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Refactor

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This commit is contained in:
Sergey Pepyakin 2017-12-05 14:11:00 +01:00
parent 11e4cd6ba1
commit e41e0f98ef
1 changed files with 32 additions and 17 deletions
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49
src/validation/mod.rs
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@ -3,7 +3,7 @@
use std::fmt;
use std::iter::repeat;
use elements::{BlockType, External, FunctionType, GlobalEntry, GlobalType, Internal, MemoryType,
Module, Opcode, ResizableLimits, TableType, Type, ValueType};
Module, Opcode, ResizableLimits, TableType, Type, ValueType, InitExpr};
use common::stack;
use self::context::ModuleContext;
use self::func::Validator;
@ -249,19 +249,44 @@ impl TableType {
}
impl GlobalEntry {
fn validate(&self, globals_sofar: &[GlobalType]) -> Result<(), Error> {
let init = self.init_expr().code();
if init.len() != 2 {
fn validate(&self, globals: &[GlobalType]) -> Result<(), Error> {
let init = self.init_expr();
init.validate(globals)?;
let init_expr_ty = init.expr_const_type(globals)?;
if init_expr_ty != self.global_type().content_type() {
return Err(Error(format!(
"Trying to initialize variable of type {:?} with value of type {:?}",
self.global_type().content_type(),
init_expr_ty
)));
}
Ok(())
}
}
impl InitExpr {
fn validate(&self, globals: &[GlobalType]) -> Result<(), Error> {
let code = self.code();
if code.len() != 2 {
return Err(Error(
format!("Init expression should always be with length 2"),
));
}
let init_expr_ty: ValueType = match init[0] {
let _ = self.expr_const_type(globals)?;
if code[1] != Opcode::End {
return Err(Error(format!("Expression doesn't ends with `end` opcode")));
}
Ok(())
}
fn expr_const_type(&self, globals: &[GlobalType]) -> Result<ValueType, Error> {
let code = self.code();
let expr_ty: ValueType = match code[0] {
Opcode::I32Const(_) => ValueType::I32,
Opcode::I64Const(_) => ValueType::I64,
Opcode::F32Const(_) => ValueType::F32,
Opcode::F64Const(_) => ValueType::F64,
Opcode::GetGlobal(idx) => match globals_sofar.get(idx as usize) {
Opcode::GetGlobal(idx) => match globals.get(idx as usize) {
Some(target_global) => {
if target_global.is_mutable() {
return Err(Error(format!("Global {} is mutable", idx)));
@ -276,16 +301,6 @@ impl GlobalEntry {
},
_ => return Err(Error(format!("Non constant opcode in init expr"))),
};
if init_expr_ty != self.global_type().content_type() {
return Err(Error(format!(
"Trying to initialize variable of type {:?} with value of type {:?}",
self.global_type().content_type(),
init_expr_ty
)));
}
if init[1] != Opcode::End {
return Err(Error(format!("Expression doesn't ends with `end` opcode")));
}
Ok(())
Ok(expr_ty)
}
}