/* $OpenBSD: vfprintf.c,v 1.47 2008/05/16 20:42:52 millert Exp $ */ /*- * Copyright (c) 1990 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. 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 printf innards. * * This code is large and complicated... */ #include #include #include #include #include #include #include #include #include #include #include #include "local.h" #include "fvwrite.h" union arg { int intarg; unsigned int uintarg; long longarg; unsigned long ulongarg; long long longlongarg; unsigned long long ulonglongarg; ptrdiff_t ptrdiffarg; size_t sizearg; size_t ssizearg; 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; ssize_t *pssizearg; intmax_t *pintmaxarg; #ifdef FLOATING_POINT double doublearg; long double longdoublearg; #endif }; static int __find_arguments(const char *fmt0, va_list ap, union arg **argtable, size_t *argtablesiz); static int __grow_type_table(unsigned char **typetable, int *tablesize); /* * 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; struct __sfileext fakeext; unsigned char buf[BUFSIZ]; _FILEEXT_SETUP(&fake, &fakeext); /* copy the important variables */ fake._flags = fp->_flags & ~__SNBF; fake._file = fp->_file; fake._cookie = fp->_cookie; fake._write = fp->_write; /* 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); } #ifdef FLOATING_POINT #include #include #include "floatio.h" #define BUF (MAXEXP+MAXFRACT+1) /* + decimal point */ #define DEFPREC 6 extern char *__dtoa(double, int, int, int *, int *, char **); extern void __freedtoa(char *); static char *cvt(double, int, int, char *, int *, int, int *); static int exponent(char *, int, int); #else /* no FLOATING_POINT */ #define BUF 40 #endif /* FLOATING_POINT */ #define STATIC_ARG_TBL_SIZE 8 /* Size of static argument table. */ /* * 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') /* * Flags used during conversion. */ #define ALT 0x0001 /* alternate form */ #define HEXPREFIX 0x0002 /* add 0x or 0X prefix */ #define LADJUST 0x0004 /* left adjustment */ #define LONGDBL 0x0008 /* long double; unimplemented */ #define LONGINT 0x0010 /* long integer */ #define LLONGINT 0x0020 /* long long integer */ #define SHORTINT 0x0040 /* short integer */ #define ZEROPAD 0x0080 /* zero (as opposed to blank) pad */ #define FPT 0x0100 /* Floating point number */ #define PTRINT 0x0200 /* (unsigned) ptrdiff_t */ #define SIZEINT 0x0400 /* (signed) size_t */ #define CHARINT 0x0800 /* 8 bit integer */ #define MAXINT 0x1000 /* largest integer size (intmax_t) */ int vfprintf(FILE *fp, const char *fmt0, __va_list ap) { char *fmt; /* format string */ int ch; /* character from fmt */ int n, n2; /* handy integers (short term usage) */ char *cp; /* handy char pointer (short term usage) */ struct __siov *iovp; /* for PRINT macro */ int flags; /* flags as above */ int ret; /* return value accumulator */ int width; /* width from format (%8d), or 0 */ int prec; /* precision from format (%.3d), or -1 */ char sign; /* sign prefix (' ', '+', '-', or \0) */ wchar_t wc; mbstate_t ps; #ifdef FLOATING_POINT char *decimal_point = localeconv()->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 = NULL; #endif uintmax_t _umax; /* integer arguments %[diouxX] */ enum { OCT, DEC, HEX } base;/* base for [diouxX] conversion */ int dprec; /* a copy of prec if [diouxX], 0 otherwise */ int realsz; /* field size expanded by dprec */ int size; /* size of converted field or string */ 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], %[eEfgG] */ char ox[2]; /* space for 0x hex-prefix */ union arg *argtable; /* args, built due to positional arg */ union arg statargtable[STATIC_ARG_TBL_SIZE]; size_t argtablesiz; int nextarg; /* 1-based argument index */ va_list orgap; /* original argument pointer */ /* * 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) do { \ iovp->iov_base = (ptr); \ iovp->iov_len = (len); \ uio.uio_resid += (len); \ iovp++; \ if (++uio.uio_iovcnt >= NIOV) { \ if (__sprint(fp, &uio)) \ goto error; \ iovp = iov; \ } \ } while (0) #define PAD(howmany, with) do { \ if ((n = (howmany)) > 0) { \ while (n > PADSIZE) { \ PRINT(with, PADSIZE); \ n -= PADSIZE; \ } \ PRINT(with, n); \ } \ } while (0) #define FLUSH() do { \ if (uio.uio_resid && __sprint(fp, &uio)) \ goto error; \ uio.uio_iovcnt = 0; \ iovp = iov; \ } while (0) /* * To extend shorts properly, we need both signed and unsigned * argument extraction methods. */ #define SARG() \ ((intmax_t)(flags&MAXINT ? GETARG(intmax_t) : \ flags&LLONGINT ? GETARG(long long) : \ flags&LONGINT ? GETARG(long) : \ flags&PTRINT ? GETARG(ptrdiff_t) : \ flags&SIZEINT ? GETARG(ssize_t) : \ flags&SHORTINT ? (short)GETARG(int) : \ flags&CHARINT ? (__signed char)GETARG(int) : \ GETARG(int))) #define UARG() \ ((uintmax_t)(flags&MAXINT ? GETARG(uintmax_t) : \ flags&LLONGINT ? GETARG(unsigned long long) : \ flags&LONGINT ? GETARG(unsigned long) : \ flags&PTRINT ? (uintptr_t)GETARG(ptrdiff_t) : /* XXX */ \ flags&SIZEINT ? GETARG(size_t) : \ flags&SHORTINT ? (unsigned short)GETARG(int) : \ flags&CHARINT ? (unsigned char)GETARG(int) : \ GETARG(unsigned int))) /* * Append a digit to a value and check for overflow. */ #define APPEND_DIGIT(val, dig) do { \ if ((val) > INT_MAX / 10) \ goto overflow; \ (val) *= 10; \ if ((val) > INT_MAX - to_digit((dig))) \ goto overflow; \ (val) += to_digit((dig)); \ } while (0) /* * Get * arguments, including the form *nn$. Preserve the nextarg * that the argument can be gotten once the type is determined. */ #define GETASTER(val) \ n2 = 0; \ cp = fmt; \ while (is_digit(*cp)) { \ APPEND_DIGIT(n2, *cp); \ cp++; \ } \ if (*cp == '$') { \ int hold = nextarg; \ if (argtable == NULL) { \ argtable = statargtable; \ __find_arguments(fmt0, orgap, &argtable, &argtablesiz); \ } \ nextarg = n2; \ val = GETARG(int); \ nextarg = hold; \ fmt = ++cp; \ } else { \ val = GETARG(int); \ } /* * Get the argument indexed by nextarg. If the argument table is * built, use it to get the argument. If its not, get the next * argument (and arguments must be gotten sequentially). */ #define GETARG(type) \ ((argtable != NULL) ? *((type*)(&argtable[nextarg++])) : \ (nextarg++, va_arg(ap, type))) _SET_ORIENTATION(fp, -1); /* sorry, fprintf(read_only_file, "") returns EOF, not 0 */ if (cantwrite(fp)) { errno = EBADF; return (EOF); } /* optimise fprintf(stderr) (and other unbuffered Unix files) */ if ((fp->_flags & (__SNBF|__SWR|__SRW)) == (__SNBF|__SWR) && fp->_file >= 0) return (__sbprintf(fp, fmt0, ap)); fmt = (char *)fmt0; argtable = NULL; nextarg = 