b70576b048
Bug: http://b/67371539 Test: ran tests Change-Id: I899458af92517dc21f874519716fa3f3a0f0e3d6
702 lines
21 KiB
C++
702 lines
21 KiB
C++
/* $OpenBSD: vfprintf.c,v 1.71 2016/01/04 15:47:47 schwarze 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.
|
|
*/
|
|
|
|
#define CHAR_TYPE char
|
|
#define FUNCTION_NAME __vfprintf
|
|
#define CHAR_TYPE_STRLEN strlen
|
|
#define CHAR_TYPE_STRNLEN strnlen
|
|
#define CHAR_TYPE_INF "INF"
|
|
#define CHAR_TYPE_inf "inf"
|
|
#define CHAR_TYPE_NAN "NAN"
|
|
#define CHAR_TYPE_nan "nan"
|
|
#define CHAR_TYPE_ORIENTATION -1
|
|
#include "printf_common.h"
|
|
|
|
int FUNCTION_NAME(FILE* fp, const CHAR_TYPE* fmt0, va_list ap) {
|
|
int n, n2;
|
|
CHAR_TYPE* cp; /* handy char pointer (short term usage) */
|
|
CHAR_TYPE sign; /* sign prefix (' ', '+', '-', or \0) */
|
|
int flags; /* flags as above */
|
|
int ret; /* return value accumulator */
|
|
int width; /* width from format (%8d), or 0 */
|
|
int prec; /* precision from format; <0 for N/A */
|
|
/*
|
|
* We can decompose the printed representation of floating
|
|
* point numbers into several parts, some of which may be empty:
|
|
*
|
|
* [+|-| ] [0x|0X] MMM . NNN [e|E|p|P] [+|-] ZZ
|
|
* A B ---C--- D E F
|
|
*
|
|
* A: 'sign' holds this value if present; '\0' otherwise
|
|
* B: ox[1] holds the 'x' or 'X'; '\0' if not hexadecimal
|
|
* C: cp points to the string MMMNNN. Leading and trailing
|
|
* zeros are not in the string and must be added.
|
|
* D: expchar holds this character; '\0' if no exponent, e.g. %f
|
|
* F: at least two digits for decimal, at least one digit for hex
|
|
*/
|
|
char* decimal_point = NULL;
|
|
int signflag; /* true if float is negative */
|
|
union { /* floating point arguments %[aAeEfFgG] */
|
|
double dbl;
|
|
long double ldbl;
|
|
} fparg;
|
|
int expt; /* integer value of exponent */
|
|
char expchar; /* exponent character: [eEpP\0] */
|
|
char* dtoaend; /* pointer to end of converted digits */
|
|
int expsize; /* character count for expstr */
|
|
int lead; /* sig figs before decimal or group sep */
|
|
int ndig; /* actual number of digits returned by dtoa */
|
|
CHAR_TYPE expstr[MAXEXPDIG + 2]; /* buffer for exponent string: e+ZZZ */
|
|
char* dtoaresult = NULL;
|
|
|
|
uintmax_t _umax; /* 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; /* digits for %[xX] conversion */
|
|
#define NIOV 8
|
|
struct __suio uio; /* output information: summary */
|
|
struct __siov iov[NIOV]; /* ... and individual io vectors */
|
|
struct __siov* iovp; /* for PRINT macro */
|
|
CHAR_TYPE buf[BUF]; /* buffer with space for digits of uintmax_t */
|
|
CHAR_TYPE ox[2]; /* space for 0x; ox[1] is either x, X, or \0 */
|
|
union arg* argtable; /* args, built due to positional arg */
|
|
union arg statargtable[STATIC_ARG_TBL_SIZE];
|
|
size_t argtablesiz;
|
|
int nextarg; /* 1-based argument index */
|
|
va_list orgap; /* original argument pointer */
|
|
