Ruby  2.7.1p83(2020-03-31revisiona0c7c23c9cec0d0ffcba012279cd652d28ad5bf3)
vsnprintf.c
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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. Neither the name of the University nor the names of its contributors
17  * may be used to endorse or promote products derived from this software
18  * without specific prior written permission.
19  *
20  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23  * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30  * SUCH DAMAGE.
31  */
32 
33 /*
34  * IMPORTANT NOTE:
35  * --------------
36  * From ftp://ftp.cs.berkeley.edu/pub/4bsd/README.Impt.License.Change
37  * paragraph 3 above is now null and void.
38  */
39 
40 /* SNPRINTF.C
41  * fjc 7-31-97 Modified by Mib Software to be a standalone snprintf.c module.
42  * http://www.mibsoftware.com
43  * Mib Software does not warrant this software any differently than the
44  * University of California, Berkeley as described above. All warranties
45  * are disclaimed. Use this software at your own risk.
46  *
47  * All code referencing FILE * functions was eliminated, since it could
48  * never be called. All header files and necessary files are collapsed
49  * into one file, internal functions are declared static. This should
50  * allow inclusion into libraries with less chance of namespace collisions.
51  *
52  * snprintf should be the only externally visible item.
53  *
54  * As of 7-31-97 FLOATING_POINT is NOT provided. The code is somewhat
55  * non-portable, so it is disabled.
56  */
57 
58 /* Define FLOATING_POINT to get floating point. */
59 /*
60 #define FLOATING_POINT
61 */
62 
63 #include <sys/types.h>
64 #define u_long unsigned long
65 #define u_short unsigned short
66 #define u_int unsigned int
67 
68 #if !defined(HAVE_STDARG_PROTOTYPES)
69 #if defined(__STDC__)
70 #define HAVE_STDARG_PROTOTYPES 1
71 #endif
72 #endif
73 
74 #undef __P
75 #if defined(HAVE_STDARG_PROTOTYPES)
76 # include <stdarg.h>
77 # if !defined(__P)
78 # define __P(x) x
79 # endif
80 #else
81 # define __P(x) ()
82 # if !defined(const)
83 # define const
84 # endif
85 # include <varargs.h>
86 #endif
87 #ifndef _BSD_VA_LIST_
88 #define _BSD_VA_LIST_ va_list
89 #endif
90 
91 #ifdef __STDC__
92 # include <limits.h>
93 #else
94 # ifndef LONG_MAX
95 # ifdef HAVE_LIMITS_H
96 # include <limits.h>
97 # else
98  /* assuming 32bit(2's complement) long */
99 # define LONG_MAX 2147483647
100 # endif
101 # endif
102 #endif
103 
104 #if defined(__hpux) && !defined(__GNUC__) && !defined(__STDC__)
105 #define const
106 #endif
107 
108 #if defined(sgi)
109 #undef __const
110 #define __const
111 #endif /* People who don't like const sys_error */
112 
113 #include <stddef.h>
114 #if defined(__hpux) && !defined(__GNUC__) || defined(__DECC)
115 #include <string.h>
116 #endif
117 
118 #if !defined(__CYGWIN32__) && defined(__hpux) && !defined(__GNUC__)
119 #include <stdlib.h>
120 #endif
121 
122 #ifndef NULL
123 #define NULL 0
124 #endif
125 
126 #if SIZEOF_LONG > SIZEOF_INT
127 # include <errno.h>
128 #endif
129 
130 /*
131  * NB: to fit things in six character monocase externals, the stdio
132  * code uses the prefix `__s' for stdio objects, typically followed
133  * by a three-character attempt at a mnemonic.
134  */
135 
136 /* stdio buffers */
137 struct __sbuf {
138  unsigned char *_base;
139  size_t _size;
140 };
141 
142 
143 /*
144  * stdio state variables.
145  *
146  * The following always hold:
147  *
148  * if (_flags&(__SLBF|__SWR)) == (__SLBF|__SWR),
149  * _lbfsize is -_bf._size, else _lbfsize is 0
150  * if _flags&__SRD, _w is 0
151  * if _flags&__SWR, _r is 0
152  *
153  * This ensures that the getc and putc macros (or inline functions) never
154  * try to write or read from a file that is in `read' or `write' mode.
155  * (Moreover, they can, and do, automatically switch from read mode to
156  * write mode, and back, on "r+" and "w+" files.)
157  *
158  * _lbfsize is used only to make the inline line-buffered output stream
159  * code as compact as possible.
160  *
161  * _ub, _up, and _ur are used when ungetc() pushes back more characters
162  * than fit in the current _bf, or when ungetc() pushes back a character
163  * that does not match the previous one in _bf. When this happens,
164  * _ub._base becomes non-nil (i.e., a stream has ungetc() data iff
165  * _ub._base!=NULL) and _up and _ur save the current values of _p and _r.
166  *
167  * NB: see WARNING above before changing the layout of this structure!
