/*- * 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. * * 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. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the University of * California, Berkeley and its contributors. * 4. 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 __FBSDID("$FreeBSD$"); /* * Actual printf innards. * * This code is large and complicated... */ #include "namespace.h" #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" /* Define FLOATING_POINT to get floating point. */ #define FLOATING_POINT union arg { int intarg; u_int uintarg; long longarg; u_long ulongarg; long long longlongarg; unsigned long long ulonglongarg; ptrdiff_t ptrdiffarg; size_t sizearg; intmax_t intmaxarg; uintmax_t uintmaxarg; void *pvoidarg; char *pchararg; signed char *pschararg; short *pshortarg; int *pintarg; long *plongarg; long long *plonglongarg; ptrdiff_t *pptrdiffarg; size_t *psizearg; intmax_t *pintmaxarg; #ifdef FLOATING_POINT double doublearg; long double longdoublearg; #endif wint_t wintarg; wchar_t *pwchararg; }; /* * Type ids for argument type table. */ enum typeid { T_UNUSED, TP_SHORT, T_INT, T_U_INT, TP_INT, T_LONG, T_U_LONG, TP_LONG, T_LLONG, T_U_LLONG, TP_LLONG, T_PTRDIFFT, TP_PTRDIFFT, T_SIZET, TP_SIZET, T_INTMAXT, T_UINTMAXT, TP_INTMAXT, TP_VOID, TP_CHAR, TP_SCHAR, T_DOUBLE, T_LONG_DOUBLE, T_WINT, TP_WCHAR }; static int __sprint(FILE *, struct __suio *); static int __sbprintf(FILE *, const char *, va_list) __printflike(2, 0); static char *__ujtoa(uintmax_t, char *, int, int, char *, int, char, const char *); static char *__ultoa(u_long, char *, int, int, char *, int, char, const char *); static char *__wcsconv(wchar_t *, int); static void __find_arguments(const char *, va_list, union arg **); static void __grow_type_table(int, enum typeid **, int *); /* * 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) { 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, const char *fmt, va_list ap) { int ret; FILE fake; unsigned char buf[BUFSIZ]; /* copy the important variables */ fake._flags = fp->_flags & ~__SNBF; fake._file = fp->_file; fake._cookie = fp->_cookie; fake._write = fp->_write; fake._extra = fp->_extra; /* 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, fmt, ap); if (ret >= 0 && __fflush(&fake)) ret = EOF; if (fake._flags & __SERR) fp->_flags |= __SERR; return (ret); } /* * Macros for converting digits to letters and vice versa */ #define to_digit(c) ((c) - '0') #define is_digit(c) ((unsigned)to_digit(c) <= 9) #define to_char(n) ((n) + '0') /* * Convert an unsigned long to ASCII for printf purposes, returning * a pointer to the first character of the string representation. * Octal numbers can be forced to have a leading zero; hex numbers * use the given digits. */ static char * __ultoa(u_long val, char *endp, int base, int octzero, char *xdigs, int needgrp, char thousep, const char *grp) { char *cp = endp; long sval; int ndig; /* * Handle the three cases separately, in the hope of getting * better/faster code. */ switch (base) { case 10: if (val < 10) { /* many numbers are 1 digit */ *--cp = to_char(val); return (cp); } ndig = 0; /* * On many machines, unsigned arithmetic is harder than * signed arithmetic, so we do at most one unsigned mod and * divide; this is sufficient to