attr updates from Andreas - emphasis on improved handling of special characters, and creates an little library for helper functions

1 files changed, 54 insertions, 0 deletions

diff --git a/libmisc/unquote.c b/libmisc/unquote.c
new file mode 100644
index 0000000..5444b65
--- /dev/null
+++ b/libmisc/unquote.c
@@ -0,0 +1,54 @@
+/*
+  File: unquote.c
+
+  Copyright (C) 2003 Andreas Gruenbacher <a.gruenbacher@computer.org>
+
+  This program is free software; you can redistribute it and/or
+  modify it under the terms of the GNU Library General Public
+  License as published by the Free Software Foundation; either
+  version 2 of the License, 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
+  Library General Public License for more details.
+
+  You should have received a copy of the GNU Library General Public
+  License along with this library; if not, write to the Free Software
+  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+*/
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <ctype.h>
+#include "misc.h"
+
+extern const char *progname;
+
+char *unquote(char *str)
+{
+	unsigned char *s, *t;
+
+	for (s = (unsigned char *)str; *s != '\0'; s++)
+		if (*s == '\\')
+			break;
+	if (*s == '\0')
+		return str;
+
+#define isoctal(c) \
+	((c) >= '0' && (c) <= '7')
+
+	t = s;
+	do {
+		if (*s == '\\' &&
+		    isoctal(*(s+1)) && isoctal(*(s+2)) && isoctal(*(s+3))) {
+			*t++ = ((*(s+1) - '0') << 6) +
+			       ((*(s+2) - '0') << 3) +
+			       ((*(s+3) - '0')     );
+			s += 3;
+		} else
+			*t++ = *s;
+	} while (*s++ != '\0');
+
+	return str;
+}