1 /* $OpenBSD: vfwprintf.c,v 1.23 2023/10/06 16:41:02 millert Exp $ */
2 /*-
3 * Copyright (c) 1990 The Regents of the University of California.
4 * All rights reserved.
5 *
6 * This code is derived from software contributed to Berkeley by
7 * Chris Torek.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 * 3. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 */
33
34 /*
35 * Actual wprintf innards.
36 *
37 * This code is large and complicated...
38 */
39
40 #include <sys/types.h>
41 #include <sys/mman.h>
42
43 #include <errno.h>
44 #include <langinfo.h>
45 #include <limits.h>
46 #include <stdarg.h>
47 #include <stddef.h>
48 #include <stdio.h>
49 #include <stdint.h>
50 #include <stdlib.h>
51 #include <string.h>
52 #include <syslog.h>
53 #include <unistd.h>
54
55 #include "local.h"
56 #include "fvwrite.h"
57
58 union arg {
59 int intarg;
60 unsigned int uintarg;
61 long longarg;
62 unsigned long ulongarg;
63 long long longlongarg;
64 unsigned long long ulonglongarg;
65 ptrdiff_t ptrdiffarg;
66 size_t sizearg;
67 ssize_t ssizearg;
68 intmax_t intmaxarg;
69 uintmax_t uintmaxarg;
70 void *pvoidarg;
71 char *pchararg;
72 signed char *pschararg;
73 short *pshortarg;
74 int *pintarg;
75 long *plongarg;
76 long long *plonglongarg;
77 ptrdiff_t *pptrdiffarg;
78 ssize_t *pssizearg;
79 intmax_t *pintmaxarg;
80 #ifdef FLOATING_POINT
81 double doublearg;
82 long double longdoublearg;
83 #endif
84 wint_t wintarg;
85 wchar_t *pwchararg;
86 };
87
88 static int __find_arguments(const wchar_t *fmt0, va_list ap, union arg **argtable,
89 size_t *argtablesiz);
90 static int __grow_type_table(unsigned char **typetable, int *tablesize);
91
92 /*
93 * Helper function for `fprintf to unbuffered unix file': creates a
94 * temporary buffer. We only work on write-only files; this avoids
95 * worries about ungetc buffers and so forth.
96 */
97 static int
__sbprintf(FILE * fp,const wchar_t * fmt,va_list ap)98 __sbprintf(FILE *fp, const wchar_t *fmt, va_list ap)
99 {
100 int ret;
101 FILE fake;
102 struct __sfileext fakeext;
103 unsigned char buf[BUFSIZ];
104
105 _FILEEXT_SETUP(&fake, &fakeext);
106 /* copy the important variables */
107 fake._flags = fp->_flags & ~__SNBF;
108 fake._file = fp->_file;
109 fake._cookie = fp->_cookie;
110 fake._write = fp->_write;
111
112 /* set up the buffer */
113 fake._bf._base = fake._p = buf;
114 fake._bf._size = fake._w = sizeof(buf);
115 fake._lbfsize = 0; /* not actually used, but Just In Case */
116
117 /* do the work, then copy any error status */
118 ret = __vfwprintf(&fake, fmt, ap);
119 if (ret >= 0 && __sflush(&fake))
120 ret = EOF;
121 if (fake._flags & __SERR)
122 fp->_flags |= __SERR;
123 return (ret);
124 }
125
126 /*
127 * Like __fputwc_unlock, but handles fake string (__SSTR) files properly.
128 * File must already be locked.
129 */
130 static wint_t
__xfputwc(wchar_t wc,FILE * fp)131 __xfputwc(wchar_t wc, FILE *fp)
132 {
133 mbstate_t mbs;
134 char buf[MB_LEN_MAX];
135 struct __suio uio;
136 struct __siov iov;
137 size_t len;
138
139 if ((fp->_flags & __SSTR) == 0)
140 return (__fputwc_unlock(wc, fp));
141
142 bzero(&mbs, sizeof(mbs));
143 len = wcrtomb(buf, wc, &mbs);
144 if (len == (size_t)-1) {
145 fp->_flags |= __SERR;
146 errno = EILSEQ;
147 return (WEOF);
148 }
149 uio.uio_iov = &iov;
150 uio.uio_resid = len;
151 uio.uio_iovcnt = 1;
152 iov.iov_base = buf;
153 iov.iov_len = len;
154 return (__sfvwrite(fp, &uio) != EOF ? (wint_t)wc : WEOF);
155 }
156
157 /*
158 * Convert a multibyte character string argument for the %s format to a wide
159 * string representation. ``prec'' specifies the maximum number of bytes
160 * to output. If ``prec'' is greater than or equal to zero, we can't assume
161 * that the multibyte character string ends in a null character.
162 *
163 * Returns NULL on failure.
164 * To find out what happened check errno for ENOMEM, EILSEQ and EINVAL.
165 */
166 static wchar_t *
__mbsconv(char * mbsarg,int prec)167 __mbsconv(char *mbsarg, int prec)
168 {
169 mbstate_t mbs;
170 wchar_t *convbuf, *wcp;
171 const char *p;
172 size_t insize, nchars, nconv;
173
174 if (mbsarg == NULL)
175 return (NULL);
176
177 /*
178 * Supplied argument is a multibyte string; convert it to wide
179 * characters first.
180 */
181 if (prec >= 0) {
182 /*
183 * String is not guaranteed to be NUL-terminated. Find the
184 * number of characters to print.
185 */
186 p = mbsarg;
187 insize = nchars = nconv = 0;
188 bzero(&mbs, sizeof(mbs));
189 while (nchars != (size_t)prec) {
190 nconv = mbrlen(p, MB_CUR_MAX, &mbs);
191 if (nconv == (size_t)0 || nconv == (size_t)-1 ||
192 nconv == (size_t)-2)
193 break;
194 p += nconv;
195 nchars++;
196 insize += nconv;
197 }
198 if (nconv == (size_t)-1 || nconv == (size_t)-2)
199 return (NULL);
200 } else
201 insize = strlen(mbsarg);
202
203 /*
204 * Allocate buffer for the result and perform the conversion,
205 * converting at most `size' bytes of the input multibyte string to
206 * wide characters for printing.