reduce the range of * the incoming value to where signed arithmetic works. */ if (val > LONG_MAX) { *--cp = to_char(val % 10); ndig++; sval = val / 10; } else sval = val; do { *--cp = to_char(sval % 10); ndig++; /* * If (*grp == CHAR_MAX) then no more grouping * should be performed. */ if (needgrp && ndig == *grp && *grp != CHAR_MAX && sval > 9) { *--cp = thousep; ndig = 0; /* * If (*(grp+1) == '\0') then we have to * use *grp character (last grouping rule) * for all next cases */ if (*(grp+1) != '\0') grp++; } sval /= 10; } while (sval != 0); break; case 8: do { *--cp = to_char(val & 7); val >>= 3; } while (val); if (octzero && *cp != '0') *--cp = '0'; break; case 16: do { *--cp = xdigs[val & 15]; val >>= 4; } while (val); break; default: /* oops */ abort(); } return (cp); } /* Identical to __ultoa, but for intmax_t. */ static char * __ujtoa(uintmax_t val, char *endp, int base, int octzero, char *xdigs, int needgrp, char thousep, const char *grp) { char *cp = endp; intmax_t sval; int ndig; /* quick test for small values; __ultoa is typically much faster */ /* (perhaps instead we should run until small, then call __ultoa?) */ if (val <= ULONG_MAX) return (__ultoa((u_long)val, endp, base, octzero, xdigs, needgrp, thousep, grp)); switch (base) { case 10: if (val < 10) { *--cp = to_char(val % 10); return (cp); } ndig = 0; if (val > INTMAX_MAX) { *--cp = to_char(val % 10); ndig++; sval = val / 10; } else sval = val; do { *--cp = to_char(sval % 10); ndig++; /* * If (*grp == CHAR_MAX) then no more grouping * should be performed. */ if (needgrp && *grp != CHAR_MAX && ndig == *grp && sval > 9) { *--cp = thousep; ndig = 0; /* * If (*(grp+1) == '\0') then we have to * use *grp character (last grouping rule) * for all next cases */ if (*(grp+1) != '\0') grp++; } sval /= 10; } while (sval != 0); break; case 8: do { *--cp = to_char(val & 7); val >>= 3; } while (val); if (octzero && *cp != '0') *--cp = '0'; break; case 16: do { *--cp = xdigs[val & 15]; val >>= 4; } while (val); break; default: abort(); } return (cp); } /* * Convert a wide character string argument for the %ls format to a multibyte * 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 wide char. string ends in a null character. */ static char * __wcsconv(wchar_t *wcsarg, int prec) { char buf[MB_LEN_MAX]; wchar_t *p; char *convbuf, *mbp; size_t clen, nbytes; mbstate_t mbs; /* * Determine the number of bytes to output and allocate space for * the output. */ memset(&mbs, 0, sizeof(mbs)); if (prec >= 0) { nbytes = 0; p = wcsarg; for (;;) { clen = wcrtomb(buf, *p++, &mbs); if (clen == 0 || clen == (size_t)-1 || nbytes + clen > prec) break; nbytes += clen; } } else { p = wcsarg; nbytes = wcsrtombs(NULL, (const wchar_t **)&p, 0, &mbs); if (nbytes == (size_t)-1) return (NULL); } if ((convbuf = malloc(nbytes + 1)) == NULL) return (NULL); /* * Fill the output buffer with the multibyte representations of as * many wide characters as will fit. */ mbp = convbuf; p = wcsarg; memset(&mbs, 0, sizeof(mbs)); while (mbp - convbuf < nbytes) { clen = wcrtomb(mbp, *p++, &mbs); if (clen == 0 || clen == (size_t)-1) break; mbp += clen; } *mbp = '\0'; if (clen == (size_t)-1) return (NULL); return (convbuf); } /* * MT-safe version */ int vfprintf(FILE * __restrict fp, const char * __restrict fmt0, va_list