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use alloc::{format, vec::Vec};
use ellie_core::defs::PlatformArchitecture;
use crate::{
heap_memory::HeapMemory,
instruction_utils::LDB,
raw_type::StaticRawType,
stack::Stack,
stack_memory::StackMemory,
utils::{AddressingValues, ThreadPanicReason},
};
use super::{ExecuterPanic, ExecuterResult, StaticProgram};
impl super::InstructionExecuter for LDB {
fn execute(
&self,
heap_memory: &mut HeapMemory,
program: StaticProgram,
current_stack: &mut Stack,
stack_memory: &mut StackMemory,
addressing_value: &AddressingValues,
arch: PlatformArchitecture,
) -> Result<ExecuterResult, ExecuterPanic> {
match &addressing_value {
AddressingValues::Immediate(raw_type) => {
current_stack.registers.B = if raw_type.type_id.is_stack_storable() {
*raw_type
} else {
return Err(ExecuterPanic {
reason: ThreadPanicReason::ImmediateUseViolation(raw_type.type_id.id),
code_location: format!("{}:{}", file!(), line!()),
});
}
}
AddressingValues::Absolute(e) => {
current_stack.registers.B = match stack_memory
.get(&(current_stack.calculate_frame_pos(*e)))
{
Some(raw_type) => {
if raw_type.type_id.is_void() {
return Err(ExecuterPanic {
reason: ThreadPanicReason::NullReference(
current_stack.calculate_frame_pos(*e),
),
code_location: format!("{}:{}", file!(), line!()),
});
} else if raw_type.type_id.is_stack_storable() {
raw_type
} else {
StaticRawType::from_heap_reference(
current_stack.calculate_frame_pos(*e),
)
}
}
None => {
return Err(ExecuterPanic {
reason: ThreadPanicReason::MemoryAccessViolation(*e, current_stack.pos),
code_location: format!("{}:{}", file!(), line!()),
});
}
};
}
AddressingValues::AbsoluteIndex(pointer, index) => {
let index = match stack_memory.get(¤t_stack.calculate_frame_pos(*index)) {
Some(stack_data) => {
if stack_data.type_id.is_int() {
let data = stack_data.to_int();
if data < 0 {
return Err(ExecuterPanic {
reason: ThreadPanicReason::CannotIndexWithNegative(data),
code_location: format!("{}:{}", file!(), line!()),
});
} else {
data as usize
}
} else {
return Err(ExecuterPanic {
reason: ThreadPanicReason::UnexpectedType(stack_data.type_id.id),
code_location: format!("{}:{}", file!(), line!()),
});
}
}
None => {
return Err(ExecuterPanic {
reason: ThreadPanicReason::NullReference(*index),
code_location: format!("{}:{}", file!(), line!()),
});
}
};
match stack_memory.get(¤t_stack.calculate_frame_pos(*pointer)) {
Some(stack_data) => {
if stack_data.type_id.is_heap_reference() {
match heap_memory.get(&(stack_data.to_uint())) {
Some(heap_data) => {
if heap_data.type_id.is_array() {
let array_entry_size = usize::from_le_bytes(
heap_data.data[..arch.usize_len() as usize]
.try_into()
.unwrap(),
);
let array_data =
&heap_data.data[arch.usize_len() as usize..];
let array_entries =
array_data.chunks(array_entry_size).collect::<Vec<_>>();
if index >= array_entries.len() {
return Err(ExecuterPanic {
reason: ThreadPanicReason::IndexOutOfBounds(
index,
array_entries.len(),
),
code_location: format!("{}:{}", file!(), line!()),
});
} else {
let array_entry = array_entries[index];
current_stack.registers.B =
StaticRawType::from_bytes(array_entry);
return Ok(ExecuterResult::Continue);
}
} else {
return Err(ExecuterPanic {
reason: ThreadPanicReason::UnexpectedType(
heap_data.type_id.id,
),
code_location: format!("{}:{}", file!(), line!()),
});
}
}
None => {
return Err(ExecuterPanic {
reason: ThreadPanicReason::NullReference(
stack_data.to_uint(),
),
code_location: format!("{}:{}", file!(), line!()),
});
}
}
} else if stack_data.type_id.is_static_array() {
let array_location = stack_data.to_uint();
let array_size = match stack_memory.get(&(array_location + 1)) {
Some(e) => e.to_uint(),
None => {
return Err(ExecuterPanic {
reason: ThreadPanicReason::NullReference(array_location),
code_location: format!("{}:{}", file!(), line!()),
});
}
};
if index >= array_size {
return Err(ExecuterPanic {
reason: ThreadPanicReason::IndexOutOfBounds(index, array_size),
code_location: format!("{}:{}", file!(), line!()),
});
} else {
let entry = array_location + index;
current_stack.registers.B = match stack_memory.get(&(entry + 2)) {
Some(e) => e,
None => {
return Err(ExecuterPanic {
reason: ThreadPanicReason::NullReference(entry),
code_location: format!("{}:{}", file!(), line!()),
});
}
};
return Ok(ExecuterResult::Continue);
}
} else {
return Err(ExecuterPanic {
reason: ThreadPanicReason::UnexpectedType(stack_data.type_id.id),
code_location: format!("{}:{}", file!(), line!()),
});
}
}
None => {
return Err(ExecuterPanic {
reason: ThreadPanicReason::NullReference(*pointer),
