2
* Copyright (c) 1990, 1993
3
* The Regents of the University of California. All rights reserved.
5
* This code is derived from software contributed to Berkeley by
8
* Redistribution and use in source and binary forms, with or without
9
* modification, are permitted provided that the following conditions
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.
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
36
* From ftp://ftp.cs.berkeley.edu/pub/4bsd/README.Impt.License.Change
37
* paragraph 3 above is now null and void.
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.
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.
52
* snprintf should be the only externally visible item.
54
* As of 7-31-97 FLOATING_POINT is NOT provided. The code is somewhat
55
* non-portable, so it is disabled.
58
/* Define FLOATING_POINT to get floating point. */
60
#define FLOATING_POINT
63
#include <sys/types.h>
64
#define u_long unsigned long
65
#define u_short unsigned short
66
#define u_int unsigned int
68
#if !defined(HAVE_STDARG_PROTOTYPES)
70
#define HAVE_STDARG_PROTOTYPES 1
75
#if defined(HAVE_STDARG_PROTOTYPES)
88
#define _BSD_VA_LIST_ va_list
98
/* assuming 32bit(2's compliment) long */
99
# define LONG_MAX 2147483647
104
#if defined(__hpux) && !defined(__GNUC__) && !defined(__STDC__)
111
#endif /* People who don't like const sys_error */
114
#if defined(__hpux) && !defined(__GNUC__) || defined(__DECC)
118
#if !defined(__CYGWIN32__) && defined(__hpux) && !defined(__GNUC__)
127
* NB: to fit things in six character monocase externals, the stdio
128
* code uses the prefix `__s' for stdio objects, typically followed
129
* by a three-character attempt at a mnemonic.
134
unsigned char *_base;
140
* stdio state variables.
142
* The following always hold:
144
* if (_flags&(__SLBF|__SWR)) == (__SLBF|__SWR),
145
* _lbfsize is -_bf._size, else _lbfsize is 0
146
* if _flags&__SRD, _w is 0
147
* if _flags&__SWR, _r is 0
149
* This ensures that the getc and putc macros (or inline functions) never
150
* try to write or read from a file that is in `read' or `write' mode.
151
* (Moreover, they can, and do, automatically switch from read mode to
152
* write mode, and back, on "r+" and "w+" files.)
154
* _lbfsize is used only to make the inline line-buffered output stream
155
* code as compact as possible.
157
* _ub, _up, and _ur are used when ungetc() pushes back more characters
158
* than fit in the current _bf, or when ungetc() pushes back a character
159
* that does not match the previous one in _bf. When this happens,
160
* _ub._base becomes non-nil (i.e., a stream has ungetc() data iff
161
* _ub._base!=NULL) and _up and _ur save the current values of _p and _r.
163
* NB: see WARNING above before changing the layout of this structure!
165
typedef struct __sFILE {
166
unsigned char *_p; /* current position in (some) buffer */
168
size_t _r; /* read space left for getc() */
170
size_t _w; /* write space left for putc() */
171
short _flags; /* flags, below; this FILE is free if 0 */
172
short _file; /* fileno, if Unix descriptor, else -1 */
173
struct __sbuf _bf; /* the buffer (at least 1 byte, if !NULL) */
174
size_t _lbfsize; /* 0 or -_bf._size, for inline putc */
175
int (*vwrite)(/* struct __sFILE*, struct __suio * */);
179
#define __SLBF 0x0001 /* line buffered */
180
#define __SNBF 0x0002 /* unbuffered */
181
#define __SRD 0x0004 /* OK to read */
182
#define __SWR 0x0008 /* OK to write */
183
/* RD and WR are never simultaneously asserted */
184
#define __SRW 0x0010 /* open for reading & writing */
185
#define __SEOF 0x0020 /* found EOF */
186
#define __SERR 0x0040 /* found error */
187
#define __SMBF 0x0080 /* _buf is from malloc */
188
#define __SAPP 0x0100 /* fdopen()ed in append mode */
189
#define __SSTR 0x0200 /* this is an sprintf/snprintf string */
190
#define __SOPT 0x0400 /* do fseek() optimisation */
191
#define __SNPT 0x0800 /* do not do fseek() optimisation */
192
#define __SOFF 0x1000 /* set iff _offset is in fact correct */
193
#define __SMOD 0x2000 /* true => fgetln modified _p text */
199
#define __sfeof(p) (((p)->_flags & __SEOF) != 0)
200
#define __sferror(p) (((p)->_flags & __SERR) != 0)
201
#define __sclearerr(p) ((void)((p)->_flags &= ~(__SERR|__SEOF)))
202
#define __sfileno(p) ((p)->_file)
207
#define feof(p) __sfeof(p)
208
#define ferror(p) __sferror(p)
209
#define clearerr(p) __sclearerr(p)
212
#define fileno(p) __sfileno(p)
217
* I/O descriptors for __sfvwrite().
