1 /* 2 * Copyright (c) 2000-2001, 2004 Sendmail, Inc. and its suppliers. 3 * All rights reserved. 4 * Copyright (c) 1990 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Chris Torek. 9 * 10 * By using this file, you agree to the terms and conditions set 11 * forth in the LICENSE file which can be found at the top level of 12 * the sendmail distribution. 13 */ 14 15 #include <sm/gen.h> 16 SM_IDSTR(id, "@(#)$Id: vfprintf.c,v 1.54 2005/05/16 03:52:00 ca Exp $") 17 18 /* 19 ** Overall: 20 ** Actual printing innards. 21 ** This code is large and complicated... 22 */ 23 24 #include <sys/types.h> 25 #include <stdlib.h> 26 #include <string.h> 27 #include <errno.h> 28 #include <sm/config.h> 29 #include <sm/varargs.h> 30 #include <sm/io.h> 31 #include <sm/heap.h> 32 #include <sm/conf.h> 33 #include "local.h" 34 #include "fvwrite.h" 35 36 static int sm_bprintf __P((SM_FILE_T *, const char *, va_list)); 37 static void sm_find_arguments __P((const char *, va_list , va_list **)); 38 static void sm_grow_type_table_x __P((unsigned char **, int *)); 39 static int sm_print __P((SM_FILE_T *, int, struct sm_uio *)); 40 41 /* 42 ** SM_PRINT -- print/flush to the file 43 ** 44 ** Flush out all the vectors defined by the given uio, 45 ** then reset it so that it can be reused. 46 ** 47 ** Parameters: 48 ** fp -- file pointer 49 ** timeout -- time to complete operation (milliseconds) 50 ** uio -- vector list of memory locations of data for printing 51 ** 52 ** Results: 53 ** Success: 0 (zero) 54 ** Failure: 55 */ 56 57 static int 58 sm_print(fp, timeout, uio) 59 SM_FILE_T *fp; 60 int timeout; 61 register struct sm_uio *uio; 62 { 63 register int err; 64 65 if (uio->uio_resid == 0) 66 { 67 uio->uio_iovcnt = 0; 68 return 0; 69 } 70 err = sm_fvwrite(fp, timeout, uio); 71 uio->uio_resid = 0; 72 uio->uio_iovcnt = 0; 73 return err; 74 } 75 76 /* 77 ** SM_BPRINTF -- allow formating to an unbuffered file. 78 ** 79 ** Helper function for `fprintf to unbuffered unix file': creates a 80 ** temporary buffer (via a "fake" file pointer). 81 ** We only work on write-only files; this avoids 82 ** worries about ungetc buffers and so forth. 83 ** 84 ** Parameters: 85 ** fp -- the file to send the o/p to 86 ** fmt -- format instructions for the o/p 87 ** ap -- vectors of data units used for formating 88 ** 89 ** Results: 90 ** Failure: SM_IO_EOF and errno set 91 ** Success: number of data units used in the formating 92 ** 93 ** Side effects: 94 ** formatted o/p can be SM_IO_BUFSIZ length maximum 95 */ 96 97 static int 98 sm_bprintf(fp, fmt, ap) 99 SM_FILE_T *fp; 100 const char *fmt; 101 SM_VA_LOCAL_DECL 102 { 103 int ret; 104 SM_FILE_T fake; 105 unsigned char buf[SM_IO_BUFSIZ]; 106 extern const char SmFileMagic[]; 107 108 /* copy the important variables */ 109 fake.sm_magic = SmFileMagic; 110 fake.f_timeout = SM_TIME_FOREVER; 111 fake.f_timeoutstate = SM_TIME_BLOCK; 112 fake.f_flags = fp->f_flags & ~SMNBF; 113 fake.f_file = fp->f_file; 114 fake.f_cookie = fp->f_cookie; 115 fake.f_write = fp->f_write; 116 fake.f_close = NULL; 117 fake.f_open = NULL; 118 fake.f_read = NULL; 119 fake.f_seek = NULL; 120 fake.f_setinfo = fake.f_getinfo = NULL; 121 fake.f_type = "sm_bprintf:fake"; 122 123 /* set up the buffer */ 124 fake.f_bf.smb_base = fake.f_p = buf; 125 fake.f_bf.smb_size = fake.f_w = sizeof(buf); 