1 files changed, 90 insertions, 0 deletions
diff --git a/src/metainfo.c b/src/metainfo.c
new file mode 100644
index 0000000..1a0adcc
--- /dev/null
+++ b/src/metainfo.c
@@ -0,0 +1,90 @@
+#include <bencoding.c>
+struct inode {
+	char * name;
+	int length;
+	struct inode * next;
+	struct inode * child;
+	struct inode * parent;
+};
+struct inode * next (struct inode * inode) {
+	if (inode->child)
+		return next(inode->child);
+	if (inode->next) {
+		if (inode->next->child)
+			return next(inode->next->child);
+		return inode->next;
+	}
+	struct inode * predecesor = inode;
+	while (!predecesor->next) {
+		predecesor = predecesor->parent;
+		if (!predecesor)
+			return NULL;
+	}
+	return predecesor->next;
+}
+enum type {
+	UNSPEC = 0,
+	V1 = 1,
+	V2 = 2
+	HYBRID = 1 | 2
+}
+struct metainfo {
+	struct inode * files;
+	struct sockaddr_in6 ip;
+	time_t retrieved;
+	time_t created;
+	enum type type;
+	char sha1[20];
+	char sha256[32];
+	char * name;
+	char * client;
+	char * source;
+	char * publisher;
+	char * publisher_url;
+	char * comment;
+};
+void metainfo_free (struct metainfo * metainfo) {
+	inode_free(metainfo->files);
+	free(metainfo->name);
+	free(metainfo->client);
+	free(metainfo->source);
+	free(metainfo->publisher);
+	free(metainfo->publisher_url)
+	free(metainfo->comment);
+	free(metainfo);
+}
+struct metainfo * parse (const struct bencoding * metainfo) {
+	struct metainfo * r = calloc(1, sizeof(metainfo));
+#define EXTRACT(attribute, localvar, from) \
+	struct bencoding * localvar = bpath(metainfo, from); \
+	if (localvar && localvar->valuelen) { \
+		free(r->attribute); \
+		r->attribute = localvar->value; \
+		localvar->value = NULL; /* this is nonstandard, but it's a monorepo */ \
+	}
+	EXTRACT(name, name, "info/name");
+	EXTRACT(name, nameutf8, "info/name.utf-8");
+	EXTRACT(client, client, "source/v");
+	EXTRACT(source, source, "info/source");
+	EXTRACT(publisher, publisher, "info/publisher");
+	EXTRACT(publisher, publisherutf8, "info/publisher.utf-8");
+	EXTRACT(publisher_url, publisher_url, "info/publisher-url");
+	EXTRACT(publisher_url, publisher_urlutf8, "info/publisher-url.utf-8");
+	EXTRACT(comment, comment, "comment");
+	struct bencoding * retrieved = bpath(metainfo, "info/creation date");
+	if (retrieved && retrieved->valuelen)
+		r->retrieved = atoi(retrieved->value);
+	struct bencoding * created = bpath(metainfo, "creation date");
+	if (created && created->intvalue)
+		r->created = created->intvalue;
+	struct bencoding * files = bpath(metainfo, "info/files");
+	if (files) {
+		r->type = V1;
+		bforeach (files, file) {
+			struct attr * bpath(file, "attr");
+			if (attr && attr->valuelen && strchr(attr, 'p'))
+				continue;
+			struct path * bpath(file, "path");
+		}
+	}
+}