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authormatz <matz@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>1999-08-13 05:45:20 +0000
committermatz <matz@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>1999-08-13 05:45:20 +0000
commit65a5162550f58047974793cdc8067a970b2435c0 (patch)
tree082bb7d5568f3b2e36e3fe166e9f3039394fcf44 /missing/vsnprintf.c
parentfcd020c83028f5610d382e85a2df00223e12bd7e (diff)
1.4.0
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@520 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
Diffstat (limited to 'missing/vsnprintf.c')
-rw-r--r--missing/vsnprintf.c1128
1 files changed, 1128 insertions, 0 deletions
diff --git a/missing/vsnprintf.c b/missing/vsnprintf.c
new file mode 100644
index 0000000..5865be7
--- /dev/null
+++ b/missing/vsnprintf.c
@@ -0,0 +1,1128 @@
+/*-
+ * 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.
+ */
+
+/* SNPRINTF.C
+ * fjc 7-31-97 Modified by Mib Software to be a standalone snprintf.c module.
+ * http://www.mibsoftware.com
+ * Mib Software does not warrant this software any differently than the
+ * University of California, Berkeley as described above. All warranties
+ * are disclaimed. Use this software at your own risk.
+ *
+ * All code referencing FILE * functions was eliminated, since it could
+ * never be called. All header files and necessary files are collapsed
+ * into one file, internal functions are declared static. This should
+ * allow inclusion into libraries with less chance of namespace collisions.
+ *
+ * snprintf should be the only externally visible item.
+ *
+ * As of 7-31-97 FLOATING_POINT is NOT provided. The code is somewhat
+ * non-portable, so it is disabled.
+ */
+
+/* Define FLOATING_POINT to get floating point. */
+/*
+#define FLOATING_POINT
+*/
+
+#include <sys/types.h>
+#define u_long unsigned long
+#define u_short unsigned short
+#define u_int unsigned int
+
+#undef __P
+#if defined(__STDC__)
+# include <stdarg.h>
+# if !defined(__P)
+# define __P(x) x
+# endif
+#else
+# define __P(x) ()
+# if !defined(const)
+# define const
+# endif
+# include <varargs.h>
+#endif
+#ifndef _BSD_VA_LIST_
+#define _BSD_VA_LIST_ va_list
+#endif
+
+#ifdef __STDC__
+# include <limits.h>
+#else
+# ifndef LONG_MAX
+# ifdef HAVE_LIMITS_H
+# include <limits.h>
+# else
+ /* assuming 32bit(2's compliment) long */
+# define LONG_MAX 2147483647
+# endif
+# endif
+#endif
+
+#if defined(__hpux) && !defined(__GNUC__)
+#define const
+#endif
+
+#if defined(sgi)
+#undef __const
+#define __const
+#endif /* People who don't like const sys_error */
+
+#ifdef NT
+typedef long size_t;
+#endif
+
+#ifndef NULL
+#define NULL 0
+#endif
+
+/*
+ * NB: to fit things in six character monocase externals, the stdio
+ * code uses the prefix `__s' for stdio objects, typically followed
+ * by a three-character attempt at a mnemonic.
+ */
+
+/* stdio buffers */
+struct __sbuf {
+ unsigned char *_base;
+ int _size;
+};
+
+
+/*
+ * stdio state variables.
+ *
+ * The following always hold:
+ *
+ * if (_flags&(__SLBF|__SWR)) == (__SLBF|__SWR),
+ * _lbfsize is -_bf._size, else _lbfsize is 0
+ * if _flags&__SRD, _w is 0
+ * if _flags&__SWR, _r is 0
+ *
+ * This ensures that the getc and putc macros (or inline functions) never
+ * try to write or read from a file that is in `read' or `write' mode.
+ * (Moreover, they can, and do, automatically switch from read mode to
+ * write mode, and back, on "r+" and "w+" files.)
+ *
+ * _lbfsize is used only to make the inline line-buffered output stream
+ * code as compact as possible.