CHAR_TYPE* convbuf; /* buffer for wide/multibyte conversion */
|
|
|
|
/*
|
|
* 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 CHAR_TYPE blanks[PADSIZE] = {
|
|
' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' '
|
|
};
|
|
static CHAR_TYPE zeroes[PADSIZE] = {
|
|
'0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0'
|
|
};
|
|
|
|
static const char xdigs_lower[] = "0123456789abcdef";
|
|
static const char xdigs_upper[] = "0123456789ABCDEF";
|
|
|
|
#define PRINT(ptr, len) \
|
|
do { \
|
|
iovp->iov_base = (ptr); \
|
|
iovp->iov_len = (len); \
|
|
uio.uio_resid += (len); \
|
|
iovp++; \
|
|
if (++uio.uio_iovcnt >= NIOV) { \
|
|
if (helpers::sprint(fp, &uio)) goto error; \
|
|
iovp = iov; \
|
|
} \
|
|
} while (0)
|
|
#define FLUSH() \
|
|
do { \
|
|
if (uio.uio_resid && helpers::sprint(fp, &uio)) goto error; \
|
|
uio.uio_iovcnt = 0; \
|
|
iovp = iov; \
|
|
} while (0)
|
|
|
|
_SET_ORIENTATION(fp, CHAR_TYPE_ORIENTATION);
|
|
|
|
// Writing "" to a read only file returns EOF, not 0.
|
|
if (cantwrite(fp)) {
|
|
errno = EBADF;
|
|
return EOF;
|
|
}
|
|
|
|
// Optimize writes to stderr and other unbuffered files).
|
|
if ((fp->_flags & (__SNBF | __SWR | __SRW)) == (__SNBF | __SWR) && fp->_file >= 0) {
|
|
return (__sbprintf(fp, fmt0, ap));
|
|
}
|
|
|
|
CHAR_TYPE* fmt = const_cast<CHAR_TYPE*>(fmt0);
|
|
argtable = NULL;
|
|
nextarg = 1;
|
|
va_copy(orgap, ap);
|
|
uio.uio_iov = iovp = iov;
|
|
uio.uio_resid = 0;
|
|
uio.uio_iovcnt = 0;
|
|
ret = 0;
|
|
convbuf = NULL;
|
|
|
|
/*
|
|
* Scan the format for conversions (`%' character).
|
|
*/
|
|
for (;;) {
|
|
int ch;
|
|
for (cp = fmt; (ch = *fmt) != '\0' && ch != '%'; fmt++) continue;
|
|
if (fmt != cp) {
|
|
ptrdiff_t m = fmt - cp;
|
|
if (m < 0 || m > INT_MAX - ret) goto overflow;
|
|
PRINT(cp, m);
|
|
ret += m;
|
|
}
|
|
if (ch == '\0') goto done;
|
|
fmt++; /* skip over '%' */
|
|
|
|
flags = 0;
|
|
dprec = 0;
|
|
width = 0;
|
|
prec = -1;
|
|
sign = '\0';
|
|
ox[1] = '\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 '\'':
|
|
/* grouping not implemented */
|
|
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.
|
|
*/
|
|
GETASTER(width);
|
|
if (width >= 0) goto rflag;
|
|
if (width == INT_MIN) goto overflow;
|
|
width = -width;
|
|
/* FALLTHROUGH */
|
|
case '-':
|
|
flags |= LADJUST;
|
|
goto rflag;
|
|
case '+':
|
|
sign = '+';
|
|
goto rflag;
|
|
case '.':
|
|
if ((ch = *fmt++) == '*') {
|
|
GETASTER(n);
|
|
prec = n < 0 ? -1 : n;
|
|
goto rflag;
|
|
}
|
|
n = 0;
|
|
while (is_digit(ch)) {
|
|
APPEND_DIGIT(n, ch);
|
|
ch = *fmt++;
|
|
}
|
|
if (ch == '$') {
|
|
nextarg = n;
|
|
if (argtable == NULL) {
|
|
argtable = statargtable;
|
|
if (__find_arguments(fmt0, orgap, &argtable, &argtablesiz) == -1) {
|
|
ret = -1;
|
|
goto error;
|
|
}
|
|
}
|
|
goto rflag;
|
|
}
|
|
prec = n;
|
|
goto reswitch;
|
|
case '0':
|
|
/*
|
|
* ``Note that 0 is taken as a flag, not as the
|
|
* beginning of a field width.''
