1 /* $OpenBSD: vfwprintf.c,v 1.12 2014/12/21 00:23:30 daniel 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 */
34 /*
35 * Actual wprintf innards.
36 *
37 * This code is large and complicated...
38 */
40 #include <sys/types.h>
41 #include <sys/mman.h>
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 <unistd.h>
54 #include "local.h"
55 #include "fvwrite.h"
57 union arg {
58 int intarg;
59 unsigned int uintarg;
60 long longarg;
61 unsigned long ulongarg;
62 long long longlongarg;
63 unsigned long long ulonglongarg;
64 ptrdiff_t ptrdiffarg;
65 size_t sizearg;
66 ssize_t ssizearg;
67 intmax_t intmaxarg;
68 uintmax_t uintmaxarg;
69 void *pvoidarg;
70 char *pchararg;
71 signed char *pschararg;
72 short *pshortarg;
73 int *pintarg;
74 long *plongarg;
75 long long *plonglongarg;
76 ptrdiff_t *pptrdiffarg;
77 ssize_t *pssizearg;
78 intmax_t *pintmaxarg;
79 #ifdef FLOATING_POINT
80 double doublearg;
81 long double longdoublearg;
82 #endif
83 wint_t wintarg;
84 wchar_t *pwchararg;
85 };
87 static int __find_arguments(const wchar_t *fmt0, va_list ap, union arg **argtable,
88 size_t *argtablesiz);
89 static int __grow_type_table(unsigned char **typetable, int *tablesize);
91 /*
92 * Helper function for `fprintf to unbuffered unix file': creates a
93 * temporary buffer. We only work on write-only files; this avoids
94 * worries about ungetc buffers and so forth.
95 */
96 static int
97 __sbprintf(FILE *fp, const wchar_t *fmt, va_list ap)
98 {
99 int ret;
100 FILE fake;
101 struct __sfileext fakeext;
102 unsigned char buf[BUFSIZ];
104 _FILEEXT_SETUP(&fake, &fakeext);
105 /* copy the important variables */
106 fake._flags = fp->_flags & ~__SNBF;
107 fake._file = fp->_file;
108 fake._cookie = fp->_cookie;
109 fake._write = fp->_write;
111 /* set up the buffer */
112 fake._bf._base = fake._p = buf;
113 fake._bf._size = fake._w = sizeof(buf);
114 fake._lbfsize = 0; /* not actually used, but Just In Case */
116 /* do the work, then copy any error status */
117 ret = __vfwprintf(&fake, fmt, ap);
118 if (ret >= 0 && __sflush(&fake))
119 ret = EOF;
120 if (fake._flags & __SERR)
121 fp->_flags |= __SERR;
122 return (ret);
123 }
125 /*
126 * Like __fputwc_unlock, but handles fake string (__SSTR) files properly.
127 * File must already be locked.
128 */
129 static wint_t
130 __xfputwc(wchar_t wc, FILE *fp)
131 {
132 mbstate_t mbs;
133 char buf[MB_LEN_MAX];
134 struct __suio uio;
135 struct __siov iov;
136 size_t len;
138 if ((fp->_flags & __SSTR) == 0)
139 return (__fputwc_unlock(wc, fp));
141 bzero(&mbs, sizeof(mbs));
142 len = wcrtomb(buf, wc, &mbs);
143 if (len == (size_t)-1) {
144 fp->_flags |= __SERR;
145 errno = EILSEQ;
146 return (WEOF);
147 }
148 uio.uio_iov = &iov;
149 uio.uio_resid = len;
150 uio.uio_iovcnt = 1;
151 iov.iov_base = buf;
152 iov.iov_len = len;
153 return (__sfvwrite(fp, &uio) != EOF ? (wint_t)wc : WEOF);
154 }
156 /*
157 * Convert a multibyte character string argument for the %s format to a wide
158 * string representation. ``prec'' specifies the maximum number of bytes
159 * to output. If ``prec'' is greater than or equal to zero, we can't assume
160 * that the multibyte character string ends in a null character.
161 *
162 * Returns NULL on failure.
163 * To find out what happened check errno for ENOMEM, EILSEQ and EINVAL.
164 */
165 static wchar_t *
166 __mbsconv(char *mbsarg, int prec)
167 {
168 mbstate_t mbs;
169 wchar_t *convbuf, *wcp;
170 const char *p;
171 size_t insize, nchars, nconv;
173 if (mbsarg == NULL)
174 return (NULL);
176 /*
177 * Supplied argument is a multibyte string; convert it to wide
178 * characters first.
179 */
180 if (prec >= 0) {
181 /*
182 * String is not guaranteed to be NUL-terminated. Find the
183 * number of characters to print.
184 */
185 p = mbsarg;
186 insize = nchars = nconv = 0;
187 bzero(&mbs, sizeof(mbs));
188 while (nchars != (size_t)prec) {
189 nconv = mbrlen(p, MB_CUR_MAX, &mbs);
190 if (nconv == (size_t)0 || nconv == (size_t)-1 ||
191 nconv == (size_t)-2)
192 break;
193 p += nconv;
194 nchars++;
195 insize += nconv;
196 }
197 if (nconv == (size_t)-1 || nconv == (size_t)-2)
198 return (NULL);
199 } else
200 insize = strlen(mbsarg);
202 /*
203 * Allocate buffer for the result and perform the conversion,
204 * converting at most `size' bytes of the input multibyte string to
205 * wide characters for printing.
206 */
207 convbuf = calloc(insize + 1, sizeof(*convbuf));
208 if (convbuf == NULL)
209 return (NULL);
210 wcp = convbuf;
211 p = mbsarg;
212 bzero(&mbs, sizeof(mbs));
213 nconv = 0;
214 while (insize != 0) {
215 nconv = mbrtowc(wcp, p, insize, &mbs);
216 if (nconv == 0 || nconv == (size_t)-1 || nconv == (size_t)-2)
217 break;
218 wcp++;
219 p += nconv;
220 insize -= nconv;
221 }
222 if (nconv == (size_t)-1 || nconv == (size_t)-2) {
223 free(convbuf);
224 return (NULL);
225 }
226 *wcp = '\0';
228 return (convbuf);
229 }
231 #ifdef FLOATING_POINT
232 #include <float.h>
233 #include <locale.h>
234 #include <math.h>
235 #include "floatio.h"
236 #include "gdtoa.h"
238 #define DEFPREC 6
240 static int exponent(wchar_t *, int, int);
241 #endif /* FLOATING_POINT */
243 /*
244 * The size of the buffer we use as scratch space for integer
245 * conversions, among other things. Technically, we would need the
246 * most space for base 10 conversions with thousands' grouping
247 * characters between each pair of digits. 100 bytes is a
248 * conservative overestimate even for a 128-bit uintmax_t.
