text: /*	$NetBSD: vis.h,v 1.22 2014/09/26 01:21:07 christos Exp $	*/
  
  /*-
   * Copyright (c) 1990, 1993
   *	The Regents of the University of California.  All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   * 1. Redistributions of source code must retain the above copyright
   *    notice, this list of conditions and the following disclaimer.
   * 2. Redistributions in binary form must reproduce the above copyright
   *    notice, this list of conditions and the following disclaimer in the
   *    documentation and/or other materials provided with the distribution.
   * 3. Neither the name of the University nor the names of its contributors
   *    may be used to endorse or promote products derived from this software
   *    without specific prior written permission.
   *
   * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   * SUCH DAMAGE.
   *
   *	@(#)vis.h	8.1 (Berkeley) 6/2/93
   */
  
  #ifndef _VIS_H_
  #define	_VIS_H_
  
  /*
   * to select alternate encoding format
   */
  #define	VIS_OCTAL	0x0001	/* use octal \ddd format */
  #define	VIS_CSTYLE	0x0002	/* use \[nrft0..] where appropiate */
  
  /*
   * to alter set of characters encoded (default is to encode all
   * non-graphic except space, tab, and newline).
   */
  #define	VIS_SP		0x0004	/* also encode space */
  #define	VIS_TAB		0x0008	/* also encode tab */
  #define	VIS_NL		0x0010	/* also encode newline */
  #define	VIS_WHITE	(VIS_SP | VIS_TAB | VIS_NL)
  #define	VIS_SAFE	0x0020	/* only encode "unsafe" characters */
  
  /*
   * other
   */
  #define	VIS_NOSLASH	0x0040	/* inhibit printing '\' */
  #define	VIS_HTTP1808	0x0080	/* http-style escape % hex hex */
  #define	VIS_HTTPSTYLE	0x0080	/* http-style escape % hex hex */
  #define	VIS_MIMESTYLE	0x0100	/* mime-style escape = HEX HEX */
  #define	VIS_HTTP1866	0x0200	/* http-style &#num; or &string; */
  #define	VIS_NOESCAPE	0x0400	/* don't decode `\' */
  #define	_VIS_END	0x0800	/* for unvis */
  #define	VIS_GLOB	0x1000	/* encode glob(3) magic characters */
  #define	VIS_SHELL	0x2000	/* encode shell special characters [not glob] */
  #define	VIS_META	(VIS_WHITE | VIS_GLOB | VIS_SHELL)
  
  /*
   * unvis return codes
   */
  #define	UNVIS_VALID	 1	/* character valid */
  #define	UNVIS_VALIDPUSH	 2	/* character valid, push back passed char */
  #define	UNVIS_NOCHAR	 3	/* valid sequence, no character produced */
  #define	UNVIS_SYNBAD	-1	/* unrecognized escape sequence */
  #define	UNVIS_ERROR	-2	/* decoder in unknown state (unrecoverable) */
  
  /*
   * unvis flags
   */
  #define	UNVIS_END	_VIS_END	/* no more characters */
  
  __BEGIN_DECLS
  char	*vis(char *, int, int, int);
  char	*nvis(char *, size_t, int, int, int);
  
  char	*svis(char *, int, int, int, const char *);
  char	*snvis(char *, size_t, int, int, int, const char *);
  
  int	strvis(char *, const char *, int);
  int	strnvis(char *, size_t, const char *, int);
  
  int	strsvis(char *, const char *, int, const char *);
  int	strsnvis(char *, size_t, const char *, int, const char *);
  
  int	strvisx(char *, const char *, size_t, int);
  int	strnvisx(char *, size_t, const char *, size_t, int);
  int 	strenvisx(char *, size_t, const char *, size_t, int, int *);
  
  int	strsvisx(char *, const char *, size_t, int, const char *);
  int	strsnvisx(char *, size_t, const char *, size_t, int, const char *);
  int	strsenvisx(char *, size_t, const char *, size_t , int, const char *,
      int *);
  
  int	strunvis(char *, const char *);
  int	strnunvis(char *, size_t, const char *);
  
  int	strunvisx(char *, const char *, int);
  int	strnunvisx(char *, size_t, const char *, int);
  
  #ifndef __LIBC12_SOURCE__
  int	unvis(char *, int, int *, int);
  #endif
  __END_DECLS
  
  #endif /* !_VIS_H_ */
  