Beginning of a VFS implemented. C++ is great.

1 files changed, 55 insertions, 0 deletions

diff --git a/src/kernel/vfs/vdir.cpp b/src/kernel/vfs/vdir.cpp
new file mode 100644
index 0000000..299c0e7
--- /dev/null
+++ b/src/kernel/vfs/vdir.cpp
@@ -0,0 +1,55 @@
+#include "vdir.h"
+
+vdir::vdir(node* parent) : node(parent, FT_DIR), children(8, 64) {
+	children.add(new vdir_child(".", this));
+	child_count = 1;
+
+	if (parent != 0) {
+		children.add(new vdir_child("..", parent));
+		child_count++;
+	}
+}
+
+node* vdir::get_child(char* name) {
+	for (unsigned i = 0; i < child_count; i++) {
+		vdir_child *c = children.at(i);
+		ASSERT(c != 0);
+		if (strcmp(c->name, name) == 0) return c->el;
+	}
+	return 0;
+}
+
+int vdir::read(size_t offset, size_t len, char* buffer) {
+	if (offset >= child_count) return 0;
+	vdir_child *c = children.at(offset);
+	ASSERT(c != 0);
+	size_t nlen = strlen(c->name);
+	if (len <= nlen) {
+		return E_TOO_SHORT;
+	}
+	strcpy(buffer, c->name);
+	return nlen;
+}
+
+int vdir::write(size_t offset, size_t len, char* buffer) {
+	// rename file
+	if (offset >= child_count) return E_INVALID_RANGE;
+	vdir_child *c = children.at(offset);
+	ASSERT(c != 0);
+	if (len == 0) return E_INVALID;
+	kfree(c->name);
+	c->name = (char*)kmalloc(len + 1);
+	for (unsigned i = 0; i < len; i++) c->name[i] = buffer[i];
+	c->name[len] = 0;
+	return len;
+}
+
+size_t vdir::get_size() {
+	return child_count;
+}
+
+int vdir::add_child(char* name, node *child) {
+	ASSERT((int)child_count == children.add(new vdir_child(name, child)));
+	child_count++;
+	return 0;
+}