Rename state to stateData and fix precondition

Author: p-x9

Sources/MachOKit/LoadCommand/ThreadCommand.swift

@@ -45,13 +45,17 @@ extension ThreadCommand {
         return count
     }
 
-    public func state(cmdsStart: UnsafeRawPointer) -> Data? {
+    public func stateData(cmdsStart: UnsafeRawPointer) -> Data? {
         guard let count = count(cmdsStart: cmdsStart) else {
             return nil
         }
+
         let stateSizeExpected = Int(count) * MemoryLayout<UInt32>.size
         let stateSize = Int(layout.cmdsize) - layoutSize - 2 * MemoryLayout<UInt32>.size
-        guard stateSizeExpected == stateSize else { return nil }
+
+        // consider alignment
+        guard stateSizeExpected <= stateSize else { return nil }
+
         let ptr = cmdsStart
             .advanced(by: offset)
             .advanced(by: layoutSize)
@@ -89,13 +93,17 @@ extension ThreadCommand {
         return count
     }
 
-    public func state(in machO: MachOFile) -> Data? {
+    public func stateData(in machO: MachOFile) -> Data? {
         guard let count = count(in: machO) else {
             return nil
         }
+
         let stateSizeExpected = Int(count) * MemoryLayout<UInt32>.size
         let stateSize = Int(layout.cmdsize) - layoutSize - 2 * MemoryLayout<UInt32>.size
-        guard stateSizeExpected == stateSize else { return nil }
+
+        // consider alignment
+        guard stateSizeExpected <= stateSize else { return nil }
+
         let offset = machO.cmdsStartOffset + offset + layoutSize + 2 * MemoryLayout<UInt32>.size
 
         return machO.fileHandle.readData(

Tests/MachOKitTests/MachOFilePrintTests.swift

@@ -473,7 +473,7 @@ extension MachOFilePrintTests {
                   )?.description ?? "unknown"
             )
             print("Count:", command.count(in: machO) ?? 0)
-            if let state = command.state(in: machO) {
+            if let state = command.stateData(in: machO) {
                 print(
                     "State:",
                     state.withUnsafeBytes {

Tests/MachOKitTests/MachOPrintTests.swift

@@ -400,7 +400,7 @@ extension MachOPrintTests {
                   )?.description ?? "unknown"
             )
             print("Count:", command.count(cmdsStart: machO.cmdsStartPtr) ?? 0)
-            if let state = command.state(cmdsStart: machO.cmdsStartPtr) {
+            if let state = command.stateData(cmdsStart: machO.cmdsStartPtr) {
                 print(
                     "State:",
                     state.withUnsafeBytes {