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[apple/libc.git] / stdio / FreeBSD / vfwprintf.c
1 /*-
2 * Copyright (c) 1990, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * This code is derived from software contributed to Berkeley by
6 * Chris Torek.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 4. Neither the name of the University nor the names of its contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 */
32
33 #if 0
34 #if defined(LIBC_SCCS) && !defined(lint)
35 static char sccsid[] = "@(#)vfprintf.c 8.1 (Berkeley) 6/4/93";
36 #endif /* LIBC_SCCS and not lint */
37 #endif
38 #include <sys/cdefs.h>
39 __FBSDID("$FreeBSD: src/lib/libc/stdio/vfwprintf.c,v 1.42 2009/11/25 04:27:55 wollman Exp $");
40
41 /*
42 * Actual wprintf innards.
43 *
44 * Avoid making gratuitous changes to this source file; it should be kept
45 * as close as possible to vfprintf.c for ease of maintenance.
46 */
47
48 #include "namespace.h"
49 #include <sys/types.h>
50
51 #include <ctype.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
69 static int __sprint(FILE *, struct __suio *);
70 static int __sbprintf(FILE *, const wchar_t *, va_list) __noinline;
71 static wint_t __xfputwc(wchar_t, FILE *);
72 static wchar_t *__mbsconv(char *, int);
73
74 #define CHAR wchar_t
75 #include "printfcommon.h"
76
77 struct grouping_state {
78 wchar_t thousands_sep; /* locale-specific thousands separator */
79 const char *grouping; /* locale-specific numeric grouping rules */
80 int lead; /* sig figs before decimal or group sep */
81 int nseps; /* number of group separators with ' */
82 int nrepeats; /* number of repeats of the last group */
83 };
84
85 static const mbstate_t initial_mbs;
86
87 static inline wchar_t
88 get_decpt(void)
89 {
90 mbstate_t mbs;
91 wchar_t decpt;
92 int nconv;
93
94 mbs = initial_mbs;
95 nconv = mbrtowc(&decpt, localeconv()->decimal_point, MB_CUR_MAX, &mbs);
96 if (nconv == (size_t)-1 || nconv == (size_t)-2)
97 decpt = '.'; /* failsafe */
98 return (decpt);
99 }
100
101 static inline wchar_t
102 get_thousep(void)
103 {
104 mbstate_t mbs;
105 wchar_t thousep;
106 int nconv;
107
108 mbs = initial_mbs;
109 nconv = mbrtowc(&thousep, localeconv()->thousands_sep,
110 MB_CUR_MAX, &mbs);
111 if (nconv == (size_t)-1 || nconv == (size_t)-2)
112 thousep = '\0'; /* failsafe */
113 return (thousep);
114 }
115
116 /*
117 * Initialize the thousands' grouping state in preparation to print a
118 * number with ndigits digits. This routine returns the total number
119 * of wide characters that will be printed.
120 */
121 static int
122 grouping_init(struct grouping_state *gs, int ndigits)
123 {
124
125 gs->grouping = localeconv()->grouping;
126 gs->thousands_sep = get_thousep();
127
128 gs->nseps = gs->nrepeats = 0;
129 gs->lead = ndigits;
130 while (*gs->grouping != CHAR_MAX) {
131 if (gs->lead <= *gs->grouping)
132 break;
133 gs->lead -= *gs->grouping;
134 if (*(gs->grouping+1)) {
135 gs->nseps++;
136 gs->grouping++;
137 } else
138 gs->nrepeats++;
139 }
140 return (gs->nseps + gs->nrepeats);
141 }
142
143 /*
144 * Print a number with thousands' separators.
145 */
146 static int
147 grouping_print(struct grouping_state *gs, struct io_state *iop,
148 const CHAR *cp, const CHAR *ep)
149 {
150 const CHAR *cp0 = cp;
151
152 if (io_printandpad(iop, cp, ep, gs->lead, zeroes))
153 return (-1);
154 cp += gs->lead;
155 while (gs->nseps > 0 || gs->nrepeats > 0) {
156 if (gs->nrepeats > 0)
157 gs->nrepeats--;
158 else {
159 gs->grouping--;
160 gs->nseps--;
161 }
162 if (io_print(iop, &gs->thousands_sep, 1))
163 return (-1);
164 if (io_printandpad(iop, cp, ep, *gs->grouping, zeroes))
165 return (-1);
166 cp += *gs->grouping;
167 }
168 if (cp > ep)
169 cp = ep;
170 return (cp - cp0);
171 }
172
173
174 /*
175 * Flush out all the vectors defined by the given uio,
176 * then reset it so that it can be reused.
