зеркало из https://github.com/github/ruby.git
1259 строки
30 KiB
C
1259 строки
30 KiB
C
/*-
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* Copyright (c) 1990, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Chris Torek.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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/*
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* IMPORTANT NOTE:
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* --------------
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* From ftp://ftp.cs.berkeley.edu/pub/4bsd/README.Impt.License.Change
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* paragraph 3 above is now null and void.
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*/
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/* SNPRINTF.C
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* fjc 7-31-97 Modified by Mib Software to be a standalone snprintf.c module.
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* http://www.mibsoftware.com
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* Mib Software does not warrant this software any differently than the
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* University of California, Berkeley as described above. All warranties
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* are disclaimed. Use this software at your own risk.
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*
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* All code referencing FILE * functions was eliminated, since it could
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* never be called. All header files and necessary files are collapsed
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* into one file, internal functions are declared static. This should
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* allow inclusion into libraries with less chance of namespace collisions.
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*
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* snprintf should be the only externally visible item.
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*
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* As of 7-31-97 FLOATING_POINT is NOT provided. The code is somewhat
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* non-portable, so it is disabled.
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*/
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/* Define FLOATING_POINT to get floating point. */
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/*
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#define FLOATING_POINT
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*/
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#include <sys/types.h>
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#define u_long unsigned long
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#define u_short unsigned short
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#define u_int unsigned int
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#if !defined(HAVE_STDARG_PROTOTYPES)
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#if defined(__STDC__)
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#define HAVE_STDARG_PROTOTYPES 1
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#endif
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#endif
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#undef __P
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#if defined(HAVE_STDARG_PROTOTYPES)
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# include <stdarg.h>
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# if !defined(__P)
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# define __P(x) x
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# endif
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#else
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# define __P(x) ()
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# if !defined(const)
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# define const
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# endif
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# include <varargs.h>
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#endif
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#ifndef _BSD_VA_LIST_
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#define _BSD_VA_LIST_ va_list
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#endif
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#ifdef __STDC__
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# include <limits.h>
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#else
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# ifndef LONG_MAX
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# ifdef HAVE_LIMITS_H
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# include <limits.h>
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# else
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/* assuming 32bit(2's compliment) long */
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# define LONG_MAX 2147483647
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# endif
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# endif
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#endif
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#if defined(__hpux) && !defined(__GNUC__) && !defined(__STDC__)
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#define const
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#endif
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#if defined(sgi)
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#undef __const
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#define __const
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#endif /* People who don't like const sys_error */
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#include <stddef.h>
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#if defined(__hpux) && !defined(__GNUC__) || defined(__DECC)
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#include <string.h>
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#endif
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#if !defined(__CYGWIN32__) && defined(__hpux) && !defined(__GNUC__)
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#include <stdlib.h>
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#endif
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#ifndef NULL
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#define NULL 0
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#endif
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#if SIZEOF_LONG > SIZEOF_INT
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# include <errno.h>
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#endif
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/*
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* NB: to fit things in six character monocase externals, the stdio
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* code uses the prefix `__s' for stdio objects, typically followed
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* by a three-character attempt at a mnemonic.
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*/
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/* stdio buffers */
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struct __sbuf {
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unsigned char *_base;
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size_t _size;
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};
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/*
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* stdio state variables.
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*
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* The following always hold:
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*
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* if (_flags&(__SLBF|__SWR)) == (__SLBF|__SWR),
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* _lbfsize is -_bf._size, else _lbfsize is 0
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* if _flags&__SRD, _w is 0
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* if _flags&__SWR, _r is 0
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*
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* This ensures that the getc and putc macros (or inline functions) never
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* try to write or read from a file that is in `read' or `write' mode.
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* (Moreover, they can, and do, automatically switch from read mode to
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* write mode, and back, on "r+" and "w+" files.)
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*
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* _lbfsize is used only to make the inline line-buffered output stream
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* code as compact as possible.
