|
1 /* |
|
2 * FUNCTION |
|
3 * <<vprintf>>, <<vfprintf>>, <<vsprintf>>---format argument list |
|
4 * INDEX |
|
5 * vprintf |
|
6 * INDEX |
|
7 * vfprintf |
|
8 * INDEX |
|
9 * vsprintf |
|
10 * ANSI_SYNOPSIS |
|
11 * #include <stdio.h> |
|
12 * #include <stdarg.h> |
|
13 * int vprintf(const char *<[fmt]>, va_list <[list]>); |
|
14 * int vfprintf(FILE *<[fp]>, const char *<[fmt]>, va_list <[list]>); |
|
15 * int vsprintf(char *<[str]>, const char *<[fmt]>, va_list <[list]>); |
|
16 * int _vprintf_r(void *<[reent]>, const char *<[fmt]>, |
|
17 * va_list <[list]>); |
|
18 * int _vfprintf_r(void *<[reent]>, FILE *<[fp]>, const char *<[fmt]>, |
|
19 * va_list <[list]>); |
|
20 * int _vsprintf_r(void *<[reent]>, char *<[str]>, const char *<[fmt]>, |
|
21 * va_list <[list]>); |
|
22 * TRAD_SYNOPSIS |
|
23 * #include <stdio.h> |
|
24 * #include <varargs.h> |
|
25 * int vprintf( <[fmt]>, <[list]>) |
|
26 * char *<[fmt]>; |
|
27 * va_list <[list]>; |
|
28 * int vfprintf(<[fp]>, <[fmt]>, <[list]>) |
|
29 * FILE *<[fp]>; |
|
30 * char *<[fmt]>; |
|
31 * va_list <[list]>; |
|
32 * int vsprintf(<[str]>, <[fmt]>, <[list]>) |
|
33 * char *<[str]>; |
|
34 * char *<[fmt]>; |
|
35 * va_list <[list]>; |
|
36 * int _vprintf_r(<[reent]>, <[fmt]>, <[list]>) |
|
37 * char *<[reent]>; |
|
38 * char *<[fmt]>; |
|
39 * va_list <[list]>; |
|
40 * int _vfprintf_r(<[reent]>, <[fp]>, <[fmt]>, <[list]>) |
|
41 * char *<[reent]>; |
|
42 * FILE *<[fp]>; |
|
43 * char *<[fmt]>; |
|
44 * va_list <[list]>; |
|
45 * int _vsprintf_r(<[reent]>, <[str]>, <[fmt]>, <[list]>) |
|
46 * char *<[reent]>; |
|
47 * char *<[str]>; |
|
48 * char *<[fmt]>; |
|
49 * va_list <[list]>; |
|
50 * <<vprintf>>, <<vfprintf>>, and <<vsprintf>> are (respectively) |
|
51 * variants of <<printf>>, <<fprintf>>, and <<sprintf>>. They differ |
|
52 * only in allowing their caller to pass the variable argument list as a |
|
53 * <<va_list>> object (initialized by <<va_start>>) rather than directly |
|
54 * accepting a variable number of arguments. |
|
55 * RETURNS |
|
56 * The return values are consistent with the corresponding functions: |
|
57 * <<vsprintf>> returns the number of bytes in the output string, |
|
58 * save that the concluding <<NULL>> is not counted. |
|
59 * <<vprintf>> and <<vfprintf>> return the number of characters transmitted. |
|
60 * If an error occurs, <<vprintf>> and <<vfprintf>> return <<EOF>>. No |
|
61 * error returns occur for <<vsprintf>>. |
|
62 * PORTABILITY |
|
63 * ANSI C requires all three functions. |
|
64 * Supporting OS subroutines required: <<close>>, <<fstat>>, <<isatty>>, |
|
65 * <<lseek>>, <<read>>, <<sbrk>>, <<write>>. |
|
66 * |
|
67 * |
|
68 */ |
|
69 |
|
70 |
|
71 |
|
72 /*- |
|
73 * Copyright (c) 1990 The Regents of the University of California. |
|
74 * All rights reserved. |
|
75 * |
|
76 * This code is derived from software contributed to Berkeley by |
|
77 * Chris Torek. |
|
78 * |
|
79 * Redistribution and use in source and binary forms, with or without |
|
80 * modification, are permitted provided that the following conditions |
|
81 * are met: |
|
82 * 1. Redistributions of source code must retain the above copyright |
|
83 * notice, this list of conditions and the following disclaimer. |
|
84 * 2. Redistributions in binary form must reproduce the above copyright |
