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/*
* nanowasm, a tiny WebAssembly/Wasm interpreter
* Copyright (C) 2023-2024 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 <nw/log.h>
#include <nw/sections.h>
#include <nw/types.h>
#include <errno.h>
#include <stddef.h>
#include <stdio.h>
#include <stdint.h>
#include <string.h>
int check_resizable_limits(FILE *const f, struct resizable_limits *const r)
{
varuint1 flags;
varuint32 initial;
*r = (const struct resizable_limits){0};
if (varuint1_read(f, &flags))
{
LOG("%s: varuint1_read failed\n", __func__);
return -1;
}
else if (varuint32_read(f, &initial))
{
LOG("%s: varuint32_read failed\n", __func__);
return -1;
}
if (flags)
{
varuint32 maximum;
if (varuint32_read(f, &maximum))
{
LOG("%s: varuint32_read failed\n", __func__);
return -1;
}
r->max = maximum;
r->max_available = true;
}
static const unsigned long page_size = 64lu * 1024lu;
if (initial > UINT32_MAX / page_size)
{
LOG("%s: initial size (%lu) overflow \n", __func__,
(unsigned long)initial);
return 1;
}
r->sz = initial * page_size;
return 0;
}
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