1 /*-
2 * SPDX-License-Identifier: BSD-3-Clause
3 *
4 * Copyright (c) 1990, 1993
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 * Copyright (c) 2011 The FreeBSD Foundation
11 *
12 * Portions of this software were developed by David Chisnall
13 * under sponsorship from the FreeBSD Foundation.
14 *
15 * Redistribution and use in source and binary forms, with or without
16 * modification, are permitted provided that the following conditions
17 * are met:
18 * 1. Redistributions of source code must retain the above copyright
19 * notice, this list of conditions and the following disclaimer.
20 * 2. Redistributions in binary form must reproduce the above copyright
21 * notice, this list of conditions and the following disclaimer in the
22 * documentation and/or other materials provided with the distribution.
23 * 3. Neither the name of the University nor the names of its contributors
24 * may be used to endorse or promote products derived from this software
25 * without specific prior written permission.
26 *
27 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
28 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
29 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
30 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
31 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
32 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
33 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
34 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
35 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
36 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
37 * SUCH DAMAGE.
38 */
39
40 /*
41 * Actual wprintf innards.
42 *
43 * Avoid making gratuitous changes to this source file; it should be kept
44 * as close as possible to vfprintf.c for ease of maintenance.
45 */
46
47 #include "namespace.h"
48 #include <sys/types.h>
49
50 #include <ctype.h>
51 #include <errno.h>
52 #include <limits.h>
53 #include <locale.h>
54 #include <stdarg.h>
55 #include <stddef.h>
56 #include <stdint.h>
57 #include <stdio.h>
58 #include <stdlib.h>
59 #include <string.h>
60 #include <wchar.h>
61 #include <wctype.h>
62 #include "un-namespace.h"
63
64 #include "libc_private.h"
65 #include "local.h"
66 #include "fvwrite.h"
67 #include "printflocal.h"
68 #include "xlocale_private.h"
69
70 static int __sprint(FILE *, struct __suio *, locale_t);
71 static int __sbprintf(FILE *, locale_t, const wchar_t *, va_list) __noinline;
72 static wint_t __xfputwc(wchar_t, FILE *, locale_t);
73 static wchar_t *__mbsconv(char *, int);
74
75 #define CHAR wchar_t
76 #include "printfcommon.h"
77
78 struct grouping_state {
79 wchar_t thousands_sep; /* locale-specific thousands separator */
80 const char *grouping; /* locale-specific numeric grouping rules */
81 int lead; /* sig figs before decimal or group sep */
82 int nseps; /* number of group separators with ' */
83 int nrepeats; /* number of repeats of the last group */
84 };
85
86 static const mbstate_t initial_mbs;
87
88 static inline wchar_t
get_decpt(locale_t locale)89 get_decpt(locale_t locale)
90 {
91 mbstate_t mbs;
92 wchar_t decpt;
93 int nconv;
94
95 mbs = initial_mbs;
96 nconv = mbrtowc(&decpt, localeconv_l(locale)->decimal_point, MB_CUR_MAX, &mbs);
97 if (nconv == (size_t)-1 || nconv == (size_t)-2)
98 decpt = '.'; /* failsafe */
99 return (decpt);
100 }
101
102 static inline wchar_t
get_thousep(locale_t locale)103 get_thousep(locale_t locale)
104 {
105 mbstate_t mbs;
106 wchar_t thousep;
107 int nconv;
108
109 mbs = initial_mbs;
110 nconv = mbrtowc(&thousep, localeconv_l(locale)->thousands_sep,
111 MB_CUR_MAX, &mbs);
112 if (nconv == (size_t)-1 || nconv == (size_t)-2)
113 thousep = '\0'; /* failsafe */
114 return (thousep);
115 }
116
117 /*
118 * Initialize the thousands' grouping state in preparation to print a
119 * number with ndigits digits. This routine returns the total number
120 * of wide characters that will be printed.
121 */
122 static int
grouping_init(struct grouping_state * gs,int ndigits,locale_t locale)123 grouping_init(struct grouping_state *gs, int ndigits, locale_t locale)
124 {
125
126 gs->grouping = localeconv_l(locale)->grouping;
127 gs->thousands_sep = get_thousep(locale);
128
129 gs->nseps = gs->nrepeats = 0;
130 gs->lead = ndigits;
131 while (*gs->grouping != CHAR_MAX) {
132 if (gs->lead <= *gs->grouping)
133 break;
134 gs->lead -= *gs->grouping;
135 if (*(gs->grouping+1)) {
136 gs->nseps++;
137 gs->grouping++;
138 } else
139 gs->nrepeats++;
140 }
141 return (gs->nseps + gs->nrepeats);
142 }
143
144 /*
145 * Print a number with thousands' separators.
