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2720 lines (2512 loc) · 80.1 KB
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use alloc::borrow::Cow;
use core::ffi::{
CStr, c_char, c_double, c_float, c_int, c_long, c_longlong, c_schar, c_short, c_uchar, c_uint,
c_ulong, c_ulonglong, c_ushort, c_void,
};
#[cfg(all(
any(
target_os = "linux",
target_os = "macos",
target_os = "windows",
target_os = "android"
),
not(any(target_env = "musl", target_env = "sgx"))
))]
use libffi::middle::Type;
#[cfg(all(
any(
target_os = "linux",
target_os = "macos",
target_os = "windows",
target_os = "android"
),
not(any(target_env = "musl", target_env = "sgx"))
))]
use libffi::{
low,
middle::{Arg, Cif, Closure, CodePtr},
};
#[cfg(any(unix, windows))]
use libloading::Library;
#[cfg(unix)]
use libloading::os::unix::Library as UnixLibrary;
#[cfg(any(unix, windows))]
use parking_lot::{Mutex, RwLock};
use rustpython_wtf8::Wtf8;
use rustpython_wtf8::Wtf8Buf;
#[cfg(any(unix, windows))]
use std::{collections::HashMap, ffi::OsStr, sync::OnceLock};
#[cfg(all(
any(
target_os = "linux",
target_os = "macos",
target_os = "windows",
target_os = "android"
),
not(any(target_env = "musl", target_env = "sgx"))
))]
pub type FfiType = Type;
#[cfg(all(
any(
target_os = "linux",
target_os = "macos",
target_os = "windows",
target_os = "android"
),
not(any(target_env = "musl", target_env = "sgx"))
))]
pub type FfiArg<'a> = Arg<'a>;
#[cfg(all(
any(
target_os = "linux",
target_os = "macos",
target_os = "windows",
target_os = "android"
),
not(any(target_env = "musl", target_env = "sgx"))
))]
pub type FfiCodePtr = CodePtr;
#[cfg(all(
any(
target_os = "linux",
target_os = "macos",
target_os = "windows",
target_os = "android"
),
not(any(target_env = "musl", target_env = "sgx"))
))]
pub type FfiCif = low::ffi_cif;
#[cfg(all(
any(
target_os = "linux",
target_os = "macos",
target_os = "windows",
target_os = "android"
),
not(any(target_env = "musl", target_env = "sgx"))
))]
type CallbackIntResult = low::ffi_arg;
#[cfg(not(all(
any(
target_os = "linux",
target_os = "macos",
target_os = "windows",
target_os = "android"
),
not(any(target_env = "musl", target_env = "sgx"))
)))]
type CallbackIntResult = c_int;
#[cfg(any(unix, windows, target_os = "wasi"))]
pub type WChar = libc::wchar_t;
#[cfg(not(any(unix, windows, target_os = "wasi")))]
pub type WChar = u32;
#[cfg(any(unix, windows, target_os = "wasi"))]
type TimeT = libc::time_t;
#[cfg(not(any(unix, windows, target_os = "wasi")))]
type TimeT = i64;
std::thread_local! {
/// Thread-local ctypes errno, separate from the platform errno.
#[allow(clippy::missing_const_for_thread_local)]
static CTYPES_LOCAL_ERRNO: core::cell::Cell<i32> = const { core::cell::Cell::new(0) };
}
pub fn get_errno() -> i32 {
CTYPES_LOCAL_ERRNO.with(|e| e.get())
}
pub fn set_errno(value: i32) -> i32 {
CTYPES_LOCAL_ERRNO.with(|e| {
let old = e.get();
e.set(value);
old
})
}
#[cfg(not(windows))]
pub fn with_swapped_errno<F, R>(f: F) -> R
where
F: FnOnce() -> R,
{
let saved_errno = crate::os::get_errno();
let saved_ctypes_errno = CTYPES_LOCAL_ERRNO.with(|e| e.get());
crate::os::set_errno(saved_ctypes_errno);
let result = f();
let new_error = crate::os::get_errno();
CTYPES_LOCAL_ERRNO.with(|e| e.set(new_error));
crate::os::set_errno(saved_errno);
result
}
pub fn with_callback_errno_preserved<F, R>(use_errno: bool, f: F) -> R
where
F: FnOnce() -> R,
{
if !use_errno {
return f();
}
let saved = crate::os::get_errno();
let result = f();
let _current = crate::os::get_errno();
crate::os::set_errno(saved);
result
}
#[cfg(windows)]
std::thread_local! {
/// Thread-local ctypes last_error, separate from the Windows last error.
