use vfwprintf.c
This commit is contained in:
christos
parent
093145397b
commit
f38f949967
|
|
@ -1,915 +1,2 @@
|
|||
/* $NetBSD: vfprintf.c,v 1.56 2007/02/02 23:00:28 christos Exp $ */
|
||||
|
||||
/*-
|
||||
* Copyright (c) 1990 The Regents of the University of California.
|
||||
* All rights reserved.
|
||||
*
|
||||
* This code is derived from software contributed to Berkeley by
|
||||
* Chris Torek.
|
||||
*
|
||||
* Redistribution and use in source and binary forms, with or without
|
||||
* modification, are permitted provided that the following conditions
|
||||
* are met:
|
||||
* 1. Redistributions of source code must retain the above copyright
|
||||
* notice, this list of conditions and the following disclaimer.
|
||||
* 2. Redistributions in binary form must reproduce the above copyright
|
||||
* notice, this list of conditions and the following disclaimer in the
|
||||
* documentation and/or other materials provided with the distribution.
|
||||
* 3. Neither the name of the University nor the names of its contributors
|
||||
* may be used to endorse or promote products derived from this software
|
||||
* without specific prior written permission.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
||||
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
||||
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
||||
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
||||
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
||||
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
||||
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
||||
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
||||
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
||||
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
||||
* SUCH DAMAGE.
|
||||
*/
|
||||
|
||||
#include <sys/cdefs.h>
|
||||
#if defined(LIBC_SCCS) && !defined(lint)
|
||||
#if 0
|
||||
static char *sccsid = "@(#)vfprintf.c 5.50 (Berkeley) 12/16/92";
|
||||
#else
|
||||
__RCSID("$NetBSD: vfprintf.c,v 1.56 2007/02/02 23:00:28 christos Exp $");
|
||||
#endif
|
||||
#endif /* LIBC_SCCS and not lint */
|
||||
|
||||
/*
|
||||
* Actual printf innards.
|
||||
*
|
||||
* This code is large and complicated...
|
||||
*/
|
||||
|
||||
#include "namespace.h"
|
||||
#include <sys/types.h>
|
||||
|
||||
#include <assert.h>
|
||||
#include <errno.h>
|
||||
#include <stdarg.h>
|
||||
#include <stddef.h>
|
||||
#include <stdint.h>
|
||||
#include <stdio.h>
|
||||
#include <stdlib.h>
|
||||
#include <string.h>
|
||||
#include <wchar.h>
|
||||
#include <limits.h>
|
||||
|
||||
#include "reentrant.h"
|
||||
#include "local.h"
|
||||
#include "fvwrite.h"
|
||||
#include "extern.h"
|
||||
|
||||
static int __sprint __P((FILE *, struct __suio *));
|
||||
static int __sbprintf __P((FILE *, const char *, va_list))
|
||||
__attribute__((__format__(__printf__, 2, 0)));
|
||||
|
||||
/*
|
||||
* Flush out all the vectors defined by the given uio,
|
||||
* then reset it so that it can be reused.
|
||||
*/
|
||||
static int
|
||||
__sprint(fp, uio)
|
||||
FILE *fp;
|
||||
struct __suio *uio;
|
||||
{
|
||||
int err;
|
||||
|
||||
_DIAGASSERT(fp != NULL);
|
||||
_DIAGASSERT(uio != NULL);
|
||||
|
||||
if (uio->uio_resid == 0) {
|
||||
uio->uio_iovcnt = 0;
|
||||
return (0);
|
||||
}
|
||||
err = __sfvwrite(fp, uio);
|
||||
uio->uio_resid = 0;
|
||||
uio->uio_iovcnt = 0;
|
||||
return (err);
|
||||
}
|
||||
|
||||
/*
|
||||
* Helper function for `fprintf to unbuffered unix file': creates a
|
||||
* temporary buffer. We only work on write-only files; this avoids
|
||||
* worries about ungetc buffers and so forth.
