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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 #if defined(LIBC_SCCS) && !defined(lint)
38 static char sccsid[] = "@(#)vfprintf.c 8.1 (Berkeley) 6/4/93";
39 #endif /* LIBC_SCCS and not lint */
40 #include <sys/cdefs.h>
41 __FBSDID("$FreeBSD: src/lib/libc/stdio/vfprintf.c,v 1.59 2003/04/19 23:53:19 das Exp $");
42
43 /*
44 * Actual printf innards.
45 *
46 * This code is large and complicated...
47 */
48
49 #include "namespace.h"
50 #include <sys/types.h>
51
52 #include <ctype.h>
53 #include <limits.h>
54 #include <locale.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
62 #include <stdarg.h>
63 #include "un-namespace.h"
64
65 #include "libc_private.h"
66 #include "local.h"
67 #include "fvwrite.h"
68
69 /* Define FLOATING_POINT to get floating point. */
70 #define FLOATING_POINT
71
72 union arg {
73 int intarg;
74 u_int uintarg;
75 long longarg;
76 u_long ulongarg;
77 long long longlongarg;
78 unsigned long long ulonglongarg;
79 ptrdiff_t ptrdiffarg;
80 size_t sizearg;
81 intmax_t intmaxarg;
82 uintmax_t uintmaxarg;
83 void *pvoidarg;
84 char *pchararg;
85 signed char *pschararg;
86 short *pshortarg;
87 int *pintarg;
88 long *plongarg;
89 long long *plonglongarg;
90 ptrdiff_t *pptrdiffarg;
91 size_t *psizearg;
92 intmax_t *pintmaxarg;
93 #ifdef FLOATING_POINT
94 double doublearg;
95 long double longdoublearg;
96 #endif
97 wint_t wintarg;
98 wchar_t *pwchararg;
99 };
100
101 /*
102 * Type ids for argument type table.
103 */
104 enum typeid {
105 T_UNUSED, TP_SHORT, T_INT, T_U_INT, TP_INT,
106 T_LONG, T_U_LONG, TP_LONG, T_LLONG, T_U_LLONG, TP_LLONG,
107 T_PTRDIFFT, TP_PTRDIFFT, T_SIZET, TP_SIZET,
108 T_INTMAXT, T_UINTMAXT, TP_INTMAXT, TP_VOID, TP_CHAR, TP_SCHAR,
109 T_DOUBLE, T_LONG_DOUBLE, T_WINT, TP_WCHAR
110 };
111
112 static int __sprint(FILE *, struct __suio *);
113 static int __sbprintf(FILE *, const char *, va_list) __printflike(2, 0);
114 static char *__ujtoa(uintmax_t, char *, int, int, const char *, int, char,
115 const char *);
116 static char *__ultoa(u_long, char *, int, int, const char *, int, char,
117 const char *);
118 static char *__wcsconv(wchar_t *, int);
119 static void __find_arguments(const char *, va_list, union arg **);
120 static void __grow_type_table(int, enum typeid **, int *);
121
122 /*
123 * Flush out all the vectors defined by the given uio,
124 * then reset it so that it can be reused.
125 */
126 static int
127 __sprint(FILE *fp, struct __suio *uio)
128 {
129 int err;
130
131 if (uio->uio_resid == 0) {
132 uio->uio_iovcnt = 0;
133 return (0);
134 }
135 err = __sfvwrite(fp, uio);
136 uio->uio_resid = 0;
137 uio->uio_iovcnt = 0;
138 return (err);
139 }
140
141 /*
142 * Helper function for `fprintf to unbuffered unix file': creates a
143 * temporary buffer. We only work on write-only files; this avoids
144 * worries about ungetc buffers and so forth.
145 */
146 static int
147 __sbprintf(FILE *fp, const char *fmt, va_list ap)
148 {
149 int ret;
150 FILE fake;
151 unsigned char buf[BUFSIZ];
152
153 /* copy the important variables */
154 fake._flags = fp->_flags & ~__SNBF;
155 fake._file = fp->_file;
156 fake._cookie = fp->_cookie;
157 fake._write = fp->_write;
158 fake._extra = fp->_extra;
159
160 /* set up the buffer */
161 fake._bf._base = fake._p = buf;
162 fake._bf._size = fake._w = sizeof(buf);
163 fake._lbfsize = 0; /* not actually used, but Just In Case */
164
165 /* do the work, then copy any error status */
166 ret = __vfprintf(&fake, fmt, ap);
167 if (ret >= 0 && __fflush(&fake))
168 ret = EOF;
169 if (fake._flags & __SERR)
170 fp->_flags |= __SERR;
171 return (ret);
172 }
173
174 /*
175 * Macros for converting digits to letters and vice versa
176 */
177 #define to_digit(c) ((c) - '0')
178 #define is_digit(c) ((unsigned)to_digit(c) <= 9)
179 #define to_char(n) ((n) + '0')
180
181 /*
182 * Convert an unsigned long to ASCII for printf purposes, returning
183 * a pointer to the first character of the string representation.
184 * Octal numbers can be forced to have a leading zero; hex numbers
185 * use the given digits.
186 */
187 static char *
188 __ultoa(u_long val, char *endp, int base, int octzero, const char *xdigs,
189 int needgrp, char thousep, const char *grp)
190 {
191 char *cp = endp;
192 long sval;
193 int ndig;
194
195 /*
196 * Handle the three cases separately, in the hope of getting
197 * better/faster code.
198 */
199 switch (base) {
200 case 10:
201 if (val < 10) { /* many numbers are 1 digit */
202 *--cp = to_char(val);
203 return (cp);
204 }
205 ndig = 0;
206 /*
207 * On many machines, unsigned arithmetic is harder than
208 * signed arithmetic, so we do at most one unsigned mod and
209 * divide; this is sufficient to reduce the range of
210 * the incoming value to where signed arithmetic works.
211 */
212 if (val > LONG_MAX) {
213 *--cp = to_char(val % 10);
214 ndig++;
215 sval = val / 10;
216 } else
217 sval = val;
218 do {
219 *--cp = to_char(sval % 10);
220 ndig++;
221 /*
222 * If (*grp == CHAR_MAX) then no more grouping
223 * should be performed.
