56 lines
1.2 KiB
Rust
56 lines
1.2 KiB
Rust
use std::io::Read;
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use std::fs::File;
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use Result;
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use binread::BinReadable;
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pub struct IJVMReader {
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pointer: usize,
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source: Vec<u8>
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}
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impl IJVMReader {
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pub fn new(path: &str) -> Result<IJVMReader> {
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let file = match File::open(path) {
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Ok(file) => file,
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Err(_) => return Err("Could not open file"),
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};
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let abc: Vec<u8> = file.bytes().map(|e| e.unwrap()).collect();
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Ok(IJVMReader {
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pointer: 0,
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source: abc
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})
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}
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pub fn new_from_slice(source: &[u8]) -> IJVMReader {
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IJVMReader {
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pointer: 0,
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source: source.to_vec(),
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}
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}
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}
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impl BinReadable for IJVMReader {
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fn get(&mut self) -> Result<u8> {
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if self.pointer >= self.source.len() {
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return Err("EOF reached")
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}
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let byte = self.source[self.pointer];
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self.pointer += 1;
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Ok(byte)
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}
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fn cur(&self) -> usize {
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self.pointer
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}
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fn len(&self) -> usize {
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self.source.len()
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}
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fn slice(&mut self, len: usize) -> &[u8] {
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let slice = &self.source[self.pointer..self.pointer+len];
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self.pointer += len;
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slice
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}
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}
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