int
__printf_render_float(struct __printf_io* io, const struct printf_info* pi, const void* const* arg) {
int prec; /* precision from format; <0 for N/A */
char* dtoaresult; /* buffer allocated by dtoa */
char expchar; /* exponent character: [eEpP\0] */
char* cp;
int expt; /* integer value of exponent */
int signflag; /* true if float is negative */
char* dtoaend; /* pointer to end of converted digits */
char sign; /* sign prefix (' ', '+', '-', or \0) */
int size; /* size of converted field or string */
int ndig; /* actual number of digits returned by dtoa */
int expsize; /* character count for expstr */
char expstr[MAXEXPDIG + 2]; /* buffer for exponent string: e+ZZZ */
int nseps; /* number of group separators with ' */
int nrepeats; /* number of repeats of the last group */
const char* grouping; /* locale specific numeric grouping rules */
int lead; /* sig figs before decimal or group sep */
long double ld;
double d;
int realsz; /* field size expanded by dprec, sign, etc */
int dprec; /* a copy of prec if [diouxX], 0 otherwise */
char ox[2]; /* space for 0x; ox[1] is either x, X, or \0 */
int prsize; /* max size of printed field */
int ret; /* return value accumulator */
char* decimal_point; /* locale specific decimal point */
int n2; /* XXX: for PRINTANDPAD */
char thousands_sep; /* locale specific thousands separator */
char buf[BUF]; /* buffer with space for digits of uintmax_t */
const char* xdigs;
int flag;
prec = pi->prec;
ox[1] = '\0';
sign = pi->showsign;
flag = 0;
ret = 0;
thousands_sep = *(localeconv()->thousands_sep);
grouping = NULL;
if (pi->alt) {
grouping = localeconv()->grouping;
}
decimal_point = localeconv()->decimal_point;
dprec = -1;
switch (pi->spec) {
case 'a':
case 'A':
if (pi->spec == 'a') {
ox[1] = 'x';
xdigs = __lowercase_hex;
expchar = 'p';
} else {
ox[1] = 'X';
xdigs = __uppercase_hex;
expchar = 'P';
}
if (prec >= 0) {
prec++;
}
if (pi->is_long_double) {
ld = *((long double*)arg[0]);
dtoaresult = cp =
__hldtoa(ld, xdigs, prec,
&expt, &signflag, &dtoaend);
} else {
d = *((double*)arg[0]);
dtoaresult = cp =
__hdtoa(d, xdigs, prec,
&expt, &signflag, &dtoaend);
}
if (prec < 0) {
prec = dtoaend - cp;
}
if (expt == INT_MAX) {
ox[1] = '\0';
}
goto fp_common;
case 'e':
case 'E':
expchar = pi->spec;
if (prec < 0) { /* account for digit before decpt */
prec = DEFPREC + 1;
} else {
prec++;
}
break;
case 'f':
case 'F':
expchar = '\0';
break;
case 'g':
case 'G':
expchar = pi->spec - ('g' - 'e');
if (prec == 0) {
prec = 1;
}
break;
default:
assert(pi->spec == 'f');
}
if (prec < 0) {
prec = DEFPREC;
}
if (pi->is_long_double) {
ld = *((long double*)arg[0]);
dtoaresult = cp =
__ldtoa(&ld, expchar ? 2 : 3, prec,
&expt, &signflag, &dtoaend);
} else {
d = *((double*)arg[0]);
dtoaresult = cp =
dtoa(d, expchar ? 2 : 3, prec,
&expt, &signflag, &dtoaend);
if (expt == 9999) {
expt = INT_MAX;
}
}
fp_common:
if (signflag) {
sign = '-';
}
if (expt == INT_MAX) { /* inf or nan */
if (*cp == 'N') {
cp = (pi->spec >= 'a') ? "nan" : "NAN";
sign = '\0';
} else {
cp = (pi->spec >= 'a') ? "inf" : "INF";
}
size = 3;
flag = 1;
goto here;
}
ndig = dtoaend - cp;
if (pi->spec == 'g' || pi->spec == 'G') {
if (expt > -4 && expt <= prec) {
/* Make %[gG] smell like %[fF] */
expchar = '\0';
if (pi->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 (!pi->alt) {
prec = ndig;
}
}
}
if (expchar) {
expsize = exponent(expstr, expt - 1, expchar);
size = expsize + prec;
if (prec > 1 || pi->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 || pi->alt) {