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*
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* _ub, _up, and _ur are used when ungetc() pushes back more characters
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* than fit in the current _bf, or when ungetc() pushes back a character
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* that does not match the previous one in _bf. When this happens,
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* _ub._base becomes non-nil (i.e., a stream has ungetc() data iff
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* _ub._base!=NULL) and _up and _ur save the current values of _p and _r.
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*
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* NB: see WARNING above before changing the layout of this structure!
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*/
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typedef struct __sFILE {
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unsigned char *_p; /* current position in (some) buffer */
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#if 0
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size_t _r; /* read space left for getc() */
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#endif
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size_t _w; /* write space left for putc() */
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short _flags; /* flags, below; this FILE is free if 0 */
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short _file; /* fileno, if Unix descriptor, else -1 */
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struct __sbuf _bf; /* the buffer (at least 1 byte, if !NULL) */
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size_t _lbfsize; /* 0 or -_bf._size, for inline putc */
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int (*vwrite)(/* struct __sFILE*, struct __suio * */);
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} FILE;
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#define __SLBF 0x0001 /* line buffered */
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#define __SNBF 0x0002 /* unbuffered */
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#define __SRD 0x0004 /* OK to read */
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#define __SWR 0x0008 /* OK to write */
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/* RD and WR are never simultaneously asserted */
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#define __SRW 0x0010 /* open for reading & writing */
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#define __SEOF 0x0020 /* found EOF */
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#define __SERR 0x0040 /* found error */
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#define __SMBF 0x0080 /* _buf is from malloc */
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#define __SAPP 0x0100 /* fdopen()ed in append mode */
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#define __SSTR 0x0200 /* this is an sprintf/snprintf string */
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#define __SOPT 0x0400 /* do fseek() optimisation */
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#define __SNPT 0x0800 /* do not do fseek() optimisation */
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#define __SOFF 0x1000 /* set iff _offset is in fact correct */
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#define __SMOD 0x2000 /* true => fgetln modified _p text */
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#define EOF (-1)
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#define __sfeof(p) (((p)->_flags & __SEOF) != 0)
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#define __sferror(p) (((p)->_flags & __SERR) != 0)
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#define __sclearerr(p) ((void)((p)->_flags &= ~(__SERR|__SEOF)))
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#define __sfileno(p) ((p)->_file)
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#undef feof
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#undef ferror
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#undef clearerr
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#define feof(p) __sfeof(p)
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#define ferror(p) __sferror(p)
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#define clearerr(p) __sclearerr(p)
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#ifndef _ANSI_SOURCE
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#define fileno(p) __sfileno(p)
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#endif
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/*
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* I/O descriptors for __sfvwrite().
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*/
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struct __siov {
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const void *iov_base;
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size_t iov_len;
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};
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struct __suio {
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struct __siov *uio_iov;
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int uio_iovcnt;
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size_t uio_resid;
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};
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/*
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* Write some memory regions. Return zero on success, EOF on error.
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*
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* This routine is large and unsightly, but most of the ugliness due
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* to the three different kinds of output buffering is handled here.
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*/
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static int BSD__sfvwrite(fp, uio)
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register FILE *fp;
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register struct __suio *uio;
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{
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register size_t len;
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register const char *p;
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register struct __siov *iov;
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register size_t w;
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if ((len = uio->uio_resid) == 0)
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return (0);
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#ifndef __hpux
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#define MIN(a, b) ((a) < (b) ? (a) : (b))
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#endif
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#define COPY(n) (void)memcpy((void *)fp->_p, (void *)p, (size_t)(n))
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iov = uio->uio_iov;
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p = iov->iov_base;
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len = iov->iov_len;
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iov++;
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#define GETIOV(extra_work) \
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while (len == 0) { \
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extra_work; \
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p = iov->iov_base; \
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len = iov->iov_len; \
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iov++; \
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}
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if (fp->_flags & __SNBF) {
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/* fjc 7-31-97 Will never happen. We are working with
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strings only
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*/
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} else if ((fp->_flags & __SLBF) == 0) {
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/*
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* Fully buffered: fill partially full buffer, if any,
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* and then flush. If there is no partial buffer, write
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* one _bf._size byte chunk directly (without copying).