126 fake.f_lbfsize = 0; /* not actually used, but Just In Case */ 127 128 /* do the work, then copy any error status */ 129 ret = sm_io_vfprintf(&fake, SM_TIME_FOREVER, fmt, ap); 130 if (ret >= 0 && sm_io_flush(&fake, SM_TIME_FOREVER)) 131 ret = SM_IO_EOF; /* errno set by sm_io_flush */ 132 if (fake.f_flags & SMERR) 133 fp->f_flags |= SMERR; 134 return ret; 135 } 136 137 138 #define BUF 40 139 140 #define STATIC_ARG_TBL_SIZE 8 /* Size of static argument table. */ 141 142 143 /* Macros for converting digits to letters and vice versa */ 144 #define to_digit(c) ((c) - '0') 145 #define is_digit(c) ((unsigned) to_digit(c) <= 9) 146 #define to_char(n) ((char) (n) + '0') 147 148 /* Flags used during conversion. */ 149 #define ALT 0x001 /* alternate form */ 150 #define HEXPREFIX 0x002 /* add 0x or 0X prefix */ 151 #define LADJUST 0x004 /* left adjustment */ 152 #define LONGINT 0x010 /* long integer */ 153 #define QUADINT 0x020 /* quad integer */ 154 #define SHORTINT 0x040 /* short integer */ 155 #define ZEROPAD 0x080 /* zero (as opposed to blank) pad */ 156 #define FPT 0x100 /* Floating point number */ 157 158 /* 159 ** SM_IO_VPRINTF -- performs actual formating for o/p 160 ** 161 ** Parameters: 162 ** fp -- file pointer for o/p 163 ** timeout -- time to complete the print 164 ** fmt0 -- formating directives 165 ** ap -- vectors with data units for formating 166 ** 167 ** Results: 168 ** Success: number of data units used for formatting 169 ** Failure: SM_IO_EOF and sets errno 170 */ 171 172 int 173 sm_io_vfprintf(fp, timeout, fmt0, ap) 174 SM_FILE_T *fp; 175 int timeout; 176 const char *fmt0; 177 SM_VA_LOCAL_DECL 178 { 179 register char *fmt; /* format string */ 180 register int ch; /* character from fmt */ 181 register int n, m, n2; /* handy integers (short term usage) */ 182 register char *cp; /* handy char pointer (short term usage) */ 183 register struct sm_iov *iovp;/* for PRINT macro */ 184 register int flags; /* flags as above */ 185 int ret; /* return value accumulator */ 186 int width; /* width from format (%8d), or 0 */ 187 int prec; /* precision from format (%.3d), or -1 */ 188 char sign; /* sign prefix (' ', '+', '-', or \0) */ 189 wchar_t wc; 190 ULONGLONG_T _uquad; /* integer arguments %[diouxX] */ 191 enum { OCT, DEC, HEX } base;/* base for [diouxX] conversion */ 192 int dprec; /* a copy of prec if [diouxX], 0 otherwise */ 193 int realsz; /* field size expanded by dprec */ 194 int size; /* size of converted field or string */ 195 char *xdigs="0123456789abcdef"; /* digits for [xX] conversion */ 196 #define NIOV 8 197 struct sm_uio uio; /* output information: summary */ 198 struct sm_iov iov[NIOV];/* ... and individual io vectors */ 199 char buf[BUF]; /* space for %c, %[diouxX], %[eEfgG] */ 200 char ox[2]; /* space for 0x hex-prefix */ 201 va_list *argtable; /* args, built due to positional arg */ 202 va_list statargtable[STATIC_ARG_TBL_SIZE]; 203 int nextarg; /* 1-based argument index */ 204 va_list orgap; /* original argument pointer */ 205 206 /* 207 ** Choose PADSIZE to trade efficiency vs. size. If larger printf 208 ** fields occur frequently, increase PADSIZE and make the initialisers 209 ** below longer. 