Add willplus support

src/utils/mod.rs

@@ -13,4 +13,6 @@ pub mod files;
 pub mod img;
 pub mod macros;
 pub mod name_replacement;
+#[cfg(feature = "utils-str")]
+pub mod str;
 pub mod struct_pack;

src/utils/str.rs

@@ -0,0 +1,19 @@
+use crate::types::*;
+use crate::utils::encoding::*;
+use anyhow::Result;
+use unicode_segmentation::UnicodeSegmentation;
+
+/// Truncate a string to a specified length, encoding it with the given encoding.
+/// Output size may less than or equal to the specified length.
+pub fn truncate_string(s: &str, length: usize, encoding: Encoding, check: bool) -> Result<Vec<u8>> {
+    let vec: Vec<_> = UnicodeSegmentation::graphemes(s, true).collect();
+    let mut result = Vec::new();
+    for graphemes in vec {
+        let data = encode_string(encoding, graphemes, check)?;
+        if result.len() + data.len() > length {
+            break;
+        }
+        result.extend(data);
+    }
+    return Ok(result);
+}