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*
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* String output is a special case: write as many bytes
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* as fit, but pretend we wrote everything. This makes
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* snprintf() return the number of bytes needed, rather
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* than the number used, and avoids its write function
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* (so that the write function can be invalid).
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*/
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do {
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GETIOV(;);
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w = fp->_w;
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if (fp->_flags & __SSTR) {
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if (len < w)
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w = len;
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COPY(w); /* copy MIN(fp->_w,len), */
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fp->_w -= w;
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fp->_p += w;
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w = len; /* but pretend copied all */
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} else {
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/* fjc 7-31-97 Will never happen. We are working with
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strings only
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*/
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}
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p += w;
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len -= w;
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} while ((uio->uio_resid -= w) != 0);
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} else {
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/* fjc 7-31-97 Will never happen. We are working with
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strings only
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*/
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}
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return (0);
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}
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/*
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* Actual printf innards.
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*
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* This code is large and complicated...
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*/
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/*
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* Flush out all the vectors defined by the given uio,
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* then reset it so that it can be reused.
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*/
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static int
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BSD__sprint(FILE *fp, register struct __suio *uio)
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{
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register int err;
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if (uio->uio_resid == 0) {
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uio->uio_iovcnt = 0;
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return (0);
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}
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err = (*fp->vwrite)(fp, uio);
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uio->uio_resid = 0;
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uio->uio_iovcnt = 0;
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return (err);
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}
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/*
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* Helper function for `fprintf to unbuffered unix file': creates a
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* temporary buffer. We only work on write-only files; this avoids
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* worries about ungetc buffers and so forth.
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*/
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static int
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BSD__sbprintf(register FILE *fp, const char *fmt, va_list ap)
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{
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/* We don't support files. */
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return 0;
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}
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/*
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* Macros for converting digits to letters and vice versa
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*/
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#define to_digit(c) ((c) - '0')
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#define is_digit(c) ((unsigned)to_digit(c) <= 9)
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#define to_char(n) (char)((n) + '0')
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#ifdef _HAVE_SANE_QUAD_
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/*
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* Convert an unsigned long long to ASCII for printf purposes, returning
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* a pointer to the first character of the string representation.
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* Octal numbers can be forced to have a leading zero; hex numbers
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* use the given digits.
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*/
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static char *
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BSD__uqtoa(register u_quad_t val, char *endp, int base, int octzero, const char *xdigs)
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{
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register char *cp = endp;
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register long sval;
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/*
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* Handle the three cases separately, in the hope of getting
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* better/faster code.
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*/
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switch (base) {
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case 10:
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if (val < 10) { /* many numbers are 1 digit */
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*--cp = to_char(val);
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return (cp);
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}
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/*
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* On many machines, unsigned arithmetic is harder than
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* signed arithmetic, so we do at most one unsigned mod and
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* divide; this is sufficient to reduce the range of
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* the incoming value to where signed arithmetic works.
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*/
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if (val > LLONG_MAX) {
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*--cp = to_char(val % 10);
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sval = val / 10;
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} else
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sval = val;
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do {
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*--cp = to_char(sval % 10);
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sval /= 10;
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} while (sval != 0);
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break;
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case 8:
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do {
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*--cp = to_char(val & 7);
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val >>= 3;
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} while (val);
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if (octzero && *cp != '0')
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*--cp = '0';
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break;
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case 16:
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do {
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*--cp = xdigs[val & 15];
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val >>= 4;
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} while (val);
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break;
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default: /* oops */
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/*
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abort();
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*/
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break; /* fjc 7-31-97. Don't reference abort() here */
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}
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return (cp);
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}
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#endif /* _HAVE_SANE_QUAD_ */
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/*
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* Convert an unsigned long to ASCII for printf purposes, returning
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* a pointer to the first character of the string representation.