146 */
147 static int
grouping_print(struct grouping_state * gs,struct io_state * iop,const CHAR * cp,const CHAR * ep,locale_t locale)148 grouping_print(struct grouping_state *gs, struct io_state *iop,
149 const CHAR *cp, const CHAR *ep, locale_t locale)
150 {
151 const CHAR *cp0 = cp;
152
153 if (io_printandpad(iop, cp, ep, gs->lead, zeroes, locale))
154 return (-1);
155 cp += gs->lead;
156 while (gs->nseps > 0 || gs->nrepeats > 0) {
157 if (gs->nrepeats > 0)
158 gs->nrepeats--;
159 else {
160 gs->grouping--;
161 gs->nseps--;
162 }
163 if (io_print(iop, &gs->thousands_sep, 1, locale))
164 return (-1);
165 if (io_printandpad(iop, cp, ep, *gs->grouping, zeroes, locale))
166 return (-1);
167 cp += *gs->grouping;
168 }
169 if (cp > ep)
170 cp = ep;
171 return (cp - cp0);
172 }
173
174
175 /*
176 * Flush out all the vectors defined by the given uio,
177 * then reset it so that it can be reused.
178 *
179 * XXX The fact that we do this a character at a time and convert to a
180 * multibyte character sequence even if the destination is a wide
181 * string eclipses the benefits of buffering.
182 */
183 static int
__sprint(FILE * fp,struct __suio * uio,locale_t locale)184 __sprint(FILE *fp, struct __suio *uio, locale_t locale)
185 {
186 struct __siov *iov;
187 wchar_t *p;
188 int i, len;
189
190 iov = uio->uio_iov;
191 for (; uio->uio_resid != 0; uio->uio_resid -= len, iov++) {
192 p = (wchar_t *)iov->iov_base;
193 len = iov->iov_len;
194 for (i = 0; i < len; i++) {
195 if (__xfputwc(p[i], fp, locale) == WEOF)
196 return (-1);
197 }
198 }
199 uio->uio_iovcnt = 0;
200 return (0);
201 }
202
203 /*
204 * Helper function for `fprintf to unbuffered unix file': creates a
205 * temporary buffer. We only work on write-only files; this avoids
206 * worries about ungetc buffers and so forth.
207 */
208 static int
__sbprintf(FILE * fp,locale_t locale,const wchar_t * fmt,va_list ap)209 __sbprintf(FILE *fp, locale_t locale, const wchar_t *fmt, va_list ap)
210 {
211 int ret;
212 FILE fake;
213 unsigned char buf[BUFSIZ];
214
215 /* XXX This is probably not needed. */
216 if (prepwrite(fp) != 0)
217 return (EOF);
218
219 /* copy the important variables */
220 fake._flags = fp->_flags & ~__SNBF;
221 fake._file = fp->_file;
222 fake._cookie = fp->_cookie;
223 fake._write = fp->_write;
224 fake._orientation = fp->_orientation;
225 fake._mbstate = fp->_mbstate;
226
227 /* set up the buffer */
228 fake._bf._base = fake._p = buf;
229 fake._bf._size = fake._w = sizeof(buf);
230 fake._lbfsize = 0; /* not actually used, but Just In Case */
231
232 /* do the work, then copy any error status */
233 ret = __vfwprintf(&fake, locale, fmt, ap);
234 if (ret >= 0 && __fflush(&fake))
235 ret = WEOF;
236 if (fake._flags & __SERR)
237 fp->_flags |= __SERR;
238 return (ret);
239 }
240
241 /*
242 * Like __fputwc, but handles fake string (__SSTR) files properly.
243 * File must already be locked.
244 */
245 static wint_t
__xfputwc(wchar_t wc,FILE * fp,locale_t locale)246 __xfputwc(wchar_t wc, FILE *fp, locale_t locale)
247 {
248 mbstate_t mbs;
249 char buf[MB_LEN_MAX];
250 struct __suio uio;
251 struct __siov iov;
252 size_t len;
253
254 if ((fp->_flags & __SSTR) == 0)
255 return (__fputwc(wc, fp, locale));
256
257 mbs = initial_mbs;
258 if ((len = wcrtomb(buf, wc, &mbs)) == (size_t)-1) {
259 fp->_flags |= __SERR;
260 return (WEOF);
261 }
262 uio.uio_iov = &iov;
263 uio.uio_resid = len;
264 uio.uio_iovcnt = 1;
265 iov.iov_base = buf;
266 iov.iov_len = len;
267 return (__sfvwrite(fp, &uio) != EOF ? (wint_t)wc : WEOF);
268 }
269
270 /*
271 * Convert a multibyte character string argument for the %s format to a wide
272 * string representation. ``prec'' specifies the maximum number of bytes
273 * to output. If ``prec'' is greater than or equal to zero, we can't assume
274 * that the multibyte char. string ends in a null character.
275 */
276 static wchar_t *
__mbsconv(char * mbsarg,int prec)277 __mbsconv(char *mbsarg, int prec)
278 {
279 mbstate_t mbs;
280 wchar_t *convbuf, *wcp;
281 const char *p;
282 size_t insize, nchars, nconv;
283
284 if (mbsarg == NULL)
285 return (NULL);
286
287 /*
288 * Supplied argument is a multibyte string; convert it to wide
289 * characters first.