224 */
225 if (needgrp && ndig == *grp && *grp != CHAR_MAX
226 && sval > 9) {
227 *--cp = thousep;
228 ndig = 0;
229 /*
230 * If (*(grp+1) == '\0') then we have to
231 * use *grp character (last grouping rule)
232 * for all next cases
233 */
234 if (*(grp+1) != '\0')
235 grp++;
236 }
237 sval /= 10;
238 } while (sval != 0);
239 break;
240
241 case 8:
242 do {
243 *--cp = to_char(val & 7);
244 val >>= 3;
245 } while (val);
246 if (octzero && *cp != '0')
247 *--cp = '0';
248 break;
249
250 case 16:
251 do {
252 *--cp = xdigs[val & 15];
253 val >>= 4;
254 } while (val);
255 break;
256
257 default: /* oops */
258 abort();
259 }
260 return (cp);
261 }
262
263 /* Identical to __ultoa, but for intmax_t. */
264 static char *
265 __ujtoa(uintmax_t val, char *endp, int base, int octzero, const char *xdigs,
266 int needgrp, char thousep, const char *grp)
267 {
268 char *cp = endp;
269 intmax_t sval;
270 int ndig;
271
272 /* quick test for small values; __ultoa is typically much faster */
273 /* (perhaps instead we should run until small, then call __ultoa?) */
274 if (val <= ULONG_MAX)
275 return (__ultoa((u_long)val, endp, base, octzero, xdigs,
276 needgrp, thousep, grp));
277 switch (base) {
278 case 10:
279 if (val < 10) {
280 *--cp = to_char(val % 10);
281 return (cp);
282 }
283 ndig = 0;
284 if (val > INTMAX_MAX) {
285 *--cp = to_char(val % 10);
286 ndig++;
287 sval = val / 10;
288 } else
289 sval = val;
290 do {
291 *--cp = to_char(sval % 10);
292 ndig++;
293 /*
294 * If (*grp == CHAR_MAX) then no more grouping
295 * should be performed.
296 */
297 if (needgrp && *grp != CHAR_MAX && ndig == *grp
298 && sval > 9) {
299 *--cp = thousep;
300 ndig = 0;
301 /*
302 * If (*(grp+1) == '\0') then we have to
303 * use *grp character (last grouping rule)
304 * for all next cases
305 */
306 if (*(grp+1) != '\0')
307 grp++;
308 }
309 sval /= 10;
310 } while (sval != 0);
311 break;
312
313 case 8:
314 do {
315 *--cp = to_char(val & 7);
316 val >>= 3;
317 } while (val);
318 if (octzero && *cp != '0')
319 *--cp = '0';
320 break;
321
322 case 16:
323 do {
324 *--cp = xdigs[val & 15];
325 val >>= 4;
326 } while (val);
327 break;
328
329 default:
330 abort();
331 }
332 return (cp);
333 }
334
335 /*
336 * Convert a wide character string argument for the %ls format to a multibyte
337 * string representation. ``prec'' specifies the maximum number of bytes
338 * to output. If ``prec'' is greater than or equal to zero, we can't assume
339 * that the wide char. string ends in a null character.
340 */
341 static char *
342 __wcsconv(wchar_t *wcsarg, int prec)
343 {
344 char buf[MB_LEN_MAX];
345 wchar_t *p;
346 char *convbuf, *mbp;
347 size_t clen, nbytes;
348 mbstate_t mbs;
349
350 /*
351 * Determine the number of bytes to output and allocate space for
352 * the output.
353 */
354 memset(&mbs, 0, sizeof(mbs));
355 if (prec >= 0) {
356 nbytes = 0;
357 p = wcsarg;
358 for (;;) {
359 clen = wcrtomb(buf, *p++, &mbs);
360 if (clen == 0 || clen == (size_t)-1 ||
361 nbytes + clen > prec)
362 break;
363 nbytes += clen;
364 }
365 } else {
366 p = wcsarg;
367 nbytes = wcsrtombs(NULL, (const wchar_t **)&p, 0, &mbs);
368 if (nbytes == (size_t)-1)
369 return (NULL);
370 }
371 if ((convbuf = malloc(nbytes + 1)) == NULL)
372 return (NULL);
373
374 /*
375 * Fill the output buffer with the multibyte representations of as
376 * many wide characters as will fit.
377 */
378 mbp = convbuf;
379 p = wcsarg;
380 memset(&mbs, 0, sizeof(mbs));
381 while (mbp - convbuf < nbytes) {
382 clen = wcrtomb(mbp, *p++, &mbs);
383 if (clen == 0 || clen == (size_t)-1)
384 break;
385 mbp += clen;
386 }
387 if (clen == (size_t)-1) {
388 free(convbuf);
389 return (NULL);
390 }
391 *mbp = '\0';
392
393 return (convbuf);
394 }
395
396 /*
397 * MT-safe version
398 */
399 int
400 vfprintf(FILE * __restrict fp, const char * __restrict fmt0, va_list ap)
401
402 {
403 int ret;
404
405 FLOCKFILE(fp);
406 ret = __vfprintf(fp, fmt0, ap);
407 FUNLOCKFILE(fp);
408 return (ret);
409 }
410
411 #ifdef FLOATING_POINT
412
413 #define dtoa __dtoa
414 #define freedtoa __freedtoa
415
416 #include <float.h>
417 #include <math.h>
418 #include "floatio.h"
419 #include "gdtoa.h"
420
421 #define DEFPREC 6
422
423 static int exponent(char *, int, int);
424
425 #endif /* FLOATING_POINT */
426
427 /*
428 * The size of the buffer we use as scratch space for integer
429 * conversions, among other things. Technically, we would need the
430 * most space for base 10 conversions with thousands' grouping
431 * characters between each pair of digits. 100 bytes is a
432 * conservative overestimate even for a 128-bit uintmax_t.
433 */
434 #define BUF 100
435
436 #define STATIC_ARG_TBL_SIZE 8 /* Size of static argument table. */
437
438 /*
439 * Flags used during conversion.