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* Octal numbers can be forced to have a leading zero; hex numbers
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* use the given digits.
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*/
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static char *
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BSD__ultoa(register u_long val, char *endp, int base, int octzero, const char *xdigs)
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{
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register char *cp = endp;
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register long sval;
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/*
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* Handle the three cases separately, in the hope of getting
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* better/faster code.
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*/
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switch (base) {
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case 10:
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if (val < 10) { /* many numbers are 1 digit */
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*--cp = to_char(val);
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return (cp);
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}
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/*
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* On many machines, unsigned arithmetic is harder than
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* signed arithmetic, so we do at most one unsigned mod and
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* divide; this is sufficient to reduce the range of
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* the incoming value to where signed arithmetic works.
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*/
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if (val > LONG_MAX) {
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*--cp = to_char(val % 10);
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sval = val / 10;
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} else
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sval = val;
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do {
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*--cp = to_char(sval % 10);
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sval /= 10;
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} while (sval != 0);
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break;
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case 8:
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do {
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*--cp = to_char(val & 7);
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val >>= 3;
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} while (val);
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if (octzero && *cp != '0')
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*--cp = '0';
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break;
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case 16:
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do {
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*--cp = xdigs[val & 15];
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val >>= 4;
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} while (val);
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break;
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default: /* oops */
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/*
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abort();
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*/
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break; /* fjc 7-31-97. Don't reference abort() here */
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}
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return (cp);
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}
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#ifdef FLOATING_POINT
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#include <math.h>
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/* #include "floatio.h" */
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#ifndef MAXEXP
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# define MAXEXP 1024
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#endif
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#ifndef MAXFRACT
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# define MAXFRACT 64
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#endif
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#define BUF (MAXEXP+MAXFRACT+1) /* + decimal point */
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#define DEFPREC 6
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static char *cvt __P((double, int, int, char *, int *, int, int *, char *));
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static int exponent __P((char *, int, int));
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#else /* no FLOATING_POINT */
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#define BUF 68
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#endif /* FLOATING_POINT */
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/*
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* Flags used during conversion.
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*/
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#define ALT 0x001 /* alternate form */
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#define HEXPREFIX 0x002 /* add 0x or 0X prefix */
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#define LADJUST 0x004 /* left adjustment */
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#define LONGDBL 0x008 /* long double; unimplemented */
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#define LONGINT 0x010 /* long integer */
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#ifdef _HAVE_SANE_QUAD_
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#define QUADINT 0x020 /* quad integer */
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#endif /* _HAVE_SANE_QUAD_ */
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#define SHORTINT 0x040 /* short integer */
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#define ZEROPAD 0x080 /* zero (as opposed to blank) pad */
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#define FPT 0x100 /* Floating point number */
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static ssize_t
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BSD_vfprintf(FILE *fp, const char *fmt0, va_list ap)
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{
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register const char *fmt; /* format string */
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register int ch; /* character from fmt */
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register int n; /* handy integer (short term usage) */
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register const char *cp;/* handy char pointer (short term usage) */
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register struct __siov *iovp;/* for PRINT macro */
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register int flags; /* flags as above */
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ssize_t 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 = 0; /* double precision arguments %[eEfgG] */
|
|
int expt; /* integer value of exponent */
|
|
int expsize = 0; /* character count for expstr */
|
|
int ndig = 0; /* 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 */
|
|
long fieldsz; /* field size expanded by sign, etc */
|
|
long realsz; /* field size expanded by dprec */
|
|
int size; /* size of converted field or string */
|
|
const char *xdigs = 0; /* 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[4]; /* space for 0x hex-prefix, hexadecimal's 1. */
|
|
char *const ebuf = buf + sizeof(buf);
|
|
#if SIZEOF_LONG > SIZEOF_INT
|
|
long ln;
|
|
#endif
|
|
|
|
/*
|
|
* Choose PADSIZE to trade efficiency vs. size. If larger printf
|
|
* fields occur frequently, increase PADSIZE and make the initializers
|
|
* below longer.