|
85 * notice, this list of conditions and the following disclaimer in the |
|
86 * documentation and/or other materials provided with the distribution. |
|
87 * 3. All advertising materials mentioning features or use of this software |
|
88 * must display the following acknowledgement: |
|
89 * This product includes software developed by the University of |
|
90 * California, Berkeley and its contributors. |
|
91 * 4. Neither the name of the University nor the names of its contributors |
|
92 * may be used to endorse or promote products derived from this software |
|
93 * without specific prior written permission. |
|
94 * |
|
95 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
|
96 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
|
97 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
|
98 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
|
99 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
|
100 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
|
101 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
|
102 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
|
103 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
|
104 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
|
105 * SUCH DAMAGE. |
|
106 */ |
|
107 |
|
108 /* |
|
109 * Actual printf innards. |
|
110 * |
|
111 * This code is large and complicated... |
|
112 */ |
|
113 |
|
114 #if 1 |
|
115 #define _NO_LONGLONG |
|
116 #endif |
|
117 |
|
118 #include <_ansi.h> |
|
119 #include <stdio_r.h> |
|
120 #include <stdlib_r.h> |
|
121 #include <string.h> |
|
122 #include <reent.h> |
|
123 |
|
124 #include <stdarg.h> |
|
125 |
|
126 #include "LOCAL.H" |
|
127 #include "FVWRITE.H" |
|
128 |
|
129 |
|
130 //cm |
|
131 #include <stdlib.h> |
|
132 |
|
133 |
|
134 /* |
|
135 * Flush out all the vectors defined by the given uio, |
|
136 * then reset it so that it can be reused. |
|
137 */ |
|
138 static int |
|
139 __sprint(FILE *fp,register struct __suio *uio) |
|
140 { |
|
141 register int err; |
|
142 |
|
143 if (uio->uio_resid == 0) { |
|
144 uio->uio_iovcnt = 0; |
|
145 return (0); |
|
146 } |
|
147 err = __sfvwrite(fp, uio); |
|
148 uio->uio_resid = 0; |
|
149 uio->uio_iovcnt = 0; |
|
150 return (err); |
|
151 } |
|
152 |
|
153 /* |
|
154 * Helper function for `fprintf to unbuffered unix file': creates a |
|
155 * temporary buffer. We only work on write-only files; this avoids |
|
156 * worries about ungetc buffers and so forth. |
|
157 */ |
|
158 static int |
|
159 __sbprintf(register FILE *fp,const char *fmt,va_list ap) |
|
160 { |
|
161 int ret; |
|
162 FILE fake; |
|
163 unsigned char buf[BUFSIZ]; |
|
164 |
|
165 /* copy the important variables */ |
|
166 fake._data = fp->_data; |
|
167 fake._flags = (short)(fp->_flags & ~__SNBF); |
|
168 fake._file = fp->_file; |
|
169 fake._cookie = fp->_cookie; |
|
170 fake._write = fp->_write; |
|
171 |
|
172 /* set up the buffer */ |
|
173 fake._bf._base = fake._p = buf; |
|
174 fake._bf._size = fake._w = sizeof(buf); |
|
175 fake._lbfsize = 0; /* not actually used, but Just In Case */ |
|
176 |
|
177 /* do the work, then copy any error status */ |
|
178 ret = vfprintf(&fake, fmt, ap); |
|
179 if (ret >= 0 && fflush(&fake)) |
|
180 ret = EOF; |
|
181 if (fake._flags & __SERR) |
|
182 fp->_flags |= __SERR; |
