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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 * 3. All advertising materials mentioning features or use of this software
17 * must display the following acknowledgement:
18 * This product includes software developed by the University of
19 * California, Berkeley and its contributors.
20 * 4. Neither the name of the University nor the names of its contributors
21 * may be used to endorse or promote products derived from this software
22 * without specific prior written permission.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * SUCH DAMAGE.
35 */
36
37 #include <sys/cdefs.h>
38 #if 0
39 #if defined(LIBC_SCCS) && !defined(lint)
40 static char sccsid[] = "@(#)vfprintf.c 8.1 (Berkeley) 6/4/93";
41 #endif /* LIBC_SCCS and not lint */
42 __FBSDID("FreeBSD: src/lib/libc/stdio/vfprintf.c,v 1.58 2003/04/14 11:24:53 das Exp");
43 #endif
44 __FBSDID("$FreeBSD: src/lib/libc/stdio/vfwprintf.c,v 1.14 2003/11/12 08:49:12 tjr Exp $");
45
46 /*
47 * Actual wprintf innards.
48 *
49 * Avoid making gratuitous changes to this source file; it should be kept
50 * as close as possible to vfprintf.c for ease of maintenance.
51 */
52
53 #include "namespace.h"
54 #include <sys/types.h>
55
56 #include <ctype.h>
57 #include <limits.h>
58 #include <locale.h>
59 #include <stdarg.h>
60 #include <stddef.h>
61 #include <stdint.h>
62 #include <stdio.h>
63 #include <stdlib.h>
64 #include <string.h>
65 #include <wchar.h>
66 #include <wctype.h>
67 #include "un-namespace.h"
68
69 #include "libc_private.h"
70 #include "local.h"
71 #include "fvwrite.h"
72
73 /* Define FLOATING_POINT to get floating point. */
74 #define FLOATING_POINT
75
76 union arg {
77 int intarg;
78 u_int uintarg;
79 long longarg;
80 u_long ulongarg;
81 long long longlongarg;
82 unsigned long long ulonglongarg;
83 ptrdiff_t ptrdiffarg;
84 size_t sizearg;
85 intmax_t intmaxarg;
86 uintmax_t uintmaxarg;
87 void *pvoidarg;
88 char *pchararg;
89 signed char *pschararg;
90 short *pshortarg;
91 int *pintarg;
92 long *plongarg;
93 long long *plonglongarg;
94 ptrdiff_t *pptrdiffarg;
95 size_t *psizearg;
96 intmax_t *pintmaxarg;
97 #ifdef FLOATING_POINT
98 double doublearg;
99 long double longdoublearg;
100 #endif
101 wint_t wintarg;
102 wchar_t *pwchararg;
103 };
104
105 /*
106 * Type ids for argument type table.
107 */
108 enum typeid {
109 T_UNUSED, TP_SHORT, T_INT, T_U_INT, TP_INT,
110 T_LONG, T_U_LONG, TP_LONG, T_LLONG, T_U_LLONG, TP_LLONG,
111 T_PTRDIFFT, TP_PTRDIFFT, T_SIZET, TP_SIZET,
112 T_INTMAXT, T_UINTMAXT, TP_INTMAXT, TP_VOID, TP_CHAR, TP_SCHAR,
113 T_DOUBLE, T_LONG_DOUBLE, T_WINT, TP_WCHAR
114 };
115
116 static int __sbprintf(FILE *, const wchar_t *, va_list);
117 static wint_t __xfputwc(wchar_t, FILE *);
118 static wchar_t *__ujtoa(uintmax_t, wchar_t *, int, int, const wchar_t *, int,
119 char, const char *);
120 static wchar_t *__ultoa(u_long, wchar_t *, int, int, const wchar_t *, int,
121 char, const char *);
122 static wchar_t *__mbsconv(char *, int);
123 static void __find_arguments(const wchar_t *, va_list, union arg **);
124 static void __grow_type_table(int, enum typeid **, int *);
125
126 /*
127 * Helper function for `fprintf to unbuffered unix file': creates a
128 * temporary buffer. We only work on write-only files; this avoids
129 * worries about ungetc buffers and so forth.
130 */
131 static int
132 __sbprintf(FILE *fp, const wchar_t *fmt, va_list ap)
133 {
134 int ret;
135 FILE fake;
136 unsigned char buf[BUFSIZ];
137
138 /* copy the important variables */
139 fake._flags = fp->_flags & ~__SNBF;
140 fake._file = fp->_file;
141 fake._cookie = fp->_cookie;
142 fake._write = fp->_write;
143 fake._extra = fp->_extra;
144
145 /* set up the buffer */
146 fake._bf._base = fake._p = buf;
147 fake._bf._size = fake._w = sizeof(buf);
148 fake._lbfsize = 0; /* not actually used, but Just In Case */
149
150 /* do the work, then copy any error status */
151 ret = __vfwprintf(&fake, fmt, ap);
152 if (ret >= 0 && __fflush(&fake))
153 ret = WEOF;
154 if (fake._flags & __SERR)
155 fp->_flags |= __SERR;
156 return (ret);
157 }
158
159 /*
160 * Like __fputwc, but handles fake string (__SSTR) files properly.
161 * File must already be locked.
162 */
163 static wint_t
164 __xfputwc(wchar_t wc, FILE *fp)
165 {
166 char buf[MB_LEN_MAX];
167 struct __suio uio;
168 struct __siov iov;
169 size_t i, len;
170 int ret;
171
172 if ((fp->_flags & __SSTR) == 0)
173 return (__fputwc(wc, fp));
174
175 if ((len = wcrtomb(buf, wc, NULL)) == (size_t)-1) {
176 fp->_flags |= __SERR;
177 return (WEOF);
178 }
179 uio.uio_iov = &iov;
180 uio.uio_resid = len;
181 uio.uio_iovcnt = 1;
182 iov.iov_base = buf;
183 iov.iov_len = len;
184 return (__sfvwrite(fp, &uio) != EOF ? (wint_t)wc : WEOF);
185 }
186
187 /*
188 * Macros for converting digits to letters and vice versa
189 */
190 #define to_digit(c) ((c) - '0')
191 #define is_digit(c) ((unsigned)to_digit(c) <= 9)
192 #define to_char(n) ((n) + '0')
193
194 /*
195 * Convert an unsigned long to ASCII for printf purposes, returning
196 * a pointer to the first character of the string representation.
197 * Octal numbers can be forced to have a leading zero; hex numbers
198 * use the given digits.
199 */
200 static wchar_t *
201 __ultoa(u_long val, wchar_t *endp, int base, int octzero, const wchar_t *xdigs,
202 int needgrp, char thousep, const char *grp)
203 {
204 wchar_t *cp = endp;
205 long sval;
206 int ndig;
207
208 /*
209 * Handle the three cases separately, in the hope of getting
210 * better/faster code.
