int
__printf_out(struct __printf_io *io, const struct printf_info *pi, const void *ptr, int len)
{
int ret = 0;
if ((!pi->left) && pi->width > len)
ret += __printf_pad(io, pi->width - len, pi->pad == '0');
ret += __printf_puts(io, ptr, len);
if (pi->left && pi->width > len)
ret += __printf_pad(io, pi->width - len, pi->pad == '0');
return (ret);
}
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);
}