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//! Define [`PropValue`] and [`PropValueData`].
use crate::{sys, PropTag};
use core::{ffi, mem, slice};
use windows::Win32::{
Foundation::{E_INVALIDARG, E_POINTER, FILETIME},
System::Com::CY,
};
use windows_core::*;
/// Wrapper for a [`sys::SPropValue`] structure which allows pattern matching on [`PropValueData`].
pub struct PropValue<'a> {
pub tag: PropTag,
pub value: PropValueData<'a>,
}
/// Enum with values from the original [`sys::SPropValue::Value`] union.
pub enum PropValueData<'a> {
/// [`sys::PT_NULL`]
Null,
/// [`sys::PT_I2`] or [`sys::PT_SHORT`]
Short(i16),
/// [`sys::PT_I4`] or [`sys::PT_LONG`]
Long(i32),
/// [`sys::PT_PTR`] or [`sys::PT_FILE_HANDLE`]
Pointer(*mut ffi::c_void),
/// [`sys::PT_R4`] or [`sys::PT_FLOAT`]
Float(f32),
/// [`sys::PT_R8`] or [`sys::PT_DOUBLE`]
Double(f64),
/// [`sys::PT_BOOLEAN`]
Boolean(u16),
/// [`sys::PT_CURRENCY`]
Currency(i64),
/// [`sys::PT_APPTIME`]
AppTime(f64),
/// [`sys::PT_SYSTIME`]
FileTime(FILETIME),
/// [`sys::PT_STRING8`]
AnsiString(PCSTR),
/// [`sys::PT_BINARY`]
Binary(&'a [u8]),
/// [`sys::PT_UNICODE`]
Unicode(PCWSTR),
/// [`sys::PT_CLSID`]
Guid(&'a GUID),
/// [`sys::PT_I8`] or [`sys::PT_LONGLONG`]
LargeInteger(i64),
/// [`sys::PT_MV_SHORT`]
ShortArray(&'a [i16]),
/// [`sys::PT_MV_LONG`]
LongArray(&'a [i32]),
/// [`sys::PT_MV_FLOAT`]
FloatArray(&'a [f32]),
/// [`sys::PT_MV_DOUBLE`]
DoubleArray(&'a [f64]),
/// [`sys::PT_MV_CURRENCY`]
CurrencyArray(&'a [CY]),
/// [`sys::PT_MV_APPTIME`]
AppTimeArray(&'a [f64]),
/// [`sys::PT_MV_SYSTIME`]
FileTimeArray(&'a [FILETIME]),
/// [`sys::PT_MV_BINARY`]
BinaryArray(&'a [sys::SBinary]),
/// [`sys::PT_MV_STRING8`]
AnsiStringArray(&'a [PCSTR]),
/// [`sys::PT_MV_UNICODE`]
UnicodeArray(&'a [PCWSTR]),
/// [`sys::PT_MV_CLSID`]
GuidArray(&'a [GUID]),
/// [`sys::PT_MV_LONGLONG`]
LargeIntegerArray(&'a [i64]),
/// [`sys::PT_ERROR`]
Error(HRESULT),
/// [`sys::PT_OBJECT`]
Object(i32),
}
impl<'a> From<&'a sys::SPropValue> for PropValue<'a> {
/// Convert a [`sys::SPropValue`] reference into a friendlier [`PropValue`] type, which often
/// supports safe access to the [`sys::SPropValue::Value`] union.