220
const void *iov_base;
224
struct __siov *uio_iov;
229
#if !defined(HAVE_VSNPRINTF) || !defined(HAVE_SNPRINTF)
231
* Write some memory regions. Return zero on success, EOF on error.
233
* This routine is large and unsightly, but most of the ugliness due
234
* to the three different kinds of output buffering is handled here.
236
static int BSD__sfvwrite(fp, uio)
238
register struct __suio *uio;
241
register const char *p;
242
register struct __siov *iov;
245
if ((len = uio->uio_resid) == 0)
248
#define MIN(a, b) ((a) < (b) ? (a) : (b))
250
#define COPY(n) (void)memcpy((void *)fp->_p, (void *)p, (size_t)(n))
256
#define GETIOV(extra_work) \
260
len = iov->iov_len; \
263
if (fp->_flags & __SNBF) {
264
/* fjc 7-31-97 Will never happen. We are working with
267
} else if ((fp->_flags & __SLBF) == 0) {
269
* Fully buffered: fill partially full buffer, if any,
270
* and then flush. If there is no partial buffer, write
271
* one _bf._size byte chunk directly (without copying).
273
* String output is a special case: write as many bytes
274
* as fit, but pretend we wrote everything. This makes
275
* snprintf() return the number of bytes needed, rather
276
* than the number used, and avoids its write function
277
* (so that the write function can be invalid).
282
if (fp->_flags & __SSTR) {
285
COPY(w); /* copy MIN(fp->_w,len), */
288
w = len; /* but pretend copied all */
290
/* fjc 7-31-97 Will never happen. We are working with
296
} while ((uio->uio_resid -= w) != 0);
298
/* fjc 7-31-97 Will never happen. We are working with
307
* Actual printf innards.
309
* This code is large and complicated...
313
* Flush out all the vectors defined by the given uio,
314
* then reset it so that it can be reused.
317
BSD__sprint(FILE *fp, register struct __suio *uio)
321
if (uio->uio_resid == 0) {
325
err = (*fp->vwrite)(fp, uio);
333
* Helper function for `fprintf to unbuffered unix file': creates a
334
* temporary buffer. We only work on write-only files; this avoids
335
* worries about ungetc buffers and so forth.
338
BSD__sbprintf(register FILE *fp, const char *fmt, va_list ap)
340
/* We don't support files. */
346
* Macros for converting digits to letters and vice versa
348
#define to_digit(c) ((c) - '0')
349
#define is_digit(c) ((unsigned)to_digit(c) <= 9)
350
#define to_char(n) ((n) + '0')
352
#ifdef _HAVE_SANE_QUAD_
354
* Convert an unsigned long long to ASCII for printf purposes, returning
355
* a pointer to the first character of the string representation.
356
* Octal numbers can be forced to have a leading zero; hex numbers
357
* use the given digits.
360
BSD__uqtoa(register u_quad_t val, char *endp, int base, int octzero, const char *xdigs)
362
register char *cp = endp;
366
* Handle the three cases separately, in the hope of getting
367
* better/faster code.
371
if (val < 10) { /* many numbers are 1 digit */
372
*--cp = to_char(val);
376
* On many machines, unsigned arithmetic is harder than
377
* signed arithmetic, so we do at most one unsigned mod and
378
* divide; this is sufficient to reduce the range of
379
* the incoming value to where signed arithmetic works.
381
if (val > LLONG_MAX) {
382
*--cp = to_char(val % 10);
387
*--cp = to_char(sval % 10);
394
*--cp = to_char(val & 7);
397
if (octzero && *cp != '0')
403
*--cp = xdigs[val & 15];
412
break; /* fjc 7-31-97. Don't reference abort() here */
416
#endif /* _HAVE_SANE_QUAD_ */
419
* Convert an unsigned long to ASCII for printf purposes, returning
420
* a pointer to the first character of the string representation.