|
||||
*/
|
||||
static int
|
||||
__sbprintf(fp, fmt, ap)
|
||||
FILE *fp;
|
||||
const char *fmt;
|
||||
va_list ap;
|
||||
{
|
||||
int ret;
|
||||
FILE fake;
|
||||
struct __sfileext fakeext;
|
||||
unsigned char buf[BUFSIZ];
|
||||
|
||||
_DIAGASSERT(fp != NULL);
|
||||
_DIAGASSERT(fmt != NULL);
|
||||
|
||||
_FILEEXT_SETUP(&fake, &fakeext);
|
||||
|
||||
/* copy the important variables */
|
||||
fake._flags = fp->_flags & ~__SNBF;
|
||||
fake._file = fp->_file;
|
||||
fake._cookie = fp->_cookie;
|
||||
fake._write = fp->_write;
|
||||
|
||||
/* set up the buffer */
|
||||
fake._bf._base = fake._p = buf;
|
||||
fake._bf._size = fake._w = sizeof(buf);
|
||||
fake._lbfsize = 0; /* not actually used, but Just In Case */
|
||||
|
||||
/* do the work, then copy any error status */
|
||||
ret = vfprintf(&fake, fmt, ap);
|
||||
if (ret >= 0 && fflush(&fake))
|
||||
ret = -1;
|
||||
if (fake._flags & __SERR)
|
||||
fp->_flags |= __SERR;
|
||||
return (ret);
|
||||
}
|
||||
|
||||
|
||||
#ifndef NO_FLOATING_POINT
|
||||
#include <locale.h>
|
||||
#include <math.h>
|
||||
#include "floatio.h"
|
||||
|
||||
#define BUF (MAXEXP+MAXFRACT+1) /* + decimal point */
|
||||
#define DEFPREC 6
|
||||
|
||||
static char *cvt __P((double, int, int, char *, int *, int, int *));
|
||||
static int exponent __P((char *, int, int));
|
||||
|
||||
#else /* FLOATING_POINT */
|
||||
|
||||
#define BUF 40
|
||||
|
||||
#endif /* NO_FLOATING_POINT */
|
||||
|
||||
/*
|
||||
* Macros for converting digits to letters and vice versa
|
||||
*/
|
||||
#define to_digit(c) ((c) - '0')
|
||||
#define is_digit(c) ((unsigned)to_digit(c) <= 9)
|
||||
#define to_char(n) ((char)((n) + '0'))
|
||||
|
||||
/*
|
||||
* Flags used during conversion.
|
||||
*/
|
||||
#define ALT 0x001 /* alternate form */
|
||||
#define HEXPREFIX 0x002 /* add 0x or 0X prefix */
|
||||
#define LADJUST 0x004 /* left adjustment */
|
||||
#define LONGDBL 0x008 /* long double; unimplemented */
|
||||
#define LONGINT 0x010 /* long integer */
|
||||
#define QUADINT 0x020 /* quad integer */
|
||||
#define SHORTINT 0x040 /* short integer */
|
||||
#define MAXINT 0x080 /* (unsigned) intmax_t */
|
||||
#define PTRINT 0x100 /* (unsigned) ptrdiff_t */
|
||||
#define SIZEINT 0x200 /* (signed) size_t */
|
||||
#define ZEROPAD 0x400 /* zero (as opposed to blank) pad */
|
||||
#define FPT 0x800 /* Floating point number */
|
||||
|
||||
static inline int
|
||||
add_digit(int value, int d)
|
||||
{
|
||||
unsigned ret;
|
||||
|
||||
ret = value * 10U + d;
|
||||
if (__predict_false(value > (INT_MAX - 9) / 10)) {
|
||||
if (value > INT_MAX / 10 || ret > INT_MAX)
|
||||
return -1;
|
||||
}
|
||||
return ret;
|
||||
}
|
||||
|
||||
int
|
||||
vfprintf(fp, fmt0, ap)
|
||||
FILE *fp;
|
||||
const char *fmt0;
|
||||
_BSD_VA_LIST_ ap;
|
||||
{
|
||||
int ret;
|
||||
|
||||
FLOCKFILE(fp);
|
||||
ret = __vfprintf_unlocked(fp, fmt0, ap);
|
||||
FUNLOCKFILE(fp);
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
|
||||
|
||||
int
|
||||
__vfprintf_unlocked(fp, fmt0, ap)
|
||||
FILE *fp;
|
||||
const char *fmt0;
|
||||
_BSD_VA_LIST_ ap;
|
||||
{
|
||||
const char *fmt;/* format string */
|
||||
int ch; /* character from fmt */
|
||||