static CTYPES_LOCAL_LAST_ERROR: core::cell::Cell<u32> = const { core::cell::Cell::new(0) };
}
#[cfg(windows)]
pub fn get_last_error() -> u32 {
CTYPES_LOCAL_LAST_ERROR.with(|e| e.get())
}
#[cfg(windows)]
pub fn set_last_error(value: u32) -> u32 {
CTYPES_LOCAL_LAST_ERROR.with(|e| {
let old = e.get();
e.set(value);
old
})
}
#[cfg(windows)]
pub fn with_swapped_last_error<F, R>(f: F) -> R
where
F: FnOnce() -> R,
{
let saved_last_error = crate::windows::get_last_error();
let saved_ctypes_last_error = CTYPES_LOCAL_LAST_ERROR.with(|e| e.get());
crate::windows::set_last_error(saved_ctypes_last_error);
let result = f();
let new_error = crate::windows::get_last_error();
CTYPES_LOCAL_LAST_ERROR.with(|e| e.set(new_error));
crate::windows::set_last_error(saved_last_error);
result
}
#[cfg(all(
any(target_arch = "x86_64", target_arch = "aarch64"),
not(target_os = "windows")
))]
const LONG_DOUBLE_SIZE: usize = core::mem::size_of::<u128>();
#[cfg(target_os = "windows")]
const LONG_DOUBLE_SIZE: usize = core::mem::size_of::<c_double>();
#[cfg(not(any(
all(
any(target_arch = "x86_64", target_arch = "aarch64"),
not(target_os = "windows")
),
target_os = "windows"
)))]
const LONG_DOUBLE_SIZE: usize = core::mem::size_of::<c_double>();
pub fn simple_type_size(ty: &str) -> Option<usize> {
match ty {
"c" | "b" => Some(core::mem::size_of::<c_schar>()),
"u" => Some(core::mem::size_of::<WChar>()),
"B" | "?" => Some(core::mem::size_of::<c_uchar>()),
"h" | "v" => Some(core::mem::size_of::<c_short>()),
"H" => Some(core::mem::size_of::<c_ushort>()),
"i" => Some(core::mem::size_of::<c_int>()),
"I" => Some(core::mem::size_of::<c_uint>()),
"l" => Some(core::mem::size_of::<c_long>()),
"L" => Some(core::mem::size_of::<c_ulong>()),
"q" => Some(core::mem::size_of::<c_longlong>()),
"Q" => Some(core::mem::size_of::<c_ulonglong>()),
"f" => Some(core::mem::size_of::<c_float>()),
"d" => Some(core::mem::size_of::<c_double>()),
"g" => Some(LONG_DOUBLE_SIZE),
"z" | "Z" | "P" | "X" | "O" => Some(core::mem::size_of::<usize>()),
"void" => Some(0),
_ => None,
}
}
pub fn simple_type_align(ty: &str) -> Option<usize> {
match ty {
"c" | "b" => Some(core::mem::align_of::<c_schar>()),
"u" => Some(core::mem::align_of::<WChar>()),
"B" | "?" => Some(core::mem::align_of::<c_uchar>()),
"h" | "v" => Some(core::mem::align_of::<c_short>()),
"H" => Some(core::mem::align_of::<c_ushort>()),
"i" => Some(core::mem::align_of::<c_int>()),
"I" => Some(core::mem::align_of::<c_uint>()),
"l" => Some(core::mem::align_of::<c_long>()),
"L" => Some(core::mem::align_of::<c_ulong>()),
"q" => Some(core::mem::align_of::<c_longlong>()),
"Q" => Some(core::mem::align_of::<c_ulonglong>()),
"f" => Some(core::mem::align_of::<c_float>()),