210 */ 211 #define PADSIZE 16 /* pad chunk size */ 212 static char blanks[PADSIZE] = 213 {' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' '}; 214 static char zeroes[PADSIZE] = 215 {'0','0','0','0','0','0','0','0','0','0','0','0','0','0','0','0'}; 216 217 /* 218 ** BEWARE, these `goto error' on error, and PAD uses `n'. 219 */ 220 #define PRINT(ptr, len) do { \ 221 iovp->iov_base = (ptr); \ 222 iovp->iov_len = (len); \ 223 uio.uio_resid += (len); \ 224 iovp++; \ 225 if (++uio.uio_iovcnt >= NIOV) \ 226 { \ 227 if (sm_print(fp, timeout, &uio)) \ 228 goto error; \ 229 iovp = iov; \ 230 } \ 231 } while (0) 232 #define PAD(howmany, with) do \ 233 { \ 234 if ((n = (howmany)) > 0) \ 235 { \ 236 while (n > PADSIZE) { \ 237 PRINT(with, PADSIZE); \ 238 n -= PADSIZE; \ 239 } \ 240 PRINT(with, n); \ 241 } \ 242 } while (0) 243 #define FLUSH() do \ 244 { \ 245 if (uio.uio_resid && sm_print(fp, timeout, &uio)) \ 246 goto error; \ 247 uio.uio_iovcnt = 0; \ 248 iovp = iov; \ 249 } while (0) 250 251 /* 252 ** To extend shorts properly, we need both signed and unsigned 253 ** argument extraction methods. 254 */ 255 #define SARG() \ 256 (flags&QUADINT ? SM_VA_ARG(ap, LONGLONG_T) : \ 257 flags&LONGINT ? GETARG(long) : \ 258 flags&SHORTINT ? (long) (short) GETARG(int) : \ 259 (long) GETARG(int)) 260 #define UARG() \ 261 (flags&QUADINT ? SM_VA_ARG(ap, ULONGLONG_T) : \ 262 flags&LONGINT ? GETARG(unsigned long) : \ 263 flags&SHORTINT ? (unsigned long) (unsigned short) GETARG(int) : \ 264 (unsigned long) GETARG(unsigned int)) 265 266 /* 267 ** Get * arguments, including the form *nn$. Preserve the nextarg 268 ** that the argument can be gotten once the type is determined. 269 */ 270 #define GETASTER(val) \ 271 n2 = 0; \ 272 cp = fmt; \ 273 while (is_digit(*cp)) \ 274 { \ 275 n2 = 10 * n2 + to_digit(*cp); \ 276 cp++; \ 277 } \ 278 if (*cp == '$') \ 279 { \ 280 int hold = nextarg; \ 281 if (argtable == NULL) \ 282 { \ 283 argtable = statargtable; \ 284 sm_find_arguments(fmt0, orgap, &argtable); \ 285 } \ 286 nextarg = n2; \ 287 val = GETARG(int); \ 288 nextarg = hold; \ 289 fmt = ++cp; \ 290 } \ 291 else \ 292 { \ 293 val = GETARG(int); \ 294 } 295 296 /* 297 ** Get the argument indexed by nextarg. If the argument table is 298 ** built, use it to get the argument. If its not, get the next 299 ** argument (and arguments must be gotten sequentially). 300 */ 301 302 #if SM_VA_STD 303 # define GETARG(type) \ 304 (((argtable != NULL) ? (void) (ap = argtable[nextarg]) : (void) 0), \ 305 nextarg++, SM_VA_ARG(ap, type)) 306 #else /* SM_VA_STD */ 307 # define GETARG(type) \ 308 ((argtable != NULL) ? (*((type*)(argtable[nextarg++]))) : \ 309 (nextarg++, SM_VA_ARG(ap, type))) 310 #endif /* SM_VA_STD */ 311 312 /* sorry, fprintf(read_only_file, "") returns SM_IO_EOF, not 0 */ 313 if (cantwrite(fp)) 314 { 315 errno = EBADF; 316 return SM_IO_EOF; 317 } 318 319 /* optimise fprintf(stderr) (and other unbuffered Unix files) */ 320 if ((fp->f_flags & (SMNBF|SMWR|SMRW)) == (SMNBF|SMWR) && 321 fp->f_file >= 0) 322 return sm_bprintf(fp, fmt0, ap); 323 324 fmt = (char *) fmt0; 325 argtable = NULL; 326 nextarg = 1; 327 SM_VA_COPY(orgap, ap); 328 uio.uio_iov = iovp = iov; 329 uio.uio_resid = 0; 330 uio.uio_iovcnt = 0; 331 ret = 0; 332 333 /* Scan the format for conversions (`%' character). */ 334 for (;;) 335 { 336 cp = fmt; 337 n = 0; 338 while ((wc = *fmt) != '\0') 339 { 340 if (wc == '%') 341 { 342 n = 1; 343 break; 344 } 345 fmt++; 346 } 347 if ((m = fmt - cp) != 0) 348 { 349 PRINT(cp, m); 350 ret += m; 351 } 352 if (n <= 0) 353 goto done; 354 fmt++; /* skip over '%' */ 355 356 flags = 0; 357 dprec = 0; 358 width = 0; 359 prec = -1; 360 sign = '\0'; 361 362 rflag: ch = *fmt++; 363 reswitch: switch (ch) 364 { 365 case ' ': 366 367 /* 368 ** ``If the space and + flags both appear, the space 369 ** flag will be ignored.'' 