int n; /* handy integer (short term usage) */
|
||||
const char *cp; /* handy char pointer (short term usage) */
|
||||
char *bp; /* handy char pointer (short term usage) */
|
||||
struct __siov *iovp;/* for PRINT macro */
|
||||
int flags; /* flags as above */
|
||||
int ret; /* return value accumulator */
|
||||
int width; /* width from format (%8d), or 0 */
|
||||
int prec; /* precision from format (%.3d), or -1 */
|
||||
char sign; /* sign prefix (' ', '+', '-', or \0) */
|
||||
wchar_t wc;
|
||||
mbstate_t ps;
|
||||
#ifndef NO_FLOATING_POINT
|
||||
char *decimal_point = NULL;
|
||||
char softsign; /* temporary negative sign for floats */
|
||||
double _double; /* double precision arguments %[eEfgG] */
|
||||
int expt; /* integer value of exponent */
|
||||
int expsize = 0; /* character count for expstr */
|
||||
int ndig; /* actual number of digits returned by cvt */
|
||||
char expstr[7]; /* buffer for exponent string */
|
||||
char *dtoaresult = NULL;
|
||||
#endif
|
||||
|
||||
#ifdef __GNUC__ /* gcc has builtin quad type (long long) SOS */
|
||||
#define quad_t long long
|
||||
#define u_quad_t unsigned long long
|
||||
#endif
|
||||
|
||||
#define INTMAX_T intmax_t
|
||||
#define UINTMAX_T uintmax_t
|
||||
|
||||
UINTMAX_T _uintmax; /* integer arguments %[diouxX] */
|
||||
enum { OCT, DEC, HEX } base;/* base for [diouxX] conversion */
|
||||
int dprec; /* a copy of prec if [diouxX], 0 otherwise */
|
||||
int realsz; /* field size expanded by dprec */
|
||||
int size; /* size of converted field or string */
|
||||
const char *xdigs = NULL;/* digits for [xX] conversion */
|
||||
#define NIOV 8
|
||||
struct __suio uio; /* output information: summary */
|
||||
struct __siov iov[NIOV];/* ... and individual io vectors */
|
||||
char buf[BUF]; /* space for %c, %[diouxX], %[eEfgG] */
|
||||
char ox[2]; /* space for 0x hex-prefix */
|
||||
|
||||
/*
|
||||
* Choose PADSIZE to trade efficiency vs. size. If larger printf
|
||||
* fields occur frequently, increase PADSIZE and make the initialisers
|
||||
* below longer.
|
||||
*/
|
||||
#define PADSIZE 16 /* pad chunk size */
|
||||
static const char blanks[PADSIZE] =
|
||||
{' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' '};
|
||||
static const char zeroes[PADSIZE] =
|
||||
{'0','0','0','0','0','0','0','0','0','0','0','0','0','0','0','0'};
|
||||
|
||||
/*
|
||||
* BEWARE, these `goto error' on error, and PAD uses `n'.
|
||||
*/
|
||||
#define PRINT(ptr, len) { \
|
||||
iovp->iov_base = __UNCONST(ptr); \
|
||||
iovp->iov_len = (len); \
|
||||
uio.uio_resid += (len); \
|
||||
iovp++; \
|
||||
if (++uio.uio_iovcnt >= NIOV) { \
|
||||
if (__sprint(fp, &uio)) \
|
||||
goto error; \
|
||||
iovp = iov; \
|
||||
} \
|
||||
}
|
||||
#define PAD(howmany, with) { \
|
||||
if ((n = (howmany)) > 0) { \
|
||||
while (n > PADSIZE) { \
|
||||
PRINT(with, PADSIZE); \
|
||||
n -= PADSIZE; \
|
||||
} \
|
||||
PRINT(with, n); \
|
||||
} \
|
||||
}
|
||||
#define FLUSH() { \
|
||||
if (uio.uio_resid && __sprint(fp, &uio)) \
|
||||
goto error; \
|
||||
uio.uio_iovcnt = 0; \
|
||||
iovp = iov; \
|
||||
}
|
||||
|
||||
/*
|
||||
* To extend shorts properly, we need both signed and unsigned
|
||||
* argument extraction methods.
