Add bindings for the new game dir detection

src/existing_dirs.rs

@@ -0,0 +1,82 @@
+// SPDX-FileCopyrightText: 2024 Joshua Goins <josh@redstrate.com>
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+use std::ffi::c_char;
+use std::mem;
+use std::ptr::null_mut;
+use physis::existing_dirs::{ExistingInstallType, find_existing_game_dirs, find_existing_user_dirs};
+use crate::ffi_to_c_string;
+
+/// An existing install location on disk
+#[repr(C)]
+pub struct physis_ExistingGameDirectory {
+    /// The application where this installation was from
+    pub install_type : ExistingInstallType,
+    /// The path to the "main folder" where "game" and "boot" sits
+    pub path: *const c_char
+}
+
+#[repr(C)]
+pub struct physis_ExistingGameDirectories {
+    pub count: u32,
+    pub entries: *mut physis_ExistingGameDirectory
+}
+
+#[no_mangle]
+pub extern "C" fn physis_find_existing_game_dirs() -> physis_ExistingGameDirectories {
+    let dirs = find_existing_user_dirs();
+
+    let mut c_dirs = Vec::new();
+    for dir in dirs {
+        c_dirs.push(physis_ExistingGameDirectory {
+            path: ffi_to_c_string(&dir.path),
+            install_type: dir.install_type
+        });
+    }
+
+    let new_dirs = physis_ExistingGameDirectories {
+        count: c_dirs.len() as u32,
+        entries: c_dirs.as_mut_ptr()
+    };
+
+    mem::forget(c_dirs);
+
+    new_dirs
+}
+
+/// An existing user directory
+#[repr(C)]
+pub struct physis_ExistingUserDirectory {
+    /// The application where this directory was from
+    pub install_type : ExistingInstallType,
+    /// The path to the user folder
+    pub path: *const c_char
+}
+
+#[repr(C)]
+pub struct physis_ExistingUserDirectories {
+    pub count: u32,
+    pub entries: *mut physis_ExistingUserDirectory
+}
+
+#[no_mangle]
+pub extern "C" fn physis_find_existing_user_dirs() -> physis_ExistingUserDirectories {
+    let dirs = find_existing_user_dirs();
+
+    let mut c_dirs = Vec::new();
+    for dir in dirs {
+        c_dirs.push(physis_ExistingUserDirectory {
+            path: ffi_to_c_string(&dir.path),
+            install_type: dir.install_type
+        });
+    }
+
+    let new_dirs = physis_ExistingUserDirectories {
+        count: c_dirs.len() as u32,
+        entries: c_dirs.as_mut_ptr()
+    };
+
+    mem::forget(c_dirs);
+
+    new_dirs
+}

src/lib.rs

@@ -141,3 +141,4 @@ mod index;
 mod logging;
 
 mod schd;
+mod existing_dirs;