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-rw-r--r--lib/glob/glob_loop.c84
1 files changed, 84 insertions, 0 deletions
diff --git a/lib/glob/glob_loop.c b/lib/glob/glob_loop.c
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--- /dev/null
+++ b/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