290 */
291 if (prec >= 0) {
292 /*
293 * String is not guaranteed to be NUL-terminated. Find the
294 * number of characters to print.
295 */
296 p = mbsarg;
297 insize = nchars = nconv = 0;
298 mbs = initial_mbs;
299 while (nchars != (size_t)prec) {
300 nconv = mbrlen(p, MB_CUR_MAX, &mbs);
301 if (nconv == 0 || nconv == (size_t)-1 ||
302 nconv == (size_t)-2)
303 break;
304 p += nconv;
305 nchars++;
306 insize += nconv;
307 }
308 if (nconv == (size_t)-1 || nconv == (size_t)-2)
309 return (NULL);
310 } else {
311 insize = strlen(mbsarg);
312 nconv = 0;
313 }
314
315 /*
316 * Allocate buffer for the result and perform the conversion,
317 * converting at most `size' bytes of the input multibyte string to
318 * wide characters for printing.
319 */
320 convbuf = malloc((insize + 1) * sizeof(*convbuf));
321 if (convbuf == NULL)
322 return (NULL);
323 wcp = convbuf;
324 p = mbsarg;
325 mbs = initial_mbs;
326 while (insize != 0) {
327 nconv = mbrtowc(wcp, p, insize, &mbs);
328 if (nconv == 0 || nconv == (size_t)-1 || nconv == (size_t)-2)
329 break;
330 wcp++;
331 p += nconv;
332 insize -= nconv;
333 }
334 if (nconv == (size_t)-1 || nconv == (size_t)-2) {
335 free(convbuf);
336 return (NULL);
337 }
338 *wcp = L'\0';
339
340 return (convbuf);
341 }
342
343 /*
344 * MT-safe version
345 */
346 int
vfwprintf_l(FILE * __restrict fp,locale_t locale,const wchar_t * __restrict fmt0,va_list ap)347 vfwprintf_l(FILE * __restrict fp, locale_t locale,
348 const wchar_t * __restrict fmt0, va_list ap)
349
350 {
351 int ret;
352 FIX_LOCALE(locale);
353 FLOCKFILE_CANCELSAFE(fp);
354 /* optimise fprintf(stderr) (and other unbuffered Unix files) */
355 if ((fp->_flags & (__SNBF|__SWR|__SRW)) == (__SNBF|__SWR) &&
356 fp->_file >= 0)
357 ret = __sbprintf(fp, locale, fmt0, ap);
358 else
359 ret = __vfwprintf(fp, locale, fmt0, ap);
360 FUNLOCKFILE_CANCELSAFE();
361 return (ret);
362 }
363 int
vfwprintf(FILE * __restrict fp,const wchar_t * __restrict fmt0,va_list ap)364 vfwprintf(FILE * __restrict fp, const wchar_t * __restrict fmt0, va_list ap)
365 {
366 return vfwprintf_l(fp, __get_locale(), fmt0, ap);
367 }
368
369 /*
370 * The size of the buffer we use as scratch space for integer
371 * conversions, among other things. We need enough space to
372 * write a uintmax_t in binary.
373 */
374 #define BUF (sizeof(uintmax_t) * CHAR_BIT)
375
376 /*
377 * Non-MT-safe version
378 */
379 int
__vfwprintf(FILE * fp,locale_t locale,const wchar_t * fmt0,va_list ap)380 __vfwprintf(FILE *fp, locale_t locale, const wchar_t *fmt0, va_list ap)
381 {
382 wchar_t *fmt; /* format string */
383 wchar_t ch; /* character from fmt */
384 int n, n2; /* handy integer (short term usage) */
385 wchar_t *cp; /* handy char pointer (short term usage) */
386 int flags; /* flags as above */
387 int ret; /* return value accumulator */
388 int width; /* width from format (%8d), or 0 */
389 int prec; /* precision from format; <0 for N/A */
390 wchar_t sign; /* sign prefix (' ', '+', '-', or \0) */
391 struct grouping_state gs; /* thousands' grouping info */
392 /*
393 * We can decompose the printed representation of floating
394 * point numbers into several parts, some of which may be empty:
395 *
396 * [+|-| ] [0x|0X] MMM . NNN [e|E|p|P] [+|-] ZZ
397 * A B ---C--- D E F
398 *
399 * A: 'sign' holds this value if present; '\0' otherwise
400 * B: ox[1] holds the 'x' or 'X'; '\0' if not hexadecimal
401 * C: cp points to the string MMMNNN. Leading and trailing
402 * zeros are not in the string and must be added.