|
|
* -- ANSI X3J11
|
|
*/
|
|
flags |= ZEROPAD;
|
|
goto rflag;
|
|
case '1':
|
|
case '2':
|
|
case '3':
|
|
case '4':
|
|
case '5':
|
|
case '6':
|
|
case '7':
|
|
case '8':
|
|
case '9':
|
|
n = 0;
|
|
do {
|
|
APPEND_DIGIT(n, ch);
|
|
ch = *fmt++;
|
|
} while (is_digit(ch));
|
|
if (ch == '$') {
|
|
nextarg = n;
|
|
if (argtable == NULL) {
|
|
argtable = statargtable;
|
|
if (__find_arguments(fmt0, orgap, &argtable, &argtablesiz) == -1) {
|
|
ret = -1;
|
|
goto error;
|
|
}
|
|
}
|
|
goto rflag;
|
|
}
|
|
width = n;
|
|
goto reswitch;
|
|
case 'L':
|
|
flags |= LONGDBL;
|
|
goto rflag;
|
|
case 'h':
|
|
if (*fmt == 'h') {
|
|
fmt++;
|
|
flags |= CHARINT;
|
|
} else {
|
|
flags |= SHORTINT;
|
|
}
|
|
goto rflag;
|
|
case 'j':
|
|
flags |= MAXINT;
|
|
goto rflag;
|
|
case 'l':
|
|
if (*fmt == 'l') {
|
|
fmt++;
|
|
flags |= LLONGINT;
|
|
} else {
|
|
flags |= LONGINT;
|
|
}
|
|
goto rflag;
|
|
case 'q':
|
|
flags |= LLONGINT;
|
|
goto rflag;
|
|
case 't':
|
|
flags |= PTRINT;
|
|
goto rflag;
|
|
case 'z':
|
|
flags |= SIZEINT;
|
|
goto rflag;
|
|
case 'C':
|
|
flags |= LONGINT;
|
|
/*FALLTHROUGH*/
|
|
case 'c':
|
|
if (flags & LONGINT) {
|
|
mbstate_t mbs;
|
|
size_t mbseqlen;
|
|
|
|
memset(&mbs, 0, sizeof(mbs));
|
|
mbseqlen = wcrtomb(buf, (wchar_t)GETARG(wint_t), &mbs);
|
|
if (mbseqlen == (size_t)-1) {
|
|
ret = -1;
|
|
goto error;
|
|
}
|
|
cp = buf;
|
|
size = (int)mbseqlen;
|
|
} else {
|
|
*(cp = buf) = GETARG(int);
|
|
size = 1;
|
|
}
|
|
sign = '\0';
|
|
break;
|
|
case 'D':
|
|
flags |= LONGINT;
|
|
/*FALLTHROUGH*/
|
|
case 'd':
|
|
case 'i':
|
|
_umax = SARG();
|
|
if ((intmax_t)_umax < 0) {
|
|
_umax = -_umax;
|
|
sign = '-';
|
|
}
|
|
base = DEC;
|
|
goto number;
|
|
case 'a':
|
|
case 'A':
|
|
if (ch == 'a') {
|
|
ox[1] = 'x';
|
|
xdigs = xdigs_lower;
|
|
expchar = 'p';
|
|
} else {
|
|
ox[1] = 'X';
|
|
xdigs = xdigs_upper;
|
|
expchar = 'P';
|
|
}
|
|
if (prec >= 0) prec++;
|
|
if (dtoaresult) __freedtoa(dtoaresult);
|
|
if (flags & LONGDBL) {
|
|
fparg.ldbl = GETARG(long double);
|
|
