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|
mod blobs;
mod codes;
mod file;
mod strings;
mod tables;
mod traits;
mod r#type;
use super::*;
use blobs::Blobs;
pub use codes::*;
pub use r#type::*;
use std::collections::HashMap;
use strings::Strings;
pub use tables::*;
use traits::*;
pub struct Writer {
pub blobs: Blobs,
pub strings: Strings,
pub tables: Tables,
pub scopes: HashMap<String, u32>,
// TODO: is this faster than jsut using a single HashMap with a (String,String) key?
pub type_refs: HashMap<String, HashMap<String, u32>>,
pub type_specs: HashMap<Type, u32>,
}
impl Writer {
pub fn new(name: &str) -> Self {
let mut writer = Self {
blobs: Default::default(),
strings: Default::default(),
tables: Default::default(),
scopes: Default::default(),
type_refs: Default::default(),
type_specs: Default::default(),
};
writer.tables.TypeDef.push(TypeDef { TypeName: writer.strings.insert("<Module>"), ..Default::default() });
let name = name.rsplit_once(&['/', '\\']).map_or(name, |(_, name)| name);
writer.tables.Module.push(Module { Name: writer.strings.insert(name), Mvid: 1, ..Default::default() });
let name = name.rsplit_once('.').map_or(name, |(_, name)| name);
writer.tables.Assembly.push(Assembly {
Name: writer.strings.insert(name),
HashAlgId: 0x00008004,
MajorVersion: 0xFF,
MinorVersion: 0xFF,
BuildNumber: 0xFF,
RevisionNumber: 0xFF,
Flags: metadata::AssemblyFlags::WindowsRuntime.0,
..Default::default()
});
// Some winmd parsers will fail to read without an `mscorlib` reference. The `insert_module_types` function will typically include it
// automatically but a minimal `Module` tree may not add this dependency.
writer.insert_scope("System");
writer
}
pub fn into_stream(self) -> Vec<u8> {
file::write(self.tables.into_stream(), self.strings.into_stream(), self.blobs.into_stream())
}
pub fn insert_method_sig(&mut self, call_flags: metadata::MethodCallAttributes, return_type: &Type, param_types: &[Type]) -> u32 {
let mut blob = vec![call_flags.0];
usize_blob(param_types.len(), &mut blob);
self.type_blob(return_type, &mut blob);
for ty in param_types {
self.type_blob(ty, &mut blob);
}
self.blobs.insert(&blob)
}
pub fn insert_field_sig(&mut self, ty: &Type) -> u32 {
// TODO: can either cache in Writer, like we do for scopes and type_refs, or regenerate each time.
// Profile once we can stress test this with field/method signatures.
let mut blob = vec![0x6]; // FIELD
self.type_blob(ty, &mut blob);
self.blobs.insert(&blob)
}
fn insert_scope(&mut self, namespace: &str) -> u32 {
if let Some(scope) = self.scopes.get(namespace) {
*scope
} else if namespace == "System" {
let scope = ResolutionScope::AssemblyRef(self.tables.AssemblyRef.push2(AssemblyRef {
Name: self.strings.insert("mscorlib"),
MajorVersion: 4,
PublicKeyOrToken: self.blobs.insert(&[0xB7, 0x7A, 0x5C, 0x56, 0x19, 0x34, 0xE0, 0x89]), // TODO: comment on this
..Default::default()
}))
.encode();
self.scopes.insert(namespace.to_string(), scope);
scope
} else {
// TODO: may need to capture the original assembly info for external type_refs.