440 */
441 #define ALT 0x001 /* alternate form */
442 #define LADJUST 0x004 /* left adjustment */
443 #define LONGDBL 0x008 /* long double */
444 #define LONGINT 0x010 /* long integer */
445 #define LLONGINT 0x020 /* long long integer */
446 #define SHORTINT 0x040 /* short integer */
447 #define ZEROPAD 0x080 /* zero (as opposed to blank) pad */
448 #define FPT 0x100 /* Floating point number */
449 #define GROUPING 0x200 /* use grouping ("'" flag) */
450 /* C99 additional size modifiers: */
451 #define SIZET 0x400 /* size_t */
452 #define PTRDIFFT 0x800 /* ptrdiff_t */
453 #define INTMAXT 0x1000 /* intmax_t */
454 #define CHARINT 0x2000 /* print char using int format */
455
456 /*
457 * Non-MT-safe version
458 */
459 int
460 __vfprintf(FILE *fp, const char *fmt0, va_list ap)
461 {
462 char *fmt; /* format string */
463 int ch; /* character from fmt */
464 int n, n2; /* handy integer (short term usage) */
465 char *cp; /* handy char pointer (short term usage) */
466 struct __siov *iovp; /* for PRINT macro */
467 int flags; /* flags as above */
468 int ret; /* return value accumulator */
469 int width; /* width from format (%8d), or 0 */
470 int prec; /* precision from format; <0 for N/A */
471 char sign; /* sign prefix (' ', '+', '-', or \0) */
472 char thousands_sep; /* locale specific thousands separator */
473 const char *grouping; /* locale specific numeric grouping rules */
474 #ifdef FLOATING_POINT
475 /*
476 * We can decompose the printed representation of floating
477 * point numbers into several parts, some of which may be empty:
478 *
479 * [+|-| ] [0x|0X] MMM . NNN [e|E|p|P] [+|-] ZZ
480 * A B ---C--- D E F
481 *
482 * A: 'sign' holds this value if present; '\0' otherwise
483 * B: ox[1] holds the 'x' or 'X'; '\0' if not hexadecimal
484 * C: cp points to the string MMMNNN. Leading and trailing
485 * zeros are not in the string and must be added.
486 * D: expchar holds this character; '\0' if no exponent, e.g. %f
487 * F: at least two digits for decimal, at least one digit for hex
488 */
489 char *decimal_point; /* locale specific decimal point */
490 int signflag; /* true if float is negative */
491 union { /* floating point arguments %[aAeEfFgG] */
492 double dbl;
493 long double ldbl;
494 } fparg;
495 int expt; /* integer value of exponent */
496 char expchar; /* exponent character: [eEpP\0] */
497 char *dtoaend; /* pointer to end of converted digits */
498 int expsize; /* character count for expstr */
499 int lead; /* sig figs before decimal or group sep */
500 int ndig; /* actual number of digits returned by dtoa */
501 char expstr[MAXEXPDIG+2]; /* buffer for exponent string: e+ZZZ */
502 char *dtoaresult; /* buffer allocated by dtoa */
503 int nseps; /* number of group separators with ' */
504 int nrepeats; /* number of repeats of the last group */
505 #endif
506 u_long ulval; /* integer arguments %[diouxX] */
507 uintmax_t ujval; /* %j, %ll, %q, %t, %z integers */
508 int base; /* base for [diouxX] conversion */
509 int dprec; /* a copy of prec if [diouxX], 0 otherwise */
510 int realsz; /* field size expanded by dprec, sign, etc */
511 int size; /* size of converted field or string */
512 int prsize; /* max size of printed field */
513 const char *xdigs; /* digits for %[xX] conversion */
514 #define NIOV 8
515 struct __suio uio; /* output information: summary */
516 struct __siov iov[NIOV];/* ... and individual io vectors */
517 char buf[BUF]; /* buffer with space for digits of uintmax_t */
518 char ox[2]; /* space for 0x; ox[1] is either x, X, or \0 */
519 union arg *argtable; /* args, built due to positional arg */
520 union arg statargtable [STATIC_ARG_TBL_SIZE];
521 int nextarg; /* 1-based argument index */
522 va_list orgap; /* original argument pointer */
523 char *convbuf; /* wide to multibyte conversion result */
524
525 /*
526 * Choose PADSIZE to trade efficiency vs. size. If larger printf
527 * fields occur frequently, increase PADSIZE and make the initialisers
528 * below longer.
529 */
530 #define PADSIZE 16 /* pad chunk size */
531 static char blanks[PADSIZE] =
532 {' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' '};
533 static char zeroes[PADSIZE] =
534 {'0','0','0','0','0','0','0','0','0','0','0','0','0','0','0','0'};
535
536 static const char xdigs_lower[16] = "0123456789abcdef";
537 static const char xdigs_upper[16] = "0123456789ABCDEF";
538
539 /*
540 * BEWARE, these `goto error' on error, and PAD uses `n'.
541 */
542 #define PRINT(ptr, len) { \
543 iovp->iov_base = (ptr); \
544 iovp->iov_len = (len); \
545 uio.uio_resid += (len); \
546 iovp++; \
547 if (++uio.uio_iovcnt >= NIOV) { \
548 if (__sprint(fp, &uio)) \
549 goto error; \
550 iovp = iov; \
551 } \
552 }
553 #define PAD(howmany, with) { \
554 if ((n = (howmany)) > 0) { \
555 while (n > PADSIZE) { \
556 PRINT(with, PADSIZE); \
557 n -= PADSIZE; \
558 } \
559 PRINT(with, n); \
560 } \
561 }
562 #define PRINTANDPAD(p, ep, len, with) do { \
563 n2 = (ep) - (p); \
564 if (n2 > (len)) \
565 n2 = (len); \
566 if (n2 > 0) \
567 PRINT((p), n2); \
568 PAD((len) - (n2 > 0 ? n2 : 0), (with)); \
569 } while(0)
570 #define FLUSH() { \
571 if (uio.uio_resid && __sprint(fp, &uio)) \
572 goto error; \
573 uio.uio_iovcnt = 0; \
574 iovp = iov; \
575 }
576
577 /*
578 * Get the argument indexed by nextarg. If the argument table is
579 * built, use it to get the argument. If its not, get the next
580 * argument (and arguments must be gotten sequentially).
581 */
582 #define GETARG(type) \
583 ((argtable != NULL) ? *((type*)(&argtable[nextarg++])) : \
584 (nextarg++, va_arg(ap, type)))
585
586 /*
587 * To extend shorts properly, we need both signed and unsigned
588 * argument extraction methods.