dtoaresult = cp = __hldtoa(fparg.ldbl, xdigs, prec, &expt, &signflag, &dtoaend);
|
|
if (dtoaresult == NULL) {
|
|
errno = ENOMEM;
|
|
goto error;
|
|
}
|
|
} else {
|
|
fparg.dbl = GETARG(double);
|
|
dtoaresult = cp = __hdtoa(fparg.dbl, xdigs, prec, &expt, &signflag, &dtoaend);
|
|
if (dtoaresult == NULL) {
|
|
errno = ENOMEM;
|
|
goto error;
|
|
}
|
|
}
|
|
if (prec < 0) prec = dtoaend - dtoaresult;
|
|
if (expt == INT_MAX) ox[1] = '\0';
|
|
goto fp_common;
|
|
case 'e':
|
|
case 'E':
|
|
expchar = ch;
|
|
if (prec < 0) /* account for digit before decpt */
|
|
prec = DEFPREC + 1;
|
|
else
|
|
prec++;
|
|
goto fp_begin;
|
|
case 'f':
|
|
case 'F':
|
|
expchar = '\0';
|
|
goto fp_begin;
|
|
case 'g':
|
|
case 'G':
|
|
expchar = ch - ('g' - 'e');
|
|
if (prec == 0) prec = 1;
|
|
fp_begin:
|
|
if (prec < 0) prec = DEFPREC;
|
|
if (dtoaresult) __freedtoa(dtoaresult);
|
|
if (flags & LONGDBL) {
|
|
fparg.ldbl = GETARG(long double);
|
|
dtoaresult = cp = __ldtoa(&fparg.ldbl, expchar ? 2 : 3, prec, &expt, &signflag, &dtoaend);
|
|
if (dtoaresult == NULL) {
|
|
errno = ENOMEM;
|
|
goto error;
|
|
}
|
|
} else {
|
|
fparg.dbl = GETARG(double);
|
|
dtoaresult = cp = __dtoa(fparg.dbl, expchar ? 2 : 3, prec, &expt, &signflag, &dtoaend);
|
|
if (dtoaresult == NULL) {
|
|
errno = ENOMEM;
|
|
goto error;
|
|
}
|
|
if (expt == 9999) expt = INT_MAX;
|
|
}
|
|
fp_common:
|
|
if (signflag) sign = '-';
|
|
if (expt == INT_MAX) { /* inf or nan */
|
|
if (*cp == 'N') {
|
|
cp = const_cast<CHAR_TYPE*>((ch >= 'a') ? CHAR_TYPE_nan : CHAR_TYPE_NAN);
|
|
} else {
|
|
cp = const_cast<CHAR_TYPE*>((ch >= 'a') ? CHAR_TYPE_inf : CHAR_TYPE_INF);
|
|
}
|
|
size = 3;
|
|
flags &= ~ZEROPAD;
|
|
break;
|
|
}
|
|
flags |= FPT;
|
|
ndig = dtoaend - cp;
|
|
if (ch == 'g' || ch == 'G') {
|
|
if (expt > -4 && expt <= prec) {
|
|
/* Make %[gG] smell like %[fF] */
|
|
expchar = '\0';
|
|
if (flags & ALT)
|
|
prec -= expt;
|
|
else
|
|
prec = ndig - expt;
|
|
if (prec < 0) prec = 0;
|
|
} else {
|
|
/*
|
|
* Make %[gG] smell like %[eE], but
|
|
* trim trailing zeroes if no # flag.
