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Commit | Line | Data |
---|---|---|
8a0efa53 CF |
1 | /* |
2 | FUNCTION | |
3 | <<vprintf>>, <<vfprintf>>, <<vsprintf>>---format argument list | |
4 | ||
5 | INDEX | |
6 | vprintf | |
7 | INDEX | |
8 | vfprintf | |
9 | INDEX | |
10 | vsprintf | |
11 | INDEX | |
12 | vsnprintf | |
13 | ||
14 | ANSI_SYNOPSIS | |
15 | #include <stdio.h> | |
16 | #include <stdarg.h> | |
17 | int vprintf(const char *<[fmt]>, va_list <[list]>); | |
18 | int vfprintf(FILE *<[fp]>, const char *<[fmt]>, va_list <[list]>); | |
19 | int vsprintf(char *<[str]>, const char *<[fmt]>, va_list <[list]>); | |
20 | int vsnprintf(char *<[str]>, size_t <[size]>, const char *<[fmt]>, va_list <[list]>); | |
21 | ||
22 | int _vprintf_r(void *<[reent]>, const char *<[fmt]>, | |
23 | va_list <[list]>); | |
24 | int _vfprintf_r(void *<[reent]>, FILE *<[fp]>, const char *<[fmt]>, | |
25 | va_list <[list]>); | |
26 | int _vsprintf_r(void *<[reent]>, char *<[str]>, const char *<[fmt]>, | |
27 | va_list <[list]>); | |
28 | int _vsnprintf_r(void *<[reent]>, char *<[str]>, size_t <[size]>, const char *<[fmt]>, | |
29 | va_list <[list]>); | |
30 | ||
31 | TRAD_SYNOPSIS | |
32 | #include <stdio.h> | |
33 | #include <varargs.h> | |
34 | int vprintf( <[fmt]>, <[list]>) | |
35 | char *<[fmt]>; | |
36 | va_list <[list]>; | |
37 | ||
38 | int vfprintf(<[fp]>, <[fmt]>, <[list]>) | |
39 | FILE *<[fp]>; | |
40 | char *<[fmt]>; | |
41 | va_list <[list]>; | |
42 | ||
43 | int vsprintf(<[str]>, <[fmt]>, <[list]>) | |
44 | char *<[str]>; | |
45 | char *<[fmt]>; | |
46 | va_list <[list]>; | |
47 | ||
48 | int vsnprintf(<[str]>, <[size]>, <[fmt]>, <[list]>) | |
49 | char *<[str]>; | |
50 | size_t <[size]>; | |
51 | char *<[fmt]>; | |
52 | va_list <[list]>; | |
53 | ||
54 | int _vprintf_r(<[reent]>, <[fmt]>, <[list]>) | |
55 | char *<[reent]>; | |
56 | char *<[fmt]>; | |
57 | va_list <[list]>; | |
58 | ||
59 | int _vfprintf_r(<[reent]>, <[fp]>, <[fmt]>, <[list]>) | |
60 | char *<[reent]>; | |
61 | FILE *<[fp]>; | |
62 | char *<[fmt]>; | |
63 | va_list <[list]>; | |
64 | ||
65 | int _vsprintf_r(<[reent]>, <[str]>, <[fmt]>, <[list]>) | |
66 | char *<[reent]>; | |
67 | char *<[str]>; | |
68 | char *<[fmt]>; | |
69 | va_list <[list]>; | |
70 | ||
71 | int _vsnprintf_r(<[reent]>, <[str]>, <[size]>, <[fmt]>, <[list]>) | |
72 | char *<[reent]>; | |
73 | char *<[str]>; | |
74 | size_t <[size]>; | |
75 | char *<[fmt]>; | |
76 | va_list <[list]>; | |
77 | ||
78 | DESCRIPTION | |
79 | <<vprintf>>, <<vfprintf>>, <<vsprintf>> and <<vsnprintf>> are (respectively) | |
80 | variants of <<printf>>, <<fprintf>>, <<sprintf>> and <<snprintf>>. They differ | |
81 | only in allowing their caller to pass the variable argument list as a | |
82 | <<va_list>> object (initialized by <<va_start>>) rather than directly | |
83 | accepting a variable number of arguments. | |
84 | ||
85 | RETURNS | |
86 | The return values are consistent with the corresponding functions: | |
87 | <<vsprintf>> returns the number of bytes in the output string, | |
88 | save that the concluding <<NULL>> is not counted. | |
89 | <<vprintf>> and <<vfprintf>> return the number of characters transmitted. | |
90 | If an error occurs, <<vprintf>> and <<vfprintf>> return <<EOF>>. No | |
91 | error returns occur for <<vsprintf>>. | |
92 | ||
93 | PORTABILITY | |
94 | ANSI C requires all three functions. | |
95 | ||
96 | Supporting OS subroutines required: <<close>>, <<fstat>>, <<isatty>>, | |
97 | <<lseek>>, <<read>>, <<sbrk>>, <<write>>. | |
98 | */ | |
99 | ||
100 | /*- | |
101 | * Copyright (c) 1990 The Regents of the University of California. | |
102 | * All rights reserved. | |
103 | * | |
104 | * This code is derived from software contributed to Berkeley by | |
105 | * Chris Torek. | |
106 | * | |
107 | * Redistribution and use in source and binary forms, with or without | |
108 | * modification, are permitted provided that the following conditions | |
109 | * are met: | |
110 | * 1. Redistributions of source code must retain the above copyright | |
111 | * notice, this list of conditions and the following disclaimer. | |
112 | * 2. Redistributions in binary form must reproduce the above copyright | |