168  */
169 typedef struct __sFILE {
170  unsigned char *_p; /* current position in (some) buffer */
171 #if 0
172  size_t _r; /* read space left for getc() */
173 #endif
174  size_t _w; /* write space left for putc() */
175  short _flags; /* flags, below; this FILE is free if 0 */
176  short _file; /* fileno, if Unix descriptor, else -1 */
177  struct __sbuf _bf; /* the buffer (at least 1 byte, if !NULL) */
178 #if 0
179  size_t _lbfsize; /* 0 or -_bf._size, for inline putc */
180 #endif
181  int (*vwrite)(/* struct __sFILE*, struct __suio * */);
182  const char *(*vextra)(/* struct __sFILE*, size_t, void*, long*, int */);
183 } FILE;
184 
185 
186 #define __SLBF 0x0001 /* line buffered */
187 #define __SNBF 0x0002 /* unbuffered */
188 #define __SRD 0x0004 /* OK to read */
189 #define __SWR 0x0008 /* OK to write */
190  /* RD and WR are never simultaneously asserted */
191 #define __SRW 0x0010 /* open for reading & writing */
192 #define __SEOF 0x0020 /* found EOF */
193 #define __SERR 0x0040 /* found error */
194 #define __SMBF 0x0080 /* _buf is from malloc */
195 #define __SAPP 0x0100 /* fdopen()ed in append mode */
196 #define __SSTR 0x0200 /* this is an sprintf/snprintf string */
197 #define __SOPT 0x0400 /* do fseek() optimisation */
198 #define __SNPT 0x0800 /* do not do fseek() optimisation */
199 #define __SOFF 0x1000 /* set iff _offset is in fact correct */
200 #define __SMOD 0x2000 /* true => fgetln modified _p text */
201 
202 
203 #define EOF (-1)
204 
205 
206 #define BSD__sfeof(p) (((p)->_flags & __SEOF) != 0)
207 #define BSD__sferror(p) (((p)->_flags & __SERR) != 0)
208 #define BSD__sclearerr(p) ((void)((p)->_flags &= ~(__SERR|__SEOF)))
209 #define BSD__sfileno(p) ((p)->_file)
210 
211 #undef feof
212 #undef ferror
213 #undef clearerr
214 #define feof(p) BSD__sfeof(p)
215 #define ferror(p) BSD__sferror(p)
216 #define clearerr(p) BSD__sclearerr(p)
217 
218 #ifndef _ANSI_SOURCE
219 #define fileno(p) BSD__sfileno(p)
220 #endif
221 
222 
223 /*
224  * I/O descriptors for __sfvwrite().
225  */
226 struct __siov {
227  const void *iov_base;
228  size_t iov_len;
229 };
230 struct __suio {
231  struct __siov *uio_iov;
233  size_t uio_resid;
234 };
235 
236 /*
237  * Write some memory regions. Return zero on success, EOF on error.
238  *
239  * This routine is large and unsightly, but most of the ugliness due
240  * to the three different kinds of output buffering is handled here.
241  */
242 static int
243 BSD__sfvwrite(register FILE *fp, register struct __suio *uio)
244 {
245  register size_t len;
246  register const char *p;
247  register struct __siov *iov;
248  register size_t w;
249 
250  if ((len = uio->uio_resid) == 0)
251  return (0);
252 #ifndef __hpux
253 #define MIN(a, b) ((a) < (b) ? (a) : (b))
254 #endif
255 #define COPY(n) (void)memcpy((void *)fp->_p, (void *)p, (size_t)(n))
256 
257  iov = uio->uio_iov;
258  p = iov->iov_base;
259  len = iov->iov_len;
260  iov++;
261 #define GETIOV(extra_work) \
262  while (len == 0) { \
263  extra_work; \
264  p = iov->iov_base; \
265  len = iov->iov_len; \
266  iov++; \
267  }
268  if (fp->_flags & __SNBF) {
269  /* fjc 7-31-97 Will never happen. We are working with
270  strings only
271  */
272  } else if ((fp->_flags & __SLBF) == 0) {
273  /*
274  * Fully buffered: fill partially full buffer, if any,
275  * and then flush. If there is no partial buffer, write
276  * one _bf._size byte chunk directly (without copying).
277  *
278  * String output is a special case: write as many bytes
279  * as fit, but pretend we wrote everything. This makes
280  * snprintf() return the number of bytes needed, rather
281  * than the number used, and avoids its write function
282  * (so that the write function can be invalid).
283  */
284  do {
285  GETIOV(;);
286  w = fp->_w;
287  if (fp->_flags & __SSTR) {
288  if (len < w)
289  w = len;
290  COPY(w); /* copy MIN(fp->_w,len), */
291  fp->_w -= w;
292  fp->_p += w;
293  w = len; /* but pretend copied all */
294  } else {
295  /* fjc 7-31-97 Will never happen. We are working with
296  strings only
297  */
298  }
299  p += w;
300  len -= w;
301  } while ((uio->uio_resid -= w) != 0);
302  } else {
303  /* fjc 7-31-97 Will never happen. We are working with
304  strings only
305  */
306  }
307  return (0);
308 }
309 
310 /*
311  * Actual printf innards.
312  *
313  * This code is large and complicated...
314  */
315 
316 /*
317  * Flush out all the vectors defined by the given uio,
318  * then reset it so that it can be reused.
319  */
320 static int
321 BSD__sprint(FILE *fp, register struct __suio *uio)
322 {
323  register int err;
324 
325  if (uio->uio_resid == 0) {
326  uio->uio_iovcnt = 0;
327  return (0);
328  }
329  err = (*fp->vwrite)(fp, uio);
330  uio->uio_resid = 0;
331  uio->uio_iovcnt = 0;
332  return (err);
333 }
334 
335 
336 /*
337  * Helper function for `fprintf to unbuffered unix file': creates a
338  * temporary buffer. We only work on write-only files; this avoids
339  * worries about ungetc buffers and so forth.
340  */
341 static int
342 BSD__sbprintf(register FILE *fp, const char *fmt, va_list ap)
343 {
344 /* We don't support files. */
345  return 0;
346 }
347 
348 
349 /*
350  * Macros for converting digits to letters and vice versa
351  */
352 #define to_digit(c) ((c) - '0')
353 #define is_digit(c) ((unsigned)to_digit(c) <= 9)
354 #define to_char(n) (char)((n) + '0')
355 
356 #ifdef _HAVE_SANE_QUAD_
357 /*
358  * Convert an unsigned long long to ASCII for printf purposes, returning
359  * a pointer to the first character of the string representation.
360  * Octal numbers can be forced to have a leading zero; hex numbers
361  * use the given digits.
362  */
363 static char *
364 BSD__uqtoa(register u_quad_t val, char *endp, int base, int octzero, const char *xdigs)
365 {
366  register char *cp = endp;
367  register quad_t sval;
368 
369  /*
370  * Handle the three cases separately, in the hope of getting
371  * better/faster code.