177 *
178 * XXX The fact that we do this a character at a time and convert to a
179 * multibyte character sequence even if the destination is a wide
180 * string eclipses the benefits of buffering.
181 */
182 static int
183 __sprint(FILE *fp, struct __suio *uio)
184 {
185 struct __siov *iov;
186 wchar_t *p;
187 int i, len;
188
189 iov = uio->uio_iov;
190 for (; uio->uio_resid != 0; uio->uio_resid -= len, iov++) {
191 p = (wchar_t *)iov->iov_base;
192 len = iov->iov_len;
193 for (i = 0; i < len; i++) {
194 if (__xfputwc(p[i], fp) == WEOF)
195 return (-1);
196 }
197 }
198 uio->uio_iovcnt = 0;
199 return (0);
200 }
201
202 /*
203 * Helper function for `fprintf to unbuffered unix file': creates a
204 * temporary buffer. We only work on write-only files; this avoids
205 * worries about ungetc buffers and so forth.
206 */
207 static int
208 __sbprintf(FILE *fp, const wchar_t *fmt, va_list ap)
209 {
210 int ret;
211 FILE fake;
212 unsigned char buf[BUFSIZ];
213
214 /* XXX This is probably not needed. */
215 if (prepwrite(fp) != 0)
216 return (EOF);
217
218 /* copy the important variables */
219 fake._flags = fp->_flags & ~__SNBF;
220 fake._file = fp->_file;
221 fake._cookie = fp->_cookie;
222 fake._write = fp->_write;
223 fake._orientation = fp->_orientation;
224 fake._mbstate = fp->_mbstate;
225
226 /* set up the buffer */
227 fake._bf._base = fake._p = buf;
228 fake._bf._size = fake._w = sizeof(buf);
229 fake._lbfsize = 0; /* not actually used, but Just In Case */
230
231 /* do the work, then copy any error status */
232 ret = __vfwprintf(&fake, fmt, ap);
233 if (ret >= 0 && __fflush(&fake))
234 ret = WEOF;
235 if (fake._flags & __SERR)
236 fp->_flags |= __SERR;
237 return (ret);
238 }
239
240 /*
241 * Like __fputwc, but handles fake string (__SSTR) files properly.
242 * File must already be locked.
243 */
244 static wint_t
245 __xfputwc(wchar_t wc, FILE *fp)
246 {
247 mbstate_t mbs;
248 char buf[MB_LEN_MAX];
249 struct __suio uio;
250 struct __siov iov;
251 size_t len;
252
253 if ((fp->_flags & __SSTR) == 0)
254 return (__fputwc(wc, fp));
255
256 mbs = initial_mbs;
257 if ((len = wcrtomb(buf, wc, &mbs)) == (size_t)-1) {
258 fp->_flags |= __SERR;
259 return (WEOF);
260 }
261 uio.uio_iov = &iov;
262 uio.uio_resid = len;
263 uio.uio_iovcnt = 1;
264 iov.iov_base = buf;
265 iov.iov_len = len;
266 return (__sfvwrite(fp, &uio) != EOF ? (wint_t)wc : WEOF);
267 }
268
269 /*
270 * Convert a multibyte character string argument for the %s format to a wide
271 * string representation. ``prec'' specifies the maximum number of bytes
272 * to output. If ``prec'' is greater than or equal to zero, we can't assume
273 * that the multibyte char. string ends in a null character.
274 */
275 static wchar_t *
276 __mbsconv(char *mbsarg, int prec)
277 {
278 mbstate_t mbs;
279 wchar_t *convbuf, *wcp;
280 const char *p;
281 size_t insize, nchars, nconv;
282
283 if (mbsarg == NULL)
284 return (NULL);
285
286 /*
287 * Supplied argument is a multibyte string; convert it to wide
288 * characters first.
289 */
290 if (prec >= 0) {
291 /*
292 * String is not guaranteed to be NUL-terminated. Find the
293 * number of characters to print.
294 */
295 p = mbsarg;
296 insize = nchars = nconv = 0;
297 mbs = initial_mbs;
298 while (nchars != (size_t)prec) {
299 nconv = mbrlen(p, MB_CUR_MAX, &mbs);
300 if (nconv == 0 || nconv == (size_t)-1 ||
301 nconv == (size_t)-2)
302 break;
303 p += nconv;
304 nchars++;
305 insize += nconv;
306 }
307 if (nconv == (size_t)-1 || nconv == (size_t)-2)
308 return (NULL);
309 } else {
310 insize = strlen(mbsarg);
311 nconv = 0;
312 }
313
314 /*
315 * Allocate buffer for the result and perform the conversion,
316 * converting at most `size' bytes of the input multibyte string to
317 * wide characters for printing.