421
* Octal numbers can be forced to have a leading zero; hex numbers
422
* use the given digits.
425
BSD__ultoa(register u_long val, char *endp, int base, int octzero, const char *xdigs)
427
register char *cp = endp;
431
* Handle the three cases separately, in the hope of getting
432
* better/faster code.
436
if (val < 10) { /* many numbers are 1 digit */
437
*--cp = to_char(val);
441
* On many machines, unsigned arithmetic is harder than
442
* signed arithmetic, so we do at most one unsigned mod and
443
* divide; this is sufficient to reduce the range of
444
* the incoming value to where signed arithmetic works.
446
if (val > LONG_MAX) {
447
*--cp = to_char(val % 10);
452
*--cp = to_char(sval % 10);
459
*--cp = to_char(val & 7);
462
if (octzero && *cp != '0')
468
*--cp = xdigs[val & 15];
477
break; /* fjc 7-31-97. Don't reference abort() here */
482
#ifdef FLOATING_POINT
484
/* #include "floatio.h" */
494
#define BUF (MAXEXP+MAXFRACT+1) /* + decimal point */
497
static char *cvt __P((double, int, int, char *, int *, int, int *, char *));
498
static int exponent __P((char *, int, int));
500
#else /* no FLOATING_POINT */
504
#endif /* FLOATING_POINT */
508
* Flags used during conversion.
510
#define ALT 0x001 /* alternate form */
511
#define HEXPREFIX 0x002 /* add 0x or 0X prefix */
512
#define LADJUST 0x004 /* left adjustment */
513
#define LONGDBL 0x008 /* long double; unimplemented */
514
#define LONGINT 0x010 /* long integer */
516
#ifdef _HAVE_SANE_QUAD_
517
#define QUADINT 0x020 /* quad integer */
518
#endif /* _HAVE_SANE_QUAD_ */
520
#define SHORTINT 0x040 /* short integer */
521
#define ZEROPAD 0x080 /* zero (as opposed to blank) pad */
522
#define FPT 0x100 /* Floating point number */
524
BSD_vfprintf(FILE *fp, const char *fmt0, va_list ap)
526
register const char *fmt; /* format string */
527
register int ch; /* character from fmt */
528
register int n; /* handy integer (short term usage) */
529
register const char *cp;/* handy char pointer (short term usage) */
530
register struct __siov *iovp;/* for PRINT macro */
531
register int flags; /* flags as above */
532
int ret; /* return value accumulator */
533
int width; /* width from format (%8d), or 0 */
534
int prec; /* precision from format (%.3d), or -1 */
535
char sign; /* sign prefix (' ', '+', '-', or \0) */
536
#ifdef FLOATING_POINT
537
char softsign; /* temporary negative sign for floats */
538
double _double = 0; /* double precision arguments %[eEfgG] */
539
int expt; /* integer value of exponent */
540
int expsize = 0; /* character count for expstr */
541
int ndig = 0; /* actual number of digits returned by cvt */
542
char expstr[7]; /* buffer for exponent string */
544
u_long ulval; /* integer arguments %[diouxX] */
545
#ifdef _HAVE_SANE_QUAD_
546
u_quad_t uqval; /* %q integers */
547
#endif /* _HAVE_SANE_QUAD_ */
548
int base; /* base for [diouxX] conversion */
549
int dprec; /* a copy of prec if [diouxX], 0 otherwise */
550
int fieldsz; /* field size expanded by sign, etc */
551
int realsz; /* field size expanded by dprec */
552
int size; /* size of converted field or string */
553
const char *xdigs = 0; /* digits for [xX] conversion */
555
struct __suio uio; /* output information: summary */
556
struct __siov iov[NIOV];/* ... and individual io vectors */
557
char buf[BUF]; /* space for %c, %[diouxX], %[eEfgG] */
558
char ox[2]; /* space for 0x hex-prefix */
559
char *const ebuf = buf + sizeof(buf);
562
* Choose PADSIZE to trade efficiency vs. size. If larger printf
563
* fields occur frequently, increase PADSIZE and make the initializers
566
#define PADSIZE 16 /* pad chunk size */
567
static const char blanks[PADSIZE] =
568
{' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' '};
569
static const char zeroes[PADSIZE] =
570
{'0','0','0','0','0','0','0','0','0','0','0','0','0','0','0','0'};
573
* BEWARE, these `goto error' on error, and PAD uses `n'.