372  */
373  switch (base) {
374  case 10:
375  if (val < 10) { /* many numbers are 1 digit */
376  *--cp = to_char(val);
377  return (cp);
378  }
379  /*
380  * On many machines, unsigned arithmetic is harder than
381  * signed arithmetic, so we do at most one unsigned mod and
382  * divide; this is sufficient to reduce the range of
383  * the incoming value to where signed arithmetic works.
384  */
385  if (val > LLONG_MAX) {
386  *--cp = to_char(val % 10);
387  sval = val / 10;
388  } else
389  sval = val;
390  do {
391  *--cp = to_char(sval % 10);
392  sval /= 10;
393  } while (sval != 0);
394  break;
395 
396  case 8:
397  do {
398  *--cp = to_char(val & 7);
399  val >>= 3;
400  } while (val);
401  if (octzero && *cp != '0')
402  *--cp = '0';
403  break;
404 
405  case 16:
406  do {
407  *--cp = xdigs[val & 15];
408  val >>= 4;
409  } while (val);
410  break;
411 
412  default: /* oops */
413  /*
414  abort();
415  */
416  break; /* fjc 7-31-97. Don't reference abort() here */
417  }
418  return (cp);
419 }
420 #endif /* _HAVE_SANE_QUAD_ */
421 
422 /*
423  * Convert an unsigned long to ASCII for printf purposes, returning
424  * a pointer to the first character of the string representation.
425  * Octal numbers can be forced to have a leading zero; hex numbers
426  * use the given digits.
427  */
428 static char *
429 BSD__ultoa(register u_long val, char *endp, int base, int octzero, const char *xdigs)
430 {
431  register char *cp = endp;
432  register long sval;
433 
434  /*
435  * Handle the three cases separately, in the hope of getting
436  * better/faster code.
437  */
438  switch (base) {
439  case 10:
440  if (val < 10) { /* many numbers are 1 digit */
441  *--cp = to_char(val);
442  return (cp);
443  }
444  /*
445  * On many machines, unsigned arithmetic is harder than
446  * signed arithmetic, so we do at most one unsigned mod and
447  * divide; this is sufficient to reduce the range of
448  * the incoming value to where signed arithmetic works.
449  */
450  if (val > LONG_MAX) {
451  *--cp = to_char(val % 10);
452  sval = val / 10;
453  } else
454  sval = val;
455  do {
456  *--cp = to_char(sval % 10);
457  sval /= 10;
458  } while (sval != 0);
459  break;
460 
461  case 8:
462  do {
463  *--cp = to_char(val & 7);
464  val >>= 3;
465  } while (val);
466  if (octzero && *cp != '0')
467  *--cp = '0';
468  break;
469 
470  case 16:
471  do {
472  *--cp = xdigs[val & 15];
473  val >>= 4;
474  } while (val);
475  break;
476 
477  default: /* oops */
478  /*
479  abort();
480  */
481  break; /* fjc 7-31-97. Don't reference abort() here */
482  }
483  return (cp);
484 }
485 
486 #ifdef FLOATING_POINT
487 #include <math.h>
488 #include <float.h>
489 /* #include "floatio.h" */
490 
491 #ifndef MAXEXP
492 # if DBL_MAX_10_EXP > -DBL_MIN_10_EXP
493 # define MAXEXP (DBL_MAX_10_EXP)
494 # else
495 # define MAXEXP (-DBL_MIN_10_EXP)
496 # endif
497 #endif
498 
499 #ifndef MAXFRACT
500 # define MAXFRACT (MAXEXP*10/3)
501 #endif
502 
503 #define BUF (MAXEXP+MAXFRACT+1) /* + decimal point */
504 #define DEFPREC 6
505 
506 static char *cvt(double, int, int, char *, int *, int, int *, char *);
507 static int exponent(char *, int, int);
508 
509 #else /* no FLOATING_POINT */
510 
511 #define BUF 68
512 
513 #endif /* FLOATING_POINT */
514 
515 #ifndef lower_hexdigits
516 # define lower_hexdigits "0123456789abcdef"
517 #endif
518 #ifndef upper_hexdigits
519 # define upper_hexdigits "0123456789ABCDEF"
520 #endif
521 
522 /*
523  * Flags used during conversion.