370 ** -- ANSI X3J11 371 */ 372 373 if (!sign) 374 sign = ' '; 375 goto rflag; 376 case '#': 377 flags |= ALT; 378 goto rflag; 379 case '*': 380 381 /* 382 ** ``A negative field width argument is taken as a 383 ** - flag followed by a positive field width.'' 384 ** -- ANSI X3J11 385 ** They don't exclude field widths read from args. 386 */ 387 388 GETASTER(width); 389 if (width >= 0) 390 goto rflag; 391 width = -width; 392 /* FALLTHROUGH */ 393 case '-': 394 flags |= LADJUST; 395 goto rflag; 396 case '+': 397 sign = '+'; 398 goto rflag; 399 case '.': 400 if ((ch = *fmt++) == '*') 401 { 402 GETASTER(n); 403 prec = n < 0 ? -1 : n; 404 goto rflag; 405 } 406 n = 0; 407 while (is_digit(ch)) 408 { 409 n = 10 * n + to_digit(ch); 410 ch = *fmt++; 411 } 412 if (ch == '$') 413 { 414 nextarg = n; 415 if (argtable == NULL) 416 { 417 argtable = statargtable; 418 sm_find_arguments(fmt0, orgap, 419 &argtable); 420 } 421 goto rflag; 422 } 423 prec = n < 0 ? -1 : n; 424 goto reswitch; 425 case '0': 426 427 /* 428 ** ``Note that 0 is taken as a flag, not as the 429 ** beginning of a field width.'' 430 ** -- ANSI X3J11 431 */ 432 433 flags |= ZEROPAD; 434 goto rflag; 435 case '1': case '2': case '3': case '4': 436 case '5': case '6': case '7': case '8': case '9': 437 n = 0; 438 do 439 { 440 n = 10 * n + to_digit(ch); 441 ch = *fmt++; 442 } while (is_digit(ch)); 443 if (ch == '$') 444 { 445 nextarg = n; 446 if (argtable == NULL) 447 { 448 argtable = statargtable; 449 sm_find_arguments(fmt0, orgap, 450 &argtable); 451 } 452 goto rflag; 453 } 454 width = n; 455 goto reswitch; 456 case 'h': 457 flags |= SHORTINT; 458 goto rflag; 459 case 'l': 460 if (*fmt == 'l') 461 { 462 fmt++; 463 flags |= QUADINT; 464 } 465 else 466 { 467 flags |= LONGINT; 468 } 469 goto rflag; 470 case 'q': 471 flags |= QUADINT; 472 goto rflag; 473 case 'c': 474 *(cp = buf) = GETARG(int); 475 size = 1; 476 sign = '\0'; 477 break; 478 case 'D': 479 flags |= LONGINT; 480 /*FALLTHROUGH*/ 481 case 'd': 482 case 'i': 483 _uquad = SARG(); 484 if ((LONGLONG_T) _uquad < 0) 485 { 486 _uquad = -(LONGLONG_T) _uquad; 487 sign = '-'; 488 } 489 base = DEC; 490 goto number; 491 case 'e': 492 case 'E': 493 case 'f': 494 case 'g': 495 case 'G': 496 { 497 double val; 498 char *p; 499 char fmt[16]; 500 char out[150]; 501 size_t len; 502 503 /* 504 ** This code implements floating point output 505 ** in the most portable manner possible, 506 ** relying only on 'sprintf' as defined by 507 ** the 1989 ANSI C standard. 508 ** We silently cap width and precision 509 ** at 120, to avoid buffer overflow. 