318 */
319 convbuf = malloc((insize + 1) * sizeof(*convbuf));
320 if (convbuf == NULL)
321 return (NULL);
322 wcp = convbuf;
323 p = mbsarg;
324 mbs = initial_mbs;
325 while (insize != 0) {
326 nconv = mbrtowc(wcp, p, insize, &mbs);
327 if (nconv == 0 || nconv == (size_t)-1 || nconv == (size_t)-2)
328 break;
329 wcp++;
330 p += nconv;
331 insize -= nconv;
332 }
333 if (nconv == (size_t)-1 || nconv == (size_t)-2) {
334 free(convbuf);
335 return (NULL);
336 }
337 *wcp = L'\0';
338
339 return (convbuf);
340 }
341
342 /*
343 * MT-safe version
344 */
345 int
346 vfwprintf(FILE * __restrict fp, const wchar_t * __restrict fmt0, va_list ap)
347
348 {
349 int ret;
350
351 FLOCKFILE(fp);
352 /* optimise fprintf(stderr) (and other unbuffered Unix files) */
353 if ((fp->_flags & (__SNBF|__SWR|__SRW)) == (__SNBF|__SWR) &&
354 fp->_file >= 0)
355 ret = __sbprintf(fp, fmt0, ap);
356 else
357 ret = __vfwprintf(fp, fmt0, ap);
358 FUNLOCKFILE(fp);
359 return (ret);
360 }
361
362 /*
363 * The size of the buffer we use as scratch space for integer
364 * conversions, among other things. We need enough space to
365 * write a uintmax_t in octal (plus one byte).
366 */
367 #if UINTMAX_MAX <= UINT64_MAX
368 #define BUF 32
369 #else
370 #error "BUF must be large enough to format a uintmax_t"
371 #endif
372
373 /*
374 * Non-MT-safe version
375 */
376 int
377 __vfwprintf(FILE *fp, const wchar_t *fmt0, va_list ap)
378 {
379 wchar_t *fmt; /* format string */
380 wchar_t ch; /* character from fmt */
381 int n, n2; /* handy integer (short term usage) */
382 wchar_t *cp; /* handy char pointer (short term usage) */
383 int flags; /* flags as above */
384 int ret; /* return value accumulator */
385 int width; /* width from format (%8d), or 0 */
386 int prec; /* precision from format; <0 for N/A */
387 wchar_t sign; /* sign prefix (' ', '+', '-', or \0) */
388 struct grouping_state gs; /* thousands' grouping info */
389 #ifndef NO_FLOATING_POINT
390 /*
391 * We can decompose the printed representation of floating
392 * point numbers into several parts, some of which may be empty:
393 *
394 * [+|-| ] [0x|0X] MMM . NNN [e|E|p|P] [+|-] ZZ
395 * A B ---C--- D E F
396 *
397 * A: 'sign' holds this value if present; '\0' otherwise
398 * B: ox[1] holds the 'x' or 'X'; '\0' if not hexadecimal
399 * C: cp points to the string MMMNNN. Leading and trailing
400 * zeros are not in the string and must be added.