524  */
525 #define ALT 0x001 /* alternate form */
526 #define HEXPREFIX 0x002 /* add 0x or 0X prefix */
527 #define LADJUST 0x004 /* left adjustment */
528 #define LONGDBL 0x008 /* long double; unimplemented */
529 #define LONGINT 0x010 /* long integer */
530 
531 #ifdef _HAVE_SANE_QUAD_
532 #define QUADINT 0x020 /* quad integer */
533 #endif /* _HAVE_SANE_QUAD_ */
534 
535 #define SHORTINT 0x040 /* short integer */
536 #define ZEROPAD 0x080 /* zero (as opposed to blank) pad */
537 #define FPT 0x100 /* Floating point number */
538 ATTRIBUTE_NO_ADDRESS_SAFETY_ANALYSIS(static ssize_t BSD_vfprintf(FILE *fp, const char *fmt0, va_list ap));
539 static ssize_t
540 BSD_vfprintf(FILE *fp, const char *fmt0, va_list ap)
541 {
542 #ifdef PRI_EXTRA_MARK
544 #endif
545  register const char *fmt; /* format string */
546  register int ch; /* character from fmt */
547  register int n; /* handy integer (short term usage) */
548  register const char *cp;/* handy char pointer (short term usage) */
549  register struct __siov *iovp;/* for PRINT macro */
550  register int flags; /* flags as above */
551  ssize_t ret; /* return value accumulator */
552  int width; /* width from format (%8d), or 0 */
553  int prec; /* precision from format (%.3d), or -1 */
554  char sign; /* sign prefix (' ', '+', '-', or \0) */
555 #ifdef FLOATING_POINT
556  char softsign; /* temporary negative sign for floats */
557  double _double = 0; /* double precision arguments %[eEfgG] */
558  int expt; /* integer value of exponent */
559  int expsize = 0; /* character count for expstr */
560  int ndig = 0; /* actual number of digits returned by cvt */
561  int fprec = 0; /* floating point precision */
562  char expstr[7]; /* buffer for exponent string */
563 #endif
564  u_long MAYBE_UNUSED(ulval); /* integer arguments %[diouxX] */
565 #ifdef _HAVE_SANE_QUAD_
566  u_quad_t MAYBE_UNUSED(uqval); /* %q integers */
567 #endif /* _HAVE_SANE_QUAD_ */
568  int base; /* base for [diouxX] conversion */
569  int dprec; /* a copy of prec if [diouxX], 0 otherwise */
570  long fieldsz; /* field size expanded by sign, etc */
571  long realsz; /* field size expanded by dprec */
572  int size; /* size of converted field or string */
573  const char *xdigs = 0; /* digits for [xX] conversion */
574 #define NIOV 8
575  struct __suio uio; /* output information: summary */
576  struct __siov iov[NIOV];/* ... and individual io vectors */
577  char buf[BUF]; /* space for %c, %[diouxX], %[eEfgG] */
578  char ox[4]; /* space for 0x hex-prefix, hexadecimal's 1. */
579  char *const ebuf = buf + sizeof(buf);
580 #if SIZEOF_LONG > SIZEOF_INT
581  long ln;
582 #endif
583 
584  /*
585  * Choose PADSIZE to trade efficiency vs. size. If larger printf
586  * fields occur frequently, increase PADSIZE and make the initializers
587  * below longer.
588  */
589 #define PADSIZE 16 /* pad chunk size */
590  static const char blanks[PADSIZE] =
591  {' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' '};
592  static const char zeroes[PADSIZE] =
593  {'0','0','0','0','0','0','0','0','0','0','0','0','0','0','0','0'};
594 
595  /*
596  * BEWARE, these `goto error' on error, and PAD uses `n'.
597  */
598 #define PRINT(ptr, len) { \
599  iovp->iov_base = (ptr); \
600  iovp->iov_len = (len); \
601  uio.uio_resid += (len); \
602  iovp++; \
603  if (++uio.uio_iovcnt >= NIOV) { \
604  if (BSD__sprint(fp, &uio)) \
605  goto error; \
606  iovp = iov; \
607  } \
608 }
609 #define PAD(howmany, with) { \
610  if ((n = (howmany)) > 0) { \
611  while (n > PADSIZE) { \
612  PRINT((with), PADSIZE); \
613  n -= PADSIZE; \
614  } \
615  PRINT((with), n); \
616  } \
617 }
618 #if SIZEOF_LONG > SIZEOF_INT
619  /* abandon if too larger padding */
620 #define PAD_L(howmany, with) { \
621  ln = (howmany); \
622  if ((long)((int)ln) != ln) { \
623  errno = ENOMEM; \
624  goto error; \
625  } \
626  if (ln > 0) PAD((int)ln, (with)); \
627 }
628 #else
629 #define PAD_L(howmany, with) PAD((howmany), (with))
630 #endif
631 #define FLUSH() { \
632  if (uio.uio_resid && BSD__sprint(fp, &uio)) \
633  goto error; \
634  uio.uio_iovcnt = 0; \
635  iovp = iov; \
636 }
637 
638  /*
639  * To extend shorts properly, we need both signed and unsigned
640  * argument extraction methods.
641  */
642 #define SARG() \
643  (flags&LONGINT ? va_arg(ap, long) : \
644  flags&SHORTINT ? (long)(short)va_arg(ap, int) : \
645  (long)va_arg(ap, int))
646 #define UARG() \
647  (flags&LONGINT ? va_arg(ap, u_long) : \
648  flags&SHORTINT ? (u_long)(u_short)va_arg(ap, int) : \
649  (u_long)va_arg(ap, u_int))
650 
651  /* optimize fprintf(stderr) (and other unbuffered Unix files) */
652  if ((fp->_flags & (__SNBF|__SWR|__SRW)) == (__SNBF|__SWR) &&
653  fp->_file >= 0)
654  return (BSD__sbprintf(fp, fmt0, ap));
655 
656  fmt = fmt0;
657  uio.uio_iov = iovp = iov;
658  uio.uio_resid = 0;
659  uio.uio_iovcnt = 0;
660  ret = 0;
661  xdigs = 0;
662 
663  /*
664  * Scan the format for conversions (`%' character).
665  */
666  for (;;) {
667  size_t nc;
668  for (cp = fmt; (ch = *fmt) != '\0' && ch != '%'; fmt++)
669  /* void */;
670  if ((nc = fmt - cp) != 0) {
671  PRINT(cp, nc);
672  ret += nc;
673  }
674  if (ch == '\0')
675  goto done;
676  fmt++; /* skip over '%' */
677 
678  flags = 0;
679  dprec = 0;
680  width = 0;
681  prec = -1;
682  sign = '\0';
683 
684 rflag: ch = *fmt++;
685 reswitch: switch (ch) {
686  case ' ':
687  /*
688  * ``If the space and + flags both appear, the space
689  * flag will be ignored.''
690  * -- ANSI X3J11
691  */
692  if (!sign)
693  sign = ' ';
694  goto rflag;
695  case '#':
696  flags |= ALT;
697  goto rflag;
698  case '*':
699  /*
700  * ``A negative field width argument is taken as a
701  * - flag followed by a positive field width.''
702  * -- ANSI X3J11
703  * They don't exclude field widths read from args.