size += prec + 1;
}
if (grouping && expt > 0) {
/* space for thousands' grouping */
nseps = nrepeats = 0;
lead = expt;
while (*grouping != CHAR_MAX) {
if (lead <= *grouping) {
break;
}
lead -= *grouping;
if (*(grouping + 1)) {
nseps++;
grouping++;
} else {
nrepeats++;
}
}
size += nseps + nrepeats;
} else {
lead = expt;
}
}
here:
/*
* 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;
}
prsize = pi->width > realsz ? pi->width : realsz;
/* right-adjusting blank padding */
if (pi->pad != '0' && pi->left == 0) {
ret += __printf_pad(io, pi->width - realsz, 0);
}
/* prefix */
if (sign) {
ret += __printf_puts(io, &sign, 1);
}
if (ox[1]) { /* ox[1] is either x, X, or \0 */
ox[0] = '0';
ret += __printf_puts(io, ox, 2);
}
/* right-adjusting zero padding */
if (pi->pad == '0' && pi->left == 0) {
ret += __printf_pad(io, pi->width - realsz, 1);
}
/* leading zeroes from decimal precision */
ret += __printf_pad(io, dprec - size, 1);
if (flag) {
ret += __printf_puts(io, cp, size);
} else {
/* glue together f_p fragments */
if (!expchar) { /* %[fF] or sufficiently short %[gG] */
if (expt <= 0) {
ret += __printf_puts(io, "0", 1);
if (prec || pi->alt) {
ret += __printf_puts(io, decimal_point, 1);
}
ret += __printf_pad(io, -expt, 1);
/* already handled initial 0's */
prec += expt;
} else {
PRINTANDPAD(cp, dtoaend, lead, 1);
cp += lead;
if (grouping) {
while (nseps > 0 || nrepeats > 0) {
if (nrepeats > 0) {
nrepeats--;
} else {
grouping--;
nseps--;
}
ret += __printf_puts(io, &thousands_sep, 1);
PRINTANDPAD(cp, dtoaend,
*grouping, 1);
cp += *grouping;
}
if (cp > dtoaend) {
cp = dtoaend;
}
}
if (prec || pi->alt) {
ret += __printf_puts(io, decimal_point, 1);
}
}
PRINTANDPAD(cp, dtoaend, prec, 1);
} else { /* %[eE] or sufficiently long %[gG] */
if (prec > 1 || pi->alt) {
buf[0] = *cp++;
buf[1] = *decimal_point;
ret += __printf_puts(io, buf, 2);
ret += __printf_puts(io, cp, ndig - 1);
ret += __printf_pad(io, prec - ndig, 1);
} else { /* XeYYY */
ret += __printf_puts(io, cp, 1);
}
ret += __printf_puts(io, expstr, expsize);
}
}
/* left-adjusting padding (always blank) */
if (pi->left) {
ret += __printf_pad(io, pi->width - realsz, 0);
}
__printf_flush(io);
if (dtoaresult != NULL) {
freedtoa(dtoaresult);
}
return (ret);
}
int
__vfprintf(FILE *fp, const char *fmt0, __va_list ap)
{
char *fmt; /* format string */
int ch; /* character from fmt */
int n, n2; /* handy integers (short term usage) */
char *cp; /* 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; <0 for N/A */
char sign; /* sign prefix (' ', '+', '-', or \0) */
wchar_t wc;
mbstate_t ps;
#ifdef FLOATING_POINT
/*
* 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 expstr[MAXEXPDIG+2]; /* buffer for exponent string: e+ZZZ */
char *dtoaresult = NULL;
#endif
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 */
char buf[BUF]; /* buffer with space for digits of uintmax_t */
char 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 */
#ifdef PRINTF_WIDE_CHAR
char *convbuf; /* buffer for wide to multi-byte conversion */
#endif
/*
* 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 blanks[PADSIZE] =
{' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' '};
static char zeroes[PADSIZE] =
{'0','0','0','0','0','0','0','0','0','0','0','0','0','0','0','0'};
static const char xdigs_lower[16] = "0123456789abcdef";
static const char xdigs_upper[16] = "0123456789ABCDEF";
/*
* BEWARE, these `goto error' on error, and PAD uses `n'.