|
|
*/
|
|
if (!(flags & ALT)) prec = ndig;
|
|
}
|
|
}
|
|
if (expchar) {
|
|
expsize = exponent(expstr, expt - 1, expchar);
|
|
size = expsize + prec;
|
|
if (prec > 1 || flags & ALT) ++size;
|
|
} else {
|
|
/* space for digits before decimal point */
|
|
if (expt > 0)
|
|
size = expt;
|
|
else /* "0" */
|
|
size = 1;
|
|
/* space for decimal pt and following digits */
|
|
if (prec || flags & ALT) size += prec + 1;
|
|
lead = expt;
|
|
}
|
|
break;
|
|
#ifndef NO_PRINTF_PERCENT_N
|
|
case 'n':
|
|
if (flags & LLONGINT)
|
|
*GETARG(long long*) = ret;
|
|
else if (flags & LONGINT)
|
|
*GETARG(long*) = ret;
|
|
else if (flags & SHORTINT)
|
|
*GETARG(short*) = ret;
|
|
else if (flags & CHARINT)
|
|
*GETARG(signed char*) = ret;
|
|
else if (flags & PTRINT)
|
|
*GETARG(ptrdiff_t*) = ret;
|
|
else if (flags & SIZEINT)
|
|
*GETARG(ssize_t*) = ret;
|
|
else if (flags & MAXINT)
|
|
*GETARG(intmax_t*) = ret;
|
|
else
|
|
*GETARG(int*) = ret;
|
|
continue; /* no output */
|
|
#endif /* NO_PRINTF_PERCENT_N */
|
|
case 'O':
|
|
flags |= LONGINT;
|
|
/*FALLTHROUGH*/
|
|
case 'o':
|
|
_umax = 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
|
|
*/
|
|
_umax = (u_long)GETARG(void*);
|
|
base = HEX;
|
|
xdigs = xdigs_lower;
|
|
ox[1] = 'x';
|
|
goto nosign;
|
|
case 'S':
|
|
flags |= LONGINT;
|
|
/*FALLTHROUGH*/
|
|
case 's':
|
|
if (flags & LONGINT) {
|
|
wchar_t* wcp;
|
|
|
|
free(convbuf);
|
|
convbuf = NULL;
|
|
if ((wcp = GETARG(wchar_t*)) == NULL) {
|
|
cp = const_cast<char*>("(null)");
|
|
} else {
|
|
convbuf = helpers::wcsconv(wcp, prec);
|
|
if (convbuf == NULL) {
|
|
ret = -1;
|
|
goto error;
|
|
}
|
|
cp = convbuf;
|
|
}
|
|
} else if ((cp = GETARG(char*)) == NULL) {
|
|
cp = const_cast<char*>("(null)");
|
|
}
|
|
if (prec >= 0) {
|
|
size = CHAR_TYPE_STRNLEN(cp, prec);
|
|
} else {
|
|
size_t len;
|
|
|
|
if ((len = CHAR_TYPE_STRLEN(cp)) > INT_MAX) goto overflow;
|
|
size = (int)len;
|
|
}
|
|
sign = '\0';
|
|
break;
|
|
case 'U':
|
|
flags |= LONGINT;
|
|
/*FALLTHROUGH*/
|
|
case 'u':
|
|
_umax = UARG();
|
|
base = DEC;
|
|
goto nosign;
|
|
case 'X':
|
|
xdigs = xdigs_upper;
|
|
goto hex;
|
|
case 'x':
|
|
xdigs = xdigs_lower;
|
|
hex:
|
|
_umax = UARG();
|
|
base = HEX;
|
|
/* leading 0x/X only if non-zero */
|
|
if (flags & ALT && _umax != 0) ox[1] = ch;
|
|
|
|
/* 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
|
|
*/
|
|
cp = buf + BUF;
|
|
if (_umax != 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 {
|
|
*--cp = to_char(_umax & 7);
|
|
_umax >>= 3;
|
|
} while (_umax);
|
|
/* handle octal leading 0 */