510 */ 511 512 val = GETARG(double); 513 514 p = fmt; 515 *p++ = '%'; 516 if (sign) 517 *p++ = sign; 518 if (flags & ALT) 519 *p++ = '#'; 520 if (flags & LADJUST) 521 *p++ = '-'; 522 if (flags & ZEROPAD) 523 *p++ = '0'; 524 *p++ = '*'; 525 if (prec >= 0) 526 { 527 *p++ = '.'; 528 *p++ = '*'; 529 } 530 *p++ = ch; 531 *p = '\0'; 532 533 if (width > 120) 534 width = 120; 535 if (prec > 120) 536 prec = 120; 537 if (prec >= 0) 538 #if HASSNPRINTF 539 snprintf(out, sizeof(out), fmt, width, 540 prec, val); 541 #else /* HASSNPRINTF */ 542 sprintf(out, fmt, width, prec, val); 543 #endif /* HASSNPRINTF */ 544 else 545 #if HASSNPRINTF 546 snprintf(out, sizeof(out), fmt, width, 547 val); 548 #else /* HASSNPRINTF */ 549 sprintf(out, fmt, width, val); 550 #endif /* HASSNPRINTF */ 551 len = strlen(out); 552 PRINT(out, len); 553 FLUSH(); 554 continue; 555 } 556 case 'n': 557 if (flags & QUADINT) 558 *GETARG(LONGLONG_T *) = ret; 559 else if (flags & LONGINT) 560 *GETARG(long *) = ret; 561 else if (flags & SHORTINT) 562 *GETARG(short *) = ret; 563 else 564 *GETARG(int *) = ret; 565 continue; /* no output */ 566 case 'O': 567 flags |= LONGINT; 568 /*FALLTHROUGH*/ 569 case 'o': 570 _uquad = UARG(); 571 base = OCT; 572 goto nosign; 573 case 'p': 574 575 /* 576 ** ``The argument shall be a pointer to void. The 577 ** value of the pointer is converted to a sequence 578 ** of printable characters, in an implementation- 579 ** defined manner.'' 580 ** -- ANSI X3J11 581 */ 582 583 /* NOSTRICT */ 584 { 585 union 586 { 587 void *p; 588 ULONGLONG_T ll; 589 unsigned long l; 590 unsigned i; 591 } u; 592 u.p = GETARG(void *); 593 if (sizeof(void *) == sizeof(ULONGLONG_T)) 594 _uquad = u.ll; 595 else if (sizeof(void *) == sizeof(long)) 596 _uquad = u.l; 597 else 598 _uquad = u.i; 599 } 600 base = HEX; 601 xdigs = "0123456789abcdef"; 602 flags |= HEXPREFIX; 603 ch = 'x'; 604 goto nosign; 605 case 's': 606 if ((cp = GETARG(char *)) == NULL) 607 cp = "(null)"; 608 if (prec >= 0) 609 { 610 /* 611 ** can't use strlen; can only look for the 612 ** NUL in the first `prec' characters, and 613 ** strlen() will go further. 614 */ 615 616 char *p = memchr(cp, 0, prec); 617 618 if (p != NULL) 619 { 620 size = p - cp; 621 if (size > prec) 622 size = prec; 623 } 624 else 625 size = prec; 626 } 627 else 628 size = strlen(cp); 629 sign = '\0'; 630 break; 631 case 'U': 632 flags |= LONGINT; 633 /*FALLTHROUGH*/ 634 case 'u': 635 _uquad = UARG(); 636 base = DEC; 637 goto nosign; 638 case 'X': 639 xdigs = "0123456789ABCDEF"; 640 goto hex; 641 case 'x': 642 xdigs = "0123456789abcdef"; 643 hex: _uquad = UARG(); 644 base = HEX; 645 /* leading 0x/X only if non-zero */ 646 if (flags & ALT && _uquad != 0) 647 flags |= HEXPREFIX; 648 649 /* unsigned conversions */ 650 nosign: sign = '\0'; 651 652 /* 653 ** ``... diouXx conversions ... if a precision is 654 ** specified, the 0 flag will be ignored.'' 655 ** -- ANSI X3J11 656 */ 657 658 number: if ((dprec = prec) >= 0) 659 flags &= ~ZEROPAD; 660 661 /* 662 ** ``The result of converting a zero value with an 663 ** explicit precision of zero is no characters.'' 664 ** -- ANSI X3J11 665 */ 666 667 cp = buf + BUF; 668 if (_uquad != 0 || prec != 0) 669 { 670 /* 671 ** Unsigned mod is hard, and unsigned mod 672 ** by a constant is easier than that by 673 ** a variable; hence this switch. 