401 * D: expchar holds this character; '\0' if no exponent, e.g. %f
402 * F: at least two digits for decimal, at least one digit for hex
403 */
404 wchar_t decimal_point; /* locale specific decimal point */
405 int signflag; /* true if float is negative */
406 union { /* floating point arguments %[aAeEfFgG] */
407 double dbl;
408 long double ldbl;
409 } fparg;
410 int expt; /* integer value of exponent */
411 char expchar; /* exponent character: [eEpP\0] */
412 char *dtoaend; /* pointer to end of converted digits */
413 int expsize; /* character count for expstr */
414 int ndig; /* actual number of digits returned by dtoa */
415 wchar_t expstr[MAXEXPDIG+2]; /* buffer for exponent string: e+ZZZ */
416 char *dtoaresult; /* buffer allocated by dtoa */
417 #endif
418 u_long ulval; /* integer arguments %[diouxX] */
419 uintmax_t ujval; /* %j, %ll, %q, %t, %z integers */
420 int base; /* base for [diouxX] conversion */
421 int dprec; /* a copy of prec if [diouxX], 0 otherwise */
422 int realsz; /* field size expanded by dprec, sign, etc */
423 int size; /* size of converted field or string */
424 int prsize; /* max size of printed field */
425 const char *xdigs; /* digits for [xX] conversion */
426 struct io_state io; /* I/O buffering state */
427 wchar_t buf[BUF]; /* buffer with space for digits of uintmax_t */
428 wchar_t ox[2]; /* space for 0x hex-prefix */
429 union arg *argtable; /* args, built due to positional arg */
430 union arg statargtable [STATIC_ARG_TBL_SIZE];
431 int nextarg; /* 1-based argument index */
432 va_list orgap; /* original argument pointer */
433 wchar_t *convbuf; /* multibyte to wide conversion result */
434
435 static const char xdigs_lower[16] = "0123456789abcdef";
436 static const char xdigs_upper[16] = "0123456789ABCDEF";
437
438 /* BEWARE, these `goto error' on error. */
439 #define PRINT(ptr, len) do { \
440 if (io_print(&io, (ptr), (len))) \
441 goto error; \
442 } while (0)
443 #define PAD(howmany, with) { \
444 if (io_pad(&io, (howmany), (with))) \
445 goto error; \
446 }
447 #define PRINTANDPAD(p, ep, len, with) { \
448 if (io_printandpad(&io, (p), (ep), (len), (with))) \
449 goto error; \
450 }
451 #define FLUSH() { \
452 if (io_flush(&io)) \
453 goto error; \
454 }
455
456 /*
457 * Get the argument indexed by nextarg. If the argument table is
458 * built, use it to get the argument. If its not, get the next
459 * argument (and arguments must be gotten sequentially).
460 */
461 #define GETARG(type) \
462 ((argtable != NULL) ? *((type*)(&argtable[nextarg++])) : \
463 (nextarg++, va_arg(ap, type)))
464
465 /*
466 * To extend shorts properly, we need both signed and unsigned
467 * argument extraction methods.
468 */
469 #define SARG() \
470 (flags&LONGINT ? GETARG(long) : \
471 flags&SHORTINT ? (long)(short)GETARG(int) : \
472 flags&CHARINT ? (long)(signed char)GETARG(int) : \
473 (long)GETARG(int))
474 #define UARG() \
475 (flags&LONGINT ? GETARG(u_long) : \
476 flags&SHORTINT ? (u_long)(u_short)GETARG(int) : \
477 flags&CHARINT ? (u_long)(u_char)GETARG(int) : \
478 (u_long)GETARG(u_int))
479 #define INTMAX_SIZE (INTMAXT|SIZET|PTRDIFFT|LLONGINT)
480 #define SJARG() \
481 (flags&INTMAXT ? GETARG(intmax_t) : \
482 flags&SIZET ? (intmax_t)GETARG(ssize_t) : \
483 flags&PTRDIFFT ? (intmax_t)GETARG(ptrdiff_t) : \
484 (intmax_t)GETARG(long long))
485 #define UJARG() \
486 (flags&INTMAXT ? GETARG(uintmax_t) : \
487 flags&SIZET ? (uintmax_t)GETARG(size_t) : \
488 flags&PTRDIFFT ? (uintmax_t)GETARG(ptrdiff_t) : \
489 (uintmax_t)GETARG(unsigned long long))
490
491 /*
492 * Get * arguments, including the form *nn$. Preserve the nextarg
493 * that the argument can be gotten once the type is determined.
494 */
495 #define GETASTER(val) \
496 n2 = 0; \
497 cp = fmt; \
498 while (is_digit(*cp)) { \
499 n2 = 10 * n2 + to_digit(*cp); \
500 cp++; \
501 } \
502 if (*cp == '$') { \
503 int hold = nextarg; \
504 if (argtable == NULL) { \
505 argtable = statargtable; \
506 if (__find_warguments (fmt0, orgap, &argtable)) { \
507 ret = EOF; \
508 goto error; \
509 } \
510 } \
511 nextarg = n2; \
512 val = GETARG (int); \
513 nextarg = hold; \
514 fmt = ++cp; \
515 } else { \
516 val = GETARG (int); \
517 }
518
519
520 /* sorry, fwprintf(read_only_file, L"") returns WEOF, not 0 */
521 if (prepwrite(fp) != 0)
522 return (EOF);
523
524 convbuf = NULL;
525 fmt = (wchar_t *)fmt0;
526 argtable = NULL;
527 nextarg = 1;
528 va_copy(orgap, ap);
529 io_init(&io, fp);
530 ret = 0;
531 #ifndef NO_FLOATING_POINT
532 decimal_point = get_decpt();
533 #endif
534
535 /*
536 * Scan the format for conversions (`%' character).