211 */
212 switch (base) {
213 case 10:
214 if (val < 10) { /* many numbers are 1 digit */
215 *--cp = to_char(val);
216 return (cp);
217 }
218 ndig = 0;
219 /*
220 * On many machines, unsigned arithmetic is harder than
221 * signed arithmetic, so we do at most one unsigned mod and
222 * divide; this is sufficient to reduce the range of
223 * the incoming value to where signed arithmetic works.
224 */
225 if (val > LONG_MAX) {
226 *--cp = to_char(val % 10);
227 ndig++;
228 sval = val / 10;
229 } else
230 sval = val;
231 do {
232 *--cp = to_char(sval % 10);
233 ndig++;
234 /*
235 * If (*grp == CHAR_MAX) then no more grouping
236 * should be performed.
237 */
238 if (needgrp && ndig == *grp && *grp != CHAR_MAX
239 && sval > 9) {
240 *--cp = thousep;
241 ndig = 0;
242 /*
243 * If (*(grp+1) == '\0') then we have to
244 * use *grp character (last grouping rule)
245 * for all next cases
246 */
247 if (*(grp+1) != '\0')
248 grp++;
249 }
250 sval /= 10;
251 } while (sval != 0);
252 break;
253
254 case 8:
255 do {
256 *--cp = to_char(val & 7);
257 val >>= 3;
258 } while (val);
259 if (octzero && *cp != '0')
260 *--cp = '0';
261 break;
262
263 case 16:
264 do {
265 *--cp = xdigs[val & 15];
266 val >>= 4;
267 } while (val);
268 break;
269
270 default: /* oops */
271 abort();
272 }
273 return (cp);
274 }
275
276 /* Identical to __ultoa, but for intmax_t. */
277 static wchar_t *
278 __ujtoa(uintmax_t val, wchar_t *endp, int base, int octzero,
279 const wchar_t *xdigs, int needgrp, char thousep, const char *grp)
280 {
281 wchar_t *cp = endp;
282 intmax_t sval;
283 int ndig;
284
285 /* quick test for small values; __ultoa is typically much faster */
286 /* (perhaps instead we should run until small, then call __ultoa?) */
287 if (val <= ULONG_MAX)
288 return (__ultoa((u_long)val, endp, base, octzero, xdigs,
289 needgrp, thousep, grp));
290 switch (base) {
291 case 10:
292 if (val < 10) {
293 *--cp = to_char(val % 10);
294 return (cp);
295 }
296 ndig = 0;
297 if (val > INTMAX_MAX) {
298 *--cp = to_char(val % 10);
299 ndig++;
300 sval = val / 10;
301 } else
302 sval = val;
303 do {
304 *--cp = to_char(sval % 10);
305 ndig++;
306 /*
307 * If (*grp == CHAR_MAX) then no more grouping
308 * should be performed.
309 */
310 if (needgrp && *grp != CHAR_MAX && ndig == *grp
311 && sval > 9) {
312 *--cp = thousep;
313 ndig = 0;
314 /*
315 * If (*(grp+1) == '\0') then we have to
316 * use *grp character (last grouping rule)
317 * for all next cases
318 */
319 if (*(grp+1) != '\0')
320 grp++;
321 }
322 sval /= 10;
323 } while (sval != 0);
324 break;
325
326 case 8:
327 do {
328 *--cp = to_char(val & 7);
329 val >>= 3;
330 } while (val);
331 if (octzero && *cp != '0')
332 *--cp = '0';
333 break;
334
335 case 16:
336 do {
337 *--cp = xdigs[val & 15];
338 val >>= 4;
339 } while (val);
340 break;
341
342 default:
343 abort();
344 }
345 return (cp);
346 }
347
348 /*
349 * Convert a multibyte character string argument for the %s format to a wide
350 * string representation. ``prec'' specifies the maximum number of bytes
351 * to output. If ``prec'' is greater than or equal to zero, we can't assume
352 * that the multibyte char. string ends in a null character.
353 */
354 static wchar_t *
355 __mbsconv(char *mbsarg, int prec)
356 {
357 wchar_t *convbuf, *wcp;
358 const char *p;
359 size_t insize, nchars, nconv;
360
361 if (mbsarg == NULL)
362 return (NULL);
363
364 /*
365 * Supplied argument is a multibyte string; convert it to wide
366 * characters first.
367 */
368 if (prec >= 0) {
369 /*
370 * String is not guaranteed to be NUL-terminated. Find the
371 * number of characters to print.
372 */
373 p = mbsarg;
374 insize = nchars = 0;
375 while (nchars != (size_t)prec) {
376 nconv = mbrlen(p, MB_CUR_MAX, NULL);
377 if (nconv == 0 || nconv == (size_t)-1 ||
378 nconv == (size_t)-2)
379 break;
380 p += nconv;
381 nchars++;
382 insize += nconv;
383 }
384 if (nconv == (size_t)-1 || nconv == (size_t)-2)
385 return (NULL);
386 } else
387 insize = strlen(mbsarg);
388
389 /*
390 * Allocate buffer for the result and perform the conversion,
391 * converting at most `size' bytes of the input multibyte string to
392 * wide characters for printing.
393 */
394 convbuf = malloc((insize + 1) * sizeof(*convbuf));
395 if (convbuf == NULL)
396 return (NULL);
397 wcp = convbuf;
398 p = mbsarg;
399 while (insize != 0) {
400 nconv = mbrtowc(wcp, p, insize, NULL);
401 if (nconv == 0 || nconv == (size_t)-1 || nconv == (size_t)-2)
402 break;
403 wcp++;
404 p += nconv;
405 insize -= nconv;
406 }
407 if (nconv == (size_t)-1 || nconv == (size_t)-2) {
408 free(convbuf);
409 return (NULL);
410 }
411 *wcp = L'\0';
412
413 return (convbuf);
414 }
415
416 /*
417 * MT-safe version
418 */
419 int
420 vfwprintf(FILE * __restrict fp, const wchar_t * __restrict fmt0, va_list ap)
421
422 {
423 int ret;
424
425 FLOCKFILE(fp);
426 ret = __vfwprintf(fp, fmt0, ap);
427 FUNLOCKFILE(fp);
428 return (ret);
429 }
430
431 #ifdef FLOATING_POINT
432
433 #define dtoa __dtoa
434 #define freedtoa __freedtoa
435
436 #include <float.h>
437 #include <math.h>
438 #include "floatio.h"
439 #include "gdtoa.h"
440
441 #define DEFPREC 6
442
443 static int exponent(wchar_t *, int, wchar_t);
444
445 #endif /* FLOATING_POINT */
446
447 /*
448 * The size of the buffer we use as scratch space for integer
449 * conversions, among other things. Technically, we would need the
450 * most space for base 10 conversions with thousands' grouping
451 * characters between each pair of digits. 100 bytes is a
452 * conservative overestimate even for a 128-bit uintmax_t.
453 */
454 #define BUF 100
455
456 #define STATIC_ARG_TBL_SIZE 8 /* Size of static argument table. */
457
458 /*
459 * Flags used during conversion.