|
||||
*/
|
||||
#define SARG() \
|
||||
(flags&MAXINT ? va_arg(ap, intmax_t) : \
|
||||
flags&PTRINT ? va_arg(ap, ptrdiff_t) : \
|
||||
flags&SIZEINT ? va_arg(ap, ssize_t) : /* XXX */ \
|
||||
flags&QUADINT ? va_arg(ap, quad_t) : \
|
||||
flags&LONGINT ? va_arg(ap, long) : \
|
||||
flags&SHORTINT ? (long)(short)va_arg(ap, int) : \
|
||||
(long)va_arg(ap, int))
|
||||
#define UARG() \
|
||||
(flags&MAXINT ? va_arg(ap, uintmax_t) : \
|
||||
flags&PTRINT ? va_arg(ap, uintptr_t) : /* XXX */ \
|
||||
flags&SIZEINT ? va_arg(ap, size_t) : \
|
||||
flags&QUADINT ? va_arg(ap, u_quad_t) : \
|
||||
flags&LONGINT ? va_arg(ap, u_long) : \
|
||||
flags&SHORTINT ? (u_long)(u_short)va_arg(ap, int) : \
|
||||
(u_long)va_arg(ap, u_int))
|
||||
|
||||
_DIAGASSERT(fp != NULL);
|
||||
_DIAGASSERT(fmt0 != NULL);
|
||||
|
||||
_SET_ORIENTATION(fp, -1);
|
||||
|
||||
/* sorry, fprintf(read_only_file, "") returns -1, not 0 */
|
||||
if (cantwrite(fp)) {
|
||||
errno = EBADF;
|
||||
return (-1);
|
||||
}
|
||||
|
||||
/* optimise fprintf(stderr) (and other unbuffered Unix files) */
|
||||
if ((fp->_flags & (__SNBF|__SWR|__SRW)) == (__SNBF|__SWR) &&
|
||||
fp->_file >= 0) {
|
||||
ret = __sbprintf(fp, fmt0, ap);
|
||||
return (ret);
|
||||
}
|
||||
|
||||
fmt = fmt0;
|
||||
uio.uio_iov = iovp = iov;
|
||||
uio.uio_resid = 0;
|
||||
uio.uio_iovcnt = 0;
|
||||
ret = 0;
|
||||
|
||||
memset(&ps, 0, sizeof(ps));
|
||||
|
||||
/*
|
||||
* Scan the format for conversions (`%' character).
|
||||
*/
|
||||
for (;;) {
|
||||
cp = fmt;
|
||||
while ((n = mbrtowc(&wc, fmt, MB_CUR_MAX, &ps)) > 0) {
|
||||
fmt += n;
|
||||
if (wc == '%') {
|
||||
fmt--;
|
||||
break;
|
||||
}
|
||||
}
|
||||
if (fmt != cp) {
|
||||
ptrdiff_t m = fmt - cp;
|
||||
if (m < 0 || m > INT_MAX - ret)
|
||||
goto overflow;
|
||||
PRINT(cp, m);
|
||||
ret += m;
|
||||
}
|
||||
if (n <= 0)
|
||||
goto done;
|
||||
fmt++; /* skip over '%' */
|
||||
|
||||
flags = 0;
|
||||
dprec = 0;
|
||||
width = 0;
|
||||
prec = -1;
|
||||
sign = '\0';
|
||||
|
||||
rflag: ch = *fmt++;
|
||||
reswitch: switch (ch) {
|
||||
case ' ':
|
||||
/*
|
||||
* ``If the space and + flags both appear, the space
|
||||
* flag will be ignored.''
|
||||
* -- ANSI X3J11
|
||||
*/
|
||||
if (!sign)
|
||||
sign = ' ';
|
||||
goto rflag;
|
||||
case '#':
|
||||
flags |= ALT;
|
||||
goto rflag;
|
||||
case '*':
|
||||
/*
|
||||
* ``A negative field width argument is taken as a
|
||||
* - flag followed by a positive field width.''
|
||||
* -- ANSI X3J11
|
||||
* They don't exclude field widths read from args.
|
||||
*/
|
||||
if ((width = va_arg(ap, int)) >= 0)
|
||||
goto rflag;
|
||||
if (-(unsigned)width > INT_MAX)
|
||||
goto overflow;
|
||||
width = -width;
|
||||
/* FALLTHROUGH */
|
||||
case '-':
|
||||
flags |= LADJUST;
|
||||
goto rflag;
|
||||
case '+':
|
||||
sign = '+';
|
||||
goto rflag;
|
||||
case '.':
|
||||
if ((ch = *fmt++) == '*') {
|
||||
n = va_arg(ap, int);
|
||||
prec = n < 0 ? -1 : n;
|
||||
goto rflag;
|
||||
}
|
||||
prec = 0;
|
||||
while (ch == '0')
|
||||
ch = *fmt++;
|
||||
while (is_digit(ch)) {
|
||||
prec = add_digit(prec, to_digit(ch));
|
||||
if (prec < 0)
|
||||
goto overflow;
|
||||
ch = *fmt++;
|
||||
}
|
||||
goto reswitch;
|
||||
case '0':
|
||||
/*
|
||||
* ``Note that 0 is taken as a flag, not as the
|
||||
* beginning of a field width.''