704  */
705  if ((width = va_arg(ap, int)) >= 0)
706  goto rflag;
707  width = -width;
708  /* FALLTHROUGH */
709  case '-':
710  flags |= LADJUST;
711  goto rflag;
712  case '+':
713  sign = '+';
714  goto rflag;
715  case '.':
716  if ((ch = *fmt++) == '*') {
717  n = va_arg(ap, int);
718  prec = n < 0 ? -1 : n;
719  goto rflag;
720  }
721  n = 0;
722  while (is_digit(ch)) {
723  n = 10 * n + to_digit(ch);
724  ch = *fmt++;
725  }
726  prec = n < 0 ? -1 : n;
727  goto reswitch;
728  case '0':
729  /*
730  * ``Note that 0 is taken as a flag, not as the
731  * beginning of a field width.''
732  * -- ANSI X3J11
733  */
734  flags |= ZEROPAD;
735  goto rflag;
736  case '1': case '2': case '3': case '4':
737  case '5': case '6': case '7': case '8': case '9':
738  n = 0;
739  do {
740  n = 10 * n + to_digit(ch);
741  ch = *fmt++;
742  } while (is_digit(ch));
743  width = n;
744  goto reswitch;
745 #ifdef FLOATING_POINT
746  case 'L':
747  flags |= LONGDBL;
748  goto rflag;
749 #endif
750  case 'h':
751  flags |= SHORTINT;
752  goto rflag;
753 #if SIZEOF_PTRDIFF_T == SIZEOF_LONG
754  case 't':
755 #endif
756 #if SIZEOF_SIZE_T == SIZEOF_LONG
757  case 'z':
758 #endif
759  case 'l':
760 #ifdef _HAVE_SANE_QUAD_
761  if (*fmt == 'l') {
762  fmt++;
763  flags |= QUADINT;
764  } else {
765  flags |= LONGINT;
766  }
767 #else
768  flags |= LONGINT;
769 #endif
770  goto rflag;
771 #ifdef _HAVE_SANE_QUAD_
772 #if SIZEOF_PTRDIFF_T == SIZEOF_LONG_LONG
773  case 't':
774 #endif
775 #if SIZEOF_SIZE_T == SIZEOF_LONG_LONG
776  case 'z':
777 #endif
778  case 'q':
779  flags |= QUADINT;
780  goto rflag;
781 #endif /* _HAVE_SANE_QUAD_ */
782 #ifdef _WIN32
783  case 'I':
784  if (*fmt == '3' && *(fmt + 1) == '2') {
785  fmt += 2;
786  flags |= LONGINT;
787  }
788 #ifdef _HAVE_SANE_QUAD_
789  else if (*fmt == '6' && *(fmt + 1) == '4') {
790  fmt += 2;
791  flags |= QUADINT;
792  }
793 #endif
794  else
795 #if defined(_HAVE_SANE_QUAD_) && SIZEOF_SIZE_T == SIZEOF_LONG_LONG
796  flags |= QUADINT;
797 #else
798  flags |= LONGINT;
799 #endif
800  goto rflag;
801 #endif
802  case 'c':
803  cp = buf;
804  *buf = (char)va_arg(ap, int);
805  size = 1;
806  sign = '\0';
807  break;
808  case 'i':
809 #ifdef _HAVE_SANE_QUAD_
810 # define INTPTR_MASK (QUADINT|LONGINT|SHORTINT)
811 #else
812 # define INTPTR_MASK (LONGINT|SHORTINT)
813 #endif
814 #if defined _HAVE_SANE_QUAD_ && SIZEOF_VOIDP == SIZEOF_LONG_LONG
815 # define INTPTR_FLAG QUADINT
816 #elif SIZEOF_VOIDP == SIZEOF_LONG
817 # define INTPTR_FLAG LONGINT
818 #else
819 # define INTPTR_FLAG 0
820 #endif
821 #ifdef PRI_EXTRA_MARK
822 # define IS_PRI_EXTRA_MARK(s) \
823  (PRI_EXTRA_MARK_LEN < 1 || \
824  (*(s) == PRI_EXTRA_MARK[0] && \
825  (PRI_EXTRA_MARK_LEN == 1 || \
826  strncmp((s)+1, &PRI_EXTRA_MARK[1], \
827  PRI_EXTRA_MARK_LEN-1) == 0)))
828 #else
829 # define PRI_EXTRA_MARK_LEN 0
830 # define IS_PRI_EXTRA_MARK(s) 1
831 #endif
832  if (fp->vextra && (flags & INTPTR_MASK) == INTPTR_FLAG &&
835  FLUSH();
836 #if defined _HAVE_SANE_QUAD_ && SIZEOF_VOIDP == SIZEOF_LONG_LONG
837  uqval = va_arg(ap, u_quad_t);
838  cp = (*fp->vextra)(fp, sizeof(uqval), &uqval, &fieldsz, sign);
839 #else
840  ulval = va_arg(ap, u_long);
841  cp = (*fp->vextra)(fp, sizeof(ulval), &ulval, &fieldsz, sign);
842 #endif
843  sign = '\0';
844  if (!cp) goto error;
845  if (prec < 0) goto long_len;
846  size = fieldsz < prec ? (int)fieldsz : prec;
847  break;
848  }
849  goto decimal;
850  case 'D':
851  flags |= LONGINT;
852  /*FALLTHROUGH*/
853  case 'd':
854  decimal:
855 #ifdef _HAVE_SANE_QUAD_
856  if (flags & QUADINT) {
857  uqval = va_arg(ap, quad_t);
858  if ((quad_t)uqval < 0) {
859  uqval = -(quad_t)uqval;
860  sign = '-';
861  }
862  } else
863 #endif /* _HAVE_SANE_QUAD_ */
864  {
865  ulval = SARG();
866  if ((long)ulval < 0) {
867  ulval = (u_long)(-(long)ulval);
868  sign = '-';
869  }
870  }
871  base = 10;
872  goto number;
873 #ifdef FLOATING_POINT
874  case 'a':
875  case 'A':
876  if (prec > 0) {
877  flags |= ALT;
878  prec++;
879  fprec = prec;
880  }
881  goto fp_begin;
882  case 'e': /* anomalous precision */
883  case 'E':
884  if (prec != 0)
885  flags |= ALT;
886  prec = (prec == -1) ?