|
183 return (ret); |
|
184 } |
|
185 |
|
186 |
|
187 /* #include <locale.h> for decimal_point */ |
|
188 #include <math.h> |
|
189 #include "FLOATIO.H" |
|
190 |
|
191 #define BUF (MAXEXP+MAXFRACT+1) /* + decimal point */ |
|
192 #define DEFPREC 6 |
|
193 |
|
194 extern int e32cvt (char *buf, int buflen, double, int width, int prec, int flags, int fmt); |
|
195 |
|
196 |
|
197 /* |
|
198 * Macros for converting digits to letters and vice versa |
|
199 */ |
|
200 #define to_digit(c) ((c) - '0') |
|
201 #define is_digit(c) ((unsigned)to_digit(c) <= 9) |
|
202 #define to_char(n) ((n) + '0') |
|
203 |
|
204 /* |
|
205 * Flags used during conversion. |
|
206 */ |
|
207 #define ALT 0x001 /* alternate form */ |
|
208 #define HEXPREFIX 0x002 /* add 0x or 0X prefix */ |
|
209 #define LADJUST 0x004 /* left adjustment */ |
|
210 #define LONGDBL 0x008 /* long double; unimplemented */ |
|
211 #define LONGINT 0x010 /* long integer */ |
|
212 #define QUADINT 0x020 /* quad integer */ |
|
213 #define SHORTINT 0x040 /* short integer */ |
|
214 #define ZEROPAD 0x080 /* zero (as opposed to blank) pad */ |
|
215 #define FPT 0x100 /* Floating point number */ |
|
216 |
|
217 EXPORT_C int |
|
218 vfprintf (FILE * fp, const char *fmt0, va_list ap) |
|
219 { |
|
220 return _vfprintf_r (fp->_data, fp, fmt0, ap); |
|
221 } |
|
222 |
|
223 /** |
|
224 A reentrant version of vfprintf(). |
|
225 */ |
|
226 EXPORT_C int |
|
227 _vfprintf_r (struct _reent *data, FILE * fp, const char *fmt0, va_list ap) |
|
228 { |
|
229 register char *fmt; /* format string */ |
|
230 register int ch; /* character from fmt */ |
|
231 register int n, m; /* handy integers (short term usage) */ |
|
232 register char *cp; /* handy char pointer (short term usage) */ |
|
233 register struct __siov *iovp;/* for PRINT macro */ |
|
234 register int flags; /* flags as above */ |
|
235 int ret; /* return value accumulator */ |
|
236 int width; /* width from format (%8d), or 0 */ |
|
237 int prec; /* precision from format (%.3d), or -1 */ |
|
238 char sign; /* sign prefix (' ', '+', '-', or \0) */ |
|
239 wchar_t wc; |
|
240 #if 0 |
|
241 char *decimal_point = "."; /* localeconv()->decimal_point; */ |
|
242 #endif |
|
243 // char softsign; /* temporary negative sign for floats */ |
|
244 double _double; /* double precision arguments %[eEfgG] */ |
|
245 // int expt; /* integer value of exponent */ |
|
246 // int expsize; /* character count for expstr */ |
|
247 // int ndig; /* actual number of digits returned by cvt */ |
|
248 // char expstr[7]; /* buffer for exponent string */ |
|
249 |
|
250 #ifndef _NO_LONGLONG |
|
251 #define quad_t long long |
|
252 #define u_quad_t unsigned long long |
|
253 #endif |
|
254 |
|
255 #ifndef _NO_LONGLONG |
|
256 u_quad_t _uquad; /* integer arguments %[diouxX] */ |
|
257 #else |
|
258 u_long _uquad; |
|
259 #endif |
|
260 enum { OCT, DEC, HEX } base;/* base for [diouxX] conversion */ |
|
261 int dprec; /* a copy of prec if [diouxX], 0 otherwise */ |
|
262 int realsz; /* field size expanded by dprec */ |
|
263 int size; /* size of converted field or string */ |
|
264 char *xdigs = NULL; /* digits for [xX] conversion */ |
|
265 #define NIOV 8 |
|
266 struct __suio uio; /* output information: summary */ |
|
267 struct __siov iov[NIOV];/* ... and individual io vectors */ |
|