|
||||
* -- ANSI X3J11
|
||||
*/
|
||||
flags |= ZEROPAD;
|
||||
goto rflag;
|
||||
case '1': case '2': case '3': case '4':
|
||||
case '5': case '6': case '7': case '8': case '9':
|
||||
width = 0;
|
||||
do {
|
||||
width = add_digit(width, to_digit(ch));
|
||||
if (width < 0)
|
||||
goto overflow;
|
||||
ch = *fmt++;
|
||||
} while (is_digit(ch));
|
||||
goto reswitch;
|
||||
#ifndef NO_FLOATING_POINT
|
||||
case 'L':
|
||||
flags |= LONGDBL;
|
||||
goto rflag;
|
||||
#endif
|
||||
case 'h':
|
||||
flags |= SHORTINT;
|
||||
goto rflag;
|
||||
case 'j':
|
||||
flags |= MAXINT;
|
||||
goto rflag;
|
||||
case 'l':
|
||||
if (*fmt == 'l') {
|
||||
fmt++;
|
||||
flags |= QUADINT;
|
||||
} else {
|
||||
flags |= LONGINT;
|
||||
}
|
||||
goto rflag;
|
||||
case 'q':
|
||||
flags |= QUADINT;
|
||||
goto rflag;
|
||||
case 't':
|
||||
flags |= PTRINT;
|
||||
goto rflag;
|
||||
case 'z':
|
||||
flags |= SIZEINT;
|
||||
goto rflag;
|
||||
case 'c':
|
||||
*buf = va_arg(ap, int);
|
||||
cp = buf;
|
||||
size = 1;
|
||||
sign = '\0';
|
||||
break;
|
||||
case 'D':
|
||||
flags |= LONGINT;
|
||||
/*FALLTHROUGH*/
|
||||
case 'd':
|
||||
case 'i':
|
||||
_uintmax = SARG();
|
||||
if ((intmax_t)_uintmax < 0) {
|
||||
_uintmax = -_uintmax;
|
||||
sign = '-';
|
||||
}
|
||||
base = DEC;
|
||||
goto number;
|
||||
#ifndef NO_FLOATING_POINT
|
||||
case 'e':
|
||||
case 'E':
|
||||
case 'f':
|
||||
case 'F':
|
||||
case 'g':
|
||||
case 'G':
|
||||
if (prec == -1) {
|
||||
prec = DEFPREC;
|
||||
} else if ((ch == 'g' || ch == 'G') && prec == 0) {
|
||||
prec = 1;
|
||||
}
|
||||
|
||||
if (flags & LONGDBL) {
|
||||
_double = (double) va_arg(ap, long double);
|
||||
} else {
|
||||
_double = va_arg(ap, double);
|
||||
}
|
||||
|
||||
/* do this before tricky precision changes */
|
||||
if (isinf(_double)) {
|
||||
if (_double < 0)
|
||||
sign = '-';
|
||||
if (ch == 'E' || ch == 'F' || ch == 'G')
|
||||
cp = "INF";
|
||||
else
|
||||
cp = "inf";
|
||||
size = 3;
|
||||
break;
|
||||
}
|
||||
if (isnan(_double)) {
|
||||
if (ch == 'E' || ch == 'F' || ch == 'G')
|
||||
cp = "NAN";
|
||||
else
|
||||
cp = "nan";
|
||||
size = 3;
|
||||
break;
|
||||
}
|
||||
|
||||
flags |= FPT;
|
||||
if (dtoaresult)
|
||||
__freedtoa(dtoaresult);
|
||||
cp = dtoaresult = cvt(_double, prec, flags, &softsign,
|
||||
&expt, ch, &ndig);
|
||||
if (ch == 'g' || ch == 'G') {
|
||||
if (expt <= -4 || expt > prec)
|
||||
ch = (ch == 'g') ? 'e' : 'E';
|
||||
else
|
||||
ch = 'g';
|
||||
}
|
||||
if (ch == 'e' || ch == 'E') {
|
||||
--expt;
|
||||
expsize = exponent(expstr, expt, ch);
|
||||
size = expsize + ndig;
|
||||
if (ndig > 1 || flags & ALT)
|
||||
++size;
|
||||
} else if (ch == 'f' || ch == 'F') {
|
||||
if (expt > 0) {
|
||||
size = expt;
|
||||
if (prec || flags & ALT)
|
||||
size += prec + 1;
|
||||
} else /* "0.X" */
|
||||
size = prec + 2;
|
||||
} else if (expt >= ndig) { /* fixed g fmt */
|
||||
size = expt;
|
||||
if (flags & ALT)
|
||||
++size;
|
||||
} else
|
||||
size = ndig + (expt > 0 ?