207 */
208 convbuf = calloc(insize + 1, sizeof(*convbuf));
209 if (convbuf == NULL)
210 return (NULL);
211 wcp = convbuf;
212 p = mbsarg;
213 bzero(&mbs, sizeof(mbs));
214 nconv = 0;
215 while (insize != 0) {
216 nconv = mbrtowc(wcp, p, insize, &mbs);
217 if (nconv == 0 || nconv == (size_t)-1 || nconv == (size_t)-2)
218 break;
219 wcp++;
220 p += nconv;
221 insize -= nconv;
222 }
223 if (nconv == (size_t)-1 || nconv == (size_t)-2) {
224 free(convbuf);
225 return (NULL);
226 }
227 *wcp = '\0';
228
229 return (convbuf);
230 }
231
232 #ifdef FLOATING_POINT
233 #include <float.h>
234 #include <locale.h>
235 #include <math.h>
236 #include "floatio.h"
237 #include "gdtoa.h"
238
239 #define DEFPREC 6
240
241 static int exponent(wchar_t *, int, int);
242 #endif /* FLOATING_POINT */
243
244 /*
245 * The size of the buffer we use as scratch space for integer
246 * conversions, among other things. Technically, we would need the
247 * most space for base 10 conversions with thousands' grouping
248 * characters between each pair of digits. 100 bytes is a
249 * conservative overestimate even for a 128-bit uintmax_t.
250 */
251 #define BUF 100
252
253 #define STATIC_ARG_TBL_SIZE 8 /* Size of static argument table. */
254
255
256 /*
257 * Macros for converting digits to letters and vice versa
258 */
259 #define to_digit(c) ((c) - '0')
260 #define is_digit(c) ((unsigned)to_digit(c) <= 9)
261 #define to_char(n) ((wchar_t)((n) + '0'))
262
263 /*
264 * Flags used during conversion.
265 */
266 #define ALT 0x0001 /* alternate form */
267 #define LADJUST 0x0004 /* left adjustment */
268 #define LONGDBL 0x0008 /* long double */
269 #define LONGINT 0x0010 /* long integer */
270 #define LLONGINT 0x0020 /* long long integer */
271 #define SHORTINT 0x0040 /* short integer */
272 #define ZEROPAD 0x0080 /* zero (as opposed to blank) pad */
273 #define FPT 0x0100 /* Floating point number */
274 #define PTRINT 0x0200 /* (unsigned) ptrdiff_t */
275 #define SIZEINT 0x0400 /* (signed) size_t */
276 #define CHARINT 0x0800 /* 8 bit integer */
277 #define MAXINT 0x1000 /* largest integer size (intmax_t) */
278
279 int
__vfwprintf(FILE * __restrict fp,const wchar_t * __restrict fmt0,__va_list ap)280 __vfwprintf(FILE * __restrict fp, const wchar_t * __restrict fmt0, __va_list ap)
281 {
282 wchar_t *fmt; /* format string */
283 wchar_t ch; /* character from fmt */
284 int n, n2, n3; /* handy integers (short term usage) */
285 wchar_t *cp; /* handy char pointer (short term usage) */
286 int flags; /* flags as above */
287 int ret; /* return value accumulator */
288 int width; /* width from format (%8d), or 0 */
289 int prec; /* precision from format; <0 for N/A */
290 wchar_t sign; /* sign prefix (' ', '+', '-', or \0) */
291 #ifdef FLOATING_POINT
292 /*
293 * We can decompose the printed representation of floating
294 * point numbers into several parts, some of which may be empty:
295 *
296 * [+|-| ] [0x|0X] MMM . NNN [e|E|p|P] [+|-] ZZ
297 * A B ---C--- D E F
298 *
299 * A: 'sign' holds this value if present; '\0' otherwise
300 * B: ox[1] holds the 'x' or 'X'; '\0' if not hexadecimal
301 * C: cp points to the string MMMNNN. Leading and trailing
302 * zeros are not in the string and must be added.
303 * D: expchar holds this character; '\0' if no exponent, e.g. %f
304 * F: at least two digits for decimal, at least one digit for hex
305 */
306 char *decimal_point = NULL;
307 int signflag; /* true if float is negative */
308 union { /* floating point arguments %[aAeEfFgG] */
309 double dbl;
310 long double ldbl;
311 } fparg;
312 int expt; /* integer value of exponent */
313 char expchar; /* exponent character: [eEpP\0] */
314 char *dtoaend; /* pointer to end of converted digits */
315 int expsize; /* character count for expstr */
316 int lead; /* sig figs before decimal or group sep */
317 int ndig; /* actual number of digits returned by dtoa */
318 wchar_t expstr[MAXEXPDIG+2]; /* buffer for exponent string: e+ZZZ */
319 char *dtoaresult = NULL;
320 #endif
321
322 uintmax_t _umax; /* integer arguments %[diouxX] */
323 enum { OCT, DEC, HEX } base; /* base for %[diouxX] conversion */
324 int dprec; /* a copy of prec if %[diouxX], 0 otherwise */
325 int realsz; /* field size expanded by dprec */
326 int size; /* size of converted field or string */
327 const char *xdigs; /* digits for %[xX] conversion */
328 wchar_t buf[BUF]; /* buffer with space for digits of uintmax_t */
329 wchar_t ox[2]; /* space for 0x; ox[1] is either x, X, or \0 */
330 union arg *argtable; /* args, built due to positional arg */
331 union arg statargtable[STATIC_ARG_TBL_SIZE];
332 size_t argtablesiz;
333 int nextarg; /* 1-based argument index */
334 va_list orgap; /* original argument pointer */
335 wchar_t *convbuf; /* buffer for multibyte to wide conversion */
336
337 /*
338 * Choose PADSIZE to trade efficiency vs. size. If larger printf
339 * fields occur frequently, increase PADSIZE and make the initialisers
340 * below longer.
341 */
342 #define PADSIZE 16 /* pad chunk size */
343 static wchar_t blanks[PADSIZE] =
344 {' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' '};
345 static wchar_t zeroes[PADSIZE] =
346 {'0','0','0','0','0','0','0','0','0','0','0','0','0','0','0','0'};
347
348 static const char xdigs_lower[16] = "0123456789abcdef";
349 static const char xdigs_upper[16] = "0123456789ABCDEF";
350
351 /*
352 * BEWARE, these `goto error' on error, PRINT uses 'n3',
353 * PAD uses `n' and 'n3', and PRINTANDPAD uses 'n', 'n2', and 'n3'.
354 */
355 #define PRINT(ptr, len) do { \
356 for (n3 = 0; n3 < (len); n3++) { \
357 if ((__xfputwc((ptr)[n3], fp)) == WEOF) \
358 goto error; \
359 } \
360 } while (0)
361 #define PAD(howmany, with) do { \
362 if ((n = (howmany)) > 0) { \
363 while (n > PADSIZE) { \
364 PRINT(with, PADSIZE); \
365 n -= PADSIZE; \
366 } \
367 PRINT(with, n); \
368 } \
369 } while (0)
370 #define PRINTANDPAD(p, ep, len, with) do { \
371 n2 = (ep) - (p); \
372 if (n2 > (len)) \
373 n2 = (len); \
374 if (n2 > 0) \
375 PRINT((p), n2); \
376 PAD((len) - (n2 > 0 ? n2 : 0), (with)); \
377 } while(0)
378
379 /*
380 * To extend shorts properly, we need both signed and unsigned
381 * argument extraction methods.