*/
#define PRINT(ptr, len) do { \
iovp->iov_base = (ptr); \
iovp->iov_len = (len); \
uio.uio_resid += (len); \
iovp++; \
if (++uio.uio_iovcnt >= NIOV) { \
if (__sprint(fp, &uio)) \
goto error; \
iovp = iov; \
} \
} while (0)
#define PAD(howmany, with) do { \
if ((n = (howmany)) > 0) { \
while (n > PADSIZE) { \
PRINT(with, PADSIZE); \
n -= PADSIZE; \
} \
PRINT(with, n); \
} \
} while (0)
#define PRINTANDPAD(p, ep, len, with) do { \
n2 = (ep) - (p); \
if (n2 > (len)) \
n2 = (len); \
if (n2 > 0) \
PRINT((p), n2); \
PAD((len) - (n2 > 0 ? n2 : 0), (with)); \
} while(0)
#define FLUSH() do { \
if (uio.uio_resid && __sprint(fp, &uio)) \
goto error; \
uio.uio_iovcnt = 0; \
iovp = iov; \
} while (0)
/*
* To extend shorts properly, we need both signed and unsigned
* argument extraction methods.
*/
#define SARG() \
((intmax_t)(flags&MAXINT ? GETARG(intmax_t) : \
flags&LLONGINT ? GETARG(long long) : \
flags&LONGINT ? GETARG(long) : \
flags&PTRINT ? GETARG(ptrdiff_t) : \
flags&SIZEINT ? GETARG(ssize_t) : \
flags&SHORTINT ? (short)GETARG(int) : \
flags&CHARINT ? (__signed char)GETARG(int) : \
GETARG(int)))
#define UARG() \
((uintmax_t)(flags&MAXINT ? GETARG(uintmax_t) : \
flags&LLONGINT ? GETARG(unsigned long long) : \
flags&LONGINT ? GETARG(unsigned long) : \
flags&PTRINT ? (uintptr_t)GETARG(ptrdiff_t) : /* XXX */ \
flags&SIZEINT ? GETARG(size_t) : \
flags&SHORTINT ? (unsigned short)GETARG(int) : \
flags&CHARINT ? (unsigned char)GETARG(int) : \
GETARG(unsigned int)))
/*
* Append a digit to a value and check for overflow.
*/
#define APPEND_DIGIT(val, dig) do { \
if ((val) > INT_MAX / 10) \
goto overflow; \
(val) *= 10; \
if ((val) > INT_MAX - to_digit((dig))) \
goto overflow; \
(val) += to_digit((dig)); \
} while (0)
/*
* Get * arguments, including the form *nn$. Preserve the nextarg
* that the argument can be gotten once the type is determined.
*/
#define GETASTER(val) \
n2 = 0; \
cp = fmt; \
while (is_digit(*cp)) { \
APPEND_DIGIT(n2, *cp); \
cp++; \
} \
if (*cp == '$') { \
int hold = nextarg; \
if (argtable == NULL) { \
argtable = statargtable; \
__find_arguments(fmt0, orgap, &argtable, &argtablesiz); \
} \
nextarg = n2; \
val = GETARG(int); \
nextarg = hold; \
fmt = ++cp; \
} else { \
val = GETARG(int); \
}
/*
* Get the argument indexed by nextarg. If the argument table is
* built, use it to get the argument. If its not, get the next
* argument (and arguments must be gotten sequentially).
*/
#define GETARG(type) \
((argtable != NULL) ? *((type*)(&argtable[nextarg++])) : \
(nextarg++, va_arg(ap, type)))
_SET_ORIENTATION(fp, -1);
/* sorry, fprintf(read_only_file, "") returns EOF, not 0 */
if (cantwrite(fp)) {
errno = EBADF;
return (EOF);
}
/* optimise fprintf(stderr) (and other unbuffered Unix files) */
if ((fp->_flags & (__SNBF|__SWR|__SRW)) == (__SNBF|__SWR) &&
fp->_file >= 0)
return (__sbprintf(fp, fmt0, ap));
fmt = (char *)fmt0;
argtable = NULL;
nextarg = 1;
va_copy(orgap, ap);
uio.uio_iov = iovp = iov;
uio.uio_resid = 0;
uio.uio_iovcnt = 0;
ret = 0;
#ifdef PRINTF_WIDE_CHAR
convbuf = NULL;
#endif
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';
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 == '$') {
nextarg = n;
if (argtable == NULL) {
argtable = statargtable;
__find_arguments(fmt0, orgap,
&argtable, &argtablesiz);
}
goto rflag;
}
prec = n;
goto reswitch;
case '0':
/*
* ``Note that 0 is taken as a flag, not as the
* beginning of a field width.''
