5 files changed, 576 insertions, 3 deletions

diff --git a/src/structs/error.rs b/src/structs/error.rs
new file mode 100644
index 0000000..b9d765d
--- /dev/null
+++ b/src/structs/error.rs
@@ -0,0 +1,29 @@
+use crate::{ArchiveError, ArchiveResult};
+use std::error::Error;
+use std::fmt::Display;
+
+pub type StructResult<T> = ArchiveResult<T, StructError>;
+
+#[derive(Debug)]
+pub enum StructError {
+    IncorrectEnumVariant,
+}
+
+impl From<StructError> for ArchiveError<StructError> {
+    fn from(value: StructError) -> Self {
+        Self::Archivator {
+            module: "Struct serializer".to_string(),
+            error: value,
+        }
+    }
+}
+
+impl Display for StructError {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        match self {
+            StructError::IncorrectEnumVariant => write!(f, "Can't cast enum variant type"),
+        }
+    }
+}
+
+impl Error for StructError {}
diff --git a/src/structs/mod.rs b/src/structs/mod.rs
index d7e9daa..feb37dd 100644
--- a/src/structs/mod.rs
+++ b/src/structs/mod.rs
@@ -1,2 +1,11 @@
-mod de;
-mod ser;
+pub mod de;
+mod error;
+pub mod ser;
+mod settings;
+
+pub use error::{StructError, StructResult};
+pub use ser::ArchiveSerializer;
+pub use settings::{ByteOrder, Settings, VariantIndexType};
+
+#[cfg(test)]
+mod tests;
diff --git a/src/structs/ser.rs b/src/structs/ser.rs
index a3fe291..8aa95a5 100644
--- a/src/structs/ser.rs
+++ b/src/structs/ser.rs
@@ -1,6 +1,343 @@
+use crate::structs::{Settings, StructError, StructResult};
 use crate::ArchiveError;
 use serde::{ser, Serialize};
 
 pub struct ArchiveSerializer {
-    bin: Vec<u8>,
+    bytes: Vec<u8>,
+    settings: Settings,
+}
+
+impl ArchiveSerializer {
+    pub fn new(settings: Settings) -> Self {
+        Self {
+            bytes: Vec::new(),
+            settings,
+        }
+    }
+
+    pub fn to_bytes(self) -> Vec<u8> {
+        self.bytes
+    }
+}
+
+impl ser::Serializer for &mut ArchiveSerializer {
+    type Ok = ();
+    type Error = ArchiveError<StructError>;
+
+    type SerializeSeq = Self;
+    type SerializeTuple = Self;
+    type SerializeTupleStruct = Self;
+    type SerializeTupleVariant = Self;
+    type SerializeMap = Self;
+    type SerializeStruct = Self;
+    type SerializeStructVariant = Self;
+
+    fn serialize_bool(self, v: bool) -> StructResult<()> {
+        self.bytes.push(v as u8);
+        Ok(())
+    }
+
+    fn serialize_i8(self, v: i8) -> StructResult<()> {
+        self.bytes.push(v as u8);
+        Ok(())
+    }
+
+    fn serialize_i16(self, v: i16) -> StructResult<()> {
+        self.bytes.append(&mut self.settings.byte_order.i16(v));
+        Ok(())
+    }
+
+    fn serialize_i32(self, v: i32) -> StructResult<()> {
+        self.bytes.append(&mut self.settings.byte_order.i32(v));
+        Ok(())
+    }
+
+    fn serialize_i64(self, v: i64) -> StructResult<()> {
+        self.bytes.append(&mut self.settings.byte_order.i64(v));
+        Ok(())
+    }
+
+    fn serialize_u8(self, v: u8) -> StructResult<()> {
+        self.bytes.push(v);
+        Ok(())
+    }
+
+    fn serialize_u16(self, v: u16) -> StructResult<()> {
+        self.bytes.append(&mut self.settings.byte_order.u16(v));
+        Ok(())
+    }
+
+    fn serialize_u32(self, v: u32) -> StructResult<()> {
+        self.bytes.append(&mut self.settings.byte_order.u32(v));
+        Ok(())
+    }
+
+    fn serialize_u64(self, v: u64) -> StructResult<()> {
+        self.bytes.append(&mut self.settings.byte_order.u64(v));
+        Ok(())
+    }
+
+    fn serialize_f32(self, v: f32) -> StructResult<()> {
+        self.bytes.append(&mut self.settings.byte_order.f32(v));
+        Ok(())
+    }
+
+    fn serialize_f64(self, v: f64) -> StructResult<()> {
+        self.bytes.append(&mut self.settings.byte_order.f64(v));
+        Ok(())
+    }
+
+    fn serialize_char(self, v: char) -> StructResult<()> {
+        self.bytes.push(v as u8);
+        Ok(())
+    }
+
+    fn serialize_str(self, v: &str) -> StructResult<()> {