|
|
*/
|
|
#define PADSIZE 16 /* pad chunk size */
|
|
static const char blanks[PADSIZE] =
|
|
{' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' '};
|
|
static const 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); \
|
|
} \
|
|
}
|
|
#if SIZEOF_LONG > SIZEOF_INT
|
|
/* abandon if too larger padding */
|
|
#define PAD_L(howmany, with) { \
|
|
ln = (howmany); \
|
|
if ((long)((int)ln) != ln) { \
|
|
errno = ENOMEM; \
|
|
goto error; \
|
|
} \
|
|
if (ln > 0) PAD((int)ln, with); \
|
|
}
|
|
#else
|
|
#define PAD_L(howmany, with) PAD(howmany, with)
|
|
#endif
|
|
#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 = fmt0;
|
|
uio.uio_iov = iovp = iov;
|
|
uio.uio_resid = 0;
|
|
uio.uio_iovcnt = 0;
|
|
ret = 0;
|
|
xdigs = 0;
|
|
|
|
/*
|
|
* Scan the format for conversions (`%' character).
|
|
*/
|
|
for (;;) {
|
|
size_t nc;
|
|
for (cp = fmt; (ch = *fmt) != '\0' && ch != '%'; fmt++)
|
|
/* void */;
|
|
if ((nc = fmt - cp) != 0) {
|
|
PRINT(cp, nc);
|
|
ret += nc;
|
|
}
|
|
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;
|
|
#if SIZEOF_PTRDIFF_T == SIZEOF_LONG
|
|
case 't':
|
|
#endif
|
|
#if SIZEOF_SIZE_T == SIZEOF_LONG
|
|
case 'z':
|
|
#endif
|
|
case 'l':
|
|
flags |= LONGINT;
|
|
goto rflag;
|
|
#ifdef _HAVE_SANE_QUAD_
|
|
#if SIZEOF_PTRDIFF_T == SIZEOF_LONG_LONG
|
|
case 't':
|
|
#endif
|
|
#if SIZEOF_SIZE_T == SIZEOF_LONG_LONG
|
|
case 'z':
|
|
#endif
|
|
case 'q':
|
|
flags |= QUADINT;
|
|
goto rflag;
|
|
#endif /* _HAVE_SANE_QUAD_ */
|
|
case 'c':
|
|
cp = buf;
|
|
*buf = (char)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 = -(quad_t)uqval;
|
|
sign = '-';
|
|
}
|
|
} else
|
|
#endif /* _HAVE_SANE_QUAD_ */
|
|
{
|
|
ulval = SARG();
|
|
if ((long)ulval < 0) {
|
|
ulval = (u_long)(-(long)ulval);
|
|
sign = '-';
|
|
}
|
|
}
|
|
base = 10;
|
|
goto number;
|
|
#ifdef FLOATING_POINT
|
|
case 'a':
|
|
case 'A':
|
|
if (prec >= 0) {
|
|
flags |= ALT;
|
|
prec++;
|
|
}
|
|
goto fp_begin;
|
|
case 'e': /* anomalous precision */
|
|
case 'E':
|
|
if (prec != 0)
|
|
flags |= ALT;
|
|
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, buf);
|
|
if (ch == 'g' || ch == 'G') {
|
|
if (expt <= -4 || (expt > prec && expt > 1))
|
|
ch = (ch == 'g') ? 'e' : 'E';
|
|
else
|
|
ch = 'g';
|
|
}
|
|
if (ch == 'a' || ch == 'A') {
|
|
flags |= HEXPREFIX;
|
|
--expt;
|
|
expsize = exponent(expstr, expt, ch + 'p' - 'a');
|
|
ch += 'x' - 'a';
|
|
size = expsize + ndig;
|
|
if (ndig > 1 || flags & ALT)
|
|
++size; /* floating point */
|
|
}
|
|
else 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 if (!prec) { /* "0" */
|
|
size = 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 *) = (short)ret;
|
|
else
|
|
*va_arg(ap, int *) = (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
|
|
*/
|
|
prec = (int)(sizeof(void*)*CHAR_BIT/4);
|
|
#ifdef _HAVE_LLP64_
|
|
uqval = (u_quad_t)va_arg(ap, void *);
|
|
flags = (flags) | QUADINT | HEXPREFIX;
|
|
#else
|
|
ulval = (u_long)va_arg(ap, void *);
|
|
#ifdef _HAVE_SANE_QUAD_
|
|
flags = (flags & ~QUADINT) | HEXPREFIX;
|
|
#else /* _HAVE_SANE_QUAD_ */
|
|
flags = (flags) | HEXPREFIX;
|
|
#endif /* _HAVE_SANE_QUAD_ */
|
|
#endif
|
|
base = 16;
|
|
xdigs = "0123456789abcdef";
|
|
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.