113 | * notice, this list of conditions and the following disclaimer in the | |
114 | * documentation and/or other materials provided with the distribution. | |
115 | * 3. All advertising materials mentioning features or use of this software | |
116 | * must display the following acknowledgement: | |
117 | * This product includes software developed by the University of | |
118 | * California, Berkeley and its contributors. | |
119 | * 4. Neither the name of the University nor the names of its contributors | |
120 | * may be used to endorse or promote products derived from this software | |
121 | * without specific prior written permission. | |
122 | * | |
123 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND | |
124 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
125 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
126 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
127 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
128 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
129 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
130 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
131 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
132 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
133 | * SUCH DAMAGE. | |
134 | */ | |
135 | ||
136 | #if defined(LIBC_SCCS) && !defined(lint) | |
137 | /*static char *sccsid = "from: @(#)vfprintf.c 5.50 (Berkeley) 12/16/92";*/ | |
138 | static char *rcsid = "$Id$"; | |
139 | #endif /* LIBC_SCCS and not lint */ | |
140 | ||
141 | /* | |
142 | * Actual printf innards. | |
143 | * | |
144 | * This code is large and complicated... | |
145 | */ | |
146 | ||
147 | #ifdef INTEGER_ONLY | |
148 | #define VFPRINTF vfiprintf | |
149 | #define _VFPRINTF_R _vfiprintf_r | |
150 | #else | |
151 | #define VFPRINTF vfprintf | |
152 | #define _VFPRINTF_R _vfprintf_r | |
afecf2fa | 153 | #ifndef NO_FLOATING_POINT |
8a0efa53 CF |
154 | #define FLOATING_POINT |
155 | #endif | |
afecf2fa | 156 | #endif |
8a0efa53 CF |
157 | |
158 | #define _NO_LONGLONG | |
159 | #if defined WANT_PRINTF_LONG_LONG && defined __GNUC__ | |
160 | # undef _NO_LONGLONG | |
161 | #endif | |
162 | ||
163 | #include <_ansi.h> | |
164 | #include <stdio.h> | |
165 | #include <stdlib.h> | |
166 | #include <string.h> | |
167 | #include <reent.h> | |
168 | ||
169 | #ifdef _HAVE_STDC | |
170 | #include <stdarg.h> | |
171 | #else | |
172 | #include <varargs.h> | |
173 | #endif | |
174 | ||
175 | #include "local.h" | |
176 | #include "fvwrite.h" | |
177 | #include "vfieeefp.h" | |
178 | ||
6bdac416 JJ |
179 | /* Currently a test is made to see if long double processing is warranted. |
180 | This could be changed in the future should the _ldtoa_r code be | |
181 | preferred over _dtoa_r. */ | |
182 | #define _NO_LONGDBL | |
183 | #if defined WANT_IO_LONG_DBL && (LDBL_MANT_DIG > DBL_MANT_DIG) | |
184 | #undef _NO_LONGDBL | |
185 | #endif | |
186 | ||
8a0efa53 CF |
187 | /* |
188 | * Flush out all the vectors defined by the given uio, | |
189 | * then reset it so that it can be reused. | |
190 | */ | |
191 | static int | |
192 | __sprint(fp, uio) | |
193 | FILE *fp; | |
194 | register struct __suio *uio; | |
195 | { | |
196 | register int err; | |
197 | ||
198 | if (uio->uio_resid == 0) { | |
199 | uio->uio_iovcnt = 0; | |
200 | return (0); | |
201 | } | |
202 | err = __sfvwrite(fp, uio); | |
203 | uio->uio_resid = 0; | |
204 | uio->uio_iovcnt = 0; | |
205 | return (err); | |
206 | } | |
207 | ||
208 | /* | |
209 | * Helper function for `fprintf to unbuffered unix file': creates a | |
210 | * temporary buffer. We only work on write-only files; this avoids | |
211 | * worries about ungetc buffers and so forth. | |
212 | */ | |
213 | static int | |
214 | __sbprintf(fp, fmt, ap) | |
215 | register FILE *fp; | |
216 | const char *fmt; | |
217 | va_list ap; | |
218 | { | |
219 | int ret; | |
220 | FILE fake; | |
221 | unsigned char buf[BUFSIZ]; | |
222 | ||
223 | /* copy the important variables */ | |
224 | fake._data = fp->_data; | |
225 | fake._flags = fp->_flags & ~__SNBF; | |
226 | fake._file = fp->_file; | |
227 | fake._cookie = fp->_cookie; | |
228 | fake._write = fp->_write; | |
229 | ||
230 | /* set up the buffer */ | |
231 | fake._bf._base = fake._p = buf; | |
