summaryrefslogtreecommitdiffstats
path: root/lib/libc/stdio/vfprintf.c
diff options
context:
space:
mode:
Diffstat (limited to 'lib/libc/stdio/vfprintf.c')
-rw-r--r--lib/libc/stdio/vfprintf.c1037
1 files changed, 1037 insertions, 0 deletions
diff --git a/lib/libc/stdio/vfprintf.c b/lib/libc/stdio/vfprintf.c
new file mode 100644
index 0000000..ea47d36
--- /dev/null
+++ b/lib/libc/stdio/vfprintf.c
@@ -0,0 +1,1037 @@
+/*-
+ * Copyright (c) 1990, 1993
+ * The Regents of the University of California. All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * Chris Torek.
+ *
+ * Copyright (c) 2011 The FreeBSD Foundation
+ * All rights reserved.
+ * Portions of this software were developed by David Chisnall
+ * under sponsorship from the FreeBSD Foundation.
+ *
+ * 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.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+static char sccsid[] = "@(#)vfprintf.c 8.1 (Berkeley) 6/4/93";
+#endif /* LIBC_SCCS and not lint */
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+/*
+ * Actual printf innards.
+ *
+ * This code is large and complicated...
+ */
+
+#include "namespace.h"
+#include <sys/types.h>
+
+#include <ctype.h>
+#include <errno.h>
+#include <limits.h>
+#include <locale.h>
+#include <stddef.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <wchar.h>
+#include <printf.h>
+
+#include <stdarg.h>
+#include "xlocale_private.h"
+#include "un-namespace.h"
+
+#include "libc_private.h"
+#include "local.h"
+#include "fvwrite.h"
+#include "printflocal.h"
+
+static int __sprint(FILE *, struct __suio *, locale_t);
+static int __sbprintf(FILE *, locale_t, const char *, va_list) __printflike(3, 0)
+ __noinline;
+static char *__wcsconv(wchar_t *, int);
+
+#define CHAR char
+#include "printfcommon.h"
+
+struct grouping_state {
+ char *thousands_sep; /* locale-specific thousands separator */
+ int thousep_len; /* length of thousands_sep */
+ const char *grouping; /* locale-specific numeric grouping rules */
+ int lead; /* sig figs before decimal or group sep */
+ int nseps; /* number of group separators with ' */
+ int nrepeats; /* number of repeats of the last group */
+};
+
+/*
+ * Initialize the thousands' grouping state in preparation to print a
+ * number with ndigits digits. This routine returns the total number
+ * of bytes that will be needed.
+ */
+static int
+grouping_init(struct grouping_state *gs, int ndigits, locale_t loc)
+{
+ struct lconv *locale;
+
+ locale = localeconv_l(loc);
+ gs->grouping = locale->grouping;
+ gs->thousands_sep = locale->thousands_sep;
+ gs->thousep_len = strlen(gs->thousands_sep);
+
+ gs->nseps = gs->nrepeats = 0;
+ gs->lead = ndigits;
+ while (*gs->grouping != CHAR_MAX) {
+ if (gs->lead <= *gs->grouping)
+ break;
+ gs->lead -= *gs->grouping;
+ if (*(gs->grouping+1)) {
+ gs->nseps++;
+ gs->grouping++;
+ } else
+ gs->nrepeats++;
+ }
+ return ((gs->nseps + gs->nrepeats) * gs->thousep_len);
+}
+
+/*
+ * Print a number with thousands' separators.
+ */
+static int
+grouping_print(struct grouping_state *gs, struct io_state *iop,
+ const CHAR *cp, const CHAR *ep, locale_t locale)
+{
+ const CHAR *cp0 = cp;
+
+ if (io_printandpad(iop, cp, ep, gs->lead, zeroes, locale))
+ return (-1);
+ cp += gs->lead;
+ while (gs->nseps > 0 || gs->nrepeats > 0) {
+ if (gs->nrepeats > 0)
+ gs->nrepeats--;
+ else {
+ gs->grouping--;
+ gs->nseps--;
+ }
+ if (io_print(iop, gs->thousands_sep, gs->thousep_len, locale))
+ return (-1);
+ if (io_printandpad(iop, cp, ep, *gs->grouping, zeroes, locale))
+ return (-1);
+ cp += *gs->grouping;
+ }
+ if (cp > ep)
+ cp = ep;
+ return (cp - cp0);
+}
+
+/*
+ * Flush out all the vectors defined by the given uio,
+ * then reset it so that it can be reused.