887  DEFPREC + 1 : (fprec = prec + 1);
888  /* FALLTHROUGH */
889  goto fp_begin;
890  case 'f': /* always print trailing zeroes */
891  if (prec != 0)
892  flags |= ALT;
893  case 'g':
894  case 'G':
895  if (prec == -1)
896  prec = DEFPREC;
897  else
898  fprec = prec;
899 fp_begin: _double = va_arg(ap, double);
900  /* do this before tricky precision changes */
901  if (isinf(_double)) {
902  if (_double < 0)
903  sign = '-';
904  cp = "Inf";
905  size = 3;
906  break;
907  }
908  if (isnan(_double)) {
909  cp = "NaN";
910  size = 3;
911  break;
912  }
913  flags |= FPT;
914  cp = cvt(_double, (prec < MAXFRACT ? prec : MAXFRACT), flags, &softsign,
915  &expt, ch, &ndig, buf);
916  if (ch == 'g' || ch == 'G') {
917  if (expt <= -4 || (expt > prec && expt > 1))
918  ch = (ch == 'g') ? 'e' : 'E';
919  else
920  ch = 'g';
921  }
922  if (ch == 'a' || ch == 'A') {
923  flags |= HEXPREFIX;
924  --expt;
925  expsize = exponent(expstr, expt, ch + 'p' - 'a');
926  ch += 'x' - 'a';
927  size = expsize + ndig;
928  if (ndig > 1 || flags & ALT)
929  ++size; /* floating point */
930  }
931  else if (ch <= 'e') { /* 'e' or 'E' fmt */
932  --expt;
933  expsize = exponent(expstr, expt, ch);
934  size = expsize + ndig;
935  if (ndig > 1 || flags & ALT)
936  ++fprec, ++size;
937  } else if (ch == 'f') { /* f fmt */
938  if (expt > 0) {
939  size = expt;
940  if (prec || flags & ALT)
941  size += prec + 1;
942  } else if (!prec) { /* "0" */
943  size = 1;
944  if (flags & ALT)
945  size += 1;
946  } else /* "0.X" */
947  size = prec + 2;
948  } else if (expt >= ndig) { /* fixed g fmt */
949  size = expt;
950  if (flags & ALT)
951  ++size;
952  } else
953  size = ndig + (expt > 0 ?
954  1 : 2 - expt);
955 
956  if (softsign)
957  sign = '-';
958  break;
959 #endif /* FLOATING_POINT */
960  case 'n':
961 #ifdef _HAVE_SANE_QUAD_
962  if (flags & QUADINT)
963  *va_arg(ap, quad_t *) = ret;
964  else if (flags & LONGINT)
965 #else /* _HAVE_SANE_QUAD_ */
966  if (flags & LONGINT)
967 #endif /* _HAVE_SANE_QUAD_ */
968  *va_arg(ap, long *) = ret;
969  else if (flags & SHORTINT)
970  *va_arg(ap, short *) = (short)ret;
971  else
972  *va_arg(ap, int *) = (int)ret;
973  continue; /* no output */
974  case 'O':
975  flags |= LONGINT;
976  /*FALLTHROUGH*/
977  case 'o':
978 #ifdef _HAVE_SANE_QUAD_
979  if (flags & QUADINT)
980  uqval = va_arg(ap, u_quad_t);
981  else
982 #endif /* _HAVE_SANE_QUAD_ */
983  ulval = UARG();
984  base = 8;
985  goto nosign;
986  case 'p':
987  /*
988  * ``The argument shall be a pointer to void. The
989  * value of the pointer is converted to a sequence
990  * of printable characters, in an implementation-
991  * defined manner.''
992  * -- ANSI X3J11
993  */
994  prec = (int)(sizeof(void*)*CHAR_BIT/4);
995 #ifdef _HAVE_LLP64_
996  uqval = (u_quad_t)va_arg(ap, void *);
997  flags = (flags) | QUADINT | HEXPREFIX;
998 #else
999  ulval = (u_long)va_arg(ap, void *);
1000 #ifdef _HAVE_SANE_QUAD_
1001  flags = (flags & ~QUADINT) | HEXPREFIX;
1002 #else /* _HAVE_SANE_QUAD_ */
1003  flags = (flags) | HEXPREFIX;
1004 #endif /* _HAVE_SANE_QUAD_ */
1005 #endif
1006  base = 16;
1007  xdigs = lower_hexdigits;
1008  ch = 'x';
1009  goto nosign;
1010  case 's':
1011  if ((cp = va_arg(ap, char *)) == NULL)
1012  cp = "(null)";
1013  if (prec >= 0) {
1014  /*
1015  * can't use strlen; can only look for the
1016  * NUL in the first `prec' characters, and
1017  * strlen() will go further.
1018  */
1019  const char *p = (char *)memchr(cp, 0, prec);
1020 
1021  if (p != NULL && (p - cp) < prec)
1022  size = (int)(p - cp);
1023  else
1024  size = prec;
1025  }
1026  else {
1027  fieldsz = strlen(cp);
1028  goto long_len;
1029  }
1030  sign = '\0';
1031  break;
1032  case 'U':
1033  flags |= LONGINT;
1034  /*FALLTHROUGH*/
1035  case 'u':
1036 #ifdef _HAVE_SANE_QUAD_
1037  if (flags & QUADINT)
1038  uqval = va_arg(ap, u_quad_t);
1039  else
1040 #endif /* _HAVE_SANE_QUAD_ */
1041  ulval = UARG();
1042  base = 10;
1043  goto nosign;
1044  case 'X':
1045  xdigs = upper_hexdigits;
1046  goto hex;
1047  case 'x':
1048  xdigs = lower_hexdigits;
1049 hex:
1050 #ifdef _HAVE_SANE_QUAD_
1051  if (flags & QUADINT)
1052  uqval = va_arg(ap, u_quad_t);
1053  else
1054 #endif /* _HAVE_SANE_QUAD_ */
1055  ulval = UARG();
1056  base = 16;
1057  /* leading 0x/X only if non-zero */
1058  if (flags & ALT &&
1059 #ifdef _HAVE_SANE_QUAD_
1060  (flags & QUADINT ? uqval != 0 : ulval != 0)
1061 #else /* _HAVE_SANE_QUAD_ */
1062  ulval != 0
1063 #endif /* _HAVE_SANE_QUAD_ */
1064  )
1065  flags |= HEXPREFIX;
1066 
1067  /* unsigned conversions */
1068 nosign: sign = '\0';
1069  /*
1070  * ``... diouXx conversions ... if a precision is
1071  * specified, the 0 flag will be ignored.''