|
||||
1 : 2 - expt);
|
||||
|
||||
if (softsign)
|
||||
sign = '-';
|
||||
break;
|
||||
#endif /* NO_FLOATING_POINT */
|
||||
case 'n':
|
||||
if (flags & MAXINT)
|
||||
*va_arg(ap, intmax_t *) = ret;
|
||||
else if (flags & PTRINT)
|
||||
*va_arg(ap, ptrdiff_t *) = ret;
|
||||
else if (flags & SIZEINT)
|
||||
*va_arg(ap, ssize_t *) = ret; /* XXX */
|
||||
else if (flags & QUADINT)
|
||||
*va_arg(ap, quad_t *) = ret;
|
||||
else if (flags & LONGINT)
|
||||
*va_arg(ap, long *) = ret;
|
||||
else if (flags & SHORTINT)
|
||||
*va_arg(ap, short *) = ret;
|
||||
else
|
||||
*va_arg(ap, int *) = ret;
|
||||
continue; /* no output */
|
||||
case 'O':
|
||||
flags |= LONGINT;
|
||||
/*FALLTHROUGH*/
|
||||
case 'o':
|
||||
_uintmax = UARG();
|
||||
base = OCT;
|
||||
goto nosign;
|
||||
case 'p':
|
||||
/*
|
||||
* ``The argument shall be a pointer to void. The
|
||||
* value of the pointer is converted to a sequence
|
||||
* of printable characters, in an implementation-
|
||||
* defined manner.''
|
||||
* -- ANSI X3J11
|
||||
*/
|
||||
/* NOSTRICT */
|
||||
_uintmax = (u_long)va_arg(ap, void *);
|
||||
base = HEX;
|
||||
xdigs = "0123456789abcdef";
|
||||
flags |= HEXPREFIX;
|
||||
ch = 'x';
|
||||
goto nosign;
|
||||
case 's':
|
||||
if ((cp = va_arg(ap, char *)) == NULL)
|
||||
cp = "(null)";
|
||||
if (prec >= 0) {
|
||||
/*
|
||||
* can't use strlen; can only look for the
|
||||
* NUL in the first `prec' characters, and
|
||||
* strlen() will go further.
|
||||
*/
|
||||
for (n = 0; n < prec && cp[n]; n++)
|
||||
continue;
|
||||
size = n;
|
||||
} else {
|
||||
size_t len = strlen(cp);
|
||||
|
||||
if (len > INT_MAX)
|
||||
goto overflow;
|
||||
size = len;
|
||||
}
|
||||
sign = '\0';
|
||||
break;
|
||||
case 'U':
|
||||
flags |= LONGINT;
|
||||
/*FALLTHROUGH*/
|
||||
case 'u':
|
||||
_uintmax = UARG();
|
||||
base = DEC;
|
||||
goto nosign;
|
||||
case 'X':
|
||||
xdigs = "0123456789ABCDEF";
|
||||
goto hex;
|
||||
case 'x':
|
||||
xdigs = "0123456789abcdef";
|
||||
hex: _uintmax = UARG();
|
||||
base = HEX;
|
||||
/* leading 0x/X only if non-zero */
|
||||
if (flags & ALT && _uintmax != 0)
|
||||
flags |= HEXPREFIX;
|
||||
|
||||
/* unsigned conversions */
|
||||
nosign: sign = '\0';
|
||||
/*
|
||||
* ``... diouXx conversions ... if a precision is
|
||||
* specified, the 0 flag will be ignored.''
|
||||
* -- ANSI X3J11
|
||||
*/
|
||||
number: if ((dprec = prec) >= 0)
|
||||
flags &= ~ZEROPAD;
|
||||
|
||||
/*
|
||||
* ``The result of converting a zero value with an
|
||||
* explicit precision of zero is no characters.''
|
||||
* -- ANSI X3J11
|
||||
*/
|
||||
bp = buf + BUF;
|
||||
if (_uintmax != 0 || prec != 0) {
|
||||
/*
|
||||
* Unsigned mod is hard, and unsigned mod
|
||||
* by a constant is easier than that by
|
||||
* a variable; hence this switch.