249 */
250 #define BUF 100
252 #define STATIC_ARG_TBL_SIZE 8 /* Size of static argument table. */
255 /*
256 * Macros for converting digits to letters and vice versa
257 */
258 #define to_digit(c) ((c) - '0')
259 #define is_digit(c) ((unsigned)to_digit(c) <= 9)
260 #define to_char(n) ((wchar_t)((n) + '0'))
262 /*
263 * Flags used during conversion.
264 */
265 #define ALT 0x0001 /* alternate form */
266 #define LADJUST 0x0004 /* left adjustment */
267 #define LONGDBL 0x0008 /* long double */
268 #define LONGINT 0x0010 /* long integer */
269 #define LLONGINT 0x0020 /* long long integer */
270 #define SHORTINT 0x0040 /* short integer */
271 #define ZEROPAD 0x0080 /* zero (as opposed to blank) pad */
272 #define FPT 0x0100 /* Floating point number */
273 #define PTRINT 0x0200 /* (unsigned) ptrdiff_t */
274 #define SIZEINT 0x0400 /* (signed) size_t */
275 #define CHARINT 0x0800 /* 8 bit integer */
276 #define MAXINT 0x1000 /* largest integer size (intmax_t) */
278 int
279 __vfwprintf(FILE * __restrict fp, const wchar_t * __restrict fmt0, __va_list ap)
280 {
281 wchar_t *fmt; /* format string */
282 wchar_t ch; /* character from fmt */
283 int n, n2, n3; /* handy integers (short term usage) */
284 wchar_t *cp; /* handy char pointer (short term usage) */
285 int flags; /* flags as above */
286 int ret; /* return value accumulator */
287 int width; /* width from format (%8d), or 0 */
288 int prec; /* precision from format; <0 for N/A */
289 wchar_t sign; /* sign prefix (' ', '+', '-', or \0) */
290 #ifdef FLOATING_POINT
291 /*
292 * We can decompose the printed representation of floating
293 * point numbers into several parts, some of which may be empty:
294 *
295 * [+|-| ] [0x|0X] MMM . NNN [e|E|p|P] [+|-] ZZ
296 * A B ---C--- D E F
297 *
298 * A: 'sign' holds this value if present; '\0' otherwise
299 * B: ox[1] holds the 'x' or 'X'; '\0' if not hexadecimal
300 * C: cp points to the string MMMNNN. Leading and trailing
301 * zeros are not in the string and must be added.
302 * D: expchar holds this character; '\0' if no exponent, e.g. %f
303 * F: at least two digits for decimal, at least one digit for hex
304 */
305 char *decimal_point = NULL;
306 int signflag; /* true if float is negative */
307 union { /* floating point arguments %[aAeEfFgG] */
308 double dbl;
309 long double ldbl;
310 } fparg;
311 int expt; /* integer value of exponent */
312 char expchar; /* exponent character: [eEpP\0] */
313 char *dtoaend; /* pointer to end of converted digits */
314 int expsize; /* character count for expstr */
315 int lead; /* sig figs before decimal or group sep */
316 int ndig; /* actual number of digits returned by dtoa */
317 wchar_t expstr[MAXEXPDIG+2]; /* buffer for exponent string: e+ZZZ */
318 char *dtoaresult = NULL;
319 #endif
321 uintmax_t _umax; /* integer arguments %[diouxX] */
322 enum { OCT, DEC, HEX } base; /* base for %[diouxX] conversion */
323 int dprec; /* a copy of prec if %[diouxX], 0 otherwise */
324 int realsz; /* field size expanded by dprec */
325 int size; /* size of converted field or string */
326 const char *xdigs; /* digits for %[xX] conversion */
327 wchar_t buf[BUF]; /* buffer with space for digits of uintmax_t */
328 wchar_t ox[2]; /* space for 0x; ox[1] is either x, X, or \0 */
329 union arg *argtable; /* args, built due to positional arg */
330 union arg statargtable[STATIC_ARG_TBL_SIZE];
331 size_t argtablesiz;
332 int nextarg; /* 1-based argument index */
333 va_list orgap; /* original argument pointer */
334 wchar_t *convbuf; /* buffer for multibyte to wide conversion */
336 /*
337 * Choose PADSIZE to trade efficiency vs. size. If larger printf
338 * fields occur frequently, increase PADSIZE and make the initialisers
339 * below longer.
340 */
341 #define PADSIZE 16 /* pad chunk size */
342 static wchar_t blanks[PADSIZE] =
343 {' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' '};
344 static wchar_t zeroes[PADSIZE] =
345 {'0','0','0','0','0','0','0','0','0','0','0','0','0','0','0','0'};
347 static const char xdigs_lower[16] = "0123456789abcdef";
348 static const char xdigs_upper[16] = "0123456789ABCDEF";
350 /*
351 * BEWARE, these `goto error' on error, PRINT uses 'n3',
352 * PAD uses `n' and 'n3', and PRINTANDPAD uses 'n', 'n2', and 'n3'.
353 */
354 #define PRINT(ptr, len) do { \
355 for (n3 = 0; n3 < (len); n3++) { \
356 if ((__xfputwc((ptr)[n3], fp)) == WEOF) \
357 goto error; \
358 } \
359 } while (0)
360 #define PAD(howmany, with) do { \
361 if ((n = (howmany)) > 0) { \
362 while (n > PADSIZE) { \
363 PRINT(with, PADSIZE); \
364 n -= PADSIZE; \
365 } \
366 PRINT(with, n); \
367 } \
368 } while (0)
369 #define PRINTANDPAD(p, ep, len, with) do { \
370 n2 = (ep) - (p); \
371 if (n2 > (len)) \
372 n2 = (len); \
373 if (n2 > 0) \
374 PRINT((p), n2); \
375 PAD((len) - (n2 > 0 ? n2 : 0), (with)); \
376 } while(0)
378 /*
379 * To extend shorts properly, we need both signed and unsigned
380 * argument extraction methods.
