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use crate::message::MessageHeaderField;
use crate::value::{Array, ObjectPath, Struct, Type, TypeError};
use std::convert::TryFrom;
#[cfg(target_family = "unix")]
use std::os::unix::io::RawFd;
#[derive(Debug, Clone, PartialOrd, PartialEq)]
pub enum Value {
Byte(u8),
Boolean(bool),
Int16(i16),
Uint16(u16),
Int32(i32),
Uint32(u32),
Int64(i64),
Uint64(u64),
Double(f64),
String(String),
ObjectPath(ObjectPath),
Signature(Vec<Type>),
Array(Array),
Struct(Struct),
DictEntry(Box<(Value, Value)>),
Variant(Box<Value>),
#[cfg(target_family = "unix")]
UnixFD(RawFd),
}
impl Value {
pub(crate) fn to_signature_string(
&self,
signature_string: &mut String,
array_depth: u8,
struct_depth: u8,
dict_depth: u8,
) -> Result<(), TypeError> {
Type::check_depth(array_depth, struct_depth, dict_depth)?;
match self {
Value::Byte(_) => signature_string.push('y'),
Value::Boolean(_) => signature_string.push('b'),
Value::Int16(_) => signature_string.push('n'),
Value::Uint16(_) => signature_string.push('q'),
Value::Int32(_) => signature_string.push('i'),
Value::Uint32(_) => signature_string.push('u'),
Value::Int64(_) => signature_string.push('x'),
Value::Uint64(_) => signature_string.push('t'),
Value::Double(_) => signature_string.push('d'),
Value::String(_) => signature_string.push('s'),
Value::ObjectPath(_) => signature_string.push('o'),
Value::Signature(_) => signature_string.push('g'),
Value::Array(array) => {
signature_string.push('a');
array.get_type().try_to_string(
signature_string,
array_depth + 1,
struct_depth,
dict_depth,
)?;
}
Value::Struct(struct_) => {
signature_string.push('(');
for v in struct_.as_ref() {
v.to_signature_string(
signature_string,
array_depth,
struct_depth + 1,
dict_depth,
)?;
}
signature_string.push(')');
}
Value::DictEntry(b) => {
signature_string.push('{');
let (key, value) = &**b;
key.to_signature_string(
signature_string,
array_depth,
struct_depth,
dict_depth + 1,
)?;
value.to_signature_string(
signature_string,
array_depth,
struct_depth,
dict_depth + 1,
)?;
signature_string.push('}');
}
Value::Variant(_) => signature_string.push('v'),
#[cfg(target_family = "unix")]
Value::UnixFD(_) => signature_string.push('h'),
}
Type::check_len(signature_string)?;
Ok(())
}
fn from_value_to_type(
&self,
array_depth: u8,
struct_depth: u8,
dict_depth: u8,
) -> Result<Type, TypeError> {
Type::check_depth(array_depth, struct_depth, dict_depth)?;
match self {
Value::Byte(_) => Ok(Type::Byte),
Value::Boolean(_) => Ok(Type::Boolean),
Value::Int16(_) => Ok(Type::Int16),
Value::Uint16(_) => Ok(Type::Uint16),
Value::Int32(_) => Ok(Type::Int32),
Value::Uint32(_) => Ok(Type::Uint32),
Value::Int64(_) => Ok(Type::Int64),
Value::Uint64(_) => Ok(Type::Uint64),
#[cfg(target_family = "unix")]
Value::UnixFD(_) => Ok(Type::UnixFD),
Value::Double(_) => Ok(Type::Double),
Value::String(_) => Ok(Type::String),
Value::ObjectPath(_) => Ok(Type::ObjectPath),
Value::Signature(_) => Ok(Type::Signature),
Value::Array(array) => {
let signature = Box::new(array.get_type().clone());
Ok(Type::Array(signature))
}
Value::Struct(struct_) => {
let mut signatures = Vec::new();
for value in struct_.as_ref() {
let signature =
value.from_value_to_type(array_depth, struct_depth + 1, dict_depth)?;
signatures.push(signature);
}
Ok(Type::Struct(signatures))
}
Value::DictEntry(b) => {
let key_signature =
b.0.from_value_to_type(array_depth, struct_depth, dict_depth + 1)?;
let value_signature =
b.1.from_value_to_type(array_depth, struct_depth, dict_depth + 1)?;
let signature = Box::new((key_signature, value_signature));
Ok(Type::DictEntry(signature))
}
Value::Variant(_) => Ok(Type::Variant),
}
}
pub fn get_type(&self) -> Result<Type, TypeError> {
self.from_value_to_type(0, 0, 0)
}
}
impl From<MessageHeaderField> for Value {
fn from(header: MessageHeaderField) -> Self {
let (b, v) = match header {
MessageHeaderField::Path(s) => (Value::Byte(1), Value::ObjectPath(s)),
MessageHeaderField::Interface(s) => (Value::Byte(2), Value::String(s.into())),
MessageHeaderField::Member(s) => (Value::Byte(3), Value::String(s.into())),
MessageHeaderField::ErrorName(s) => (Value::Byte(4), Value::String(s.into())),
MessageHeaderField::ReplySerial(u) => (Value::Byte(5), Value::Uint32(u)),
MessageHeaderField::Destination(s) => (Value::Byte(6), Value::String(s.into())),
MessageHeaderField::Sender(s) => (Value::Byte(7), Value::String(s.into())),
MessageHeaderField::Signature(s) => (Value::Byte(8), Value::Signature(s)),
#[cfg(target_family = "unix")]
MessageHeaderField::UnixFDs(u) => (Value::Byte(9), Value::Uint32(u)),
};
let struct_ = Struct::try_from(vec![b, Value::Variant(Box::new(v))]).unwrap();
Value::Struct(struct_)
}
}