268 char buf[BUF]; /* space for %c, %[diouxX], %[eEfgG] */ |
|
269 char ox[2]; /* space for 0x hex-prefix */ |
|
270 |
|
271 /* |
|
272 * Choose PADSIZE to trade efficiency vs. size. If larger printf |
|
273 * fields occur frequently, increase PADSIZE and make the initialisers |
|
274 * below longer. |
|
275 */ |
|
276 #define PADSIZE 16 /* pad chunk size */ |
|
277 static const char blanks[PADSIZE] = |
|
278 {' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' '}; |
|
279 static const char zeroes[PADSIZE] = |
|
280 {'0','0','0','0','0','0','0','0','0','0','0','0','0','0','0','0'}; |
|
281 |
|
282 /* |
|
283 * BEWARE, these `goto error' on error, and PAD uses `n'. |
|
284 */ |
|
285 #define PRINT(ptr, len) { \ |
|
286 iovp->iov_base = (ptr); \ |
|
287 iovp->iov_len = (len); \ |
|
288 uio.uio_resid += (len); \ |
|
289 iovp++; \ |
|
290 if (++uio.uio_iovcnt >= NIOV) { \ |
|
291 if (__sprint(fp, &uio)) \ |
|
292 goto error; \ |
|
293 iovp = iov; \ |
|
294 } \ |
|
295 } |
|
296 #define PAD(howmany, with) { \ |
|
297 if ((n = (howmany)) > 0) { \ |
|
298 while (n > PADSIZE) { \ |
|
299 PRINT(with, PADSIZE); \ |
|
300 n -= PADSIZE; \ |
|
301 } \ |
|
302 PRINT(with, n); \ |
|
303 } \ |
|
304 } |
|
305 #define FLUSH() { \ |
|
306 if (uio.uio_resid && __sprint(fp, &uio)) \ |
|
307 goto error; \ |
|
308 uio.uio_iovcnt = 0; \ |
|
309 iovp = iov; \ |
|
310 } |
|
311 |
|
312 /* |
|
313 * To extend shorts properly, we need both signed and unsigned |
|
314 * argument extraction methods. |
|
315 */ |
|
316 #ifndef _NO_LONGLONG |
|
317 #define SARG() \ |
|
318 (flags&QUADINT ? va_arg(ap, quad_t) : \ |
|
319 flags&LONGINT ? va_arg(ap, long) : \ |
|
320 flags&SHORTINT ? (long)(short)va_arg(ap, int) : \ |
|
321 (long)va_arg(ap, int)) |
|
322 #define UARG() \ |
|
323 (flags&QUADINT ? va_arg(ap, u_quad_t) : \ |
|
324 flags&LONGINT ? va_arg(ap, u_long) : \ |
|
325 flags&SHORTINT ? (u_long)(u_short)va_arg(ap, int) : \ |
|
326 (u_long)va_arg(ap, u_int)) |
|
327 #else |
|
328 #define SARG() \ |
|
329 (flags&LONGINT ? va_arg(ap, long) : \ |
|
330 flags&SHORTINT ? (long)(short)va_arg(ap, int) : \ |
|
331 (long)va_arg(ap, int)) |
|
332 #define UARG() \ |
|
333 (flags&LONGINT ? va_arg(ap, u_long) : \ |
|
334 flags&SHORTINT ? (u_long)(u_short)va_arg(ap, int) : \ |
|
335 (u_long)va_arg(ap, u_int)) |
|
336 #endif |
|
337 |
|
338 CHECK_INIT (fp); |
|
339 |
|
340 /* sorry, fprintf(read_only_file, "") returns EOF, not 0 */ |
|
341 if (cantwrite(fp)) |
|
342 return (EOF); |
|
343 |
|
344 /* optimise fprintf(stderr) (and other unbuffered Unix files) */ |
|
345 if ((fp->_flags & (__SNBF|__SWR|__SRW)) == (__SNBF|__SWR) && |
|
346 fp->_file >= 0) |
|
347 return (__sbprintf(fp, fmt0, ap)); |
|
348 |
|
349 fmt = (char *)fmt0; |
|
350 uio.uio_iov = iovp = iov; |
|
351 uio.uio_resid = 0; |
|
352 uio.uio_iovcnt = 0; |
|
353 ret = 0; |
|
354 |
|
355 /* |
|
356 * Scan the format for conversions (`%' character). |
|
357 */ |
|
358 for (;;) { |
|
359 cp = fmt; |
|
360 while ((n = mbtowc(&wc, fmt, MB_CUR_MAX)) > 0) { |
|
361 fmt += n; |
|
362 if (wc == L'%') { |
|
363 fmt--; |
|
364 break; |
|
365 } |
|
366 } |
|
367 if ((m = fmt - cp) != 0) { |
|
368 PRINT(cp, m); |
|
369 ret += m; |
|
370 } |
|
371 if (n <= 0) |
|
372 goto done; |
|
373 fmt++; /* skip over '%' */ |
|
374 |
|
375 flags = 0; |
|