674 */ 675 676 switch (base) 677 { 678 case OCT: 679 do 680 { 681 *--cp = to_char(_uquad & 7); 682 _uquad >>= 3; 683 } while (_uquad); 684 /* handle octal leading 0 */ 685 if (flags & ALT && *cp != '0') 686 *--cp = '0'; 687 break; 688 689 case DEC: 690 /* many numbers are 1 digit */ 691 while (_uquad >= 10) 692 { 693 *--cp = to_char(_uquad % 10); 694 _uquad /= 10; 695 } 696 *--cp = to_char(_uquad); 697 break; 698 699 case HEX: 700 do 701 { 702 *--cp = xdigs[_uquad & 15]; 703 _uquad >>= 4; 704 } while (_uquad); 705 break; 706 707 default: 708 cp = "bug in sm_io_vfprintf: bad base"; 709 size = strlen(cp); 710 goto skipsize; 711 } 712 } 713 size = buf + BUF - cp; 714 skipsize: 715 break; 716 default: /* "%?" prints ?, unless ? is NUL */ 717 if (ch == '\0') 718 goto done; 719 /* pretend it was %c with argument ch */ 720 cp = buf; 721 *cp = ch; 722 size = 1; 723 sign = '\0'; 724 break; 725 } 726 727 /* 728 ** All reasonable formats wind up here. At this point, `cp' 729 ** points to a string which (if not flags&LADJUST) should be 730 ** padded out to `width' places. If flags&ZEROPAD, it should 731 ** first be prefixed by any sign or other prefix; otherwise, 732 ** it should be blank padded before the prefix is emitted. 733 ** After any left-hand padding and prefixing, emit zeroes 734 ** required by a decimal [diouxX] precision, then print the 735 ** string proper, then emit zeroes required by any leftover 736 ** floating precision; finally, if LADJUST, pad with blanks. 737 ** 738 ** Compute actual size, so we know how much to pad. 739 ** size excludes decimal prec; realsz includes it. 740 */ 741 742 realsz = dprec > size ? dprec : size; 743 if (sign) 744 realsz++; 745 else if (flags & HEXPREFIX) 746 realsz+= 2; 747 748 /* right-adjusting blank padding */ 749 if ((flags & (LADJUST|ZEROPAD)) == 0) 750 PAD(width - realsz, blanks); 751 752 /* prefix */ 753 if (sign) 754 { 755 PRINT(&sign, 1); 756 } 757 else if (flags & HEXPREFIX) 758 { 759 ox[0] = '0'; 760 ox[1] = ch; 761 PRINT(ox, 2); 762 } 763 764 /* right-adjusting zero padding */ 765 if ((flags & (LADJUST|ZEROPAD)) == ZEROPAD) 766 PAD(width - realsz, zeroes); 767 768 /* leading zeroes from decimal precision */ 769 PAD(dprec - size, zeroes); 770 771 /* the string or number proper */ 772 PRINT(cp, size); 773 /* left-adjusting padding (always blank) */ 774 if (flags & LADJUST) 775 PAD(width - realsz, blanks); 776 777 /* finally, adjust ret */ 778 ret += width > realsz ? width : realsz; 779 780 FLUSH(); /* copy out the I/O vectors */ 781 } 782 done: 783 FLUSH(); 784 error: 785 if ((argtable != NULL) && (argtable != statargtable)) 786 sm_free(argtable); 787 return sm_error(fp) ? SM_IO_EOF : ret; 788 /* NOTREACHED */ 789 } 790 791 /* Type ids for argument type table. */ 792 #define T_UNUSED 0 793 #define T_SHORT 1 794 #define T_U_SHORT 2 795 #define TP_SHORT 3 796 #define T_INT 4 797 #define T_U_INT 5 798 #define TP_INT 6 799 #define T_LONG 7 800 #define T_U_LONG 8 801 #define TP_LONG 9 802 #define T_QUAD 10 803 #define T_U_QUAD 11 804 #define TP_QUAD 12 805 #define T_DOUBLE 13 806 #define TP_CHAR 15 807 #define TP_VOID 16 808 809 /* 810 ** SM_FIND_ARGUMENTS -- find all args when a positional parameter is found. 811 ** 812 ** Find all arguments when a positional parameter is encountered. Returns a 813 ** table, indexed by argument number, of pointers to each arguments. The 814 ** initial argument table should be an array of STATIC_ARG_TBL_SIZE entries. 815 ** It will be replaced with a malloc-ed one if it overflows. 