wasmparser 0.96.0

A simple event-driven library for parsing WebAssembly binary files.
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42

/* Copyright 2018 Mozilla Foundation
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

use crate::{BinaryReader, FromReader, Result, SectionLimited, TableType};

/// A reader for the table section of a WebAssembly module.
pub type TableSectionReader<'a> = SectionLimited<'a, TableType>;

impl<'a> FromReader<'a> for TableType {
    fn from_reader(reader: &mut BinaryReader<'a>) -> Result<Self> {
        let element_type = reader.read()?;
        let has_max = match reader.read_u8()? {
            0x00 => false,
            0x01 => true,
            _ => {
                bail!(
                    reader.original_position() - 1,
                    "invalid table resizable limits flags",
                )
            }
        };
        let initial = reader.read()?;
        let maximum = if has_max { Some(reader.read()?) } else { None };
        Ok(TableType {
            element_type,
            initial,
            maximum,
        })
    }
}