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-rw-r--r--lib/libc/stdio/vfprintf.c1278
1 files changed, 1278 insertions, 0 deletions
diff --git a/lib/libc/stdio/vfprintf.c b/lib/libc/stdio/vfprintf.c
new file mode 100644
index 0000000..44fd34b
--- /dev/null
+++ b/lib/libc/stdio/vfprintf.c
@@ -0,0 +1,1278 @@
+/*-
+ * 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)
+#if 0
+static char sccsid[] = "@(#)vfprintf.c 8.1 (Berkeley) 6/4/93";
+#endif
+static const char rcsid[] =
+ "$FreeBSD$";
+#endif /* LIBC_SCCS and not lint */
+
+/*
+ * Actual printf innards.
+ *
+ * This code is large and complicated...
+ */
+
+#include <sys/types.h>
+
+#include <limits.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#if __STDC__
+#include <stdarg.h>
+#else
+#include <varargs.h>
+#endif
+
+#include "local.h"
+#include "fvwrite.h"
+#include "libc_private.h"
+
+/* Define FLOATING_POINT to get floating point. */
+#define FLOATING_POINT
+
+static int __sprint __P((FILE *, struct __suio *));
+static int __sbprintf __P((FILE *, const char *, va_list));
+static char * __ultoa __P((u_long, char *, int, int, char *));
+static char * __uqtoa __P((u_quad_t, char *, int, int, char *));
+static void __find_arguments __P((const char *, va_list, void ***));
+static void __grow_type_table __P((int, unsigned char **, int *));
+
+/*
+ * Flush out all the vectors defined by the given uio,
+ * then reset it so that it can be reused.
+ */
+static int
+__sprint(fp, uio)
+ FILE *fp;
+ register struct __suio *uio;
+{
+ register 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(fp, fmt, ap)
+ register 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;
+
+ /* 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(val, endp, base, octzero, xdigs)
+ register u_long val;
+ char *endp;
+ int base, octzero;
+ char *xdigs;
+{
+ register char *cp = endp;
+ register long sval;
+
+ /*
+ * 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);
+ }
+ /*
+ * 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);
+ sval = val / 10;
+ } else
+ sval = val;
+ do {
+ *--cp = to_char(sval % 10);
+ 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 quads. */
+static char *
+__uqtoa(val, endp, base, octzero, xdigs)
+ register u_quad_t val;
+ char *endp;
+ int base, octzero;
+ char *xdigs;
+{
+ register char *cp = endp;
+ register quad_t sval;
+
+ /* 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));
+ switch (base) {
+ case 10:
+ if (val < 10) {
+ *--cp = to_char(val % 10);
+ return (cp);
+ }
+ if (val > QUAD_MAX) {
+ *--cp = to_char(val % 10);
+ sval = val / 10;
+ } else
+ sval = val;
+ do {
+ *--cp = to_char(sval % 10);
+ 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);
+}
+
+#ifdef FLOATING_POINT
+#include <math.h>
+#include "floatio.h"
+
+#define BUF (MAXEXP+MAXFRACT+1) /* + decimal point */
+#define DEFPREC 6
+
+static char *cvt __P((double, int, int, char *, int *, int, int *));
+static int exponent __P((char *, int, int));
+
+#else /* no FLOATING_POINT */
+
+#define BUF 68
+
+#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 QUADINT 0x020 /* quad integer */
+#define SHORTINT 0x040 /* short integer */