382 */
383 #define SARG() \
384 ((intmax_t)(flags&MAXINT ? GETARG(intmax_t) : \
385 flags&LLONGINT ? GETARG(long long) : \
386 flags&LONGINT ? GETARG(long) : \
387 flags&PTRINT ? GETARG(ptrdiff_t) : \
388 flags&SIZEINT ? GETARG(ssize_t) : \
389 flags&SHORTINT ? (short)GETARG(int) : \
390 flags&CHARINT ? (signed char)GETARG(int) : \
391 GETARG(int)))
392 #define UARG() \
393 ((uintmax_t)(flags&MAXINT ? GETARG(uintmax_t) : \
394 flags&LLONGINT ? GETARG(unsigned long long) : \
395 flags&LONGINT ? GETARG(unsigned long) : \
396 flags&PTRINT ? (uintptr_t)GETARG(ptrdiff_t) : /* XXX */ \
397 flags&SIZEINT ? GETARG(size_t) : \
398 flags&SHORTINT ? (unsigned short)GETARG(int) : \
399 flags&CHARINT ? (unsigned char)GETARG(int) : \
400 GETARG(unsigned int)))
401
402 /*
403 * Append a digit to a value and check for overflow.
404 */
405 #define APPEND_DIGIT(val, dig) do { \
406 if ((val) > INT_MAX / 10) \
407 goto overflow; \
408 (val) *= 10; \
409 if ((val) > INT_MAX - to_digit((dig))) \
410 goto overflow; \
411 (val) += to_digit((dig)); \
412 } while (0)
413
414 /*
415 * Get * arguments, including the form *nn$. Preserve the nextarg
416 * that the argument can be gotten once the type is determined.
417 */
418 #define GETASTER(val) \
419 n2 = 0; \
420 cp = fmt; \
421 while (is_digit(*cp)) { \
422 APPEND_DIGIT(n2, *cp); \
423 cp++; \
424 } \
425 if (*cp == '$') { \
426 int hold = nextarg; \
427 if (argtable == NULL) { \
428 argtable = statargtable; \
429 if (__find_arguments(fmt0, orgap, &argtable, \
430 &argtablesiz) == -1) { \
431 ret = -1; \
432 goto error; \
433 } \
434 } \
435 nextarg = n2; \
436 val = GETARG(int); \
437 nextarg = hold; \
438 fmt = ++cp; \
439 } else { \
440 val = GETARG(int); \
441 }
442
443 /*
444 * Get the argument indexed by nextarg. If the argument table is
445 * built, use it to get the argument. If its not, get the next
446 * argument (and arguments must be gotten sequentially).
447 */
448 #define GETARG(type) \
449 ((argtable != NULL) ? *((type*)(&argtable[nextarg++])) : \
450 (nextarg++, va_arg(ap, type)))
451
452 _SET_ORIENTATION(fp, 1);
453 /* sorry, fwprintf(read_only_file, "") returns EOF, not 0 */
454 if (cantwrite(fp))
455 return (EOF);
456
457 /* optimise fwprintf(stderr) (and other unbuffered Unix files) */
458 if ((fp->_flags & (__SNBF|__SWR|__SRW)) == (__SNBF|__SWR) &&
459 fp->_file >= 0)
460 return (__sbprintf(fp, fmt0, ap));
461
462 fmt = (wchar_t *)fmt0;
463 argtable = NULL;
464 nextarg = 1;
465 va_copy(orgap, ap);
466 ret = 0;
467 convbuf = NULL;
468
469 /*
470 * Scan the format for conversions (`%' character).
471 */
472 for (;;) {
473 for (cp = fmt; (ch = *fmt) != '\0' && ch != '%'; fmt++)
474 continue;
475 if (fmt != cp) {
476 ptrdiff_t m = fmt - cp;
477 if (m < 0 || m > INT_MAX - ret)
478 goto overflow;
479 PRINT(cp, m);
480 ret += m;
481 }
482 if (ch == '\0')
483 goto done;
484 fmt++; /* skip over '%' */
485
486 flags = 0;
487 dprec = 0;
488 width = 0;
489 prec = -1;
490 sign = '\0';
491 ox[1] = '\0';
492
493 rflag: ch = *fmt++;
494 reswitch: switch (ch) {
495 case ' ':
496 /*
497 * ``If the space and + flags both appear, the space
498 * flag will be ignored.''
499 * -- ANSI X3J11
500 */
501 if (!sign)
502 sign = ' ';
503 goto rflag;
504 case '#':
505 flags |= ALT;
506 goto rflag;
507 case '\'':
508 /* grouping not implemented */
509 goto rflag;
510 case '*':
511 /*
512 * ``A negative field width argument is taken as a
513 * - flag followed by a positive field width.''
514 * -- ANSI X3J11
515 * They don't exclude field widths read from args.
516 */
517 GETASTER(width);
518 if (width >= 0)
519 goto rflag;
520 if (width == INT_MIN)
521 goto overflow;
522 width = -width;
523 /* FALLTHROUGH */
524 case '-':
525 flags |= LADJUST;
526 goto rflag;
527 case '+':
528 sign = '+';
529 goto rflag;
530 case '.':
531 if ((ch = *fmt++) == '*') {
532 GETASTER(n);
533 prec = n < 0 ? -1 : n;
534 goto rflag;
535 }
536 n = 0;
537 while (is_digit(ch)) {
538 APPEND_DIGIT(n, ch);
539 ch = *fmt++;
540 }
541 if (ch == '$') {
542 nextarg = n;
543 if (argtable == NULL) {
544 argtable = statargtable;
545 if (__find_arguments(fmt0, orgap,
546 &argtable, &argtablesiz) == -1) {
547 ret = -1;
548 goto error;
549 }
550 }
551 goto rflag;
552 }
553 prec = n;
554 goto reswitch;
555 case '0':
556 /*
557 * ``Note that 0 is taken as a flag, not as the
558 * beginning of a field width.''