589 */
590 #define SARG() \
591 (flags&LONGINT ? GETARG(long) : \
592 flags&SHORTINT ? (long)(short)GETARG(int) : \
593 flags&CHARINT ? (long)(signed char)GETARG(int) : \
594 (long)GETARG(int))
595 #define UARG() \
596 (flags&LONGINT ? GETARG(u_long) : \
597 flags&SHORTINT ? (u_long)(u_short)GETARG(int) : \
598 flags&CHARINT ? (u_long)(u_char)GETARG(int) : \
599 (u_long)GETARG(u_int))
600 #define INTMAX_SIZE (INTMAXT|SIZET|PTRDIFFT|LLONGINT)
601 #define SJARG() \
602 (flags&INTMAXT ? GETARG(intmax_t) : \
603 flags&SIZET ? (intmax_t)GETARG(size_t) : \
604 flags&PTRDIFFT ? (intmax_t)GETARG(ptrdiff_t) : \
605 (intmax_t)GETARG(long long))
606 #define UJARG() \
607 (flags&INTMAXT ? GETARG(uintmax_t) : \
608 flags&SIZET ? (uintmax_t)GETARG(size_t) : \
609 flags&PTRDIFFT ? (uintmax_t)GETARG(ptrdiff_t) : \
610 (uintmax_t)GETARG(unsigned long long))
611
612 /*
613 * Get * arguments, including the form *nn$. Preserve the nextarg
614 * that the argument can be gotten once the type is determined.
615 */
616 #define GETASTER(val) \
617 n2 = 0; \
618 cp = fmt; \
619 while (is_digit(*cp)) { \
620 n2 = 10 * n2 + to_digit(*cp); \
621 cp++; \
622 } \
623 if (*cp == '$') { \
624 int hold = nextarg; \
625 if (argtable == NULL) { \
626 argtable = statargtable; \
627 __find_arguments (fmt0, orgap, &argtable); \
628 } \
629 nextarg = n2; \
630 val = GETARG (int); \
631 nextarg = hold; \
632 fmt = ++cp; \
633 } else { \
634 val = GETARG (int); \
635 }
636
637
638 thousands_sep = '\0';
639 grouping = NULL;
640 convbuf = NULL;
641 #ifdef FLOATING_POINT
642 dtoaresult = NULL;
643 decimal_point = localeconv()->decimal_point;
644 #endif
645 /* sorry, fprintf(read_only_file, "") returns EOF, not 0 */
646 if (cantwrite(fp))
647 return (EOF);
648
649 /* optimise fprintf(stderr) (and other unbuffered Unix files) */
650 if ((fp->_flags & (__SNBF|__SWR|__SRW)) == (__SNBF|__SWR) &&
651 fp->_file >= 0)
652 return (__sbprintf(fp, fmt0, ap));
653
654 fmt = (char *)fmt0;
655 argtable = NULL;
656 nextarg = 1;
657 va_copy(orgap, ap);
658 uio.uio_iov = iovp = iov;
659 uio.uio_resid = 0;
660 uio.uio_iovcnt = 0;
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 mbstate_t mbs;
799 size_t mbseqlen;
800
801 memset(&mbs, 0, sizeof(mbs));
802 mbseqlen = wcrtomb(cp = buf,
803 (wchar_t)GETARG(wint_t), &mbs);
804 if (mbseqlen == (size_t)-1) {
805 fp->_flags |= __SERR;
806 goto error;
807 }
808 size = (int)mbseqlen;
809 } else {
810 *(cp = buf) = GETARG(int);
811 size = 1;
812 }
813 sign = '\0';
814 break;
815 case 'D':
816 flags |= LONGINT;
817 /*FALLTHROUGH*/
818 case 'd':
819 case 'i':
820 if (flags & INTMAX_SIZE) {
821 ujval = SJARG();
822 if ((intmax_t)ujval < 0) {
823 ujval = -ujval;
824 sign = '-';
825 }
826 } else {
827 ulval = SARG();
828 if ((long)ulval < 0) {
829 ulval = -ulval;
830 sign = '-';
831 }
832 }
833 base = 10;
834 goto number;
835 #ifdef FLOATING_POINT
836 #ifdef HEXFLOAT
837 case 'a':
838 case 'A':
839 if (ch == 'a') {
840 ox[1] = 'x';
841 xdigs = xdigs_lower;
842 expchar = 'p';
843 } else {
844 ox[1] = 'X';
845 xdigs = xdigs_upper;
846 expchar = 'P';
847 }
848 /*
849 * XXX We don't actually have a conversion
850 * XXX routine for this yet.
851 */
852 if (flags & LONGDBL) {
853 fparg.ldbl = (double)GETARG(long double);
854 dtoaresult = cp =
855 __hldtoa(fparg.ldbl, xdigs, prec,
856 &expt, &signflag, &dtoaend);
857 } else {
858 fparg.dbl = GETARG(double);
859 dtoaresult = cp =
860 __hdtoa(fparg.dbl, xdigs, prec,
861 &expt, &signflag, &dtoaend);
862 }
863 goto fp_begin;
864 #endif
865 case 'e':
866 case 'E':
867 expchar = ch;
868 if (prec < 0) /* account for digit before decpt */
869 prec = DEFPREC + 1;
870 else
871 prec++;
872 goto fp_begin;
873 case 'f':
874 case 'F':
875 expchar = '\0';
876 goto fp_begin;
877 case 'g':
878 case 'G':
879 expchar = ch - ('g' - 'e');
880 if (prec == 0)
881 prec = 1;
882 fp_begin:
883 if (prec < 0)
884 prec = DEFPREC;
885 if (dtoaresult != NULL)
886 freedtoa(dtoaresult);
887 if (flags & LONGDBL) {
888 fparg.ldbl = GETARG(long double);
889 dtoaresult = cp =
890 __ldtoa(&fparg.ldbl, expchar ? 2 : 3, prec,
891 &expt, &signflag, &dtoaend);
892 } else {
893 fparg.dbl = GETARG(double);
894 dtoaresult = cp =
895 dtoa(fparg.dbl, expchar ? 2 : 3, prec,
896 &expt, &signflag, &dtoaend);
897 if (expt == 9999)
898 expt = INT_MAX;
899 }
900 if (signflag)
901 sign = '-';
902 if (expt == INT_MAX) { /* inf or nan */
903 if (*cp == 'N') {
904 cp = (ch >= 'a') ? "nan" : "NAN";
905 sign = '\0';
906 } else
907 cp = (ch >= 'a') ? "inf" : "INF";
908 size = 3;
909 break;
910 }
911 flags |= FPT;
912 ndig = dtoaend - cp;
913 if (ch == 'g' || ch == 'G') {
914 if (expt > -4 && expt <= prec) {
915 /* Make %[gG] smell like %[fF] */
916 expchar = '\0';
917 if (flags & ALT)
918 prec -= expt;
919 else
920 prec = ndig - expt;
921 if (prec < 0)
922 prec = 0;
923 } else {
924 /*
925 * Make %[gG] smell like %[eE], but
926 * trim trailing zeroes if no # flag.