381 */
382 #define SARG() \
383 ((intmax_t)(flags&MAXINT ? GETARG(intmax_t) : \
384 flags&LLONGINT ? GETARG(long long) : \
385 flags&LONGINT ? GETARG(long) : \
386 flags&PTRINT ? GETARG(ptrdiff_t) : \
387 flags&SIZEINT ? GETARG(ssize_t) : \
388 flags&SHORTINT ? (short)GETARG(int) : \
389 flags&CHARINT ? (signed char)GETARG(int) : \
390 GETARG(int)))
391 #define UARG() \
392 ((uintmax_t)(flags&MAXINT ? GETARG(uintmax_t) : \
393 flags&LLONGINT ? GETARG(unsigned long long) : \
394 flags&LONGINT ? GETARG(unsigned long) : \
395 flags&PTRINT ? (uintptr_t)GETARG(ptrdiff_t) : /* XXX */ \
396 flags&SIZEINT ? GETARG(size_t) : \
397 flags&SHORTINT ? (unsigned short)GETARG(int) : \
398 flags&CHARINT ? (unsigned char)GETARG(int) : \
399 GETARG(unsigned int)))
401 /*
402 * Append a digit to a value and check for overflow.
403 */
404 #define APPEND_DIGIT(val, dig) do { \
405 if ((val) > INT_MAX / 10) \
406 goto overflow; \
407 (val) *= 10; \
408 if ((val) > INT_MAX - to_digit((dig))) \
409 goto overflow; \
410 (val) += to_digit((dig)); \
411 } while (0)
413 /*
414 * Get * arguments, including the form *nn$. Preserve the nextarg
415 * that the argument can be gotten once the type is determined.
416 */
417 #define GETASTER(val) \
418 n2 = 0; \
419 cp = fmt; \
420 while (is_digit(*cp)) { \
421 APPEND_DIGIT(n2, *cp); \
422 cp++; \
423 } \
424 if (*cp == '$') { \
425 int hold = nextarg; \
426 if (argtable == NULL) { \
427 argtable = statargtable; \
428 __find_arguments(fmt0, orgap, &argtable, &argtablesiz); \
429 } \
430 nextarg = n2; \
431 val = GETARG(int); \
432 nextarg = hold; \
433 fmt = ++cp; \
434 } else { \
435 val = GETARG(int); \
436 }
438 /*
439 * Get the argument indexed by nextarg. If the argument table is
440 * built, use it to get the argument. If its not, get the next
441 * argument (and arguments must be gotten sequentially).
442 */
443 #define GETARG(type) \
444 ((argtable != NULL) ? *((type*)(&argtable[nextarg++])) : \
445 (nextarg++, va_arg(ap, type)))
447 _SET_ORIENTATION(fp, 1);
448 /* sorry, fwprintf(read_only_file, "") returns EOF, not 0 */
449 if (cantwrite(fp)) {
450 errno = EBADF;
451 return (EOF);
452 }
454 /* optimise fwprintf(stderr) (and other unbuffered Unix files) */
455 if ((fp->_flags & (__SNBF|__SWR|__SRW)) == (__SNBF|__SWR) &&
456 fp->_file >= 0)
457 return (__sbprintf(fp, fmt0, ap));
459 fmt = (wchar_t *)fmt0;
460 argtable = NULL;
461 nextarg = 1;
462 va_copy(orgap, ap);
463 ret = 0;
464 convbuf = NULL;
466 /*
467 * Scan the format for conversions (`%' character).
468 */
469 for (;;) {
470 for (cp = fmt; (ch = *fmt) != '\0' && ch != '%'; fmt++)
471 continue;
472 if (fmt != cp) {
473 ptrdiff_t m = fmt - cp;
474 if (m < 0 || m > INT_MAX - ret)
475 goto overflow;
476 PRINT(cp, m);
477 ret += m;
478 }
479 if (ch == '\0')
480 goto done;
481 fmt++; /* skip over '%' */
483 flags = 0;
484 dprec = 0;
485 width = 0;
486 prec = -1;
487 sign = '\0';
488 ox[1] = '\0';
490 rflag: ch = *fmt++;
491 reswitch: switch (ch) {
492 case ' ':
493 /*
494 * ``If the space and + flags both appear, the space
495 * flag will be ignored.''
496 * -- ANSI X3J11
497 */
498 if (!sign)
499 sign = ' ';
500 goto rflag;
501 case '#':
502 flags |= ALT;
503 goto rflag;
504 case '\'':
505 /* grouping not implemented */
506 goto rflag;
507 case '*':
508 /*
509 * ``A negative field width argument is taken as a
510 * - flag followed by a positive field width.''
511 * -- ANSI X3J11
512 * They don't exclude field widths read from args.
513 */
514 GETASTER(width);
515 if (width >= 0)
516 goto rflag;
517 if (width == INT_MIN)
518 goto overflow;
519 width = -width;
520 /* FALLTHROUGH */
521 case '-':
522 flags |= LADJUST;
523 goto rflag;
524 case '+':
525 sign = '+';
526 goto rflag;
527 case '.':
528 if ((ch = *fmt++) == '*') {
529 GETASTER(n);
530 prec = n < 0 ? -1 : n;
531 goto rflag;
532 }
533 n = 0;
534 while (is_digit(ch)) {
535 APPEND_DIGIT(n, ch);
536 ch = *fmt++;
537 }
538 if (ch == '$') {
539 nextarg = n;
540 if (argtable == NULL) {
541 argtable = statargtable;
542 __find_arguments(fmt0, orgap,
543 &argtable, &argtablesiz);
544 }
545 goto rflag;
546 }
547 prec = n;
548 goto reswitch;
549 case '0':
550 /*
551 * ``Note that 0 is taken as a flag, not as the
552 * beginning of a field width.''
