3DS: Adapt VFileOpen for 3DS

src/platform/3ds/3ds-vfs.h

@@ -12,6 +12,8 @@
 
 #include <3ds.h>
 
+extern FS_archive sdmcArchive;
+
 struct VFile* VFileOpen3DS(FS_archive* archive, const char* path, int flags);
 
 #endif

src/platform/3ds/main.c

@@ -13,6 +13,8 @@
 
 #include <3ds.h>
 
+FS_archive sdmcArchive;
+
 static void GBA3DSLog(struct GBAThread* thread, enum GBALogLevel level, const char* format, va_list args);
 static Handle logFile;
 
@@ -22,10 +24,9 @@ int main() {
 	hidInit(0);
 	gfxInit(GSP_RGB565_OES, GSP_RGB565_OES, false);
 	fsInit();
-
-	FS_archive sdmcArchive = (FS_archive) {
+	sdmcArchive = (FS_archive) {
 		ARCH_SDMC,
-		(FS_path) { PATH_EMPTY, 1, (u8*)"" },
+		(FS_path) { PATH_EMPTY, 1, (const u8*)"" },
 		0, 0
 	};
 	FSUSER_OpenArchive(0, &sdmcArchive);

src/util/vfs.c

@@ -5,6 +5,10 @@
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 #include "vfs.h"
 
+#ifdef _3DS
+#include "platform/3ds/3ds-vfs.h"
+#endif
+
 struct VFile* VFileOpen(const char* path, int flags) {
 #ifdef USE_VFS_FILE
 	const char* chflags;
@@ -30,6 +34,34 @@ struct VFile* VFileOpen(const char* path, int flags) {
 		break;
 	}
 	return VFileFOpen(path, chflags);
+#elif defined(_3DS)
+	int ctrFlags = FS_OPEN_READ;
+	switch (flags & O_ACCMODE) {
+	case O_WRONLY:
+		ctrFlags = FS_OPEN_WRITE;
+		break;
+	case O_RDWR:
+		ctrFlags = FS_OPEN_READ | FS_OPEN_WRITE;
+		break;
+	case O_RDONLY:
+		ctrFlags = FS_OPEN_READ;
+		break;
+	}
+
+	if (flags & O_CREAT) {
+		ctrFlags |= FS_OPEN_CREATE;
+	}
+	struct VFile* vf = VFileOpen3DS(&sdmcArchive, path, ctrFlags);
+	if (!vf) {
+		return 0;
+	}
+	if (flags & O_TRUNC) {
+		vf->truncate(vf, 0);
+	}
+	if (flags & O_APPEND) {
+		vf->seek(vf, vf->size(vf), SEEK_SET);
+	}
+	return vf;
 #else
 	return VFileOpenFD(path, flags);
 #endif