+        self.bytes.append(&mut v.as_bytes().to_vec());
+        Ok(())
+    }
+
+    fn serialize_bytes(self, v: &[u8]) -> StructResult<()> {
+        self.bytes.append(&mut v.to_vec());
+        Ok(())
+    }
+
+    fn serialize_none(self) -> StructResult<()> {
+        Ok(())
+    }
+
+    fn serialize_some<T>(self, value: &T) -> StructResult<()>
+    where
+        T: ?Sized + Serialize,
+    {
+        value.serialize(self)
+    }
+
+    fn serialize_unit(self) -> StructResult<()> {
+        Ok(())
+    }
+
+    fn serialize_unit_struct(self, _name: &'static str) -> StructResult<()> {
+        self.serialize_unit()
+    }
+
+    fn serialize_unit_variant(
+        self,
+        _name: &'static str,
+        variant_index: u32,
+        _variant: &'static str,
+    ) -> StructResult<()> {
+        self.bytes.append(
+            &mut self
+                .settings
+                .variant_index_type
+                .cast(variant_index, &self.settings.byte_order)?,
+        );
+        Ok(())
+    }
+
+    fn serialize_newtype_struct<T>(self, _name: &'static str, value: &T) -> StructResult<()>
+    where
+        T: ?Sized + Serialize,
+    {
+        value.serialize(self)
+    }
+
+    fn serialize_newtype_variant<T>(
+        self,
+        _name: &'static str,
+        variant_index: u32,
+        _variant: &'static str,
+        value: &T,
+    ) -> StructResult<()>
+    where
+        T: ?Sized + Serialize,
+    {
+        self.bytes.append(
+            &mut self
+                .settings
+                .variant_index_type
+                .cast(variant_index, &self.settings.byte_order)?,
+        );
+        value.serialize(self)
+    }
+
+    fn serialize_seq(self, _len: Option<usize>) -> StructResult<Self::SerializeSeq> {
+        Ok(self)
+    }
+
+    fn serialize_tuple(self, _len: usize) -> StructResult<Self::SerializeTuple> {
+        Ok(self)
+    }
+
+    fn serialize_tuple_struct(
+        self,
+        _name: &'static str,
+        _len: usize,
+    ) -> StructResult<Self::SerializeTupleStruct> {
+        Ok(self)
+    }
+
+    fn serialize_tuple_variant(
+        self,
+        _name: &'static str,
+        variant_index: u32,
+        _variant: &'static str,
+        _len: usize,
+    ) -> StructResult<Self::SerializeTupleVariant> {
+        self.bytes.append(
+            &mut self
+                .settings
+                .variant_index_type
+                .cast(variant_index, &self.settings.byte_order)?,
+        );
+        Ok(self)
+    }
+
+    fn serialize_map(self, _len: Option<usize>) -> StructResult<Self::SerializeMap> {
+        Ok(self)
+    }
+
+    fn serialize_struct(
+        self,
+        _name: &'static str,
+        _len: usize,
+    ) -> StructResult<Self::SerializeStruct> {
+        Ok(self)
+    }
+
+    fn serialize_struct_variant(
+        self,
+        _name: &'static str,
+        variant_index: u32,
+        _variant: &'static str,
+        _len: usize,
+    ) -> StructResult<Self::SerializeStructVariant> {
+        self.bytes.append(
+            &mut self
+                .settings
+                .variant_index_type
+                .cast(variant_index, &self.settings.byte_order)?,
+        );
+        Ok(self)
+    }
+}
+
+impl ser::SerializeSeq for &mut ArchiveSerializer {
+    type Ok = ();
+    type Error = ArchiveError<StructError>;
+
+    fn serialize_element<T>(&mut self, value: &T) -> StructResult<()>
+    where
+        T: ?Sized + Serialize,
+    {
+        value.serialize(&mut **self)
+    }
+
+    fn end(self) -> StructResult<()> {
+        Ok(())
+    }
+}
+
+impl ser::SerializeTuple for &mut ArchiveSerializer {
+    type Ok = ();
+    type Error = ArchiveError<StructError>;
+
+    fn serialize_element<T>(&mut self, value: &T) -> StructResult<()>
+    where
+        T: ?Sized + Serialize,
+    {
+        value.serialize(&mut **self)
+    }
+
+    fn end(self) -> StructResult<()> {
+        Ok(())
+    }
+}
+