232 | fake._bf._size = fake._w = sizeof(buf); | |
233 | fake._lbfsize = 0; /* not actually used, but Just In Case */ | |
234 | ||
235 | /* do the work, then copy any error status */ | |
236 | ret = VFPRINTF(&fake, fmt, ap); | |
237 | if (ret >= 0 && fflush(&fake)) | |
238 | ret = EOF; | |
239 | if (fake._flags & __SERR) | |
240 | fp->_flags |= __SERR; | |
241 | return (ret); | |
242 | } | |
243 | ||
244 | ||
245 | #ifdef FLOATING_POINT | |
246 | #include <locale.h> | |
247 | #include <math.h> | |
248 | #include "floatio.h" | |
249 | ||
250 | #define BUF (MAXEXP+MAXFRACT+1) /* + decimal point */ | |
251 | #define DEFPREC 6 | |
252 | ||
6bdac416 | 253 | #ifdef _NO_LONGDBL |
8a0efa53 | 254 | static char *cvt _PARAMS((struct _reent *, double, int, int, char *, int *, int, int *)); |
6bdac416 JJ |
255 | #else |
256 | static char *cvt _PARAMS((struct _reent *, _LONG_DOUBLE, int, int, char *, int *, int, int *)); | |
b6182a09 | 257 | extern int _ldcheck _PARAMS((_LONG_DOUBLE *)); |
6bdac416 JJ |
258 | #endif |
259 | ||
8a0efa53 CF |
260 | static int exponent _PARAMS((char *, int, int)); |
261 | ||
262 | #else /* no FLOATING_POINT */ | |
263 | ||
264 | #define BUF 40 | |
265 | ||
266 | #endif /* FLOATING_POINT */ | |
267 | ||
268 | ||
269 | /* | |
270 | * Macros for converting digits to letters and vice versa | |
271 | */ | |
272 | #define to_digit(c) ((c) - '0') | |
273 | #define is_digit(c) ((unsigned)to_digit(c) <= 9) | |
274 | #define to_char(n) ((n) + '0') | |
275 | ||
276 | /* | |
277 | * Flags used during conversion. | |
278 | */ | |
279 | #define ALT 0x001 /* alternate form */ | |
280 | #define HEXPREFIX 0x002 /* add 0x or 0X prefix */ | |
281 | #define LADJUST 0x004 /* left adjustment */ | |
6bdac416 | 282 | #define LONGDBL 0x008 /* long double */ |
8a0efa53 | 283 | #define LONGINT 0x010 /* long integer */ |
6f637037 | 284 | #ifndef _NO_LONGLONG |
8a0efa53 | 285 | #define QUADINT 0x020 /* quad integer */ |
6f637037 AO |
286 | #else /* ifdef _NO_LONGLONG, make QUADINT equivalent to LONGINT, so |
287 | that %lld behaves the same as %ld, not as %d, as expected if: | |
288 | sizeof (long long) = sizeof long > sizeof int */ | |
289 | #define QUADINT LONGINT | |
290 | #endif | |
8a0efa53 CF |
291 | #define SHORTINT 0x040 /* short integer */ |
292 | #define ZEROPAD 0x080 /* zero (as opposed to blank) pad */ | |
293 | #define FPT 0x100 /* Floating point number */ | |
294 | ||
295 | int | |
296 | _DEFUN (VFPRINTF, (fp, fmt0, ap), | |
297 | FILE * fp _AND | |
298 | _CONST char *fmt0 _AND | |
299 | va_list ap) | |
300 | { | |
b0ba0ac2 | 301 | CHECK_INIT (fp); |
8a0efa53 CF |
302 | return _VFPRINTF_R (fp->_data, fp, fmt0, ap); |
303 | } | |
304 | ||
305 | int | |
306 | _DEFUN (_VFPRINTF_R, (data, fp, fmt0, ap), | |
307 | struct _reent *data _AND | |
308 | FILE * fp _AND | |
309 | _CONST char *fmt0 _AND | |
310 | va_list ap) | |
311 | { | |
312 | register char *fmt; /* format string */ | |
313 | register int ch; /* character from fmt */ | |
314 | register int n, m; /* handy integers (short term usage) */ | |
315 | register char *cp; /* handy char pointer (short term usage) */ | |
316 | register struct __siov *iovp;/* for PRINT macro */ | |
317 | register int flags; /* flags as above */ | |
318 | int ret; /* return value accumulator */ | |
319 | int width; /* width from format (%8d), or 0 */ | |
320 | int prec; /* precision from format (%.3d), or -1 */ | |
321 | char sign; /* sign prefix (' ', '+', '-', or \0) */ | |
322 | wchar_t wc; | |
323 | #ifdef FLOATING_POINT | |
324 | char *decimal_point = localeconv()->decimal_point; | |
325 | char softsign; /* temporary negative sign for floats */ | |
6bdac416 | 326 | #ifdef _NO_LONGDBL |
b294082c JJ |
327 | union { int i; double d; } _double_ = {0}; |
328 | #define _fpvalue (_double_.d) | |
6bdac416 | 329 | #else |
b294082c JJ |
330 | union { int i; _LONG_DOUBLE ld; } _long_double_ = {0}; |
331 | #define _fpvalue (_long_double_.ld) | |
b6182a09 | 332 | int tmp; |
6bdac416 | 333 | #endif |
8a0efa53 | 334 | int expt; /* integer value of exponent */ |
6bdac416 | 335 | int expsize = 0; /* character count for expstr */ |
8a0efa53 CF |
336 | int ndig; /* actual number of digits returned by cvt */ |
337 | char expstr[7]; /* buffer for exponent string */ | |