575
#define PRINT(ptr, len) { \
576
iovp->iov_base = (ptr); \
577
iovp->iov_len = (len); \
578
uio.uio_resid += (len); \
580
if (++uio.uio_iovcnt >= NIOV) { \
581
if (BSD__sprint(fp, &uio)) \
586
#define PAD(howmany, with) { \
587
if ((n = (howmany)) > 0) { \
588
while (n > PADSIZE) { \
589
PRINT(with, PADSIZE); \
596
if (uio.uio_resid && BSD__sprint(fp, &uio)) \
598
uio.uio_iovcnt = 0; \
603
* To extend shorts properly, we need both signed and unsigned
604
* argument extraction methods.
607
(flags&LONGINT ? va_arg(ap, long) : \
608
flags&SHORTINT ? (long)(short)va_arg(ap, int) : \
609
(long)va_arg(ap, int))
611
(flags&LONGINT ? va_arg(ap, u_long) : \
612
flags&SHORTINT ? (u_long)(u_short)va_arg(ap, int) : \
613
(u_long)va_arg(ap, u_int))
615
/* optimise fprintf(stderr) (and other unbuffered Unix files) */
616
if ((fp->_flags & (__SNBF|__SWR|__SRW)) == (__SNBF|__SWR) &&
618
return (BSD__sbprintf(fp, fmt0, ap));
621
uio.uio_iov = iovp = iov;
628
* Scan the format for conversions (`%' character).
631
for (cp = fmt; (ch = *fmt) != '\0' && ch != '%'; fmt++)
633
if ((n = fmt - cp) != 0) {
639
fmt++; /* skip over '%' */
648
reswitch: switch (ch) {
651
* ``If the space and + flags both appear, the space
652
* flag will be ignored.''
663
* ``A negative field width argument is taken as a
664
* - flag followed by a positive field width.''
666
* They don't exclude field widths read from args.
668
if ((width = va_arg(ap, int)) >= 0)
679
if ((ch = *fmt++) == '*') {
681
prec = n < 0 ? -1 : n;
685
while (is_digit(ch)) {
686
n = 10 * n + to_digit(ch);
689
prec = n < 0 ? -1 : n;
693
* ``Note that 0 is taken as a flag, not as the
694
* beginning of a field width.''
699
case '1': case '2': case '3': case '4':
700
case '5': case '6': case '7': case '8': case '9':
703
n = 10 * n + to_digit(ch);
705
} while (is_digit(ch));
708
#ifdef FLOATING_POINT
716
#if SIZEOF_PTRDIFF_T == SIZEOF_LONG
722
#ifdef _HAVE_SANE_QUAD_
723
#if SIZEOF_PTRDIFF_T == SIZEOF_LONG_LONG
729
#endif /* _HAVE_SANE_QUAD_ */
732
*buf = (char)va_arg(ap, int);
741
#ifdef _HAVE_SANE_QUAD_
742
if (flags & QUADINT) {
743
uqval = va_arg(ap, quad_t);
744
if ((quad_t)uqval < 0) {
749
#endif /* _HAVE_SANE_QUAD_ */
752
if ((long)ulval < 0) {
759
#ifdef FLOATING_POINT
760
case 'e': /* anomalous precision */
764
prec = (prec == -1) ?
765
DEFPREC + 1 : prec + 1;
768
case 'f': /* always print trailing zeroes */
775
fp_begin: _double = va_arg(ap, double);
776
/* do this before tricky precision changes */
777
if (isinf(_double)) {
784
if (isnan(_double)) {
790
cp = cvt(_double, prec, flags, &softsign,
791
&expt, ch, &ndig, buf);
792
if (ch == 'g' || ch == 'G') {
793
if (expt <= -4 || (expt > prec && expt > 1))
794
ch = (ch == 'g') ? 'e' : 'E';
798
if (ch <= 'e') { /* 'e' or 'E' fmt */
800
expsize = exponent(expstr, expt, ch);
801
size = expsize + ndig;
802
if (ndig > 1 || flags & ALT)
804
} else if (ch == 'f') { /* f fmt */
807
if (prec || flags & ALT)
809
} else if (!prec) { /* "0" */
813
} else if (expt >= ndig) { /* fixed g fmt */
818
size = ndig + (expt > 0 ?