553 * -- ANSI X3J11
554 */
555 flags |= ZEROPAD;
556 goto rflag;
557 case '1': case '2': case '3': case '4':
558 case '5': case '6': case '7': case '8': case '9':
559 n = 0;
560 do {
561 APPEND_DIGIT(n, ch);
562 ch = *fmt++;
563 } while (is_digit(ch));
564 if (ch == '$') {
565 nextarg = n;
566 if (argtable == NULL) {
567 argtable = statargtable;
568 __find_arguments(fmt0, orgap,
569 &argtable, &argtablesiz);
570 }
571 goto rflag;
572 }
573 width = n;
574 goto reswitch;
575 #ifdef FLOATING_POINT
576 case 'L':
577 flags |= LONGDBL;
578 goto rflag;
579 #endif
580 case 'h':
581 if (*fmt == 'h') {
582 fmt++;
583 flags |= CHARINT;
584 } else {
585 flags |= SHORTINT;
586 }
587 goto rflag;
588 case 'j':
589 flags |= MAXINT;
590 goto rflag;
591 case 'l':
592 if (*fmt == 'l') {
593 fmt++;
594 flags |= LLONGINT;
595 } else {
596 flags |= LONGINT;
597 }
598 goto rflag;
599 case 'q':
600 flags |= LLONGINT;
601 goto rflag;
602 case 't':
603 flags |= PTRINT;
604 goto rflag;
605 case 'z':
606 flags |= SIZEINT;
607 goto rflag;
608 case 'C':
609 flags |= LONGINT;
610 /*FALLTHROUGH*/
611 case 'c':
612 if (flags & LONGINT)
613 *(cp = buf) = (wchar_t)GETARG(wint_t);
614 else
615 *(cp = buf) = (wchar_t)btowc(GETARG(int));
616 size = 1;
617 sign = '\0';
618 break;
619 case 'D':
620 flags |= LONGINT;
621 /*FALLTHROUGH*/
622 case 'd':
623 case 'i':
624 _umax = SARG();
625 if ((intmax_t)_umax < 0) {
626 _umax = -_umax;
627 sign = '-';
628 }
629 base = DEC;
630 goto number;
631 #ifdef FLOATING_POINT
632 case 'a':
633 case 'A':
634 if (ch == 'a') {
635 ox[1] = 'x';
636 xdigs = xdigs_lower;
637 expchar = 'p';
638 } else {
639 ox[1] = 'X';
640 xdigs = xdigs_upper;
641 expchar = 'P';
642 }
643 if (prec >= 0)
644 prec++;
645 if (dtoaresult)
646 __freedtoa(dtoaresult);
647 if (flags & LONGDBL) {
648 fparg.ldbl = GETARG(long double);
649 dtoaresult =
650 __hldtoa(fparg.ldbl, xdigs, prec,
651 &expt, &signflag, &dtoaend);
652 if (dtoaresult == NULL) {
653 errno = ENOMEM;
654 goto error;
655 }
656 } else {
657 fparg.dbl = GETARG(double);
658 dtoaresult =
659 __hdtoa(fparg.dbl, xdigs, prec,
660 &expt, &signflag, &dtoaend);
661 if (dtoaresult == NULL) {
662 errno = ENOMEM;
663 goto error;
664 }
665 }
666 if (prec < 0)
667 prec = dtoaend - dtoaresult;
668 if (expt == INT_MAX)
669 ox[1] = '\0';
670 if (convbuf) {
671 free(convbuf);
672 convbuf = NULL;
673 }
674 cp = convbuf = __mbsconv(dtoaresult, -1);
675 if (cp == NULL)
676 goto error;
677 ndig = dtoaend - dtoaresult;
678 goto fp_common;
679 case 'e':
680 case 'E':
681 expchar = ch;
682 if (prec < 0) /* account for digit before decpt */
683 prec = DEFPREC + 1;
684 else
685 prec++;
686 goto fp_begin;
687 case 'f':
688 case 'F':
689 expchar = '\0';
690 goto fp_begin;
691 case 'g':
692 case 'G':
693 expchar = ch - ('g' - 'e');
694 if (prec == 0)
695 prec = 1;
696 fp_begin:
697 if (prec < 0)
698 prec = DEFPREC;
699 if (dtoaresult)
700 __freedtoa(dtoaresult);
701 if (flags & LONGDBL) {
702 fparg.ldbl = GETARG(long double);
703 dtoaresult =
704 __ldtoa(&fparg.ldbl, expchar ? 2 : 3, prec,
705 &expt, &signflag, &dtoaend);
706 if (dtoaresult == NULL) {
707 errno = ENOMEM;
708 goto error;
709 }
710 } else {
711 fparg.dbl = GETARG(double);
712 dtoaresult =
713 __dtoa(fparg.dbl, expchar ? 2 : 3, prec,
714 &expt, &signflag, &dtoaend);
715 if (dtoaresult == NULL) {
716 errno = ENOMEM;
717 goto error;
718 }
719 if (expt == 9999)
720 expt = INT_MAX;
721 }
722 if (convbuf) {
723 free(convbuf);
724 convbuf = NULL;
725 }
726 cp = convbuf = __mbsconv(dtoaresult, -1);
727 if (cp == NULL)
728 goto error;
729 ndig = dtoaend - dtoaresult;
730 fp_common:
731 if (signflag)
732 sign = '-';
733 if (expt == INT_MAX) { /* inf or nan */
734 if (*cp == 'N')
735 cp = (ch >= 'a') ? L"nan" : L"NAN";
736 else
737 cp = (ch >= 'a') ? L"inf" : L"INF";
738 size = 3;
739 flags &= ~ZEROPAD;
740 break;
741 }
742 flags |= FPT;
743 if (ch == 'g' || ch == 'G') {
744 if (expt > -4 && expt <= prec) {
745 /* Make %[gG] smell like %[fF] */
746 expchar = '\0';
747 if (flags & ALT)
748 prec -= expt;
749 else
750 prec = ndig - expt;
751 if (prec < 0)
752 prec = 0;
753 } else {
754 /*
755 * Make %[gG] smell like %[eE], but
756 * trim trailing zeroes if no # flag.