403 * D: expchar holds this character; '\0' if no exponent, e.g. %f
404 * F: at least two digits for decimal, at least one digit for hex
405 */
406 wchar_t decimal_point; /* locale specific decimal point */
407 int signflag; /* true if float is negative */
408 union { /* floating point arguments %[aAeEfFgG] */
409 double dbl;
410 long double ldbl;
411 } fparg;
412 int expt; /* integer value of exponent */
413 char expchar; /* exponent character: [eEpP\0] */
414 char *dtoaend; /* pointer to end of converted digits */
415 int expsize; /* character count for expstr */
416 int ndig; /* actual number of digits returned by dtoa */
417 wchar_t expstr[MAXEXPDIG+2]; /* buffer for exponent string: e+ZZZ */
418 char *dtoaresult; /* buffer allocated by dtoa */
419 u_long ulval; /* integer arguments %[diouxX] */
420 uintmax_t ujval; /* %j, %ll, %q, %t, %z integers */
421 int base; /* base for [diouxX] conversion */
422 int dprec; /* a copy of prec if [diouxX], 0 otherwise */
423 int realsz; /* field size expanded by dprec, sign, etc */
424 int size; /* size of converted field or string */
425 int prsize; /* max size of printed field */
426 const char *xdigs; /* digits for [xX] conversion */
427 struct io_state io; /* I/O buffering state */
428 wchar_t buf[BUF]; /* buffer with space for digits of uintmax_t */
429 wchar_t ox[2]; /* space for 0x hex-prefix */
430 union arg *argtable; /* args, built due to positional arg */
431 union arg statargtable [STATIC_ARG_TBL_SIZE];
432 int nextarg; /* 1-based argument index */
433 va_list orgap; /* original argument pointer */
434 wchar_t *convbuf; /* multibyte to wide conversion result */
435 int savserr;
436
437 static const char xdigs_lower[16] = "0123456789abcdef";
438 static const char xdigs_upper[16] = "0123456789ABCDEF";
439
440 /* BEWARE, these `goto error' on error. */
441 #define PRINT(ptr, len) do { \
442 if (io_print(&io, (ptr), (len), locale)) \
443 goto error; \
444 } while (0)
445 #define PAD(howmany, with) { \
446 if (io_pad(&io, (howmany), (with), locale)) \
447 goto error; \
448 }
449 #define PRINTANDPAD(p, ep, len, with) { \
450 if (io_printandpad(&io, (p), (ep), (len), (with), locale)) \
451 goto error; \
452 }
453 #define FLUSH() { \
454 if (io_flush(&io, locale)) \
455 goto error; \
456 }
457
458 /*
459 * Get the argument indexed by nextarg. If the argument table is
460 * built, use it to get the argument. If its not, get the next
461 * argument (and arguments must be gotten sequentially).
462 */
463 #define GETARG(type) \
464 ((argtable != NULL) ? *((type*)(&argtable[nextarg++])) : \
465 (nextarg++, va_arg(ap, type)))
466
467 /*
468 * To extend shorts properly, we need both signed and unsigned
469 * argument extraction methods.
470 */
471 #define SARG() \
472 (flags&LONGINT ? GETARG(long) : \
473 flags&SHORTINT ? (long)(short)GETARG(int) : \
474 flags&CHARINT ? (long)(signed char)GETARG(int) : \
475 (long)GETARG(int))
476 #define UARG() \
477 (flags&LONGINT ? GETARG(u_long) : \
478 flags&SHORTINT ? (u_long)(u_short)GETARG(int) : \
479 flags&CHARINT ? (u_long)(u_char)GETARG(int) : \
480 (u_long)GETARG(u_int))
481 #define INTMAX_SIZE (INTMAXT|SIZET|PTRDIFFT|LLONGINT)
482 #define SJARG() \
483 (flags&INTMAXT ? GETARG(intmax_t) : \
484 flags&SIZET ? (intmax_t)GETARG(ssize_t) : \
485 flags&PTRDIFFT ? (intmax_t)GETARG(ptrdiff_t) : \
486 (intmax_t)GETARG(long long))
487 #define UJARG() \
488 (flags&INTMAXT ? GETARG(uintmax_t) : \
489 flags&SIZET ? (uintmax_t)GETARG(size_t) : \
490 flags&PTRDIFFT ? (uintmax_t)GETARG(ptrdiff_t) : \
491 (uintmax_t)GETARG(unsigned long long))
492
493 /*
494 * Get * arguments, including the form *nn$. Preserve the nextarg
495 * that the argument can be gotten once the type is determined.
496 */
497 #define GETASTER(val) \
498 n2 = 0; \
499 cp = fmt; \
500 while (is_digit(*cp)) { \
501 n2 = 10 * n2 + to_digit(*cp); \
502 cp++; \
503 } \
504 if (*cp == '$') { \
505 int hold = nextarg; \
506 if (argtable == NULL) { \
507 argtable = statargtable; \
508 if (__find_warguments (fmt0, orgap, &argtable)) { \
509 ret = EOF; \
510 goto error; \
511 } \
512 } \
513 nextarg = n2; \
514 val = GETARG (int); \
515 nextarg = hold; \
516 fmt = ++cp; \
517 } else { \
518 val = GETARG (int); \
519 }
520
521
522 /* sorry, fwprintf(read_only_file, L"") returns WEOF, not 0 */
523 if (prepwrite(fp) != 0) {
524 errno = EBADF;
525 return (EOF);
526 }
527
528 savserr = fp->_flags & __SERR;
529 fp->_flags &= ~__SERR;
530
531 convbuf = NULL;
532 fmt = (wchar_t *)fmt0;
533 argtable = NULL;
534 nextarg = 1;
535 va_copy(orgap, ap);
536 io_init(&io, fp);
537 ret = 0;
538 decimal_point = get_decpt(locale);
539
540 /*
541 * Scan the format for conversions (`%' character).