+#define ZEROPAD 0x080 /* zero (as opposed to blank) pad */
+#define FPT 0x100 /* Floating point number */
+int
+vfprintf(fp, fmt0, ap)
+ FILE *fp;
+ const char *fmt0;
+ va_list ap;
+{
+ register char *fmt; /* format string */
+ register int ch; /* character from fmt */
+ register int n, n2; /* handy integer (short term usage) */
+ register char *cp; /* handy char pointer (short term usage) */
+ register struct __siov *iovp;/* for PRINT macro */
+ register 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) */
+#ifdef FLOATING_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 */
+#endif
+ u_long ulval; /* integer arguments %[diouxX] */
+ u_quad_t uqval; /* %q 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], %[eEfgG] */
+ char ox[2]; /* space for 0x hex-prefix */
+ void **argtable; /* args, built due to positional arg */
+ void *statargtable [STATIC_ARG_TBL_SIZE];
+ 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) { \
+ 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) : \
+ (long)GETARG(int))
+#define UARG() \
+ (flags&LONGINT ? GETARG(u_long) : \
+ flags&SHORTINT ? (u_long)(u_short)GETARG(int) : \
+ (u_long)GETARG(u_int))
+
+ /*
+ * 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); \
+ }
+
+
+ FLOCKFILE(fp);
+ /* sorry, fprintf(read_only_file, "") returns EOF, not 0 */
+ if (cantwrite(fp)) {
+ FUNLOCKFILE(fp);
+ return (EOF);
+ }
+
+ /* optimise fprintf(stderr) (and other unbuffered Unix files) */
+ if ((fp->_flags & (__SNBF|__SWR|__SRW)) == (__SNBF|__SWR) &&
+ fp->_file >= 0) {
+ FUNLOCKFILE(fp);
+ return (__sbprintf(fp, fmt0, ap));
+ }
+
+ fmt = (char *)fmt0;
+ argtable = NULL;
+ nextarg = 1;
+ 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 '.':
+ 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':
+ flags |= SHORTINT;
+ goto rflag;
+ case 'l':
+ if (flags & LONGINT)
+ flags |= QUADINT;
+ else
+ flags |= LONGINT;
+ goto rflag;
+ case 'q':
+ flags |= QUADINT;
+ goto rflag;
+ case 'c':
+ *(cp = buf) = GETARG(int);
+ size = 1;
+ sign = '\0';
+ break;
+ case 'D':
+ flags |= LONGINT;
+ /*FALLTHROUGH*/
+ case 'd':
+ case 'i':
+ if (flags & QUADINT) {
+ uqval = GETARG(quad_t);
+ if ((quad_t)uqval < 0) {
+ uqval = -uqval;
+ sign = '-';
+ }
+ } else {
+ ulval = SARG();
+ if ((long)ulval < 0) {
+ ulval = -ulval;
+ sign = '-';
+ }
+ }
+ base = 10;
+ goto number;
+#ifdef FLOATING_POINT
+ case 'e':
+ case 'E':
+ 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 = '-';
+ cp = "Inf";
+ size = 3;
+ break;
+ }
+ if (isnan(_double)) {
+ cp = "NaN";
+ size = 3;
+ break;
+ }
+ flags |= FPT;
+ 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 & QUADINT)
+ *GETARG(quad_t *) = ret;
+ else if (flags & LONGINT)
+ *GETARG(long *) = ret;
+ else if (flags & SHORTINT)
+ *GETARG(short *) = ret;
+ else
+ *GETARG(int *) = ret;
+ continue; /* no output */
+ case 'O':
+ flags |= LONGINT;
+ /*FALLTHROUGH*/
+ case 'o':
+ if (flags & QUADINT)
+ uqval = GETARG(u_quad_t);
+ 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
+ */
+ ulval = (u_long)GETARG(void *);
+ base = 16;
+ xdigs = "0123456789abcdef";
+ flags = (flags & ~QUADINT) | 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, (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 & QUADINT)
