usr/src/include/vis.h

/*
 * Copyright (c) 1989 The Regents of the University of California.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms are permitted
 * provided that the above copyright notice and this paragraph are
 * duplicated in all such forms and that any documentation,
 * advertising materials, and other materials related to such
 * distribution and use acknowledge that the software was developed
 * by the University of California, Berkeley.  The name of the
 * University may not be used to endorse or promote products derived
 * from this software without specific prior written permission.
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 *
 *      @(#)vis.h       5.1 (Berkeley) %G%
 */

/*
 * cencode flags
 */
#define CENC_CSTYLE     1       /* use C-style backslash sequences */
#define CENC_GRAPH      2       /* encode as ^? and M- sequences */
#define CENC_OCTAL      4       /* encode as octal sequences */
#define CENC_ALL        (CENC_CSTYLE|CENC_GRAPH|CENC_OCTAL)
#define CENC_WHITE      8       /* encode white-space chars (sp-tb-nl) */
#define CENC_RACHAR     0x10    /* look at read-ahead char */

/*
 * cdecode flags
 */
#define CDEC_HAT        1       /* treat ^ as special */
#define CDEC_END        2       /* reset decode machine */

/*
 * cdecode return codes
 */
#define CDEC_NEEDMORE   0       /* not done, feed another char */
#define CDEC_OK         1       /* done, character ready */
#define CDEC_OKPUSH     2       /* done, push back passed char */
#define CDEC_NOCHAR     3       /* done, no character ready (hidden newline) */
#define CDEC_SYNBAD     -1      /* unrecognized escape sequence */

extern char *cencode();