1; va_copy(orgap, ap); uio.uio_iov = iovp = iov; uio.uio_resid = 0; uio.uio_iovcnt = 0; ret = 0; memset(&ps, 0, sizeof(ps)); /* * Scan the format for conversions (`%' character). */ for (;;) { cp = fmt; while ((n = mbrtowc(&wc, fmt, MB_CUR_MAX, &ps)) > 0) { fmt += n; if (wc == '%') { fmt--; break; } } if (fmt != cp) { ptrdiff_t m = fmt - cp; if (m < 0 || m > INT_MAX - ret) goto overflow; PRINT(cp, m); ret += m; } if (n <= 0) goto done; fmt++; /* skip over '%' */ flags = 0; dprec = 0; width = 0; prec = -1; sign = '\0'; rflag: ch = *fmt++; reswitch: switch (ch) { case ' ': /* * ``If the space and + flags both appear, the space * flag will be ignored.'' * -- ANSI X3J11 */ if (!sign) sign = ' '; goto rflag; case '#': flags |= ALT; goto rflag; case '*': /* * ``A negative field width argument is taken as a * - flag followed by a positive field width.'' * -- ANSI X3J11 * They don't exclude field widths read from args. */ GETASTER(width); if (width >= 0) goto rflag; if (width == INT_MIN) goto overflow; width = -width; /* FALLTHROUGH */ case '-': flags |= LADJUST; goto rflag; case '+': sign = '+'; goto rflag; case '.': if ((ch = *fmt++) == '*') { GETASTER(n); prec = n < 0 ? -1 : n; goto rflag; } n = 0; while (is_digit(ch)) { APPEND_DIGIT(n, ch); ch = *fmt++; } if (ch == '$') { nextarg = n; if (argtable == NULL) { argtable = statargtable; __find_arguments(fmt0, orgap, &argtable, &argtablesiz); } goto rflag; } prec = n; goto reswitch; case '0': /* * ``Note that 0 is taken as a flag, not as the * beginning of a field width.'' * -- ANSI X3J11 */ flags |= ZEROPAD; goto rflag; case '1': case '2': case '3': case '4': case '5': case '6': case '7': case '8': case '9': n = 0; do { APPEND_DIGIT(n, ch); ch = *fmt++; } while (is_digit(ch)); if (ch == '$') { nextarg = n; if (argtable == NULL) { argtable = statargtable; __find_arguments(fmt0, orgap, &argtable, &argtablesiz); } goto rflag; } width = n; goto reswitch; #ifdef FLOATING_POINT case 'L': flags |= LONGDBL; goto rflag; #endif case 'h': if (*fmt == 'h') { fmt++; flags |= CHARINT; } else { flags |= SHORTINT; } goto rflag; case 'j': flags |= MAXINT; goto rflag; case 'l': if (*fmt == 'l') { fmt++; flags |= LLONGINT; } else { flags |= LONGINT; } goto rflag; case 'q': flags |= LLONGINT; goto rflag; case 't': flags |= PTRINT; goto rflag; case 'z': flags |= SIZEINT; goto rflag; case 'c': *(cp = buf) = GETARG(int); size = 1; sign = '\0'; break; case 'D': flags |= LONGINT; /*FALLTHROUGH*/ case 'd': case 'i': _umax = SARG(); if ((intmax_t)_umax < 0) { _umax = -_umax; sign = '-'; } base = DEC; goto number; #ifdef FLOATING_POINT case 'e': case 'E': case 'f': case 'g': case 'G': if (prec == -1) { prec = DEFPREC; } else if ((ch == 'g' || ch == 'G') && prec == 0) { prec = 1; } if (flags & LONGDBL) { _double = (double) GETARG(long double); } else { _double = GETARG(double); } /* do this before tricky precision changes */ if (isinf(_double)) { if (_double < 0) sign = '-'; cp = "Inf"; size = 3; break; } if (isnan(_double)) { cp = "NaN"; size = 3; break; } flags |= FPT; if (dtoaresult) __freedtoa(dtoaresult); dtoaresult = cp = cvt(_double, prec, flags, &softsign, &expt, ch, &ndig); if (ch == 'g' || ch == 'G') { if (expt <= -4 || expt > prec) ch = (ch == 'g') ? 