src/interp/mem/load.c


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/*
 * nanowasm, a tiny WebAssembly/Wasm interpreter
 * Copyright (C) 2023-2025  Xavier Del Campo Romero
 *
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at https://mozilla.org/MPL/2.0/.
 */

#include <nanowasm/nw.h>
#include <nw/interp.h>
#include <nw/mem.h>
#include <nw/log.h>

enum nw_state nwp_mem_load(const struct nw_mem_cfg *const cfg,
    struct nw_sm_io *const io, const nw_varuint32 offset, void *const user)
{
    void *const dst = (unsigned char *)io->buf + io->read;
    const int n = cfg->load(offset + io->read, dst, io->n - io->read, user);

    if (n < 0)
        return NW_FATAL;
    else if ((io->read += n) >= io->n)
        return NW_OK;

    return NW_AGAIN;
}