+ uqval = GETARG(u_quad_t);
+ else
+ ulval = UARG();
+ base = 10;
+ goto nosign;
+ case 'X':
+ xdigs = "0123456789ABCDEF";
+ goto hex;
+ case 'x':
+ xdigs = "0123456789abcdef";
+hex: if (flags & QUADINT)
+ uqval = GETARG(u_quad_t);
+ else
+ ulval = UARG();
+ base = 16;
+ /* leading 0x/X only if non-zero */
+ if (flags & ALT &&
+ (flags & QUADINT ? uqval != 0 : ulval != 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 (flags & QUADINT) {
+ if (uqval != 0 || prec != 0)
+ cp = __uqtoa(uqval, cp, base,
+ flags & ALT, xdigs);
+ } else {
+ if (ulval != 0 || prec != 0)
+ cp = __ultoa(ulval, cp, base,
+ flags & ALT, xdigs);
+ }
+ 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 */
+ if (expt >= ndig &&
+ (flags & ALT) == 0) {
+ PRINT("0", 1);
+ } else {
+ PRINT("0.", 2);
+ PAD(ndig - 1, zeroes);
+ }
+ } else if (expt <= 0) {
+ PRINT("0.", 2);
+ 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 */
+ ret += prsize;
+
+ FLUSH(); /* copy out the I/O vectors */
+ }
+done:
+ FLUSH();
+error:
+ if (__sferror(fp))
+ ret = EOF;
+ FUNLOCKFILE(fp);
+ if ((argtable != NULL) && (argtable != statargtable))
+ free (argtable);
+ return (ret);
+ /* NOTREACHED */
+}
+
+/*
+ * 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_QUAD 10
+#define T_U_QUAD 11
+#define TP_QUAD 12
+#define T_DOUBLE 13
+#define T_LONG_DOUBLE 14
+#define TP_CHAR 15
+#define TP_VOID 16
+
+/*
+ * 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 on if it overflows.
+ */
+static void
+__find_arguments (fmt0, ap, argtable)
+ const char *fmt0;
+ va_list ap;
+ void ***argtable;
+{
+ register char *fmt; /* format string */
+ register int ch; /* character from fmt */
+ register int n, n2; /* handy integer (short term usage) */
+ register char *cp; /* handy char pointer (short term usage) */
+ register int flags; /* flags as above */
+ int width; /* width from format (%8d), or 0 */
+ 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 */
+
+ /*
+ * Add an argument type to the table, expanding if necessary.
+ */
+#define ADDTYPE(type) \
+ ((nextarg >= tablesize) ? \
+ __grow_type_table(nextarg, &typetable, &tablesize) : 0, \
+ typetable[nextarg++] = type, \
+ (nextarg > tablemax) ? tablemax = nextarg : 0)
+
+#define ADDSARG() \
+ ((flags&LONGINT) ? ADDTYPE(T_LONG) : \
+ ((flags&SHORTINT) ? ADDTYPE(T_SHORT) : ADDTYPE(T_INT)))
+
+#define ADDUARG() \
+ ((flags&LONGINT) ? ADDTYPE(T_U_LONG) : \
+ ((flags&SHORTINT) ? ADDTYPE(T_U_SHORT) : 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 '+':
+ 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':
+ flags |= SHORTINT;
+ goto rflag;
+ case 'l':
+ if (flags & LONGINT)
+ flags |= QUADINT;
+ else
+ flags |= LONGINT;
+ goto rflag;
+ case 'q':
+ flags |= QUADINT;
+ goto rflag;
+ case 'c':
+ ADDTYPE(T_INT);
+ break;
+ case 'D':
+ flags |= LONGINT;
+ /*FALLTHROUGH*/
+ case 'd':
+ case 'i':
+ if (flags & QUADINT) {
+ ADDTYPE(T_QUAD);
+ } else {
+ 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 & QUADINT)
+ ADDTYPE(TP_QUAD);
+ else if (flags & LONGINT)
+ ADDTYPE(TP_LONG);
+ else if (flags & SHORTINT)
+ ADDTYPE(TP_SHORT);
+ else
+ ADDTYPE(TP_INT);