460 */
461 #define ALT 0x001 /* alternate form */
462 #define LADJUST 0x004 /* left adjustment */
463 #define LONGDBL 0x008 /* long double */
464 #define LONGINT 0x010 /* long integer */
465 #define LLONGINT 0x020 /* long long integer */
466 #define SHORTINT 0x040 /* short integer */
467 #define ZEROPAD 0x080 /* zero (as opposed to blank) pad */
468 #define FPT 0x100 /* Floating point number */
469 #define GROUPING 0x200 /* use grouping ("'" flag) */
470 /* C99 additional size modifiers: */
471 #define SIZET 0x400 /* size_t */
472 #define PTRDIFFT 0x800 /* ptrdiff_t */
473 #define INTMAXT 0x1000 /* intmax_t */
474 #define CHARINT 0x2000 /* print char using int format */
475
476 /*
477 * Non-MT-safe version
478 */
479 int
480 __vfwprintf(FILE *fp, const wchar_t *fmt0, va_list ap)
481 {
482 wchar_t *fmt; /* format string */
483 wchar_t ch; /* character from fmt */
484 int n, n2, n3; /* handy integer (short term usage) */
485 wchar_t *cp; /* handy char pointer (short term usage) */
486 int flags; /* flags as above */
487 int ret; /* return value accumulator */
488 int width; /* width from format (%8d), or 0 */
489 int prec; /* precision from format; <0 for N/A */
490 wchar_t sign; /* sign prefix (' ', '+', '-', or \0) */
491 char thousands_sep; /* locale specific thousands separator */
492 const char *grouping; /* locale specific numeric grouping rules */
493 #ifdef FLOATING_POINT
494 /*
495 * We can decompose the printed representation of floating
496 * point numbers into several parts, some of which may be empty:
497 *
498 * [+|-| ] [0x|0X] MMM . NNN [e|E|p|P] [+|-] ZZ
499 * A B ---C--- D E F
500 *
501 * A: 'sign' holds this value if present; '\0' otherwise
502 * B: ox[1] holds the 'x' or 'X'; '\0' if not hexadecimal
503 * C: cp points to the string MMMNNN. Leading and trailing
504 * zeros are not in the string and must be added.
505 * D: expchar holds this character; '\0' if no exponent, e.g. %f
506 * F: at least two digits for decimal, at least one digit for hex
507 */
508 char *decimal_point; /* locale specific decimal point */
509 int signflag; /* true if float is negative */
510 union { /* floating point arguments %[aAeEfFgG] */
511 double dbl;
512 long double ldbl;
513 } fparg;
514 int expt; /* integer value of exponent */
515 char expchar; /* exponent character: [eEpP\0] */
516 char *dtoaend; /* pointer to end of converted digits */
517 int expsize; /* character count for expstr */
518 int lead; /* sig figs before decimal or group sep */
519 int ndig; /* actual number of digits returned by dtoa */
520 wchar_t expstr[MAXEXPDIG+2]; /* buffer for exponent string: e+ZZZ */
521 char *dtoaresult; /* buffer allocated by dtoa */
522 int nseps; /* number of group separators with ' */
523 int nrepeats; /* number of repeats of the last group */
524 #endif
525 u_long ulval; /* integer arguments %[diouxX] */
526 uintmax_t ujval; /* %j, %ll, %q, %t, %z integers */
527 int base; /* base for [diouxX] conversion */
528 int dprec; /* a copy of prec if [diouxX], 0 otherwise */
529 int realsz; /* field size expanded by dprec, sign, etc */
530 int size; /* size of converted field or string */
531 int prsize; /* max size of printed field */
532 const wchar_t *xdigs; /* digits for [xX] conversion */
533 wchar_t buf[BUF]; /* buffer with space for digits of uintmax_t */
534 wchar_t ox[2]; /* space for 0x hex-prefix */
535 union arg *argtable; /* args, built due to positional arg */
536 union arg statargtable [STATIC_ARG_TBL_SIZE];
537 int nextarg; /* 1-based argument index */
538 va_list orgap; /* original argument pointer */
539 wchar_t *convbuf; /* multibyte to wide conversion result */
540
541 /*
542 * Choose PADSIZE to trade efficiency vs. size. If larger printf
543 * fields occur frequently, increase PADSIZE and make the initialisers
544 * below longer.
545 */
546 #define PADSIZE 16 /* pad chunk size */
547 static wchar_t blanks[PADSIZE] =
548 {' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' '};
549 static wchar_t zeroes[PADSIZE] =
550 {'0','0','0','0','0','0','0','0','0','0','0','0','0','0','0','0'};
551
552 static const wchar_t xdigs_lower[16] = L"0123456789abcdef";
553 static const wchar_t xdigs_upper[16] = L"0123456789ABCDEF";
554
555 /*
556 * BEWARE, these `goto error' on error, PRINT uses `n2' and
557 * PAD uses `n'.
558 */
559 #define PRINT(ptr, len) do { \
560 for (n3 = 0; n3 < (len); n3++) \
561 __xfputwc((ptr)[n3], fp); \
562 } while (0)
563 #define PAD(howmany, with) do { \
564 if ((n = (howmany)) > 0) { \
565 while (n > PADSIZE) { \
566 PRINT(with, PADSIZE); \
567 n -= PADSIZE; \
568 } \
569 PRINT(with, n); \
570 } \
571 } while (0)
572 #define PRINTANDPAD(p, ep, len, with) do { \
573 n2 = (ep) - (p); \
574 if (n2 > (len)) \
575 n2 = (len); \
576 if (n2 > 0) \
577 PRINT((p), n2); \
578 PAD((len) - (n2 > 0 ? n2 : 0), (with)); \
579 } while(0)
580
581 /*
582 * Get the argument indexed by nextarg. If the argument table is
583 * built, use it to get the argument. If its not, get the next
584 * argument (and arguments must be gotten sequentially).
585 */
586 #define GETARG(type) \
587 ((argtable != NULL) ? *((type*)(&argtable[nextarg++])) : \
588 (nextarg++, va_arg(ap, type)))
589
590 /*
591 * To extend shorts properly, we need both signed and unsigned
592 * argument extraction methods.
593 */
594 #define SARG() \
595 (flags&LONGINT ? GETARG(long) : \
596 flags&SHORTINT ? (long)(short)GETARG(int) : \
597 flags&CHARINT ? (long)(signed char)GETARG(int) : \
598 (long)GETARG(int))
599 #define UARG() \
600 (flags&LONGINT ? GETARG(u_long) : \
601 flags&SHORTINT ? (u_long)(u_short)GETARG(int) : \
602 flags&CHARINT ? (u_long)(u_char)GETARG(int) : \
603 (u_long)GETARG(u_int))
604 #define INTMAX_SIZE (INTMAXT|SIZET|PTRDIFFT|LLONGINT)
605 #define SJARG() \
606 (flags&INTMAXT ? GETARG(intmax_t) : \
607 flags&SIZET ? (intmax_t)GETARG(size_t) : \
608 flags&PTRDIFFT ? (intmax_t)GETARG(ptrdiff_t) : \
609 (intmax_t)GETARG(long long))
610 #define UJARG() \
611 (flags&INTMAXT ? GETARG(uintmax_t) : \
612 flags&SIZET ? (uintmax_t)GETARG(size_t) : \
613 flags&PTRDIFFT ? (uintmax_t)GETARG(ptrdiff_t) : \
614 (uintmax_t)GETARG(unsigned long long))
615
616 /*
617 * Get * arguments, including the form *nn$. Preserve the nextarg
618 * that the argument can be gotten once the type is determined.