"d" => Some(core::mem::align_of::<c_double>()),
"g" => {
#[cfg(all(
any(target_arch = "x86_64", target_arch = "aarch64"),
not(target_os = "windows")
))]
{
Some(core::mem::align_of::<u128>())
}
#[cfg(not(all(
any(target_arch = "x86_64", target_arch = "aarch64"),
not(target_os = "windows")
)))]
{
Some(core::mem::align_of::<c_double>())
}
}
"z" | "Z" | "P" | "X" | "O" => Some(core::mem::align_of::<usize>()),
"void" => Some(0),
_ => None,
}
}
pub fn c_long_bytes_endian(value: i128, swapped: bool) -> Vec<u8> {
let value = value as c_long;
int_to_sized_bytes_endian(value as i64, core::mem::size_of::<c_long>(), swapped)
}
pub fn c_ulong_bytes_endian(value: i128, swapped: bool) -> Vec<u8> {
let value = value as c_ulong;
uint_to_sized_bytes_endian(value as u64, core::mem::size_of::<c_ulong>(), swapped)
}
pub fn simple_type_pep3118_code(code: char) -> char {
match code {
'i' if core::mem::size_of::<c_int>() == 2 => 'h',
'i' if core::mem::size_of::<c_int>() == 4 => 'i',
'i' if core::mem::size_of::<c_int>() == 8 => 'q',
'I' if core::mem::size_of::<c_int>() == 2 => 'H',
'I' if core::mem::size_of::<c_int>() == 4 => 'I',
'I' if core::mem::size_of::<c_int>() == 8 => 'Q',
'l' if core::mem::size_of::<c_long>() == 4 => 'l',
'l' if core::mem::size_of::<c_long>() == 8 => 'q',
'L' if core::mem::size_of::<c_long>() == 4 => 'L',
'L' if core::mem::size_of::<c_long>() == 8 => 'Q',
'?' if core::mem::size_of::<bool>() == 1 => '?',
'?' if core::mem::size_of::<bool>() == 2 => 'H',
'?' if core::mem::size_of::<bool>() == 4 => 'L',
'?' if core::mem::size_of::<bool>() == 8 => 'Q',
_ => code,
}
}
pub enum StringAtError {
NullPointer,
TooLong,
}
#[derive(Debug, Clone, Copy, PartialEq, Eq)]
pub enum RawMemoryViewError {
NullPointer,
NegativeSize,
}
#[derive(Debug, Clone, Copy)]
pub struct RawMemoryView {
ptr: usize,
size: usize,
readonly: bool,
}
impl RawMemoryView {
pub fn new(ptr: usize, size: isize, readonly: bool) -> Result<Self, RawMemoryViewError> {
if ptr == 0 {
return Err(RawMemoryViewError::NullPointer);
}
if size < 0 {
return Err(RawMemoryViewError::NegativeSize);
}
Ok(Self {
ptr,
size: size as usize,
readonly,
})
}
pub fn size(self) -> usize {
self.size
}
pub fn readonly(self) -> bool {
self.readonly
}
/// # Safety
///
/// The stored pointer must remain valid for `self.size` bytes.
pub unsafe fn bytes(self) -> &'static [u8] {
unsafe { borrow_memory(self.ptr as *const u8, self.size) }
}
/// # Safety
///
/// The stored pointer must remain valid and uniquely writable for
/// `self.size` bytes.
pub unsafe fn bytes_mut(self) -> &'static mut [u8] {
unsafe { borrow_memory_mut(self.ptr as *mut u8, self.size) }
}
}
// These match the current RustPython _ctypes surface exactly.