|
|
if (flags & ALT && *cp != '0') *--cp = '0';
|
|
break;
|
|
|
|
case DEC:
|
|
/* many numbers are 1 digit */
|
|
while (_umax >= 10) {
|
|
*--cp = to_char(_umax % 10);
|
|
_umax /= 10;
|
|
}
|
|
*--cp = to_char(_umax);
|
|
break;
|
|
|
|
case HEX:
|
|
do {
|
|
*--cp = xdigs[_umax & 15];
|
|
_umax >>= 4;
|
|
} while (_umax);
|
|
break;
|
|
|
|
default:
|
|
abort();
|
|
}
|
|
}
|
|
size = buf + BUF - cp;
|
|
if (size > BUF) abort(); /* should never happen */
|
|
break;
|
|
default: /* "%?" prints ?, unless ? is NUL */
|
|
if (ch == '\0') goto done;
|
|
/* pretend it was %c with argument ch */
|
|
cp = buf;
|
|
*cp = ch;
|
|
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++;
|
|
if (ox[1]) realsz += 2;
|
|
|
|
/* right-adjusting blank padding */
|
|
if ((flags & (LADJUST | ZEROPAD)) == 0) PAD(width - realsz, blanks);
|
|
|
|
/* prefix */
|
|
if (sign) PRINT(&sign, 1);
|
|
if (ox[1]) { /* ox[1] is either x, X, or \0 */
|
|
ox[0] = '0';
|
|
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 */
|
|
if ((flags & FPT) == 0) {
|
|
PRINT(cp, size);
|
|
} else { /* glue together f_p fragments */
|
|
if (decimal_point == NULL) decimal_point = nl_langinfo(RADIXCHAR);
|
|
if (!expchar) { /* %[fF] or sufficiently short %[gG] */
|
|
if (expt <= 0) {
|
|
PRINT(zeroes, 1);
|
|
if (prec || flags & ALT) PRINT(decimal_point, 1);
|
|
PAD(-expt, zeroes);
|
|
/* already handled initial 0's */
|
|
prec += expt;
|
|
} else {
|
|
PRINTANDPAD(cp, dtoaend, lead, zeroes);
|
|
cp += lead;
|
|
if (prec || flags & ALT) PRINT(decimal_point, 1);
|
|
}
|
|
PRINTANDPAD(cp, dtoaend, prec, zeroes);
|
|
} else { /* %[eE] or sufficiently long %[gG] */
|
|
if (prec > 1 || flags & ALT) {
|
|
buf[0] = *cp++;
|
|
buf[1] = *decimal_point;
|
|
PRINT(buf, 2);
|
|
PRINT(cp, ndig - 1);
|
|
PAD(prec - ndig, zeroes);
|
|
} else { /* XeYYY */
|
|
PRINT(cp, 1);
|
|
}
|
|
PRINT(expstr, expsize);
|
|
}
|
|
}
|
|
/* left-adjusting padding (always blank) */
|
|
if (flags & LADJUST) PAD(width - realsz, blanks);
|
|
|
|
/* finally, adjust ret */
|
|
if (width < realsz) width = realsz;
|
|
if (width > INT_MAX - ret) goto overflow;
|
|
ret += width;
|
|
|
|
FLUSH(); /* copy out the I/O vectors */
|
|
}
|
|
done:
|
|
FLUSH();
|
|
error:
|
|
va_end(orgap);
|
|
if (__sferror(fp)) ret = -1;
|
|
goto finish;
|
|
|
|
overflow:
|
|
errno = ENOMEM;
|
|
ret = -1;
|
|
|
|
finish:
|
|
free(convbuf);
|
|
if (dtoaresult) __freedtoa(dtoaresult);
|
|
if (argtable != NULL && argtable != statargtable) {
|
|
munmap(argtable, argtablesiz);
|
|
argtable = NULL;
|
|
}
|
|
return (ret);
|
|
}
|