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-rw-r--r--src/archive/ArchiveLookup.cxx103
1 files changed, 103 insertions, 0 deletions
diff --git a/src/archive/ArchiveLookup.cxx b/src/archive/ArchiveLookup.cxx
new file mode 100644
index 000000000..53730c504
--- /dev/null
+++ b/src/archive/ArchiveLookup.cxx
@@ -0,0 +1,103 @@
+/*
+ * Copyright (C) 2003-2014 The Music Player Daemon Project
+ * http://www.musicpd.org
+ *
+ * This program 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 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#include "config.h" /* must be first for large file support */
+#include "ArchiveLookup.hxx"
+#include "ArchiveDomain.hxx"
+#include "Log.hxx"
+
+#include <string.h>
+#include <sys/stat.h>
+#include <errno.h>
+
+gcc_pure
+static char *
+FindSlash(char *p, size_t i)
+{
+ for (; i > 0; --i)
+ if (p[i] == '/')
+ return p + i;
+
+ return nullptr;
+}
+
+gcc_pure
+static const char *
+FindSuffix(const char *p, const char *i)
+{
+ for (; i > p; --i) {
+ if (*i == '.')
+ return i + 1;
+ }
+
+ return nullptr;
+}
+
+bool
+archive_lookup(char *pathname, const char **archive,
+ const char **inpath, const char **suffix)
+{
+ size_t idx = strlen(pathname);
+
+ char *slash = nullptr;
+
+ while (true) {
+ //try to stat if its real directory
+ struct stat st_info;
+ if (stat(pathname, &st_info) == -1) {
+ if (errno != ENOTDIR) {
+ FormatErrno(archive_domain,
+ "Failed to stat %s", pathname);
+ return false;
+ }
+ } else {
+ //is something found ins original path (is not an archive)
+ if (slash == nullptr)
+ return false;
+
+ //its a file ?
+ if (S_ISREG(st_info.st_mode)) {
+ //so the upper should be file
+ *archive = pathname;
+ *inpath = slash + 1;
+
+ //try to get suffix
+ *suffix = FindSuffix(pathname, slash - 1);
+ return true;
+ } else {
+ FormatError(archive_domain,
+ "Not a regular file: %s",
+ pathname);
+ return false;
+ }
+ }
+
+ //find one dir up
+ if (slash != nullptr)
+ *slash = '/';
+
+ slash = FindSlash(pathname, idx - 1);
+ if (slash == nullptr)
+ return false;
+
+ *slash = 0;
+ idx = slash - pathname;
+ }
+}
+