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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
use std::{
alloc::{alloc, dealloc, Layout},
ffi::{c_char, OsString},
mem::align_of,
os::unix::ffi::OsStringExt,
};
use crate::{errors::MessageError, BreakpadString};
use super::BreakpadChar;
// BreakpadString implementation for regular 8-byte per character strings
impl BreakpadString for OsString {
fn serialize(&self) -> Vec<u8> {
<OsString as Clone>::clone(self).into_vec()
}
fn deserialize(bytes: &[u8]) -> Result<OsString, MessageError> {
Ok(OsString::from_vec(bytes.to_owned()))
}
unsafe fn from_ptr(ptr: *const BreakpadChar) -> OsString {
let chars = array_from_c_char_string(ptr);
OsString::from_vec(chars)
}
fn into_raw(self) -> *mut BreakpadChar {
let chars: Vec<u8> = self.into_vec();
let layout = Layout::from_size_align(chars.len(), align_of::<u8>())
.expect("Impossible layout for raw string");
unsafe {
let raw_chars = alloc(layout);
chars
.as_ptr()
.copy_to_nonoverlapping(raw_chars, chars.len());
raw_chars as *mut BreakpadChar
}
}
unsafe fn from_raw(ptr: *mut BreakpadChar) -> OsString {
let chars = array_from_c_char_string(ptr);
let layout = Layout::from_size_align(chars.len(), align_of::<u8>())
.expect("Impossible layout for raw string");
dealloc(ptr as *mut u8, layout);
OsString::from_vec(chars)
}
}
/// Read a nul-terminated C string pointed to by `ptr` and store its
/// characters into an array, including the trailing nul character.
///
/// # Safety
///
/// The `ptr` argument must point to a valid nul-terminated C string.
unsafe fn array_from_c_char_string(ptr: *const c_char) -> Vec<u8> {
std::ffi::CStr::from_ptr(ptr).to_bytes_with_nul().to_owned()
}