wasmparser/readers/core/
init.rs

1/* Copyright 2018 Mozilla Foundation
2 *
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at
6 *
7 *     http://www.apache.org/licenses/LICENSE-2.0
8 *
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
14 */
15
16use crate::{BinaryReader, FromReader, OperatorsReader, Result};
17use core::fmt;
18
19/// Represents an initialization expression.
20#[derive(Clone)]
21pub struct ConstExpr<'a> {
22    reader: BinaryReader<'a>,
23}
24
25impl PartialEq for ConstExpr<'_> {
26    fn eq(&self, other: &Self) -> bool {
27        self.reader.remaining_buffer() == other.reader.remaining_buffer()
28    }
29}
30
31impl Eq for ConstExpr<'_> {}
32
33impl<'a> ConstExpr<'a> {
34    /// Constructs a new `ConstExpr` from the given data and offset.
35    pub fn new(reader: BinaryReader<'a>) -> ConstExpr<'a> {
36        ConstExpr { reader }
37    }
38
39    /// Gets a binary reader for the initialization expression.
40    pub fn get_binary_reader(&self) -> BinaryReader<'a> {
41        self.reader.clone()
42    }
43
44    /// Gets an operators reader for the initialization expression.
45    pub fn get_operators_reader(&self) -> OperatorsReader<'a> {
46        OperatorsReader::new(self.get_binary_reader())
47    }
48}
49
50impl<'a> FromReader<'a> for ConstExpr<'a> {
51    fn from_reader(reader: &mut BinaryReader<'a>) -> Result<Self> {
52        // FIXME(#188) ideally shouldn't need to skip here
53        let reader = reader.skip(|r| r.skip_const_expr())?;
54        Ok(ConstExpr { reader })
55    }
56}
57
58impl fmt::Debug for ConstExpr<'_> {
59    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
60        f.debug_struct("ConstExpr")
61            .field("offset", &self.reader.original_position())
62            .field("data", &self.reader.remaining_buffer())
63            .finish()
64    }
65}
wasmparser/readers/core/init.rs

wasmparser/readers/core/
init.rs