338 | #endif | |
339 | ||
340 | #ifndef _NO_LONGLONG | |
341 | #define quad_t long long | |
342 | #define u_quad_t unsigned long long | |
343 | #endif | |
344 | ||
345 | #ifndef _NO_LONGLONG | |
346 | u_quad_t _uquad; /* integer arguments %[diouxX] */ | |
347 | #else | |
348 | u_long _uquad; | |
349 | #endif | |
350 | enum { OCT, DEC, HEX } base;/* base for [diouxX] conversion */ | |
351 | int dprec; /* a copy of prec if [diouxX], 0 otherwise */ | |
352 | int realsz; /* field size expanded by dprec */ | |
353 | int size; /* size of converted field or string */ | |
6bdac416 | 354 | char *xdigs = NULL; /* digits for [xX] conversion */ |
8a0efa53 CF |
355 | #define NIOV 8 |
356 | struct __suio uio; /* output information: summary */ | |
357 | struct __siov iov[NIOV];/* ... and individual io vectors */ | |
358 | char buf[BUF]; /* space for %c, %[diouxX], %[eEfgG] */ | |
359 | char ox[2]; /* space for 0x hex-prefix */ | |
360 | int state = 0; /* mbtowc calls from library must not change state */ | |
361 | ||
362 | /* | |
363 | * Choose PADSIZE to trade efficiency vs. size. If larger printf | |
364 | * fields occur frequently, increase PADSIZE and make the initialisers | |
365 | * below longer. | |
366 | */ | |
367 | #define PADSIZE 16 /* pad chunk size */ | |
368 | static _CONST char blanks[PADSIZE] = | |
369 | {' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' '}; | |
370 | static _CONST char zeroes[PADSIZE] = | |
371 | {'0','0','0','0','0','0','0','0','0','0','0','0','0','0','0','0'}; | |
372 | ||
373 | /* | |
374 | * BEWARE, these `goto error' on error, and PAD uses `n'. | |
375 | */ | |
376 | #define PRINT(ptr, len) { \ | |
377 | iovp->iov_base = (ptr); \ | |
378 | iovp->iov_len = (len); \ | |
379 | uio.uio_resid += (len); \ | |
380 | iovp++; \ | |
381 | if (++uio.uio_iovcnt >= NIOV) { \ | |
382 | if (__sprint(fp, &uio)) \ | |
383 | goto error; \ | |
384 | iovp = iov; \ | |
385 | } \ | |
386 | } | |
387 | #define PAD(howmany, with) { \ | |
388 | if ((n = (howmany)) > 0) { \ | |
389 | while (n > PADSIZE) { \ | |
390 | PRINT(with, PADSIZE); \ | |
391 | n -= PADSIZE; \ | |
392 | } \ | |
393 | PRINT(with, n); \ | |
394 | } \ | |
395 | } | |
396 | #define FLUSH() { \ | |
397 | if (uio.uio_resid && __sprint(fp, &uio)) \ | |
398 | goto error; \ | |
399 | uio.uio_iovcnt = 0; \ | |
400 | iovp = iov; \ | |
401 | } | |
402 | ||
403 | /* | |
404 | * To extend shorts properly, we need both signed and unsigned | |
405 | * argument extraction methods. | |
406 | */ | |
407 | #ifndef _NO_LONGLONG | |
408 | #define SARG() \ | |
409 | (flags&QUADINT ? va_arg(ap, quad_t) : \ | |
410 | flags&LONGINT ? va_arg(ap, long) : \ | |
411 | flags&SHORTINT ? (long)(short)va_arg(ap, int) : \ | |
412 | (long)va_arg(ap, int)) | |
413 | #define UARG() \ | |
414 | (flags&QUADINT ? va_arg(ap, u_quad_t) : \ | |
415 | flags&LONGINT ? va_arg(ap, u_long) : \ | |
416 | flags&SHORTINT ? (u_long)(u_short)va_arg(ap, int) : \ | |
417 | (u_long)va_arg(ap, u_int)) | |
418 | #else | |
419 | #define SARG() \ | |
420 | (flags&LONGINT ? va_arg(ap, long) : \ | |
421 | flags&SHORTINT ? (long)(short)va_arg(ap, int) : \ | |
422 | (long)va_arg(ap, int)) | |
423 | #define UARG() \ | |
424 | (flags&LONGINT ? va_arg(ap, u_long) : \ | |
425 | flags&SHORTINT ? (u_long)(u_short)va_arg(ap, int) : \ | |
426 | (u_long)va_arg(ap, u_int)) | |
427 | #endif | |
428 | ||
8a0efa53 CF |
429 | /* sorry, fprintf(read_only_file, "") returns EOF, not 0 */ |
430 | if (cantwrite(fp)) | |
431 | return (EOF); | |
432 | ||
433 | /* optimise fprintf(stderr) (and other unbuffered Unix files) */ | |
434 | if ((fp->_flags & (__SNBF|__SWR|__SRW)) == (__SNBF|__SWR) && | |
435 | fp->_file >= 0) | |
436 | return (__sbprintf(fp, fmt0, ap)); | |
437 | ||
438 | fmt = (char *)fmt0; | |
439 | uio.uio_iov = iovp = iov; | |
440 | uio.uio_resid = 0; | |
441 | uio.uio_iovcnt = 0; | |
442 | ret = 0; | |
443 | ||
444 | /* | |
445 | * Scan the format for conversions (`%' character). | |
446 | */ | |
447 | for (;;) { | |
448 | cp = fmt; | |
449 | while ((n = _mbtowc_r(_REENT, &wc, fmt, MB_CUR_MAX, &state)) > 0) { | |
450 | fmt += n; | |
451 | if (wc == '%') { | |
452 | fmt--; | |
453 | break; | |
454 | } | |
455 | } | |
456 | if ((m = fmt - cp) != 0) { | |