+ *
+ * _ub, _up, and _ur are used when ungetc() pushes back more characters
+ * than fit in the current _bf, or when ungetc() pushes back a character
+ * that does not match the previous one in _bf. When this happens,
+ * _ub._base becomes non-nil (i.e., a stream has ungetc() data iff
+ * _ub._base!=NULL) and _up and _ur save the current values of _p and _r.
+ *
+ * NB: see WARNING above before changing the layout of this structure!
+ */
+typedef struct __sFILE {
+ unsigned char *_p; /* current position in (some) buffer */
+ int _r; /* read space left for getc() */
+ int _w; /* write space left for putc() */
+ short _flags; /* flags, below; this FILE is free if 0 */
+ short _file; /* fileno, if Unix descriptor, else -1 */
+ struct __sbuf _bf; /* the buffer (at least 1 byte, if !NULL) */
+ int _lbfsize; /* 0 or -_bf._size, for inline putc */
+} FILE;
+
+
+#define __SLBF 0x0001 /* line buffered */
+#define __SNBF 0x0002 /* unbuffered */
+#define __SRD 0x0004 /* OK to read */
+#define __SWR 0x0008 /* OK to write */
+ /* RD and WR are never simultaneously asserted */
+#define __SRW 0x0010 /* open for reading & writing */
+#define __SEOF 0x0020 /* found EOF */
+#define __SERR 0x0040 /* found error */
+#define __SMBF 0x0080 /* _buf is from malloc */
+#define __SAPP 0x0100 /* fdopen()ed in append mode */
+#define __SSTR 0x0200 /* this is an sprintf/snprintf string */
+#define __SOPT 0x0400 /* do fseek() optimisation */
+#define __SNPT 0x0800 /* do not do fseek() optimisation */
+#define __SOFF 0x1000 /* set iff _offset is in fact correct */
+#define __SMOD 0x2000 /* true => fgetln modified _p text */
+
+
+#define EOF (-1)
+
+
+#define __sfeof(p) (((p)->_flags & __SEOF) != 0)
+#define __sferror(p) (((p)->_flags & __SERR) != 0)
+#define __sclearerr(p) ((void)((p)->_flags &= ~(__SERR|__SEOF)))
+#define __sfileno(p) ((p)->_file)
+
+#define feof(p) __sfeof(p)
+#define ferror(p) __sferror(p)
+#define clearerr(p) __sclearerr(p)
+
+#ifndef _ANSI_SOURCE
+#define fileno(p) __sfileno(p)
+#endif
+
+
+#if defined(__hpux) && !defined(__GNUC__)
+#include <string.h>
+#endif
+
+/*
+ * I/O descriptors for __sfvwrite().
+ */
+struct __siov {
+ void *iov_base;
+ size_t iov_len;
+};
+struct __suio {
+ struct __siov *uio_iov;
+ int uio_iovcnt;
+ int uio_resid;
+};
+
+/*
+ * Write some memory regions. Return zero on success, EOF on error.
+ *
+ * This routine is large and unsightly, but most of the ugliness due
+ * to the three different kinds of output buffering is handled here.
+ */
+static BSD__sfvwrite(fp, uio)
+ register FILE *fp;
+ register struct __suio *uio;
+{
+ register size_t len;
+ register char *p;
+ register struct __siov *iov;
+ register int w;
+
+ if ((len = uio->uio_resid) == 0)
+ return (0);
+#ifndef __hpux
+#define MIN(a, b) ((a) < (b) ? (a) : (b))
+#endif
+#define COPY(n) (void)memcpy((void *)fp->_p, (void *)p, (size_t)(n))
+
+ iov = uio->uio_iov;
+ p = iov->iov_base;
+ len = iov->iov_len;
+ iov++;
+#define GETIOV(extra_work) \
+ while (len == 0) { \
+ extra_work; \
+ p = iov->iov_base; \
+ len = iov->iov_len; \
+ iov++; \
+ }
+ if (fp->_flags & __SNBF) {
+ /* fjc 7-31-97 Will never happen. We are working with
+ strings only
+ */
+ } else if ((fp->_flags & __SLBF) == 0) {
+ /*
+ * Fully buffered: fill partially full buffer, if any,
+ * and then flush. If there is no partial buffer, write
+ * one _bf._size byte chunk directly (without copying).