pub const RTLD_LOCAL: i32 = 0;
pub const RTLD_GLOBAL: i32 = 0;
pub const SIZEOF_TIME_T: usize = core::mem::size_of::<TimeT>();
#[cfg(all(unix, not(target_os = "wasi")))]
pub fn dlopen_mode(load_flags: Option<i32>) -> i32 {
load_flags.unwrap_or(libc::RTLD_NOW | libc::RTLD_LOCAL) | libc::RTLD_NOW
}
#[cfg(not(all(unix, not(target_os = "wasi"))))]
pub fn dlopen_mode(load_flags: Option<i32>) -> i32 {
load_flags.unwrap_or(0)
}
#[cfg(target_os = "macos")]
pub fn dyld_shared_cache_contains_path(path: &str) -> Result<bool, alloc::ffi::NulError> {
let c_path = alloc::ffi::CString::new(path)?;
unsafe extern "C" {
fn _dyld_shared_cache_contains_path(path: *const c_char) -> bool;
}
Ok(unsafe { _dyld_shared_cache_contains_path(c_path.as_ptr()) })
}
/// # Safety
///
/// `ptr` must be valid to read until the first NUL byte.
pub unsafe fn strlen(ptr: *const c_char) -> usize {
#[cfg(any(unix, windows, target_os = "wasi"))]
{
unsafe { libc::strlen(ptr) }
}
#[cfg(not(any(unix, windows, target_os = "wasi")))]
{
let mut len = 0;
while unsafe { *ptr.add(len) } != 0 {
len += 1;
}
len
}
}
/// # Safety
///
/// `ptr` must be valid to read until the first NUL wide character.
pub unsafe fn wcslen(ptr: *const WChar) -> usize {
let mut len = 0;
while unsafe { *ptr.add(len) } != 0 as WChar {
len += 1;
}
len
}
/// # Safety
///
/// `ptr` must be a valid NUL-terminated C string.
pub unsafe fn read_c_string_bytes(ptr: *const c_char) -> Vec<u8> {
unsafe { CStr::from_ptr(ptr) }.to_bytes().to_vec()
}
#[inline]
pub fn read_pointer_from_buffer(buffer: &[u8]) -> usize {
const PTR_SIZE: usize = core::mem::size_of::<usize>();
buffer
.first_chunk::<PTR_SIZE>()
.copied()
.map_or(0, usize::from_ne_bytes)
}
pub const WCHAR_SIZE: usize = core::mem::size_of::<WChar>();
#[inline]
pub fn wchar_from_bytes(bytes: &[u8]) -> Option<u32> {
if bytes.len() < WCHAR_SIZE {
return None;
}
Some(if WCHAR_SIZE == 2 {
u16::from_ne_bytes([bytes[0], bytes[1]]) as u32
} else {
u32::from_ne_bytes([bytes[0], bytes[1], bytes[2], bytes[3]])
})
}
#[inline]
pub fn wchar_to_bytes(ch: u32, buffer: &mut [u8]) {
if WCHAR_SIZE == 2 {
if buffer.len() >= 2 {
buffer[..2].copy_from_slice(&(ch as u16).to_ne_bytes());
}
} else if buffer.len() >= 4 {
buffer[..4].copy_from_slice(&ch.to_ne_bytes());
}
}
pub fn wstring_from_bytes(buffer: &[u8]) -> String {
let mut chars = Vec::new();
for chunk in buffer.chunks(WCHAR_SIZE) {
if chunk.len() < WCHAR_SIZE {
break;
}
let Some(code) = wchar_from_bytes(chunk) else {
break;
};
if code == 0 {
break;
}
if let Some(ch) = char::from_u32(code) {
chars.push(ch);
}
}
chars.into_iter().collect()
}
pub fn wchar_array_field_value(buffer: &[u8]) -> String {
let wchars: Vec<WChar> = buffer
.chunks(WCHAR_SIZE)
.filter_map(|chunk| wchar_from_bytes(chunk).filter(|&wchar| wchar != 0))
.map(|wchar| wchar as WChar)
.collect();
wide_chars_to_wtf8(&wchars).to_string()
}