let scope = ResolutionScope::AssemblyRef(self.tables.AssemblyRef.push2(AssemblyRef {
Name: self.strings.insert(namespace),
MajorVersion: 0xFF,
MinorVersion: 0xFF,
BuildNumber: 0xFF,
RevisionNumber: 0xFF,
Flags: metadata::AssemblyFlags::WindowsRuntime.0,
..Default::default()
}))
.encode();
self.scopes.insert(namespace.to_string(), scope);
scope
}
}
pub fn insert_type_ref(&mut self, namespace: &str, name: &str) -> u32 {
if let Some(key) = self.type_refs.get(namespace) {
if let Some(reference) = key.get(name) {
return *reference;
}
}
let scope = self.insert_scope(namespace);
let reference = TypeDefOrRef::TypeRef(self.tables.TypeRef.push2(TypeRef { TypeName: self.strings.insert(name), TypeNamespace: self.strings.insert(namespace), ResolutionScope: scope })).encode();
self.type_refs.entry(namespace.to_string()).or_default().insert(name.to_string(), reference);
reference
}
pub fn insert_type_spec(&mut self, ty: Type) -> u32 {
if let Some(key) = self.type_specs.get(&ty) {
return *key;
}
let mut blob = vec![];
self.type_blob(&ty, &mut blob);
let signature = self.blobs.insert(&blob);
let reference = TypeDefOrRef::TypeSpec(self.tables.TypeSpec.push2(TypeSpec { Signature: signature })).encode();
self.type_specs.insert(ty, reference);
reference
}
fn type_blob(&mut self, ty: &Type, blob: &mut Vec<u8>) {
match ty {
Type::Void => blob.push(metadata::ELEMENT_TYPE_VOID),
Type::Bool => blob.push(metadata::ELEMENT_TYPE_BOOLEAN),
Type::Char => blob.push(metadata::ELEMENT_TYPE_CHAR),
Type::I8 => blob.push(metadata::ELEMENT_TYPE_I1),
Type::U8 => blob.push(metadata::ELEMENT_TYPE_U1),
Type::I16 => blob.push(metadata::ELEMENT_TYPE_I2),
Type::U16 => blob.push(metadata::ELEMENT_TYPE_U2),
Type::I32 => blob.push(metadata::ELEMENT_TYPE_I4),
Type::U32 => blob.push(metadata::ELEMENT_TYPE_U4),
Type::I64 => blob.push(metadata::ELEMENT_TYPE_I8),
Type::U64 => blob.push(metadata::ELEMENT_TYPE_U8),
Type::F32 => blob.push(metadata::ELEMENT_TYPE_R4),
Type::F64 => blob.push(metadata::ELEMENT_TYPE_R8),
Type::ISize => blob.push(metadata::ELEMENT_TYPE_I),
Type::USize => blob.push(metadata::ELEMENT_TYPE_U),
Type::String => blob.push(metadata::ELEMENT_TYPE_STRING),
Type::IInspectable => blob.push(metadata::ELEMENT_TYPE_OBJECT),
Type::GUID => {
let code = self.insert_type_ref("System", "Guid");
blob.push(metadata::ELEMENT_TYPE_VALUETYPE);
usize_blob(code as usize, blob);
}
Type::HRESULT => {
let code = self.insert_type_ref("Windows.Foundation", "HResult");
blob.push(metadata::ELEMENT_TYPE_VALUETYPE);
usize_blob(code as usize, blob);
}
Type::TypeRef(ty) => {
if !ty.generics.is_empty() {
blob.push(metadata::ELEMENT_TYPE_GENERICINST);
}
let code = self.insert_type_ref(&ty.namespace, &ty.name);
blob.push(metadata::ELEMENT_TYPE_VALUETYPE);
usize_blob(code as usize, blob);
if !ty.generics.is_empty() {
usize_blob(ty.generics.len(), blob);
for ty in &ty.generics {
self.type_blob(ty, blob);
}
}
}
Type::BSTR => {
let code = self.insert_type_ref("Windows.Win32.Foundation", "BSTR");
blob.push(metadata::ELEMENT_TYPE_VALUETYPE);
usize_blob(code as usize, blob);
}
Type::IUnknown => {
let code = self.insert_type_ref("Windows.Win32.Foundation", "IUnknown");
blob.push(metadata::ELEMENT_TYPE_VALUETYPE);
usize_blob(code as usize, blob);
}
Type::PCWSTR | Type::PWSTR => {
let code = self.insert_type_ref("Windows.Win32.Foundation", "PWSTR");
blob.push(metadata::ELEMENT_TYPE_VALUETYPE);
usize_blob(code as usize, blob);
