1 /* vi: set sw=4 ts=4: */
5 * Copyright (C) Manuel Novoa III <mjn3@codepoet.org>
6 * and Vladimir Oleynik <dzo@simtreas.ru>
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
31 #define isodigit(c) ((c) >= '0' && (c) <= '7')
32 #define hextobin(c) ((c)>='a'&&(c)<='f' ? (c)-'a'+10 : (c)>='A'&&(c)<='F' ? (c)-'A'+10 : (c)-'0')
33 #define octtobin(c) ((c) - '0')
34 char bb_process_escape_sequence(const char **ptr)
37 unsigned int num_digits, r, n, hexescape;
38 static const char charmap[] = {
39 'a', 'b', 'f', 'n', 'r', 't', 'v', '\\', 0,
40 '\a', '\b', '\f', '\n', '\r', '\t', '\v', '\\', '\\' };
42 n = r = hexescape = num_digits = 0;
51 if (hexescape && isxdigit(*q)) {
52 r = n * 16 + hextobin(*q);
53 } else if (isodigit(*q)) {
54 r = n * 8 + octtobin(*q);
59 if (++num_digits < 3) {
66 if (num_digits == 0) { /* mnemonic escape sequence? */
74 n = *(p+(sizeof(charmap)/2));