927 */
928 if (!(flags & ALT))
929 prec = ndig;
930 }
931 }
932 if (expchar) {
933 expsize = exponent(expstr, expt - 1, expchar);
934 size = expsize + prec;
935 if (prec > 1 || flags & ALT)
936 ++size;
937 } else {
938 /* space for digits before decimal point */
939 if (expt > 0)
940 size = expt;
941 else /* "0" */
942 size = 1;
943 /* space for decimal pt and following digits */
944 if (prec || flags & ALT)
945 size += prec + 1;
946 if (grouping && expt > 0) {
947 /* space for thousands' grouping */
948 nseps = nrepeats = 0;
949 lead = expt;
950 while (*grouping != CHAR_MAX) {
951 if (lead <= *grouping)
952 break;
953 lead -= *grouping;
954 if (*(grouping+1)) {
955 nseps++;
956 grouping++;
957 } else
958 nrepeats++;
959 }
960 size += nseps + nrepeats;
961 } else
962 lead = expt;
963 }
964 break;
965 #endif /* FLOATING_POINT */
966 case 'n':
967 /*
968 * Assignment-like behavior is specified if the
969 * value overflows or is otherwise unrepresentable.
970 * C99 says to use `signed char' for %hhn conversions.
971 */
972 if (flags & LLONGINT)
973 *GETARG(long long *) = ret;
974 else if (flags & SIZET)
975 *GETARG(ssize_t *) = (ssize_t)ret;
976 else if (flags & PTRDIFFT)
977 *GETARG(ptrdiff_t *) = ret;
978 else if (flags & INTMAXT)
979 *GETARG(intmax_t *) = ret;
980 else if (flags & LONGINT)
981 *GETARG(long *) = ret;
982 else if (flags & SHORTINT)
983 *GETARG(short *) = ret;
984 else if (flags & CHARINT)
985 *GETARG(signed char *) = ret;
986 else
987 *GETARG(int *) = ret;
988 continue; /* no output */
989 case 'O':
990 flags |= LONGINT;
991 /*FALLTHROUGH*/
992 case 'o':
993 if (flags & INTMAX_SIZE)
994 ujval = UJARG();
995 else
996 ulval = UARG();
997 base = 8;
998 goto nosign;
999 case 'p':
1000 /*-
1001 * ``The argument shall be a pointer to void. The
1002 * value of the pointer is converted to a sequence
1003 * of printable characters, in an implementation-
1004 * defined manner.''
1005 * -- ANSI X3J11
1006 */
1007 ujval = (uintmax_t)(uintptr_t)GETARG(void *);
1008 base = 16;
1009 xdigs = xdigs_lower;
1010 flags = flags | INTMAXT;
1011 ox[1] = 'x';
1012 goto nosign;
1013 case 'S':
1014 flags |= LONGINT;
1015 /*FALLTHROUGH*/
1016 case 's':
1017 if (flags & LONGINT) {
1018 wchar_t *wcp;
1019
1020 if (convbuf != NULL)
1021 free(convbuf);
1022 if ((wcp = GETARG(wchar_t *)) == NULL)
1023 cp = "(null)";
1024 else {
1025 convbuf = __wcsconv(wcp, prec);
1026 if (convbuf == NULL) {
1027 fp->_flags |= __SERR;
1028 goto error;
1029 }
1030 cp = convbuf;
1031 }
1032 } else if ((cp = GETARG(char *)) == NULL)
1033 cp = "(null)";
1034 if (prec >= 0) {
1035 /*
1036 * can't use strlen; can only look for the
1037 * NUL in the first `prec' characters, and
1038 * strlen() will go further.
1039 */
1040 char *p = memchr(cp, 0, (size_t)prec);
1041
1042 if (p != NULL) {
1043 size = p - cp;
1044 if (size > prec)
1045 size = prec;
1046 } else
1047 size = prec;
1048 } else
1049 size = strlen(cp);
1050 sign = '\0';
1051 break;
1052 case 'U':
1053 flags |= LONGINT;
1054 /*FALLTHROUGH*/
1055 case 'u':
1056 if (flags & INTMAX_SIZE)
1057 ujval = UJARG();
1058 else
1059 ulval = UARG();
1060 base = 10;
1061 goto nosign;
1062 case 'X':
1063 xdigs = xdigs_upper;
1064 goto hex;
1065 case 'x':
1066 xdigs = xdigs_lower;
1067 hex:
1068 if (flags & INTMAX_SIZE)
1069 ujval = UJARG();
1070 else
1071 ulval = UARG();
1072 base = 16;
1073 /* leading 0x/X only if non-zero */
1074 if (flags & ALT &&
1075 (flags & INTMAX_SIZE ? ujval != 0 : ulval != 0))
1076 ox[1] = ch;
1077
1078 flags &= ~GROUPING;
1079 /* unsigned conversions */
1080 nosign: sign = '\0';
1081 /*-
1082 * ``... diouXx conversions ... if a precision is
1083 * specified, the 0 flag will be ignored.''
1084 * -- ANSI X3J11
1085 */
1086 number: if ((dprec = prec) >= 0)
1087 flags &= ~ZEROPAD;
1088
1089 /*-
1090 * ``The result of converting a zero value with an
1091 * explicit precision of zero is no characters.''
1092 * -- ANSI X3J11
1093 */
1094 cp = buf + BUF;
1095 if (flags & INTMAX_SIZE) {
1096 if (ujval != 0 || prec != 0)
1097 cp = __ujtoa(ujval, cp, base,
1098 flags & ALT, xdigs,
1099 flags & GROUPING, thousands_sep,
1100 grouping);
1101 } else {
1102 if (ulval != 0 || prec != 0)
1103 cp = __ultoa(ulval, cp, base,
1104 flags & ALT, xdigs,
1105 flags & GROUPING, thousands_sep,
1106 grouping);
1107 }
1108 size = buf + BUF - cp;
1109 if (size > BUF) /* should never happen */
1110 abort();
1111 break;
1112 default: /* "%?" prints ?, unless ? is NUL */
1113 if (ch == '\0')
1114 goto done;
1115 /* pretend it was %c with argument ch */
1116 cp = buf;
1117 *cp = ch;
1118 size = 1;
1119 sign = '\0';
1120 break;
1121 }
1122
1123 /*
1124 * All reasonable formats wind up here. At this point, `cp'
1125 * points to a string which (if not flags&LADJUST) should be
1126 * padded out to `width' places. If flags&ZEROPAD, it should
1127 * first be prefixed by any sign or other prefix; otherwise,
1128 * it should be blank padded before the prefix is emitted.