pub fn write_wchar_array_value(buffer: &mut [u8], s: &Wtf8) -> Result<(), WCharArrayWriteError> {
let wchar_count = buffer.len() / WCHAR_SIZE;
let char_count = s.code_points().count();
if char_count > wchar_count {
return Err(WCharArrayWriteError::TooLong);
}
for (i, ch) in s.code_points().enumerate() {
let offset = i * WCHAR_SIZE;
wchar_to_bytes(ch.to_u32(), &mut buffer[offset..]);
}
let terminator_offset = char_count * WCHAR_SIZE;
if terminator_offset + WCHAR_SIZE <= buffer.len() {
wchar_to_bytes(0, &mut buffer[terminator_offset..]);
}
Ok(())
}
pub fn encode_wtf8_to_wchar_padded(s: &Wtf8, size: usize) -> Vec<u8> {
let mut wchar_bytes = Vec::with_capacity(size);
for cp in s.code_points().take(size / WCHAR_SIZE) {
let mut bytes = [0u8; 4];
wchar_to_bytes(cp.to_u32(), &mut bytes);
wchar_bytes.extend_from_slice(&bytes[..WCHAR_SIZE]);
}
while wchar_bytes.len() < size {
wchar_bytes.push(0);
}
wchar_bytes
}
pub fn wchar_null_terminated_bytes(s: &Wtf8) -> Vec<u8> {
let wchars: Vec<WChar> = s
.code_points()
.map(|cp| cp.to_u32() as WChar)
.chain(core::iter::once(0))
.collect();
vec_into_bytes(wchars)
}
pub fn vec_into_bytes<T>(vec: Vec<T>) -> Vec<u8> {
let len = vec.len() * core::mem::size_of::<T>();
let cap = vec.capacity() * core::mem::size_of::<T>();
let ptr = vec.as_ptr() as *mut u8;
core::mem::forget(vec);
unsafe { Vec::from_raw_parts(ptr, len, cap) }
}
pub enum IntegerValue {
Signed(i64),
Unsigned(u64),
}
pub enum AddressValue {
ByteString(u8),
Integer(IntegerValue),
Float(f64),
Pointer(usize),
Bytes(Vec<u8>),
}
pub enum AddressWriteValue<'a> {
Pointer(usize),
U8(u8),
I16(i16),
I32(i32),
I64(i64),
Float(f64),
Bytes(&'a [u8]),
}
pub enum ArrayElementWriteValue<'a> {
Byte(u8),
Wchar(u32),
Pointer { value: usize, size: usize },
Float { value: f64, size: usize },
Bytes { bytes: &'a [u8], size: usize },
}
pub enum WCharArrayWriteError {
TooLong,
}
pub enum SimpleStorageValue {
Byte(u8),
Wchar(u32),
Signed(i128),
Float(f64),
Bool(bool),
Pointer(usize),
ObjectId(usize),
Zero,
}
pub enum DecodedValue {
Bytes(Vec<u8>),
Signed(i64),
Unsigned(u64),
Float(f64),
Bool(bool),
Pointer(usize),
String(String),
None,
}
pub enum CallbackResultValue {
Signed(i64),
Unsigned(u64),
Float(f64),
Pointer(usize),
Bool(bool),
}
#[cfg(all(
any(
target_os = "linux",
target_os = "macos",
target_os = "windows",
target_os = "android"
),
not(any(target_env = "musl", target_env = "sgx"))
))]
pub enum FfiArgRef<'a> {
U8(&'a u8),
I8(&'a i8),
U16(&'a u16),
I16(&'a i16),
U32(&'a u32),
I32(&'a i32),
U64(&'a u64),
I64(&'a i64),
F32(&'a f32),
F64(&'a f64),
Pointer(&'a usize),
}
#[cfg(all(
any(
target_os = "linux",
target_os = "macos",
target_os = "windows",
target_os = "android"
),
not(any(target_env = "musl", target_env = "sgx"))
))]
#[derive(Debug, Clone, Copy)]
pub enum FfiValue {
U8(u8),
I8(i8),
U16(u16),
I16(i16),
U32(u32),
I32(i32),
U64(u64),
I64(i64),
F32(f32),
F64(f64),
Pointer(usize),
}