619 */
620 #define GETASTER(val) \
621 n2 = 0; \
622 cp = fmt; \
623 while (is_digit(*cp)) { \
624 n2 = 10 * n2 + to_digit(*cp); \
625 cp++; \
626 } \
627 if (*cp == '$') { \
628 int hold = nextarg; \
629 if (argtable == NULL) { \
630 argtable = statargtable; \
631 __find_arguments (fmt0, orgap, &argtable); \
632 } \
633 nextarg = n2; \
634 val = GETARG (int); \
635 nextarg = hold; \
636 fmt = ++cp; \
637 } else { \
638 val = GETARG (int); \
639 }
640
641
642 thousands_sep = '\0';
643 grouping = NULL;
644 #ifdef FLOATING_POINT
645 decimal_point = localeconv()->decimal_point;
646 #endif
647 convbuf = NULL;
648 /* sorry, fwprintf(read_only_file, L"") returns WEOF, not 0 */
649 if (cantwrite(fp))
650 return (EOF);
651
652 /* optimise fprintf(stderr) (and other unbuffered Unix files) */
653 if ((fp->_flags & (__SNBF|__SWR|__SRW)) == (__SNBF|__SWR) &&
654 fp->_file >= 0)
655 return (__sbprintf(fp, fmt0, ap));
656
657 fmt = (wchar_t *)fmt0;
658 argtable = NULL;
659 nextarg = 1;
660 va_copy(orgap, ap);
661 ret = 0;
662
663 /*
664 * Scan the format for conversions (`%' character).
665 */
666 for (;;) {
667 for (cp = fmt; (ch = *fmt) != '\0' && ch != '%'; fmt++)
668 /* void */;
669 if ((n = fmt - cp) != 0) {
670 if ((unsigned)ret + n > INT_MAX) {
671 ret = EOF;
672 goto error;
673 }
674 PRINT(cp, n);
675 ret += n;
676 }
677 if (ch == '\0')
678 goto done;
679 fmt++; /* skip over '%' */
680
681 flags = 0;
682 dprec = 0;
683 width = 0;
684 prec = -1;
685 sign = '\0';
686 ox[1] = '\0';
687
688 rflag: ch = *fmt++;
689 reswitch: switch (ch) {
690 case ' ':
691 /*-
692 * ``If the space and + flags both appear, the space
693 * flag will be ignored.''
694 * -- ANSI X3J11
695 */
696 if (!sign)
697 sign = ' ';
698 goto rflag;
699 case '#':
700 flags |= ALT;
701 goto rflag;
702 case '*':
703 /*-
704 * ``A negative field width argument is taken as a
705 * - flag followed by a positive field width.''
706 * -- ANSI X3J11
707 * They don't exclude field widths read from args.
708 */
709 GETASTER (width);
710 if (width >= 0)
711 goto rflag;
712 width = -width;
713 /* FALLTHROUGH */
714 case '-':
715 flags |= LADJUST;
716 goto rflag;
717 case '+':
718 sign = '+';
719 goto rflag;
720 case '\'':
721 flags |= GROUPING;
722 thousands_sep = *(localeconv()->thousands_sep);
723 grouping = localeconv()->grouping;
724 goto rflag;
725 case '.':
726 if ((ch = *fmt++) == '*') {
727 GETASTER (prec);
728 goto rflag;
729 }
730 prec = 0;
731 while (is_digit(ch)) {
732 prec = 10 * prec + to_digit(ch);
733 ch = *fmt++;
734 }
735 goto reswitch;
736 case '0':
737 /*-
738 * ``Note that 0 is taken as a flag, not as the
739 * beginning of a field width.''
740 * -- ANSI X3J11
741 */
742 flags |= ZEROPAD;
743 goto rflag;
744 case '1': case '2': case '3': case '4':
745 case '5': case '6': case '7': case '8': case '9':
746 n = 0;
747 do {
748 n = 10 * n + to_digit(ch);
749 ch = *fmt++;
750 } while (is_digit(ch));
751 if (ch == '$') {
752 nextarg = n;
753 if (argtable == NULL) {
754 argtable = statargtable;
755 __find_arguments (fmt0, orgap,
756 &argtable);
757 }
758 goto rflag;
759 }
760 width = n;
761 goto reswitch;
762 #ifdef FLOATING_POINT
763 case 'L':
764 flags |= LONGDBL;
765 goto rflag;
766 #endif
767 case 'h':
768 if (flags & SHORTINT) {
769 flags &= ~SHORTINT;
770 flags |= CHARINT;
771 } else
772 flags |= SHORTINT;
773 goto rflag;
774 case 'j':
775 flags |= INTMAXT;
776 goto rflag;
777 case 'l':
778 if (flags & LONGINT) {
779 flags &= ~LONGINT;
780 flags |= LLONGINT;
781 } else
782 flags |= LONGINT;
783 goto rflag;
784 case 'q':
785 flags |= LLONGINT; /* not necessarily */
786 goto rflag;
787 case 't':
788 flags |= PTRDIFFT;
789 goto rflag;
790 case 'z':
791 flags |= SIZET;
792 goto rflag;
793 case 'C':
794 flags |= LONGINT;
795 /*FALLTHROUGH*/
796 case 'c':
797 if (flags & LONGINT)
798 *(cp = buf) = (wchar_t)GETARG(wint_t);
799 else
800 *(cp = buf) = (wchar_t)btowc(GETARG(int));
801 size = 1;
802 sign = '\0';
803 break;
804 case 'D':
805 flags |= LONGINT;
806 /*FALLTHROUGH*/
807 case 'd':
808 case 'i':
809 if (flags & INTMAX_SIZE) {
810 ujval = SJARG();
811 if ((intmax_t)ujval < 0) {
812 ujval = -ujval;
813 sign = '-';
814 }
815 } else {
816 ulval = SARG();
817 if ((long)ulval < 0) {
818 ulval = -ulval;
819 sign = '-';
820 }
821 }
822 base = 10;
823 goto number;
824 #ifdef FLOATING_POINT
825 #ifdef HEXFLOAT
826 case 'a':
827 case 'A':
828 if (ch == 'a') {
829 ox[1] = 'x';
830 xdigs = xdigs_lower;
831 expchar = 'p';
832 } else {
833 ox[1] = 'X';
834 xdigs = xdigs_upper;
835 expchar = 'P';
836 }
837 /*
838 * XXX We don't actually have a conversion
839 * XXX routine for this yet.