+impl ser::SerializeTupleStruct for &mut ArchiveSerializer {
+    type Ok = ();
+    type Error = ArchiveError<StructError>;
+
+    fn serialize_field<T>(&mut self, value: &T) -> StructResult<()>
+    where
+        T: ?Sized + Serialize,
+    {
+        value.serialize(&mut **self)
+    }
+
+    fn end(self) -> StructResult<()> {
+        Ok(())
+    }
+}
+
+impl ser::SerializeTupleVariant for &mut ArchiveSerializer {
+    type Ok = ();
+    type Error = ArchiveError<StructError>;
+
+    fn serialize_field<T>(&mut self, value: &T) -> StructResult<()>
+    where
+        T: ?Sized + Serialize,
+    {
+        value.serialize(&mut **self)
+    }
+
+    fn end(self) -> StructResult<()> {
+        Ok(())
+    }
+}
+
+impl ser::SerializeMap for &mut ArchiveSerializer {
+    type Ok = ();
+    type Error = ArchiveError<StructError>;
+
+    fn serialize_key<T>(&mut self, key: &T) -> StructResult<()>
+    where
+        T: ?Sized + Serialize,
+    {
+        key.serialize(&mut **self)
+    }
+
+    fn serialize_value<T>(&mut self, value: &T) -> StructResult<()>
+    where
+        T: ?Sized + Serialize,
+    {
+        value.serialize(&mut **self)
+    }
+
+    fn end(self) -> StructResult<()> {
+        Ok(())
+    }
+}
+
+impl ser::SerializeStruct for &mut ArchiveSerializer {
+    type Ok = ();
+    type Error = ArchiveError<StructError>;
+
+    fn serialize_field<T>(&mut self, _key: &'static str, value: &T) -> StructResult<()>
+    where
+        T: ?Sized + Serialize,
+    {
+        value.serialize(&mut **self)
+    }
+
+    fn end(self) -> StructResult<()> {
+        Ok(())
+    }
+}
+
+impl ser::SerializeStructVariant for &mut ArchiveSerializer {
+    type Ok = ();
+    type Error = ArchiveError<StructError>;
+
+    fn serialize_field<T>(&mut self, _key: &'static str, value: &T) -> StructResult<()>
+    where
+        T: ?Sized + Serialize,
+    {
+        value.serialize(&mut **self)
+    }
+
+    fn end(self) -> StructResult<()> {
+        Ok(())
+    }
 }
diff --git a/src/structs/settings.rs b/src/structs/settings.rs
new file mode 100644
index 0000000..63c4d3a
--- /dev/null
+++ b/src/structs/settings.rs
@@ -0,0 +1,110 @@
+use crate::structs::{ArchiveSerializer, StructError, StructResult};
+use serde::Serialize;
+
+pub enum ByteOrder {
+    Le,
+    Be,
+    Ne,
+}
+
+pub enum VariantIndexType {
+    U8,
+    U16,
+    U32,
+    U64,
+    I8,
+    I16,
+    I32,
+    I64,
+}
+
+macro_rules! impl_byte_order {
+    ($($n:ident),+) => {
+        impl ByteOrder {$(
+            pub fn $n(&self, num: $n) -> Vec<u8> {
+                match self {
+                    ByteOrder::Le => num.to_le_bytes().to_vec(),
+                    ByteOrder::Be => num.to_be_bytes().to_vec(),
+                    ByteOrder::Ne => num.to_ne_bytes().to_vec(),
+                }
+            }
+        )+}
+    };
+}
+impl_byte_order!(u8, u16, u32, u64, i8, i16, i32, i64, f32, f64);
+
+impl VariantIndexType {
+    pub fn cast(&self, num: u32, byte_order: &ByteOrder) -> StructResult<Vec<u8>> {
+        Ok(match self {
+            VariantIndexType::U8 => byte_order.u8(num
+                .try_into()
+                .map_err(|_| StructError::IncorrectEnumVariant)?),
+            VariantIndexType::U16 => byte_order.u16(
+                num.try_into()
+                    .map_err(|_| StructError::IncorrectEnumVariant)?,
+            ),
+            VariantIndexType::U32 => byte_order.u32(
+                num.try_into()
+                    .map_err(|_| StructError::IncorrectEnumVariant)?,
+            ),
+            VariantIndexType::U64 => byte_order.u64(
+                num.try_into()
+                    .map_err(|_| StructError::IncorrectEnumVariant)?,
+            ),
+            VariantIndexType::I8 => byte_order.i8(num
+                .try_into()
+                .map_err(|_| StructError::IncorrectEnumVariant)?),
+            VariantIndexType::I16 => byte_order.i16(
+                num.try_into()