542 */
543 for (;;) {
544 for (cp = fmt; (ch = *fmt) != '\0' && ch != '%'; fmt++)
545 /* void */;
546 if ((n = fmt - cp) != 0) {
547 if ((unsigned)ret + n > INT_MAX) {
548 ret = EOF;
549 errno = EOVERFLOW;
550 goto error;
551 }
552 PRINT(cp, n);
553 ret += n;
554 }
555 if (ch == '\0')
556 goto done;
557 fmt++; /* skip over '%' */
558
559 flags = 0;
560 dprec = 0;
561 width = 0;
562 prec = -1;
563 gs.grouping = NULL;
564 sign = '\0';
565 ox[1] = '\0';
566
567 rflag: ch = *fmt++;
568 reswitch: switch (ch) {
569 case ' ':
570 /*-
571 * ``If the space and + flags both appear, the space
572 * flag will be ignored.''
573 * -- ANSI X3J11
574 */
575 if (!sign)
576 sign = ' ';
577 goto rflag;
578 case '#':
579 flags |= ALT;
580 goto rflag;
581 case '*':
582 /*-
583 * ``A negative field width argument is taken as a
584 * - flag followed by a positive field width.''
585 * -- ANSI X3J11
586 * They don't exclude field widths read from args.
587 */
588 GETASTER (width);
589 if (width >= 0)
590 goto rflag;
591 width = -width;
592 /* FALLTHROUGH */
593 case '-':
594 flags |= LADJUST;
595 goto rflag;
596 case '+':
597 sign = '+';
598 goto rflag;
599 case '\'':
600 flags |= GROUPING;
601 goto rflag;
602 case '.':
603 if ((ch = *fmt++) == '*') {
604 GETASTER (prec);
605 goto rflag;
606 }
607 prec = 0;
608 while (is_digit(ch)) {
609 prec = 10 * prec + to_digit(ch);
610 ch = *fmt++;
611 }
612 goto reswitch;
613 case '0':
614 /*-
615 * ``Note that 0 is taken as a flag, not as the
616 * beginning of a field width.''
617 * -- ANSI X3J11
618 */
619 flags |= ZEROPAD;
620 goto rflag;
621 case '1': case '2': case '3': case '4':
622 case '5': case '6': case '7': case '8': case '9':
623 n = 0;
624 do {
625 n = 10 * n + to_digit(ch);
626 ch = *fmt++;
627 } while (is_digit(ch));
628 if (ch == '$') {
629 nextarg = n;
630 if (argtable == NULL) {
631 argtable = statargtable;
632 if (__find_warguments (fmt0, orgap,
633 &argtable)) {
634 ret = EOF;
635 goto error;
636 }
637 }
638 goto rflag;
639 }
640 width = n;
641 goto reswitch;
642 case 'L':
643 flags |= LONGDBL;
644 goto rflag;
645 case 'h':
646 if (flags & SHORTINT) {
647 flags &= ~SHORTINT;
648 flags |= CHARINT;
649 } else
650 flags |= SHORTINT;
651 goto rflag;
652 case 'j':
653 flags |= INTMAXT;
654 goto rflag;
655 case 'l':
656 if (flags & LONGINT) {
657 flags &= ~LONGINT;
658 flags |= LLONGINT;
659 } else
660 flags |= LONGINT;
661 goto rflag;
662 case 'q':
663 flags |= LLONGINT; /* not necessarily */
664 goto rflag;
665 case 't':
666 flags |= PTRDIFFT;
667 goto rflag;
668 case 'w':
669 /*
670 * Fixed-width integer types. On all platforms we
671 * support, int8_t is equivalent to char, int16_t
672 * is equivalent to short, int32_t is equivalent
673 * to int, int64_t is equivalent to long long int.
674 * Furthermore, int_fast8_t, int_fast16_t and
675 * int_fast32_t are equivalent to int, and
676 * int_fast64_t is equivalent to long long int.