840 */
841 if (flags & LONGDBL) {
842 fparg.ldbl = (double)GETARG(long double);
843 dtoaresult =
844 __hldtoa(fparg.ldbl, xdigs, prec,
845 &expt, &signflag, &dtoaend);
846 } else {
847 fparg.dbl = GETARG(double);
848 dtoaresult =
849 __hdtoa(fparg.dbl, xdigs, prec,
850 &expt, &signflag, &dtoaend);
851 }
852 if (convbuf != NULL)
853 free(convbuf);
854 cp = convbuf = __mbsconv(dtoaresult, -1);
855 freedtoa(dtoaresult);
856 goto fp_begin;
857 #endif
858 case 'e':
859 case 'E':
860 expchar = ch;
861 if (prec < 0) /* account for digit before decpt */
862 prec = DEFPREC + 1;
863 else
864 prec++;
865 goto fp_begin;
866 case 'f':
867 case 'F':
868 expchar = '\0';
869 goto fp_begin;
870 case 'g':
871 case 'G':
872 expchar = ch - ('g' - 'e');
873 if (prec == 0)
874 prec = 1;
875 fp_begin:
876 if (prec < 0)
877 prec = DEFPREC;
878 if (convbuf != NULL)
879 free(convbuf);
880 if (flags & LONGDBL) {
881 fparg.ldbl = GETARG(long double);
882 dtoaresult =
883 __ldtoa(&fparg.ldbl, expchar ? 2 : 3, prec,
884 &expt, &signflag, &dtoaend);
885 } else {
886 fparg.dbl = GETARG(double);
887 dtoaresult =
888 dtoa(fparg.dbl, expchar ? 2 : 3, prec,
889 &expt, &signflag, &dtoaend);
890 if (expt == 9999)
891 expt = INT_MAX;
892 }
893 ndig = dtoaend - dtoaresult;
894 cp = convbuf = __mbsconv(dtoaresult, -1);
895 freedtoa(dtoaresult);
896 if (signflag)
897 sign = '-';
898 if (expt == INT_MAX) { /* inf or nan */
899 if (*cp == 'N') {
900 cp = (ch >= 'a') ? L"nan" : L"NAN";
901 sign = '\0';
902 } else
903 cp = (ch >= 'a') ? L"inf" : L"INF";
904 size = 3;
905 break;
906 }
907 flags |= FPT;
908 if (ch == 'g' || ch == 'G') {
909 if (expt > -4 && expt <= prec) {
910 /* Make %[gG] smell like %[fF] */
911 expchar = '\0';
912 if (flags & ALT)
913 prec -= expt;
914 else
915 prec = ndig - expt;
916 if (prec < 0)
917 prec = 0;
918 } else {
919 /*
920 * Make %[gG] smell like %[eE], but
921 * trim trailing zeroes if no # flag.
922 */
923 if (!(flags & ALT))
924 prec = ndig;
925 }
926 }
927 if (expchar) {
928 expsize = exponent(expstr, expt - 1, expchar);
929 size = expsize + prec;
930 if (prec > 1 || flags & ALT)
931 ++size;
932 } else {
933 /* space for digits before decimal point */
934 if (expt > 0)
935 size = expt;
936 else /* "0" */
937 size = 1;
938 /* space for decimal pt and following digits */
939 if (prec || flags & ALT)
940 size += prec + 1;
941 if (grouping && expt > 0) {
942 /* space for thousands' grouping */
943 nseps = nrepeats = 0;
944 lead = expt;
945 while (*grouping != CHAR_MAX) {
946 if (lead <= *grouping)
947 break;
948 lead -= *grouping;
949 if (*(grouping+1)) {
950 nseps++;
951 grouping++;
952 } else
953 nrepeats++;
954 }
955 size += nseps + nrepeats;
956 } else
957 lead = expt;
958 }
959 break;
960 #endif /* FLOATING_POINT */
961 case 'n':
962 /*
963 * Assignment-like behavior is specified if the
964 * value overflows or is otherwise unrepresentable.
965 * C99 says to use `signed char' for %hhn conversions.
966 */
967 if (flags & LLONGINT)
968 *GETARG(long long *) = ret;
969 else if (flags & SIZET)
970 *GETARG(ssize_t *) = (ssize_t)ret;
971 else if (flags & PTRDIFFT)
972 *GETARG(ptrdiff_t *) = ret;
973 else if (flags & INTMAXT)
974 *GETARG(intmax_t *) = ret;
975 else if (flags & LONGINT)
976 *GETARG(long *) = ret;
977 else if (flags & SHORTINT)
978 *GETARG(short *) = ret;
979 else if (flags & CHARINT)
980 *GETARG(signed char *) = ret;
981 else
982 *GETARG(int *) = ret;
983 continue; /* no output */
984 case 'O':
985 flags |= LONGINT;
986 /*FALLTHROUGH*/
987 case 'o':
988 if (flags & INTMAX_SIZE)
989 ujval = UJARG();
990 else
991 ulval = UARG();
992 base = 8;
993 goto nosign;
994 case 'p':
995 /*-
996 * ``The argument shall be a pointer to void. The
997 * value of the pointer is converted to a sequence
998 * of printable characters, in an implementation-
999 * defined manner.''
1000 * -- ANSI X3J11
1001 */
1002 ujval = (uintmax_t)(uintptr_t)GETARG(void *);
1003 base = 16;
1004 xdigs = xdigs_lower;
1005 flags = flags | INTMAXT;
1006 ox[1] = 'x';
1007 goto nosign;
1008 case 'S':
1009 flags |= LONGINT;
1010 /*FALLTHROUGH*/
1011 case 's':
1012 if (flags & LONGINT) {
1013 if ((cp = GETARG(wchar_t *)) == NULL)
1014 cp = L"(null)";
1015 } else {
1016 char *mbp;
1017
1018 if (convbuf != NULL)
1019 free(convbuf);
1020 if ((mbp = GETARG(char *)) == NULL)
1021 cp = L"(null)";
1022 else {
1023 convbuf = __mbsconv(mbp, prec);
1024 if (convbuf == NULL) {
1025 fp->_flags |= __SERR;
1026 goto error;
1027 }
1028 cp = convbuf;
1029 }
1030 }
1031
1032 if (prec >= 0) {
1033 /*
1034 * can't use wcslen; can only look for the
1035 * NUL in the first `prec' characters, and
1036 * wcslen() will go further.