'e' : 'E'; else ch = 'g'; } if (ch <= 'e') { /* 'e' or 'E' fmt */ --expt; expsize = exponent(expstr, expt, ch); size = expsize + ndig; if (ndig > 1 || flags & ALT) ++size; } else if (ch == 'f') { /* f fmt */ 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': if (flags & LLONGINT) *GETARG(long long *) = ret; else if (flags & LONGINT) *GETARG(long *) = ret; else if (flags & SHORTINT) *GETARG(short *) = ret; else if (flags & CHARINT) *GETARG(__signed char *) = ret; else if (flags & PTRINT) *GETARG(ptrdiff_t *) = ret; else if (flags & SIZEINT) *GETARG(ssize_t *) = ret; else if (flags & MAXINT) *GETARG(intmax_t *) = ret; else *GETARG(int *) = ret; continue; /* no output */ case 'O': flags |= LONGINT; /*FALLTHROUGH*/ case 'o': _umax = UARG(); base = OCT; 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 */ /* NOSTRICT */ _umax = (u_long)GETARG(void *); base = HEX; xdigs = "0123456789abcdef"; flags |= HEXPREFIX; ch = 'x'; goto nosign; case 's': 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, prec); size = p ? (p - cp) : prec; } else { size_t len; if ((len = strlen(cp)) > INT_MAX) goto overflow; size = (int)len; } sign = '\0'; break; case 'U': flags |= LONGINT; /*FALLTHROUGH*/ case 'u': _umax = UARG(); base = DEC; goto nosign; case 'X': xdigs = "0123456789ABCDEF"; goto hex; case 'x': xdigs = "0123456789abcdef"; hex: _umax = UARG(); base = HEX; /* leading 0x/X only if non-zero */ if (flags & ALT && _umax != 0) flags |= HEXPREFIX; /* 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 (_umax != 0 || prec != 0) { /* * Unsigned mod is hard, and unsigned mod * by a constant is easier than that by * a variable; hence this switch. */ switch (base) { case OCT: do { *--cp = to_char(_umax & 7); _umax >>= 3; } while (_umax); /* handle octal leading 0 */ if (flags & ALT && *cp != '0') *--cp = '0'; break; case DEC: /* many numbers are 1 digit */ while (_umax >= 10) { *--cp = to_char(_umax % 10); _umax /= 10; } *--cp = to_char(_umax); break; case HEX: do { *--cp = xdigs[_umax & 15]; _umax >>= 4; } while (_umax); break; default: cp = "bug in vfprintf: bad base"; size = strlen(cp); goto skipsize; } } size = buf + BUF - cp; skipsize: 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; /* 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(".", 1); } else { PRINT(cp, expt); cp += expt; PRINT(".", 1); PRINT(cp, ndig-expt); } } else { /* 'e' or 'E' */ if (ndig > 1 || flags & ALT) { ox[0] = *cp++; ox[1] = '.'; 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 */ if (width < realsz) width = realsz; if (width > INT_MAX - ret) goto overflow; ret += width; FLUSH(); /* copy out the I/O vectors */ } done: FLUSH(); error: va_end(orgap); if (__sferror(fp)) ret = -1; goto finish; overflow: errno = ENOMEM; ret = -1; finish: #ifdef FLOATING_POINT if (dtoaresult) __freedtoa(dtoaresult); #endif if (argtable != NULL && argtable != statargtable) { munmap(argtable, argtablesiz); argtable = NULL; } return (ret); } /* * Type ids for argument type table. */ #define T_UNUSED 0 #define T_SHORT 1 #define T_U_SHORT 2 #define TP_SHORT 3 #define T_INT 4 #define T_U_INT 5 #define TP_INT 6 #define T_LONG 7 #define T_U_LONG 8 #define TP_LONG 9 #define T_LLONG 10 #define T_U_LLONG 11 #define TP_LLONG 12 #define T_DOUBLE 13 #define