677 */
678 flags &= ~(CHARINT|SHORTINT|LONGINT|LLONGINT|INTMAXT);
679 if (fmt[0] == 'f') {
680 flags |= FASTINT;
681 fmt++;
682 } else {
683 flags &= ~FASTINT;
684 }
685 if (fmt[0] == '8') {
686 if (!(flags & FASTINT))
687 flags |= CHARINT;
688 else
689 /* no flag set = 32 */ ;
690 fmt += 1;
691 } else if (fmt[0] == '1' && fmt[1] == '6') {
692 if (!(flags & FASTINT))
693 flags |= SHORTINT;
694 else
695 /* no flag set = 32 */ ;
696 fmt += 2;
697 } else if (fmt[0] == '3' && fmt[1] == '2') {
698 /* no flag set = 32 */ ;
699 fmt += 2;
700 } else if (fmt[0] == '6' && fmt[1] == '4') {
701 flags |= LLONGINT;
702 fmt += 2;
703 } else {
704 if (flags & FASTINT) {
705 flags &= ~FASTINT;
706 fmt--;
707 }
708 goto invalid;
709 }
710 goto rflag;
711 case 'z':
712 flags |= SIZET;
713 goto rflag;
714 case 'B':
715 case 'b':
716 if (flags & INTMAX_SIZE)
717 ujval = UJARG();
718 else
719 ulval = UARG();
720 base = 2;
721 /* leading 0b/B only if non-zero */
722 if (flags & ALT &&
723 (flags & INTMAX_SIZE ? ujval != 0 : ulval != 0))
724 ox[1] = ch;
725 goto nosign;
726 break;
727 case 'C':
728 flags |= LONGINT;
729 /*FALLTHROUGH*/
730 case 'c':
731 if (flags & LONGINT)
732 *(cp = buf) = (wchar_t)GETARG(wint_t);
733 else
734 *(cp = buf) = (wchar_t)btowc(GETARG(int));
735 size = 1;
736 sign = '\0';
737 break;
738 case 'D':
739 flags |= LONGINT;
740 /*FALLTHROUGH*/
741 case 'd':
742 case 'i':
743 if (flags & INTMAX_SIZE) {
744 ujval = SJARG();
745 if ((intmax_t)ujval < 0) {
746 ujval = -ujval;
747 sign = '-';
748 }
749 } else {
750 ulval = SARG();
751 if ((long)ulval < 0) {
752 ulval = -ulval;
753 sign = '-';
754 }
755 }
756 base = 10;
757 goto number;
758 case 'a':
759 case 'A':
760 if (ch == 'a') {
761 ox[1] = 'x';
762 xdigs = xdigs_lower;
763 expchar = 'p';
764 } else {
765 ox[1] = 'X';
766 xdigs = xdigs_upper;
767 expchar = 'P';
768 }
769 if (prec >= 0)
770 prec++;
771 if (flags & LONGDBL) {
772 fparg.ldbl = GETARG(long double);
773 dtoaresult =
774 __hldtoa(fparg.ldbl, xdigs, prec,
775 &expt, &signflag, &dtoaend);
776 } else {
777 fparg.dbl = GETARG(double);
778 dtoaresult =
779 __hdtoa(fparg.dbl, xdigs, prec,
780 &expt, &signflag, &dtoaend);
781 }
782 if (prec < 0)
783 prec = dtoaend - dtoaresult;
784 if (expt == INT_MAX)
785 ox[1] = '\0';
786 if (convbuf != NULL)
787 free(convbuf);
788 ndig = dtoaend - dtoaresult;
789 cp = convbuf = __mbsconv(dtoaresult, -1);
790 freedtoa(dtoaresult);
791 goto fp_common;
792 case 'e':
793 case 'E':
794 expchar = ch;
795 if (prec < 0) /* account for digit before decpt */
796 prec = DEFPREC + 1;
797 else
798 prec++;
799 goto fp_begin;
800 case 'f':
801 case 'F':
802 expchar = '\0';
803 goto fp_begin;
804 case 'g':
805 case 'G':
806 expchar = ch - ('g' - 'e');
807 if (prec == 0)
808 prec = 1;
809 fp_begin:
810 if (prec < 0)
811 prec = DEFPREC;
812 if (convbuf != NULL)
813 free(convbuf);
814 if (flags & LONGDBL) {
815 fparg.ldbl = GETARG(long double);
816 dtoaresult =
817 __ldtoa(&fparg.ldbl, expchar ? 2 : 3, prec,
818 &expt, &signflag, &dtoaend);
819 } else {
820 fparg.dbl = GETARG(double);
821 dtoaresult =
822 dtoa(fparg.dbl, expchar ? 2 : 3, prec,
823 &expt, &signflag, &dtoaend);
824 if (expt == 9999)
825 expt = INT_MAX;
826 }
827 ndig = dtoaend - dtoaresult;
828 cp = convbuf = __mbsconv(dtoaresult, -1);
829 freedtoa(dtoaresult);
830 fp_common:
831 if (signflag)
832 sign = '-';
833 if (expt == INT_MAX) { /* inf or nan */
834 if (*cp == 'N') {
835 cp = (ch >= 'a') ? L"nan" : L"NAN";
836 sign = '\0';
837 } else
838 cp = (ch >= 'a') ? L"inf" : L"INF";
839 size = 3;
840 flags &= ~ZEROPAD;
841 break;
842 }
843 flags |= FPT;
844 if (ch == 'g' || ch == 'G') {
845 if (expt > -4 && expt <= prec) {
846 /* Make %[gG] smell like %[fF] */
847 expchar = '\0';
848 if (flags & ALT)
849 prec -= expt;
850 else
851 prec = ndig - expt;
852 if (prec < 0)
853 prec = 0;
854 } else {
855 /*
856 * Make %[gG] smell like %[eE], but
857 * trim trailing zeroes if no # flag.
