Adding upstream version 5.2.37.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

lib/glob/glob_loop.c

@@ -0,0 +1,84 @@
+/* Copyright (C) 1991-2020 Free Software Foundation, Inc.
+
+   This file is part of GNU Bash, the Bourne Again SHell.
+   
+   Bash 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 of the License, or
+   (at your option) any later version.
+
+   Bash 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 Bash.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+static int INTERNAL_GLOB_PATTERN_P PARAMS((const GCHAR *));
+
+/* Return nonzero if PATTERN has any special globbing chars in it.
+   Compiled twice, once each for single-byte and multibyte characters. */
+static int
+INTERNAL_GLOB_PATTERN_P (pattern)
+     const GCHAR *pattern;
+{
+  register const GCHAR *p;
+  register GCHAR c;
+  int bopen, bsquote;
+
+  p = pattern;
+  bopen = bsquote = 0;
+
+  while ((c = *p++) != L('\0'))
+    switch (c)
+      {
+      case L('?'):
+      case L('*'):
+	return 1;
+
+      case L('['):      /* Only accept an open brace if there is a close */
+	bopen++;        /* brace to match it.  Bracket expressions must be */
+	continue;       /* complete, according to Posix.2 */
+      case L(']'):
+	if (bopen)
+	  return 1;
+	continue;
+
+      case L('+'):         /* extended matching operators */
+      case L('@'):
+      case L('!'):
+	if (*p == L('('))  /*) */
+	  return 1;
+	continue;
+
+      case L('\\'):
+	/* Don't let the pattern end in a backslash (GMATCH returns no match
+	   if the pattern ends in a backslash anyway), but otherwise note that 
+	   we have seen this, since the matching engine uses backslash as an
+	   escape character and it can be removed. We return 2 later if we
+	   have seen only backslash-escaped characters, so interested callers
+	   know they can shortcut and just dequote the pathname. */
+	if (*p != L('\0'))
+	  {
+	    p++;
+	    bsquote = 1;
+	    continue;
+	  }
+	else 	/* (*p == L('\0')) */
+	  return 0;
+      }
+
+#if 0
+  return bsquote ? 2 : 0;
+#else
+  return (0);
+#endif
+}
+
+#undef INTERNAL_GLOB_PATTERN_P
+#undef L
+#undef INT
+#undef CHAR
+#undef GCHAR