457 | PRINT(cp, m); | |
458 | ret += m; | |
459 | } | |
460 | if (n <= 0) | |
461 | goto done; | |
462 | fmt++; /* skip over '%' */ | |
463 | ||
464 | flags = 0; | |
465 | dprec = 0; | |
466 | width = 0; | |
467 | prec = -1; | |
468 | sign = '\0'; | |
469 | ||
470 | rflag: ch = *fmt++; | |
471 | reswitch: switch (ch) { | |
472 | case ' ': | |
473 | /* | |
474 | * ``If the space and + flags both appear, the space | |
475 | * flag will be ignored.'' | |
476 | * -- ANSI X3J11 | |
477 | */ | |
478 | if (!sign) | |
479 | sign = ' '; | |
480 | goto rflag; | |
481 | case '#': | |
482 | flags |= ALT; | |
483 | goto rflag; | |
484 | case '*': | |
485 | /* | |
486 | * ``A negative field width argument is taken as a | |
487 | * - flag followed by a positive field width.'' | |
488 | * -- ANSI X3J11 | |
489 | * They don't exclude field widths read from args. | |
490 | */ | |
491 | if ((width = va_arg(ap, int)) >= 0) | |
492 | goto rflag; | |
493 | width = -width; | |
494 | /* FALLTHROUGH */ | |
495 | case '-': | |
496 | flags |= LADJUST; | |
497 | goto rflag; | |
498 | case '+': | |
499 | sign = '+'; | |
500 | goto rflag; | |
501 | case '.': | |
502 | if ((ch = *fmt++) == '*') { | |
503 | n = va_arg(ap, int); | |
504 | prec = n < 0 ? -1 : n; | |
505 | goto rflag; | |
506 | } | |
507 | n = 0; | |
508 | while (is_digit(ch)) { | |
509 | n = 10 * n + to_digit(ch); | |
510 | ch = *fmt++; | |
511 | } | |
512 | prec = n < 0 ? -1 : n; | |
513 | goto reswitch; | |
514 | case '0': | |
515 | /* | |
516 | * ``Note that 0 is taken as a flag, not as the | |
517 | * beginning of a field width.'' | |
518 | * -- ANSI X3J11 | |
519 | */ | |
520 | flags |= ZEROPAD; | |
521 | goto rflag; | |
522 | case '1': case '2': case '3': case '4': | |
523 | case '5': case '6': case '7': case '8': case '9': | |
524 | n = 0; | |
525 | do { | |
526 | n = 10 * n + to_digit(ch); | |
527 | ch = *fmt++; | |
528 | } while (is_digit(ch)); | |
529 | width = n; | |
530 | goto reswitch; | |
531 | #ifdef FLOATING_POINT | |
532 | case 'L': | |
533 | flags |= LONGDBL; | |
534 | goto rflag; | |
535 | #endif | |
536 | case 'h': | |
537 | flags |= SHORTINT; | |
538 | goto rflag; | |
539 | case 'l': | |
540 | if (*fmt == 'l') { | |
541 | fmt++; | |
542 | flags |= QUADINT; | |
543 | } else { | |
544 | flags |= LONGINT; | |
545 | } | |
546 | goto rflag; | |
547 | case 'q': | |
548 | flags |= QUADINT; | |
549 | goto rflag; | |
550 | case 'c': | |
551 | *(cp = buf) = va_arg(ap, int); | |
552 | size = 1; | |
553 | sign = '\0'; | |
554 | break; | |
555 | case 'D': | |
556 | flags |= LONGINT; | |
557 | /*FALLTHROUGH*/ | |
558 | case 'd': | |
559 | case 'i': | |
560 | _uquad = SARG(); | |
561 | #ifndef _NO_LONGLONG | |
562 | if ((quad_t)_uquad < 0) | |
563 | #else | |
564 | if ((long) _uquad < 0) | |
565 | #endif | |
566 | { | |
567 | ||
568 | _uquad = -_uquad; | |
569 | sign = '-'; | |
570 | } | |
571 | base = DEC; | |
572 | goto number; | |
573 | #ifdef FLOATING_POINT | |
574 | case 'e': | |
575 | case 'E': | |
576 | case 'f': | |
577 | case 'g': | |
578 | case 'G': | |
579 | if (prec == -1) { | |
580 | prec = DEFPREC; | |
581 | } else if ((ch == 'g' || ch == 'G') && prec == 0) { | |
582 | prec = 1; | |
583 | } | |
584 | ||
6bdac416 JJ |
585 | #ifdef _NO_LONGDBL |
586 | if (flags & LONGDBL) { | |
587 | _fpvalue = (double) va_arg(ap, _LONG_DOUBLE); | |
588 | } else { | |
589 | _fpvalue = va_arg(ap, double); | |
590 | } | |
591 | ||
592 | /* do this before tricky precision changes */ | |
593 | if (isinf(_fpvalue)) { | |
594 | if (_fpvalue < 0) | |
595 | sign = '-'; | |
596 | cp = "Inf"; | |
597 | size = 3; | |
598 | break; | |
599 | } | |
600 | if (isnan(_fpvalue)) { | |
601 | cp = "NaN"; | |
602 | size = 3; | |
603 | break; | |
604 | } | |
605 | ||
606 | #else /* !_NO_LONGDBL */ | |
607 | ||
8a0efa53 | 608 | if (flags & LONGDBL) { |
6bdac416 | 609 | _fpvalue = va_arg(ap, _LONG_DOUBLE); |
8a0efa53 | 610 | } else { |
6bdac416 | 611 | _fpvalue = (_LONG_DOUBLE)va_arg(ap, double); |
8a0efa53 CF |
612 | } |
613 | ||
614 | /* do this before tricky precision changes */ | |
b6182a09 JJ |
615 | tmp = _ldcheck (&_fpvalue); |
616 | if (tmp == 2) { | |
6bdac416 | 617 | if (_fpvalue < 0) |
8a0efa53 CF |
618 | sign = '-'; |
619 | cp = "Inf"; | |
620 | size = 3; | |
