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use binaryninjacore_sys::*;
use crate::binaryview::BinaryView;
use crate::Endianness;
use std::io::{Seek, SeekFrom, Write};
pub struct BinaryWriter {
handle: *mut BNBinaryWriter,
}
impl BinaryWriter {
pub fn new(view: &BinaryView, endian: Endianness) -> Self {
let handle = unsafe { BNCreateBinaryWriter(view.handle) };
unsafe {
BNSetBinaryWriterEndianness(handle, endian);
}
Self { handle }
}
pub fn endian(&self) -> Endianness {
unsafe { BNGetBinaryWriterEndianness(self.handle) }
}
pub fn set_endian(&self, endian: Endianness) {
unsafe { BNSetBinaryWriterEndianness(self.handle, endian) }
}
pub fn offset(&self) -> u64 {
unsafe { BNGetWriterPosition(self.handle) }
}
}
impl Seek for BinaryWriter {
fn seek(&mut self, pos: SeekFrom) -> std::io::Result<u64> {
unsafe {
match pos {
SeekFrom::Current(offset) => BNSeekBinaryWriterRelative(self.handle, offset),
SeekFrom::Start(offset) => BNSeekBinaryWriter(self.handle, offset),
_ => {
return Err(std::io::Error::new(
std::io::ErrorKind::Unsupported,
"Cannot seek end of BinaryWriter",
))
}
};
}
Ok(self.offset())
}
}
impl Write for BinaryWriter {
fn write(&mut self, buf: &[u8]) -> std::io::Result<usize> {
let len = buf.len();
let result = unsafe { BNWriteData(self.handle, buf.as_ptr() as *mut _, len) };
if !result {
Err(std::io::Error::new(
std::io::ErrorKind::Other,
"write out of bounds",
))
} else {
Ok(len)
}
}
fn flush(&mut self) -> std::io::Result<()> {
Ok(())
}
}
impl Drop for BinaryWriter {
fn drop(&mut self) {
unsafe { BNFreeBinaryWriter(self.handle) }
}
}
unsafe impl Sync for BinaryWriter {}
unsafe impl Send for BinaryWriter {}