824
#endif /* FLOATING_POINT */
826
#ifdef _HAVE_SANE_QUAD_
828
*va_arg(ap, quad_t *) = ret;
829
else if (flags & LONGINT)
830
#else /* _HAVE_SANE_QUAD_ */
832
#endif /* _HAVE_SANE_QUAD_ */
833
*va_arg(ap, long *) = ret;
834
else if (flags & SHORTINT)
835
*va_arg(ap, short *) = ret;
837
*va_arg(ap, int *) = ret;
838
continue; /* no output */
843
#ifdef _HAVE_SANE_QUAD_
845
uqval = va_arg(ap, u_quad_t);
847
#endif /* _HAVE_SANE_QUAD_ */
853
* ``The argument shall be a pointer to void. The
854
* value of the pointer is converted to a sequence
855
* of printable characters, in an implementation-
859
prec = sizeof(void*)*CHAR_BIT/4;
861
uqval = (u_long)va_arg(ap, void *);
862
flags = (flags) | QUADINT | HEXPREFIX;
864
ulval = (u_long)va_arg(ap, void *);
865
#ifdef _HAVE_SANE_QUAD_
866
flags = (flags & ~QUADINT) | HEXPREFIX;
867
#else /* _HAVE_SANE_QUAD_ */
868
flags = (flags) | HEXPREFIX;
869
#endif /* _HAVE_SANE_QUAD_ */
872
xdigs = "0123456789abcdef";
876
if ((cp = va_arg(ap, char *)) == NULL)
880
* can't use strlen; can only look for the
881
* NUL in the first `prec' characters, and
882
* strlen() will go further.
884
const char *p = (char *)memchr(cp, 0, prec);
900
#ifdef _HAVE_SANE_QUAD_
902
uqval = va_arg(ap, u_quad_t);
904
#endif /* _HAVE_SANE_QUAD_ */
909
xdigs = "0123456789ABCDEF";
912
xdigs = "0123456789abcdef";
914
#ifdef _HAVE_SANE_QUAD_
916
uqval = va_arg(ap, u_quad_t);
918
#endif /* _HAVE_SANE_QUAD_ */
921
/* leading 0x/X only if non-zero */
923
#ifdef _HAVE_SANE_QUAD_
924
(flags & QUADINT ? uqval != 0 : ulval != 0)
925
#else /* _HAVE_SANE_QUAD_ */
927
#endif /* _HAVE_SANE_QUAD_ */
931
/* unsigned conversions */
934
* ``... diouXx conversions ... if a precision is
935
* specified, the 0 flag will be ignored.''
938
number: if ((dprec = prec) >= 0)
942
* ``The result of converting a zero value with an
943
* explicit precision of zero is no characters.''
946
#ifdef _HAVE_SANE_QUAD_
947
if (flags & QUADINT) {
948
if (uqval != 0 || prec != 0)
949
cp = BSD__uqtoa(uqval, ebuf, base,
952
#else /* _HAVE_SANE_QUAD_ */
953
#endif /* _HAVE_SANE_QUAD_ */
955
if (ulval != 0 || prec != 0)
956
cp = BSD__ultoa(ulval, ebuf, base,
961
default: /* "%?" prints ?, unless ? is NUL */
964
/* pretend it was %c with argument ch */
973
* All reasonable formats wind up here. At this point, `cp'
974
* points to a string which (if not flags&LADJUST) should be
975
* padded out to `width' places. If flags&ZEROPAD, it should
976
* first be prefixed by any sign or other prefix; otherwise,
977
* it should be blank padded before the prefix is emitted.
978
* After any left-hand padding and prefixing, emit zeroes
979
* required by a decimal [diouxX] precision, then print the
980
* string proper, then emit zeroes required by any leftover
981
* floating precision; finally, if LADJUST, pad with blanks.
983
* Compute actual size, so we know how much to pad.
984
* fieldsz excludes decimal prec; realsz includes it.