+ */
+static int
+__sprint(FILE *fp, struct __suio *uio, locale_t locale)
+{
+ int err;
+
+ 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(FILE *fp, locale_t locale, const char *fmt, va_list ap)
+{
+ int ret;
+ FILE fake = FAKE_FILE;
+ unsigned char buf[BUFSIZ];
+
+ /* XXX This is probably not needed. */
+ if (prepwrite(fp) != 0)
+ return (EOF);
+
+ /* copy the important variables */
+ fake._flags = fp->_flags & ~__SNBF;
+ fake._file = fp->_file;
+ fake._cookie = fp->_cookie;
+ fake._write = fp->_write;
+ fake._orientation = fp->_orientation;
+ fake._mbstate = fp->_mbstate;
+
+ /* 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, locale, fmt, ap);
+ if (ret >= 0 && __fflush(&fake))
+ ret = EOF;
+ if (fake._flags & __SERR)
+ fp->_flags |= __SERR;
+ return (ret);
+}
+
+/*
+ * Convert a wide character string argument for the %ls format to a multibyte
+ * string representation. If not -1, prec specifies the maximum number of
+ * bytes to output, and also means that we can't assume that the wide char.
+ * string ends is null-terminated.
+ */
+static char *
+__wcsconv(wchar_t *wcsarg, int prec)
+{
+ static const mbstate_t initial;
+ mbstate_t mbs;
+ char buf[MB_LEN_MAX];
+ wchar_t *p;
+ char *convbuf;
+ size_t clen, nbytes;
+
+ /* Allocate space for the maximum number of bytes we could output. */
+ if (prec < 0) {
+ p = wcsarg;
+ mbs = initial;
+ nbytes = wcsrtombs(NULL, (const wchar_t **)&p, 0, &mbs);
+ if (nbytes == (size_t)-1)
+ return (NULL);
+ } else {
+ /*
+ * Optimisation: if the output precision is small enough,
+ * just allocate enough memory for the maximum instead of
+ * scanning the string.
+ */
+ if (prec < 128)
+ nbytes = prec;
+ else {
+ nbytes = 0;
+ p = wcsarg;
+ mbs = initial;
+ for (;;) {
+ clen = wcrtomb(buf, *p++, &mbs);
+ if (clen == 0 || clen == (size_t)-1 ||
+ nbytes + clen > prec)
+ break;
+ nbytes += clen;
+ }
+ }
+ }
+ if ((convbuf = malloc(nbytes + 1)) == NULL)
+ return (NULL);
+
+ /* Fill the output buffer. */
+ p = wcsarg;
+ mbs = initial;
+ if ((nbytes = wcsrtombs(convbuf, (const wchar_t **)&p,
+ nbytes, &mbs)) == (size_t)-1) {
+ free(convbuf);
+ return (NULL);
+ }
+ convbuf[nbytes] = '\0';
+ return (convbuf);
+}
+
+/*
+ * MT-safe version
+ */
+int
+vfprintf_l(FILE * __restrict fp, locale_t locale, const char * __restrict fmt0,
+ va_list ap)
+{
+ int ret;
+ FIX_LOCALE(locale);
+
+ FLOCKFILE(fp);
+ /* optimise fprintf(stderr) (and other unbuffered Unix files) */
+ if ((fp->_flags & (__SNBF|__SWR|__SRW)) == (__SNBF|__SWR) &&
+ fp->_file >= 0)
+ ret = __sbprintf(fp, locale, fmt0, ap);
+ else
+ ret = __vfprintf(fp, locale, fmt0, ap);
+ FUNLOCKFILE(fp);
+ return (ret);
+}
+int
+vfprintf(FILE * __restrict fp, const char * __restrict fmt0, va_list ap)
+{
+ return vfprintf_l(fp, __get_locale(), fmt0, ap);
+}
+
+/*
+ * The size of the buffer we use as scratch space for integer
+ * conversions, among other things. We need enough space to
+ * write a uintmax_t in octal (plus one byte).
+ */
+#if UINTMAX_MAX <= UINT64_MAX
+#define BUF 32
+#else
+#error "BUF must be large enough to format a uintmax_t"
+#endif
+
+/*
+ * 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 integer (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 */
+
+#ifndef NO_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; /* 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; /* 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 */
+ int prsize; /* max size of printed field */
+ 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))
+
+ /*
+ * Get * arguments, including the form *nn$. Preserve the nextarg
+ * that the argument can be gotten once the type is determined.
+ */
+#define GETASTER(val) \
+ n2 = 0; \
+ cp = fmt; \
+ while (is_digit(*cp)) { \
+ n2 = 10 * n2 + to_digit(*cp); \
+ cp++; \
+ } \
+ if (*cp == '$') { \
+ 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); \
+ }
+
+ if (__use_xprintf == 0 && getenv("USE_XPRINTF"))
+ __use_xprintf = 1;
+ if (__use_xprintf > 0)
+ return (__xvprintf(fp, fmt0, ap));
+
+ /* sorry, fprintf(read_only_file, "") returns EOF, not 0 */
+ if (prepwrite(fp) != 0)
+ return (EOF);
+
+ convbuf = NULL;
+ fmt = (char *)fmt0;
+ argtable = NULL;
+ nextarg = 1;
+ va_copy(orgap, ap);
+ io_init(&io, fp);
+ ret = 0;
+#ifndef NO_FLOATING_POINT
+ dtoaresult = NULL;
+ 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
+
+ /*
+ * Scan the format for conversions (`%' character).