559 * -- ANSI X3J11
560 */
561 flags |= ZEROPAD;
562 goto rflag;
563 case '1': case '2': case '3': case '4':
564 case '5': case '6': case '7': case '8': case '9':
565 n = 0;
566 do {
567 APPEND_DIGIT(n, ch);
568 ch = *fmt++;
569 } while (is_digit(ch));
570 if (ch == '$') {
571 nextarg = n;
572 if (argtable == NULL) {
573 argtable = statargtable;
574 if (__find_arguments(fmt0, orgap,
575 &argtable, &argtablesiz) == -1) {
576 ret = -1;
577 goto error;
578 }
579 }
580 goto rflag;
581 }
582 width = n;
583 goto reswitch;
584 #ifdef FLOATING_POINT
585 case 'L':
586 flags |= LONGDBL;
587 goto rflag;
588 #endif
589 case 'h':
590 if (*fmt == 'h') {
591 fmt++;
592 flags |= CHARINT;
593 } else {
594 flags |= SHORTINT;
595 }
596 goto rflag;
597 case 'j':
598 flags |= MAXINT;
599 goto rflag;
600 case 'l':
601 if (*fmt == 'l') {
602 fmt++;
603 flags |= LLONGINT;
604 } else {
605 flags |= LONGINT;
606 }
607 goto rflag;
608 case 'q':
609 flags |= LLONGINT;
610 goto rflag;
611 case 't':
612 flags |= PTRINT;
613 goto rflag;
614 case 'z':
615 flags |= SIZEINT;
616 goto rflag;
617 case 'C':
618 flags |= LONGINT;
619 /*FALLTHROUGH*/
620 case 'c':
621 if (flags & LONGINT)
622 *(cp = buf) = (wchar_t)GETARG(wint_t);
623 else
624 *(cp = buf) = (wchar_t)btowc(GETARG(int));
625 size = 1;
626 sign = '\0';
627 break;
628 case 'D':
629 flags |= LONGINT;
630 /*FALLTHROUGH*/
631 case 'd':
632 case 'i':
633 _umax = SARG();
634 if ((intmax_t)_umax < 0) {
635 _umax = -_umax;
636 sign = '-';
637 }
638 base = DEC;
639 goto number;
640 #ifdef FLOATING_POINT
641 case 'a':
642 case 'A':
643 if (ch == 'a') {
644 ox[1] = 'x';
645 xdigs = xdigs_lower;
646 expchar = 'p';
647 } else {
648 ox[1] = 'X';
649 xdigs = xdigs_upper;
650 expchar = 'P';
651 }
652 if (prec >= 0)
653 prec++;
654 if (dtoaresult)
655 __freedtoa(dtoaresult);
656 if (flags & LONGDBL) {
657 fparg.ldbl = GETARG(long double);
658 dtoaresult =
659 __hldtoa(fparg.ldbl, xdigs, prec,
660 &expt, &signflag, &dtoaend);
661 if (dtoaresult == NULL) {
662 errno = ENOMEM;
663 goto error;
664 }
665 } else {
666 fparg.dbl = GETARG(double);
667 dtoaresult =
668 __hdtoa(fparg.dbl, xdigs, prec,
669 &expt, &signflag, &dtoaend);
670 if (dtoaresult == NULL) {
671 errno = ENOMEM;
672 goto error;
673 }
674 }
675 if (prec < 0)
676 prec = dtoaend - dtoaresult;
677 if (expt == INT_MAX)
678 ox[1] = '\0';
679 free(convbuf);
680 cp = convbuf = __mbsconv(dtoaresult, -1);
681 if (cp == NULL)
682 goto error;
683 ndig = dtoaend - dtoaresult;
684 goto fp_common;
685 case 'e':
686 case 'E':
687 expchar = ch;
688 if (prec < 0) /* account for digit before decpt */
689 prec = DEFPREC + 1;
690 else
691 prec++;
692 goto fp_begin;
693 case 'f':
694 case 'F':
695 expchar = '\0';
696 goto fp_begin;
697 case 'g':
698 case 'G':
699 expchar = ch - ('g' - 'e');
700 if (prec == 0)
701 prec = 1;
702 fp_begin:
703 if (prec < 0)
704 prec = DEFPREC;
705 if (dtoaresult)
706 __freedtoa(dtoaresult);
707 if (flags & LONGDBL) {
708 fparg.ldbl = GETARG(long double);
709 dtoaresult =
710 __ldtoa(&fparg.ldbl, expchar ? 2 : 3, prec,
711 &expt, &signflag, &dtoaend);
712 if (dtoaresult == NULL) {
713 errno = ENOMEM;
714 goto error;
715 }
716 } else {
717 fparg.dbl = GETARG(double);
718 dtoaresult =
719 __dtoa(fparg.dbl, expchar ? 2 : 3, prec,
720 &expt, &signflag, &dtoaend);
721 if (dtoaresult == NULL) {
722 errno = ENOMEM;
723 goto error;
724 }
725 if (expt == 9999)
726 expt = INT_MAX;
727 }
728 free(convbuf);
729 cp = convbuf = __mbsconv(dtoaresult, -1);
730 if (cp == NULL)
731 goto error;
732 ndig = dtoaend - dtoaresult;
733 fp_common:
734 if (signflag)
735 sign = '-';
736 if (expt == INT_MAX) { /* inf or nan */
737 if (*cp == 'N')
738 cp = (ch >= 'a') ? L"nan" : L"NAN";
739 else
740 cp = (ch >= 'a') ? L"inf" : L"INF";
741 size = 3;
742 flags &= ~ZEROPAD;
743 break;
744 }
745 flags |= FPT;
746 if (ch == 'g' || ch == 'G') {
747 if (expt > -4 && expt <= prec) {
748 /* Make %[gG] smell like %[fF] */
749 expchar = '\0';
750 if (flags & ALT)
751 prec -= expt;
752 else
753 prec = ndig - expt;
754 if (prec < 0)
755 prec = 0;
756 } else {
757 /*
758 * Make %[gG] smell like %[eE], but
759 * trim trailing zeroes if no # flag.
760 */
761 if (!(flags & ALT))
762 prec = ndig;
763 }
764 }
765 if (expchar) {
766 expsize = exponent(expstr, expt - 1, expchar);
767 size = expsize + prec;
768 if (prec > 1 || flags & ALT)
769 ++size;
770 } else {
771 /* space for digits before decimal point */
772 if (expt > 0)
773 size = expt;
774 else /* "0" */
775 size = 1;
776 /* space for decimal pt and following digits */
777 if (prec || flags & ALT)
778 size += prec + 1;
779 lead = expt;
780 }
781 break;
782 #endif /* FLOATING_POINT */
783 case 'n': {
784 static const char n_msg[] = ": *wprintf used %n, aborting";
785 char buf[1024], *p;
786
787 /* <10> is LOG_CRIT */
788 strlcpy(buf, "<10>", sizeof buf);
789
790 /* Make sure progname does not fill the whole buffer */
791 strlcat(buf, __progname, sizeof(buf) - sizeof n_msg);
792 strlcat(buf, n_msg, sizeof buf);
793 /*
794 * vfprintf sends fmt0 via syslog, but this is not
795 * good behaviour for wide strings.
