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use std::fmt;
use std::borrow::Borrow;
use std::ops::Deref;
use std::ffi::{CStr, CString};
use std::os::raw;
use std::mem;
use crate::rc::*;
#[derive(PartialEq, Eq, PartialOrd, Ord, Hash, Debug)]
#[repr(C)]
pub struct BnStr {
raw: [u8]
}
impl BnStr {
pub(crate) unsafe fn from_raw<'a>(ptr: *const raw::c_char) -> &'a Self {
mem::transmute(CStr::from_ptr(ptr).to_bytes_with_nul())
}
pub fn as_str(&self) -> &str {
self.as_cstr().to_str().unwrap()
}
pub fn as_cstr(&self) -> &CStr {
unsafe { CStr::from_bytes_with_nul_unchecked(&self.raw) }
}
}
impl Deref for BnStr {
type Target = str;
fn deref(&self) -> &str {
self.as_str()
}
}
impl AsRef<[u8]> for BnStr {
fn as_ref(&self) -> &[u8] {
&self.raw
}
}
impl AsRef<str> for BnStr {
fn as_ref(&self) -> &str {
self.as_str()
}
}
impl Borrow<str> for BnStr {
fn borrow(&self) -> &str {
self.as_str()
}
}
impl fmt::Display for BnStr {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
write!(f, "{}", self.as_cstr().to_string_lossy())
}
}
#[repr(C)]
pub struct BnString {
raw: *mut raw::c_char,
}
/// A nul-terminated C string allocated by the core.
///
/// Received from a variety of core function calls, and
/// must be used when giving strings to the core from many
/// core-invoked callbacks.
impl BnString {
pub fn new<S: BnStrCompatible>(s: S) -> Self {
use binaryninjacore_sys::BNAllocString;
let raw = s.as_bytes_with_nul();
unsafe {
let ptr = raw.as_ref().as_ptr() as *mut _;
Self { raw: BNAllocString(ptr) }
}
}
pub(crate) unsafe fn from_raw(raw: *mut raw::c_char) -> Self {
Self { raw }
}
pub(crate) fn into_raw(self) -> *mut raw::c_char {
let res = self.raw;
// we're surrendering ownership over the *mut c_char to
// the core, so ensure we don't free it
mem::forget(self);
res
}
}
impl Drop for BnString {
fn drop(&mut self) {
use binaryninjacore_sys::BNFreeString;
unsafe {
BNFreeString(self.raw);
}
}
}
impl Deref for BnString {
type Target = BnStr;
fn deref(&self) -> &BnStr {
unsafe { BnStr::from_raw(self.raw) }
}
}
impl AsRef<[u8]> for BnString {
fn as_ref(&self) -> &[u8] {
self.as_cstr().to_bytes_with_nul()
}
}
impl fmt::Display for BnString {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
write!(f, "{}", self.as_cstr().to_string_lossy())
}
}
unsafe impl CoreOwnedArrayProvider for BnString {
type Raw = *mut raw::c_char;
type Context = ();
unsafe fn free(raw: *mut Self::Raw, count: usize, _context: &Self::Context) {
use binaryninjacore_sys::BNFreeStringList;
BNFreeStringList(raw, count);
}
}
unsafe impl<'a> CoreOwnedArrayWrapper<'a> for BnString {
type Wrapped = &'a BnStr;
unsafe fn wrap_raw(raw: &'a Self::Raw, _context: &'a Self::Context) -> Self::Wrapped {
BnStr::from_raw(*raw)
}
}
pub unsafe trait BnStrCompatible {
type Result: AsRef<[u8]>;
fn as_bytes_with_nul(self) -> Self::Result;
}
unsafe impl<'a> BnStrCompatible for &'a BnStr {
type Result = &'a [u8];
fn as_bytes_with_nul(self) -> Self::Result {
self.as_cstr().to_bytes_with_nul()
}
}
unsafe impl BnStrCompatible for BnString {
type Result = Self;
fn as_bytes_with_nul(self) -> Self::Result {
self
}
}
unsafe impl<'a> BnStrCompatible for &'a CStr {
type Result = &'a [u8];
fn as_bytes_with_nul(self) -> Self::Result {
self.to_bytes_with_nul()
}
}
unsafe impl BnStrCompatible for CString {
type Result = Vec<u8>;
fn as_bytes_with_nul(self) -> Self::Result {
self.into_bytes_with_nul()
}
}
unsafe impl<'a> BnStrCompatible for &'a str {
type Result = Vec<u8>;
fn as_bytes_with_nul(self) -> Self::Result {
let ret = CString::new(self).expect("can't pass strings with internal nul bytes to core!");
ret.into_bytes_with_nul()
}
}
unsafe impl BnStrCompatible for String {
type Result = Vec<u8>;
fn as_bytes_with_nul(self) -> Self::Result {
let ret = CString::new(self).expect("can't pass strings with internal nul bytes to core!");
ret.into_bytes_with_nul()
}
}
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