fn from(value: &sys::SPropValue) -> Self {
let tag = PropTag(value.ulPropTag);
let prop_type = tag.prop_type().remove_flags(sys::MV_INSTANCE).into();
let data = unsafe {
match prop_type {
sys::PT_NULL => PropValueData::Null,
sys::PT_SHORT => PropValueData::Short(value.Value.i),
sys::PT_LONG => PropValueData::Long(value.Value.l),
sys::PT_PTR => PropValueData::Pointer(value.Value.lpv),
sys::PT_FLOAT => PropValueData::Float(value.Value.flt),
sys::PT_DOUBLE => PropValueData::Double(value.Value.dbl),
sys::PT_BOOLEAN => PropValueData::Boolean(value.Value.b),
sys::PT_CURRENCY => PropValueData::Currency(value.Value.cur.int64),
sys::PT_APPTIME => PropValueData::AppTime(value.Value.at),
sys::PT_SYSTIME => PropValueData::FileTime(value.Value.ft),
sys::PT_STRING8 => {
if value.Value.lpszA.is_null() {
PropValueData::Error(E_POINTER)
} else {
PropValueData::AnsiString(PCSTR::from_raw(value.Value.lpszA.as_ptr()))
}
}
sys::PT_BINARY => {
if value.Value.bin.lpb.is_null() {
PropValueData::Error(E_POINTER)
} else {
PropValueData::Binary(slice::from_raw_parts(
value.Value.bin.lpb,
value.Value.bin.cb as usize,
))
}
}
sys::PT_UNICODE => {
if value.Value.lpszW.is_null() {
PropValueData::Error(E_POINTER)
} else {
PropValueData::Unicode(PCWSTR::from_raw(value.Value.lpszW.as_ptr()))
}
}
sys::PT_CLSID => value
.Value
.lpguid
.as_ref()
.map(PropValueData::Guid)
.unwrap_or(PropValueData::Error(E_POINTER)),
sys::PT_LONGLONG => PropValueData::LargeInteger(value.Value.li),
sys::PT_MV_SHORT => {
if value.Value.MVi.lpi.is_null() {
PropValueData::Error(E_POINTER)
} else {
PropValueData::ShortArray(slice::from_raw_parts(
value.Value.MVi.lpi,
value.Value.MVi.cValues as usize,
))
}
}
sys::PT_MV_LONG => {
if value.Value.MVl.lpl.is_null() {
PropValueData::Error(E_POINTER)
} else {
PropValueData::LongArray(slice::from_raw_parts(
value.Value.MVl.lpl,
value.Value.MVl.cValues as usize,
))
}
}
sys::PT_MV_FLOAT => {
if value.Value.MVflt.lpflt.is_null() {
PropValueData::Error(E_POINTER)
} else {
PropValueData::FloatArray(slice::from_raw_parts(
value.Value.MVflt.lpflt,
value.Value.MVflt.cValues as usize,
))
}
}
sys::PT_MV_DOUBLE => {
if value.Value.MVdbl.lpdbl.is_null() {
PropValueData::Error(E_POINTER)
} else {
PropValueData::DoubleArray(slice::from_raw_parts(
value.Value.MVdbl.lpdbl,
value.Value.MVdbl.cValues as usize,
))
}
}
sys::PT_MV_CURRENCY => {
if value.Value.MVcur.lpcur.is_null() {
PropValueData::Error(E_POINTER)
} else {
PropValueData::CurrencyArray(slice::from_raw_parts(
value.Value.MVcur.lpcur,
value.Value.MVcur.cValues as usize,
))
}
}
sys::PT_MV_APPTIME => {
if value.Value.MVat.lpat.is_null() {
PropValueData::Error(E_POINTER)
} else {
PropValueData::AppTimeArray(slice::from_raw_parts(
value.Value.MVat.lpat,
value.Value.MVat.cValues as usize,
))
}
}
sys::PT_MV_SYSTIME => {
if value.Value.MVft.lpft.is_null() {
PropValueData::Error(E_POINTER)
} else {
PropValueData::FileTimeArray(slice::from_raw_parts(
value.Value.MVft.lpft,
value.Value.MVft.cValues as usize,
))
}
}
sys::PT_MV_BINARY => {
if value.Value.MVbin.lpbin.is_null() {
PropValueData::Error(E_POINTER)
} else {
PropValueData::BinaryArray(slice::from_raw_parts(
value.Value.MVbin.lpbin,
value.Value.MVbin.cValues as usize,
))
}
}
sys::PT_MV_STRING8 => {
if value.Value.MVszA.lppszA.is_null() {
PropValueData::Error(E_POINTER)
} else {
PropValueData::AnsiStringArray(slice::from_raw_parts(
mem::transmute(value.Value.MVszA.lppszA),
value.Value.MVszA.cValues as usize,
))
}
}
sys::PT_MV_UNICODE => {
if value.Value.MVszW.lppszW.is_null() {
PropValueData::Error(E_POINTER)
} else {
PropValueData::UnicodeArray(slice::from_raw_parts(
mem::transmute(value.Value.MVszW.lppszW),
value.Value.MVszW.cValues as usize,
))
}
}
sys::PT_MV_CLSID => {
if value.Value.MVguid.lpguid.is_null() {
PropValueData::Error(E_POINTER)
} else {
PropValueData::GuidArray(slice::from_raw_parts(
value.Value.MVguid.lpguid,
value.Value.MVguid.cValues as usize,
))
}
}
sys::PT_MV_LONGLONG => {
if value.Value.MVli.lpli.is_null() {
PropValueData::Error(E_POINTER)
} else {
PropValueData::LargeIntegerArray(slice::from_raw_parts(
value.Value.MVli.lpli,
value.Value.MVli.cValues as usize,
))
}
}
sys::PT_ERROR => PropValueData::Error(HRESULT(value.Value.err)),
sys::PT_OBJECT => PropValueData::Object(value.Value.x),
_ => PropValueData::Error(E_INVALIDARG),
}
};
PropValue { tag, value: data }
}
}