* -- ANSI X3J11
*/
flags |= ZEROPAD;
goto rflag;
case '1': case '2': case '3': case '4':
case '5': case '6': case '7': case '8': case '9':
n = 0;
do {
APPEND_DIGIT(n, ch);
ch = *fmt++;
} while (is_digit(ch));
if (ch == '$') {
nextarg = n;
if (argtable == NULL) {
argtable = statargtable;
__find_arguments(fmt0, orgap,
&argtable, &argtablesiz);
}
goto rflag;
}
width = n;
goto reswitch;
#ifdef FLOATING_POINT
case 'L':
flags |= LONGDBL;
goto rflag;
#endif
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':
#ifdef PRINTF_WIDE_CHAR
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) {
fp->_flags |= __SERR;
errno = EILSEQ;
goto error;
}
cp = buf;
size = (int)mbseqlen;
} else {
#endif
*(cp = buf) = GETARG(int);
size = 1;
#ifdef PRINTF_WIDE_CHAR
}
#endif
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;
#ifdef FLOATING_POINT
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 - cp;
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 {
/*
* Non-MT-safe version
*/
int
__vfprintf(FILE *fp, locale_t locale, const char *fmt0, __va_list ap)
{
char *fmt; /* format string */
int ch; /* character from fmt */
int n, n2; /* handy integers (short term usage) */
char *cp; /* handy char pointer (short term usage) */
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 */
char sign; /* sign prefix (' ', '+', '-', or \0) */
struct grouping_state gs; /* thousands' grouping info */
#ifdef FLOATING_POINT
/*
* 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; /* locale specific decimal point */
int decpt_len; /* length of decimal_point */
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 ndig; /* actual number of digits returned by dtoa */
char expstr[MAXEXPDIG+2]; /* buffer for exponent string: e+ZZZ */
char *dtoaresult = NULL; /* buffer allocated by dtoa */
#endif
u_long ulval; /* integer arguments %[diouxX] */
uintmax_t ujval; /* %j, %ll, %q, %t, %z integers */
int base; /* base for [diouxX] conversion */
int dprec; /* a copy of prec if [diouxX], 0 otherwise */
int realsz; /* field size expanded by dprec, sign, etc */
int size; /* size of converted field or string */
const char *xdigs; /* digits for %[xX] conversion */
struct io_state io; /* I/O buffering state */
char buf[BUF]; /* buffer with space for digits of uintmax_t */
char 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];
int nextarg; /* 1-based argument index */
va_list orgap; /* original argument pointer */
char *convbuf; /* wide to multibyte conversion result */
static const char xdigs_lower[16] = "0123456789abcdef";
static const char xdigs_upper[16] = "0123456789ABCDEF";
/* BEWARE, these `goto error' on error. */
#define PRINT(ptr, len) { \
if (io_print(&io, (ptr), (len), locale)) \
goto error; \
}
#define PAD(howmany, with) { \
if (io_pad(&io, (howmany), (with), locale)) \
goto error; \
}
#define PRINTANDPAD(p, ep, len, with) { \
if (io_printandpad(&io, (p), (ep), (len), (with), locale)) \
goto error; \
}
#define FLUSH() { \
if (io_flush(&io, locale)) \
goto error; \
}
/*
* Get the argument indexed by nextarg. If the argument table is
* built, use it to get the argument. If its not, get the next
* argument (and arguments must be gotten sequentially).
*/
#define GETARG(type) \
((argtable != NULL) ? *((type*)(&argtable[nextarg++])) : \
(nextarg++, va_arg(ap, type)))
/*
* To extend shorts properly, we need both signed and unsigned
* argument extraction methods.
*/
#define SARG() \
(flags&LONGINT ? GETARG(long) : \
flags&SHORTINT ? (long)(short)GETARG(int) : \
flags&CHARINT ? (long)(signed char)GETARG(int) : \
(long)GETARG(int))
#define UARG() \
(flags&LONGINT ? GETARG(u_long) : \
flags&SHORTINT ? (u_long)(u_short)GETARG(int) : \
flags&CHARINT ? (u_long)(u_char)GETARG(int) : \
(u_long)GETARG(u_int))
#define INTMAX_SIZE (INTMAXT|SIZET|PTRDIFFT|LLONGINT)
#define SJARG() \
(flags&INTMAXT ? GETARG(intmax_t) : \
flags&SIZET ? (intmax_t)GETARG(ssize_t) : \
flags&PTRDIFFT ? (intmax_t)GETARG(ptrdiff_t) : \
(intmax_t)GETARG(long long))
#define UJARG() \
(flags&INTMAXT ? GETARG(uintmax_t) : \
flags&SIZET ? (uintmax_t)GETARG(size_t) : \
flags&PTRDIFFT ? (uintmax_t)GETARG(ptrdiff_t) : \
(uintmax_t)GETARG(unsigned long long))
/*
* Append a digit to a value and check for overflow.
