if (types->tablemax >= STATIC_ARG_TBL_SIZE) { 659 *argtable = (union arg *) 660 malloc (sizeof (union arg) * (types->tablemax + 1)); 661 if (*argtable == NULL) 662 return; 663 } 664 665 (*argtable) [0].intarg = 0; 666 for (n = 1; n <= types->tablemax; n++) { 667 switch (types->table[n]) { 668 case T_UNUSED: /* whoops! */ 669 (*argtable) [n].intarg = va_arg (ap, int); 670 break; 671 case TP_SCHAR: 672 (*argtable) [n].pschararg = va_arg (ap, signed char *); 673 break; 674 case TP_SHORT: 675 (*argtable) [n].pshortarg = va_arg (ap, short *); 676 break; 677 case T_INT: 678 (*argtable) [n].intarg = va_arg (ap, int); 679 break; 680 case T_U_INT: 681 (*argtable) [n].uintarg = va_arg (ap, unsigned int); 682 break; 683 case TP_INT: 684 (*argtable) [n].pintarg = va_arg (ap, int *); 685 break; 686 case T_LONG: 687 (*argtable) [n].longarg = va_arg (ap, long); 688 break; 689 case T_U_LONG: 690 (*argtable) [n].ulongarg = va_arg (ap, unsigned long); 691 break; 692 case TP_LONG: 693 (*argtable) [n].plongarg = va_arg (ap, long *); 694 break; 695 case T_LLONG: 696 (*argtable) [n].longlongarg = va_arg (ap, long long); 697 break; 698 case T_U_LLONG: 699 (*argtable) [n].ulonglongarg = va_arg (ap, unsigned long long); 700 break; 701 case TP_LLONG: 702 (*argtable) [n].plonglongarg = va_arg (ap, long long *); 703 break; 704 case T_PTRDIFFT: 705 (*argtable) [n].ptrdiffarg = va_arg (ap, ptrdiff_t); 706 break; 707 case TP_PTRDIFFT: 708 (*argtable) [n].pptrdiffarg = va_arg (ap, ptrdiff_t *); 709 break; 710 case T_SIZET: 711 (*argtable) [n].sizearg = va_arg (ap, size_t); 712 break; 713 case T_SSIZET: 714 (*argtable) [n].sizearg = va_arg (ap, ssize_t); 715 break; 716 case TP_SSIZET: 717 (*argtable) [n].pssizearg = va_arg (ap, ssize_t *); 718 break; 719 case T_INTMAXT: 720 (*argtable) [n].intmaxarg = va_arg (ap, intmax_t); 721 break; 722 case T_UINTMAXT: 723 (*argtable) [n].uintmaxarg = va_arg (ap, uintmax_t); 724 break; 725 case TP_INTMAXT: 726 (*argtable) [n].pintmaxarg = va_arg (ap, intmax_t *); 727 break; 728 case T_DOUBLE: 729#ifndef NO_FLOATING_POINT 730 (*argtable) [n].doublearg = va_arg (ap, double); 731#endif 732 break; 733 case T_LONG_DOUBLE: 734#ifndef NO_FLOATING_POINT 735 (*argtable) [n].longdoublearg = va_arg (ap, long double); 736#endif 737 break; 738 case TP_CHAR: 739 (*argtable) [n].pchararg = va_arg (ap, char *); 740 break; 741 case TP_VOID: 742 (*argtable) [n].pvoidarg = va_arg (ap, void *); 743 break; 744 case T_WINT: 745 (*argtable) [n].wintarg = va_arg (ap, wint_t); 746 break; 747 case TP_WCHAR: 748 (*argtable) [n].pwchararg = va_arg (ap, wchar_t *); 749 break; 750 } 751 } 752} 753