816 ** 817 ** Parameters: 818 ** fmt0 -- formating directives 819 ** ap -- vector list of data unit for formating consumption 820 ** argtable -- an indexable table (returned) of 'ap' 821 ** 822 ** Results: 823 ** none. 824 */ 825 826 static void 827 sm_find_arguments(fmt0, ap, argtable) 828 const char *fmt0; 829 SM_VA_LOCAL_DECL 830 va_list **argtable; 831 { 832 register char *fmt; /* format string */ 833 register int ch; /* character from fmt */ 834 register int n, n2; /* handy integer (short term usage) */ 835 register char *cp; /* handy char pointer (short term usage) */ 836 register int flags; /* flags as above */ 837 unsigned char *typetable; /* table of types */ 838 unsigned char stattypetable[STATIC_ARG_TBL_SIZE]; 839 int tablesize; /* current size of type table */ 840 int tablemax; /* largest used index in table */ 841 int nextarg; /* 1-based argument index */ 842 843 /* Add an argument type to the table, expanding if necessary. */ 844 #define ADDTYPE(type) \ 845 ((nextarg >= tablesize) ? \ 846 (sm_grow_type_table_x(&typetable, &tablesize), 0) : 0, \ 847 typetable[nextarg++] = type, \ 848 (nextarg > tablemax) ? tablemax = nextarg : 0) 849 850 #define ADDSARG() \ 851 ((flags & LONGINT) ? ADDTYPE(T_LONG) : \ 852 ((flags & SHORTINT) ? ADDTYPE(T_SHORT) : ADDTYPE(T_INT))) 853 854 #define ADDUARG() \ 855 ((flags & LONGINT) ? ADDTYPE(T_U_LONG) : \ 856 ((flags & SHORTINT) ? ADDTYPE(T_U_SHORT) : ADDTYPE(T_U_INT))) 857 858 /* Add * arguments to the type array. */ 859 #define ADDASTER() \ 860 n2 = 0; \ 861 cp = fmt; \ 862 while (is_digit(*cp)) \ 863 { \ 864 n2 = 10 * n2 + to_digit(*cp); \ 865 cp++; \ 866 } \ 867 if (*cp == '$') \ 868 { \ 869 int hold = nextarg; \ 870 nextarg = n2; \ 871 ADDTYPE (T_INT); \ 872 nextarg = hold; \ 873 fmt = ++cp; \ 874 } \ 875 else \ 876 { \ 877 ADDTYPE (T_INT); \ 878 } 879 fmt = (char *) fmt0; 880 typetable = stattypetable; 881 tablesize = STATIC_ARG_TBL_SIZE; 882 tablemax = 0; 883 nextarg = 1; 884 (void) memset(typetable, T_UNUSED, STATIC_ARG_TBL_SIZE); 885 886 /* Scan the format for conversions (`%' character). */ 887 for (;;) 888 { 889 for (cp = fmt; (ch = *fmt) != '\0' && ch != '%'; fmt++) 890 /* void */; 891 if (ch == '\0') 892 goto done; 893 fmt++; /* skip over '%' */ 894 895 flags = 0; 896 897 rflag: ch = *fmt++; 898 reswitch: switch (ch) 899 { 900 case ' ': 901 case '#': 902 goto rflag; 903 case '*': 904 ADDASTER(); 905 goto rflag; 906 case '-': 907 case '+': 908 goto rflag; 909 case '.': 910 if ((ch = *fmt++) == '*') 911 { 912 ADDASTER(); 913 goto rflag; 914 } 915 while (is_digit(ch)) 916 { 917 ch = *fmt++; 918 } 919 goto reswitch; 920 case '0': 921 goto rflag; 922 case '1': case '2': case '3': case '4': 923 case '5': case '6': case '7': case '8': case '9': 924 n = 0; 925 do 926 { 927 n = 10 * n + to_digit(ch); 928 ch = *fmt++; 929 } while (is_digit(ch)); 930 if (ch == '$') 931 { 932 nextarg = n; 933 goto rflag; 934 } 935 goto reswitch; 936 case 'h': 937 flags |= SHORTINT; 938 goto rflag; 939 case 'l': 940 flags |= LONGINT; 941 goto rflag; 942 case 'q': 943 flags |= QUADINT; 944 goto rflag; 945 case 'c': 946 ADDTYPE(T_INT); 947 break; 948 case 'D': 949 flags |= LONGINT; 950 /*FALLTHROUGH*/ 951 case 'd': 952 case 'i': 953 if (flags & QUADINT) 954 { 955 ADDTYPE(T_QUAD); 956 } 957 else 958 { 959 ADDSARG(); 960 } 961 break; 962 case 'e': 963 case 'E': 964 case 'f': 965 case 'g': 966 case 'G': 967 ADDTYPE(T_DOUBLE); 