1129 * After any left-hand padding and prefixing, emit zeroes
1130 * required by a decimal [diouxX] precision, then print the
1131 * string proper, then emit zeroes required by any leftover
1132 * floating precision; finally, if LADJUST, pad with blanks.
1133 *
1134 * Compute actual size, so we know how much to pad.
1135 * size excludes decimal prec; realsz includes it.
1136 */
1137 realsz = dprec > size ? dprec : size;
1138 if (sign)
1139 realsz++;
1140 else if (ox[1])
1141 realsz += 2;
1142
1143 prsize = width > realsz ? width : realsz;
1144 if ((unsigned)ret + prsize > INT_MAX) {
1145 ret = EOF;
1146 goto error;
1147 }
1148
1149 /* right-adjusting blank padding */
1150 if ((flags & (LADJUST|ZEROPAD)) == 0)
1151 PAD(width - realsz, blanks);
1152
1153 /* prefix */
1154 if (sign) {
1155 PRINT(&sign, 1);
1156 } else if (ox[1]) { /* ox[1] is either x, X, or \0 */
1157 ox[0] = '0';
1158 PRINT(ox, 2);
1159 }
1160
1161 /* right-adjusting zero padding */
1162 if ((flags & (LADJUST|ZEROPAD)) == ZEROPAD)
1163 PAD(width - realsz, zeroes);
1164
1165 /* leading zeroes from decimal precision */
1166 PAD(dprec - size, zeroes);
1167
1168 /* the string or number proper */
1169 #ifdef FLOATING_POINT
1170 if ((flags & FPT) == 0) {
1171 PRINT(cp, size);
1172 } else { /* glue together f_p fragments */
1173 if (!expchar) { /* %[fF] or sufficiently short %[gG] */
1174 if (expt <= 0) {
1175 PRINT(zeroes, 1);
1176 if (prec || flags & ALT)
1177 PRINT(decimal_point, 1);
1178 PAD(-expt, zeroes);
1179 /* already handled initial 0's */
1180 prec += expt;
1181 } else {
1182 PRINTANDPAD(cp, dtoaend, lead, zeroes);
1183 cp += lead;
1184 if (grouping) {
1185 while (nseps>0 || nrepeats>0) {
1186 if (nrepeats > 0)
1187 nrepeats--;
1188 else {
1189 grouping--;
1190 nseps--;
1191 }
1192 PRINT(&thousands_sep,
1193 1);
1194 PRINTANDPAD(cp,dtoaend,
1195 *grouping, zeroes);
1196 cp += *grouping;
1197 }
1198 if (cp > dtoaend)
1199 cp = dtoaend;
1200 }
1201 if (prec || flags & ALT)
1202 PRINT(decimal_point,1);
1203 }
1204 PRINTANDPAD(cp, dtoaend, prec, zeroes);
1205 } else { /* %[eE] or sufficiently long %[gG] */
1206 if (prec > 1 || flags & ALT) {
1207 buf[0] = *cp++;
1208 buf[1] = *decimal_point;
1209 PRINT(buf, 2);
1210 PRINT(cp, ndig-1);
1211 PAD(prec - ndig, zeroes);
1212 } else /* XeYYY */
1213 PRINT(cp, 1);
1214 PRINT(expstr, expsize);
1215 }
1216 }
1217 #else
1218 PRINT(cp, size);
1219 #endif
1220 /* left-adjusting padding (always blank) */
1221 if (flags & LADJUST)
1222 PAD(width - realsz, blanks);
1223
1224 /* finally, adjust ret */
1225 ret += prsize;
1226
1227 FLUSH(); /* copy out the I/O vectors */
1228 }
1229 done:
1230 FLUSH();
1231 error:
1232 #ifdef FLOATING_POINT
1233 if (dtoaresult != NULL)
1234 freedtoa(dtoaresult);
1235 #endif
1236 if (convbuf != NULL)
1237 free(convbuf);
1238 if (__sferror(fp))
1239 ret = EOF;
1240 if ((argtable != NULL) && (argtable != statargtable))
1241 free (argtable);
1242 return (ret);
1243 /* NOTREACHED */
1244 }
1245
1246 /*
1247 * Find all arguments when a positional parameter is encountered. Returns a
1248 * table, indexed by argument number, of pointers to each arguments. The
1249 * initial argument table should be an array of STATIC_ARG_TBL_SIZE entries.
1250 * It will be replaces with a malloc-ed one if it overflows.
1251 */
1252 static void
1253 __find_arguments (const char *fmt0, va_list ap, union arg **argtable)
1254 {
1255 char *fmt; /* format string */
1256 int ch; /* character from fmt */
1257 int n, n2; /* handy integer (short term usage) */
1258 char *cp; /* handy char pointer (short term usage) */
1259 int flags; /* flags as above */
1260 int width; /* width from format (%8d), or 0 */
1261 enum typeid *typetable; /* table of types */
1262 enum typeid stattypetable [STATIC_ARG_TBL_SIZE];
1263 int tablesize; /* current size of type table */
1264 int tablemax; /* largest used index in table */
1265 int nextarg; /* 1-based argument index */
1266
1267 /*
1268 * Add an argument type to the table, expanding if necessary.