376 dprec = 0; |
|
377 width = 0; |
|
378 prec = -1; |
|
379 sign = '\0'; |
|
380 |
|
381 rflag: ch = *fmt++; |
|
382 reswitch: switch (ch) { |
|
383 case ' ': |
|
384 /* |
|
385 * ``If the space and + flags both appear, the space |
|
386 * flag will be ignored.'' |
|
387 * -- ANSI X3J11 |
|
388 */ |
|
389 if (!sign) |
|
390 sign = ' '; |
|
391 goto rflag; |
|
392 case '#': |
|
393 flags |= ALT; |
|
394 goto rflag; |
|
395 case '*': |
|
396 /* |
|
397 * ``A negative field width argument is taken as a |
|
398 * - flag followed by a positive field width.'' |
|
399 * -- ANSI X3J11 |
|
400 * They don't exclude field widths read from args. |
|
401 */ |
|
402 if ((width = va_arg(ap, int)) >= 0) |
|
403 goto rflag; |
|
404 width = -width; |
|
405 /* FALLTHROUGH */ |
|
406 case '-': |
|
407 flags |= LADJUST; |
|
408 goto rflag; |
|
409 case '+': |
|
410 sign = '+'; |
|
411 goto rflag; |
|
412 case '.': |
|
413 if ((ch = *fmt++) == '*') { |
|
414 n = va_arg(ap, int); |
|
415 prec = n < 0 ? -1 : n; |
|
416 goto rflag; |
|
417 } |
|
418 n = 0; |
|
419 while (is_digit(ch)) { |
|
420 n = 10 * n + to_digit(ch); |
|
421 ch = *fmt++; |
|
422 } |
|
423 prec = n < 0 ? -1 : n; |
|
424 goto reswitch; |
|
425 case '0': |
|
426 /* |
|
427 * ``Note that 0 is taken as a flag, not as the |
|
428 * beginning of a field width.'' |
|
429 * -- ANSI X3J11 |
|
430 */ |
|
431 flags |= ZEROPAD; |
|
432 goto rflag; |
|
433 case '1': case '2': case '3': case '4': |
|
434 case '5': case '6': case '7': case '8': case '9': |
|
435 n = 0; |
|
436 do { |
|
437 n = 10 * n + to_digit(ch); |
|
438 ch = *fmt++; |
|
439 } while (is_digit(ch)); |
|
440 width = n; |
|
441 goto reswitch; |
|
442 case 'L': |
|
443 flags |= LONGDBL; |
|
444 goto rflag; |
|
445 case 'h': |
|
446 flags |= SHORTINT; |
|
447 goto rflag; |
|
448 case 'l': |
|
449 if (*fmt == 'l') { |
|
450 fmt++; |
|
451 flags |= QUADINT; |
|
452 } else { |
|
453 flags |= LONGINT; |
|
454 } |
|
455 goto rflag; |
|
456 case 'q': |
|
457 flags |= QUADINT; |
|
458 goto rflag; |
|
459 case 'c': |
|
460 *(cp = buf) = (char)va_arg(ap, int); |
|
461 size = 1; |
|
462 sign = '\0'; |
|
463 break; |
|
464 case 'D': |
|
465 flags |= LONGINT; |
|
466 /*FALLTHROUGH*/ |
|
467 case 'd': |
|
468 case 'i': |
|
469 _uquad = SARG(); |
|
470 #ifndef _NO_LONGLONG |
|
471 if ((quad_t)_uquad < 0) |
|
472 #else |
|
473 if ((long) _uquad < 0) |
|
474 #endif |
|
475 { |
|
476 |
|
477 #ifndef _NO_LONGLONG |
|
478 _uquad = -_uquad; |
|
479 #else |
|
480 _uquad = (u_long)(-(long)_uquad); |
|
481 #endif |
|
482 sign = '-'; |
|
483 } |
|
484 base = DEC; |
|
485 goto number; |
|
486 |
|
487 case 'e': |
|
488 case 'E': |
|
489 case 'f': |
|
490 case 'g': |
|
491 case 'G': |
|
492 if (prec == -1) { |
|
493 prec = DEFPREC; |
|
494 } else if ((ch == 'g' || ch == 'G') && prec == 0) { |
|
495 prec = 1; |
|
496 } |
|
497 |
|
498 if (flags & LONGDBL) { |
|
499 _double = (double) va_arg(ap, long double); |
|
500 } else { |
|
501 _double = va_arg(ap, double); |
|
502 } |
|
503 |
|
504 /* do this before tricky precision changes */ |
|
505 if (isinf(_double)) { |
|
506 if (_double < 0) |
|
507 sign = '-'; |
|
508 cp = "Inf"; |
|
509 size = 3; |
|
510 break; |
|
511 } |
|
512 if (isnan(_double)) { |
|
513 cp = "NaN"; |
|
514 size = 3; |
|
515 break; |
|
516 } |
|
517 flags |= FPT; |
