3DS: Add VFile3DS type

CMakeLists.txt

@@ -114,7 +114,7 @@ elseif(UNIX)
 	source_group("POSIX-specific code" FILES ${OS_SRC})
 elseif(3DS)
 	list(APPEND OS_LIB ctru)
-	list(APPEND OS_SRC ${CMAKE_SOURCE_DIR}/src/platform/3ds/memory.c)
+	file(GLOB OS_SRC ${CMAKE_SOURCE_DIR}/src/platform/3ds/3ds-*.c)
 	source_group("3DS-specific code" FILES ${OS_SRC})
 	set(BINARY_TYPE STATIC)
 endif()

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

@@ -0,0 +1,134 @@
+/* Copyright (c) 2013-2014 Jeffrey Pfau
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+/* Copyright (c) 2013-2014 Jeffrey Pfau
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+#include "3ds-vfs.h"
+
+#include "util/vfs.h"
+
+#include "util/memory.h"
+
+struct VFile3DS {
+	struct VFile d;
+
+	Handle handle;
+	u64 offset;
+};
+
+static bool _vf3dClose(struct VFile* vf);
+static off_t _vf3dSeek(struct VFile* vf, off_t offset, int whence);
+static ssize_t _vf3dRead(struct VFile* vf, void* buffer, size_t size);
+static ssize_t _vf3dWrite(struct VFile* vf, const void* buffer, size_t size);
+static void* _vf3dMap(struct VFile* vf, size_t size, int flags);
+static void _vf3dUnmap(struct VFile* vf, void* memory, size_t size);
+static void _vf3dTruncate(struct VFile* vf, size_t size);
+
+struct VFile* VFileOpen3DS(FS_archive archive, const char* path, int flags) {
+	struct VFile3DS* vf3d = malloc(sizeof(struct VFile3DS));
+	if (!vf3d) {
+		return 0;
+	}
+
+	int newFlags = 0;
+	if (flags & O_RDONLY) {
+		newFlags |= FS_OPEN_READ;
+	}
+	if (flags & O_WRONLY) {
+		newFlags |= FS_OPEN_WRITE;		
+	}
+	if (flags & O_CREAT) {
+		newFlags |= FS_OPEN_CREATE;
+	}
+
+	FS_path lowPath = FS_makePath(PATH_CHAR, path);
+	if (FSUSER_OpenFileDirectly(0, &vf3d->handle, archive, lowPath, newFlags, FS_ATTRIBUTE_NONE)) {
+		free(vf3d);
+		return 0;
+	}
+
+	vf3d->offset = 0;
+
+	vf3d->d.close = _vf3dClose;
+	vf3d->d.seek = _vf3dSeek;
+	vf3d->d.read = _vf3dRead;
+	vf3d->d.readline = 0;
+	vf3d->d.write = _vf3dWrite;
+	vf3d->d.map = _vf3dMap;
+	vf3d->d.unmap = _vf3dUnmap;
+	vf3d->d.truncate = _vf3dTruncate;
+
+	return &vf3d->d;
+}
+
+bool _vf3dClose(struct VFile* vf) {
+	struct VFile3DS* vf3d = (struct VFile3DS*) vf;
+
+	FSFILE_Close(vf3d->handle);
+	svcCloseHandle(vf3d->handle);
+	return true;
+}
+
+off_t _vf3dSeek(struct VFile* vf, off_t offset, int whence) {
+	struct VFile3DS* vf3d = (struct VFile3DS*) vf;
+	u64 size;
+	switch (whence) {
+	case SEEK_SET:
+		vf3d->offset = offset;
+		break;
+	case SEEK_END:
+		FSFILE_GetSize(vf3d->handle, &size);
+		vf3d->offset = size;
+		// Fall through
+	case SEEK_CUR:
+		vf3d->offset += offset;
+		break;
+	}
+	return vf3d->offset;
+}
+
+ssize_t _vf3dRead(struct VFile* vf, void* buffer, size_t size) {
+	struct VFile3DS* vf3d = (struct VFile3DS*) vf;
+	u32 sizeRead;
+	Result res = FSFILE_Read(vf3d->handle, &sizeRead, vf3d->offset, buffer, size);
+	if (res) {
+		return -1;
+	}
+	vf3d->offset += sizeRead;
+	return sizeRead;
+}
+
+ssize_t _vf3dWrite(struct VFile* vf, const void* buffer, size_t size) {
+	struct VFile3DS* vf3d = (struct VFile3DS*) vf;
+	u32 sizeWritten;
+	Result res = FSFILE_Write(vf3d->handle, &sizeWritten, vf3d->offset, buffer, size, FS_WRITE_FLUSH);
+	if (res) {
+		return -1;
+	}
+	vf3d->offset += sizeWritten;
+	return sizeWritten;
+}
+
+// TODO: Move these to a generic implementation
+static void* _vf3dMap(struct VFile* vf, size_t size, int flags) {
+	UNUSED(flags);
+	void* buffer = anonymousMemoryMap(size);
+	vf->read(vf, buffer, size);
+	vf->seek(vf, -(off_t) size, SEEK_CUR);
+	return buffer;
+}
+
+static void _vf3dUnmap(struct VFile* vf, void* memory, size_t size) {
+	UNUSED(vf);
+	mappedMemoryFree(memory, size);
+}
+
+static void _vf3dTruncate(struct VFile* vf, size_t size) {
+	struct VFile3DS* vf3d = (struct VFile3DS*) vf;
+	FSFILE_SetSize(vf3d->handle, size);
+}

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

@@ -0,0 +1,13 @@
+/* Copyright (c) 2013-2014 Jeffrey Pfau
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+/* Copyright (c) 2013-2014 Jeffrey Pfau
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+#include <3ds.h>
+
+struct VFile* VFileOpen3DS(FS_archive archive, const char* path, int flags);