From 65a5162550f58047974793cdc8067a970b2435c0 Mon Sep 17 00:00:00 2001 From: matz Date: Fri, 13 Aug 1999 05:45:20 +0000 Subject: 1.4.0 git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@520 b2dd03c8-39d4-4d8f-98ff-823fe69b080e --- missing/vsnprintf.c | 1128 +++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 1128 insertions(+) create mode 100644 missing/vsnprintf.c (limited to 'missing/vsnprintf.c') diff --git a/missing/vsnprintf.c b/missing/vsnprintf.c new file mode 100644 index 0000000000..5865be7f9b --- /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 +#define u_long unsigned long +#define u_short unsigned short +#define u_int unsigned int + +#undef __P +#if defined(__STDC__) +# include +# if !defined(__P) +# define __P(x) x +# endif +#else +# define __P(x) () +# if !defined(const) +# define const +# endif +# include +#endif +#ifndef _BSD_VA_LIST_ +#define _BSD_VA_LIST_ va_list +#endif + +#ifdef __STDC__ +# include +#else +# ifndef LONG_MAX +# ifdef HAVE_LIMITS_H +# include +# 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 +#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 +#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 +/* #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 + +#if defined(__STDC__) +# include +#else +# include +#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); +} -- cgit v1.2.3