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/*
* caret.c
*
* How non printable chars are represented
* Copyright (c) 1988, 89, 90, 91, 92, 93 Miguel Santana
* Copyright (c) 1995, 96, 97, 98 Akim Demaille, Miguel Santana
*/
/*
* This file is part of a2ps.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; see the file COPYING. If not, write to
* the Free Software Foundation, 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
/*
* $Id: caret.c,v 1.1.1.1.2.1 2007/12/29 01:58:16 mhatta Exp $
*/
#include "a2ps.h"
#include "jobs.h"
#include "routines.h"
/*
* Return a string describing the current unprintable format
*/
const char *
unprintable_format_to_string (enum unprintable_format format)
{
switch (format) {
case space:
return _("space (i.e., ` ')");
case octal:
return _("octal (i.e., `\\001' etc.)");
case hexa:
return _("hexadecimal (i.e., `\\x0a' etc.)");
case caret:
return _("caret (i.e., `^C', `M-^C' etc.)");
case Emacs:
return _("emacs (i.e., `C-c', `M-C-c' etc.)");
case question_mark:
return _("question-mark (i.e., `?')");
}
error (1, 0,
"switch of unprintable_format_to_string");
return NULL; /* For lint */
}
/*
* Escape a char, considering it is unprintable
* (Note: it is an error if the char is printable.
* result is unpredictable)
* Return the num of chars used
*/
int
escape_unprintable (a2ps_job * job, int c,
uchar * res)
{
int len = 0;
switch (job->unprintable_format) {
case octal:
sprintf ((char *) res, "\\\\%03o", c);
return 4;
case hexa:
sprintf ((char *) res, "\\\\x%02x", c);
return 4;
case question_mark:
USTRCCAT (res, '?');
return 1;
case space:
USTRCCAT (res, ' ');
return 1;
case caret:
if (0177 < c) {
ustrcat (res, "M-");
len += 2;
c &= 0177;
}
if (c < ' ') {
USTRCCAT(res, '^');
USTRCCAT(res, c);
len += 2;
} else if (c == 0177) {
ustrcat(res, "^?");
len += 2;
} else {
USTRCCAT(res, c);
len++;
}
return len;
case Emacs:
if (0177 < c) {
ustrcat(res, "M-");
len += 2;
c &= 0177;
}
if (c < ' ') {
ustrcat (res, "C-");
USTRCCAT(res, c);
len += 3;
} else if (c == 0177) {
ustrcat(res, "C-?");
len += 3;
} else {
USTRCCAT(res, c);
len++;
}
return len;
}
return 0; /* For -Wall */
}
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