|
518 #if 0 |
|
519 cp = cvt(data, _double, prec, flags, &softsign, |
|
520 &expt, ch, &ndig); |
|
521 if (ch == 'g' || ch == 'G') { |
|
522 if (expt <= -4 || expt > prec) |
|
523 ch = (ch == 'g') ? 'e' : 'E'; |
|
524 else |
|
525 ch = 'g'; |
|
526 } |
|
527 if (ch <= 'e') { /* 'e' or 'E' fmt */ |
|
528 --expt; |
|
529 expsize = exponent(expstr, expt, ch); |
|
530 size = expsize + ndig; |
|
531 if (ndig > 1 || flags & ALT) |
|
532 ++size; |
|
533 } else if (ch == 'f') { /* f fmt */ |
|
534 if (expt > 0) { |
|
535 size = expt; |
|
536 if (prec || flags & ALT) |
|
537 size += prec + 1; |
|
538 } else /* "0.X" */ |
|
539 size = prec + 2; |
|
540 } else if (expt >= ndig) { /* fixed g fmt */ |
|
541 size = expt; |
|
542 if (flags & ALT) |
|
543 ++size; |
|
544 } else |
|
545 size = ndig + (expt > 0 ? |
|
546 1 : 2 - expt); |
|
547 |
|
548 if (softsign) |
|
549 sign = '-'; |
|
550 #else |
|
551 if (_double < 0) { |
|
552 _double = -_double; |
|
553 sign = '-'; |
|
554 } |
|
555 size = e32cvt(buf, BUF, _double, width, prec, flags, ch); |
|
556 cp=buf; |
|
557 #endif |
|
558 break; |
|
559 |
|
560 case 'n': |
|
561 #ifndef _NO_LONGLONG |
|
562 if (flags & QUADINT) |
|
563 *va_arg(ap, quad_t *) = ret; |
|
564 else |
|
565 #endif |
|
566 if (flags & LONGINT) |
|
567 *va_arg(ap, long *) = ret; |
|
568 else if (flags & SHORTINT) |
|
569 *va_arg(ap, short *) = (short)ret; |
|
570 else |
|
571 *va_arg(ap, int *) = ret; |
|
572 continue; /* no output */ |
|
573 case 'O': |
|
574 flags |= LONGINT; |
|
575 /*FALLTHROUGH*/ |
|
576 case 'o': |
|
577 _uquad = UARG(); |
|
578 base = OCT; |
|
579 goto nosign; |
|
580 case 'p': |
|
581 /* |
|
582 * ``The argument shall be a pointer to void. The |
|
583 * value of the pointer is converted to a sequence |
|
584 * of printable characters, in an implementation- |
|
585 * defined manner.'' |
|
586 * -- ANSI X3J11 |
|
587 */ |
|
588 /* NOSTRICT */ |
|
589 _uquad = (u_long)va_arg(ap, void *); |
|
590 base = HEX; |
|
591 xdigs = "0123456789abcdef"; |
|
592 flags |= HEXPREFIX; |
|
593 ch = 'x'; |
|
594 goto nosign; |
|
595 case 's': |
|
596 if ((cp = va_arg(ap, char *)) == NULL) |
|
597 cp = "(null)"; |
|
598 if (prec >= 0) { |
|
599 /* |
|
600 * can't use strlen; can only look for the |
|
601 * NUL in the first `prec' characters, and |
|
602 * strlen() will go further. |
|
603 */ |
|
604 char *p = (char *)memchr(cp, 0, prec); |
|
605 |
|
606 if (p != NULL) { |
|
607 size = p - cp; |
|
608 if (size > prec) |
|
609 size = prec; |
|
610 } else |
|
611 size = prec; |
|
612 } else |
|
613 size = strlen(cp); |
|
614 sign = '\0'; |
|
615 break; |
|
616 case 'U': |
|
617 flags |= LONGINT; |
|
618 /*FALLTHROUGH*/ |
|
619 case 'u': |
|
620 _uquad = UARG(); |
|
621 base = DEC; |
|
622 goto nosign; |
|
623 case 'X': |
|
624 xdigs = "0123456789ABCDEF"; |
|
625 goto hex; |
|
626 case 'x': |
|
627 xdigs = "0123456789abcdef"; |
|
628 hex: _uquad = UARG(); |
|
629 base = HEX; |
|
630 /* leading 0x/X only if non-zero */ |
|
631 if (flags & ALT && _uquad != 0) |
|
632 flags |= HEXPREFIX; |
|
633 |
|
634 /* unsigned conversions */ |
|
635 nosign: sign = '\0'; |
|
636 /* |
|
637 * ``... diouXx conversions ... if a precision is |
|
638 * specified, the 0 flag will be ignored.'' |
|
639 * -- ANSI X3J11 |
|
640 */ |
|
641 number: if ((dprec = prec) >= 0) |