757 */
758 if (!(flags & ALT))
759 prec = ndig;
760 }
761 }
762 if (expchar) {
763 expsize = exponent(expstr, expt - 1, expchar);
764 size = expsize + prec;
765 if (prec > 1 || flags & ALT)
766 ++size;
767 } else {
768 /* space for digits before decimal point */
769 if (expt > 0)
770 size = expt;
771 else /* "0" */
772 size = 1;
773 /* space for decimal pt and following digits */
774 if (prec || flags & ALT)
775 size += prec + 1;
776 lead = expt;
777 }
778 break;
779 #endif /* FLOATING_POINT */
780 #ifndef NO_PRINTF_PERCENT_N
781 case 'n':
782 if (flags & LLONGINT)
783 *GETARG(long long *) = ret;
784 else if (flags & LONGINT)
785 *GETARG(long *) = ret;
786 else if (flags & SHORTINT)
787 *GETARG(short *) = ret;
788 else if (flags & CHARINT)
789 *GETARG(signed char *) = ret;
790 else if (flags & PTRINT)
791 *GETARG(ptrdiff_t *) = ret;
792 else if (flags & SIZEINT)
793 *GETARG(ssize_t *) = ret;
794 else if (flags & MAXINT)
795 *GETARG(intmax_t *) = ret;
796 else
797 *GETARG(int *) = ret;
798 continue; /* no output */
799 #endif /* NO_PRINTF_PERCENT_N */
800 case 'O':
801 flags |= LONGINT;
802 /*FALLTHROUGH*/
803 case 'o':
804 _umax = UARG();
805 base = OCT;
806 goto nosign;
807 case 'p':
808 /*
809 * ``The argument shall be a pointer to void. The
810 * value of the pointer is converted to a sequence
811 * of printable characters, in an implementation-
812 * defined manner.''
813 * -- ANSI X3J11
814 */
815 /* NOSTRICT */
816 _umax = (u_long)GETARG(void *);
817 base = HEX;
818 xdigs = xdigs_lower;
819 ox[1] = 'x';
820 goto nosign;
821 case 'S':
822 flags |= LONGINT;
823 /*FALLTHROUGH*/
824 case 's':
825 if (flags & LONGINT) {
826 if ((cp = GETARG(wchar_t *)) == NULL)
827 cp = L"(null)";
828 } else {
829 char *mbsarg;
830 if ((mbsarg = GETARG(char *)) == NULL)
831 mbsarg = "(null)";
832 if (convbuf) {
833 free(convbuf);
834 convbuf = NULL;
835 }
836 convbuf = __mbsconv(mbsarg, prec);
837 if (convbuf == NULL) {
838 fp->_flags |= __SERR;
839 goto error;
840 } else
841 cp = convbuf;
842 }
843 if (prec >= 0) {
844 /*
845 * can't use wcslen; can only look for the
846 * NUL in the first `prec' characters, and
847 * wcslen() will go further.
848 */
849 wchar_t *p = wmemchr(cp, 0, prec);
851 size = p ? (p - cp) : prec;
852 } else {
853 size_t len;
855 if ((len = wcslen(cp)) > INT_MAX)
856 goto overflow;
857 size = (int)len;
858 }
859 sign = '\0';
860 break;
861 case 'U':
862 flags |= LONGINT;
863 /*FALLTHROUGH*/
864 case 'u':
865 _umax = UARG();
866 base = DEC;
867 goto nosign;
868 case 'X':
869 xdigs = xdigs_upper;
870 goto hex;
871 case 'x':
872 xdigs = xdigs_lower;
873 hex: _umax = UARG();
874 base = HEX;
875 /* leading 0x/X only if non-zero */
876 if (flags & ALT && _umax != 0)
877 ox[1] = ch;
879 /* unsigned conversions */
880 nosign: sign = '\0';
881 /*
882 * ``... diouXx conversions ... if a precision is
883 * specified, the 0 flag will be ignored.''
884 * -- ANSI X3J11
885 */
886 number: if ((dprec = prec) >= 0)
887 flags &= ~ZEROPAD;
889 /*
890 * ``The result of converting a zero value with an
891 * explicit precision of zero is no characters.''
892 * -- ANSI X3J11
893 */
894 cp = buf + BUF;
895 if (_umax != 0 || prec != 0) {
896 /*
897 * Unsigned mod is hard, and unsigned mod
898 * by a constant is easier than that by
899 * a variable; hence this switch.
900 */
901 switch (base) {
902 case OCT:
903 do {
904 *--cp = to_char(_umax & 7);
905 _umax >>= 3;
906 } while (_umax);
907 /* handle octal leading 0 */
908 if (flags & ALT && *cp != '0')
909 *--cp = '0';
910 break;
912 case DEC:
913 /* many numbers are 1 digit */
914 while (_umax >= 10) {
915 *--cp = to_char(_umax % 10);
916 _umax /= 10;
917 }
918 *--cp = to_char(_umax);
919 break;
921 case HEX:
922 do {
923 *--cp = xdigs[_umax & 15];
924 _umax >>= 4;
925 } while (_umax);
926 break;
928 default:
929 cp = L"bug in vfwprintf: bad base";
930 size = wcslen(cp);
931 goto skipsize;
932 }
933 }
934 size = buf + BUF - cp;
935 if (size > BUF) /* should never happen */
936 abort();
937 skipsize:
938 break;
939 default: /* "%?" prints ?, unless ? is NUL */
940 if (ch == '\0')
941 goto done;
942 /* pretend it was %c with argument ch */
943 cp = buf;
944 *cp = ch;
945 size = 1;
946 sign = '\0';
947 break;
948 }
950 /*
951 * All reasonable formats wind up here. At this point, `cp'
952 * points to a string which (if not flags&LADJUST) should be
953 * padded out to `width' places. If flags&ZEROPAD, it should
954 * first be prefixed by any sign or other prefix; otherwise,
955 * it should be blank padded before the prefix is emitted.
956 * After any left-hand padding and prefixing, emit zeroes
957 * required by a decimal %[diouxX] precision, then print the
958 * string proper, then emit zeroes required by any leftover
959 * floating precision; finally, if LADJUST, pad with blanks.
960 *
961 * Compute actual size, so we know how much to pad.
962 * size excludes decimal prec; realsz includes it.