858 */
859 if (!(flags & ALT))
860 prec = ndig;
861 }
862 }
863 if (expchar) {
864 expsize = exponent(expstr, expt - 1, expchar);
865 size = expsize + prec;
866 if (prec > 1 || flags & ALT)
867 ++size;
868 } else {
869 /* space for digits before decimal point */
870 if (expt > 0)
871 size = expt;
872 else /* "0" */
873 size = 1;
874 /* space for decimal pt and following digits */
875 if (prec || flags & ALT)
876 size += prec + 1;
877 if ((flags & GROUPING) && expt > 0)
878 size += grouping_init(&gs, expt, locale);
879 }
880 break;
881 case 'n':
882 /*
883 * Assignment-like behavior is specified if the
884 * value overflows or is otherwise unrepresentable.
885 * C99 says to use `signed char' for %hhn conversions.
886 */
887 if (flags & LLONGINT)
888 *GETARG(long long *) = ret;
889 else if (flags & SIZET)
890 *GETARG(ssize_t *) = (ssize_t)ret;
891 else if (flags & PTRDIFFT)
892 *GETARG(ptrdiff_t *) = ret;
893 else if (flags & INTMAXT)
894 *GETARG(intmax_t *) = ret;
895 else if (flags & LONGINT)
896 *GETARG(long *) = ret;
897 else if (flags & SHORTINT)
898 *GETARG(short *) = ret;
899 else if (flags & CHARINT)
900 *GETARG(signed char *) = ret;
901 else
902 *GETARG(int *) = ret;
903 continue; /* no output */
904 case 'O':
905 flags |= LONGINT;
906 /*FALLTHROUGH*/
907 case 'o':
908 if (flags & INTMAX_SIZE)
909 ujval = UJARG();
910 else
911 ulval = UARG();
912 base = 8;
913 goto nosign;
914 case 'p':
915 /*-
916 * ``The argument shall be a pointer to void. The
917 * value of the pointer is converted to a sequence
918 * of printable characters, in an implementation-
919 * defined manner.''
920 * -- ANSI X3J11
921 */
922 ujval = (uintmax_t)(uintptr_t)GETARG(void *);
923 base = 16;
924 xdigs = xdigs_lower;
925 flags = flags | INTMAXT;
926 ox[1] = 'x';
927 goto nosign;
928 case 'S':
929 flags |= LONGINT;
930 /*FALLTHROUGH*/
931 case 's':
932 if (flags & LONGINT) {
933 if ((cp = GETARG(wchar_t *)) == NULL)
934 cp = L"(null)";
935 } else {
936 char *mbp;
937
938 if (convbuf != NULL)
939 free(convbuf);
940 if ((mbp = GETARG(char *)) == NULL)
941 cp = L"(null)";
942 else {
943 convbuf = __mbsconv(mbp, prec);
944 if (convbuf == NULL) {
945 fp->_flags |= __SERR;
946 goto error;
947 }
948 cp = convbuf;
949 }
950 }
951 size = (prec >= 0) ? wcsnlen(cp, prec) : wcslen(cp);
952 sign = '\0';
953 break;
954 case 'U':
955 flags |= LONGINT;
956 /*FALLTHROUGH*/
957 case 'u':
958 if (flags & INTMAX_SIZE)
959 ujval = UJARG();
960 else
961 ulval = UARG();
962 base = 10;
963 goto nosign;
964 case 'X':
965 xdigs = xdigs_upper;
966 goto hex;
967 case 'x':
968 xdigs = xdigs_lower;
969 hex:
970 if (flags & INTMAX_SIZE)
971 ujval = UJARG();
972 else
973 ulval = UARG();
974 base = 16;
975 /* leading 0x/X only if non-zero */
976 if (flags & ALT &&
977 (flags & INTMAX_SIZE ? ujval != 0 : ulval != 0))
978 ox[1] = ch;
979
980 flags &= ~GROUPING;
981 /* unsigned conversions */
982 nosign: sign = '\0';
983 /*-
984 * ``... diouXx conversions ... if a precision is
985 * specified, the 0 flag will be ignored.''
986 * -- ANSI X3J11
987 */
988 number: if ((dprec = prec) >= 0)
989 flags &= ~ZEROPAD;
990
991 /*-
992 * ``The result of converting a zero value with an
993 * explicit precision of zero is no characters.''
994 * -- ANSI X3J11
995 *
996 * ``The C Standard is clear enough as is. The call
997 * printf("%#.0o", 0) should print 0.''