1072  * -- ANSI X3J11
1073  */
1074 number: if ((dprec = prec) >= 0)
1075  flags &= ~ZEROPAD;
1076 
1077  /*
1078  * ``The result of converting a zero value with an
1079  * explicit precision of zero is no characters.''
1080  * -- ANSI X3J11
1081  */
1082  cp = ebuf;
1083 #ifdef _HAVE_SANE_QUAD_
1084  if (flags & QUADINT) {
1085  if (uqval != 0 || prec != 0)
1086  cp = BSD__uqtoa(uqval, ebuf, base,
1087  flags & ALT, xdigs);
1088  } else
1089 #else /* _HAVE_SANE_QUAD_ */
1090 #endif /* _HAVE_SANE_QUAD_ */
1091  {
1092  if (ulval != 0 || prec != 0)
1093  cp = BSD__ultoa(ulval, ebuf, base,
1094  flags & ALT, xdigs);
1095  }
1096  size = (int)(ebuf - cp);
1097  break;
1098  default: /* "%?" prints ?, unless ? is NUL */
1099  if (ch == '\0')
1100  goto done;
1101  /* pretend it was %c with argument ch */
1102  cp = buf;
1103  *buf = ch;
1104  size = 1;
1105  sign = '\0';
1106  break;
1107  }
1108 
1109  /*
1110  * All reasonable formats wind up here. At this point, `cp'
1111  * points to a string which (if not flags&LADJUST) should be
1112  * padded out to `width' places. If flags&ZEROPAD, it should
1113  * first be prefixed by any sign or other prefix; otherwise,
1114  * it should be blank padded before the prefix is emitted.
1115  * After any left-hand padding and prefixing, emit zeroes
1116  * required by a decimal [diouxX] precision, then print the
1117  * string proper, then emit zeroes required by any leftover
1118  * floating precision; finally, if LADJUST, pad with blanks.
1119  *
1120  * Compute actual size, so we know how much to pad.
1121  * fieldsz excludes decimal prec; realsz includes it.
1122  */
1123  fieldsz = size;
1124 long_len:
1125  realsz = dprec > fieldsz ? dprec : fieldsz;
1126  if (sign)
1127  realsz++;
1128  if (flags & HEXPREFIX)
1129  realsz += 2;
1130 
1131  /* right-adjusting blank padding */
1132  if ((flags & (LADJUST|ZEROPAD)) == 0)
1133  PAD_L(width - realsz, blanks);
1134 
1135  /* prefix */
1136  if (sign) {
1137  PRINT(&sign, 1);
1138  }
1139  if (flags & HEXPREFIX) {
1140  ox[0] = '0';
1141  ox[1] = ch;
1142  PRINT(ox, 2);
1143  }
1144 
1145  /* right-adjusting zero padding */
1146  if ((flags & (LADJUST|ZEROPAD)) == ZEROPAD)
1147  PAD_L(width - realsz, zeroes);
1148 
1149  /* leading zeroes from decimal precision */
1150  PAD_L(dprec - fieldsz, zeroes);
1151 
1152  /* the string or number proper */
1153 #ifdef FLOATING_POINT
1154  if ((flags & FPT) == 0) {
1155  PRINT(cp, fieldsz);
1156  } else { /* glue together f_p fragments */
1157  if (flags & HEXPREFIX) {
1158  if (ndig > 1 || flags & ALT) {
1159  ox[2] = *cp++;
1160  ox[3] = '.';
1161  PRINT(ox+2, 2);
1162  if (ndig > 0) PRINT(cp, ndig-1);
1163  } else /* XpYYY */
1164  PRINT(cp, 1);
1165  PAD(fprec-ndig, zeroes);
1166  PRINT(expstr, expsize);
1167  }
1168  else if (ch >= 'f') { /* 'f' or 'g' */
1169  if (_double == 0) {
1170  /* kludge for __dtoa irregularity */
1171  if (ndig <= 1 &&
1172  (flags & ALT) == 0) {
1173  PRINT("0", 1);
1174  } else {
1175  PRINT("0.", 2);
1176  PAD((ndig >= fprec ? ndig - 1 : fprec - (ch != 'f')),
1177  zeroes);
1178  }
1179  } else if (expt == 0 && ndig == 0 && (flags & ALT) == 0) {
1180  PRINT("0", 1);
1181  } else if (expt <= 0) {
1182  PRINT("0.", 2);
1183  PAD(-expt, zeroes);
1184  PRINT(cp, ndig);
1185  if (flags & ALT)
1186  PAD(fprec - ndig + (ch == 'f' ? expt : 0), zeroes);
1187  } else if (expt >= ndig) {
1188  PRINT(cp, ndig);
1189  PAD(expt - ndig, zeroes);
1190  if (flags & ALT)
1191  PRINT(".", 1);
1192  } else {
1193  PRINT(cp, expt);
1194  cp += expt;
1195  PRINT(".", 1);
1196  PRINT(cp, ndig-expt);
1197  if (flags & ALT)
1198  PAD(fprec - ndig + (ch == 'f' ? expt : 0), zeroes);
1199  }
1200  } else { /* 'e' or 'E' */
1201  if (ndig > 1 || flags & ALT) {
1202  ox[0] = *cp++;
1203  ox[1] = '.';
1204  PRINT(ox, 2);
1205  if (_double /*|| flags & ALT == 0*/) {
1206  PRINT(cp, ndig-1);
1207  } else /* 0.[0..] */
