Implement context menu copy functionality for data values (#163)

* Implement context menu copy functionality for data values

* Clippy fixes

objdiff-core/src/arch/mod.rs

@@ -34,11 +34,36 @@ pub enum DataType {
     String,
 }
 
+impl std::fmt::Display for DataType {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        match self {
+            DataType::Int8 => write!(f, "Int8"),
+            DataType::Int16 => write!(f, "Int16"),
+            DataType::Int32 => write!(f, "Int32"),
+            DataType::Int64 => write!(f, "Int64"),
+            DataType::Int128 => write!(f, "Int128"),
+            DataType::Float => write!(f, "Float"),
+            DataType::Double => write!(f, "Double"),
+            DataType::Bytes => write!(f, "Bytes"),
+            DataType::String => write!(f, "String"),
+        }
+    }
+}
+
 impl DataType {
-    pub fn display_bytes<Endian: ByteOrder>(&self, bytes: &[u8]) -> Option<String> {
+    pub fn display_labels<Endian: ByteOrder>(&self, bytes: &[u8]) -> Vec<String> {
+        let mut strs = Vec::new();
+        for literal in self.display_literals::<Endian>(bytes) {
+            strs.push(format!("{}: {}", self, literal))
+        }
+        strs
+    }
+
+    pub fn display_literals<Endian: ByteOrder>(&self, bytes: &[u8]) -> Vec<String> {
+        let mut strs = Vec::new();
         if self.required_len().is_some_and(|l| bytes.len() < l) {
             log::warn!("Failed to display a symbol value for a symbol whose size is too small for instruction referencing it.");
-            return None;
+            return strs;
         }
         let mut bytes = bytes;
         if self.required_len().is_some_and(|l| bytes.len() > l) {
@@ -56,58 +81,61 @@ impl DataType {
         match self {
             DataType::Int8 => {
                 let i = i8::from_ne_bytes(bytes.try_into().unwrap());
+                strs.push(format!("{:#x}", i));
+
                 if i < 0 {
-                    format!("Int8: {:#x} ({:#x})", i, ReallySigned(i))
-                } else {
-                    format!("Int8: {:#x}", i)
+                    strs.push(format!("{:#x}", ReallySigned(i)));
                 }
             }
             DataType::Int16 => {
                 let i = Endian::read_i16(bytes);
+                strs.push(format!("{:#x}", i));
+
                 if i < 0 {
-                    format!("Int16: {:#x} ({:#x})", i, ReallySigned(i))
-                } else {
-                    format!("Int16: {:#x}", i)
+                    strs.push(format!("{:#x}", ReallySigned(i)));
                 }
             }
             DataType::Int32 => {
                 let i = Endian::read_i32(bytes);
+                strs.push(format!("{:#x}", i));
+
                 if i < 0 {
-                    format!("Int32: {:#x} ({:#x})", i, ReallySigned(i))
-                } else {
-                    format!("Int32: {:#x}", i)
+                    strs.push(format!("{:#x}", ReallySigned(i)));
                 }
             }
             DataType::Int64 => {
                 let i = Endian::read_i64(bytes);
+                strs.push(format!("{:#x}", i));
+
                 if i < 0 {
-                    format!("Int64: {:#x} ({:#x})", i, ReallySigned(i))
-                } else {
-                    format!("Int64: {:#x}", i)
+                    strs.push(format!("{:#x}", ReallySigned(i)));
                 }
             }
             DataType::Int128 => {
                 let i = Endian::read_i128(bytes);
+                strs.push(format!("{:#x}", i));
+
                 if i < 0 {
-                    format!("Int128: {:#x} ({:#x})", i, ReallySigned(i))
-                } else {
-                    format!("Int128: {:#x}", i)
+                    strs.push(format!("{:#x}", ReallySigned(i)));
                 }
             }
             DataType::Float => {
-                format!("Float: {:?}f", Endian::read_f32(bytes))
+                strs.push(format!("{:?}f", Endian::read_f32(bytes)));
             }
             DataType::Double => {
-                format!("Double: {:?}", Endian::read_f64(bytes))
+                strs.push(format!("{:?}", Endian::read_f64(bytes)));
             }
             DataType::Bytes => {
-                format!("Bytes: {:#?}", bytes)
+                strs.push(format!("{:#?}", bytes));
             }
             DataType::String => {
-                format!("String: {:?}", CStr::from_bytes_until_nul(bytes).ok()?)
+                if let Ok(cstr) = CStr::from_bytes_until_nul(bytes) {
+                    strs.push(format!("{:?}", cstr));
                 }
             }
-        .into()
+        }
+
+        strs
     }
 
     fn required_len(&self) -> Option<usize> {
@@ -154,19 +182,42 @@ pub trait ObjArch: Send + Sync {
 
     fn guess_data_type(&self, _instruction: &ObjIns) -> Option<DataType> { None }
 
-    fn display_data_type(&self, _ty: DataType, bytes: &[u8]) -> Option<String> {
-        Some(format!("Bytes: {:#x?}", bytes))
+    fn display_data_labels(&self, _ty: DataType, bytes: &[u8]) -> Vec<String> {
+        vec![format!("Bytes: {:#x?}", bytes)]
     }
 
