/* This software is licensed by the Apache License 2.0, see LICENSE file */
/*                                       Copyright © 2022 Gregory Lirent */

#include "include.h"
#include "assert.h"

#ifndef LIBCDSB_SRC_INTERNAL_VNODE_H
#define LIBCDSB_SRC_INTERNAL_VNODE_H

#define is_permissible(T) (sizeof(void*) >= sizeof(T) && _Alignof(void*) >= _Alignof(T))

typedef void* vnode_t;

extern vnode_t libcdsb_builtin_vnode_create   (          var_t) wur__;
extern vnode_t libcdsb_builtin_vnode_create_ex(vtype xt, var_t) wur__;

extern var_t libcdsb_builtin_vnode_peek(const vnode_t* x, vtype type) pure__ wur__ Nonnull__(1);
extern void  libcdsb_builtin_vnode_free(      vnode_t* x, vtype type)              Nonnull__(1);

ainline(void libcdsb_builtin_vnode_attach(vnode_t* node, var_t value)) {
    if (value.type < VTYPE_STRING) {
        *node = libcdsb_builtin_vnode_create(value);
    } else if (sizeof(str_t) == sizeof(void*) && value.type == VTYPE_STRING) {
        *node = *(char**)value.pointer;
    } else {
        *node = malloc(vtype_size(value.type));
        memcpy(*node, value.pointer, vtype_size(value.type));
    }
}

ainline(void libcdsb_builtin_vnode_attach_ex(vnode_t* node, vtype target, var_t value)) {
    if (value.type < VTYPE_STRING) {
        *node = libcdsb_builtin_vnode_create_ex(target, value);
    } else {
        type_assert(target, value.type);

        if (sizeof(str_t) == sizeof(void*) && value.type == VTYPE_STRING) {
            *node = *(char**)value.pointer;
        } else {
            *node = malloc(vtype_size(value.type));
            memcpy(*node, value.pointer, vtype_size(value.type));
        }
    }
}

#define vnode_create    libcdsb_builtin_vnode_create
#define vnode_attach    libcdsb_builtin_vnode_attach
#define vnode_create_ex libcdsb_builtin_vnode_create_ex
#define vnode_attach_ex libcdsb_builtin_vnode_attach_ex

#define vnode_peek      libcdsb_builtin_vnode_peek
#define vnode_free      libcdsb_builtin_vnode_free

#define vnode_hash(n, t)              variable_hash(vnode_peek(n, t))
#define vnode_compare(s0, t0, s1, t1) variable_compare(vnode_peek(s0, t0), vnode_peek(s1, t1))
#define vnode_stringify(n, t)         variable_stringify(vnode_peek(n, t))

#define vnode_duplicate(n, t)        vnode_create(vnode_peek(n, t))
#define vnode_duplicate_ex(xt, n, t) vnode_create_ex(xt, vnode_peek(n, t))

#endif /* LIBCDSB_SRC_INTERNAL_VNODE_H */