|
|
*/
|
|
const char *p = (char *)memchr(cp, 0, prec);
|
|
|
|
if (p != NULL && (p - cp) > prec)
|
|
size = (int)(p - cp);
|
|
else
|
|
size = prec;
|
|
}
|
|
else {
|
|
fieldsz = strlen(cp);
|
|
goto long_len;
|
|
}
|
|
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
|
|
*/
|
|
#ifdef _HAVE_SANE_QUAD_
|
|
if (flags & QUADINT) {
|
|
if (uqval != 0 || prec != 0)
|
|
cp = BSD__uqtoa(uqval, ebuf, base,
|
|
flags & ALT, xdigs);
|
|
} else
|
|
#else /* _HAVE_SANE_QUAD_ */
|
|
#endif /* _HAVE_SANE_QUAD_ */
|
|
{
|
|
if (ulval != 0 || prec != 0)
|
|
cp = BSD__ultoa(ulval, ebuf, base,
|
|
flags & ALT, xdigs);
|
|
}
|
|
size = (int)(ebuf - cp);
|
|
break;
|
|
default: /* "%?" prints ?, unless ? is NUL */
|
|
if (ch == '\0')
|
|
goto done;
|
|
/* pretend it was %c with argument ch */
|
|
cp = buf;
|
|
*buf = 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;
|
|
long_len:
|
|
if (sign)
|
|
fieldsz++;
|
|
if (flags & HEXPREFIX)
|
|
fieldsz += 2;
|
|
realsz = dprec > fieldsz ? dprec : fieldsz;
|
|
|
|
/* right-adjusting blank padding */
|
|
if ((flags & (LADJUST|ZEROPAD)) == 0)
|
|
PAD_L(width - realsz, blanks);
|
|
|
|
/* prefix */
|
|
if (sign) {
|
|
PRINT(&sign, 1);
|
|
}
|
|
if (flags & HEXPREFIX) {
|
|
ox[0] = '0';
|
|
ox[1] = ch;
|
|
PRINT(ox, 2);
|
|
}
|
|
|
|
/* right-adjusting zero padding */
|
|
if ((flags & (LADJUST|ZEROPAD)) == ZEROPAD)
|
|
PAD_L(width - realsz, zeroes);
|
|
|
|
/* leading zeroes from decimal precision */
|
|
PAD_L(dprec - fieldsz, zeroes);
|
|
if (sign)
|
|
fieldsz--;
|
|
if (flags & HEXPREFIX)
|
|
fieldsz -= 2;
|
|
|
|
/* the string or number proper */
|
|
#ifdef FLOATING_POINT
|
|
if ((flags & FPT) == 0) {
|
|
PRINT(cp, fieldsz);
|
|
} else { /* glue together f_p fragments */
|
|
if (flags & HEXPREFIX) {
|
|
if (ndig > 1 || flags & ALT) {
|
|
ox[2] = *cp++;
|
|
ox[3] = '.';
|
|
PRINT(ox+2, 2);
|
|
if (ndig > 0) PRINT(cp, ndig-1);
|
|
} else /* XpYYY */
|
|
PRINT(cp, 1);
|
|
PRINT(expstr, expsize);
|
|
}
|
|
else if (ch >= 'f') { /* 'f' or 'g' */
|
|
if (_double == 0) {
|
|
/* kludge for __dtoa irregularity */
|
|
if (ndig <= 1 &&
|
|
(flags & ALT) == 0) {
|
|
PRINT("0", 1);
|
|
} else {
|
|
PRINT("0.", 2);
|
|
PAD(ndig - 1, zeroes);
|
|
}
|
|
} else if (expt == 0 && ndig == 0 && (flags & ALT) == 0) {
