/*- * SPDX-License-Identifier: BSD-3-Clause * * 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 * * 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. */ /* * Actual wprintf innards. * * Avoid making gratuitous changes to this source file; it should be kept * as close as possible to vfprintf.c for ease of maintenance. */ #include "namespace.h" #include #include #include #include #include #include #include #include #include #include #include #include #include #include "un-namespace.h" #include "libc_private.h" #include "local.h" #include "fvwrite.h" #include "printflocal.h" #include "xlocale_private.h" static int __sprint(FILE *, struct __suio *, locale_t); static int __sbprintf(FILE *, locale_t, const wchar_t *, va_list) __noinline; static wint_t __xfputwc(wchar_t, FILE *, locale_t); static wchar_t *__mbsconv(char *, int); #define CHAR wchar_t #include "printfcommon.h" struct grouping_state { wchar_t thousands_sep; /* locale-specific thousands separator */ 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 */ }; static const mbstate_t initial_mbs; static inline wchar_t get_decpt(locale_t locale) { mbstate_t mbs; wchar_t decpt; int nconv; mbs = initial_mbs; nconv = mbrtowc(&decpt, localeconv_l(locale)->decimal_point, MB_CUR_MAX, &mbs); if (nconv == (size_t)-1 || nconv == (size_t)-2) decpt = '.'; /* failsafe */ return (decpt); } static inline wchar_t get_thousep(locale_t locale) { mbstate_t mbs; wchar_t thousep; int nconv; mbs = initial_mbs; nconv = mbrtowc(&thousep, localeconv_l(locale)->thousands_sep, MB_CUR_MAX, &mbs); if (nconv == (size_t)-1 || nconv == (size_t)-2) thousep = '\0'; /* failsafe */ return (thousep); } /* * Initialize the thousands' grouping state in preparation to print a * number with ndigits digits. This routine returns the total number * of wide characters that will be printed. */ static int grouping_init(struct grouping_state *gs, int ndigits, locale_t locale) { gs->grouping = localeconv_l(locale)->grouping; gs->thousands_sep = get_thousep(locale); 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); } /* * 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, 1, 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. * * XXX The fact that we do this a character at a time and convert to a * multibyte character sequence even if the destination is a wide * string eclipses the benefits of buffering. */ static int __sprint(FILE *fp, struct __suio *uio, locale_t locale) { struct __siov *iov; wchar_t *p; int i, len; iov = uio->uio_iov; for (; uio->uio_resid != 0; uio->uio_resid -= len, iov++) { p = (wchar_t *)iov->iov_base; len = iov->iov_len; for (i = 0; i < len; i++) { if (__xfputwc(p[i], fp, locale) == WEOF) return (-1); } } uio->uio_iovcnt = 0; return (0); } /* * 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 wchar_t *fmt, va_list ap) { int ret; FILE fake; 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 = __vfwprintf(&fake, locale, fmt, ap); if (ret >= 0 && __fflush(&fake)) ret = WEOF; if (fake._flags & __SERR) fp->_flags |= __SERR; return (ret); } /* * Like __fputwc, but handles fake string (__SSTR) files properly. * File must already be locked. */ static wint_t __xfputwc(wchar_t wc, FILE *fp, locale_t locale) { mbstate_t mbs; char buf[MB_LEN_MAX]; struct __suio uio; struct __siov iov; size_t len; if ((fp->_flags & __SSTR) == 0) return (__fputwc(wc, fp, locale)); mbs = initial_mbs; if ((len = wcrtomb(buf, wc, &mbs)) == (size_t)-1) { fp->_flags |= __SERR; return (WEOF); } uio.uio_iov = &iov; uio.uio_resid = len; uio.uio_iovcnt = 1; iov.iov_base = buf; iov.iov_len = len; return (__sfvwrite(fp, &uio) != EOF ? (wint_t)wc : WEOF); } /* * Convert a multibyte character string argument for the %s format to a wide * string