+                    .map_err(|_| StructError::IncorrectEnumVariant)?,
+            ),
+            VariantIndexType::I32 => byte_order.i32(
+                num.try_into()
+                    .map_err(|_| StructError::IncorrectEnumVariant)?,
+            ),
+            VariantIndexType::I64 => byte_order.i64(
+                num.try_into()
+                    .map_err(|_| StructError::IncorrectEnumVariant)?,
+            ),
+        })
+    }
+}
+
+pub struct Settings {
+    pub(crate) byte_order: ByteOrder,
+    pub(crate) variant_index_type: VariantIndexType,
+}
+
+impl Settings {
+    pub fn new(byte_order: ByteOrder, variant_index_type: VariantIndexType) -> Self {
+        Self {
+            byte_order,
+            variant_index_type,
+        }
+    }
+
+    pub fn byte_order(mut self, order: ByteOrder) -> Self {
+        self.byte_order = order;
+        self
+    }
+
+    pub fn variant_index_type(mut self, index_type: VariantIndexType) -> Self {
+        self.variant_index_type = index_type;
+        self
+    }
+
+    pub fn serialize(self, object: &impl Serialize) -> StructResult<Vec<u8>> {
+        let mut serializer = ArchiveSerializer::new(self);
+        object.serialize(&mut serializer)?;
+        Ok(serializer.to_bytes())
+    }
+}
+
+impl Default for Settings {
+    fn default() -> Self {
+        Self {
+            byte_order: ByteOrder::Le,
+            variant_index_type: VariantIndexType::U32,
+        }
+    }
+}
diff --git a/src/structs/tests.rs b/src/structs/tests.rs
new file mode 100644
index 0000000..0fa5347
--- /dev/null
+++ b/src/structs/tests.rs
@@ -0,0 +1,88 @@
+use crate::structs::{ByteOrder, Settings, VariantIndexType};
+use serde::Serialize;
+
+#[derive(Serialize)]
+struct Struct<'a> {
+    u8: u8,
+    u16: u16,
+    u32: u32,
+    u64: u64,
+    u8arr: [u8; 3],
+    tuple: (u16, u8),
+    str: &'a str,
+}
+
+#[derive(Serialize)]
+enum Enum<'a> {
+    Unit,
+    Type(u16),
+    Tuple(u16, &'a str),
+    Struct { u32: u32, u64: u64 },
+}
+
+#[test]
+fn struct_serialize_test() {
+    let object = Struct {
+        u8: 42,
+        u16: 26,
+        u32: 69,
+        u64: 11,
+        u8arr: [37, 74, 111],
+        tuple: (24, 13),
+        str: "yes",
+    };
+
+    let bytes = Settings::default()
+        .byte_order(ByteOrder::Le)
+        .serialize(&object)
+        .unwrap();
+    assert_eq!(
+        bytes,
+        //u8|-u16--|----u32-----|----------u64-----------|[0]-[1]--[2]|.0 --.1---|-y----e----s|
+        [42, 26, 0, 69, 0, 0, 0, 11, 0, 0, 0, 0, 0, 0, 0, 37, 74, 111, 24, 0, 13, 121, 101, 115]
+    );
+
+    let bytes = Settings::default()
+        .byte_order(ByteOrder::Be)
+        .serialize(&object)
+        .unwrap();
+    assert_eq!(
+        bytes,
+        //u8|-u16--|----u32-----|----------u64-----------|[0]-[1]--[2]|.0 --.1---|-y----e----s|
+        [42, 0, 26, 0, 0, 0, 69, 0, 0, 0, 0, 0, 0, 0, 11, 37, 74, 111, 0, 24, 13, 121, 101, 115]
+    );
+}
+
+#[test]
+fn enum_serialize_test() {
+    let bytes = Settings::default()
+        .byte_order(ByteOrder::Le)
+        .variant_index_type(VariantIndexType::U8)
+        .serialize(&Enum::Unit)
+        .unwrap();
+    assert_eq!(bytes, [0]);
+
+    let bytes = Settings::default()
+        .byte_order(ByteOrder::Le)
+        .variant_index_type(VariantIndexType::U16)
+        .serialize(&Enum::Type(42))
+        .unwrap();
+    assert_eq!(bytes, [1, 0, 42, 0]);
+
+    let bytes = Settings::default()
+        .byte_order(ByteOrder::Le)
+        .variant_index_type(VariantIndexType::U32)
+        .serialize(&Enum::Tuple(26, "yes"))
+        .unwrap();
+    assert_eq!(bytes, [2, 0, 0, 0, 26, 0, 121, 101, 115]);
+
+    let bytes = Settings::default()
+        .byte_order(ByteOrder::Be)
+        .variant_index_type(VariantIndexType::U64)
+        .serialize(&Enum::Struct { u32: 69, u64: 37 })
+        .unwrap();
+    assert_eq!(
+        bytes,
+        [0, 0, 0, 0, 0, 0, 0, 3, 0, 0, 0, 69, 0, 0, 0, 0, 0, 0, 0, 37]
+    );
+}