963 */
964 realsz = dprec > size ? dprec : size;
965 if (sign)
966 realsz++;
967 if (ox[1])
968 realsz+= 2;
970 /* right-adjusting blank padding */
971 if ((flags & (LADJUST|ZEROPAD)) == 0)
972 PAD(width - realsz, blanks);
974 /* prefix */
975 if (sign)
976 PRINT(&sign, 1);
977 if (ox[1]) { /* ox[1] is either x, X, or \0 */
978 ox[0] = '0';
979 PRINT(ox, 2);
980 }
982 /* right-adjusting zero padding */
983 if ((flags & (LADJUST|ZEROPAD)) == ZEROPAD)
984 PAD(width - realsz, zeroes);
986 /* leading zeroes from decimal precision */
987 PAD(dprec - size, zeroes);
989 /* the string or number proper */
990 #ifdef FLOATING_POINT
991 if ((flags & FPT) == 0) {
992 PRINT(cp, size);
993 } else { /* glue together f_p fragments */
994 if (decimal_point == NULL)
995 decimal_point = nl_langinfo(RADIXCHAR);
996 if (!expchar) { /* %[fF] or sufficiently short %[gG] */
997 if (expt <= 0) {
998 PRINT(zeroes, 1);
999 if (prec || flags & ALT)
1000 PRINT(decimal_point, 1);
1001 PAD(-expt, zeroes);
1002 /* already handled initial 0's */
1003 prec += expt;
1004 } else {
1005 PRINTANDPAD(cp, convbuf + ndig,
1006 lead, zeroes);
1007 cp += lead;
1008 if (prec || flags & ALT)
1009 PRINT(decimal_point, 1);
1010 }
1011 PRINTANDPAD(cp, convbuf + ndig, prec, zeroes);
1012 } else { /* %[eE] or sufficiently long %[gG] */
1013 if (prec > 1 || flags & ALT) {
1014 buf[0] = *cp++;
1015 buf[1] = *decimal_point;
1016 PRINT(buf, 2);
1017 PRINT(cp, ndig-1);
1018 PAD(prec - ndig, zeroes);
1019 } else { /* XeYYY */
1020 PRINT(cp, 1);
1021 }
1022 PRINT(expstr, expsize);
1023 }
1024 }
1025 #else
1026 PRINT(cp, size);
1027 #endif
1028 /* left-adjusting padding (always blank) */
1029 if (flags & LADJUST)
1030 PAD(width - realsz, blanks);
1032 /* finally, adjust ret */
1033 if (width < realsz)
1034 width = realsz;
1035 if (width > INT_MAX - ret)
1036 goto overflow;
1037 ret += width;
1038 }
1039 done:
1040 error:
1041 va_end(orgap);
1042 if (__sferror(fp))
1043 ret = -1;
1044 goto finish;
1046 overflow:
1047 errno = ENOMEM;
1048 ret = -1;
1050 finish:
1051 if (convbuf)
1052 free(convbuf);
1053 #ifdef FLOATING_POINT
1054 if (dtoaresult)
1055 __freedtoa(dtoaresult);
1056 #endif
1057 if (argtable != NULL && argtable != statargtable) {
1058 munmap(argtable, argtablesiz);
1059 argtable = NULL;
1060 }
1061 return (ret);
1062 }
1064 int
1065 vfwprintf(FILE * __restrict fp, const wchar_t * __restrict fmt0, __va_list ap)
1066 {
1067 int r;
1069 FLOCKFILE(fp);
1070 r = __vfwprintf(fp, fmt0, ap);
1071 FUNLOCKFILE(fp);
1073 return (r);
1074 }
1076 /*
1077 * Type ids for argument type table.
1078 */
1079 #define T_UNUSED 0
1080 #define T_SHORT 1
1081 #define T_U_SHORT 2
1082 #define TP_SHORT 3
1083 #define T_INT 4
1084 #define T_U_INT 5
1085 #define TP_INT 6
1086 #define T_LONG 7
1087 #define T_U_LONG 8
1088 #define TP_LONG 9
1089 #define T_LLONG 10
1090 #define T_U_LLONG 11
1091 #define TP_LLONG 12
1092 #define T_DOUBLE 13
1093 #define T_LONG_DOUBLE 14
1094 #define TP_CHAR 15
1095 #define TP_VOID 16
1096 #define T_PTRINT 17
1097 #define TP_PTRINT 18
1098 #define T_SIZEINT 19
1099 #define T_SSIZEINT 20
1100 #define TP_SSIZEINT 21
1101 #define T_MAXINT 22
1102 #define T_MAXUINT 23
1103 #define TP_MAXINT 24
1104 #define T_CHAR 25
1105 #define T_U_CHAR 26
1106 #define T_WINT 27
1107 #define TP_WCHAR 28
1109 /*
1110 * Find all arguments when a positional parameter is encountered. Returns a
1111 * table, indexed by argument number, of pointers to each arguments. The
1112 * initial argument table should be an array of STATIC_ARG_TBL_SIZE entries.
1113 * It will be replaced with a mmap-ed one if it overflows (malloc cannot be
1114 * used since we are attempting to make snprintf thread safe, and alloca is
1115 * problematic since we have nested functions..)
1116 */
1117 static int
1118 __find_arguments(const wchar_t *fmt0, va_list ap, union arg **argtable,
1119 size_t *argtablesiz)
1120 {
1121 wchar_t *fmt; /* format string */
1122 int ch; /* character from fmt */
1123 int n, n2; /* handy integer (short term usage) */
1124 wchar_t *cp; /* handy char pointer (short term usage) */
1125 int flags; /* flags as above */
1126 unsigned char *typetable; /* table of types */
1127 unsigned char stattypetable[STATIC_ARG_TBL_SIZE];
1128 int tablesize; /* current size of type table */
1129 int tablemax; /* largest used index in table */
1130 int nextarg; /* 1-based argument index */
1131 int ret = 0; /* return value */
1133 /*
1134 * Add an argument type to the table, expanding if necessary.
1135 */
1136 #define ADDTYPE(type) \
1137 ((nextarg >= tablesize) ? \
1138 __grow_type_table(&typetable, &tablesize) : 0, \
1139 (nextarg > tablemax) ? tablemax = nextarg : 0, \
1140 typetable[nextarg++] = type)
1142 #define ADDSARG() \
1143 ((flags&MAXINT) ? ADDTYPE(T_MAXINT) : \
1144 ((flags&PTRINT) ? ADDTYPE(T_PTRINT) : \
1145 ((flags&SIZEINT) ? ADDTYPE(T_SSIZEINT) : \
1146 ((flags&LLONGINT) ? ADDTYPE(T_LLONG) : \
1147 ((flags&LONGINT) ? ADDTYPE(T_LONG) : \
1148 ((flags&SHORTINT) ? ADDTYPE(T_SHORT) : \
1149 ((flags&CHARINT) ? ADDTYPE(T_CHAR) : ADDTYPE(T_INT))))))))
1151 #define ADDUARG() \
1152 ((flags&MAXINT) ? ADDTYPE(T_MAXUINT) : \
1153 ((flags&PTRINT) ? ADDTYPE(T_PTRINT) : \
1154 ((flags&SIZEINT) ? ADDTYPE(T_SIZEINT) : \
1155 ((flags&LLONGINT) ? ADDTYPE(T_U_LLONG) : \
1156 ((flags&LONGINT) ? ADDTYPE(T_U_LONG) : \
1157 ((flags&SHORTINT) ? ADDTYPE(T_U_SHORT) : \
1158 ((flags&CHARINT) ? ADDTYPE(T_U_CHAR) : ADDTYPE(T_U_INT))))))))
1160 /*
1161 * Add * arguments to the type array.