|
642 flags &= ~ZEROPAD; |
|
643 |
|
644 /* |
|
645 * ``The result of converting a zero value with an |
|
646 * explicit precision of zero is no characters.'' |
|
647 * -- ANSI X3J11 |
|
648 */ |
|
649 cp = buf + BUF; |
|
650 if (_uquad != 0 || prec != 0) { |
|
651 /* |
|
652 * Unsigned mod is hard, and unsigned mod |
|
653 * by a constant is easier than that by |
|
654 * a variable; hence this switch. |
|
655 */ |
|
656 switch (base) { |
|
657 case OCT: |
|
658 do { |
|
659 *--cp = (char)to_char(_uquad & 7); |
|
660 _uquad >>= 3; |
|
661 } while (_uquad); |
|
662 /* handle octal leading 0 */ |
|
663 if (flags & ALT && *cp != '0') |
|
664 *--cp = '0'; |
|
665 break; |
|
666 |
|
667 case DEC: |
|
668 /* many numbers are 1 digit */ |
|
669 while (_uquad >= 10) { |
|
670 *--cp = (char)to_char(_uquad % 10); |
|
671 _uquad /= 10; |
|
672 } |
|
673 *--cp = (char)to_char(_uquad); |
|
674 break; |
|
675 |
|
676 case HEX: |
|
677 do { |
|
678 *--cp = xdigs[_uquad & 15]; |
|
679 _uquad >>= 4; |
|
680 } while (_uquad); |
|
681 break; |
|
682 |
|
683 default: |
|
684 cp = "bug in vfprintf: bad base"; |
|
685 size = strlen(cp); |
|
686 goto skipsize; |
|
687 } |
|
688 } |
|
689 /* Workaround GCC compiler bug: size = buf + BUF - cp */ |
|
690 { |
|
691 char *temp = buf+BUF; |
|
692 size = temp - cp; |
|
693 } |
|
694 skipsize: |
|
695 break; |
|
696 default: /* "%?" prints ?, unless ? is NUL */ |
|
697 if (ch == '\0') |
|
698 goto done; |
|
699 /* pretend it was %c with argument ch */ |
|
700 cp = buf; |
|
701 *cp = (char)ch; |
|
702 size = 1; |
|
703 sign = '\0'; |
|
704 break; |
|
705 } |
|
706 |
|
707 /* |
|
708 * All reasonable formats wind up here. At this point, `cp' |
|
709 * points to a string which (if not flags&LADJUST) should be |
|
710 * padded out to `width' places. If flags&ZEROPAD, it should |
|
711 * first be prefixed by any sign or other prefix; otherwise, |
|
712 * it should be blank padded before the prefix is emitted. |
|
713 * After any left-hand padding and prefixing, emit zeroes |
|
714 * required by a decimal [diouxX] precision, then print the |
|
715 * string proper, then emit zeroes required by any leftover |
|
716 * floating precision; finally, if LADJUST, pad with blanks. |
|
717 * |
|
718 * Compute actual size, so we know how much to pad. |
|
719 * size excludes decimal prec; realsz includes it. |
|
720 */ |
|
721 realsz = dprec > size ? dprec : size; |
|
722 if (sign) |
|
723 realsz++; |
|
724 else if (flags & HEXPREFIX) |
|
725 realsz+= 2; |
|
726 |
|
727 /* right-adjusting blank padding */ |
|
728 if ((flags & (LADJUST|ZEROPAD)) == 0) |
|
729 PAD(width - realsz, blanks); |
|
730 |
|
731 /* prefix */ |
|
732 if (sign) { |
|
733 PRINT(&sign, 1); |
|
734 } else if (flags & HEXPREFIX) { |
|
735 ox[0] = '0'; |
|
736 ox[1] = (char)ch; |
|
737 PRINT(ox, 2); |
|
738 } |
|
739 |
|
740 /* right-adjusting zero padding */ |
|
741 if ((flags & (LADJUST|ZEROPAD)) == ZEROPAD) |
|
742 PAD(width - realsz, zeroes); |
|
743 |
|
744 /* leading zeroes from decimal precision */ |
|
745 PAD(dprec - size, zeroes); |
|
746 |
|
747 /* the string or number proper */ |
|
748 PRINT(cp, size); |
|
749 #if 0 |
|
750 } else { /* glue together f_p fragments */ |
|
751 if (ch >= 'f') { /* 'f' or 'g' */ |
|
752 if (_double == 0) { |
|