representation. ``prec'' specifies the maximum number of bytes * to output. If ``prec'' is greater than or equal to zero, we can't assume * that the multibyte char. string ends in a null character. */ static wchar_t * __mbsconv(char *mbsarg, int prec) { mbstate_t mbs; wchar_t *convbuf, *wcp; const char *p; size_t insize, nchars, nconv; if (mbsarg == NULL) return (NULL); /* * Supplied argument is a multibyte string; convert it to wide * characters first. */ if (prec >= 0) { /* * String is not guaranteed to be NUL-terminated. Find the * number of characters to print. */ p = mbsarg; insize = nchars = nconv = 0; mbs = initial_mbs; while (nchars != (size_t)prec) { nconv = mbrlen(p, MB_CUR_MAX, &mbs); if (nconv == 0 || nconv == (size_t)-1 || nconv == (size_t)-2) break; p += nconv; nchars++; insize += nconv; } if (nconv == (size_t)-1 || nconv == (size_t)-2) return (NULL); } else { insize = strlen(mbsarg); nconv = 0; } /* * Allocate buffer for the result and perform the conversion, * converting at most `size' bytes of the input multibyte string to * wide characters for printing. */ convbuf = malloc((insize + 1) * sizeof(*convbuf)); if (convbuf == NULL) return (NULL); wcp = convbuf; p = mbsarg; mbs = initial_mbs; while (insize != 0) { nconv = mbrtowc(wcp, p, insize, &mbs); if (nconv == 0 || nconv == (size_t)-1 || nconv == (size_t)-2) break; wcp++; p += nconv; insize -= nconv; } if (nconv == (size_t)-1 || nconv == (size_t)-2) { free(convbuf); return (NULL); } *wcp = L'\0'; return (convbuf); } /* * MT-safe version */ int vfwprintf_l(FILE * __restrict fp, locale_t locale, const wchar_t * __restrict fmt0, va_list ap) { int ret; FIX_LOCALE(locale); FLOCKFILE_CANCELSAFE(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 = __vfwprintf(fp, locale, fmt0, ap); FUNLOCKFILE_CANCELSAFE(); return (ret); } int vfwprintf(FILE * __restrict fp, const wchar_t * __restrict fmt0, va_list ap) { return vfwprintf_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 __vfwprintf(FILE *fp, locale_t locale, const wchar_t *fmt0, va_list ap) { wchar_t *fmt; /* format string */ wchar_t ch; /* character from fmt */ int n, n2; /* handy integer (short term usage) */ wchar_t *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 */ wchar_t 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 */ wchar_t decimal_point; /* locale specific 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 */ wchar_t 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 */ wchar_t buf[BUF]; /* buffer with space for digits of uintmax_t */ wchar_t ox[2]; /* space for 0x hex-prefix */ 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 */ wchar_t *convbuf; /* multibyte to wide conversion result */ int savserr; static const char xdigs_lower[16] = "0123456789abcdef"; static const char xdigs_upper[16] = "0123456789ABCDEF"; /* BEWARE, these `goto error' on error. */ #define PRINT(ptr, len) do { \ if (io_print(&io, (ptr), (len), locale)) \ goto error; \ } while (0) #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_warguments (fmt0, orgap, &argtable)) { \ ret = EOF; \ goto error; \ } \ } \ nextarg = n2; \ val = GETARG (int); \ nextarg = hold; \ fmt = ++cp; \ } else { \ val = GETARG (int); \ } /* sorry, fwprintf(read_only_file, L"") returns WEOF, not 0 */ if (prepwrite(fp) != 0) { errno = EBADF; return (EOF); } savserr = fp->_flags & __SERR; fp->_flags &= ~__SERR; convbuf = NULL; fmt = (wchar_t *)fmt0; argtable = NULL; nextarg = 1; va_copy(orgap, ap); io_init(&io, fp); ret = 0; #ifndef NO_FLOATING_POINT decimal_point = get_decpt(locale); #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_warguments (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 'w': /* * Fixed-width integer types. On all platforms we * support, int8_t is equivalent to char, int16_t * is equivalent to short, int32_t is equivalent * to int, int64_t is equivalent to long long int. * Furthermore, int_fast8_t, int_fast16_t and * int_fast32_t are equivalent to int, and * int_fast64_t is equivalent to long long int. */ flags &= ~(CHARINT|SHORTINT|LONGINT|LLONGINT|INTMAXT); if (fmt[0] == 'f') { flags |= FASTINT; fmt++; } else { flags &= ~FASTINT; } if (fmt[0] == '8') { if (!