rt-thread-official/components/drivers/ofw/libfdt/fdt_strerror.c

// SPDX-License-Identifier: (GPL-2.0-or-later OR BSD-2-Clause)
/*
 * libfdt - Flat Device Tree manipulation
 * Copyright (C) 2006 David Gibson, IBM Corporation.
 *     EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
#include "libfdt_env.h"

#include <fdt.h>
#include <libfdt.h>

#include "libfdt_internal.h"

struct fdt_errtabent {
    const char *str;
};

#define FDT_ERRTABENT(val) \
    [(val)] = { .str = #val, }

static struct fdt_errtabent fdt_errtable[] = {
    FDT_ERRTABENT(FDT_ERR_NOTFOUND),
    FDT_ERRTABENT(FDT_ERR_EXISTS),
    FDT_ERRTABENT(FDT_ERR_NOSPACE),

    FDT_ERRTABENT(FDT_ERR_BADOFFSET),
    FDT_ERRTABENT(FDT_ERR_BADPATH),
    FDT_ERRTABENT(FDT_ERR_BADPHANDLE),
    FDT_ERRTABENT(FDT_ERR_BADSTATE),

    FDT_ERRTABENT(FDT_ERR_TRUNCATED),
    FDT_ERRTABENT(FDT_ERR_BADMAGIC),
    FDT_ERRTABENT(FDT_ERR_BADVERSION),
    FDT_ERRTABENT(FDT_ERR_BADSTRUCTURE),
    FDT_ERRTABENT(FDT_ERR_BADLAYOUT),
    FDT_ERRTABENT(FDT_ERR_INTERNAL),
    FDT_ERRTABENT(FDT_ERR_BADNCELLS),
    FDT_ERRTABENT(FDT_ERR_BADVALUE),
    FDT_ERRTABENT(FDT_ERR_BADOVERLAY),
    FDT_ERRTABENT(FDT_ERR_NOPHANDLES),
    FDT_ERRTABENT(FDT_ERR_BADFLAGS),
    FDT_ERRTABENT(FDT_ERR_ALIGNMENT),
};
#define FDT_ERRTABSIZE  ((int)(sizeof(fdt_errtable) / sizeof(fdt_errtable[0])))

const char *fdt_strerror(int errval)
{
    if (errval > 0)
        return "<valid offset/length>";
    else if (errval == 0)
        return "<no error>";
    else if (-errval < FDT_ERRTABSIZE) {
        const char *s = fdt_errtable[-errval].str;

        if (s)
            return s;
    }

    return "<unknown error>";
}