|
|
PRINT("0", 1);
|
|
} 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, fieldsz);
|
|
#endif
|
|
/* left-adjusting padding (always blank) */
|
|
if (flags & LADJUST)
|
|
PAD_L(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 **));
|
|
extern char *BSD__hdtoa(double, const char *, int, int *, int *, char **);
|
|
|
|
static char *
|
|
cvt(value, ndigits, flags, sign, decpt, ch, length, buf)
|
|
double value;
|
|
int ndigits, flags, *decpt, ch, *length;
|
|
char *sign, *buf;
|
|
{
|
|
int mode, dsgn;
|
|
char *digits, *bp, *rve;
|
|
|
|
if (ch == 'f')
|
|
mode = 3;
|
|
else {
|
|
mode = 2;
|
|
}
|
|
if (value < 0) {
|
|
value = -value;
|
|
*sign = '-';
|
|
} else if (value == 0.0 && 1.0/value < 0) {
|
|
*sign = '-';
|
|
} else {
|
|
*sign = '\000';
|
|
}
|
|
if (ch == 'a' || ch =='A') {
|
|
digits = BSD__hdtoa(value,
|
|
ch == 'a' ? "0123456789abcdef" : "0123456789ABCDEF",
|
|
ndigits, decpt, &dsgn, &rve);
|
|
}
|
|
else {
|
|
digits = BSD__dtoa(value, mode, ndigits, decpt, &dsgn, &rve);
|
|
}
|
|
memcpy(buf, digits, rve - digits);
|
|
xfree(digits);
|
|
rve = buf + (rve - digits);
|
|
digits = buf;
|
|
if (flags & ALT) { /* Print trailing zeros */
|
|
bp = digits + ndigits;
|
|
if (ch == 'f') {
|
|
if (*digits == '0' && value)
|
|
*decpt = -ndigits + 1;
|
|
bp += *decpt;
|
|
}
|
|
while (rve < bp)
|
|
*rve++ = '0';
|
|
}
|
|
*length = (int)(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 {
|
|
if (fmtch & 15) *p++ = '0'; /* other than p or P */
|
|
*p++ = to_char(exp);
|
|
}
|
|
return (int)(p - p0);
|
|
}
|
|
#endif /* FLOATING_POINT */
|
|
|
|
int
|
|
ruby_vsnprintf(char *str, size_t n, const char *fmt, 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;
|
|
f.vwrite = BSD__sfvwrite;
|
|
ret = (int)BSD_vfprintf(&f, fmt, ap);
|
|
*f._p = 0;
|
|
return (ret);
|
|
}
|
|
|
|
int
|
|
ruby_snprintf(char *str, size_t n, char const *fmt, ...)
|
|
{
|
|
int ret;
|
|
va_list ap;
|
|
FILE f;
|
|
|
|
if ((int)n < 1)
|
|
return (EOF);
|
|
|
|
va_start(ap, fmt);
|
|
f._flags = __SWR | __SSTR;
|
|
f._bf._base = f._p = (unsigned char *)str;
|
|
f._bf._size = f._w = n - 1;
|
|
f.vwrite = BSD__sfvwrite;
|
|
ret = (int)BSD_vfprintf(&f, fmt, ap);
|
|
*f._p = 0;
|
|
va_end(ap);
|
|
return (ret);
|
|
}
|