tmpfs loading an image

src/components/volatileFilesystem.c

@@ -1,7 +1,5 @@
 #include "../neonucleus.h"
 
-// TODO: finish
-
 // Data structures
 
 typedef struct nn_vfnode {
@@ -556,7 +554,39 @@ nn_size_t nn_vfs_seek(nn_vfilesystem *fs, nn_vfhandle *handle, const char *whenc
     return handle->position;
 }
 
-// main funciton
+typedef struct nn_vfilesystemImage {
+	nn_vfilesystemImageNode *nodes;
+	nn_size_t ptr;
+} nn_vfilesystemImage;
+
+static nn_vfilesystemImageNode nni_vfsimg_nextNode(nn_vfilesystemImage *stream) {
+	nn_vfilesystemImageNode node = stream->nodes[stream->ptr];
+	stream->ptr++;
+	return node;
+}
+
+static nn_vfnode *nni_vfsimg_parseNode(nn_vfilesystem *fs, nn_vfilesystemImage *stream) {
+	// TODO: make this handle OOMs
+	nn_vfilesystemImageNode node = nni_vfsimg_nextNode(stream);
+	if(node.data == NULL) {
+		// directory!!!!!
+		nn_vfnode *dir = nn_vf_allocDirectory(fs, node.name);
+		dir->len = node.len;
+		for(int i = 0; i < node.len; i++) {
+			nn_vfnode *entry = nni_vfsimg_parseNode(fs, stream);
+			dir->entries[i] = entry;
+		}
+		return dir;
+	}
+	// file!!!!!
+	nn_vfnode *file = nn_vf_allocFile(fs, node.name);
+	nn_vf_ensureFileCapacity(file, node.len);
+	file->len = node.len;
+	nn_memcpy(file->data, node.data, node.len);
+	return file;
+}
+
+// constructor
 
 nn_filesystem *nn_volatileFilesystem(nn_Context *context, nn_vfilesystemOptions opts, nn_filesystemControl control) {
     // TODO: handle OOM
@@ -567,6 +597,20 @@ nn_filesystem *nn_volatileFilesystem(nn_Context *context, nn_vfilesystemOptions
     fs->birthday = time;
     fs->opts = opts;
     fs->root = nn_vf_allocDirectory(fs, "/");
+
+	if(opts.image != NULL) {
+		nn_vfilesystemImage stream = {
+			.nodes = opts.image,
+			.ptr = 0,
+		};
+		// we got supplied an image, shit
+		fs->root->len = opts.rootEntriesInImage;
+		for(int i = 0; i < opts.rootEntriesInImage; i++) {
+			nn_vfnode *entry = nni_vfsimg_parseNode(fs, &stream);
+			fs->root->entries[i] = entry;
+		}
+	}
+
     nn_filesystemTable table = {
         .userdata = fs,
         .deinit = (void *)nn_vfs_deinit,