new archive api, input_archive stream

1 files changed, 111 insertions, 0 deletions

diff --git a/src/archive_api.c b/src/archive_api.c
new file mode 100644
index 000000000..ddbcc43b3
--- /dev/null
+++ b/src/archive_api.c
@@ -0,0 +1,111 @@
+/* the Music Player Daemon (MPD)
+ * Copyright (C) 2008 Viliam Mateicka <viliam.mateicka@gmail.com>
+ * This project's homepage is: 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+
+#include <stdio.h>
+
+#include <string.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <unistd.h>
+#include <errno.h>
+#include <glib.h>
+
+#include "utils.h"
+#include "archive_api.h"
+
+/**
+ *
+ * archive_lookup is used to determine if part of pathname refers to an regular
+ * file (archive). If so then its also used to split pathname into archive file
+ * and path used to locate file in archive. It also returns suffix of the file.
+ * How it works:
+ * We do stat of the parent of input pathname as long as we find an regular file
+ * Normally this should never happen. When routine returns true pathname modified
+ * and split into archive, inpath and suffix. Otherwise nothing happens
+ *
+ * For example:
+ *
+ * /music/path/Talco.zip/Talco - Combat Circus/12 - A la pachenka.mp3
+ * is split into archive:	/music/path/Talco.zip
+ * inarchive pathname:		Talco - Combat Circus/12 - A la pachenka.mp3
+ * and suffix:			 zip
+ */
+
+bool archive_lookup(char *pathname, char **archive, char **inpath, char **suffix)
+{
+	char *pathdupe;
+	int len, idx;
+	struct stat st_info;
+	bool ret = false;
+
+	*archive = NULL;
+	*inpath = NULL;
+	*suffix = NULL;
+
+	pathdupe = g_strdup(pathname);
+	len = idx = strlen(pathname);
+
+	while (idx > 0) {
+		//try to stat if its real directory
+		if (stat(pathdupe, &st_info) == -1) {
+			if (errno != ENOTDIR) {
+				g_warning("stat %s failed (errno=%d)\n", pathdupe, errno);
+				break;
+			}
+		} else {
+			//is something found ins original path (is not an archive)
+			if (idx == len) {
+				break;
+			}
+			//its a file ?
+			if (S_ISREG(st_info.st_mode)) {
+				//so the upper should be file
+				pathname[idx] = 0;
+				ret = true;
+				*archive = pathname;
+				*inpath = pathname + idx+1;
+
+				//try to get suffix
+				*suffix = NULL;
+				while (idx > 0) {
+					if (pathname[idx] == '.') {
+						*suffix = pathname + idx + 1;
+						break;
+					}
+					idx--;
+				}
+				break;
+			} else {
+				g_warning("not a regular file %s\n", pathdupe);
+				break;
+			}
+		}
+		//find one dir up
+		while (idx > 0) {
+			if (pathdupe[idx] == '/') {
+				pathdupe[idx] = 0;
+				break;
+			}
+			idx--;
+		}
+	}
+	g_free(pathdupe);
+	return ret;
+}
+