968 break; 969 case 'n': 970 if (flags & QUADINT) 971 ADDTYPE(TP_QUAD); 972 else if (flags & LONGINT) 973 ADDTYPE(TP_LONG); 974 else if (flags & SHORTINT) 975 ADDTYPE(TP_SHORT); 976 else 977 ADDTYPE(TP_INT); 978 continue; /* no output */ 979 case 'O': 980 flags |= LONGINT; 981 /*FALLTHROUGH*/ 982 case 'o': 983 if (flags & QUADINT) 984 ADDTYPE(T_U_QUAD); 985 else 986 ADDUARG(); 987 break; 988 case 'p': 989 ADDTYPE(TP_VOID); 990 break; 991 case 's': 992 ADDTYPE(TP_CHAR); 993 break; 994 case 'U': 995 flags |= LONGINT; 996 /*FALLTHROUGH*/ 997 case 'u': 998 if (flags & QUADINT) 999 ADDTYPE(T_U_QUAD); 1000 else 1001 ADDUARG(); 1002 break; 1003 case 'X': 1004 case 'x': 1005 if (flags & QUADINT) 1006 ADDTYPE(T_U_QUAD); 1007 else 1008 ADDUARG(); 1009 break; 1010 default: /* "%?" prints ?, unless ? is NUL */ 1011 if (ch == '\0') 1012 goto done; 1013 break; 1014 } 1015 } 1016 done: 1017 /* Build the argument table. */ 1018 if (tablemax >= STATIC_ARG_TBL_SIZE) 1019 { 1020 *argtable = (va_list *) 1021 sm_malloc(sizeof(va_list) * (tablemax + 1)); 1022 } 1023 1024 for (n = 1; n <= tablemax; n++) 1025 { 1026 SM_VA_COPY((*argtable)[n], ap); 1027 switch (typetable [n]) 1028 { 1029 case T_UNUSED: 1030 (void) SM_VA_ARG(ap, int); 1031 break; 1032 case T_SHORT: 1033 (void) SM_VA_ARG(ap, int); 1034 break; 1035 case T_U_SHORT: 1036 (void) SM_VA_ARG(ap, int); 1037 break; 1038 case TP_SHORT: 1039 (void) SM_VA_ARG(ap, short *); 1040 break; 1041 case T_INT: 1042 (void) SM_VA_ARG(ap, int); 1043 break; 1044 case T_U_INT: 1045 (void) SM_VA_ARG(ap, unsigned int); 1046 break; 1047 case TP_INT: 1048 (void) SM_VA_ARG(ap, int *); 1049 break; 1050 case T_LONG: 1051 (void) SM_VA_ARG(ap, long); 1052 break; 1053 case T_U_LONG: 1054 (void) SM_VA_ARG(ap, unsigned long); 1055 break; 1056 case TP_LONG: 1057 (void) SM_VA_ARG(ap, long *); 1058 break; 1059 case T_QUAD: 1060 (void) SM_VA_ARG(ap, LONGLONG_T); 1061 break; 1062 case T_U_QUAD: 1063 (void) SM_VA_ARG(ap, ULONGLONG_T); 1064 break; 1065 case TP_QUAD: 1066 (void) SM_VA_ARG(ap, LONGLONG_T *); 1067 break; 1068 case T_DOUBLE: 1069 (void) SM_VA_ARG(ap, double); 1070 break; 1071 case TP_CHAR: 1072 (void) SM_VA_ARG(ap, char *); 1073 break; 1074 case TP_VOID: 1075 (void) SM_VA_ARG(ap, void *); 1076 break; 1077 } 1078 } 1079 1080 if ((typetable != NULL) && (typetable != stattypetable)) 1081 sm_free(typetable); 1082 } 1083 1084 /* 1085 ** SM_GROW_TYPE_TABLE -- Increase the size of the type table. 1086 ** 1087 ** Parameters: 1088 ** tabletype -- type of table to grow 1089 ** tablesize -- requested new table size 1090 ** 1091 ** Results: 1092 ** Raises an exception if can't allocate memory. 1093 */ 1094 1095 static void 1096 sm_grow_type_table_x(typetable, tablesize) 1097 unsigned char **typetable; 1098 int *tablesize; 1099 { 1100 unsigned char *oldtable = *typetable; 1101 int newsize = *tablesize * 2; 1102 1103 if (*tablesize == STATIC_ARG_TBL_SIZE) 1104 { 1105 *typetable = (unsigned char *) sm_malloc_x(sizeof(unsigned char) 1106 * newsize); 1107 (void) memmove(*typetable, oldtable, *tablesize); 1108 } 1109 else 1110 { 1111 *typetable = (unsigned char *) sm_realloc_x(typetable, 1112 sizeof(unsigned char) * newsize); 1113 } 1114 (void) memset(&typetable [*tablesize], T_UNUSED, 1115 (newsize - *tablesize)); 1116 1117 *tablesize = newsize; 1118 } 1119