+ *
+ * String output is a special case: write as many bytes
+ * as fit, but pretend we wrote everything. This makes
+ * snprintf() return the number of bytes needed, rather
+ * than the number used, and avoids its write function
+ * (so that the write function can be invalid).
+ */
+ do {
+ GETIOV(;);
+ w = fp->_w;
+ if (fp->_flags & __SSTR) {
+ if (len < w)
+ w = len;
+ COPY(w); /* copy MIN(fp->_w,len), */
+ fp->_w -= w;
+ fp->_p += w;
+ w = len; /* but pretend copied all */
+ } else {
+ /* fjc 7-31-97 Will never happen. We are working with
+ strings only
+ */
+ }
+ p += w;
+ len -= w;
+ } while ((uio->uio_resid -= w) != 0);
+ } else {
+ /* fjc 7-31-97 Will never happen. We are working with
+ strings only
+ */
+ }
+ return (0);
+
+err:
+ fp->_flags |= __SERR;
+ return (EOF);
+}
+
+/*
+ * Actual printf innards.
+ *
+ * This code is large and complicated...
+ */
+
+#if !defined(__CYGWIN32__) && defined(__hpux) && !defined(__GNUC__)
+#include <stdlib.h>
+#endif
+
+/*
+ * Flush out all the vectors defined by the given uio,
+ * then reset it so that it can be reused.
+ */
+static int
+BSD__sprint(fp, uio)
+ FILE *fp;
+ register struct __suio *uio;
+{
+ register int err;
+
+ if (uio->uio_resid == 0) {
+ uio->uio_iovcnt = 0;
+ return (0);
+ }
+ err = BSD__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
+BSD__sbprintf(fp, fmt, ap)
+ register FILE *fp;
+ const char *fmt;
+ va_list ap;
+{
+/* We don't support files. */
+ return 0;
+}
+
+
+/*
+ * 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 *
+BSD__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();
+ */
+ break; /* fjc 7-31-97. Don't reference abort() here */
+ }
+ return (cp);
+}
+
+#ifdef FLOATING_POINT
+#include <math.h>
+/* #include "floatio.h" */
+
+#ifndef MAXEXP
+# define MAXEXP 1024
+#endif
+
+#ifndef MAXFRACT
+# define MAXFRACT 64
+#endif
+
+#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 */
+
+
+/*
+ * 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; unimplemented */
+#define LONGINT 0x010 /* long integer */
+
+#ifdef _HAVE_SANE_QUAD_
+#define QUADINT 0x020 /* quad integer */
+#endif /* _HAVE_SANE_QUAD_ */
+
+#define SHORTINT 0x040 /* short integer */
+#define ZEROPAD 0x080 /* zero (as opposed to blank) pad */
+#define FPT 0x100 /* Floating point number */
+static int
+BSD_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; /* 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] */
+#ifdef _HAVE_SANE_QUAD_
+ u_quad_t uqval; /* %q integers */
+#endif /* _HAVE_SANE_QUAD_ */
+ int base; /* base for [diouxX] conversion */
+ int dprec; /* a copy of prec if [diouxX], 0 otherwise */
+ int fieldsz; /* field size expanded by sign, etc */
+ 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 */
+
+ /*
+ * 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 (BSD__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 && BSD__sprint(fp, &uio)) \
+ goto error; \
+ uio.uio_iovcnt = 0; \
+ iovp = iov; \
+}
+
+ /*
+ * To extend shorts properly, we need both signed and unsigned
+ * argument extraction methods.
+ */
+#define SARG() \
+ (flags&LONGINT ? va_arg(ap, long) : \
+ flags&SHORTINT ? (long)(short)va_arg(ap, int) : \
+ (long)va_arg(ap, int))
+#define UARG() \
+ (flags&LONGINT ? va_arg(ap, u_long) : \
+ flags&SHORTINT ? (u_long)(u_short)va_arg(ap, int) : \
+ (u_long)va_arg(ap, u_int))
+
+ /* optimise fprintf(stderr) (and other unbuffered Unix files) */
+ if ((fp->_flags & (__SNBF|__SWR|__SRW)) == (__SNBF|__SWR) &&
+ fp->_file >= 0)
+ return (BSD__sbprintf(fp, fmt0, ap));
+
+ fmt = (char *)fmt0;
+ 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) {
+ 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.