1208  /* __dtoa irregularity */
1209  PAD(ndig - 1, zeroes);
1210  if (flags & ALT) PAD(fprec - ndig - 1, zeroes);
1211  } else /* XeYYY */
1212  PRINT(cp, 1);
1213  PRINT(expstr, expsize);
1214  }
1215  }
1216 #else
1217  PRINT(cp, fieldsz);
1218 #endif
1219  /* left-adjusting padding (always blank) */
1220  if (flags & LADJUST)
1221  PAD_L(width - realsz, blanks);
1222 
1223  /* finally, adjust ret */
1224  ret += width > realsz ? width : realsz;
1225 
1226  FLUSH(); /* copy out the I/O vectors */
1227  }
1228 done:
1229  FLUSH();
1230 error:
1231  return (BSD__sferror(fp) ? EOF : ret);
1232  /* NOTREACHED */
1233 }
1234 
1235 #ifdef FLOATING_POINT
1236 
1237 extern char *BSD__dtoa(double, int, int, int *, int *, char **);
1238 extern char *BSD__hdtoa(double, const char *, int, int *, int *, char **);
1239 
1240 static char *
1241 cvt(double value, int ndigits, int flags, char *sign, int *decpt, int ch, int *length, char *buf)
1242 {
1243  int mode, dsgn;
1244  char *digits, *bp, *rve;
1245 
1246  if (ch == 'f')
1247  mode = 3;
1248  else {
1249  mode = 2;
1250  }
1251  if (value < 0) {
1252  value = -value;
1253  *sign = '-';
1254  } else if (value == 0.0 && signbit(value)) {
1255  *sign = '-';
1256  } else {
1257  *sign = '\000';
1258  }
1259  if (ch == 'a' || ch =='A') {
1260  digits = BSD__hdtoa(value,
1261  ch == 'a' ? lower_hexdigits : upper_hexdigits,
1262  ndigits, decpt, &dsgn, &rve);
1263  }
1264  else {
1265  digits = BSD__dtoa(value, mode, ndigits, decpt, &dsgn, &rve);
1266  }
1267  buf[0] = 0; /* rve - digits may be 0 */
1268  memcpy(buf, digits, rve - digits);
1269  xfree(digits);
1270  rve = buf + (rve - digits);
1271  digits = buf;
1272  if (flags & ALT) { /* Print trailing zeros */
1273  bp = digits + ndigits;
1274  if (ch == 'f') {
1275  if (*digits == '0' && value)
1276  *decpt = -ndigits + 1;
1277  bp += *decpt;
1278  }
1279  while (rve < bp)
1280  *rve++ = '0';
1281  }
1282  *length = (int)(rve - digits);
1283  return (digits);
1284 }
1285 
1286 static int
1287 exponent(char *p0, int exp, int fmtch)
1288 {
1289  register char *p, *t;
1290  char expbuf[2 + (MAXEXP < 1000 ? 3 : MAXEXP < 10000 ? 4 : 5)]; /* >= 2 + ceil(log10(MAXEXP)) */
1291 
1292  p = p0;
1293  *p++ = fmtch;
1294  if (exp < 0) {
1295  exp = -exp;
1296  *p++ = '-';
1297  }
1298  else
1299  *p++ = '+';
1300  t = expbuf + sizeof(expbuf);
1301  if (exp > 9) {
1302  do {
1303  *--t = to_char(exp % 10);
1304  } while ((exp /= 10) > 9);
1305  *--t = to_char(exp);
1306  for (; t < expbuf + sizeof(expbuf); *p++ = *t++);
1307  }
1308  else {
1309  if (fmtch & 15) *p++ = '0'; /* other than p or P */
1310  *p++ = to_char(exp);
1311  }
1312  return (int)(p - p0);
1313 }
1314 #endif /* FLOATING_POINT */
u_long
unsigned long u_long
Definition: rb_mjit_min_header-2.7.1.h:1293
__SSTR
#define __SSTR
Definition: vsnprintf.c:196
SARG
#define SARG()
BSD__sferror
#define BSD__sferror(p)
Definition: vsnprintf.c:207
exp
double exp(double)
FPT
#define FPT
Definition: vsnprintf.c:537
ZEROPAD
#define ZEROPAD
Definition: vsnprintf.c:536
__sFILE::_w
size_t _w
Definition: vsnprintf.c:174
n
const char size_t n
Definition: rb_mjit_min_header-2.7.1.h:5456
FILE
struct __sFILE FILE
bp
#define bp()
Definition: internal.h:1445
__suio
Definition: vsnprintf.c:230
GETIOV
#define GETIOV(extra_work)
__sFILE::vwrite
int(* vwrite)()
Definition: vsnprintf.c:181
fmt
const VALUE int int int int int int VALUE char * fmt
Definition: rb_mjit_min_header-2.7.1.h:6462
BSD__hdtoa
#define BSD__hdtoa
Definition: sprintf.c:981
ATTRIBUTE_NO_ADDRESS_SAFETY_ANALYSIS
ATTRIBUTE_NO_ADDRESS_SAFETY_ANALYSIS(static ssize_t BSD_vfprintf(FILE *fp, const char *fmt0, va_list ap))
isinf
#define isinf(__x)
Definition: rb_mjit_min_header-2.7.1.h:3673
INTPTR_FLAG
#define INTPTR_FLAG
LONG_MAX
#define LONG_MAX
Definition: vsnprintf.c:99
CHAR_BIT
#define CHAR_BIT
Definition: ruby.h:227
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