1 files changed, 114 insertions, 0 deletions
diff --git a/sys/objdir.c b/sys/objdir.c
new file mode 100644
index 0000000..c448e85
--- /dev/null
+++ b/sys/objdir.c
@@ -0,0 +1,114 @@
+#include "api/error.h"
+#include "arch/x86_64/hal/obj.h"
+#include "hal/memory.h"
+#include "hal/obj.h"
+#include "lib/string.h"
+#include "jove.h"
+#include <errno.h>
+
+int
+objdir_new(jove_owned_obj_t *untyped_obj)
+{
+    jove_untyped_t *untyped = obj_deref(untyped_obj);
+    if((uintptr_t)untyped & (JOVE_OBJDIR_SIZE - 1)) return -EALIGN;
+    if(untyped->limit != JOVE_OBJDIR_SIZE) return -EBADSIZE;
+
+    memset(untyped, 0, JOVE_OBJDIR_SIZE);
+    obj_settype(untyped_obj, JOVE_OBJ_OBJDIR);
+    return 0;
+}
+
+jove_obj_t
+objdir_peeklocal(
+        jove_owned_obj_t *objdir_obj, 
+        uint16_t entry)
+{
+    if(obj_gettype(objdir_obj) != JOVE_OBJ_OBJDIR) {
+        errno = EBADOBJ;
+        return (jove_obj_t) { 0 };
+    }
+    if(entry >= JOVE_OBJDIR_ENTRIES) {
+        errno = EBADPATH;
+        return (jove_obj_t) { 0 };
+    }
+
+    jove_objdir_t *objtab = obj_deref(objdir_obj);
+    return objtab->entries[entry];
+}
+
+jove_owned_obj_t*
+objdir_getlocal(
+        jove_owned_obj_t *objdir_obj, 
+        uint16_t entry)
+{
+    if(obj_gettype(objdir_obj) != JOVE_OBJ_OBJDIR) {
+        reterr(EBADOBJ);
+    }
+    if(entry >= JOVE_OBJDIR_ENTRIES) {
+        reterr(EBADPATH);
+    }
+
+    jove_objdir_t *objtab = obj_deref(objdir_obj);
+    return obj_take(&objtab->entries[entry]);
+}
+
+jove_owned_obj_t*
+objdir_trygetlocal(
+        jove_owned_obj_t *objdir_obj, 
+        uint16_t entry)
+{
+    if(obj_gettype(objdir_obj) != JOVE_OBJ_OBJDIR) {
+        reterr(EBADOBJ);
+    }
+    if(entry >= JOVE_OBJDIR_ENTRIES) {
+        reterr(EBADPATH);
+    }
+
+    jove_objdir_t *objtab = obj_deref(objdir_obj);
+    return obj_trytake(&objtab->entries[entry]);
+}
+
+jove_owned_obj_t*
+objdir_getobj(
+        jove_owned_obj_t *objdir_obj, 
+        const uint16_t *path, 
+        size_t path_len)
+{
+    errno = 0;
+    if(path_len == 0) {
+        return objdir_obj;
+    }
+    {
+        jove_owned_obj_t *child_objdir = objdir_getlocal(objdir_obj, path[0]);
+        if(child_objdir == 0) {
+            reterr(EBADPATH);
+        }
+
+        jove_owned_obj_t *target_obj = objdir_getobj(child_objdir, path + 1, path_len - 1);
+        obj_release(child_objdir);
+        return target_obj;
+    }
+}
+
+jove_owned_obj_t*
+objdir_trygetobj(
+        jove_owned_obj_t *objdir_obj, 
+        const uint16_t *path, 
+        size_t path_len)
+{
+    errno = 0;
+    if(path_len == 0) {
+        return objdir_obj;
+    }
+    {
+        jove_owned_obj_t *child_objdir = objdir_trygetlocal(objdir_obj, path[0]);
+        if(child_objdir == 0) {
+            return 0;
+        }
+
+        jove_owned_obj_t *target_obj = objdir_trygetobj(child_objdir, path + 1, path_len - 1);
+        obj_release(child_objdir);
+        return target_obj;
+    }
+}
+