+ */
+ if ((width = va_arg(ap, int)) >= 0)
+ goto rflag;
+ width = -width;
+ /* FALLTHROUGH */
+ case '-':
+ flags |= LADJUST;
+ goto rflag;
+ case '+':
+ sign = '+';
+ goto rflag;
+ case '.':
+ if ((ch = *fmt++) == '*') {
+ n = va_arg(ap, int);
+ 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));
+ width = n;
+ goto reswitch;
+#ifdef FLOATING_POINT
+ case 'L':
+ flags |= LONGDBL;
+ goto rflag;
+#endif
+ case 'h':
+ flags |= SHORTINT;
+ goto rflag;
+ case 'l':
+ flags |= LONGINT;
+ goto rflag;
+#ifdef _HAVE_SANE_QUAD_
+ case 'q':
+ flags |= QUADINT;
+ goto rflag;
+#endif /* _HAVE_SANE_QUAD_ */
+ case 'c':
+ *(cp = buf) = va_arg(ap, int);
+ size = 1;
+ sign = '\0';
+ break;
+ case 'D':
+ flags |= LONGINT;
+ /*FALLTHROUGH*/
+ case 'd':
+ case 'i':
+#ifdef _HAVE_SANE_QUAD_
+ if (flags & QUADINT) {
+ uqval = va_arg(ap, quad_t);
+ if ((quad_t)uqval < 0) {
+ uqval = -uqval;
+ sign = '-';
+ }
+ } else {
+#else /* _HAVE_SANE_QUAD_ */
+ {
+#endif /* _HAVE_SANE_QUAD_ */
+ ulval = SARG();
+ if ((long)ulval < 0) {
+ ulval = -ulval;
+ sign = '-';
+ }
+ }
+ base = 10;
+ goto number;
+#ifdef FLOATING_POINT
+ case 'e': /* anomalous precision */
+ case 'E':
+ prec = (prec == -1) ?
+ DEFPREC + 1 : prec + 1;
+ /* FALLTHROUGH */
+ goto fp_begin;
+ case 'f': /* always print trailing zeroes */
+ if (prec != 0)
+ flags |= ALT;
+ case 'g':
+ case 'G':
+ if (prec == -1)
+ prec = DEFPREC;
+fp_begin: _double = va_arg(ap, 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':
+#ifdef _HAVE_SANE_QUAD_
+ if (flags & QUADINT)
+ *va_arg(ap, quad_t *) = ret;
+ else if (flags & LONGINT)
+#else /* _HAVE_SANE_QUAD_ */
+ if (flags & LONGINT)
+#endif /* _HAVE_SANE_QUAD_ */
+ *va_arg(ap, long *) = ret;
+ else if (flags & SHORTINT)
+ *va_arg(ap, short *) = ret;
+ else
+ *va_arg(ap, int *) = ret;
+ continue; /* no output */
+ case 'O':
+ flags |= LONGINT;
+ /*FALLTHROUGH*/
+ case 'o':
+#ifdef _HAVE_SANE_QUAD_
+ if (flags & QUADINT)
+ uqval = va_arg(ap, u_quad_t);
+ else
+#endif /* _HAVE_SANE_QUAD_ */
+ 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)va_arg(ap, void *);
+ base = 16;
+ xdigs = "0123456789abcdef";
+#ifdef _HAVE_SANE_QUAD_
+ flags = (flags & ~QUADINT) | HEXPREFIX;
+#else /* _HAVE_SANE_QUAD_ */
+ flags = (flags) | HEXPREFIX;
+#endif /* _HAVE_SANE_QUAD_ */
+ ch = 'x';
+ goto nosign;
+ case 's':
+ if ((cp = va_arg(ap, 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 = (char *)memchr(cp, 0, 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':
+#ifdef _HAVE_SANE_QUAD_
+ if (flags & QUADINT)
+ uqval = va_arg(ap, u_quad_t);
+ else
+#endif /* _HAVE_SANE_QUAD_ */
+ ulval = UARG();
+ base = 10;
+ goto nosign;
+ case 'X':
+ xdigs = "0123456789ABCDEF";
+ goto hex;
+ case 'x':
+ xdigs = "0123456789abcdef";
+hex:
+#ifdef _HAVE_SANE_QUAD_