|
||||
*/
|
||||
switch (base) {
|
||||
case OCT:
|
||||
do {
|
||||
*--bp = to_char(_uintmax & 7);
|
||||
_uintmax >>= 3;
|
||||
} while (_uintmax);
|
||||
/* handle octal leading 0 */
|
||||
if (flags & ALT && *bp != '0')
|
||||
*--bp = '0';
|
||||
break;
|
||||
|
||||
case DEC:
|
||||
/* many numbers are 1 digit */
|
||||
while (_uintmax >= 10) {
|
||||
*--bp = to_char(_uintmax % 10);
|
||||
_uintmax /= 10;
|
||||
}
|
||||
*--bp = to_char(_uintmax);
|
||||
break;
|
||||
|
||||
case HEX:
|
||||
do {
|
||||
*--bp = xdigs[(size_t)
|
||||
(_uintmax & 15)];
|
||||
_uintmax >>= 4;
|
||||
} while (_uintmax);
|
||||
break;
|
||||
|
||||
default:
|
||||
cp = "bug in vfprintf: bad base";
|
||||
size = strlen(cp);
|
||||
goto skipsize;
|
||||
}
|
||||
}
|
||||
cp = bp;
|
||||
size = buf + BUF - bp;
|
||||
skipsize:
|
||||
break;
|
||||
default: /* "%?" prints ?, unless ? is NUL */
|
||||
if (ch == '\0')
|
||||
goto done;
|
||||
/* pretend it was %c with argument ch */
|
||||
*buf = ch;
|
||||
cp = buf;
|
||||
size = 1;
|
||||
sign = '\0';
|
||||
break;
|
||||
}
|
||||
|
||||
/*
|
||||
* All reasonable formats wind up here. At this point, `cp'
|
||||
* points to a string which (if not flags&LADJUST) should be
|
||||
* padded out to `width' places. If flags&ZEROPAD, it should
|
||||
* first be prefixed by any sign or other prefix; otherwise,
|
||||
* it should be blank padded before the prefix is emitted.
|
||||
* After any left-hand padding and prefixing, emit zeroes
|
||||
* required by a decimal [diouxX] precision, then print the
|
||||
* string proper, then emit zeroes required by any leftover
|
||||
* floating precision; finally, if LADJUST, pad with blanks.
|
||||
*
|
||||
* Compute actual size, so we know how much to pad.
|
||||
* size excludes decimal prec; realsz includes it.
|
||||
*/
|
||||
realsz = dprec > size ? dprec : size;
|
||||
if (sign)
|
||||
realsz++;
|
||||
else if (flags & HEXPREFIX)
|
||||
realsz+= 2;
|
||||
|
||||
/* right-adjusting blank padding */
|
||||
if ((flags & (LADJUST|ZEROPAD)) == 0)
|
||||
PAD(width - realsz, blanks);
|
||||
|
||||
/* prefix */
|
||||
if (sign) {
|
||||
PRINT(&sign, 1);
|
||||
} else if (flags & HEXPREFIX) {
|
||||
ox[0] = '0';
|
||||
ox[1] = ch;
|
||||
PRINT(ox, 2);
|
||||
}
|
||||
|
||||
/* right-adjusting zero padding */
|
||||
if ((flags & (LADJUST|ZEROPAD)) == ZEROPAD)
|
||||
PAD(width - realsz, zeroes);
|
||||
|
||||
/* leading zeroes from decimal precision */
|
||||
PAD(dprec - size, zeroes);
|
||||
|
||||
/* the string or number proper */
|
||||
#ifndef NO_FLOATING_POINT
|
||||
if ((flags & FPT) == 0) {
|
||||
PRINT(cp, size);
|
||||
} else { /* glue together f_p fragments */
|
||||
if (ch >= 'f') { /* 'f' or 'g' */
|
||||
if (decimal_point == NULL)
|
||||
decimal_point =
|
||||
localeconv()->decimal_point;
|
||||
if (_double == 0) {
|
||||
/* kludge for __dtoa irregularity */
|
||||
PRINT("0", 1);
|
||||
if (expt < ndig || (flags & ALT) != 0) {
|
||||
PRINT(decimal_point, 1);
|
||||
PAD(ndig - 1, zeroes);
|
||||
}
|
||||
} else if (expt <= 0) {
|
||||
PRINT("0", 1);
|
||||
PRINT(decimal_point, 1);
|
||||
PAD(-expt, zeroes);
|
||||
PRINT(cp, ndig);
|
||||
} else if (expt >= ndig) {
|
||||
PRINT(cp, ndig);
|
||||
PAD(expt - ndig, zeroes);
|
||||
if (flags & ALT)
|
||||
PRINT(".", 1);
|
||||
} else {
|
||||
PRINT(cp, expt);