796 */
797 if ((p = strchr(buf, '\n')))
798 *p = '\0';
799 sendsyslog(buf, strlen(buf), LOG_CONS);
800 abort();
801 break;
802 }
803 case 'O':
804 flags |= LONGINT;
805 /*FALLTHROUGH*/
806 case 'o':
807 _umax = UARG();
808 base = OCT;
809 goto nosign;
810 case 'p':
811 /*
812 * ``The argument shall be a pointer to void. The
813 * value of the pointer is converted to a sequence
814 * of printable characters, in an implementation-
815 * defined manner.''
816 * -- ANSI X3J11
817 */
818 _umax = (u_long)GETARG(void *);
819 base = HEX;
820 xdigs = xdigs_lower;
821 ox[1] = 'x';
822 goto nosign;
823 case 'S':
824 flags |= LONGINT;
825 /*FALLTHROUGH*/
826 case 's':
827 if (flags & LONGINT) {
828 if ((cp = GETARG(wchar_t *)) == NULL) {
829 struct syslog_data sdata = SYSLOG_DATA_INIT;
830 int save_errno = errno;
831
832 syslog_r(LOG_CRIT | LOG_CONS, &sdata,
833 "vfwprintf %%ls NULL in \"%ls\"", fmt0);
834 errno = save_errno;
835
836 cp = L"(null)";
837 }
838 } else {
839 char *mbsarg;
840 if ((mbsarg = GETARG(char *)) == NULL) {
841 struct syslog_data sdata = SYSLOG_DATA_INIT;
842 int save_errno = errno;
843
844 syslog_r(LOG_CRIT | LOG_CONS, &sdata,
845 "vfwprintf %%s NULL in \"%ls\"", fmt0);
846 errno = save_errno;
847
848 mbsarg = "(null)";
849 }
850 free(convbuf);
851 convbuf = __mbsconv(mbsarg, prec);
852 if (convbuf == NULL) {
853 fp->_flags |= __SERR;
854 goto error;
855 } else
856 cp = convbuf;
857 }
858 if (prec >= 0) {
859 /*
860 * can't use wcslen; can only look for the
861 * NUL in the first `prec' characters, and
862 * wcslen() will go further.
863 */
864 wchar_t *p = wmemchr(cp, 0, prec);
865
866 size = p ? (p - cp) : prec;
867 } else {
868 size_t len;
869
870 if ((len = wcslen(cp)) > INT_MAX)
871 goto overflow;
872 size = (int)len;
873 }
874 sign = '\0';
875 break;
876 case 'U':
877 flags |= LONGINT;
878 /*FALLTHROUGH*/
879 case 'u':
880 _umax = UARG();
881 base = DEC;
882 goto nosign;
883 case 'X':
884 xdigs = xdigs_upper;
885 goto hex;
886 case 'x':
887 xdigs = xdigs_lower;
888 hex: _umax = UARG();
889 base = HEX;
890 /* leading 0x/X only if non-zero */
891 if (flags & ALT && _umax != 0)
892 ox[1] = ch;
893
894 /* unsigned conversions */
895 nosign: sign = '\0';
896 /*
897 * ``... diouXx conversions ... if a precision is
898 * specified, the 0 flag will be ignored.''
899 * -- ANSI X3J11
900 */
901 number: if ((dprec = prec) >= 0)
902 flags &= ~ZEROPAD;
903
904 /*
905 * ``The result of converting a zero value with an
906 * explicit precision of zero is no characters.''
907 * -- ANSI X3J11
908 */
909 cp = buf + BUF;
910 if (_umax != 0 || prec != 0) {
911 /*
912 * Unsigned mod is hard, and unsigned mod
913 * by a constant is easier than that by
914 * a variable; hence this switch.
915 */
916 switch (base) {
917 case OCT:
918 do {
919 *--cp = to_char(_umax & 7);
920 _umax >>= 3;
921 } while (_umax);
922 /* handle octal leading 0 */
923 if (flags & ALT && *cp != '0')
924 *--cp = '0';
925 break;
926
927 case DEC:
928 /* many numbers are 1 digit */
929 while (_umax >= 10) {
930 *--cp = to_char(_umax % 10);
931 _umax /= 10;
932 }
933 *--cp = to_char(_umax);
934 break;
935
936 case HEX:
937 do {
938 *--cp = xdigs[_umax & 15];
939 _umax >>= 4;
940 } while (_umax);
941 break;
942
943 default:
944 cp = L"bug in vfwprintf: bad base";
945 size = wcslen(cp);
946 goto skipsize;
947 }
948 }
949 size = buf + BUF - cp;
950 if (size > BUF) /* should never happen */
951 abort();
952 skipsize:
953 break;
954 default: /* "%?" prints ?, unless ? is NUL */
955 if (ch == '\0')
956 goto done;
957 /* pretend it was %c with argument ch */
958 cp = buf;
959 *cp = ch;
960 size = 1;
961 sign = '\0';
962 break;
963 }
964
965 /*
966 * All reasonable formats wind up here. At this point, `cp'
967 * points to a string which (if not flags&LADJUST) should be
968 * padded out to `width' places. If flags&ZEROPAD, it should
969 * first be prefixed by any sign or other prefix; otherwise,
970 * it should be blank padded before the prefix is emitted.
971 * After any left-hand padding and prefixing, emit zeroes
972 * required by a decimal %[diouxX] precision, then print the
973 * string proper, then emit zeroes required by any leftover
974 * floating precision; finally, if LADJUST, pad with blanks.
975 *
976 * Compute actual size, so we know how much to pad.
977 * size excludes decimal prec; realsz includes it.
