Add path_join

Author: AlexKnauth

src/game_engine/unity/mono.rs

@@ -14,7 +14,7 @@ use crate::file_format::macho;
 #[cfg(feature = "alloc")]
 use alloc::vec::Vec;
 #[cfg(feature = "alloc")]
-use std::{path::Path, fs::File, io, io::Read};
+use std::{fs::File, io, io::Read};
 
 #[cfg(feature = "derive")]
 pub use asr_derive::MonoClass as Class;
@@ -143,9 +143,9 @@ impl Module {
         let offsets = Offsets::new(version, is_64_bit, BinaryFormat::MachO);
 
         let process_path = process.get_path().ok()?;
-        let contents_path = Path::new(path_parent(path_parent(&process_path)?)?);
-        let mono_module_path = contents_path.join("Frameworks").join("libmonobdwgc-2.0.dylib");
-        let mono_module_bytes = file_read_all_bytes(mono_module_path).ok()?;
+        let contents_path = path_parent(path_parent(&process_path)?)?;
+        let mono_module_path = path_join(&path_join(contents_path, "Frameworks"), "libmonobdwgc-2.0.dylib");
+        let mono_module_bytes = file_read_all_bytes(&mono_module_path).ok()?;
 
         let mono_assembly_foreach_offset: u32 = macho::get_function_offset(&mono_module_bytes, b"_mono_assembly_foreach")?;
 
@@ -832,9 +832,9 @@ fn detect_version_dylib(process: &Process) -> Option<Version> {
     const UNITY_PLAYER_VERSION_LEN: usize = UNITY_PLAYER_VERSION.len();
 
     let process_path = process.get_path().ok()?;
-    let contents_path = Path::new(path_parent(path_parent(&process_path)?)?);
-    let info_plist_path = contents_path.join("Info.plist");
-    let info_plist_bytes = file_read_all_bytes(info_plist_path).ok()?;
+    let contents_path = path_parent(path_parent(&process_path)?)?;
+    let info_plist_path = path_join(contents_path, "Info.plist");
+    let info_plist_bytes = file_read_all_bytes(&info_plist_path).ok()?;
     // example: "Unity Player version 2020.2.2f1 "
     let upv = memchr::memmem::find(&info_plist_bytes, UNITY_PLAYER_VERSION)?;
     let version_string: ArrayCString<6> = macho::slice_read(&info_plist_bytes, upv + UNITY_PLAYER_VERSION_LEN).ok()?;
@@ -886,7 +886,12 @@ fn path_parent(path: &str) -> Option<&str> {
 }
 
 #[cfg(feature = "alloc")]
-fn file_read_all_bytes<P: AsRef<Path>>(path: P) -> io::Result<Vec<u8>> {
+fn path_join(base: &str, sub: &str) -> String {
+    format!("{}/{}", base, sub)
+}
+
+#[cfg(feature = "alloc")]
+fn file_read_all_bytes(path: &str) -> io::Result<Vec<u8>> {
     let mut f = File::open(path)?;
     let mut buffer: Vec<u8> = Vec::new();
     f.read_to_end(&mut buffer)?;