1037 */
1038 wchar_t *p = wmemchr(cp, 0, (size_t)prec);
1039
1040 if (p != NULL) {
1041 size = p - cp;
1042 if (size > prec)
1043 size = prec;
1044 } else
1045 size = prec;
1046 } else
1047 size = wcslen(cp);
1048 sign = '\0';
1049 break;
1050 case 'U':
1051 flags |= LONGINT;
1052 /*FALLTHROUGH*/
1053 case 'u':
1054 if (flags & INTMAX_SIZE)
1055 ujval = UJARG();
1056 else
1057 ulval = UARG();
1058 base = 10;
1059 goto nosign;
1060 case 'X':
1061 xdigs = xdigs_upper;
1062 goto hex;
1063 case 'x':
1064 xdigs = xdigs_lower;
1065 hex:
1066 if (flags & INTMAX_SIZE)
1067 ujval = UJARG();
1068 else
1069 ulval = UARG();
1070 base = 16;
1071 /* leading 0x/X only if non-zero */
1072 if (flags & ALT &&
1073 (flags & INTMAX_SIZE ? ujval != 0 : ulval != 0))
1074 ox[1] = ch;
1075
1076 flags &= ~GROUPING;
1077 /* unsigned conversions */
1078 nosign: sign = '\0';
1079 /*-
1080 * ``... diouXx conversions ... if a precision is
1081 * specified, the 0 flag will be ignored.''
1082 * -- ANSI X3J11
1083 */
1084 number: if ((dprec = prec) >= 0)
1085 flags &= ~ZEROPAD;
1086
1087 /*-
1088 * ``The result of converting a zero value with an
1089 * explicit precision of zero is no characters.''
1090 * -- ANSI X3J11
1091 */
1092 cp = buf + BUF;
1093 if (flags & INTMAX_SIZE) {
1094 if (ujval != 0 || prec != 0)
1095 cp = __ujtoa(ujval, cp, base,
1096 flags & ALT, xdigs,
1097 flags & GROUPING, thousands_sep,
1098 grouping);
1099 } else {
1100 if (ulval != 0 || prec != 0)
1101 cp = __ultoa(ulval, cp, base,
1102 flags & ALT, xdigs,
1103 flags & GROUPING, thousands_sep,
1104 grouping);
1105 }
1106 size = buf + BUF - cp;
1107 if (size > BUF) /* should never happen */
1108 abort();
1109 break;
1110 default: /* "%?" prints ?, unless ? is NUL */
1111 if (ch == '\0')
1112 goto done;
1113 /* pretend it was %c with argument ch */
1114 cp = buf;
1115 *cp = ch;
1116 size = 1;
1117 sign = '\0';
1118 break;
1119 }
1120
1121 /*
1122 * All reasonable formats wind up here. At this point, `cp'
1123 * points to a string which (if not flags&LADJUST) should be
1124 * padded out to `width' places. If flags&ZEROPAD, it should
1125 * first be prefixed by any sign or other prefix; otherwise,
1126 * it should be blank padded before the prefix is emitted.
1127 * After any left-hand padding and prefixing, emit zeroes
1128 * required by a decimal [diouxX] precision, then print the
1129 * string proper, then emit zeroes required by any leftover
1130 * floating precision; finally, if LADJUST, pad with blanks.
1131 *
1132 * Compute actual size, so we know how much to pad.
1133 * size excludes decimal prec; realsz includes it.
1134 */
1135 realsz = dprec > size ? dprec : size;
1136 if (sign)
1137 realsz++;
1138 else if (ox[1])
1139 realsz += 2;
1140
1141 prsize = width > realsz ? width : realsz;
1142 if ((unsigned)ret + prsize > INT_MAX) {
1143 ret = EOF;
1144 goto error;
1145 }
1146
1147 /* right-adjusting blank padding */
1148 if ((flags & (LADJUST|ZEROPAD)) == 0)
1149 PAD(width - realsz, blanks);
1150
1151 /* prefix */
1152 if (sign) {
1153 PRINT(&sign, 1);
1154 } else if (ox[1]) { /* ox[1] is either x, X, or \0 */
1155 ox[0] = '0';
1156 PRINT(ox, 2);
1157 }
1158
1159 /* right-adjusting zero padding */
1160 if ((flags & (LADJUST|ZEROPAD)) == ZEROPAD)
1161 PAD(width - realsz, zeroes);
1162
1163 /* leading zeroes from decimal precision */
1164 PAD(dprec - size, zeroes);
1165
1166 /* the string or number proper */
1167 #ifdef FLOATING_POINT
1168 if ((flags & FPT) == 0) {
1169 PRINT(cp, size);
1170 } else { /* glue together f_p fragments */
1171 if (!expchar) { /* %[fF] or sufficiently short %[gG] */
1172 if (expt <= 0) {
1173 PRINT(zeroes, 1);
1174 if (prec || flags & ALT)
1175 PRINT(decimal_point, 1);
1176 PAD(-expt, zeroes);
1177 /* already handled initial 0's */
1178 prec += expt;
1179 } else {
1180 PRINTANDPAD(cp, convbuf + ndig, lead, zeroes);
1181 cp += lead;
1182 if (grouping) {
1183 while (nseps>0 || nrepeats>0) {
1184 if (nrepeats > 0)
1185 nrepeats--;
1186 else {
1187 grouping--;
1188 nseps--;
1189 }
1190 PRINT(&thousands_sep,
1191 1);
1192 PRINTANDPAD(cp,
1193 convbuf + ndig,
1194 *grouping, zeroes);
1195 cp += *grouping;
1196 }
1197 if (cp > convbuf + ndig)
1198 cp = convbuf + ndig;
1199 }
1200 if (prec || flags & ALT) {
1201 buf[0] = *decimal_point;
1202 PRINT(buf, 1);
1203 }
1204 }
1205 PRINTANDPAD(cp, convbuf + ndig, prec, zeroes);
1206 } else { /* %[eE] or sufficiently long %[gG] */
1207 if (prec > 1 || flags & ALT) {
1208 buf[0] = *cp++;
1209 buf[1] = *decimal_point;
1210 PRINT(buf, 2);
1211 PRINT(cp, ndig-1);
1212 PAD(prec - ndig, zeroes);
1213 } else /* XeYYY */
1214 PRINT(cp, 1);
1215 PRINT(expstr, expsize);
1216 }
1217 }
1218 #else
1219 PRINT(cp, size);
1220 #endif
1221 /* left-adjusting padding (always blank) */
1222 if (flags & LADJUST)
1223 PAD(width - realsz, blanks);
1224
1225 /* finally, adjust ret */
1226 ret += prsize;
1227 }
1228 done:
1229 error:
1230 if (convbuf != NULL)
1231 free(convbuf);
1232 if (__sferror(fp))
1233 ret = EOF;
1234 if ((argtable != NULL) && (argtable != statargtable))
1235 free (argtable);
1236 return (ret);
1237 /* NOTREACHED */
1238 }
1239
1240 /*
1241 * Find all arguments when a positional parameter is encountered. Returns a
1242 * table, indexed by argument number, of pointers to each arguments. The
1243 * initial argument table should be an array of STATIC_ARG_TBL_SIZE entries.
1244 * It will be replaces with a malloc-ed one if it overflows.