537 */
538 for (;;) {
539 for (cp = fmt; (ch = *fmt) != '\0' && ch != '%'; fmt++)
540 /* void */;
541 if ((n = fmt - cp) != 0) {
542 if ((unsigned)ret + n > INT_MAX) {
543 ret = EOF;
544 goto error;
545 }
546 PRINT(cp, n);
547 ret += n;
548 }
549 if (ch == '\0')
550 goto done;
551 fmt++; /* skip over '%' */
552
553 flags = 0;
554 dprec = 0;
555 width = 0;
556 prec = -1;
557 gs.grouping = NULL;
558 sign = '\0';
559 ox[1] = '\0';
560
561 rflag: ch = *fmt++;
562 reswitch: switch (ch) {
563 case ' ':
564 /*-
565 * ``If the space and + flags both appear, the space
566 * flag will be ignored.''
567 * -- ANSI X3J11
568 */
569 if (!sign)
570 sign = ' ';
571 goto rflag;
572 case '#':
573 flags |= ALT;
574 goto rflag;
575 case '*':
576 /*-
577 * ``A negative field width argument is taken as a
578 * - flag followed by a positive field width.''
579 * -- ANSI X3J11
580 * They don't exclude field widths read from args.
581 */
582 GETASTER (width);
583 if (width >= 0)
584 goto rflag;
585 width = -width;
586 /* FALLTHROUGH */
587 case '-':
588 flags |= LADJUST;
589 goto rflag;
590 case '+':
591 sign = '+';
592 goto rflag;
593 case '\'':
594 flags |= GROUPING;
595 goto rflag;
596 case '.':
597 if ((ch = *fmt++) == '*') {
598 GETASTER (prec);
599 goto rflag;
600 }
601 prec = 0;
602 while (is_digit(ch)) {
603 prec = 10 * prec + to_digit(ch);
604 ch = *fmt++;
605 }
606 goto reswitch;
607 case '0':
608 /*-
609 * ``Note that 0 is taken as a flag, not as the
610 * beginning of a field width.''
611 * -- ANSI X3J11
612 */
613 flags |= ZEROPAD;
614 goto rflag;
615 case '1': case '2': case '3': case '4':
616 case '5': case '6': case '7': case '8': case '9':
617 n = 0;
618 do {
619 n = 10 * n + to_digit(ch);
620 ch = *fmt++;
621 } while (is_digit(ch));
622 if (ch == '$') {
623 nextarg = n;
624 if (argtable == NULL) {
625 argtable = statargtable;
626 if (__find_warguments (fmt0, orgap,
627 &argtable)) {
628 ret = EOF;
629 goto error;
630 }
631 }
632 goto rflag;
633 }
634 width = n;
635 goto reswitch;
636 #ifndef NO_FLOATING_POINT
637 case 'L':
638 flags |= LONGDBL;
639 goto rflag;
640 #endif
641 case 'h':
642 if (flags & SHORTINT) {
643 flags &= ~SHORTINT;
644 flags |= CHARINT;
645 } else
646 flags |= SHORTINT;
647 goto rflag;
648 case 'j':
649 flags |= INTMAXT;
650 goto rflag;
651 case 'l':
652 if (flags & LONGINT) {
653 flags &= ~LONGINT;
654 flags |= LLONGINT;
655 } else
656 flags |= LONGINT;
657 goto rflag;
658 case 'q':
659 flags |= LLONGINT; /* not necessarily */
660 goto rflag;
661 case 't':
662 flags |= PTRDIFFT;
663 goto rflag;
664 case 'z':
665 flags |= SIZET;
666 goto rflag;
667 case 'C':
668 flags |= LONGINT;
669 /*FALLTHROUGH*/
670 case 'c':
671 if (flags & LONGINT)
672 *(cp = buf) = (wchar_t)GETARG(wint_t);
673 else
674 *(cp = buf) = (wchar_t)btowc(GETARG(int));
675 size = 1;
676 sign = '\0';
677 break;
678 case 'D':
679 flags |= LONGINT;
680 /*FALLTHROUGH*/
681 case 'd':
682 case 'i':
683 if (flags & INTMAX_SIZE) {
684 ujval = SJARG();
685 if ((intmax_t)ujval < 0) {
686 ujval = -ujval;
687 sign = '-';
688 }
689 } else {
690 ulval = SARG();