998 * -- Defect Report #151
999 */
1000 cp = buf + BUF;
1001 if (flags & INTMAX_SIZE) {
1002 if (ujval != 0 || prec != 0 ||
1003 (flags & ALT && base == 8))
1004 cp = __ujtoa(ujval, cp, base,
1005 flags & ALT, xdigs);
1006 } else {
1007 if (ulval != 0 || prec != 0 ||
1008 (flags & ALT && base == 8))
1009 cp = __ultoa(ulval, cp, base,
1010 flags & ALT, xdigs);
1011 }
1012 size = buf + BUF - cp;
1013 if (size > BUF) /* should never happen */
1014 abort();
1015 if ((flags & GROUPING) && size != 0)
1016 size += grouping_init(&gs, size, locale);
1017 break;
1018 default: /* "%?" prints ?, unless ? is NUL */
1019 if (ch == '\0')
1020 goto done;
1021 invalid:
1022 /* pretend it was %c with argument ch */
1023 cp = buf;
1024 *cp = ch;
1025 size = 1;
1026 sign = '\0';
1027 break;
1028 }
1029
1030 /*
1031 * All reasonable formats wind up here. At this point, `cp'
1032 * points to a string which (if not flags&LADJUST) should be
1033 * padded out to `width' places. If flags&ZEROPAD, it should
1034 * first be prefixed by any sign or other prefix; otherwise,
1035 * it should be blank padded before the prefix is emitted.
1036 * After any left-hand padding and prefixing, emit zeroes
1037 * required by a decimal [diouxX] precision, then print the
1038 * string proper, then emit zeroes required by any leftover
1039 * floating precision; finally, if LADJUST, pad with blanks.
1040 *
1041 * Compute actual size, so we know how much to pad.
1042 * size excludes decimal prec; realsz includes it.
1043 */
1044 realsz = dprec > size ? dprec : size;
1045 if (sign)
1046 realsz++;
1047 if (ox[1])
1048 realsz += 2;
1049
1050 prsize = width > realsz ? width : realsz;
1051 if ((unsigned)ret + prsize > INT_MAX) {
1052 ret = EOF;
1053 errno = EOVERFLOW;
1054 goto error;
1055 }
1056
1057 /* right-adjusting blank padding */
1058 if ((flags & (LADJUST|ZEROPAD)) == 0)
1059 PAD(width - realsz, blanks);
1060
1061 /* prefix */
1062 if (sign)
1063 PRINT(&sign, 1);
1064
1065 if (ox[1]) { /* ox[1] is either x, X, or \0 */
1066 ox[0] = '0';
1067 PRINT(ox, 2);
1068 }
1069
1070 /* right-adjusting zero padding */
1071 if ((flags & (LADJUST|ZEROPAD)) == ZEROPAD)
1072 PAD(width - realsz, zeroes);
1073
1074 /* the string or number proper */
1075 if ((flags & FPT) == 0) {
1076 /* leading zeroes from decimal precision */
1077 PAD(dprec - size, zeroes);
1078 if (gs.grouping) {
1079 if (grouping_print(&gs, &io, cp, buf+BUF, locale) < 0)
1080 goto error;
1081 } else {
1082 PRINT(cp, size);
1083 }
1084 } else { /* glue together f_p fragments */
1085 if (!expchar) { /* %[fF] or sufficiently short %[gG] */
1086 if (expt <= 0) {
1087 PRINT(zeroes, 1);
1088 if (prec || flags & ALT)
1089 PRINT(&decimal_point, 1);
1090 PAD(-expt, zeroes);
1091 /* already handled initial 0's */
1092 prec += expt;
1093 } else {
1094 if (gs.grouping) {
1095 n = grouping_print(&gs, &io,
1096 cp, convbuf + ndig, locale);
1097 if (n < 0)
1098 goto error;
1099 cp += n;
1100 } else {
1101 PRINTANDPAD(cp, convbuf + ndig,
1102 expt, zeroes);
1103 cp += expt;
1104 }
1105 if (prec || flags & ALT)
1106 PRINT(&decimal_point, 1);
1107 }
1108 PRINTANDPAD(cp, convbuf + ndig, prec, zeroes);
1109 } else { /* %[eE] or sufficiently long %[gG] */
1110 if (prec > 1 || flags & ALT) {
1111 buf[0] = *cp++;
1112 buf[1] = decimal_point;
1113 PRINT(buf, 2);
1114 PRINT(cp, ndig-1);
1115 PAD(prec - ndig, zeroes);
1116 } else /* XeYYY */
1117 PRINT(cp, 1);
1118 PRINT(expstr, expsize);
1119 }
1120 }
1121 /* left-adjusting padding (always blank) */
1122 if (flags & LADJUST)
1123 PAD(width - realsz, blanks);
1124
1125 /* finally, adjust ret */
1126 ret += prsize;
1127
1128 FLUSH(); /* copy out the I/O vectors */
1129 }
1130 done:
1131 FLUSH();
1132 error:
1133 va_end(orgap);
1134 if (convbuf != NULL)
1135 free(convbuf);
1136 if (__sferror(fp))
1137 ret = EOF;
1138 else
1139 fp->_flags |= savserr;
1140 if ((argtable != NULL) && (argtable != statargtable))
1141 free (argtable);
1142 return (ret);
1143 /* NOTREACHED */
1144 }
1145