+ */
+ for (;;) {
+ for (cp = fmt; (ch = *fmt) != '\0' && ch != '%'; fmt++)
+ /* void */;
+ if ((n = fmt - cp) != 0) {
+ if ((unsigned)ret + n > INT_MAX) {
+ ret = EOF;
+ errno = EOVERFLOW;
+ goto error;
+ }
+ PRINT(cp, n);
+ ret += n;
+ }
+ 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;
+ width = -width;
+ /* FALLTHROUGH */
+ case '-':
+ flags |= LADJUST;
+ goto rflag;
+ case '+':
+ sign = '+';
+ goto rflag;
+ case '\'':
+ flags |= GROUPING;
+ goto rflag;
+ case '.':
+ if ((ch = *fmt++) == '*') {
+ GETASTER (prec);
+ goto rflag;
+ }
+ prec = 0;
+ while (is_digit(ch)) {
+ prec = 10 * prec + to_digit(ch);
+ 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':
+ n = 0;
+ do {
+ n = 10 * n + to_digit(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;
+#ifndef NO_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':
+ if (flags & LONGINT) {
+ static const mbstate_t initial;
+ mbstate_t mbs;
+ size_t mbseqlen;
+
+ mbs = initial;
+ mbseqlen = wcrtomb(cp = buf,
+ (wchar_t)GETARG(wint_t), &mbs);
+ if (mbseqlen == (size_t)-1) {
+ fp->_flags |= __SERR;
+ goto error;
+ }
+ size = (int)mbseqlen;
+ } else {
+ *(cp = buf) = GETARG(int);
+ size = 1;
+ }
+ 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;
+#ifndef NO_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);
+ } else {
+ fparg.dbl = GETARG(double);
+ dtoaresult = cp =
+ __hdtoa(fparg.dbl, 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 = 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);
+ } else {
+ fparg.dbl = GETARG(double);
+ dtoaresult = cp =
+ dtoa(fparg.dbl, 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 = (ch >= 'a') ? "nan" : "NAN";
+ sign = '\0';
+ } else
+ cp = (ch >= 'a') ? "inf" : "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 += decpt_len;
+ } 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 + decpt_len;
+ if ((flags & GROUPING) && expt > 0)
+ size += grouping_init(&gs, expt, locale);
+ }
+ break;
+#endif /* !NO_FLOATING_POINT */
+ case 'n':
+ /*
+ * Assignment-like behavior is specified if the
+ * value overflows or is otherwise unrepresentable.
+ * C99 says to use `signed char' for %hhn conversions.
+ */
+ if (flags & LLONGINT)
+ *GETARG(long long *) = ret;
+ else if (flags & SIZET)
+ *GETARG(ssize_t *) = (ssize_t)ret;
+ else if (flags & PTRDIFFT)
+ *GETARG(ptrdiff_t *) = ret;
+ else if (flags & INTMAXT)
+ *GETARG(intmax_t *) = ret;
+ else if (flags & LONGINT)
+ *GETARG(long *) = ret;
+ else if (flags & SHORTINT)
+ *GETARG(short *) = ret;
+ else if (flags & CHARINT)
+ *GETARG(signed char *) = ret;
+ else
+ *GETARG(int *) = ret;
+ continue; /* no output */
+ case 'O':
+ flags |= LONGINT;
+ /*FALLTHROUGH*/
+ case 'o':
+ if (flags & INTMAX_SIZE)
+ ujval = UJARG();
+ else
+ ulval = UARG();
+ base = 8;
+ 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
+ */
+ ujval = (uintmax_t)(uintptr_t)GETARG(void *);
+ base = 16;
+ xdigs = xdigs_lower;
+ flags = flags | INTMAXT;
+ ox[1] = 'x';
+ goto nosign;
+ case 'S':
+ flags |= LONGINT;
+ /*FALLTHROUGH*/
+ case 's':
+ if (flags & LONGINT) {
+ wchar_t *wcp;
+
+ if (convbuf != NULL)
+ free(convbuf);
+ if ((wcp = GETARG(wchar_t *)) == NULL)
+ cp = "(null)";
+ else {
+ convbuf = __wcsconv(wcp, prec);
+ if (convbuf == NULL) {
+ fp->_flags |= __SERR;
+ goto error;
+ }
+ cp = convbuf;
+ }
+ } else if ((cp = GETARG(char *)) == NULL)
+ cp = "(null)";
+ size = (prec >= 0) ? strnlen(cp, prec) : strlen(cp);
+ sign = '\0';
+ break;
+ case 'U':
+ flags |= LONGINT;
+ /*FALLTHROUGH*/
+ case 'u':
+ if (flags & INTMAX_SIZE)
+ ujval = UJARG();
+ else
+ ulval = UARG();
+ base = 10;
+ goto nosign;
+ case 'X':
+ xdigs = xdigs_upper;
+ goto hex;
+ case 'x':
+ xdigs = xdigs_lower;
+hex:
+ if (flags & INTMAX_SIZE)
+ ujval = UJARG();
+ else
+ ulval = UARG();
+ base = 16;
+ /* leading 0x/X only if non-zero */
+ if (flags & ALT &&
+ (flags & INTMAX_SIZE ? ujval != 0 : ulval != 0))
+ ox[1] = ch;
+
+ flags &= ~GROUPING;
+ /* 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
+ *
+ * ``The C Standard is clear enough as is. The call
+ * printf("%#.0o", 0) should print 0.''
