usr/src/include/vis.h

/*-
 * Copyright (c) 1990 The Regents of the University of California.
 * All rights reserved.
 *
 * %sccs.include.redist.c%
 *
 *      @(#)vis.h       5.8 (Berkeley) %G%
 */

/*
 * to select alternate encoding format
 */
#define VIS_OCTAL       0x01    /* use octal \ddd format */
#define VIS_CSTYLE      0x02    /* 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          0x04    /* also encode space */
#define VIS_TAB         0x08    /* also encode tab */
#define VIS_NL          0x10    /* also encode newline */
#define VIS_WHITE       (VIS_SP | VIS_TAB | VIS_NL)
#define VIS_SAFE        0x20    /* only encode "unsafe" characters */

/*
 * other
 */
#define VIS_NOSLASH     0x40    /* inhibit printing '\' */

/*
 * 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       1       /* no more characters */

#include <sys/cdefs.h>

__BEGIN_DECLS
char    *vis __P((char *, char, int, char));
int     strvis __P((char *, const char *, int));
int     strvisx __P((char *, const char *, size_t, int));
int     strunvis __P((char *, const char *));
int     unvis __P((char *, char, int *, int));
__END_DECLS