1269 */
1270 #define ADDTYPE(type) \
1271 ((nextarg >= tablesize) ? \
1272 __grow_type_table(nextarg, &typetable, &tablesize) : 0, \
1273 (nextarg > tablemax) ? tablemax = nextarg : 0, \
1274 typetable[nextarg++] = type)
1275
1276 #define ADDSARG() \
1277 ((flags&INTMAXT) ? ADDTYPE(T_INTMAXT) : \
1278 ((flags&SIZET) ? ADDTYPE(T_SIZET) : \
1279 ((flags&PTRDIFFT) ? ADDTYPE(T_PTRDIFFT) : \
1280 ((flags&LLONGINT) ? ADDTYPE(T_LLONG) : \
1281 ((flags&LONGINT) ? ADDTYPE(T_LONG) : ADDTYPE(T_INT))))))
1282
1283 #define ADDUARG() \
1284 ((flags&INTMAXT) ? ADDTYPE(T_UINTMAXT) : \
1285 ((flags&SIZET) ? ADDTYPE(T_SIZET) : \
1286 ((flags&PTRDIFFT) ? ADDTYPE(T_PTRDIFFT) : \
1287 ((flags&LLONGINT) ? ADDTYPE(T_U_LLONG) : \
1288 ((flags&LONGINT) ? ADDTYPE(T_U_LONG) : ADDTYPE(T_U_INT))))))
1289
1290 /*
1291 * Add * arguments to the type array.
1292 */
1293 #define ADDASTER() \
1294 n2 = 0; \
1295 cp = fmt; \
1296 while (is_digit(*cp)) { \
1297 n2 = 10 * n2 + to_digit(*cp); \
1298 cp++; \
1299 } \
1300 if (*cp == '$') { \
1301 int hold = nextarg; \
1302 nextarg = n2; \
1303 ADDTYPE (T_INT); \
1304 nextarg = hold; \
1305 fmt = ++cp; \
1306 } else { \
1307 ADDTYPE (T_INT); \
1308 }
1309 fmt = (char *)fmt0;
1310 typetable = stattypetable;
1311 tablesize = STATIC_ARG_TBL_SIZE;
1312 tablemax = 0;
1313 nextarg = 1;
1314 memset (typetable, T_UNUSED, STATIC_ARG_TBL_SIZE);
1315
1316 /*
1317 * Scan the format for conversions (`%' character).
1318 */
1319 for (;;) {
1320 for (cp = fmt; (ch = *fmt) != '\0' && ch != '%'; fmt++)
1321 /* void */;
1322 if (ch == '\0')
1323 goto done;
1324 fmt++; /* skip over '%' */
1325
1326 flags = 0;
1327 width = 0;
1328
1329 rflag: ch = *fmt++;
1330 reswitch: switch (ch) {
1331 case ' ':
1332 case '#':
1333 goto rflag;
1334 case '*':
1335 ADDASTER ();
1336 goto rflag;
1337 case '-':
1338 case '+':
1339 case '\'':
1340 goto rflag;
1341 case '.':
1342 if ((ch = *fmt++) == '*') {
1343 ADDASTER ();
1344 goto rflag;
1345 }
1346 while (is_digit(ch)) {
1347 ch = *fmt++;
1348 }
1349 goto reswitch;
1350 case '0':
1351 goto rflag;
1352 case '1': case '2': case '3': case '4':
1353 case '5': case '6': case '7': case '8': case '9':
1354 n = 0;
1355 do {
1356 n = 10 * n + to_digit(ch);
1357 ch = *fmt++;
1358 } while (is_digit(ch));
1359 if (ch == '$') {
1360 nextarg = n;
1361 goto rflag;
1362 }
1363 width = n;
1364 goto reswitch;
1365 #ifdef FLOATING_POINT
1366 case 'L':
1367 flags |= LONGDBL;
1368 goto rflag;
1369 #endif
1370 case 'h':
1371 if (flags & SHORTINT) {
1372 flags &= ~SHORTINT;
1373 flags |= CHARINT;
1374 } else
1375 flags |= SHORTINT;
1376 goto rflag;
1377 case 'j':
1378 flags |= INTMAXT;
1379 goto rflag;
1380 case 'l':
1381 if (flags & LONGINT) {
1382 flags &= ~LONGINT;
1383 flags |= LLONGINT;
1384 } else
1385 flags |= LONGINT;
1386 goto rflag;
1387 case 'q':
1388 flags |= LLONGINT; /* not necessarily */
1389 goto rflag;
1390 case 't':
1391 flags |= PTRDIFFT;
1392 goto rflag;
1393 case 'z':
1394 flags |= SIZET;
1395 goto rflag;
1396 case 'C':
1397 flags |= LONGINT;
1398 /*FALLTHROUGH*/
1399 case 'c':
1400 if (flags & LONGINT)
1401 ADDTYPE(T_WINT);
1402 else
1403 ADDTYPE(T_INT);
1404 break;
1405 case 'D':
1406 flags |= LONGINT;
1407 /*FALLTHROUGH*/
1408 case 'd':
1409 case 'i':
1410 ADDSARG();
1411 break;
1412 #ifdef FLOATING_POINT
1413 #ifdef HEXFLOAT
1414 case 'a':
1415 case 'A':
1416 #endif
1417 case 'e':
1418 case 'E':
1419 case 'f':
1420 case 'g':
1421 case 'G':
1422 if (flags & LONGDBL)
1423 ADDTYPE(T_LONG_DOUBLE);
1424 else
1425 ADDTYPE(T_DOUBLE);
1426 break;
1427 #endif /* FLOATING_POINT */
1428 case 'n':
1429 if (flags & INTMAXT)
1430 ADDTYPE(TP_INTMAXT);
1431 else if (flags & PTRDIFFT)
1432 ADDTYPE(TP_PTRDIFFT);
1433 else if (flags & SIZET)
1434 ADDTYPE(TP_SIZET);
1435 else if (flags & LLONGINT)
1436 ADDTYPE(TP_LLONG);
1437 else if (flags & LONGINT)
1438 ADDTYPE(TP_LONG);
1439 else if (flags & SHORTINT)
1440 ADDTYPE(TP_SHORT);
1441 else if (flags & CHARINT)
1442 ADDTYPE(TP_SCHAR);
1443 else
1444 ADDTYPE(TP_INT);
1445 continue; /* no output */
1446 case 'O':
1447 flags |= LONGINT;
1448 /*FALLTHROUGH*/
1449 case 'o':
1450 ADDUARG();
1451 break;
1452 case 'p':
1453 ADDTYPE(TP_VOID);
1454 break;
1455 case 'S':
1456 flags |= LONGINT;
1457 /*FALLTHROUGH*/
1458 case 's':
1459 if (flags & LONGINT)
1460 ADDTYPE(TP_WCHAR);
1461 else
1462 ADDTYPE(TP_CHAR);
1463 break;
1464 case 'U':
1465 flags |= LONGINT;
1466 /*FALLTHROUGH*/
1467 case 'u':
1468 case 'X':
1469 case 'x':
1470 ADDUARG();
1471 break;
1472 default: /* "%?" prints ?, unless ? is NUL */
1473 if (ch == '\0')
1474 goto done;
1475 break;
1476 }
1477 }
1478 done:
1479 /*
1480 * Build the argument table.