1245 */
1246 static void
1247 __find_arguments (const wchar_t *fmt0, va_list ap, union arg **argtable)
1248 {
1249 wchar_t *fmt; /* format string */
1250 wchar_t ch; /* character from fmt */
1251 int n, n2; /* handy integer (short term usage) */
1252 wchar_t *cp; /* handy char pointer (short term usage) */
1253 int flags; /* flags as above */
1254 int width; /* width from format (%8d), or 0 */
1255 enum typeid *typetable; /* table of types */
1256 enum typeid stattypetable [STATIC_ARG_TBL_SIZE];
1257 int tablesize; /* current size of type table */
1258 int tablemax; /* largest used index in table */
1259 int nextarg; /* 1-based argument index */
1260
1261 /*
1262 * Add an argument type to the table, expanding if necessary.
1263 */
1264 #define ADDTYPE(type) \
1265 ((nextarg >= tablesize) ? \
1266 __grow_type_table(nextarg, &typetable, &tablesize) : 0, \
1267 (nextarg > tablemax) ? tablemax = nextarg : 0, \
1268 typetable[nextarg++] = type)
1269
1270 #define ADDSARG() \
1271 ((flags&INTMAXT) ? ADDTYPE(T_INTMAXT) : \
1272 ((flags&SIZET) ? ADDTYPE(T_SIZET) : \
1273 ((flags&PTRDIFFT) ? ADDTYPE(T_PTRDIFFT) : \
1274 ((flags&LLONGINT) ? ADDTYPE(T_LLONG) : \
1275 ((flags&LONGINT) ? ADDTYPE(T_LONG) : ADDTYPE(T_INT))))))
1276
1277 #define ADDUARG() \
1278 ((flags&INTMAXT) ? ADDTYPE(T_UINTMAXT) : \
1279 ((flags&SIZET) ? ADDTYPE(T_SIZET) : \
1280 ((flags&PTRDIFFT) ? ADDTYPE(T_PTRDIFFT) : \
1281 ((flags&LLONGINT) ? ADDTYPE(T_U_LLONG) : \
1282 ((flags&LONGINT) ? ADDTYPE(T_U_LONG) : ADDTYPE(T_U_INT))))))
1283
1284 /*
1285 * Add * arguments to the type array.
1286 */
1287 #define ADDASTER() \
1288 n2 = 0; \
1289 cp = fmt; \
1290 while (is_digit(*cp)) { \
1291 n2 = 10 * n2 + to_digit(*cp); \
1292 cp++; \
1293 } \
1294 if (*cp == '$') { \
1295 int hold = nextarg; \
1296 nextarg = n2; \
1297 ADDTYPE (T_INT); \
1298 nextarg = hold; \
1299 fmt = ++cp; \
1300 } else { \
1301 ADDTYPE (T_INT); \
1302 }
1303 fmt = (wchar_t *)fmt0;
1304 typetable = stattypetable;
1305 tablesize = STATIC_ARG_TBL_SIZE;
1306 tablemax = 0;
1307 nextarg = 1;
1308 memset (typetable, T_UNUSED, STATIC_ARG_TBL_SIZE);
1309
1310 /*
1311 * Scan the format for conversions (`%' character).
1312 */
1313 for (;;) {
1314 for (cp = fmt; (ch = *fmt) != '\0' && ch != '%'; fmt++)
1315 /* void */;
1316 if (ch == '\0')
1317 goto done;
1318 fmt++; /* skip over '%' */
1319
1320 flags = 0;
1321 width = 0;
1322
1323 rflag: ch = *fmt++;
1324 reswitch: switch (ch) {
1325 case ' ':
1326 case '#':
1327 goto rflag;
1328 case '*':
1329 ADDASTER ();
1330 goto rflag;
1331 case '-':
1332 case '+':
1333 case '\'':
1334 goto rflag;
1335 case '.':
1336 if ((ch = *fmt++) == '*') {
1337 ADDASTER ();
1338 goto rflag;
1339 }
1340 while (is_digit(ch)) {
1341 ch = *fmt++;
1342 }
1343 goto reswitch;
1344 case '0':
1345 goto rflag;
1346 case '1': case '2': case '3': case '4':
1347 case '5': case '6': case '7': case '8': case '9':
1348 n = 0;
1349 do {
1350 n = 10 * n + to_digit(ch);
1351 ch = *fmt++;
1352 } while (is_digit(ch));
1353 if (ch == '$') {
1354 nextarg = n;
1355 goto rflag;
1356 }
1357 width = n;
1358 goto reswitch;
1359 #ifdef FLOATING_POINT
1360 case 'L':
1361 flags |= LONGDBL;
1362 goto rflag;
1363 #endif
1364 case 'h':
1365 if (flags & SHORTINT) {
1366 flags &= ~SHORTINT;
1367 flags |= CHARINT;
1368 } else
1369 flags |= SHORTINT;
1370 goto rflag;
1371 case 'j':
1372 flags |= INTMAXT;
1373 goto rflag;
1374 case 'l':
1375 if (flags & LONGINT) {
1376 flags &= ~LONGINT;
1377 flags |= LLONGINT;
1378 } else
1379 flags |= LONGINT;
1380 goto rflag;
1381 case 'q':
1382 flags |= LLONGINT; /* not necessarily */
1383 goto rflag;
1384 case 't':
1385 flags |= PTRDIFFT;
1386 goto rflag;
1387 case 'z':
1388 flags |= SIZET;
1389 goto rflag;
1390 case 'C':
1391 flags |= LONGINT;
1392 /*FALLTHROUGH*/
1393 case 'c':
1394 if (flags & LONGINT)
1395 ADDTYPE(T_WINT);
1396 else
1397 ADDTYPE(T_INT);
1398 break;
1399 case 'D':
1400 flags |= LONGINT;
1401 /*FALLTHROUGH*/
1402 case 'd':
1403 case 'i':
1404 ADDSARG();
1405 break;
1406 #ifdef FLOATING_POINT
1407 #ifdef HEXFLOAT
1408 case 'a':
1409 case 'A':
1410 #endif
1411 case 'e':
1412 case 'E':
1413 case 'f':
1414 case 'g':
1415 case 'G':
1416 if (flags & LONGDBL)
1417 ADDTYPE(T_LONG_DOUBLE);
1418 else
1419 ADDTYPE(T_DOUBLE);
1420 break;
1421 #endif /* FLOATING_POINT */
1422 case 'n':
1423 if (flags & INTMAXT)
1424 ADDTYPE(TP_INTMAXT);
1425 else if (flags & PTRDIFFT)
1426 ADDTYPE(TP_PTRDIFFT);
1427 else if (flags & SIZET)
1428 ADDTYPE(TP_SIZET);
1429 else if (flags & LLONGINT)
1430 ADDTYPE(TP_LLONG);
1431 else if (flags & LONGINT)
1432 ADDTYPE(TP_LONG);
1433 else if (flags & SHORTINT)
1434 ADDTYPE(TP_SHORT);
1435 else if (flags & CHARINT)
1436 ADDTYPE(TP_SCHAR);
1437 else
1438 ADDTYPE(TP_INT);
1439 continue; /* no output */
1440 case 'O':
1441 flags |= LONGINT;
1442 /*FALLTHROUGH*/
1443 case 'o':
1444 ADDUARG();
1445 break;
1446 case 'p':
1447 ADDTYPE(TP_VOID);
1448 break;
1449 case 'S':
1450 flags |= LONGINT;
1451 /*FALLTHROUGH*/
1452 case 's':
1453 if (flags & LONGINT)
1454 ADDTYPE(TP_WCHAR);
1455 else
1456 ADDTYPE(TP_CHAR);
1457 break;
1458 case 'U':
1459 flags |= LONGINT;
1460 /*FALLTHROUGH*/
1461 case 'u':
1462 case 'X':
1463 case 'x':
1464 ADDUARG();
1465 break;
1466 default: /* "%?" prints ?, unless ? is NUL */
1467 if (ch == '\0')
1468 goto done;
1469 break;
1470 }
1471 }
1472 done:
1473 /*
1474 * Build the argument table.
