From a66c99119bba028425d3ee855a3d2faf0eb6b739 Mon Sep 17 00:00:00 2001
From: Nathan Rajlich <n@n8.io>
Date: Fri, 22 Nov 2024 01:40:54 -0800
Subject: [PATCH] Add `Switch.FileSystem.openSdmc()`

---
 .changeset/calm-carpets-visit.md           |  5 +++++
 packages/runtime/src/$.ts                  |  1 +
 packages/runtime/src/switch/file-system.ts | 15 +++++++++++++++
 source/fsdev.c                             | 16 ++++++++++++++++
 4 files changed, 37 insertions(+)
 create mode 100644 .changeset/calm-carpets-visit.md

diff --git a/.changeset/calm-carpets-visit.md b/.changeset/calm-carpets-visit.md
new file mode 100644
index 00000000..c8f8aec9
--- /dev/null
+++ b/.changeset/calm-carpets-visit.md
@@ -0,0 +1,5 @@
+---
+"@nx.js/runtime": patch
+---
+
+Add `Switch.FileSystem.openSdmc()`
diff --git a/packages/runtime/src/$.ts b/packages/runtime/src/$.ts
index ff597785..e4d02100 100644
--- a/packages/runtime/src/$.ts
+++ b/packages/runtime/src/$.ts
@@ -164,6 +164,7 @@ export interface Init {
 	fsInit(c: ClassOf<FileSystem>): void;
 	fsMount(fs: FileSystem, name: string): void;
 	fsOpenBis(id: number): FileSystem;
+	fsOpenSdmc(): FileSystem;
 	saveDataInit(c: ClassOf<SaveData>): void;
 	saveDataCreateSync(info: SaveDataCreationInfo, nacp?: ArrayBuffer): void;
 	saveDataMount(saveData: SaveData, name: string): void;
diff --git a/packages/runtime/src/switch/file-system.ts b/packages/runtime/src/switch/file-system.ts
index fb475733..9ea3d930 100644
--- a/packages/runtime/src/switch/file-system.ts
+++ b/packages/runtime/src/switch/file-system.ts
@@ -66,5 +66,20 @@ export class FileSystem {
 	static openBis(id: number): FileSystem {
 		return proto($.fsOpenBis(id), FileSystem);
 	}
+
+	/**
+	 * Opens a file system partition for the SD card.
+	 *
+	 * @example
+	 *
+	 * ```typescript
+	 * const fs = Switch.FileSystem.openSdmc();
+	 * console.log(fs.freeSpace());
+	 * console.log(fs.totalSpace());
+	 * ```
+	 */
+	static openSdmc(): FileSystem {
+		return proto($.fsOpenSdmc(), FileSystem);
+	}
 }
 $.fsInit(FileSystem);
diff --git a/source/fsdev.c b/source/fsdev.c
index 7deb62b4..627221eb 100644
--- a/source/fsdev.c
+++ b/source/fsdev.c
@@ -102,6 +102,21 @@ static JSValue nx_fs_open_bis(JSContext *ctx, JSValueConst this_val, int argc,
 	return obj;
 }
 
+static JSValue nx_fs_open_sdmc(JSContext *ctx, JSValueConst this_val, int argc,
+							   JSValueConst *argv) {
+	nx_file_system_t *file_system = js_mallocz(ctx, sizeof(nx_file_system_t));
+	if (!file_system) {
+		return JS_EXCEPTION;
+	}
+	Result rc = fsOpenSdCardFileSystem(&file_system->fs);
+	if (R_FAILED(rc)) {
+		return nx_throw_libnx_error(ctx, rc, "fsOpenSdCardFileSystem()");
+	}
+	JSValue obj = JS_NewObjectClass(ctx, nx_file_system_class_id);
+	JS_SetOpaque(obj, file_system);
+	return obj;
+}
+
 static JSValue nx_fs_free_space(JSContext *ctx, JSValueConst this_val, int argc,
 								JSValueConst *argv) {
 	nx_file_system_t *file_system =
@@ -774,6 +789,7 @@ static const JSCFunctionListEntry function_list[] = {
 	JS_CFUNC_DEF("fsInit", 1, nx_fs_init),
 	JS_CFUNC_DEF("fsMount", 1, nx_fs_mount),
 	JS_CFUNC_DEF("fsOpenBis", 1, nx_fs_open_bis),
+	JS_CFUNC_DEF("fsOpenSdmc", 1, nx_fs_open_sdmc),
 
 	JS_CFUNC_DEF("saveDataInit", 1, nx_save_data_init),
 	JS_CFUNC_DEF("saveDataMount", 1, nx_save_data_mount),