753 /* kludge for __dtoa irregularity */ |
|
754 PRINT("0", 1); |
|
755 if (expt < ndig || (flags & ALT) != 0) { |
|
756 PRINT(decimal_point, 1); |
|
757 PAD(ndig - 1, zeroes); |
|
758 } |
|
759 } else if (expt <= 0) { |
|
760 PRINT("0", 1); |
|
761 PRINT(decimal_point, 1); |
|
762 PAD(-expt, zeroes); |
|
763 PRINT(cp, ndig); |
|
764 } else if (expt >= ndig) { |
|
765 PRINT(cp, ndig); |
|
766 PAD(expt - ndig, zeroes); |
|
767 if (flags & ALT) |
|
768 PRINT(".", 1); |
|
769 } else { |
|
770 PRINT(cp, expt); |
|
771 cp += expt; |
|
772 PRINT(".", 1); |
|
773 PRINT(cp, ndig-expt); |
|
774 } |
|
775 } else { /* 'e' or 'E' */ |
|
776 if (ndig > 1 || flags & ALT) { |
|
777 ox[0] = *cp++; |
|
778 ox[1] = '.'; |
|
779 PRINT(ox, 2); |
|
780 if (_double || (flags & ALT) == 0) { |
|
781 PRINT(cp, ndig-1); |
|
782 } else /* 0.[0..] */ |
|
783 /* __dtoa irregularity */ |
|
784 PAD(ndig - 1, zeroes); |
|
785 } else /* XeYYY */ |
|
786 PRINT(cp, 1); |
|
787 PRINT(expstr, expsize); |
|
788 } |
|
789 } |
|
790 #endif |
|
791 /* left-adjusting padding (always blank) */ |
|
792 if (flags & LADJUST) |
|
793 PAD(width - realsz, blanks); |
|
794 |
|
795 /* finally, adjust ret */ |
|
796 ret += width > realsz ? width : realsz; |
|
797 |
|
798 FLUSH(); /* copy out the I/O vectors */ |
|
799 } |
|
800 done: |
|
801 FLUSH(); |
|
802 error: |
|
803 return (__sferror(fp) ? EOF : ret); |
|
804 /* NOTREACHED */ |
|
805 } |
|
806 |
|
807 #if 0 |
|
808 static char * |
|
809 cvt(struct _reent *data,double value,int ndigits, int flags, char *sign, int *decpt, int ch, int *length) |
|
810 { |
|
811 int mode, dsgn; |
|
812 char *digits, *bp, *rve; |
|
813 |
|
814 if (ch == 'f') { |
|
815 mode = 3; /* ndigits after the decimal point */ |
|
816 } else { |
|
817 /* To obtain ndigits after the decimal point for the 'e' |
|
818 * and 'E' formats, round to ndigits + 1 significant |
|
819 * figures. |
|
820 */ |
|
821 if (ch == 'e' || ch == 'E') { |
|
822 ndigits++; |
|
823 } |
|
824 mode = 2; /* ndigits significant digits */ |
|
825 } |
|
826 |
|
827 if (value < 0) { |
|
828 value = -value; |
|
829 *sign = '-'; |
|
830 } else |
|
831 *sign = '\000'; |
|
832 digits = _dtoa_r(data, value, mode, ndigits, decpt, &dsgn, &rve); |
|
833 if ((ch != 'g' && ch != 'G') || flags & ALT) { /* Print trailing zeros */ |
|
834 bp = digits + ndigits; |
|
835 if (ch == 'f') { |
|
836 if (*digits == '0' && value) |
|
837 *decpt = -ndigits + 1; |
|
838 bp += *decpt; |
|
839 } |
|
840 if (value == 0) /* kludge for __dtoa irregularity */ |
|
841 rve = bp; |
|
842 while (rve < bp) |
|
843 *rve++ = '0'; |
|
844 } |
|
845 *length = rve - digits; |
|
846 return (digits); |
|
847 } |
|
848 |
|
849 static int |
|
850 exponent(char *p0, int exp, int fmtch) |
|
851 { |
|
852 register char *p, *t; |
|
853 char expbuf[MAXEXP]; |
|
854 |
|
855 p = p0; |
|
856 *p++ = (char)fmtch; |
|
857 if (exp < 0) { |
|
858 exp = -exp; |
|
859 *p++ = '-'; |
|
860 } |
|
861 else |
|
862 *p++ = '+'; |
|
863 t = expbuf + MAXEXP; |
|
864 if (exp > 9) { |
|
865 do { |
|
866 *--t = (char)to_char(exp % 10); |
|
867 } while ((exp /= 10) > 9); |
|
868 *--t = (char)to_char(exp); |
|
869 for (; t < expbuf + MAXEXP; *p++ = *t++); |
|
870 } |
|
871 else { |
|
872 *p++ = '0'; |
|
873 *p++ = (char)to_char(exp); |
|
874 } |
|
875 return (p - p0); |
|
876 } |
|
877 #endif |