irmd: Add wildcarding of DIF names

This adds wildcarding of DIF names so that application developers can
for instance specify home.* to specify all home DIFs.

1 files changed, 70 insertions, 0 deletions

diff --git a/src/irmd/utils.c b/src/irmd/utils.c
new file mode 100644
index 00000000..9cc1dd2f
--- /dev/null
+++ b/src/irmd/utils.c
@@ -0,0 +1,70 @@
+/*
+ * Copyright (c) 1989, 1993, 1994
+ *      The Regents of the University of California.  All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * Guido van Rossum.
+ *
+ * Copyright (c) 2011 The FreeBSD Foundation
+ * All rights reserved.
+ * Portions of this software were developed by David Chisnall
+ * under sponsorship from the FreeBSD Foundation.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * wildcard_match is based on the fnmatch function from POSIX.2.
+ * Implementation based on that one from FreeBSD.
+ */
+
+int wildcard_match(const char * pattern, const char * string)
+{
+        char c;
+
+        /* For loop? Why not Zoidberg? */
+        for (;;) {
+                switch (c = *pattern++) {
+                case '\0':
+                        return (*string == '\0' ? 0 : -1);
+                case '*':
+                        c = *pattern;
+
+                        if (c == '\0')
+                                return 0;
+
+                        /* General case, use recursion. */
+                        while ((c = *string) != '\0') {
+                                if (!wildcard_match(pattern, string))
+                                        return 0;
+                                ++string;
+                        }
+                        return -1;
+                default:
+                        if (c != *string)
+                                return -1;
+                        string++;
+                        break;
+                }
+        }
+}