1162 */
1163 #define ADDASTER() \
1164 n2 = 0; \
1165 cp = fmt; \
1166 while (is_digit(*cp)) { \
1167 APPEND_DIGIT(n2, *cp); \
1168 cp++; \
1169 } \
1170 if (*cp == '$') { \
1171 int hold = nextarg; \
1172 nextarg = n2; \
1173 ADDTYPE(T_INT); \
1174 nextarg = hold; \
1175 fmt = ++cp; \
1176 } else { \
1177 ADDTYPE(T_INT); \
1178 }
1179 fmt = (wchar_t *)fmt0;
1180 typetable = stattypetable;
1181 tablesize = STATIC_ARG_TBL_SIZE;
1182 tablemax = 0;
1183 nextarg = 1;
1184 memset(typetable, T_UNUSED, STATIC_ARG_TBL_SIZE);
1186 /*
1187 * Scan the format for conversions (`%' character).
1188 */
1189 for (;;) {
1190 for (cp = fmt; (ch = *fmt) != '\0' && ch != '%'; fmt++)
1191 continue;
1192 if (ch == '\0')
1193 goto done;
1194 fmt++; /* skip over '%' */
1196 flags = 0;
1198 rflag: ch = *fmt++;
1199 reswitch: switch (ch) {
1200 case ' ':
1201 case '#':
1202 case '\'':
1203 goto rflag;
1204 case '*':
1205 ADDASTER();
1206 goto rflag;
1207 case '-':
1208 case '+':
1209 goto rflag;
1210 case '.':
1211 if ((ch = *fmt++) == '*') {
1212 ADDASTER();
1213 goto rflag;
1214 }
1215 while (is_digit(ch)) {
1216 ch = *fmt++;
1217 }
1218 goto reswitch;
1219 case '0':
1220 goto rflag;
1221 case '1': case '2': case '3': case '4':
1222 case '5': case '6': case '7': case '8': case '9':
1223 n = 0;
1224 do {
1225 APPEND_DIGIT(n ,ch);
1226 ch = *fmt++;
1227 } while (is_digit(ch));
1228 if (ch == '$') {
1229 nextarg = n;
1230 goto rflag;
1231 }
1232 goto reswitch;
1233 #ifdef FLOATING_POINT
1234 case 'L':
1235 flags |= LONGDBL;
1236 goto rflag;
1237 #endif
1238 case 'h':
1239 if (*fmt == 'h') {
1240 fmt++;
1241 flags |= CHARINT;
1242 } else {
1243 flags |= SHORTINT;
1244 }
1245 goto rflag;
1246 case 'l':
1247 if (*fmt == 'l') {
1248 fmt++;
1249 flags |= LLONGINT;
1250 } else {
1251 flags |= LONGINT;
1252 }
1253 goto rflag;
1254 case 'q':
1255 flags |= LLONGINT;
1256 goto rflag;
1257 case 't':
1258 flags |= PTRINT;
1259 goto rflag;
1260 case 'z':
1261 flags |= SIZEINT;
1262 goto rflag;
1263 case 'C':
1264 flags |= LONGINT;
1265 /*FALLTHROUGH*/
1266 case 'c':
1267 if (flags & LONGINT)
1268 ADDTYPE(T_WINT);
1269 else
1270 ADDTYPE(T_INT);
1271 break;
1272 case 'D':
1273 flags |= LONGINT;
1274 /*FALLTHROUGH*/
1275 case 'd':
1276 case 'i':
1277 ADDSARG();
1278 break;
1279 #ifdef FLOATING_POINT
1280 case 'a':
1281 case 'A':
1282 case 'e':
1283 case 'E':
1284 case 'f':
1285 case 'F':
1286 case 'g':
1287 case 'G':
1288 if (flags & LONGDBL)
1289 ADDTYPE(T_LONG_DOUBLE);
1290 else
1291 ADDTYPE(T_DOUBLE);
1292 break;
1293 #endif /* FLOATING_POINT */
1294 #ifndef NO_PRINTF_PERCENT_N
1295 case 'n':
1296 if (flags & LLONGINT)
1297 ADDTYPE(TP_LLONG);
1298 else if (flags & LONGINT)
1299 ADDTYPE(TP_LONG);
1300 else if (flags & SHORTINT)
1301 ADDTYPE(TP_SHORT);
1302 else if (flags & PTRINT)
1303 ADDTYPE(TP_PTRINT);
1304 else if (flags & SIZEINT)
1305 ADDTYPE(TP_SSIZEINT);
1306 else if (flags & MAXINT)
1307 ADDTYPE(TP_MAXINT);
1308 else
1309 ADDTYPE(TP_INT);
1310 continue; /* no output */
1311 #endif /* NO_PRINTF_PERCENT_N */
1312 case 'O':
1313 flags |= LONGINT;
1314 /*FALLTHROUGH*/
1315 case 'o':
1316 ADDUARG();
1317 break;
1318 case 'p':
1319 ADDTYPE(TP_VOID);
1320 break;
1321 case 'S':
1322 flags |= LONGINT;
1323 /*FALLTHROUGH*/
1324 case 's':
1325 if (flags & LONGINT)
1326 ADDTYPE(TP_CHAR);
1327 else
1328 ADDTYPE(TP_WCHAR);
1329 break;
1330 case 'U':
1331 flags |= LONGINT;
1332 /*FALLTHROUGH*/
1333 case 'u':
1334 case 'X':
1335 case 'x':
1336 ADDUARG();
1337 break;
1338 default: /* "%?" prints ?, unless ? is NUL */
1339 if (ch == '\0')
1340 goto done;
1341 break;
1342 }
1343 }
1344 done:
1345 /*
1346 * Build the argument table.