T_LONG_DOUBLE 14 #define TP_CHAR 15 #define TP_VOID 16 #define T_PTRINT 17 #define TP_PTRINT 18 #define T_SIZEINT 19 #define T_SSIZEINT 20 #define TP_SSIZEINT 21 #define T_MAXINT 22 #define T_MAXUINT 23 #define TP_MAXINT 24 #define T_CHAR 25 #define T_U_CHAR 26 /* * 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 replaced with a mmap-ed one if it overflows (malloc cannot be * used since we are attempting to make snprintf thread safe, and alloca is * problematic since we have nested functions..) */ static int __find_arguments(const char *fmt0, va_list ap, union arg **argtable, size_t *argtablesiz) { 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 */ unsigned char *typetable; /* table of types */ unsigned char 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 */ int ret = 0; /* return value */ wchar_t wc; mbstate_t ps; /* * Add an argument type to the table, expanding if necessary. */ #define ADDTYPE(type) \ ((nextarg >= tablesize) ? \ __grow_type_table(&typetable, &tablesize) : 0, \ (nextarg > tablemax) ? tablemax = nextarg : 0, \ typetable[nextarg++] = type) #define ADDSARG() \ ((flags&MAXINT) ? ADDTYPE(T_MAXINT) : \ ((flags&PTRINT) ? ADDTYPE(T_PTRINT) : \ ((flags&SIZEINT) ? ADDTYPE(T_SSIZEINT) : \ ((flags&LLONGINT) ? ADDTYPE(T_LLONG) : \ ((flags&LONGINT) ? ADDTYPE(T_LONG) : \ ((flags&SHORTINT) ? ADDTYPE(T_SHORT) : \ ((flags&CHARINT) ? ADDTYPE(T_CHAR) : ADDTYPE(T_INT)))))))) #define ADDUARG() \ ((flags&MAXINT) ? ADDTYPE(T_MAXUINT) : \ ((flags&PTRINT) ? ADDTYPE(T_PTRINT) : \ ((flags&SIZEINT) ? ADDTYPE(T_SIZEINT) : \ ((flags&LLONGINT) ? ADDTYPE(T_U_LLONG) : \ ((flags&LONGINT) ? ADDTYPE(T_U_LONG) : \ ((flags&SHORTINT) ? ADDTYPE(T_U_SHORT) : \ ((flags&CHARINT) ? ADDTYPE(T_U_CHAR) : ADDTYPE(T_U_INT)))))))) /* * Add * arguments to the type array. */ #define ADDASTER() \ n2 = 0; \ cp = fmt; \ while (is_digit(*cp)) { \ APPEND_DIGIT(n2, *cp); \ cp++; \ } \ if (*cp == '$') { \ int hold = nextarg; \ nextarg = n2; \ ADDTYPE(T_INT); \ nextarg = hold; \ fmt = ++cp; \ } else { \ ADDTYPE(T_INT); \ } fmt = (char *)fmt0; typetable = stattypetable; tablesize = STATIC_ARG_TBL_SIZE; tablemax = 0; nextarg = 1; memset(typetable, T_UNUSED, STATIC_ARG_TBL_SIZE); memset(&ps, 0, sizeof(ps)); /* * Scan the format for conversions (`%' character). */ for (;;) { cp = fmt; while ((n = mbrtowc(&wc, fmt, MB_CUR_MAX, &ps)) > 0) { fmt += n; if (wc == '%') { fmt--; break; } } if (n <= 0) goto done; fmt++; /* skip over '%' */ flags = 0; rflag: ch = *fmt++; reswitch: switch (ch) { case ' ': case '#': goto rflag; case '*': ADDASTER(); goto rflag; case '-': case '+': goto rflag; case '.': if ((ch = *fmt++) == '*') { ADDASTER(); goto rflag; } while (is_digit(ch)) { ch = *fmt++; } goto reswitch; case '0': goto rflag; case '1': case '2': case '3': case '4': case '5': case '6': case '7': case '8': case '9': n = 0; do { APPEND_DIGIT(n ,ch); ch = *fmt++; } while (is_digit(ch)); if (ch == '$') { nextarg = n; goto rflag; } goto reswitch; #ifdef FLOATING_POINT case 'L': flags |= LONGDBL; goto rflag; #endif case 'h': if (*fmt == 'h') { fmt++; flags |= CHARINT; } else { flags |= SHORTINT; } goto rflag; case 'l': if (*fmt == 'l') { fmt++; flags |= LLONGINT; } else { flags |= LONGINT; } goto rflag; case 'q': flags |= LLONGINT; goto