ap) { int ret; FLOCKFILE(fp); ret = __vfprintf(fp, fmt0, ap); FUNLOCKFILE(fp); return (ret); } #ifdef FLOATING_POINT #include #include "floatio.h" #define BUF ((MAXEXP*2)+MAXFRACT+1) /* + decimal point */ #define DEFPREC 6 static char *cvt(double, int, int, char *, int *, int, int *, char **); static int exponent(char *, int, int); #else /* no FLOATING_POINT */ #define BUF 136 #endif /* FLOATING_POINT */ #define STATIC_ARG_TBL_SIZE 8 /* Size of static argument table. */ /* * Flags used during conversion. */ #define ALT 0x001 /* alternate form */ #define HEXPREFIX 0x002 /* add 0x or 0X prefix */ #define LADJUST 0x004 /* left adjustment */ #define LONGDBL 0x008 /* long double */ #define LONGINT 0x010 /* long integer */ #define LLONGINT 0x020 /* long long integer */ #define SHORTINT 0x040 /* short integer */ #define ZEROPAD 0x080 /* zero (as opposed to blank) pad */ #define FPT 0x100 /* Floating point number */ #define GROUPING 0x200 /* use grouping ("'" flag) */ /* C99 additional size modifiers: */ #define SIZET 0x400 /* size_t */ #define PTRDIFFT 0x800 /* ptrdiff_t */ #define INTMAXT 0x1000 /* intmax_t */ #define CHARINT 0x2000 /* print char using int format */ /* * Non-MT-safe version */ int __vfprintf(FILE *fp, 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) */ 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 (%.3d), or -1 */ char sign; /* sign prefix (' ', '+', '-', or \0) */ char thousands_sep; /* locale specific thousands separator */ const char *grouping; /* locale specific numeric grouping rules */ #ifdef FLOATING_POINT char *decimal_point; /* locale specific decimal point */ char softsign; /* temporary negative sign for floats */ double _double; /* double precision arguments %[eEfgG] */ int expt; /* integer value of exponent */ int expsize; /* character count for expstr */ int ndig; /* actual number of digits returned by cvt */ char expstr[7]; /* buffer for exponent string */ 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 */ 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]; /* space for %c, %[diouxX], %[eEfFgG] */ char 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 */ char *convbuf; /* wide to multibyte conversion result */ /* * 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'}; /* * BEWARE, these `goto error' on error, and PAD uses `n'. */ #define PRINT(ptr, len) { \ 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; \ } \ } #define PAD(howmany, with) { \ if ((n = (howmany)) > 0) { \ while (n > PADSIZE) { \ PRINT(with, PADSIZE); \ n -= PADSIZE; \ } \ PRINT(with, n); \ } \ } #define FLUSH() { \ if (uio.uio_resid && __sprint(fp, &uio)) \ goto error; \ uio.uio_iovcnt = 0; \ iovp = iov; \ } /* * 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(size_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; \ __find_arguments (fmt0, orgap, &argtable); \ } \ nextarg = n2; \ val = GETARG (int); \ nextarg = hold; \ fmt = ++cp; \ } else { \ val = GETARG (int); \ } thousands_sep = '\0'; grouping = NULL; convbuf = NULL; #ifdef FLOATING_POINT dtoaresult = NULL; decimal_point = localeconv()->decimal_point; #endif /* sorry, fprintf(read_only_file, "") returns EOF, not 0 */ if (cantwrite(fp)) 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; /* * 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; goto