Use wrapping macro

Cargo.lock

@@ -323,6 +323,7 @@ dependencies = [
  "int-enum",
  "lazy_static",
  "msg_tool_macro",
+ "overf",
  "png",
  "rand",
  "serde",
@@ -345,6 +346,17 @@ version = "1.21.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "42f5e15c9953c5e4ccceeb2e7382a716482c34515315f7b03532b8b4e8393d2d"
 
+[[package]]
+name = "overf"
+version = "0.1.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "63f45a6333db8b6985d6648e4f6c7f2aa814c660c0855c6f58ff67fea8b9f24b"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
 [[package]]
 name = "png"
 version = "0.17.16"

Cargo.toml

@@ -13,6 +13,7 @@ flate2 = { version = "1.1", optional = true }
 int-enum = { version = "1.2", optional = true }
 lazy_static = "1.5.0"
 msg_tool_macro = { path = "./msg_tool_macro" }
+overf = "0.1"
 png = { version = "0.17", optional = true }
 rand = { version = "0.9", optional = true }
 serde = { version = "1", features = ["derive"] }

src/scripts/cat_system/image/hg3.rs

@@ -7,6 +7,7 @@ use crate::utils::struct_pack::*;
 use anyhow::Result;
 use flate2::{Decompress, FlushDecompress};
 use msg_tool_macro::*;
+use overf::wrapping;
 use std::io::{Read, Seek, Write};
 
 #[derive(Debug)]
@@ -205,7 +206,7 @@ impl<'a, T: Iterator<Item = &'a (Hg3Entry, usize, usize)> + 'a> Iterator for Hg3
                         name: format!("{:04}", self.index - 1),
                         data: img,
                     }))
-                },
+                }
                 Err(e) => Some(Err(e)),
             }
         } else {
@@ -324,15 +325,20 @@ impl<'a> Hg3Reader<'a> {
         }
         let stride = self.m_info.width * self.m_pixel_size;
         for x in self.m_pixel_size..stride {
-            output[x as usize] =
-                output[x as usize].wrapping_add(output[x as usize - self.m_pixel_size as usize]);
+            let target = x as usize - self.m_pixel_size as usize;
+            wrapping! {
+                output[x as usize] += output[target];
+            }
         }
         let mut prev = 0;
         for _ in 1..self.m_info.height {
             let line = prev + stride;
             for x in 0..stride {
-                output[line as usize + x as usize] = output[line as usize + x as usize]
-                    .wrapping_add(output[prev as usize + x as usize]);
+                let src = line as usize + x as usize;
+                let target = prev as usize + x as usize;
+                wrapping! {
+                    output[src] += output[target];
+                }
             }
             prev = line;
         }