#[cfg(all(
any(
target_os = "linux",
target_os = "macos",
target_os = "windows",
target_os = "android"
),
not(any(target_env = "musl", target_env = "sgx"))
))]
pub enum CallResult {
Void,
Pointer(usize),
Value(low::ffi_arg),
}
#[cfg(all(
any(
target_os = "linux",
target_os = "macos",
target_os = "windows",
target_os = "android"
),
not(any(target_env = "musl", target_env = "sgx"))
))]
pub enum CdeclArgValue {
Pointer(isize),
Int(isize),
}
pub const POINTER_SIZE: usize = core::mem::size_of::<usize>();
pub const POINTER_FORMAT: &str = "X{}";
pub fn pointer_size() -> usize {
POINTER_SIZE
}
pub fn pointer_format() -> &'static str {
POINTER_FORMAT
}
pub fn has_pointer_width(buffer: &[u8]) -> bool {
buffer.len() >= POINTER_SIZE
}
pub fn pointer_bytes(value: usize) -> Vec<u8> {
pointer_to_sized_bytes(value, POINTER_SIZE)
}
pub fn null_pointer_bytes() -> Vec<u8> {
vec![0; POINTER_SIZE]
}
pub fn zeroed_bytes(size: usize) -> Vec<u8> {
vec![0; size]
}
pub fn copy_to_sized_bytes(src: &[u8], size: usize) -> Vec<u8> {
let mut result = zeroed_bytes(size);
let len = src.len().min(size);
result[..len].copy_from_slice(&src[..len]);
result
}
pub fn char_array_assignment_bytes(src: &[u8]) -> &[u8] {
if let Some(null_pos) = src.iter().position(|&b| b == 0) {
&src[..=null_pos]
} else {
src
}
}
pub fn char_array_field_value(buffer: &[u8]) -> &[u8] {
let end = buffer.iter().position(|&b| b == 0).unwrap_or(buffer.len());
&buffer[..end]
}
pub fn write_char_array_value(buffer: &mut [u8], src: &[u8]) {
buffer[..src.len()].copy_from_slice(src);
if src.len() < buffer.len() {
buffer[src.len()] = 0;
}
}
pub fn write_char_array_raw(buffer: &mut [u8], src: &[u8]) {
buffer[..src.len()].copy_from_slice(src);
}
pub fn write_prefix_limited(buffer: &mut [u8], src: &[u8], size: usize) {
let copy_size = size.min(buffer.len()).min(src.len());
if copy_size > 0 {
buffer[..copy_size].copy_from_slice(&src[..copy_size]);
}
}
pub fn pointer_to_sized_bytes_endian(value: usize, size: usize, swapped: bool) -> Vec<u8> {
let mut bytes = pointer_to_sized_bytes(value, size);
if swapped {
bytes.reverse();
}
bytes
}
pub fn write_pointer_to_buffer_at(buffer: &mut [u8], offset: usize, size: usize, value: usize) {
if offset + size <= buffer.len() {
let ptr_bytes = pointer_to_sized_bytes(value, size);
buffer[offset..offset + size].copy_from_slice(&ptr_bytes);
}
}
pub fn write_array_element(buffer: &mut [u8], offset: usize, value: ArrayElementWriteValue<'_>) {
match value {
ArrayElementWriteValue::Byte(value) => {
if offset < buffer.len() {
buffer[offset] = value;
}
}
ArrayElementWriteValue::Wchar(value) => {
if offset + WCHAR_SIZE <= buffer.len() {
wchar_to_bytes(value, &mut buffer[offset..]);
}
}
ArrayElementWriteValue::Pointer { value, size } => {
write_pointer_to_buffer_at(buffer, offset, size, value);
}
ArrayElementWriteValue::Float { value, size } => {
if offset + size <= buffer.len()
