Imported Upstream version 93u+upstream

1 files changed, 67 insertions, 0 deletions

diff --git a/src/lib/libast/string/stresc.c b/src/lib/libast/string/stresc.c
new file mode 100644
index 0000000..59ec6c9
--- /dev/null
+++ b/src/lib/libast/string/stresc.c
@@ -0,0 +1,67 @@
+/***********************************************************************
+*                                                                      *
+*               This software is part of the ast package               *
+*          Copyright (c) 1985-2011 AT&T Intellectual Property          *
+*                      and is licensed under the                       *
+*                 Eclipse Public License, Version 1.0                  *
+*                    by AT&T Intellectual Property                     *
+*                                                                      *
+*                A copy of the License is available at                 *
+*          http://www.eclipse.org/org/documents/epl-v10.html           *
+*         (with md5 checksum b35adb5213ca9657e911e9befb180842)         *
+*                                                                      *
+*              Information and Software Systems Research               *
+*                            AT&T Research                             *
+*                           Florham Park NJ                            *
+*                                                                      *
+*                 Glenn Fowler <gsf@research.att.com>                  *
+*                  David Korn <dgk@research.att.com>                   *
+*                   Phong Vo <kpv@research.att.com>                    *
+*                                                                      *
+***********************************************************************/
+#pragma prototyped
+/*
+ * Glenn Fowler
+ * AT&T Research
+ *
+ * convert \X character constants in s in place
+ * the length of the converted s is returned (may have embedded \0's)
+ * wide chars absent locale guidance default to UTF-8
+ * strexp() FMT_EXP_* flags passed to chrexp() for selective conversion
+ */
+
+#include <ast.h>
+
+int
+strexp(register char* s, int flags)
+{
+	register char*		t;
+	register unsigned int	c;
+	char*			b;
+	char*			e;
+	int			w;
+
+	b = t = s;
+	while (c = *s++)
+	{
+		if (c == '\\')
+		{
+			c = chrexp(s - 1, &e, &w, flags);
+			s = e;
+			if (w)
+			{
+				t += mbwide() ? mbconv(t, c) : wc2utf8(t, c);
+				continue;
+			}
+		}
+		*t++ = c;
+	}
+	*t = 0;
+	return t - b;
+}
+
+int
+stresc(register char* s)
+{
+	return strexp(s, FMT_EXP_CHAR|FMT_EXP_LINE|FMT_EXP_WIDE);
+}