-    fn display_ins_data(&self, ins: &ObjIns) -> Option<String> {
-        let reloc = ins.reloc.as_ref()?;
-        if reloc.addend >= 0 && reloc.target.bytes.len() > reloc.addend as usize {
-            self.guess_data_type(ins).and_then(|ty| {
-                self.display_data_type(ty, &reloc.target.bytes[reloc.addend as usize..])
-            })
-        } else {
-            None
+    fn display_data_literals(&self, _ty: DataType, bytes: &[u8]) -> Vec<String> {
+        vec![format!("{:#?}", bytes)]
     }
+
+    fn display_ins_data_labels(&self, ins: &ObjIns) -> Vec<String> {
+        let Some(reloc) = ins.reloc.as_ref() else {
+            return Vec::new();
+        };
+        if reloc.addend >= 0 && reloc.target.bytes.len() > reloc.addend as usize {
+            return self
+                .guess_data_type(ins)
+                .map(|ty| {
+                    self.display_data_labels(ty, &reloc.target.bytes[reloc.addend as usize..])
+                })
+                .unwrap_or_default();
+        }
+        Vec::new()
+    }
+
+    fn display_ins_data_literals(&self, ins: &ObjIns) -> Vec<String> {
+        let Some(reloc) = ins.reloc.as_ref() else {
+            return Vec::new();
+        };
+        if reloc.addend >= 0 && reloc.target.bytes.len() > reloc.addend as usize {
+            return self
+                .guess_data_type(ins)
+                .map(|ty| {
+                    self.display_data_literals(ty, &reloc.target.bytes[reloc.addend as usize..])
+                })
+                .unwrap_or_default();
+        }
+        Vec::new()
     }
 
     // Downcast methods

objdiff-core/src/arch/ppc.rs

@@ -221,8 +221,12 @@ impl ObjArch for ObjArchPpc {
         guess_data_type_from_load_store_inst_op(Opcode::from(instruction.op as u8))
     }
 
-    fn display_data_type(&self, ty: DataType, bytes: &[u8]) -> Option<String> {
-        ty.display_bytes::<BigEndian>(bytes)
+    fn display_data_labels(&self, ty: DataType, bytes: &[u8]) -> Vec<String> {
+        ty.display_labels::<BigEndian>(bytes)
+    }
+
+    fn display_data_literals(&self, ty: DataType, bytes: &[u8]) -> Vec<String> {
+        ty.display_literals::<BigEndian>(bytes)
     }
 
     fn ppc(&self) -> Option<&ObjArchPpc> { Some(self) }

objdiff-core/src/diff/code.rs

@@ -245,8 +245,8 @@ fn reloc_eq(
                     || address_eq(left, right))
                 && (config.function_reloc_diffs == FunctionRelocDiffs::NameAddress
                     || left.target.kind != ObjSymbolKind::Object
-                    || left_obj.arch.display_ins_data(left_ins)
-                        == left_obj.arch.display_ins_data(right_ins))
+                    || left_obj.arch.display_ins_data_labels(left_ins)
+                        == left_obj.arch.display_ins_data_labels(right_ins))
         }
         (Some(_), None) => false,
         (None, Some(_)) => {

objdiff-gui/src/views/function_diff.rs

@@ -149,8 +149,8 @@ fn ins_hover_ui(
                     appearance.highlight_color,
                     format!("Size: {:x}", reloc.target.size),
                 );
-                if let Some(s) = obj.arch.display_ins_data(ins) {
-                    ui.colored_label(appearance.highlight_color, s);
+                for label in obj.arch.display_ins_data_labels(ins) {
+                    ui.colored_label(appearance.highlight_color, label);
                 }
             } else {
                 ui.colored_label(appearance.highlight_color, "Extern".to_string());
@@ -163,7 +163,13 @@ fn ins_hover_ui(
     });
 }
 
-fn ins_context_menu(ui: &mut egui::Ui, section: &ObjSection, ins: &ObjIns, symbol: &ObjSymbol) {
+fn ins_context_menu(
+    ui: &mut egui::Ui,
+    obj: &ObjInfo,
+    section: &ObjSection,
+    ins: &ObjIns,
+    symbol: &ObjSymbol,
+) {
     ui.scope(|ui| {
         ui.style_mut().override_text_style = Some(egui::TextStyle::Monospace);
         ui.style_mut().wrap_mode = Some(egui::TextWrapMode::Extend);
@@ -219,6 +225,12 @@ fn ins_context_menu(ui: &mut egui::Ui, section: &ObjSection, ins: &ObjIns, symbo
             }
         }
         if let Some(reloc) = &ins.reloc {
+            for literal in obj.arch.display_ins_data_literals(ins) {
+                if ui.button(format!("Copy \"{literal}\"")).clicked() {
+                    ui.output_mut(|output| output.copied_text.clone_from(&literal));
+                    ui.close_menu();
+                }
+            }
             if let Some(name) = &reloc.target.demangled_name {
                 if ui.button(format!("Copy \"{name}\"")).clicked() {
                     ui.output_mut(|output| output.copied_text.clone_from(name));
@@ -390,7 +402,7 @@ fn asm_col_ui(
     let ins_diff = &ctx.diff.symbol_diff(symbol_ref).instructions[row.index()];
     let response_cb = |response: Response| {
         if let Some(ins) = &ins_diff.ins {
-            response.context_menu(|ui| ins_context_menu(ui, section, ins, symbol));
+            response.context_menu(|ui| ins_context_menu(ui, ctx.obj, section, ins, symbol));
             response.on_hover_ui_at_pointer(|ui| {
                 ins_hover_ui(ui, ctx.obj, section, ins, symbol, appearance)
             })