&& let Some(float_bytes) = float_to_sized_bytes(value, size)
{
buffer[offset..offset + size].copy_from_slice(&float_bytes);
}
}
ArrayElementWriteValue::Bytes { bytes, size } => {
let copy_len = bytes.len().min(size);
if offset + copy_len <= buffer.len() {
buffer[offset..offset + copy_len].copy_from_slice(&bytes[..copy_len]);
}
}
}
}
pub fn read_array_element(
buffer: &[u8],
offset: usize,
element_size: usize,
type_code: Option<&str>,
) -> DecodedValue {
let Some(rest) = buffer.get(offset..) else {
return DecodedValue::Signed(0);
};
match type_code {
Some("c") => DecodedValue::Bytes(vec![buffer.get(offset).copied().unwrap_or(0)]),
Some("u") => {
let value = wchar_from_bytes(rest)
.and_then(char::from_u32)
.map(|c| c.to_string())
.unwrap_or_default();
DecodedValue::String(value)
}
Some("z") => {
if offset + element_size > buffer.len() {
return DecodedValue::None;
}
let ptr_bytes = &buffer[offset..offset + element_size];
let ptr_val = read_pointer_from_buffer(ptr_bytes);
unsafe {
match read_c_string_from_address(ptr_val) {
Some(bytes) => DecodedValue::Bytes(bytes),
None => DecodedValue::None,
}
}
}
Some("Z") => {
if offset + element_size > buffer.len() {
return DecodedValue::None;
}
let ptr_bytes = &buffer[offset..offset + element_size];
let ptr_val = read_pointer_from_buffer(ptr_bytes);
unsafe {
match read_wide_string_from_address(ptr_val) {
Some(s) => DecodedValue::String(s.to_string()),
None => DecodedValue::None,
}
}
}
Some("f") => DecodedValue::Float(
rest.first_chunk::<4>()
.copied()
.map_or(0.0, f32::from_ne_bytes) as f64,
),
Some("d" | "g") => DecodedValue::Float(
rest.first_chunk::<8>()
.copied()
.map_or(0.0, f64::from_ne_bytes),
),
_ => {
if let Some(bytes) = rest.get(..element_size) {
let is_unsigned = matches!(type_code, Some("B" | "H" | "I" | "L" | "Q"));
match int_from_bytes(bytes, element_size, is_unsigned) {
IntegerValue::Signed(value) => DecodedValue::Signed(value),
IntegerValue::Unsigned(value) => DecodedValue::Unsigned(value),
}
} else {
DecodedValue::Signed(0)
}
}
}
}
pub fn int_from_bytes(bytes: &[u8], size: usize, unsigned: bool) -> IntegerValue {
match (size, unsigned) {
(1, false) => IntegerValue::Signed(bytes[0] as i8 as i64),
(1, true) => IntegerValue::Unsigned(bytes[0].into()),
(2, false) => IntegerValue::Signed(i16::from_ne_bytes([bytes[0], bytes[1]]).into()),
(2, true) => IntegerValue::Unsigned(u16::from_ne_bytes([bytes[0], bytes[1]]).into()),
(4, false) => IntegerValue::Signed(
i32::from_ne_bytes([bytes[0], bytes[1], bytes[2], bytes[3]]).into(),
),
(4, true) => IntegerValue::Unsigned(
u32::from_ne_bytes([bytes[0], bytes[1], bytes[2], bytes[3]]).into(),
),
(8, false) => IntegerValue::Signed(i64::from_ne_bytes([
bytes[0], bytes[1], bytes[2], bytes[3], bytes[4], bytes[5], bytes[6], bytes[7],
])),
(8, true) => IntegerValue::Unsigned(u64::from_ne_bytes([
bytes[0], bytes[1], bytes[2], bytes[3], bytes[4], bytes[5], bytes[6], bytes[7],