691 if ((long)ulval < 0) {
692 ulval = -ulval;
693 sign = '-';
694 }
695 }
696 base = 10;
697 goto number;
698 #ifndef NO_FLOATING_POINT
699 case 'a':
700 case 'A':
701 if (ch == 'a') {
702 ox[1] = 'x';
703 xdigs = xdigs_lower;
704 expchar = 'p';
705 } else {
706 ox[1] = 'X';
707 xdigs = xdigs_upper;
708 expchar = 'P';
709 }
710 if (prec >= 0)
711 prec++;
712 if (flags & LONGDBL) {
713 fparg.ldbl = GETARG(long double);
714 dtoaresult =
715 __hldtoa(fparg.ldbl, xdigs, prec,
716 &expt, &signflag, &dtoaend);
717 } else {
718 fparg.dbl = GETARG(double);
719 dtoaresult =
720 __hdtoa(fparg.dbl, xdigs, prec,
721 &expt, &signflag, &dtoaend);
722 }
723 if (prec < 0)
724 prec = dtoaend - dtoaresult;
725 if (expt == INT_MAX)
726 ox[1] = '\0';
727 if (convbuf != NULL)
728 free(convbuf);
729 ndig = dtoaend - dtoaresult;
730 cp = convbuf = __mbsconv(dtoaresult, -1);
731 freedtoa(dtoaresult);
732 goto fp_common;
733 case 'e':
734 case 'E':
735 expchar = ch;
736 if (prec < 0) /* account for digit before decpt */
737 prec = DEFPREC + 1;
738 else
739 prec++;
740 goto fp_begin;
741 case 'f':
742 case 'F':
743 expchar = '\0';
744 goto fp_begin;
745 case 'g':
746 case 'G':
747 expchar = ch - ('g' - 'e');
748 if (prec == 0)
749 prec = 1;
750 fp_begin:
751 if (prec < 0)
752 prec = DEFPREC;
753 if (convbuf != NULL)
754 free(convbuf);
755 if (flags & LONGDBL) {
756 fparg.ldbl = GETARG(long double);
757 dtoaresult =
758 __ldtoa(&fparg.ldbl, expchar ? 2 : 3, prec,
759 &expt, &signflag, &dtoaend);
760 } else {
761 fparg.dbl = GETARG(double);
762 dtoaresult =
763 dtoa(fparg.dbl, expchar ? 2 : 3, prec,
764 &expt, &signflag, &dtoaend);
765 if (expt == 9999)
766 expt = INT_MAX;
767 }
768 ndig = dtoaend - dtoaresult;
769 cp = convbuf = __mbsconv(dtoaresult, -1);
770 freedtoa(dtoaresult);
771 fp_common:
772 if (signflag)
773 sign = '-';
774 if (expt == INT_MAX) { /* inf or nan */
775 if (*cp == 'N') {
776 cp = (ch >= 'a') ? L"nan" : L"NAN";
777 sign = '\0';
778 } else
779 cp = (ch >= 'a') ? L"inf" : L"INF";
780 size = 3;
781 flags &= ~ZEROPAD;
782 break;
783 }
784 flags |= FPT;
785 if (ch == 'g' || ch == 'G') {
786 if (expt > -4 && expt <= prec) {
787 /* Make %[gG] smell like %[fF] */
788 expchar = '\0';
789 if (flags & ALT)
790 prec -= expt;
791 else
792 prec = ndig - expt;
793 if (prec < 0)
794 prec = 0;
795 } else {
796 /*
797 * Make %[gG] smell like %[eE], but
798 * trim trailing zeroes if no # flag.
799 */
800 if (!(flags & ALT))
801 prec = ndig;
802 }
803 }
804 if (expchar) {
805 expsize = exponent(expstr, expt - 1, expchar);
806 size = expsize + prec;
807 if (prec > 1 || flags & ALT)
808 ++size;
809 } else {
810 /* space for digits before decimal point */
811 if (expt > 0)
812 size = expt;
813 else /* "0" */
814 size = 1;
815 /* space for decimal pt and following digits */
816 if (prec || flags & ALT)
817 size += prec + 1;
818 if ((flags & GROUPING) && expt > 0)
819 size += grouping_init(&gs, expt);
820 }
821 break;
822 #endif /* !NO_FLOATING_POINT */
823 case 'n':
824 /*
825 * Assignment-like behavior is specified if the
826 * value overflows or is otherwise unrepresentable.
