1 files changed, 95 insertions, 0 deletions
diff --git a/src/mp3_subr.c b/src/mp3_subr.c
index a570139..03bc42b 100644
--- a/src/mp3_subr.c
+++ b/src/mp3_subr.c
@@ -1 +1,96 @@
 /* Miscellaneous subroutines for mp3fs. */
+#define FUSE_USE_VERSION 26
+#include <stdio.h>
+#include <errno.h>
+#include <string.h>
+#include <err.h>
+
+#include <sys/types.h>
+#include <dirent.h>
+#include <fuse.h>
+#include <sys/param.h>
+
+#include <id3.h>
+#include <mp3fs.h>
+
+/*
+ * Traverse a hierarchy given a directory path. Perform fileoperations on the
+ * files in the directory giving data as arguments, as well as recursing on
+ * sub-directories.
+ */
+void
+traverse_hierarchy(char *dirpath, traverse_fn_t fileop, void *data)
+{
+	DIR *dirp;
+	struct dirent *dp;
+	char filepath[MAXPATHLEN];
+	struct stat st;
+	struct filler_data *fd;
+
+	fd = data;
+	dirp = opendir(dirpath);
+	if (dirp == NULL) {
+		fd->filler(fd->buf, "lolerr", NULL, 0);
+		return;
+	}
+	
+	/* Loop through all files. */
+	while ((dp = readdir(dirp)) != NULL) {
+		if (!strcmp(dp->d_name, ".") ||
+		    !strcmp(dp->d_name, ".."))
+			continue;
+		
+		snprintf(filepath, sizeof(filepath), "%s/%s",
+		    dirpath, dp->d_name);
+		if (stat(filepath, &st) < 0)
+			err(1, "error doing stat on %s", filepath);
+		/* Recurse if it's a directory. */
+		if (st.st_mode & S_IFDIR)  {
+			traverse_hierarchy(filepath, fileop, data);
+			continue;
+		}
+		/* If it's a regular file, perform the operation. */
+		if (st.st_mode & S_IFREG) {
+			fileop(filepath, data);
+		}
+	}
+	closedir(dirp);
+}
+
+
+
+/* 
+ * Retrieve artist name given a file, and put in a buffer with a passed filler
+ * function
+ */
+void
+mp3_artist(char *filepath, void *data)
+{
+	struct filler_data *fd;
+	ID3Tag *tag;
+	ID3Frame *artist;
+	ID3Field *field;
+	fuse_fill_dir_t filler;
+	void *buf;
+	char name[MAXPATHLEN];
+
+	/* Retrieve the filler function and pointers. */
+	fd = (struct filler_data *)data;
+	filler = fd->filler;
+	buf = fd->buf;
+
+	/* Get the tag. */
+	tag = ID3Tag_New();
+	ID3Tag_Link(tag, filepath);
+	artist = ID3Tag_FindFrameWithID(tag, ID3FID_LEADARTIST);
+	if (artist == NULL)
+		return;
+	field = ID3Frame_GetField(artist, ID3FN_TEXT);
+	if (field == NULL)
+		return;
+	ID3Field_GetASCII(field, name, ID3Field_Size(field));
+	/* XXX: doesn't show up... why? */
+	filler(buf, name, NULL, 0);
+	ID3Tag_Delete(tag);
+	return;
+}