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

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

#include "libfdt_internal.h"

int fdt_setprop_inplace_namelen_partial(void *fdt, int nodeoffset,
                                        const char *name, int namelen,
                                        uint32_t idx, const void *val,
                                        int len)
{
        void *propval;
        int proplen;

        propval = fdt_getprop_namelen_w(fdt, nodeoffset, name, namelen,
                                        &proplen);
        if (!propval)
                return proplen;

        if ((unsigned)proplen < (len + idx))
                return -FDT_ERR_NOSPACE;

        memcpy((char *)propval + idx, val, len);
        return 0;
}

int fdt_setprop_inplace(void *fdt, int nodeoffset, const char *name,
                        const void *val, int len)
{
        const void *propval;
        int proplen;

        propval = fdt_getprop(fdt, nodeoffset, name, &proplen);
        if (!propval)
                return proplen;

        if (proplen != len)
                return -FDT_ERR_NOSPACE;

        return fdt_setprop_inplace_namelen_partial(fdt, nodeoffset, name,
                                                   strlen(name), 0,
                                                   val, len);
}

static void fdt_nop_region_(void *start, int len)
{
        fdt32_t *p;

        for (p = start; (char *)p < ((char *)start + len); p++)
                *p = cpu_to_fdt32(FDT_NOP);
}

int fdt_nop_property(void *fdt, int nodeoffset, const char *name)
{
        struct fdt_property *prop;
        int len;

        prop = fdt_get_property_w(fdt, nodeoffset, name, &len);
        if (!prop)
                return len;

        fdt_nop_region_(prop, len + sizeof(*prop));

        return 0;
}

int fdt_node_end_offset_(void *fdt, int offset)
{
        int depth = 0;

        while ((offset >= 0) && (depth >= 0))
                offset = fdt_next_node(fdt, offset, &depth);

        return offset;
}

int fdt_nop_node(void *fdt, int nodeoffset)
{
        int endoffset;

        endoffset = fdt_node_end_offset_(fdt, nodeoffset);
        if (endoffset < 0)
                return endoffset;

        fdt_nop_region_(fdt_offset_ptr_w(fdt, nodeoffset, 0),
                        endoffset - nodeoffset);
        return 0;
}