+ continue; /* no output */
+ case 'O':
+ flags |= LONGINT;
+ /*FALLTHROUGH*/
+ case 'o':
+ if (flags & QUADINT)
+ ADDTYPE(T_U_QUAD);
+ else
+ ADDUARG();
+ break;
+ case 'p':
+ ADDTYPE(TP_VOID);
+ break;
+ case 's':
+ ADDTYPE(TP_CHAR);
+ break;
+ case 'U':
+ flags |= LONGINT;
+ /*FALLTHROUGH*/
+ case 'u':
+ if (flags & QUADINT)
+ ADDTYPE(T_U_QUAD);
+ else
+ ADDUARG();
+ break;
+ case 'X':
+ case 'x':
+ if (flags & QUADINT)
+ ADDTYPE(T_U_QUAD);
+ else
+ 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 = (void **)
+ malloc (sizeof (void *) * (tablemax + 1));
+ }
+
+ (*argtable) [0] = NULL;
+ for (n = 1; n <= tablemax; n++) {
+ switch (typetable [n]) {
+ case T_UNUSED:
+ (*argtable) [n] = (void *) &va_arg (ap, int);
+ break;
+ case T_SHORT:
+ (*argtable) [n] = (void *) &va_arg (ap, int);
+ break;
+ case T_U_SHORT:
+ (*argtable) [n] = (void *) &va_arg (ap, int);
+ break;
+ case TP_SHORT:
+ (*argtable) [n] = (void *) &va_arg (ap, short *);
+ break;
+ case T_INT:
+ (*argtable) [n] = (void *) &va_arg (ap, int);
+ break;
+ case T_U_INT:
+ (*argtable) [n] = (void *) &va_arg (ap, unsigned int);
+ break;
+ case TP_INT:
+ (*argtable) [n] = (void *) &va_arg (ap, int *);
+ break;
+ case T_LONG:
+ (*argtable) [n] = (void *) &va_arg (ap, long);
+ break;
+ case T_U_LONG:
+ (*argtable) [n] = (void *) &va_arg (ap, unsigned long);
+ break;
+ case TP_LONG:
+ (*argtable) [n] = (void *) &va_arg (ap, long *);
+ break;
+ case T_QUAD:
+ (*argtable) [n] = (void *) &va_arg (ap, quad_t);
+ break;
+ case T_U_QUAD:
+ (*argtable) [n] = (void *) &va_arg (ap, u_quad_t);
+ break;
+ case TP_QUAD:
+ (*argtable) [n] = (void *) &va_arg (ap, quad_t *);
+ break;
+ case T_DOUBLE:
+ (*argtable) [n] = (void *) &va_arg (ap, double);
+ break;
+ case T_LONG_DOUBLE:
+ (*argtable) [n] = (void *) &va_arg (ap, long double);
+ break;
+ case TP_CHAR:
+ (*argtable) [n] = (void *) &va_arg (ap, char *);
+ break;
+ case TP_VOID:
+ (*argtable) [n] = (void *) &va_arg (ap, void *);
+ break;
+ }
+ }
+
+ if ((typetable != NULL) && (typetable != stattypetable))
+ free (typetable);
+}
+
+/*
+ * Increase the size of the type table.
+ */
+static void
+__grow_type_table (nextarg, typetable, tablesize)
+ int nextarg;
+ unsigned char **typetable;
+ int *tablesize;
+{
+ unsigned char *oldtable = *typetable;
+ int newsize = *tablesize * 2;
+
+ if (*tablesize == STATIC_ARG_TBL_SIZE) {
+ *typetable = (unsigned char *)
+ malloc (sizeof (unsigned char) * newsize);
+ bcopy (oldtable, *typetable, *tablesize);
+ } else {
+ *typetable = (unsigned char *)
+ reallocf (typetable, sizeof (unsigned char) * newsize);
+
+ }
+ memset (&typetable [*tablesize], T_UNUSED, (newsize - *tablesize));
+
+ *tablesize = newsize;
+}
+
+
+#ifdef FLOATING_POINT
+
+extern char *__dtoa __P((double, int, int, int *, int *, char **));
+
+static char *
+cvt(value, ndigits, flags, sign, decpt, ch, length)
+ double value;
+ int ndigits, flags, *decpt, ch, *length;
+ char *sign;
+{
+ 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(p0, exp, fmtch)
+ char *p0;
+ int exp, fmtch;
+{
+ register 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 */
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