1475 */
1476 if (tablemax >= STATIC_ARG_TBL_SIZE) {
1477 *argtable = (union arg *)
1478 malloc (sizeof (union arg) * (tablemax + 1));
1479 }
1480
1481 (*argtable) [0].intarg = 0;
1482 for (n = 1; n <= tablemax; n++) {
1483 switch (typetable [n]) {
1484 case T_UNUSED: /* whoops! */
1485 (*argtable) [n].intarg = va_arg (ap, int);
1486 break;
1487 case TP_SCHAR:
1488 (*argtable) [n].pschararg = va_arg (ap, signed char *);
1489 break;
1490 case TP_SHORT:
1491 (*argtable) [n].pshortarg = va_arg (ap, short *);
1492 break;
1493 case T_INT:
1494 (*argtable) [n].intarg = va_arg (ap, int);
1495 break;
1496 case T_U_INT:
1497 (*argtable) [n].uintarg = va_arg (ap, unsigned int);
1498 break;
1499 case TP_INT:
1500 (*argtable) [n].pintarg = va_arg (ap, int *);
1501 break;
1502 case T_LONG:
1503 (*argtable) [n].longarg = va_arg (ap, long);
1504 break;
1505 case T_U_LONG:
1506 (*argtable) [n].ulongarg = va_arg (ap, unsigned long);
1507 break;
1508 case TP_LONG:
1509 (*argtable) [n].plongarg = va_arg (ap, long *);
1510 break;
1511 case T_LLONG:
1512 (*argtable) [n].longlongarg = va_arg (ap, long long);
1513 break;
1514 case T_U_LLONG:
1515 (*argtable) [n].ulonglongarg = va_arg (ap, unsigned long long);
1516 break;
1517 case TP_LLONG:
1518 (*argtable) [n].plonglongarg = va_arg (ap, long long *);
1519 break;
1520 case T_PTRDIFFT:
1521 (*argtable) [n].ptrdiffarg = va_arg (ap, ptrdiff_t);
1522 break;
1523 case TP_PTRDIFFT:
1524 (*argtable) [n].pptrdiffarg = va_arg (ap, ptrdiff_t *);
1525 break;
1526 case T_SIZET:
1527 (*argtable) [n].sizearg = va_arg (ap, size_t);
1528 break;
1529 case TP_SIZET:
1530 (*argtable) [n].psizearg = va_arg (ap, ssize_t *);
1531 break;
1532 case T_INTMAXT:
1533 (*argtable) [n].intmaxarg = va_arg (ap, intmax_t);
1534 break;
1535 case T_UINTMAXT:
1536 (*argtable) [n].uintmaxarg = va_arg (ap, uintmax_t);
1537 break;
1538 case TP_INTMAXT:
1539 (*argtable) [n].pintmaxarg = va_arg (ap, intmax_t *);
1540 break;
1541 #ifdef FLOATING_POINT
1542 case T_DOUBLE:
1543 (*argtable) [n].doublearg = va_arg (ap, double);
1544 break;
1545 case T_LONG_DOUBLE:
1546 (*argtable) [n].longdoublearg = va_arg (ap, long double);
1547 break;
1548 #endif
1549 case TP_CHAR:
1550 (*argtable) [n].pchararg = va_arg (ap, char *);
1551 break;
1552 case TP_VOID:
1553 (*argtable) [n].pvoidarg = va_arg (ap, void *);
1554 break;
1555 case T_WINT:
1556 (*argtable) [n].wintarg = va_arg (ap, wint_t);
1557 break;
1558 case TP_WCHAR:
1559 (*argtable) [n].pwchararg = va_arg (ap, wchar_t *);
1560 break;
1561 }
1562 }
1563
1564 if ((typetable != NULL) && (typetable != stattypetable))
1565 free (typetable);
1566 }
1567
1568 /*
1569 * Increase the size of the type table.
1570 */
1571 static void
1572 __grow_type_table (int nextarg, enum typeid **typetable, int *tablesize)
1573 {
1574 enum typeid *const oldtable = *typetable;
1575 const int oldsize = *tablesize;
1576 enum typeid *newtable;
1577 int newsize = oldsize * 2;
1578
1579 if (newsize < nextarg + 1)
1580 newsize = nextarg + 1;
1581 if (oldsize == STATIC_ARG_TBL_SIZE) {
1582 if ((newtable = malloc(newsize)) == NULL)
1583 abort(); /* XXX handle better */
1584 bcopy(oldtable, newtable, oldsize);
1585 } else {
1586 if ((newtable = reallocf(oldtable, newsize)) == NULL)
1587 abort(); /* XXX handle better */
1588 }
1589 memset(&newtable[oldsize], T_UNUSED, newsize - oldsize);
1590
1591 *typetable = newtable;
1592 *tablesize = newsize;
1593 }
1594
1595
1596 #ifdef FLOATING_POINT
1597
1598 static int
1599 exponent(wchar_t *p0, int exp, wchar_t fmtch)
1600 {
1601 wchar_t *p, *t;
1602 wchar_t expbuf[MAXEXPDIG];
1603
1604 p = p0;
1605 *p++ = fmtch;
1606 if (exp < 0) {
1607 exp = -exp;
1608 *p++ = '-';
1609 }
1610 else
1611 *p++ = '+';
1612 t = expbuf + MAXEXPDIG;
1613 if (exp > 9) {
1614 do {
1615 *--t = to_char(exp % 10);
1616 } while ((exp /= 10) > 9);
1617 *--t = to_char(exp);
1618 for (; t < expbuf + MAXEXPDIG; *p++ = *t++);
1619 }
1620 else {
1621 /*
1622 * Exponents for decimal floating point conversions
1623 * (%[eEgG]) must be at least two characters long,
1624 * whereas exponents for hexadecimal conversions can
1625 * be only one character long.
1626 */
1627 if (fmtch == 'e' || fmtch == 'E')
1628 *p++ = '0';
1629 *p++ = to_char(exp);
1630 }
1631 return (p - p0);
1632 }
1633 #endif /* FLOATING_POINT */
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