rflag; case 't': flags |= PTRINT; goto rflag; case 'z': flags |= SIZEINT; goto rflag; case 'c': ADDTYPE(T_INT); break; case 'D': flags |= LONGINT; /*FALLTHROUGH*/ case 'd': case 'i': ADDSARG(); break; #ifdef FLOATING_POINT 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 & LLONGINT) ADDTYPE(TP_LLONG); else if (flags & LONGINT) ADDTYPE(TP_LONG); else if (flags & SHORTINT) ADDTYPE(TP_SHORT); else if (flags & PTRINT) ADDTYPE(TP_PTRINT); else if (flags & SIZEINT) ADDTYPE(TP_SSIZEINT); else if (flags & MAXINT) ADDTYPE(TP_MAXINT); else ADDTYPE(TP_INT); continue; /* no output */ case 'O': flags |= LONGINT; /*FALLTHROUGH*/ case 'o': ADDUARG(); break; case 'p': ADDTYPE(TP_VOID); break; case 's': 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) { *argtablesiz = sizeof(union arg) * (tablemax + 1); *argtable = mmap(NULL, *argtablesiz, PROT_WRITE|PROT_READ, MAP_ANON|MAP_PRIVATE, -1, 0); if (*argtable == MAP_FAILED) return (-1); } #if 0 /* XXX is this required? */ (*argtable)[0].intarg = 0; #endif for (n = 1; n <= tablemax; n++) { switch (typetable[n]) { case T_UNUSED: case T_CHAR: case T_U_CHAR: case T_SHORT: case T_U_SHORT: case T_INT: (*argtable)[n].intarg = va_arg(ap, int); break; case TP_SHORT: (*argtable)[n].pshortarg = va_arg(ap, short *); 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; #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_PTRINT: (*argtable)[n].ptrdiffarg = va_arg(ap, ptrdiff_t); break; case TP_PTRINT: (*argtable)[n].pptrdiffarg = va_arg(ap, ptrdiff_t *); break; case T_SIZEINT: (*argtable)[n].sizearg = va_arg(ap, size_t); break; case T_SSIZEINT: (*argtable)[n].ssizearg = va_arg(ap, ssize_t); break; case TP_SSIZEINT: (*argtable)[n].pssizearg = va_arg(ap, ssize_t *); break; case TP_MAXINT: (*argtable)[n].intmaxarg = va_arg(ap, intmax_t); break; } } goto finish; overflow: errno = ENOMEM; ret = -1; finish: if (typetable != NULL && typetable != stattypetable) { munmap(typetable, *argtablesiz); typetable = NULL; } return (ret); } /* * Increase the size of the type table. */ static int __grow_type_table(unsigned char **typetable, int *tablesize) { unsigned char *oldtable = *typetable; int newsize = *tablesize * 2; if (newsize < getpagesize()) newsize = getpagesize(); if (*tablesize == STATIC_ARG_TBL_SIZE) { *typetable = mmap(NULL, newsize, PROT_WRITE|PROT_READ, MAP_ANON|MAP_PRIVATE, -1, 0); if (*typetable == MAP_FAILED) return (-1); bcopy(oldtable, *typetable, *tablesize); } else { unsigned char *new = mmap(NULL, newsize, PROT_WRITE|PROT_READ, MAP_ANON|MAP_PRIVATE, -1, 0); if (new == MAP_FAILED) return (-1); memmove(new, *typetable, *tablesize); munmap(*typetable, *tablesize); *typetable = new; } memset(*typetable + *tablesize, T_UNUSED, (newsize - *tablesize)); *tablesize = newsize; return (0); } #ifdef FLOATING_POINT static char * cvt(double value, int ndigits, int flags, char *sign, int *decpt, int ch, int *length) { 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 */ } if (value < 0) { value = -value; *sign = '-'; } else *sign = '\000'; digits = __dtoa(value, mode, ndigits, decpt, &dsgn, &rve); 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++) /* nothing */; } else { *p++ = '0'; *p++ = to_char(exp); } return (p - p0); } #endif /* FLOATING_POINT */