])),
_ => IntegerValue::Signed(0),
}
}
pub fn int_to_sized_bytes(value: i64, size: usize) -> Vec<u8> {
match size {
1 => (value as i8).to_ne_bytes().to_vec(),
2 => (value as i16).to_ne_bytes().to_vec(),
4 => (value as i32).to_ne_bytes().to_vec(),
8 => value.to_ne_bytes().to_vec(),
_ => vec![0u8; size],
}
}
pub fn uint_to_sized_bytes(value: u64, size: usize) -> Vec<u8> {
match size {
1 => (value as u8).to_ne_bytes().to_vec(),
2 => (value as u16).to_ne_bytes().to_vec(),
4 => (value as u32).to_ne_bytes().to_vec(),
8 => value.to_ne_bytes().to_vec(),
_ => vec![0u8; size],
}
}
pub fn int_to_sized_bytes_endian(value: i64, size: usize, swapped: bool) -> Vec<u8> {
if swapped {
#[cfg(target_endian = "little")]
{
match size {
1 => (value as i8).to_ne_bytes().to_vec(),
2 => (value as i16).to_be_bytes().to_vec(),
4 => (value as i32).to_be_bytes().to_vec(),
8 => value.to_be_bytes().to_vec(),
_ => vec![0u8; size],
}
}
#[cfg(target_endian = "big")]
{
match size {
1 => (value as i8).to_ne_bytes().to_vec(),
2 => (value as i16).to_le_bytes().to_vec(),
4 => (value as i32).to_le_bytes().to_vec(),
8 => value.to_le_bytes().to_vec(),
_ => vec![0u8; size],
}
}
} else {
int_to_sized_bytes(value, size)
}
}
pub fn uint_to_sized_bytes_endian(value: u64, size: usize, swapped: bool) -> Vec<u8> {
if swapped {
#[cfg(target_endian = "little")]
{
match size {
1 => (value as u8).to_ne_bytes().to_vec(),
2 => (value as u16).to_be_bytes().to_vec(),
4 => (value as u32).to_be_bytes().to_vec(),
8 => value.to_be_bytes().to_vec(),
_ => vec![0u8; size],
}
}
#[cfg(target_endian = "big")]
{
match size {
1 => (value as u8).to_ne_bytes().to_vec(),
2 => (value as u16).to_le_bytes().to_vec(),
4 => (value as u32).to_le_bytes().to_vec(),
8 => value.to_le_bytes().to_vec(),
_ => vec![0u8; size],
}
}
} else {
uint_to_sized_bytes(value, size)
}
}
pub fn float_to_sized_bytes(value: f64, size: usize) -> Option<Vec<u8>> {
match size {
4 => Some((value as f32).to_ne_bytes().to_vec()),
8 => Some(value.to_ne_bytes().to_vec()),
_ => None,
}
}
pub fn float_to_sized_bytes_endian(value: f64, size: usize, swapped: bool) -> Option<Vec<u8>> {
if swapped {
#[cfg(target_endian = "little")]
{
match size {
4 => Some((value as f32).to_be_bytes().to_vec()),
8 => Some(value.to_be_bytes().to_vec()),
_ => None,
}
}
#[cfg(target_endian = "big")]
{
match size {
4 => Some((value as f32).to_le_bytes().to_vec()),
8 => Some(value.to_le_bytes().to_vec()),
_ => None,
}
}
} else {
float_to_sized_bytes(value, size)
}
}
pub fn pointer_to_sized_bytes(value: usize, size: usize) -> Vec<u8> {
let mut result = vec![0u8; size];
let bytes = value.to_ne_bytes();
let len = core::cmp::min(bytes.len(), size);
result[..len].copy_from_slice(&bytes[..len]);
result
}
pub fn wchar_code_to_bytes_endian(ch: u32, swapped: bool) -> Vec<u8> {
let mut buffer = vec![0u8; WCHAR_SIZE];
wchar_to_bytes(ch, &mut buffer);