+ * -- Defect Report #151
+ */
+ cp = buf + BUF;
+ if (flags & INTMAX_SIZE) {
+ if (ujval != 0 || prec != 0 ||
+ (flags & ALT && base == 8))
+ cp = __ujtoa(ujval, cp, base,
+ flags & ALT, xdigs);
+ } else {
+ if (ulval != 0 || prec != 0 ||
+ (flags & ALT && base == 8))
+ cp = __ultoa(ulval, cp, base,
+ flags & ALT, xdigs);
+ }
+ size = buf + BUF - cp;
+ if (size > BUF) /* should never happen */
+ abort();
+ if ((flags & GROUPING) && size != 0)
+ size += grouping_init(&gs, size, locale);
+ 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;
+
+ prsize = width > realsz ? width : realsz;
+ if ((unsigned)ret + prsize > INT_MAX) {
+ ret = EOF;
+ errno = EOVERFLOW;
+ goto error;
+ }
+
+ /* 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);
+
+ /* the string or number proper */
+#ifndef NO_FLOATING_POINT
+ if ((flags & FPT) == 0) {
+#endif
+ /* leading zeroes from decimal precision */
+ PAD(dprec - size, zeroes);
+ if (gs.grouping) {
+ if (grouping_print(&gs, &io, cp, buf+BUF, locale) < 0)
+ goto error;
+ } else {
+ PRINT(cp, size);
+ }
+#ifndef NO_FLOATING_POINT
+ } else { /* glue together f_p fragments */
+ if (!expchar) { /* %[fF] or sufficiently short %[gG] */
+ if (expt <= 0) {
+ PRINT(zeroes, 1);
+ if (prec || flags & ALT)
+ PRINT(decimal_point,decpt_len);
+ PAD(-expt, zeroes);
+ /* already handled initial 0's */
+ prec += expt;
+ } else {
+ if (gs.grouping) {
+ n = grouping_print(&gs, &io,
+ cp, dtoaend, locale);
+ if (n < 0)
+ goto error;
+ cp += n;
+ } else {
+ PRINTANDPAD(cp, dtoaend,
+ expt, zeroes);
+ cp += expt;
+ }
+ if (prec || flags & ALT)
+ PRINT(decimal_point,decpt_len);
+ }
+ PRINTANDPAD(cp, dtoaend, prec, zeroes);
+ } else { /* %[eE] or sufficiently long %[gG] */
+ if (prec > 1 || flags & ALT) {
+ PRINT(cp++, 1);
+ PRINT(decimal_point, decpt_len);
+ PRINT(cp, ndig-1);
+ PAD(prec - ndig, zeroes);
+ } else /* XeYYY */
+ PRINT(cp, 1);
+ PRINT(expstr, expsize);
+ }
+ }
+#endif
+ /* left-adjusting padding (always blank) */
+ if (flags & LADJUST)
+ PAD(width - realsz, blanks);
+
+ /* finally, adjust ret */
+ ret += prsize;
+
+ FLUSH(); /* copy out the I/O vectors */
+ }
+done:
+ FLUSH();
+error:
+ va_end(orgap);
+#ifndef NO_FLOATING_POINT
+ if (dtoaresult != NULL)
+ freedtoa(dtoaresult);
+#endif
+ if (convbuf != NULL)
+ free(convbuf);
+ if (__sferror(fp))
+ ret = EOF;
+ if ((argtable != NULL) && (argtable != statargtable))
+ free (argtable);
+ return (ret);
+ /* NOTREACHED */
+}
+
OpenPOWER on IntegriCloud