+ if (flags & QUADINT)
+ uqval = va_arg(ap, u_quad_t);
+ else
+#endif /* _HAVE_SANE_QUAD_ */
+ ulval = UARG();
+ base = 16;
+ /* leading 0x/X only if non-zero */
+ if (flags & ALT &&
+#ifdef _HAVE_SANE_QUAD_
+ (flags & QUADINT ? uqval != 0 : ulval != 0))
+#else /* _HAVE_SANE_QUAD_ */
+ ulval != 0)
+#endif /* _HAVE_SANE_QUAD_ */
+ 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;
+#ifdef _HAVE_SANE_QUAD_
+ if (flags & QUADINT) {
+ if (uqval != 0 || prec != 0)
+ cp = __uqtoa(uqval, cp, base,
+ flags & ALT, xdigs);
+ } else {
+#else /* _HAVE_SANE_QUAD_ */
+ {
+#endif /* _HAVE_SANE_QUAD_ */
+ if (ulval != 0 || prec != 0)
+ cp = BSD__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.
+ * fieldsz excludes decimal prec; realsz includes it.
+ */
+ fieldsz = size;
+ if (sign)
+ fieldsz++;
+ else if (flags & HEXPREFIX)
+ fieldsz += 2;
+ realsz = dprec > fieldsz ? dprec : fieldsz;
+
+ /* 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 - fieldsz, 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 (prec == 0 ||
+ (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 || flags & ALT == 0) {
+ 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 += width > realsz ? width : realsz;
+
+ FLUSH(); /* copy out the I/O vectors */
+ }
+done:
+ FLUSH();
+error:
+ return (__sferror(fp) ? EOF : ret);
+ /* NOTREACHED */
+}
+
+#ifdef FLOATING_POINT
+
+extern char *BSD__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;
+ else {
+ mode = 2;
+ }
+ if (value < 0) {
+ value = -value;
+ *sign = '-';
+ } else
+ *sign = '\000';
+ digits = BSD__dtoa(value, mode, ndigits, decpt, &dsgn, &rve);
+ if (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 */
+
+int
+vsnprintf(str, n, fmt, ap)
+ char *str;
+ size_t n;
+ const char *fmt;
+ _BSD_VA_LIST_ ap;
+{
+ int ret;
+ FILE f;
+
+ if ((int)n < 1)
+ return (EOF);
+ f._flags = __SWR | __SSTR;
+ f._bf._base = f._p = (unsigned char *)str;
+ f._bf._size = f._w = n - 1;
+ ret = BSD_vfprintf(&f, fmt, ap);
+ *f._p = 0;
+ return (ret);
+}
+
+#if defined(LIBC_SCCS) && !defined(lint)
+static char sccsid[] = "@(#)snprintf.c 8.1 (Berkeley) 6/4/93";
+#endif /* LIBC_SCCS and not lint */
+
+#include <stddef.h>
+
+#if defined(__STDC__)
+# include <stdarg.h>
+#else
+# include <varargs.h>
+#endif
+
+int
+#if defined(__STDC__)
+snprintf(char *str, size_t n, char const *fmt, ...)
+#else
+snprintf(str, n, fmt, va_alist)
+char *str, *fmt;
+size_t n;
+va_dcl
+#endif
+{
+ int ret;
+ va_list ap;
+ FILE f;
+
+ if ((int)n < 1)
+ return (EOF);
+
+#if defined(__STDC__)
+ va_start(ap, fmt);
+#else
+ va_start(ap);
+#endif
+ f._flags = __SWR | __SSTR;
+ f._bf._base = f._p = (unsigned char *)str;
+ f._bf._size = f._w = n - 1;
+ ret = BSD_vfprintf(&f, fmt, ap);
+ *f._p = 0;
+ va_end(ap);
+ return (ret);
+}