978 */
979 realsz = dprec > size ? dprec : size;
980 if (sign)
981 realsz++;
982 if (ox[1])
983 realsz+= 2;
984
985 /* right-adjusting blank padding */
986 if ((flags & (LADJUST|ZEROPAD)) == 0)
987 PAD(width - realsz, blanks);
988
989 /* prefix */
990 if (sign)
991 PRINT(&sign, 1);
992 if (ox[1]) { /* ox[1] is either x, X, or \0 */
993 ox[0] = '0';
994 PRINT(ox, 2);
995 }
996
997 /* right-adjusting zero padding */
998 if ((flags & (LADJUST|ZEROPAD)) == ZEROPAD)
999 PAD(width - realsz, zeroes);
1000
1001 /* leading zeroes from decimal precision */
1002 PAD(dprec - size, zeroes);
1003
1004 /* the string or number proper */
1005 #ifdef FLOATING_POINT
1006 if ((flags & FPT) == 0) {
1007 PRINT(cp, size);
1008 } else { /* glue together f_p fragments */
1009 if (decimal_point == NULL)
1010 decimal_point = nl_langinfo(RADIXCHAR);
1011 if (!expchar) { /* %[fF] or sufficiently short %[gG] */
1012 if (expt <= 0) {
1013 PRINT(zeroes, 1);
1014 if (prec || flags & ALT)
1015 PRINT(decimal_point, 1);
1016 PAD(-expt, zeroes);
1017 /* already handled initial 0's */
1018 prec += expt;
1019 } else {
1020 PRINTANDPAD(cp, convbuf + ndig,
1021 lead, zeroes);
1022 cp += lead;
1023 if (prec || flags & ALT)
1024 PRINT(decimal_point, 1);
1025 }
1026 PRINTANDPAD(cp, convbuf + ndig, prec, zeroes);
1027 } else { /* %[eE] or sufficiently long %[gG] */
1028 if (prec > 1 || flags & ALT) {
1029 buf[0] = *cp++;
1030 buf[1] = *decimal_point;
1031 PRINT(buf, 2);
1032 PRINT(cp, ndig-1);
1033 PAD(prec - ndig, zeroes);
1034 } else { /* XeYYY */
1035 PRINT(cp, 1);
1036 }
1037 PRINT(expstr, expsize);
1038 }
1039 }
1040 #else
1041 PRINT(cp, size);
1042 #endif
1043 /* left-adjusting padding (always blank) */
1044 if (flags & LADJUST)
1045 PAD(width - realsz, blanks);
1046
1047 /* finally, adjust ret */
1048 if (width < realsz)
1049 width = realsz;
1050 if (width > INT_MAX - ret)
1051 goto overflow;
1052 ret += width;
1053 }
1054 done:
1055 error:
1056 va_end(orgap);
1057 if (__sferror(fp))
1058 ret = -1;
1059 goto finish;
1060
1061 overflow:
1062 errno = ENOMEM;
1063 ret = -1;
1064
1065 finish:
1066 free(convbuf);
1067 #ifdef FLOATING_POINT
1068 if (dtoaresult)
1069 __freedtoa(dtoaresult);
1070 #endif
1071 if (argtable != NULL && argtable != statargtable) {
1072 munmap(argtable, argtablesiz);
1073 argtable = NULL;
1074 }
1075 return (ret);
1076 }
1077
1078 int
vfwprintf(FILE * __restrict fp,const wchar_t * __restrict fmt0,__va_list ap)1079 vfwprintf(FILE * __restrict fp, const wchar_t * __restrict fmt0, __va_list ap)
1080 {
1081 int r;
1082
1083 FLOCKFILE(fp);
1084 r = __vfwprintf(fp, fmt0, ap);
1085 FUNLOCKFILE(fp);
1086
1087 return (r);
1088 }
1089 DEF_STRONG(vfwprintf);
1090
1091 /*
1092 * Type ids for argument type table.
1093 */
1094 #define T_UNUSED 0
1095 #define T_SHORT 1
1096 #define T_U_SHORT 2
1097 #define TP_SHORT 3
1098 #define T_INT 4
1099 #define T_U_INT 5
1100 #define TP_INT 6
1101 #define T_LONG 7
1102 #define T_U_LONG 8
1103 #define TP_LONG 9
1104 #define T_LLONG 10
1105 #define T_U_LLONG 11
1106 #define TP_LLONG 12
1107 #define T_DOUBLE 13
1108 #define T_LONG_DOUBLE 14
1109 #define TP_CHAR 15
1110 #define TP_VOID 16
1111 #define T_PTRINT 17
1112 #define TP_PTRINT 18
1113 #define T_SIZEINT 19
1114 #define T_SSIZEINT 20
1115 #define TP_SSIZEINT 21
1116 #define T_MAXINT 22
1117 #define T_MAXUINT 23
1118 #define TP_MAXINT 24
1119 #define T_CHAR 25
1120 #define T_U_CHAR 26
1121 #define T_WINT 27
1122 #define TP_WCHAR 28
1123
1124 /*
1125 * Find all arguments when a positional parameter is encountered. Returns a
1126 * table, indexed by argument number, of pointers to each arguments. The
1127 * initial argument table should be an array of STATIC_ARG_TBL_SIZE entries.
1128 * It will be replaced with a mmap-ed one if it overflows (malloc cannot be
1129 * used since we are attempting to make snprintf thread safe, and alloca is
1130 * problematic since we have nested functions..)
1131 */
1132 static int
__find_arguments(const wchar_t * fmt0,va_list ap,union arg ** argtable,size_t * argtablesiz)1133 __find_arguments(const wchar_t *fmt0, va_list ap, union arg **argtable,
1134 size_t *argtablesiz)
1135 {
1136 wchar_t *fmt; /* format string */
1137 int ch; /* character from fmt */
1138 int n, n2; /* handy integer (short term usage) */
1139 wchar_t *cp; /* handy char pointer (short term usage) */
1140 int flags; /* flags as above */
1141 unsigned char *typetable; /* table of types */
1142 unsigned char stattypetable[STATIC_ARG_TBL_SIZE];
1143 int tablesize; /* current size of type table */
1144 int tablemax; /* largest used index in table */
1145 int nextarg; /* 1-based argument index */
1146 int ret = 0; /* return value */
1147
1148 /*
1149 * Add an argument type to the table, expanding if necessary.