827 * C99 says to use `signed char' for %hhn conversions.
828 */
829 if (flags & LLONGINT)
830 *GETARG(long long *) = ret;
831 else if (flags & SIZET)
832 *GETARG(ssize_t *) = (ssize_t)ret;
833 else if (flags & PTRDIFFT)
834 *GETARG(ptrdiff_t *) = ret;
835 else if (flags & INTMAXT)
836 *GETARG(intmax_t *) = ret;
837 else if (flags & LONGINT)
838 *GETARG(long *) = ret;
839 else if (flags & SHORTINT)
840 *GETARG(short *) = ret;
841 else if (flags & CHARINT)
842 *GETARG(signed char *) = ret;
843 else
844 *GETARG(int *) = ret;
845 continue; /* no output */
846 case 'O':
847 flags |= LONGINT;
848 /*FALLTHROUGH*/
849 case 'o':
850 if (flags & INTMAX_SIZE)
851 ujval = UJARG();
852 else
853 ulval = UARG();
854 base = 8;
855 goto nosign;
856 case 'p':
857 /*-
858 * ``The argument shall be a pointer to void. The
859 * value of the pointer is converted to a sequence
860 * of printable characters, in an implementation-
861 * defined manner.''
862 * -- ANSI X3J11
863 */
864 ujval = (uintmax_t)(uintptr_t)GETARG(void *);
865 base = 16;
866 xdigs = xdigs_lower;
867 flags = flags | INTMAXT;
868 ox[1] = 'x';
869 goto nosign;
870 case 'S':
871 flags |= LONGINT;
872 /*FALLTHROUGH*/
873 case 's':
874 if (flags & LONGINT) {
875 if ((cp = GETARG(wchar_t *)) == NULL)
876 cp = L"(null)";
877 } else {
878 char *mbp;
879
880 if (convbuf != NULL)
881 free(convbuf);
882 if ((mbp = GETARG(char *)) == NULL)
883 cp = L"(null)";
884 else {
885 convbuf = __mbsconv(mbp, prec);
886 if (convbuf == NULL) {
887 fp->_flags |= __SERR;
888 goto error;
889 }
890 cp = convbuf;
891 }
892 }
893 size = (prec >= 0) ? wcsnlen(cp, prec) : wcslen(cp);
894 sign = '\0';
895 break;
896 case 'U':
897 flags |= LONGINT;
898 /*FALLTHROUGH*/
899 case 'u':
900 if (flags & INTMAX_SIZE)
901 ujval = UJARG();
902 else
903 ulval = UARG();
904 base = 10;
905 goto nosign;
906 case 'X':
907 xdigs = xdigs_upper;
908 goto hex;
909 case 'x':
910 xdigs = xdigs_lower;
911 hex:
912 if (flags & INTMAX_SIZE)
913 ujval = UJARG();
914 else
915 ulval = UARG();
916 base = 16;
917 /* leading 0x/X only if non-zero */
918 if (flags & ALT &&
919 (flags & INTMAX_SIZE ? ujval != 0 : ulval != 0))
920 ox[1] = ch;
921
922 flags &= ~GROUPING;
923 /* unsigned conversions */
924 nosign: sign = '\0';
925 /*-
926 * ``... diouXx conversions ... if a precision is
927 * specified, the 0 flag will be ignored.''
928 * -- ANSI X3J11
929 */
930 number: if ((dprec = prec) >= 0)
931 flags &= ~ZEROPAD;
932
933 /*-
934 * ``The result of converting a zero value with an
935 * explicit precision of zero is no characters.''
936 * -- ANSI X3J11
937 *
938 * ``The C Standard is clear enough as is. The call
939 * printf("%#.0o", 0) should print 0.''
940 * -- Defect Report #151
941 */
942 cp = buf + BUF;
943 if (flags & INTMAX_SIZE) {
944 if (ujval != 0 || prec != 0 ||
945 (flags & ALT && base == 8))
946 cp = __ujtoa(ujval, cp, base,
947 flags & ALT, xdigs);
948 } else {
949 if (ulval != 0 || prec != 0 ||
950 (flags & ALT && base == 8))
951 cp = __ultoa(ulval, cp, base,
952 flags & ALT, xdigs);
953 }
954 size = buf + BUF - cp;
955 if (size > BUF) /* should never happen */
956 abort();
957 if ((flags & GROUPING) && size != 0)
958 size += grouping_init(&gs, size);
959 break;
960 default: /* "%?" prints ?, unless ? is NUL */
961 if (ch == '\0')
962 goto done;
963 /* pretend it was %c with argument ch */
964 cp = buf;
965 *cp = ch;
966 size = 1;
967 sign = '\0';
968 break;
969 }
970
971 /*
972 * All reasonable formats wind up here. At this point, `cp'
973 * points to a string which (if not flags&LADJUST) should be
974 * padded out to `width' places. If flags&ZEROPAD, it should
975 * first be prefixed by any sign or other prefix; otherwise,
976 * it should be blank padded before the prefix is emitted.