989
else if (flags & HEXPREFIX)
991
realsz = dprec > fieldsz ? dprec : fieldsz;
993
/* right-adjusting blank padding */
994
if ((flags & (LADJUST|ZEROPAD)) == 0)
995
PAD(width - realsz, blanks);
1000
} else if (flags & HEXPREFIX) {
1006
/* right-adjusting zero padding */
1007
if ((flags & (LADJUST|ZEROPAD)) == ZEROPAD)
1008
PAD(width - realsz, zeroes);
1010
/* leading zeroes from decimal precision */
1011
PAD(dprec - fieldsz, zeroes);
1013
/* the string or number proper */
1014
#ifdef FLOATING_POINT
1015
if ((flags & FPT) == 0) {
1017
} else { /* glue together f_p fragments */
1018
if (ch >= 'f') { /* 'f' or 'g' */
1020
/* kludge for __dtoa irregularity */
1022
(flags & ALT) == 0) {
1026
PAD(ndig - 1, zeroes);
1028
} else if (expt == 0 && ndig == 0 && (flags & ALT) == 0) {
1030
} else if (expt <= 0) {
1034
} else if (expt >= ndig) {
1036
PAD(expt - ndig, zeroes);
1043
PRINT(cp, ndig-expt);
1045
} else { /* 'e' or 'E' */
1046
if (ndig > 1 || flags & ALT) {
1050
if (_double || flags & ALT == 0) {
1052
} else /* 0.[0..] */
1053
/* __dtoa irregularity */
1054
PAD(ndig - 1, zeroes);
1057
PRINT(expstr, expsize);
1063
/* left-adjusting padding (always blank) */
1064
if (flags & LADJUST)
1065
PAD(width - realsz, blanks);
1067
/* finally, adjust ret */
1068
ret += width > realsz ? width : realsz;
1070
FLUSH(); /* copy out the I/O vectors */
1075
return (__sferror(fp) ? EOF : ret);
1079
#ifdef FLOATING_POINT
1081
extern char *BSD__dtoa __P((double, int, int, int *, int *, char **));
1084
cvt(value, ndigits, flags, sign, decpt, ch, length, buf)
1086
int ndigits, flags, *decpt, ch, *length;
1090
char *digits, *bp, *rve;
1100
} else if (value == 0.0 && 1.0/value < 0) {
1105
digits = BSD__dtoa(value, mode, ndigits, decpt, &dsgn, &rve);
1106
memcpy(buf, digits, rve - digits);
1108
rve = buf + (rve - digits);
1110
if (flags & ALT) { /* Print trailing zeros */
1111
bp = digits + ndigits;
1113
if (*digits == '0' && value)
1114
*decpt = -ndigits + 1;
1117
if (value == 0) /* kludge for __dtoa irregularity */
1122
*length = rve - digits;
1127
exponent(p0, exp, fmtch)
1131
register char *p, *t;
1132
char expbuf[MAXEXP];
1142
t = expbuf + MAXEXP;
1145
*--t = to_char(exp % 10);
1146
} while ((exp /= 10) > 9);
1147
*--t = to_char(exp);
1148
for (; t < expbuf + MAXEXP; *p++ = *t++);
1152
*p++ = to_char(exp);
1156
#endif /* FLOATING_POINT */
1158
#ifndef HAVE_VSNPRINTF
1160
vsnprintf(str, n, fmt, ap)
1171
f._flags = __SWR | __SSTR;
1172
f._bf._base = f._p = (unsigned char *)str;
1173
f._bf._size = f._w = n - 1;
1174
f.vwrite = BSD__sfvwrite;
1175
ret = BSD_vfprintf(&f, fmt, ap);
1181
#if defined(LIBC_SCCS) && !defined(lint)
1182
static char sccsid[] = "@(#)snprintf.c 8.1 (Berkeley) 6/4/93";
1183
#endif /* LIBC_SCCS and not lint */
1185
#ifndef HAVE_SNPRINTF
1187
#if defined(HAVE_STDARG_PROTOTYPES)
1188
snprintf(char *str, size_t n, char const *fmt, ...)
1190
snprintf(str, n, fmt, va_alist)
1203
#if defined(HAVE_STDARG_PROTOTYPES)
1208
f._flags = __SWR | __SSTR;
1209
f._bf._base = f._p = (unsigned char *)str;
1210
f._bf._size = f._w = n - 1;
1211
f.vwrite = BSD__sfvwrite;
1212
ret = BSD_vfprintf(&f, fmt, ap);
added
removed
missing/vsnprintf.c