*/
#define APPEND_DIGIT(val, dig) do { \
if ((val) > INT_MAX / 10) \
goto overflow; \
(val) *= 10; \
if ((val) > INT_MAX - to_digit((dig))) \
goto overflow; \
(val) += to_digit((dig)); \
} while (0)
/*
* Get * arguments, including the form *nn$. Preserve the nextarg
* that the argument can be gotten once the type is determined.
*/
#define GETASTER(val) \
n2 = 0; \
cp = fmt; \
while (is_digit(*cp)) { \
APPEND_DIGIT(n2, *cp); \
cp++; \
} \
if (*cp == '$') { \
int hold = nextarg; \
if (argtable == NULL) { \
argtable = statargtable; \
if (__find_arguments (fmt0, orgap, &argtable)) { \
ret = EOF; \
goto error; \
} \
} \
nextarg = n2; \
val = GETARG(int); \
nextarg = hold; \
fmt = ++cp; \
} else { \
val = GETARG(int); \
}
_SET_ORIENTATION(fp, -1);
/* sorry, fprintf(read_only_file, "") returns EOF, not 0 */
if (cantwrite(fp)) {
errno = EBADF;
return (EOF);
}
fmt = (char *)fmt0;
argtable = NULL;
nextarg = 1;
va_copy(orgap, ap);
io_init(&io, fp);
ret = 0;
#ifdef FLOATING_POINT
decimal_point = localeconv_l(locale)->decimal_point;
/* The overwhelmingly common case is decpt_len == 1. */
decpt_len = (decimal_point[1] == '\0' ? 1 : strlen(decimal_point));
#endif
#ifdef PRINTF_WIDE_CHAR
convbuf = NULL;
#endif
/*
* Scan the format for conversions (`%' character).
*/
for (;;) {
for (cp = fmt; (ch = *fmt) != '\0' && ch != '%'; fmt++)
/* void */;
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;
gs.grouping = NULL;
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 '*':
/*
* ``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 '\'':
flags |= GROUPING;
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 == '$') {
nextarg = n;
if (argtable == NULL) {
argtable = statargtable;
if (__find_arguments (fmt0, orgap,
&argtable)) {
ret = EOF;
goto error;
}
}
goto rflag;
}
prec = n;
goto reswitch;
case '0':
/*
* ``Note that 0 is taken as a flag, not as the
* beginning of a field width.''
* -- ANSI X3J11
*/
flags |= ZEROPAD;
goto rflag;
case '1': case '2': case '3': case '4':
case '5': case '6': case '7': case '8': case '9':
n = 0;
do {
APPEND_DIGIT(n, ch);
ch = *fmt++;
} while (is_digit(ch));
if (ch == '$') {
nextarg = n;
if (argtable == NULL) {
argtable = statargtable;
if (__find_arguments (fmt0, orgap,
&argtable)) {
ret = EOF;
goto error;
}
}
goto rflag;
}
width = n;
goto reswitch;
#ifdef FLOATING_POINT
case 'L':
flags |= LONGDBL;
goto rflag;
#endif
case 'h':
if (flags & SHORTINT) {
flags &= ~SHORTINT;
flags |= CHARINT;
} else {
flags |= SHORTINT;
}
goto rflag;
case 'j':
flags |= INTMAXT;
goto rflag;
case 'l':
if (flags & LONGINT) {
flags &= ~LONGINT;
flags |= LLONGINT;
} else {
flags |= LONGINT;
}
goto rflag;
case 'q':
flags |= LLONGINT; /* not necessarily */
goto rflag;
case 't':
flags |= PTRDIFFT;
goto rflag;
case 'z':
flags |= SIZET;
goto rflag;
case 'C':
flags |= LONGINT;
/*FALLTHROUGH*/
case 'c':
#ifdef PRINTF_WIDE_CHAR
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) {
fp->_flags |= __SERR;
errno = EILSEQ;
goto error;
}
cp = buf;
size = (int)mbseqlen;
} else {
#endif
*(cp = buf) = GETARG(int);
size = 1;
#ifdef PRINTF_WIDE_CHAR
}
#endif
sign = '\0';
break;
case 'D':
flags |= LONGINT;
/*FALLTHROUGH*/
case 'd':
case 'i':
if (flags & INTMAX_SIZE) {
ujval = SJARG();
if ((intmax_t)ujval < 0) {
ujval = -ujval;
sign = '-';
}
} else {
ulval = SARG();
if ((long)ulval < 0) {
ulval = -ulval;
sign = '-';
}
}
base = 10;
goto number;
#ifdef FLOATING_POINT
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 != NULL)
__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 - cp;
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 != NULL)
__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 {