code_location: format!("{}:{}", file!(), line!()),
});
}
}
}
AddressingValues::AbsoluteProperty(pointer, index) => match stack_memory
.get(&(current_stack.calculate_frame_pos(*pointer)))
{
Some(static_raw_type) => {
if static_raw_type.type_id.is_class()
|| static_raw_type.type_id.is_heap_reference()
{
match heap_memory.get(&static_raw_type.to_uint()) {
Some(raw_type) => {
if raw_type.type_id.is_array() {
// Increase size of array
let array_size = raw_type.type_id.size;
if *index >= array_size {
return Err(ExecuterPanic {
reason: ThreadPanicReason::IndexOutOfBounds(
*index, array_size,
),
code_location: format!("{}:{}", file!(), line!()),
});
} else {
let platform_size = arch.usize_len() as usize;
let array_entry_len = {
if raw_type.data.len() < (platform_size + 1) {
return Err(ExecuterPanic {
reason: ThreadPanicReason::ArraySizeCorruption,
code_location: format!(
"{}:{}",
file!(),
line!()
),
});
} else {
usize::from_le_bytes(
raw_type.data[0..platform_size]
.try_into()
.unwrap(),
)
}
};
if array_entry_len == 0 {
return Err(ExecuterPanic {
reason: ThreadPanicReason::ArraySizeCorruption,
code_location: format!("{}:{}", file!(), line!()),
});
}
let array_size = if (raw_type.data.len() - platform_size)
== 0
{
0
} else {
(raw_type.data.len() - platform_size) / array_entry_len
};
if *index >= array_size {
return Err(ExecuterPanic {
reason: ThreadPanicReason::IndexOutOfBounds(
*index, array_size,
),
code_location: format!("{}:{}", file!(), line!()),
});
} else {
let absolute_position_start = (arch.usize_len()
as usize)
+ (array_entry_len * index);
let absolute_position_end =
absolute_position_start + array_entry_len;
let array_entry = &raw_type.data
[absolute_position_start..absolute_position_end];
current_stack.registers.B =
StaticRawType::from_bytes(array_entry);
}
}
} else if raw_type.type_id.is_core_type() {
current_stack.registers.B = StaticRawType::from_heap_reference(
static_raw_type.to_uint(),
)
} else {
return Err(ExecuterPanic {
reason: ThreadPanicReason::UnexpectedType(
static_raw_type.type_id.id,
),
code_location: format!("{}:{}", file!(), line!()),
});
}
}
None => {
return Err(ExecuterPanic {
reason: ThreadPanicReason::NullReference(
static_raw_type.to_uint(),
),
code_location: format!("{}:{}", file!(), line!()),
});
}
}
} else if static_raw_type.type_id.is_core_type() {
current_stack.registers.B = static_raw_type;
} else if static_raw_type.type_id.is_static_array() {
let array_location = static_raw_type.to_uint();
let array_size = match stack_memory.get(&(array_location + 1)) {
Some(e) => e.to_uint(),
None => {
return Err(ExecuterPanic {
reason: ThreadPanicReason::NullReference(array_location),
code_location: format!("{}:{}", file!(), line!()),
});
}
};
if *index >= array_size {
return Err(ExecuterPanic {
reason: ThreadPanicReason::IndexOutOfBounds(*index, array_size),
code_location: format!("{}:{}", file!(), line!()),
});
} else {
let entry = array_location + index;
current_stack.registers.B = match stack_memory.get(&(entry + 2)) {
Some(e) => e,
None => {
return Err(ExecuterPanic {
reason: ThreadPanicReason::NullReference(entry),
code_location: format!("{}:{}", file!(), line!()),
});
}
};
}
} else {
return Err(ExecuterPanic {
reason: ThreadPanicReason::UnexpectedType(static_raw_type.type_id.id),
code_location: format!("{}:{}", file!(), line!()),
});
}
}
None => {
return Err(ExecuterPanic {
reason: ThreadPanicReason::IllegalAddressingValue,
code_location: format!("{}:{}", file!(), line!()),
})
}
},
AddressingValues::AbsoluteStatic(e) => {
let instruction = program[*e];
current_stack.registers.B = match instruction.addressing_value {
AddressingValues::Immediate(static_raw_type) => {
if static_raw_type.type_id.is_stack_storable() {
static_raw_type
} else {
return Err(ExecuterPanic {
reason: ThreadPanicReason::ImmediateUseViolation(
static_raw_type.type_id.id,
),
code_location: format!("{}:{}", file!(), line!()),
});
}
}
_ => {
return Err(ExecuterPanic {
reason: ThreadPanicReason::IllegalAddressingValue,
code_location: format!("{}:{}", file!(), line!()),
})
}
}
}
AddressingValues::IndirectA => {
current_stack.registers.B = current_stack.registers.A;
}
AddressingValues::IndirectC => {
current_stack.registers.B = current_stack.registers.C;
}
AddressingValues::IndirectX => {
current_stack.registers.B = current_stack.registers.X;
}
AddressingValues::IndirectY => {
current_stack.registers.B = current_stack.registers.Y;
}
_ => {
return Err(ExecuterPanic {
reason: ThreadPanicReason::IllegalAddressingValue,
code_location: format!("{}:{}", file!(), line!()),
})
}
}
Ok(ExecuterResult::Continue)
}
}