error; } PRINT(cp, n); ret += n; } if (ch == '\0') goto done; fmt++; /* skip over '%' */ flags = 0; dprec = 0; width = 0; prec = -1; sign = '\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; thousands_sep = *(localeconv()->thousands_sep); grouping = localeconv()->grouping; goto rflag; case '.': if ((ch = *fmt++) == '*') { GETASTER (n); prec = n < 0 ? -1 : n; goto rflag; } n = 0; while (is_digit(ch)) { n = 10 * n + to_digit(ch); ch = *fmt++; } prec = n < 0 ? -1 : 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 { n = 10 * n + to_digit(ch); ch = *fmt++; } while (is_digit(ch)); if (ch == '$') { nextarg = n; if (argtable == NULL) { argtable = statargtable; __find_arguments (fmt0, orgap, &argtable); } 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': if (flags & LONGINT) { mbstate_t mbs; size_t mbseqlen; memset(&mbs, 0, sizeof(mbs)); mbseqlen = wcrtomb(cp = buf, (wchar_t)GETARG(wint_t), &mbs); if (mbseqlen == (size_t)-1) 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; #ifdef FLOATING_POINT #ifdef HEXFLOAT case 'a': case 'A': #endif case 'e': case 'E': /*- * Grouping apply to %i, %d, %u, %f, %F, %g, %G * conversion specifiers only. For other conversions * behavior is undefined. * -- POSIX */ flags &= ~GROUPING; /*FALLTHROUGH*/ case 'f': case 'F': goto fp_begin; case 'g': case 'G': if (prec == 0) prec = 1; fp_begin: if (prec == -1) prec = DEFPREC; if (flags & LONGDBL) /* XXX this loses precision. */ _double = (double)GETARG(long double); else _double = GETARG(double); /* do this before tricky precision changes */ if (isinf(_double)) { if (_double < 0) sign = '-'; if (isupper(ch)) cp = "INF"; else cp = "inf"; size = 3; break; } if (isnan(_double)) { if (isupper(ch)) cp = "NAN"; else cp = "nan"; size = 3; break; } flags |= FPT; if (dtoaresult != NULL) { free(dtoaresult); dtoaresult = NULL; } cp = cvt(_double, prec, flags, &softsign, &expt, ch, &ndig, &dtoaresult); if (ch == 'g' || ch == 'G') { if (expt <= -4 || expt > prec) ch = (ch == 'g') ? 'e' : 'E'; else ch = 'g'; } if (ch == 'e' || ch == 'E') { --expt; expsize = exponent(expstr, expt, ch); size = expsize + ndig; if (ndig > 1 || flags & ALT) ++size; } else if (ch == 'f' || ch == 'F') { if (expt > 0) { size = expt; if (prec || flags & ALT) size += prec + 1; } else /* "0.X" */ size = prec + 2; } else if (expt >= ndig) { /* fixed g fmt */ size = expt; if (flags & ALT) ++size; } else size = ndig + (expt > 0 ? 1 : 2 - expt); if (softsign) sign = '-'; break; #endif /* 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 = "0123456789abcdef"; flags = flags | INTMAXT | HEXPREFIX; ch = '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) goto error; cp = convbuf; } } else if ((cp = GETARG(char *)) == NULL) cp = "(null)"; if (prec >= 0) { /* * can't use strlen; can only look for the * NUL in the first `prec' characters, and * strlen() will go further. */ char *p = memchr(cp, 0, (size_t)prec); if (p != NULL) { size = p - cp; if (size > prec) size = prec; } else size = prec; } else size = 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 = "0123456789ABCDEF"; goto hex; case 'x': xdigs = "0123456789abcdef"; 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)) flags |= HEXPREFIX; 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 */ cp = buf + BUF; if (flags & INTMAX_SIZE) { if (ujval != 0 || prec != 0) cp = __ujtoa(ujval, cp, base, flags & ALT, xdigs, flags & GROUPING, thousands_sep, grouping); } else { if (ulval != 0 || prec != 0) cp = __ultoa(ulval, cp, base, flags & ALT, xdigs, flags & GROUPING, thousands_sep, grouping); } size = buf + BUF - cp; 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++; else if (flags & HEXPREFIX) realsz += 2; prsize = width > realsz ? width : realsz; if ((unsigned)ret + prsize > INT_MAX) { ret = EOF; goto error; } /* right-adjusting blank padding */ if ((flags & (LADJUST|ZEROPAD)) == 0) PAD(width - realsz, blanks); /* prefix */ if (sign) { PRINT(&sign, 1); } else if (flags & HEXPREFIX) { ox[0] = '0'; ox[1] = ch; 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 */ #ifdef FLOATING_POINT if ((flags & FPT) == 0) { PRINT(cp, size); } else { /* glue together f_p fragments */ if (ch >= 'f') { /* 'f' or 'g' */ if (_double == 0) { /* kludge for __dtoa irregularity */ PRINT("0", 1); if (expt < ndig || (flags & ALT) != 0) { PRINT(decimal_point, 1); PAD(ndig - 1, zeroes); } } else if (expt <= 0) { PRINT("0", 1); PRINT(decimal_point, 1); PAD(-expt, zeroes); PRINT(cp, ndig); } else if (expt >= ndig) { PRINT(cp, ndig); PAD(expt - ndig, zeroes); if (flags & ALT) PRINT(decimal_point, 1); } else { PRINT(cp, expt); cp += expt; PRINT(decimal_point, 1); PRINT(cp, ndig-expt); } } else { /* 'e' or 'E' */ if (ndig > 1 || flags & ALT) { ox[0] = *cp++; ox[1] = *decimal_point; PRINT(ox, 2); if (_double) { PRINT(cp, ndig-1); } else /* 0.[0..] */ /* __dtoa irregularity */ PAD(ndig - 1, zeroes); } else /* XeYYY */ PRINT(cp, 1); PRINT(expstr, expsize); } } #else PRINT(cp, size); #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: #ifdef FLOATING_POINT if (dtoaresult != NULL) free(dtoaresult); #endif if (convbuf != NULL) free(convbuf); if (__sferror(fp)) ret = EOF; if ((argtable != NULL) && (argtable != statargtable)) free (argtable); return (ret); /* NOTREACHED */ } /* * Find all arguments when a positional parameter is encountered. Returns a * table, indexed by argument number, of pointers to each arguments. The * initial argument table should be an array of STATIC_ARG_TBL_SIZE entries. * It will be replaces with a malloc-ed one if it overflows. */ static void __find_arguments (const char *fmt0, va_list ap, union arg **argtable) { 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 width; /* width from format (%8d), or 0 */ enum typeid *typetable; /* table of types */ enum typeid stattypetable [STATIC_ARG_TBL_SIZE]; int tablesize; /* current size of type table */ int tablemax; /* largest used index in table */ int nextarg; /* 1-based argument index */ /* * Add an argument type to the table, expanding if necessary. */ #define ADDTYPE(type) \ ((nextarg >= tablesize) ? \ __grow_type_table(nextarg, &typetable, &tablesize) : 0, \ (nextarg > tablemax) ? tablemax = nextarg : 0, \ typetable[nextarg++] = type) #define ADDSARG() \ ((flags&INTMAXT) ? ADDTYPE(T_INTMAXT) : \ ((flags&SIZET) ? ADDTYPE(T_SIZET) : \ ((flags&PTRDIFFT) ? ADDTYPE(T_PTRDIFFT) : \ ((flags&LLONGINT) ? ADDTYPE(T_LLONG) : \ ((flags&LONGINT) ? ADDTYPE(T_LONG) : ADDTYPE(T_INT)))))) #define ADDUARG() \ ((flags&INTMAXT) ? ADDTYPE(T_UINTMAXT) : \ ((flags&SIZET) ? ADDTYPE(T_SIZET) : \ ((flags&PTRDIFFT) ? ADDTYPE(T_PTRDIFFT) : \ ((flags&LLONGINT) ? ADDTYPE(T_U_LLONG) : \ ((flags&LONGINT) ? ADDTYPE(T_U_LONG) : ADDTYPE(T_U_INT)))))) /* * Add * arguments to the type array. */ #define ADDASTER() \ n2 = 0; \ cp = fmt; \ while (is_digit(*cp)) { \ n2 = 10 * n2 + to_digit(*cp); \ cp++; \ } \ if (*cp == '$') { \ int hold = nextarg; \ nextarg = n2; \ ADDTYPE (T_INT); \ nextarg = hold; \ fmt = ++cp; \ } else { \ ADDTYPE (T_INT); \ } fmt = (char *)fmt0; typetable = stattypetable; tablesize = STATIC_ARG_TBL_SIZE; tablemax = 0; nextarg = 1; memset (typetable, T_UNUSED, STATIC_ARG_TBL_SIZE); /* * Scan the format for conversions (`%' character). */ for (;;) { for (cp = fmt; (ch = *fmt) != '\0' && ch != '%'; fmt++) /* void */; if (ch == '\0') goto done; fmt++; /* skip over '%' */ flags = 0; width = 0; rflag: ch = *fmt++; reswitch: switch (ch) { case ' ': case '#': goto rflag; case '*': ADDASTER (); goto rflag; case '-': case '+': case '\'': goto rflag; case '.': if ((ch = *fmt++) == '*') { ADDASTER (); goto rflag; } while (is_digit(ch)) { ch = *fmt++; } goto reswitch; case '0': 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; 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': if (flags & LONGINT) ADDTYPE(T_WINT); else ADDTYPE(T_INT); break; case 'D': flags |= LONGINT; /*FALLTHROUGH*/ case 'd': case 'i': ADDSARG(); break; #ifdef FLOATING_POINT #ifdef HEXFLOAT case 'a': case 'A': #endif case 'e': case 'E': case 'f': case 'g': case 'G': if (flags & LONGDBL) ADDTYPE(T_LONG_DOUBLE); else ADDTYPE(T_DOUBLE); break; #endif /* FLOATING_POINT */ case 'n': if (flags & INTMAXT) ADDTYPE(TP_INTMAXT); else if (flags & PTRDIFFT) ADDTYPE(TP_PTRDIFFT); else if (flags & SIZET) ADDTYPE(TP_SIZET); else if (flags & LLONGINT) ADDTYPE(TP_LLONG); else if (flags & LONGINT) ADDTYPE(TP_LONG); else if (flags & SHORTINT) ADDTYPE(TP_SHORT); else if (flags & CHARINT) ADDTYPE(TP_SCHAR); else ADDTYPE(TP_INT); continue; /* no output */ case 'O': flags |= LONGINT; /*FALLTHROUGH*/ case 'o': ADDUARG(); break; case 'p': ADDTYPE(TP_VOID); break; case 'S': flags |= LONGINT; /*FALLTHROUGH*/ case 's': if (flags & LONGINT) ADDTYPE(TP_WCHAR); else ADDTYPE(TP_CHAR); break; case 'U': flags |= LONGINT; /*FALLTHROUGH*/ case 'u': case 'X': case 'x': ADDUARG(); break; default: /* "%?" prints ?, unless ? is NUL */ if (ch == '\0') goto done; break; } } done: /* * Build the argument table. */ if (tablemax >= STATIC_ARG_TBL_SIZE) { *argtable = (union arg *) malloc (sizeof (union arg) * (tablemax + 1)); } (*argtable) [0].intarg = 0; for (n = 1; n <= tablemax; n++) { switch (typetable [n]) { case T_UNUSED: /* whoops! */ (*argtable) [n].intarg = va_arg (ap, int); break; case TP_SCHAR: (*argtable) [n].pschararg = va_arg (ap, signed char *); break; case TP_SHORT: (*argtable) [n].pshortarg = va_arg (ap, short *); break; case T_INT: (*argtable) [n].intarg = va_arg (ap, int); break; case T_U_INT: (*argtable) [n].uintarg = va_arg (ap, unsigned int); break; case TP_INT: (*argtable) [n].pintarg = va_arg (ap, int *); break; case T_LONG: (*argtable) [n].longarg = va_arg (ap, long); break; case T_U_LONG: (*argtable) [n].ulongarg = va_arg (ap, unsigned long); break; case TP_LONG: (*argtable) [n].plongarg = va_arg (ap, long *); break; case T_LLONG: (*argtable) [n].longlongarg = va_arg (ap, long long); break; case T_U_LLONG: (*argtable) [n].ulonglongarg = va_arg (ap, unsigned long long); break; case TP_LLONG: (*argtable) [n].plonglongarg = va_arg (ap, long long *); break; case T_PTRDIFFT: (*argtable) [n].ptrdiffarg = va_arg (ap, ptrdiff_t); break; case TP_PTRDIFFT: (*argtable) [n].pptrdiffarg = va_arg (ap, ptrdiff_t *); break; case T_SIZET: (*argtable) [n].sizearg = va_arg (ap, size_t); break; case TP_SIZET: (*argtable) [n].psizearg = va_arg (ap, ssize_t *); break; case T_INTMAXT: (*argtable) [n].intmaxarg = va_arg (ap, intmax_t); break; case T_UINTMAXT: (*argtable) [n].uintmaxarg = va_arg (ap, uintmax_t); break; case TP_INTMAXT: (*argtable) [n].pintmaxarg = va_arg (ap, intmax_t *); break; #ifdef FLOATING_POINT case T_DOUBLE: (*argtable) [n].doublearg = va_arg (ap, double); break; case T_LONG_DOUBLE: (*argtable) [n].longdoublearg = va_arg (ap, long double); break; #endif case TP_CHAR: (*argtable) [n].pchararg = va_arg (ap, char *); break; case TP_VOID: (*argtable) [n].pvoidarg = va_arg (ap, void *); break; case T_WINT: (*argtable) [n].wintarg = va_arg (ap, wint_t); break; case TP_WCHAR: (*argtable) [n].pwchararg = va_arg (ap, wchar_t *); break; } } if ((typetable != NULL) && (typetable != stattypetable)) free (typetable); } /* * Increase the size of the type table. */ static void __grow_type_table (int nextarg, enum typeid **typetable, int *tablesize) { enum typeid *const oldtable = *typetable; const int oldsize = *tablesize; enum typeid *newtable; int newsize = oldsize * 2; if (newsize < nextarg + 1) newsize = nextarg + 1; if (oldsize == STATIC_ARG_TBL_SIZE) { if ((newtable = malloc(newsize)) == NULL) abort(); /* XXX handle better */ bcopy(oldtable, newtable, oldsize); } else { if ((newtable = reallocf(oldtable, newsize)) == NULL) abort(); /* XXX handle better */ } memset(&newtable[oldsize], T_UNUSED, newsize - oldsize); *typetable = newtable; *tablesize = newsize; } #ifdef FLOATING_POINT extern char *__dtoa(double, int, int, int *, int *, char **, char **); static char * cvt(double value, int ndigits, int flags, char *sign, int *decpt, int ch, int *length, char **dtoaresultp) { int mode, dsgn; char *digits, *bp, *rve; if (ch == 'f') mode = 3; /* ndigits after the decimal point */ else { /* * To obtain ndigits after the decimal point for the 'e' * and 'E' formats, round to ndigits + 1 significant * figures. */ if (ch == 'e' || ch == 'E') ndigits++; mode = 2; /* ndigits significant digits */ } digits = __dtoa(value, mode, ndigits, decpt, &dsgn, &rve, dtoaresultp); *sign = dsgn != 0; if ((ch != 'g' && ch != 'G') || flags & ALT) { /* print trailing zeros */ bp = digits + ndigits; if (ch == 'f') { if (*digits == '0' && value) *decpt = -ndigits + 1; bp += *decpt; } if (value == 0) /* kludge for __dtoa irregularity */ rve = bp; while (rve < bp) *rve++ = '0'; } *length = rve - digits; return (digits); } static int exponent(char *p0, int exp, int fmtch) { char *p, *t; char expbuf[MAXEXP]; p = p0; *p++ = fmtch; if (exp < 0) { exp = -exp; *p++ = '-'; } else *p++ = '+'; t = expbuf + MAXEXP; if (exp > 9) { do { *--t = to_char(exp % 10); } while ((exp /= 10) > 9); *--t = to_char(exp); for (; t < expbuf + MAXEXP; *p++ = *t++); } else { *p++ = '0'; *p++ = to_char(exp); } return (p - p0); } #endif /* FLOATING_POINT */