621 | break; | |
622 | } | |
b6182a09 | 623 | if (tmp == 1) { |
8a0efa53 CF |
624 | cp = "NaN"; |
625 | size = 3; | |
626 | break; | |
627 | } | |
6bdac416 | 628 | #endif /* !_NO_LONGDBL */ |
8a0efa53 CF |
629 | |
630 | flags |= FPT; | |
6bdac416 JJ |
631 | |
632 | cp = cvt(data, _fpvalue, prec, flags, &softsign, | |
8a0efa53 | 633 | &expt, ch, &ndig); |
6bdac416 | 634 | |
8a0efa53 CF |
635 | if (ch == 'g' || ch == 'G') { |
636 | if (expt <= -4 || expt > prec) | |
637 | ch = (ch == 'g') ? 'e' : 'E'; | |
638 | else | |
639 | ch = 'g'; | |
640 | } | |
641 | if (ch <= 'e') { /* 'e' or 'E' fmt */ | |
642 | --expt; | |
643 | expsize = exponent(expstr, expt, ch); | |
644 | size = expsize + ndig; | |
645 | if (ndig > 1 || flags & ALT) | |
646 | ++size; | |
647 | } else if (ch == 'f') { /* f fmt */ | |
648 | if (expt > 0) { | |
649 | size = expt; | |
650 | if (prec || flags & ALT) | |
651 | size += prec + 1; | |
652 | } else /* "0.X" */ | |
653 | size = prec + 2; | |
654 | } else if (expt >= ndig) { /* fixed g fmt */ | |
655 | size = expt; | |
656 | if (flags & ALT) | |
657 | ++size; | |
658 | } else | |
659 | size = ndig + (expt > 0 ? | |
660 | 1 : 2 - expt); | |
661 | ||
662 | if (softsign) | |
663 | sign = '-'; | |
664 | break; | |
665 | #endif /* FLOATING_POINT */ | |
666 | case 'n': | |
667 | #ifndef _NO_LONGLONG | |
668 | if (flags & QUADINT) | |
669 | *va_arg(ap, quad_t *) = ret; | |
670 | else | |
671 | #endif | |
672 | if (flags & LONGINT) | |
673 | *va_arg(ap, long *) = ret; | |
674 | else if (flags & SHORTINT) | |
675 | *va_arg(ap, short *) = ret; | |
676 | else | |
677 | *va_arg(ap, int *) = ret; | |
678 | continue; /* no output */ | |
679 | case 'O': | |
680 | flags |= LONGINT; | |
681 | /*FALLTHROUGH*/ | |
682 | case 'o': | |
683 | _uquad = UARG(); | |
684 | base = OCT; | |
685 | goto nosign; | |
686 | case 'p': | |
687 | /* | |
688 | * ``The argument shall be a pointer to void. The | |
689 | * value of the pointer is converted to a sequence | |
690 | * of printable characters, in an implementation- | |
691 | * defined manner.'' | |
692 | * -- ANSI X3J11 | |
693 | */ | |
694 | /* NOSTRICT */ | |
695 | _uquad = (u_long)(unsigned _POINTER_INT)va_arg(ap, void *); | |
696 | base = HEX; | |
697 | xdigs = "0123456789abcdef"; | |
698 | flags |= HEXPREFIX; | |
699 | ch = 'x'; | |
700 | goto nosign; | |
701 | case 's': | |
702 | if ((cp = va_arg(ap, char *)) == NULL) | |
703 | cp = "(null)"; | |
704 | if (prec >= 0) { | |
705 | /* | |
706 | * can't use strlen; can only look for the | |
707 | * NUL in the first `prec' characters, and | |
708 | * strlen() will go further. | |
709 | */ | |
710 | char *p = memchr(cp, 0, prec); | |
711 | ||
712 | if (p != NULL) { | |
713 | size = p - cp; | |
714 | if (size > prec) | |
715 | size = prec; | |
716 | } else | |
717 | size = prec; | |
718 | } else | |
719 | size = strlen(cp); | |
720 | sign = '\0'; | |
721 | break; | |
722 | case 'U': | |
723 | flags |= LONGINT; | |
724 | /*FALLTHROUGH*/ | |
725 | case 'u': | |
726 | _uquad = UARG(); | |
727 | base = DEC; | |
728 | goto nosign; | |
729 | case 'X': | |
730 | xdigs = "0123456789ABCDEF"; | |
731 | goto hex; | |
732 | case 'x': | |
733 | xdigs = "0123456789abcdef"; | |
734 | hex: _uquad = UARG(); | |
735 | base = HEX; | |
736 | /* leading 0x/X only if non-zero */ | |
737 | if (flags & ALT && _uquad != 0) | |
738 | flags |= HEXPREFIX; | |
739 | ||
740 | /* unsigned conversions */ | |
741 | nosign: sign = '\0'; | |
742 | /* | |
743 | * ``... diouXx conversions ... if a precision is | |
744 | * specified, the 0 flag will be ignored.'' | |
745 | * -- ANSI X3J11 | |
746 | */ | |
747 | number: if ((dprec = prec) >= 0) | |
748 | flags &= ~ZEROPAD; | |
749 | ||
750 | /* | |
751 | * ``The result of converting a zero value with an | |
752 | * explicit precision of zero is no characters.'' | |
753 | * -- ANSI X3J11 | |
754 | */ | |
755 | cp = buf + BUF; | |
756 | if (_uquad != 0 || prec != 0) { | |
757 | /* | |
758 | * Unsigned mod is hard, and unsigned mod | |
759 | * by a constant is easier than that by | |
760 | * a variable; hence this switch. | |
761 | */ | |
762 | switch (base) { | |
763 | case OCT: | |
764 | do { | |
765 | *--cp = to_char(_uquad & 7); | |
766 | _uquad >>= 3; | |
