Making leaps to better data serialization

game/math.odin

@@ -1,8 +1,8 @@
 package game
 
 Vec2i :: struct {
-    x: int,
-    y: int,
+    x: i32,
+    y: i32,
 }
 
 vec2i_to_vec2 :: proc(v2i:Vec2i) -> [2]f32 {
@@ -10,43 +10,17 @@ vec2i_to_vec2 :: proc(v2i:Vec2i) -> [2]f32 {
 }
 
 vec2_to_vec2i :: proc(v2:[2]f32) -> Vec2i {
-    return {int(v2.x), int(v2.y)}
+    return {i32(v2.x), i32(v2.y)}
 }
 
-serialize_vec2i :: proc(v:Vec2i) -> [8]byte {
-    data: [8]byte
-    
-    x := serialize_int(v.x)
-    y := serialize_int(v.y)
-
-    for i in 0..<4 {
-        data[i] = x[i]
+to_bytes :: proc(v: $T) -> [size_of(T)]u8 {
+    val := v
+    encoded_bytes := (^[size_of(T)]u8)(&val)
+    return encoded_bytes^
 }
 
-    for i in 0..<4 {
-        data[4 + i] = y[i]
-    }
-    
-    return data
-}
-
-deserialize_vec2i :: proc(data:[]byte) -> Vec2i {
-    x := deserialize_int(data[0:4])
-    y := deserialize_int(data[4:8])
-    return Vec2i{x,y}
-}
-
-serialize_int :: proc(v:int) -> [4]byte {
-    data : [4]byte 
-
-    data[0] = byte(v)
-    data[1] = byte(v >> 8)
-    data[2] = byte(v >> 16)
-    data[3] = byte(v >> 24)
-
-    return data
-}
-
-deserialize_int :: proc(data:[]byte) -> int {
-    return int(data[0]) | int(data[1]) << 8 | int(data[2]) << 16 | int(data[3]) << 24 
+from_bytes :: proc($T:typeid, data: [size_of(T)]u8) -> T {
+    bytes := data
+    decoded_value := (^T)(&bytes)^
+    return decoded_value
 }

tests/test.odin

@@ -1,47 +1,91 @@
 package test
 
-import game "../game"
 import "core:fmt"
-import rl "vendor:raylib"
-import "core:encoding/endian"
+import "core:os" 
+import "core:slice"
+
+my_enum :: enum {
+    val1,val2,
+}
+
+my_struct :: struct {
+    me: my_enum,
+    num: i32,
+    v: Vec2i
+}
 
 main :: proc() {
+    final_val:my_struct 
 
-    buf : [128]u8
-    my_int : i32 = -32
+    make_struct()
 
-    endian.put_i32(buf[:], .Little, my_int)
-
-    fmt.printfln("u8 buffer: %v", buf)
-
-    decoded_int, err := endian.get_i32(buf[:], .Little) 
-
-    fmt.printfln("Pre-encoding: %v | Decoded int: %v", my_int, decoded_int)
-
-    // nothing := game.Tile {
-    //     type = .NOTHING,
-    //     color = rl.RED,
-    //     tilemap_pos = {3,3},
-    //     resource = .NOTHING,
-    //     interaction = .NOTHING,
-    // }
-
-    // ts := game.serialize_tile(nothing)
-
-    // fmt.printfln("Expecting size: %v, Got size: %v", size_of(game.Tile), len(ts))
-    // fmt.printfln("Pre-serialized Tile: %v", nothing)
-
-    // dst := game.deserialize_tile(ts)
-    // fmt.printfln("Post-serialized tile: %v", dst)
-
-    // y : int
-    // chunk := game.Chunk {
-    //     position = {0,1}
-    // }
-
-    // for x in 0..<len(chunk.tiles) {
-    //     for y in 0..<len(chunk.tiles) {
-    //         chunk.tiles[x][y] = nothing
-    //     }
-    // }
+    data := load_file("test1")
+    if data != nil {
+        if len(data) == size_of(my_struct) {
+            static_bytes: [size_of(my_struct)]u8
+            copy(static_bytes[:], data)
+            final_val = from_bytes(my_struct, static_bytes)
         }
+    }
+
+    fmt.printfln("Decoded Val: %v", final_val)
+}
+
+make_struct :: proc() {
+    ms := my_struct {
+        me = .val1,
+        num = 345,
+        v = {45,75}
+    }
+
+    fmt.printfln("Initial value: %v", ms)
+
+    bytes := to_bytes(ms)
+
+    fmt.printfln("Bytes: %v", bytes)
+    save_file("test1", bytes[:])
+}
+
+load_file :: proc(path:string) -> []u8 {
+    if !os.is_file(path) {
+        fmt.printfln("File not found")
+        return nil
+    }
+
+    data, err := os.read_entire_file_from_filename_or_err(path)
+    if err != nil {
+        fmt.printfln("File read error: %v", err)
+        return nil
+    }
+
+    fmt.printfln("Loading file: %v", path)
+    return data
+}
+
+save_file :: proc(path:string, data:[]u8) {
+    err := os.write_entire_file_or_err(path, data)
+    if err != nil {
+        fmt.printfln("File write error: %v", err)
+        return
+    }
+
+    fmt.printfln("Wrote file: %v", path)
+}
+
+Vec2i :: struct {
+    x: i32,
+    y: i32,
+}
+
+to_bytes :: proc(v: $T) -> [size_of(T)]u8 {
+    val := v
+    encoded_bytes := (^[size_of(T)]u8)(&val)
+    return encoded_bytes^
+}
+
+from_bytes :: proc($T:typeid, data: [size_of(T)]u8) -> T {
+    bytes := data
+    decoded_value := (^T)(&bytes)^
+    return decoded_value
+}
+