|
||||
cp += expt;
|
||||
PRINT(".", 1);
|
||||
PRINT(cp, ndig-expt);
|
||||
}
|
||||
} else { /* 'e' or 'E' */
|
||||
if (ndig > 1 || flags & ALT) {
|
||||
ox[0] = *cp++;
|
||||
ox[1] = '.';
|
||||
PRINT(ox, 2);
|
||||
if (_double) {
|
||||
PRINT(cp, ndig-1);
|
||||
} else /* 0.[0..] */
|
||||
/* __dtoa irregularity */
|
||||
PAD(ndig - 1, zeroes);
|
||||
} else /* XeYYY */
|
||||
PRINT(cp, 1);
|
||||
PRINT(expstr, expsize);
|
||||
}
|
||||
}
|
||||
#else
|
||||
PRINT(cp, size);
|
||||
#endif
|
||||
/* left-adjusting padding (always blank) */
|
||||
if (flags & LADJUST)
|
||||
PAD(width - realsz, blanks);
|
||||
|
||||
/* finally, adjust ret */
|
||||
n = width > realsz ? width : realsz;
|
||||
if (n > INT_MAX - ret)
|
||||
goto overflow;
|
||||
ret += n;
|
||||
|
||||
FLUSH(); /* copy out the I/O vectors */
|
||||
}
|
||||
done:
|
||||
FLUSH();
|
||||
error:
|
||||
if (__sferror(fp))
|
||||
ret = -1;
|
||||
goto finish;
|
||||
|
||||
overflow:
|
||||
errno = EOVERFLOW;
|
||||
ret = -1;
|
||||
|
||||
finish:
|
||||
#ifndef NO_FLOATING_POINT
|
||||
if (dtoaresult)
|
||||
__freedtoa(dtoaresult);
|
||||
#endif
|
||||
return (ret);
|
||||
}
|
||||
|
||||
#ifndef NO_FLOATING_POINT
|
||||
|
||||
static char *
|
||||
cvt(value, ndigits, flags, sign, decpt, ch, length)
|
||||
double value;
|
||||
int ndigits, flags, *decpt, ch, *length;
|
||||
char *sign;
|
||||
{
|
||||
int mode, dsgn;
|
||||
char *digits, *bp, *rve;
|
||||
|
||||
_DIAGASSERT(decpt != NULL);
|
||||
_DIAGASSERT(length != NULL);
|
||||
_DIAGASSERT(sign != NULL);
|
||||
|
||||
if (ch == 'f') {
|
||||
mode = 3; /* ndigits after the decimal point */
|
||||
} else {
|
||||
/* To obtain ndigits after the decimal point for the 'e'
|
||||
* and 'E' formats, round to ndigits + 1 significant
|
||||
* figures.
|
||||
*/
|
||||
if (ch == 'e' || ch == 'E') {
|
||||
ndigits++;
|
||||
}
|
||||
mode = 2; /* ndigits significant digits */
|
||||
}
|
||||
|
||||
digits = __dtoa(value, mode, ndigits, decpt, &dsgn, &rve);
|
||||
if (dsgn) {
|
||||
value = -value;
|
||||
*sign = '-';
|
||||
} else
|
||||
*sign = '\000';
|
||||
if ((ch != 'g' && ch != 'G') || flags & ALT) { /* Print trailing zeros */
|
||||
bp = digits + ndigits;
|
||||
if (ch == 'f') {
|
||||
if (*digits == '0' && value)
|
||||
*decpt = -ndigits + 1;
|
||||
bp += *decpt;
|
||||
}
|
||||
if (value == 0) /* kludge for __dtoa irregularity */
|
||||
rve = bp;
|
||||
while (rve < bp)
|
||||
*rve++ = '0';
|
||||
}
|
||||
*length = rve - digits;
|
||||
return (digits);
|
||||
}
|
||||
|
||||
static int
|
||||
exponent(p0, expon, fmtch)
|
||||
char *p0;
|
||||
int expon, fmtch;
|
||||
{
|
||||
char *p, *t;
|
||||
char expbuf[MAXEXP];
|
||||
|
||||
_DIAGASSERT(p0 != NULL);
|
||||
|
||||
p = p0;
|
||||
*p++ = fmtch;
|
||||
if (expon < 0) {
|
||||
expon = -expon;
|
||||
*p++ = '-';
|
||||
}
|
||||
else
|
||||
*p++ = '+';
|
||||
t = expbuf + MAXEXP;
|
||||
if (expon > 9) {
|
||||
do {
|
||||
*--t = to_char(expon % 10);
|
||||
} while ((expon /= 10) > 9);
|
||||
*--t = to_char(expon);
|
||||
for (; t < expbuf + MAXEXP; *p++ = *t++);
|
||||
}
|
||||
else {
|
||||
*p++ = '0';
|
||||
*p++ = to_char(expon);
|
||||
}
|
||||
return (p - p0);
|
||||
}
|
||||
#endif /* NO_FLOATING_POINT */
|
||||
#define NARROW
|
||||
#include "vfwprintf.c"
|
||||
|
|
|
|||
Loading…
Reference in New Issue