767 | } while (_uquad); | |
768 | /* handle octal leading 0 */ | |
769 | if (flags & ALT && *cp != '0') | |
770 | *--cp = '0'; | |
771 | break; | |
772 | ||
773 | case DEC: | |
774 | /* many numbers are 1 digit */ | |
775 | while (_uquad >= 10) { | |
776 | *--cp = to_char(_uquad % 10); | |
777 | _uquad /= 10; | |
778 | } | |
779 | *--cp = to_char(_uquad); | |
780 | break; | |
781 | ||
782 | case HEX: | |
783 | do { | |
784 | *--cp = xdigs[_uquad & 15]; | |
785 | _uquad >>= 4; | |
786 | } while (_uquad); | |
787 | break; | |
788 | ||
789 | default: | |
790 | cp = "bug in vfprintf: bad base"; | |
791 | size = strlen(cp); | |
792 | goto skipsize; | |
793 | } | |
794 | } | |
188bc140 NC |
795 | /* |
796 | * ...result is to be converted to an 'alternate form'. | |
797 | * For o conversion, it increases the precision to force | |
798 | * the first digit of the result to be a zero." | |
799 | * -- ANSI X3J11 | |
800 | * | |
801 | * To demonstrate this case, compile and run: | |
802 | * printf ("%#.0o",0); | |
803 | */ | |
804 | else if (base == OCT && (flags & ALT)) | |
805 | *--cp = '0'; | |
806 | ||
8a0efa53 CF |
807 | size = buf + BUF - cp; |
808 | skipsize: | |
809 | break; | |
810 | default: /* "%?" prints ?, unless ? is NUL */ | |
811 | if (ch == '\0') | |
812 | goto done; | |
813 | /* pretend it was %c with argument ch */ | |
814 | cp = buf; | |
815 | *cp = ch; | |
816 | size = 1; | |
817 | sign = '\0'; | |
818 | break; | |
819 | } | |
820 | ||
821 | /* | |
822 | * All reasonable formats wind up here. At this point, `cp' | |
823 | * points to a string which (if not flags&LADJUST) should be | |
824 | * padded out to `width' places. If flags&ZEROPAD, it should | |
825 | * first be prefixed by any sign or other prefix; otherwise, | |
826 | * it should be blank padded before the prefix is emitted. | |
827 | * After any left-hand padding and prefixing, emit zeroes | |
828 | * required by a decimal [diouxX] precision, then print the | |
829 | * string proper, then emit zeroes required by any leftover | |
830 | * floating precision; finally, if LADJUST, pad with blanks. | |
831 | * | |
832 | * Compute actual size, so we know how much to pad. | |
833 | * size excludes decimal prec; realsz includes it. | |
834 | */ | |
835 | realsz = dprec > size ? dprec : size; | |
836 | if (sign) | |
837 | realsz++; | |
838 | else if (flags & HEXPREFIX) | |
839 | realsz+= 2; | |
840 | ||
841 | /* right-adjusting blank padding */ | |
842 | if ((flags & (LADJUST|ZEROPAD)) == 0) | |
843 | PAD(width - realsz, blanks); | |
844 | ||
845 | /* prefix */ | |
846 | if (sign) { | |
847 | PRINT(&sign, 1); | |
848 | } else if (flags & HEXPREFIX) { | |
849 | ox[0] = '0'; | |
850 | ox[1] = ch; | |
851 | PRINT(ox, 2); | |
852 | } | |
853 | ||
854 | /* right-adjusting zero padding */ | |
855 | if ((flags & (LADJUST|ZEROPAD)) == ZEROPAD) | |
856 | PAD(width - realsz, zeroes); | |
857 | ||
858 | /* leading zeroes from decimal precision */ | |
859 | PAD(dprec - size, zeroes); | |
860 | ||
861 | /* the string or number proper */ | |
862 | #ifdef FLOATING_POINT | |
863 | if ((flags & FPT) == 0) { | |
864 | PRINT(cp, size); | |
865 | } else { /* glue together f_p fragments */ | |
866 | if (ch >= 'f') { /* 'f' or 'g' */ | |
6bdac416 | 867 | if (_fpvalue == 0) { |
8a0efa53 CF |
868 | /* kludge for __dtoa irregularity */ |
869 | PRINT("0", 1); | |
870 | if (expt < ndig || (flags & ALT) != 0) { | |
871 | PRINT(decimal_point, 1); | |
872 | PAD(ndig - 1, zeroes); | |
873 | } | |
874 | } else if (expt <= 0) { | |
875 | PRINT("0", 1); | |
e9cd87b8 | 876 | if(expt || ndig) { |
5bacbf10 JJ |
877 | PRINT(decimal_point, 1); |
878 | PAD(-expt, zeroes); | |
879 | PRINT(cp, ndig); | |
880 | } | |
8a0efa53 CF |
881 | } else if (expt >= ndig) { |
882 | PRINT(cp, ndig); | |
883 | PAD(expt - ndig, zeroes); | |
884 | if (flags & ALT) | |
885 | PRINT(".", 1); | |
886 | } else { | |
887 | PRINT(cp, expt); | |
888 | cp += expt; | |
889 | PRINT(".", 1); | |
890 | PRINT(cp, ndig-expt); | |
891 | } | |
892 | } else { /* 'e' or 'E' */ | |
893 | if (ndig > 1 || flags & ALT) { | |
894 | ox[0] = *cp++; | |
895 | ox[1] = '.'; | |
896 | PRINT(ox, 2); | |
6bdac416 | 897 | if (_fpvalue) { |
8a0efa53 CF |
898 | PRINT(cp, ndig-1); |
899 | } else /* 0.[0..] */ | |