1150 */
1151 #define ADDTYPE(type) \
1152 ((nextarg >= tablesize) ? \
1153 __grow_type_table(&typetable, &tablesize) : 0, \
1154 (nextarg > tablemax) ? tablemax = nextarg : 0, \
1155 typetable[nextarg++] = type)
1156
1157 #define ADDSARG() \
1158 ((flags&MAXINT) ? ADDTYPE(T_MAXINT) : \
1159 ((flags&PTRINT) ? ADDTYPE(T_PTRINT) : \
1160 ((flags&SIZEINT) ? ADDTYPE(T_SSIZEINT) : \
1161 ((flags&LLONGINT) ? ADDTYPE(T_LLONG) : \
1162 ((flags&LONGINT) ? ADDTYPE(T_LONG) : \
1163 ((flags&SHORTINT) ? ADDTYPE(T_SHORT) : \
1164 ((flags&CHARINT) ? ADDTYPE(T_CHAR) : ADDTYPE(T_INT))))))))
1165
1166 #define ADDUARG() \
1167 ((flags&MAXINT) ? ADDTYPE(T_MAXUINT) : \
1168 ((flags&PTRINT) ? ADDTYPE(T_PTRINT) : \
1169 ((flags&SIZEINT) ? ADDTYPE(T_SIZEINT) : \
1170 ((flags&LLONGINT) ? ADDTYPE(T_U_LLONG) : \
1171 ((flags&LONGINT) ? ADDTYPE(T_U_LONG) : \
1172 ((flags&SHORTINT) ? ADDTYPE(T_U_SHORT) : \
1173 ((flags&CHARINT) ? ADDTYPE(T_U_CHAR) : ADDTYPE(T_U_INT))))))))
1174
1175 /*
1176 * Add * arguments to the type array.
1177 */
1178 #define ADDASTER() \
1179 n2 = 0; \
1180 cp = fmt; \
1181 while (is_digit(*cp)) { \
1182 APPEND_DIGIT(n2, *cp); \
1183 cp++; \
1184 } \
1185 if (*cp == '$') { \
1186 int hold = nextarg; \
1187 nextarg = n2; \
1188 ADDTYPE(T_INT); \
1189 nextarg = hold; \
1190 fmt = ++cp; \
1191 } else { \
1192 ADDTYPE(T_INT); \
1193 }
1194 fmt = (wchar_t *)fmt0;
1195 typetable = stattypetable;
1196 tablesize = STATIC_ARG_TBL_SIZE;
1197 tablemax = 0;
1198 nextarg = 1;
1199 memset(typetable, T_UNUSED, STATIC_ARG_TBL_SIZE);
1200
1201 /*
1202 * Scan the format for conversions (`%' character).
1203 */
1204 for (;;) {
1205 for (cp = fmt; (ch = *fmt) != '\0' && ch != '%'; fmt++)
1206 continue;
1207 if (ch == '\0')
1208 goto done;
1209 fmt++; /* skip over '%' */
1210
1211 flags = 0;
1212
1213 rflag: ch = *fmt++;
1214 reswitch: switch (ch) {
1215 case ' ':
1216 case '#':
1217 case '\'':
1218 goto rflag;
1219 case '*':
1220 ADDASTER();
1221 goto rflag;
1222 case '-':
1223 case '+':
1224 goto rflag;
1225 case '.':
1226 if ((ch = *fmt++) == '*') {
1227 ADDASTER();
1228 goto rflag;
1229 }
1230 while (is_digit(ch)) {
1231 ch = *fmt++;
1232 }
1233 goto reswitch;
1234 case '0':
1235 goto rflag;
1236 case '1': case '2': case '3': case '4':
1237 case '5': case '6': case '7': case '8': case '9':
1238 n = 0;
1239 do {
1240 APPEND_DIGIT(n ,ch);
1241 ch = *fmt++;
1242 } while (is_digit(ch));
1243 if (ch == '$') {
1244 nextarg = n;
1245 goto rflag;
1246 }
1247 goto reswitch;
1248 #ifdef FLOATING_POINT
1249 case 'L':
1250 flags |= LONGDBL;
1251 goto rflag;
1252 #endif
1253 case 'h':
1254 if (*fmt == 'h') {
1255 fmt++;
1256 flags |= CHARINT;
1257 } else {
1258 flags |= SHORTINT;
1259 }
1260 goto rflag;
1261 case 'l':
1262 if (*fmt == 'l') {
1263 fmt++;
1264 flags |= LLONGINT;
1265 } else {
1266 flags |= LONGINT;
1267 }
1268 goto rflag;
1269 case 'q':
1270 flags |= LLONGINT;
1271 goto rflag;
1272 case 't':
1273 flags |= PTRINT;
1274 goto rflag;
1275 case 'z':
1276 flags |= SIZEINT;
1277 goto rflag;
1278 case 'C':
1279 flags |= LONGINT;
1280 /*FALLTHROUGH*/
1281 case 'c':
1282 if (flags & LONGINT)
1283 ADDTYPE(T_WINT);
1284 else
1285 ADDTYPE(T_INT);
1286 break;
1287 case 'D':
1288 flags |= LONGINT;
1289 /*FALLTHROUGH*/
1290 case 'd':
1291 case 'i':
1292 ADDSARG();
1293 break;
1294 #ifdef FLOATING_POINT
1295 case 'a':
1296 case 'A':
1297 case 'e':
1298 case 'E':
1299 case 'f':
1300 case 'F':
1301 case 'g':
1302 case 'G':
1303 if (flags & LONGDBL)
1304 ADDTYPE(T_LONG_DOUBLE);
1305 else
1306 ADDTYPE(T_DOUBLE);
1307 break;
1308 #endif /* FLOATING_POINT */
1309 case 'n':
1310 if (flags & LLONGINT)
1311 ADDTYPE(TP_LLONG);
1312 else if (flags & LONGINT)
1313 ADDTYPE(TP_LONG);
1314 else if (flags & SHORTINT)
1315 ADDTYPE(TP_SHORT);
1316 else if (flags & PTRINT)
1317 ADDTYPE(TP_PTRINT);
1318 else if (flags & SIZEINT)
1319 ADDTYPE(TP_SSIZEINT);
1320 else if (flags & MAXINT)
1321 ADDTYPE(TP_MAXINT);
1322 else
1323 ADDTYPE(TP_INT);
1324 continue; /* no output */
1325 case 'O':
1326 flags |= LONGINT;
1327 /*FALLTHROUGH*/
1328 case 'o':
1329 ADDUARG();
1330 break;
1331 case 'p':
1332 ADDTYPE(TP_VOID);
1333 break;
1334 case 'S':
1335 flags |= LONGINT;
1336 /*FALLTHROUGH*/
1337 case 's':
1338 if (flags & LONGINT)
1339 ADDTYPE(TP_CHAR);
1340 else
1341 ADDTYPE(TP_WCHAR);
1342 break;
1343 case 'U':
1344 flags |= LONGINT;
1345 /*FALLTHROUGH*/
1346 case 'u':
1347 case 'X':
1348 case 'x':
1349 ADDUARG();
1350 break;
1351 default: /* "%?" prints ?, unless ? is NUL */
1352 if (ch == '\0')
1353 goto done;
1354 break;
1355 }
1356 }
1357 done:
1358 /*
1359 * Build the argument table.