977 * After any left-hand padding and prefixing, emit zeroes
978 * required by a decimal [diouxX] precision, then print the
979 * string proper, then emit zeroes required by any leftover
980 * floating precision; finally, if LADJUST, pad with blanks.
981 *
982 * Compute actual size, so we know how much to pad.
983 * size excludes decimal prec; realsz includes it.
984 */
985 realsz = dprec > size ? dprec : size;
986 if (sign)
987 realsz++;
988 if (ox[1])
989 realsz += 2;
990
991 prsize = width > realsz ? width : realsz;
992 if ((unsigned)ret + prsize > INT_MAX) {
993 ret = EOF;
994 goto error;
995 }
996
997 /* right-adjusting blank padding */
998 if ((flags & (LADJUST|ZEROPAD)) == 0)
999 PAD(width - realsz, blanks);
1000
1001 /* prefix */
1002 if (sign)
1003 PRINT(&sign, 1);
1004
1005 if (ox[1]) { /* ox[1] is either x, X, or \0 */
1006 ox[0] = '0';
1007 PRINT(ox, 2);
1008 }
1009
1010 /* right-adjusting zero padding */
1011 if ((flags & (LADJUST|ZEROPAD)) == ZEROPAD)
1012 PAD(width - realsz, zeroes);
1013
1014 /* the string or number proper */
1015 #ifndef NO_FLOATING_POINT
1016 if ((flags & FPT) == 0) {
1017 #endif
1018 /* leading zeroes from decimal precision */
1019 PAD(dprec - size, zeroes);
1020 if (gs.grouping) {
1021 if (grouping_print(&gs, &io, cp, buf+BUF) < 0)
1022 goto error;
1023 } else {
1024 PRINT(cp, size);
1025 }
1026 #ifndef NO_FLOATING_POINT
1027 } else { /* glue together f_p fragments */
1028 if (!expchar) { /* %[fF] or sufficiently short %[gG] */
1029 if (expt <= 0) {
1030 PRINT(zeroes, 1);
1031 if (prec || flags & ALT)
1032 PRINT(&decimal_point, 1);
1033 PAD(-expt, zeroes);
1034 /* already handled initial 0's */
1035 prec += expt;
1036 } else {
1037 if (gs.grouping) {
1038 n = grouping_print(&gs, &io,
1039 cp, convbuf + ndig);
1040 if (n < 0)
1041 goto error;
1042 cp += n;
1043 } else {
1044 PRINTANDPAD(cp, convbuf + ndig,
1045 expt, zeroes);
1046 cp += expt;
1047 }
1048 if (prec || flags & ALT)
1049 PRINT(&decimal_point, 1);
1050 }
1051 PRINTANDPAD(cp, convbuf + ndig, prec, zeroes);
1052 } else { /* %[eE] or sufficiently long %[gG] */
1053 if (prec > 1 || flags & ALT) {
1054 buf[0] = *cp++;
1055 buf[1] = decimal_point;
1056 PRINT(buf, 2);
1057 PRINT(cp, ndig-1);
1058 PAD(prec - ndig, zeroes);
1059 } else /* XeYYY */
1060 PRINT(cp, 1);
1061 PRINT(expstr, expsize);
1062 }
1063 }
1064 #endif
1065 /* left-adjusting padding (always blank) */
1066 if (flags & LADJUST)
1067 PAD(width - realsz, blanks);
1068
1069 /* finally, adjust ret */
1070 ret += prsize;
1071
1072 FLUSH(); /* copy out the I/O vectors */
1073 }
1074 done:
1075 FLUSH();
1076 error:
1077 va_end(orgap);
1078 if (convbuf != NULL)
1079 free(convbuf);
1080 if (__sferror(fp))
1081 ret = EOF;
1082 if ((argtable != NULL) && (argtable != statargtable))
1083 free (argtable);
1084 return (ret);
1085 /* NOTREACHED */
1086 }
mirror of libc