900 | /* __dtoa irregularity */ | |
901 | PAD(ndig - 1, zeroes); | |
902 | } else /* XeYYY */ | |
903 | PRINT(cp, 1); | |
904 | PRINT(expstr, expsize); | |
905 | } | |
906 | } | |
907 | #else | |
908 | PRINT(cp, size); | |
909 | #endif | |
910 | /* left-adjusting padding (always blank) */ | |
911 | if (flags & LADJUST) | |
912 | PAD(width - realsz, blanks); | |
913 | ||
914 | /* finally, adjust ret */ | |
915 | ret += width > realsz ? width : realsz; | |
916 | ||
917 | FLUSH(); /* copy out the I/O vectors */ | |
918 | } | |
919 | done: | |
920 | FLUSH(); | |
921 | error: | |
922 | return (__sferror(fp) ? EOF : ret); | |
923 | /* NOTREACHED */ | |
924 | } | |
925 | ||
926 | #ifdef FLOATING_POINT | |
927 | ||
6bdac416 | 928 | #ifdef _NO_LONGDBL |
8a0efa53 CF |
929 | extern char *_dtoa_r _PARAMS((struct _reent *, double, int, |
930 | int, int *, int *, char **)); | |
6bdac416 JJ |
931 | #else |
932 | extern char *_ldtoa_r _PARAMS((struct _reent *, _LONG_DOUBLE, int, | |
933 | int, int *, int *, char **)); | |
934 | #undef word0 | |
935 | #define word0(x) ldword0(x) | |
6bdac416 | 936 | #endif |
8a0efa53 CF |
937 | |
938 | static char * | |
939 | cvt(data, value, ndigits, flags, sign, decpt, ch, length) | |
940 | struct _reent *data; | |
6bdac416 | 941 | #ifdef _NO_LONGDBL |
8a0efa53 | 942 | double value; |
6bdac416 JJ |
943 | #else |
944 | _LONG_DOUBLE value; | |
945 | #endif | |
8a0efa53 CF |
946 | int ndigits, flags, *decpt, ch, *length; |
947 | char *sign; | |
948 | { | |
949 | int mode, dsgn; | |
950 | char *digits, *bp, *rve; | |
6bdac416 | 951 | #ifdef _NO_LONGDBL |
8a0efa53 | 952 | union double_union tmp; |
6bdac416 JJ |
953 | #else |
954 | struct ldieee *ldptr; | |
955 | #endif | |
8a0efa53 CF |
956 | |
957 | if (ch == 'f') { | |
958 | mode = 3; /* ndigits after the decimal point */ | |
959 | } else { | |
960 | /* To obtain ndigits after the decimal point for the 'e' | |
961 | * and 'E' formats, round to ndigits + 1 significant | |
962 | * figures. | |
963 | */ | |
964 | if (ch == 'e' || ch == 'E') { | |
965 | ndigits++; | |
966 | } | |
967 | mode = 2; /* ndigits significant digits */ | |
968 | } | |
969 | ||
6bdac416 | 970 | #ifdef _NO_LONGDBL |
8a0efa53 | 971 | tmp.d = value; |
6bdac416 | 972 | |
8a0efa53 CF |
973 | if (word0(tmp) & Sign_bit) { /* this will check for < 0 and -0.0 */ |
974 | value = -value; | |
975 | *sign = '-'; | |
976 | } else | |
977 | *sign = '\000'; | |
6bdac416 | 978 | |
8a0efa53 | 979 | digits = _dtoa_r(data, value, mode, ndigits, decpt, &dsgn, &rve); |
6bdac416 JJ |
980 | #else /* !_NO_LONGDBL */ |
981 | ldptr = (struct ldieee *)&value; | |
982 | if (ldptr->sign) { /* this will check for < 0 and -0.0 */ | |
983 | value = -value; | |
984 | *sign = '-'; | |
985 | } else | |
986 | *sign = '\000'; | |
987 | ||
988 | digits = _ldtoa_r(data, value, mode, ndigits, decpt, &dsgn, &rve); | |
989 | #endif /* !_NO_LONGDBL */ | |
990 | ||
8a0efa53 CF |
991 | if ((ch != 'g' && ch != 'G') || flags & ALT) { /* Print trailing zeros */ |
992 | bp = digits + ndigits; | |
993 | if (ch == 'f') { | |
994 | if (*digits == '0' && value) | |
995 | *decpt = -ndigits + 1; | |
996 | bp += *decpt; | |
997 | } | |
998 | if (value == 0) /* kludge for __dtoa irregularity */ | |
999 | rve = bp; | |
1000 | while (rve < bp) | |
1001 | *rve++ = '0'; | |
1002 | } | |
1003 | *length = rve - digits; | |
1004 | return (digits); | |
1005 | } | |
1006 | ||
1007 | static int | |
1008 | exponent(p0, exp, fmtch) | |
1009 | char *p0; | |
1010 | int exp, fmtch; | |
1011 | { | |
1012 | register char *p, *t; | |
6bdac416 | 1013 | char expbuf[40]; |
8a0efa53 CF |
1014 | |
1015 | p = p0; | |
1016 | *p++ = fmtch; | |
1017 | if (exp < 0) { | |
1018 | exp = -exp; | |
1019 | *p++ = '-'; | |
1020 | } | |
1021 | else | |
1022 | *p++ = '+'; | |
6bdac416 | 1023 | t = expbuf + 40; |
8a0efa53 CF |
1024 | if (exp > 9) { |
1025 | do { | |
1026 | *--t = to_char(exp % 10); | |
1027 | } while ((exp /= 10) > 9); | |
1028 | *--t = to_char(exp); | |
6bdac416 | 1029 | for (; t < expbuf + 40; *p++ = *t++); |
8a0efa53 CF |
1030 | } |
1031 | else { | |
1032 | *p++ = '0'; | |
1033 | *p++ = to_char(exp); | |
1034 | } | |
1035 | return (p - p0); | |
1036 | } | |
1037 | #endif /* FLOATING_POINT */ |