1360 */
1361 if (tablemax >= STATIC_ARG_TBL_SIZE) {
1362 *argtablesiz = sizeof(union arg) * (tablemax + 1);
1363 *argtable = mmap(NULL, *argtablesiz,
1364 PROT_WRITE|PROT_READ, MAP_ANON|MAP_PRIVATE, -1, 0);
1365 if (*argtable == MAP_FAILED)
1366 return (-1);
1367 }
1368
1369 #if 0
1370 /* XXX is this required? */
1371 (*argtable)[0].intarg = 0;
1372 #endif
1373 for (n = 1; n <= tablemax; n++) {
1374 switch (typetable[n]) {
1375 case T_UNUSED:
1376 case T_CHAR:
1377 case T_U_CHAR:
1378 case T_SHORT:
1379 case T_U_SHORT:
1380 case T_INT:
1381 (*argtable)[n].intarg = va_arg(ap, int);
1382 break;
1383 case TP_SHORT:
1384 (*argtable)[n].pshortarg = va_arg(ap, short *);
1385 break;
1386 case T_U_INT:
1387 (*argtable)[n].uintarg = va_arg(ap, unsigned int);
1388 break;
1389 case TP_INT:
1390 (*argtable)[n].pintarg = va_arg(ap, int *);
1391 break;
1392 case T_LONG:
1393 (*argtable)[n].longarg = va_arg(ap, long);
1394 break;
1395 case T_U_LONG:
1396 (*argtable)[n].ulongarg = va_arg(ap, unsigned long);
1397 break;
1398 case TP_LONG:
1399 (*argtable)[n].plongarg = va_arg(ap, long *);
1400 break;
1401 case T_LLONG:
1402 (*argtable)[n].longlongarg = va_arg(ap, long long);
1403 break;
1404 case T_U_LLONG:
1405 (*argtable)[n].ulonglongarg = va_arg(ap, unsigned long long);
1406 break;
1407 case TP_LLONG:
1408 (*argtable)[n].plonglongarg = va_arg(ap, long long *);
1409 break;
1410 #ifdef FLOATING_POINT
1411 case T_DOUBLE:
1412 (*argtable)[n].doublearg = va_arg(ap, double);
1413 break;
1414 case T_LONG_DOUBLE:
1415 (*argtable)[n].longdoublearg = va_arg(ap, long double);
1416 break;
1417 #endif
1418 case TP_CHAR:
1419 (*argtable)[n].pchararg = va_arg(ap, char *);
1420 break;
1421 case TP_VOID:
1422 (*argtable)[n].pvoidarg = va_arg(ap, void *);
1423 break;
1424 case T_PTRINT:
1425 (*argtable)[n].ptrdiffarg = va_arg(ap, ptrdiff_t);
1426 break;
1427 case TP_PTRINT:
1428 (*argtable)[n].pptrdiffarg = va_arg(ap, ptrdiff_t *);
1429 break;
1430 case T_SIZEINT:
1431 (*argtable)[n].sizearg = va_arg(ap, size_t);
1432 break;
1433 case T_SSIZEINT:
1434 (*argtable)[n].ssizearg = va_arg(ap, ssize_t);
1435 break;
1436 case TP_SSIZEINT:
1437 (*argtable)[n].pssizearg = va_arg(ap, ssize_t *);
1438 break;
1439 case TP_MAXINT:
1440 (*argtable)[n].intmaxarg = va_arg(ap, intmax_t);
1441 break;
1442 case T_WINT:
1443 (*argtable)[n].wintarg = va_arg(ap, wint_t);
1444 break;
1445 case TP_WCHAR:
1446 (*argtable)[n].pwchararg = va_arg(ap, wchar_t *);
1447 break;
1448 }
1449 }
1450 goto finish;
1451
1452 overflow:
1453 errno = ENOMEM;
1454 ret = -1;
1455
1456 finish:
1457 if (typetable != NULL && typetable != stattypetable) {
1458 munmap(typetable, *argtablesiz);
1459 typetable = NULL;
1460 }
1461 return (ret);
1462 }
1463
1464 /*
1465 * Increase the size of the type table.
1466 */
1467 static int
__grow_type_table(unsigned char ** typetable,int * tablesize)1468 __grow_type_table(unsigned char **typetable, int *tablesize)
1469 {
1470 unsigned char *oldtable = *typetable;
1471 int newsize = *tablesize * 2;
1472
1473 if (newsize < getpagesize())
1474 newsize = getpagesize();
1475
1476 if (*tablesize == STATIC_ARG_TBL_SIZE) {
1477 *typetable = mmap(NULL, newsize, PROT_WRITE|PROT_READ,
1478 MAP_ANON|MAP_PRIVATE, -1, 0);
1479 if (*typetable == MAP_FAILED)
1480 return (-1);
1481 bcopy(oldtable, *typetable, *tablesize);
1482 } else {
1483 unsigned char *new = mmap(NULL, newsize, PROT_WRITE|PROT_READ,
1484 MAP_ANON|MAP_PRIVATE, -1, 0);
1485 if (new == MAP_FAILED)
1486 return (-1);
1487 memmove(new, *typetable, *tablesize);
1488 munmap(*typetable, *tablesize);
1489 *typetable = new;
1490 }
1491 memset(*typetable + *tablesize, T_UNUSED, (newsize - *tablesize));
1492
1493 *tablesize = newsize;
1494 return (0);
1495 }
1496
1497
1498 #ifdef FLOATING_POINT
1499 static int
exponent(wchar_t * p0,int exp,int fmtch)1500 exponent(wchar_t *p0, int exp, int fmtch)
1501 {
1502 wchar_t *p, *t;
1503 wchar_t expbuf[MAXEXPDIG];
1504
1505 p = p0;
1506 *p++ = fmtch;
1507 if (exp < 0) {
1508 exp = -exp;
1509 *p++ = '-';
1510 } else
1511 *p++ = '+';
1512 t = expbuf + MAXEXPDIG;
1513 if (exp > 9) {
1514 do {
1515 *--t = to_char(exp % 10);
1516 } while ((exp /= 10) > 9);
1517 *--t = to_char(exp);
1518 for (; t < expbuf + MAXEXPDIG; *p++ = *t++)
1519 /* nothing */;
1520 } else {
1521 /*
1522 * Exponents for decimal floating point conversions
1523 * (%[eEgG]) must be at least two characters long,
1524 * whereas exponents for hexadecimal conversions can
1525 * be only one character long.
1526 */
1527 if (fmtch == 'e' || fmtch == 'E')
1528 *p++ = '0';
1529 *p++ = to_char(exp);
1530 }
1531 return (p - p0);
1532 }
1533 #endif /* FLOATING_POINT */
1534