1481 */
1482 if (tablemax >= STATIC_ARG_TBL_SIZE) {
1483 *argtable = (union arg *)
1484 malloc (sizeof (union arg) * (tablemax + 1));
1485 }
1486
1487 (*argtable) [0].intarg = 0;
1488 for (n = 1; n <= tablemax; n++) {
1489 switch (typetable [n]) {
1490 case T_UNUSED: /* whoops! */
1491 (*argtable) [n].intarg = va_arg (ap, int);
1492 break;
1493 case TP_SCHAR:
1494 (*argtable) [n].pschararg = va_arg (ap, signed char *);
1495 break;
1496 case TP_SHORT:
1497 (*argtable) [n].pshortarg = va_arg (ap, short *);
1498 break;
1499 case T_INT:
1500 (*argtable) [n].intarg = va_arg (ap, int);
1501 break;
1502 case T_U_INT:
1503 (*argtable) [n].uintarg = va_arg (ap, unsigned int);
1504 break;
1505 case TP_INT:
1506 (*argtable) [n].pintarg = va_arg (ap, int *);
1507 break;
1508 case T_LONG:
1509 (*argtable) [n].longarg = va_arg (ap, long);
1510 break;
1511 case T_U_LONG:
1512 (*argtable) [n].ulongarg = va_arg (ap, unsigned long);
1513 break;
1514 case TP_LONG:
1515 (*argtable) [n].plongarg = va_arg (ap, long *);
1516 break;
1517 case T_LLONG:
1518 (*argtable) [n].longlongarg = va_arg (ap, long long);
1519 break;
1520 case T_U_LLONG:
1521 (*argtable) [n].ulonglongarg = va_arg (ap, unsigned long long);
1522 break;
1523 case TP_LLONG:
1524 (*argtable) [n].plonglongarg = va_arg (ap, long long *);
1525 break;
1526 case T_PTRDIFFT:
1527 (*argtable) [n].ptrdiffarg = va_arg (ap, ptrdiff_t);
1528 break;
1529 case TP_PTRDIFFT:
1530 (*argtable) [n].pptrdiffarg = va_arg (ap, ptrdiff_t *);
1531 break;
1532 case T_SIZET:
1533 (*argtable) [n].sizearg = va_arg (ap, size_t);
1534 break;
1535 case TP_SIZET:
1536 (*argtable) [n].psizearg = va_arg (ap, ssize_t *);
1537 break;
1538 case T_INTMAXT:
1539 (*argtable) [n].intmaxarg = va_arg (ap, intmax_t);
1540 break;
1541 case T_UINTMAXT:
1542 (*argtable) [n].uintmaxarg = va_arg (ap, uintmax_t);
1543 break;
1544 case TP_INTMAXT:
1545 (*argtable) [n].pintmaxarg = va_arg (ap, intmax_t *);
1546 break;
1547 #ifdef FLOATING_POINT
1548 case T_DOUBLE:
1549 (*argtable) [n].doublearg = va_arg (ap, double);
1550 break;
1551 case T_LONG_DOUBLE:
1552 (*argtable) [n].longdoublearg = va_arg (ap, long double);
1553 break;
1554 #endif
1555 case TP_CHAR:
1556 (*argtable) [n].pchararg = va_arg (ap, char *);
1557 break;
1558 case TP_VOID:
1559 (*argtable) [n].pvoidarg = va_arg (ap, void *);
1560 break;
1561 case T_WINT:
1562 (*argtable) [n].wintarg = va_arg (ap, wint_t);
1563 break;
1564 case TP_WCHAR:
1565 (*argtable) [n].pwchararg = va_arg (ap, wchar_t *);
1566 break;
1567 }
1568 }
1569
1570 if ((typetable != NULL) && (typetable != stattypetable))
1571 free (typetable);
1572 }
1573
1574 /*
1575 * Increase the size of the type table.
1576 */
1577 static void
1578 __grow_type_table (int nextarg, enum typeid **typetable, int *tablesize)
1579 {
1580 enum typeid *const oldtable = *typetable;
1581 const int oldsize = *tablesize;
1582 enum typeid *newtable;
1583 int newsize = oldsize * 2;
1584
1585 if (newsize < nextarg + 1)
1586 newsize = nextarg + 1;
1587 if (oldsize == STATIC_ARG_TBL_SIZE) {
1588 if ((newtable = malloc(newsize)) == NULL)
1589 abort(); /* XXX handle better */
1590 bcopy(oldtable, newtable, oldsize);
1591 } else {
1592 if ((newtable = reallocf(oldtable, newsize)) == NULL)
1593 abort(); /* XXX handle better */
1594 }
1595 memset(&newtable[oldsize], T_UNUSED, newsize - oldsize);
1596
1597 *typetable = newtable;
1598 *tablesize = newsize;
1599 }
1600
1601
1602 #ifdef FLOATING_POINT
1603
1604 static int
1605 exponent(char *p0, int exp, int fmtch)
1606 {
1607 char *p, *t;
1608 char expbuf[MAXEXPDIG];
1609
1610 p = p0;
1611 *p++ = fmtch;
1612 if (exp < 0) {
1613 exp = -exp;
1614 *p++ = '-';
1615 }
1616 else
1617 *p++ = '+';
1618 t = expbuf + MAXEXPDIG;
1619 if (exp > 9) {
1620 do {
1621 *--t = to_char(exp % 10);
1622 } while ((exp /= 10) > 9);
1623 *--t = to_char(exp);
1624 for (; t < expbuf + MAXEXPDIG; *p++ = *t++);
1625 }
1626 else {
1627 /*
1628 * Exponents for decimal floating point conversions
1629 * (%[eEgG]) must be at least two characters long,
1630 * whereas exponents for hexadecimal conversions can
1631 * be only one character long.
1632 */
1633 if (fmtch == 'e' || fmtch == 'E')
1634 *p++ = '0';
1635 *p++ = to_char(exp);
1636 }
1637 return (p - p0);
1638 }
1639 #endif /* FLOATING_POINT */
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