}
Type::PCSTR | Type::PSTR => {
let code = self.insert_type_ref("Windows.Win32.Foundation", "PSTR");
blob.push(metadata::ELEMENT_TYPE_VALUETYPE);
usize_blob(code as usize, blob);
}
Type::ConstRef(ty) => {
usize_blob(metadata::ELEMENT_TYPE_CMOD_OPT as usize, blob);
usize_blob(self.insert_type_ref("System.Runtime.CompilerServices", "IsConst") as usize, blob);
usize_blob(metadata::ELEMENT_TYPE_BYREF as usize, blob);
self.type_blob(ty, blob);
}
Type::WinrtArrayRef(ty) => {
usize_blob(metadata::ELEMENT_TYPE_BYREF as usize, blob);
usize_blob(metadata::ELEMENT_TYPE_SZARRAY as usize, blob);
self.type_blob(ty, blob);
}
Type::WinrtArray(ty) => {
usize_blob(metadata::ELEMENT_TYPE_SZARRAY as usize, blob);
self.type_blob(ty, blob);
}
Type::Win32Array(ty, bounds) => {
usize_blob(metadata::ELEMENT_TYPE_ARRAY as usize, blob);
self.type_blob(ty, blob);
usize_blob(1, blob); // rank
usize_blob(1, blob); // count
usize_blob(*bounds, blob);
}
Type::Type => {
let code = self.insert_type_ref("System", "Type");
blob.push(metadata::ELEMENT_TYPE_CLASS);
usize_blob(code as usize, blob);
}
Type::MutPtr(ty, pointers) | Type::ConstPtr(ty, pointers) => {
for _ in 0..*pointers {
usize_blob(metadata::ELEMENT_TYPE_PTR as usize, blob);
}
self.type_blob(ty, blob);
}
Type::GenericParam(index) => {
blob.push(metadata::ELEMENT_TYPE_VAR);
usize_blob(*index as usize, blob);
}
}
}
}
fn round(size: usize, round: usize) -> usize {
let round = round - 1;
(size + round) & !round
}
fn usize_blob(value: usize, blob: &mut Vec<u8>) {
// See II.23.2 in ECMA-335
assert!(value < 0x20000000);
if value < 0x80 {
blob.push(value as u8);
} else if value < 0x4000 {
blob.push((0x80 | (value & 0x3F00) >> 8) as u8);
blob.push((value & 0xFF) as u8);
} else {
blob.push((0xC0 | (value & 0x1F000000) >> 24) as u8);
blob.push(((value & 0xFF0000) >> 16) as u8);
blob.push(((value & 0xFF00) >> 8) as u8);
blob.push((value & 0xFF) as u8);
}
}
// #[cfg(test)]
// mod tests {
// use super::*;
// #[test]
// fn test_usize_blob() {
// let mut blob = vec![];
// usize_blob(0, &mut blob);
// usize_blob(1, &mut blob);
// usize_blob(2, &mut blob);
// usize_blob(0x80 - 2, &mut blob);
// usize_blob(0x80 - 1, &mut blob);
// usize_blob(0x80, &mut blob);
// usize_blob(0x80 + 1, &mut blob);
// usize_blob(0x80 + 2, &mut blob);
// usize_blob(0x4000 - 2, &mut blob);
// usize_blob(0x4000 - 1, &mut blob);
// usize_blob(0x4000, &mut blob);
// usize_blob(0x4000 + 1, &mut blob);
// usize_blob(0x4000 + 2, &mut blob);
// usize_blob(0x20000000 - 3, &mut blob);
// usize_blob(0x20000000 - 2, &mut blob);
// usize_blob(0x20000000 - 1, &mut blob);
// let mut blob = metadata::Blob::new(0, &blob);
// assert_eq!(blob.read_usize(), 0);
// assert_eq!(blob.read_usize(), 1);
// assert_eq!(blob.read_usize(), 2);
// assert_eq!(blob.read_usize(), 0x80 - 2);
// assert_eq!(blob.read_usize(), 0x80 - 1);
// assert_eq!(blob.read_usize(), 0x80);
// assert_eq!(blob.read_usize(), 0x80 + 1);
// assert_eq!(blob.read_usize(), 0x80 + 2);
// assert_eq!(blob.read_usize(), 0x4000 - 2);
// assert_eq!(blob.read_usize(), 0x4000 - 1);
// assert_eq!(blob.read_usize(), 0x4000);
// assert_eq!(blob.read_usize(), 0x4000 + 1);
// assert_eq!(blob.read_usize(), 0x4000 + 2);
// assert_eq!(blob.read_usize(), 0x20000000 - 3);
// assert_eq!(blob.read_usize(), 0x20000000 - 2);
// assert_eq!(blob.read_usize(), 0x20000000 - 1);
// assert_eq!(blob.slice.len(), 0);
// }
// }
|