(flags & FASTINT)) flags |= CHARINT; else /* no flag set = 32 */ ; fmt += 1; } else if (fmt[0] == '1' && fmt[1] == '6') { if (!(flags & FASTINT)) flags |= SHORTINT; else /* no flag set = 32 */ ; fmt += 2; } else if (fmt[0] == '3' && fmt[1] == '2') { /* no flag set = 32 */ ; fmt += 2; } else if (fmt[0] == '6' && fmt[1] == '4') { flags |= LLONGINT; fmt += 2; } else { if (flags & FASTINT) { flags &= ~FASTINT; fmt--; } goto invalid; } goto rflag; case 'z': flags |= SIZET; goto rflag; case 'B': case 'b': if (flags & INTMAX_SIZE) ujval = UJARG(); else ulval = UARG(); base = 2; /* leading 0b/B only if non-zero */ if (flags & ALT && (flags & INTMAX_SIZE ? ujval != 0 : ulval != 0)) ox[1] = ch; goto nosign; break; case 'C': flags |= LONGINT; /*FALLTHROUGH*/ case 'c': if (flags & LONGINT) *(cp = buf) = (wchar_t)GETARG(wint_t); else *(cp = buf) = (wchar_t)btowc(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 (flags & LONGDBL) { fparg.ldbl = GETARG(long double); dtoaresult = __hldtoa(fparg.ldbl, xdigs, prec, &expt, &signflag, &dtoaend); } else { fparg.dbl = GETARG(double); dtoaresult = __hdtoa(fparg.dbl, xdigs, prec, &expt, &signflag, &dtoaend); } if (prec < 0) prec = dtoaend - dtoaresult; if (expt == INT_MAX) ox[1] = '\0'; if (convbuf != NULL) free(convbuf); ndig = dtoaend - dtoaresult; cp = convbuf = __mbsconv(dtoaresult, -1); freedtoa(dtoaresult); 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 (convbuf != NULL) free(convbuf); if (flags & LONGDBL) { fparg.ldbl = GETARG(long double); dtoaresult = __ldtoa(&fparg.ldbl, expchar ? 2 : 3, prec, &expt, &signflag, &dtoaend); } else { fparg.dbl = GETARG(double); dtoaresult = dtoa(fparg.dbl, expchar ? 2 : 3, prec, &expt, &signflag, &dtoaend); if (expt == 9999) expt = INT_MAX; } ndig = dtoaend - dtoaresult; cp = convbuf = __mbsconv(dtoaresult, -1); freedtoa(dtoaresult); fp_common: if (signflag) sign = '-'; if (expt == INT_MAX) { /* inf or nan */ if (*cp == 'N') { cp = (ch >= 'a') ? L"nan" : L"NAN"; sign = '\0'; } else cp = (ch >= 'a') ? L"inf" : L"INF"; size = 3; flags &= ~ZEROPAD; break; } flags |= FPT; 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; 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) { if ((cp = GETARG(wchar_t *)) == NULL) cp = L"(null)"; } else { char *mbp; if (convbuf != NULL) free(convbuf); if ((mbp = GETARG(char *)) == NULL) cp = L"(null)"; else { convbuf = __mbsconv(mbp, prec); if (convbuf == NULL) { fp->_flags |= __SERR; goto error; } cp = convbuf; } } size = (prec >= 0) ? wcsnlen(cp, prec) : wcslen(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; invalid: /* 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, 1); PAD(-expt, zeroes); /* already handled initial 0's */ prec += expt; } else { if (gs.grouping) { n = grouping_print(&gs, &io, cp, convbuf + ndig, locale); if (n < 0) goto error; cp += n; } else { PRINTANDPAD(cp, convbuf + ndig, expt, zeroes); cp += expt; } if (prec || flags & ALT) PRINT(&decimal_point, 1); } PRINTANDPAD(cp, convbuf + ndig, 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); } } #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); if (convbuf != NULL) free(convbuf); if (__sferror(fp)) ret = EOF; else fp->_flags |= savserr; if ((argtable != NULL) && (argtable != statargtable)) free (argtable); return (ret); /* NOTREACHED */ }