1347 */
1348 if (tablemax >= STATIC_ARG_TBL_SIZE) {
1349 *argtablesiz = sizeof(union arg) * (tablemax + 1);
1350 *argtable = mmap(NULL, *argtablesiz,
1351 PROT_WRITE|PROT_READ, MAP_ANON|MAP_PRIVATE, -1, 0);
1352 if (*argtable == MAP_FAILED)
1353 return (-1);
1354 }
1356 #if 0
1357 /* XXX is this required? */
1358 (*argtable)[0].intarg = 0;
1359 #endif
1360 for (n = 1; n <= tablemax; n++) {
1361 switch (typetable[n]) {
1362 case T_UNUSED:
1363 case T_CHAR:
1364 case T_U_CHAR:
1365 case T_SHORT:
1366 case T_U_SHORT:
1367 case T_INT:
1368 (*argtable)[n].intarg = va_arg(ap, int);
1369 break;
1370 case TP_SHORT:
1371 (*argtable)[n].pshortarg = va_arg(ap, short *);
1372 break;
1373 case T_U_INT:
1374 (*argtable)[n].uintarg = va_arg(ap, unsigned int);
1375 break;
1376 case TP_INT:
1377 (*argtable)[n].pintarg = va_arg(ap, int *);
1378 break;
1379 case T_LONG:
1380 (*argtable)[n].longarg = va_arg(ap, long);
1381 break;
1382 case T_U_LONG:
1383 (*argtable)[n].ulongarg = va_arg(ap, unsigned long);
1384 break;
1385 case TP_LONG:
1386 (*argtable)[n].plongarg = va_arg(ap, long *);
1387 break;
1388 case T_LLONG:
1389 (*argtable)[n].longlongarg = va_arg(ap, long long);
1390 break;
1391 case T_U_LLONG:
1392 (*argtable)[n].ulonglongarg = va_arg(ap, unsigned long long);
1393 break;
1394 case TP_LLONG:
1395 (*argtable)[n].plonglongarg = va_arg(ap, long long *);
1396 break;
1397 #ifdef FLOATING_POINT
1398 case T_DOUBLE:
1399 (*argtable)[n].doublearg = va_arg(ap, double);
1400 break;
1401 case T_LONG_DOUBLE:
1402 (*argtable)[n].longdoublearg = va_arg(ap, long double);
1403 break;
1404 #endif
1405 case TP_CHAR:
1406 (*argtable)[n].pchararg = va_arg(ap, char *);
1407 break;
1408 case TP_VOID:
1409 (*argtable)[n].pvoidarg = va_arg(ap, void *);
1410 break;
1411 case T_PTRINT:
1412 (*argtable)[n].ptrdiffarg = va_arg(ap, ptrdiff_t);
1413 break;
1414 case TP_PTRINT:
1415 (*argtable)[n].pptrdiffarg = va_arg(ap, ptrdiff_t *);
1416 break;
1417 case T_SIZEINT:
1418 (*argtable)[n].sizearg = va_arg(ap, size_t);
1419 break;
1420 case T_SSIZEINT:
1421 (*argtable)[n].ssizearg = va_arg(ap, ssize_t);
1422 break;
1423 case TP_SSIZEINT:
1424 (*argtable)[n].pssizearg = va_arg(ap, ssize_t *);
1425 break;
1426 case TP_MAXINT:
1427 (*argtable)[n].intmaxarg = va_arg(ap, intmax_t);
1428 break;
1429 case T_WINT:
1430 (*argtable)[n].wintarg = va_arg(ap, wint_t);
1431 break;
1432 case TP_WCHAR:
1433 (*argtable)[n].pwchararg = va_arg(ap, wchar_t *);
1434 break;
1435 }
1436 }
1437 goto finish;
1439 overflow:
1440 errno = ENOMEM;
1441 ret = -1;
1443 finish:
1444 if (typetable != NULL && typetable != stattypetable) {
1445 munmap(typetable, *argtablesiz);
1446 typetable = NULL;
1447 }
1448 return (ret);
1449 }
1451 /*
1452 * Increase the size of the type table.
1453 */
1454 static int
1455 __grow_type_table(unsigned char **typetable, int *tablesize)
1456 {
1457 unsigned char *oldtable = *typetable;
1458 int newsize = *tablesize * 2;
1460 if (newsize < getpagesize())
1461 newsize = getpagesize();
1463 if (*tablesize == STATIC_ARG_TBL_SIZE) {
1464 *typetable = mmap(NULL, newsize, PROT_WRITE|PROT_READ,
1465 MAP_ANON|MAP_PRIVATE, -1, 0);
1466 if (*typetable == MAP_FAILED)
1467 return (-1);
1468 bcopy(oldtable, *typetable, *tablesize);
1469 } else {
1470 unsigned char *new = mmap(NULL, newsize, PROT_WRITE|PROT_READ,
1471 MAP_ANON|MAP_PRIVATE, -1, 0);
1472 if (new == MAP_FAILED)
1473 return (-1);
1474 memmove(new, *typetable, *tablesize);
1475 munmap(*typetable, *tablesize);
1476 *typetable = new;
1477 }
1478 memset(*typetable + *tablesize, T_UNUSED, (newsize - *tablesize));
1480 *tablesize = newsize;
1481 return (0);
1482 }
1485 #ifdef FLOATING_POINT
1486 static int
1487 exponent(wchar_t *p0, int exp, int fmtch)
1488 {
1489 wchar_t *p, *t;
1490 wchar_t expbuf[MAXEXPDIG];
1492 p = p0;
1493 *p++ = fmtch;
1494 if (exp < 0) {
1495 exp = -exp;
1496 *p++ = '-';
1497 } else
1498 *p++ = '+';
1499 t = expbuf + MAXEXPDIG;
1500 if (exp > 9) {
1501 do {
1502 *--t = to_char(exp % 10);
1503 } while ((exp /= 10) > 9);
1504 *--t = to_char(exp);
1505 for (; t < expbuf + MAXEXPDIG; *p++ = *t++)
1506 /* nothing */;
1507 } else {
1508 /*
1509 * Exponents for decimal floating point conversions
1510 * (%[eEgG]) must be at least two characters long,
1511 * whereas exponents for hexadecimal conversions can
1512 * be only one character long.
1513 */
1514 if (fmtch == 'e' || fmtch == 'E')
1515 *p++ = '0';
1516 *p++ = to_char(exp);
1517 }
1518 return (p - p0);
1519 }
1520 #endif /* FLOATING_POINT */