diff --git a/audio/mixer.cpp b/audio/mixer.cpp
index de19807f4..45d6c4c3b 100644
--- a/audio/mixer.cpp
+++ b/audio/mixer.cpp
@@ -98,7 +98,7 @@ Clip *clip_load(const char *filename) {
 		uint8_t *filedata;
 		size_t size;
 		filedata = VFSReadFile(filename, &size);
-		num_samples = stb_vorbis_decode_memory(filedata, size, &num_channels, &data);
+		num_samples = (int)stb_vorbis_decode_memory(filedata, size, &num_channels, &data);
 		if (num_samples <= 0)
 			return NULL;
 		sample_rate = 44100;
diff --git a/file/chunk_file.cpp b/file/chunk_file.cpp
index 738c32ad2..396b07753 100644
--- a/file/chunk_file.cpp
+++ b/file/chunk_file.cpp
@@ -216,7 +216,7 @@ void ChunkFile::writeWString(String str) {
 
 void ChunkFile::writeWString(const std::string &str) {
 	unsigned short *text;
-	int len=str.length();
+	size_t len = str.length();
 #ifdef UNICODE
 #error
 	text = str.c_str();
@@ -234,7 +234,7 @@ void ChunkFile::writeWString(const std::string &str) {
 }
 
 static void toUnicode(const std::string &str, uint16 *t) {
-	for (int i=0; i<(int)str.size(); i++) {
+	for (size_t i = 0; i < str.size(); i++) {
 		*t++ = str[i];
 	}
 	*t++ = '\0';
diff --git a/file/easy_file.cpp b/file/easy_file.cpp
index 30851dff4..f8d73d125 100644
--- a/file/easy_file.cpp
+++ b/file/easy_file.cpp
@@ -49,7 +49,7 @@ std::string LAMEFile::readAll() {
 	return s;
 }
 
-int LAMEFile::write(const void *data, int size) {
+int LAMEFile::write(const void *data, size_t size) {
 	if (isOpen) {
 		return fwrite(data, 1, size, file_); //we return the number of bytes that actually got written
 	} else {
@@ -57,7 +57,7 @@ int LAMEFile::write(const void *data, int size) {
 	}
 }
 
-int LAMEFile::read(void *data, int size) {
+int LAMEFile::read(void *data, size_t size) {
 	if (isOpen) {
 		return fread(data, 1, size, file_);
 	} else {
diff --git a/file/easy_file.h b/file/easy_file.h
index b7114050b..fbc439adf 100644
--- a/file/easy_file.h
+++ b/file/easy_file.h
@@ -29,14 +29,14 @@ public:
 
 	void writeInt(int i);
 	void writeChar(char i);
-	int	write(const void *data, int size);
+	int	write(const void *data, size_t size);
 	void write(const std::string &str) {
 		write((void *)str.data(), str.size());
 	}
 
 	int	readInt();
 	char readChar();
-	int	read(void *data, int size);
+	int	read(void *data, size_t size);
 
 	std::string readAll();
 
diff --git a/file/file_util.cpp b/file/file_util.cpp
index 681a6464b..c95422841 100644
--- a/file/file_util.cpp
+++ b/file/file_util.cpp
@@ -171,11 +171,13 @@ bool getFileInfo(const char *path, FileInfo *fileInfo)
 	if (!GetFileAttributesExA(path, GetFileExInfoStandard, &attrs)) {
 		fileInfo->size = 0;
 		fileInfo->isDirectory = false;
+		fileInfo->exists = false;
 		return false;
 	}
 	fileInfo->size = (uint64_t)attrs.nFileSizeLow | ((uint64_t)attrs.nFileSizeHigh << 32);
 	fileInfo->isDirectory = (attrs.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) != 0;
 	fileInfo->isWritable = (attrs.dwFileAttributes & FILE_ATTRIBUTE_READONLY) == 0;
+	fileInfo->exists = true;
 #else
 	struct stat64 file_info;
 
@@ -186,12 +188,14 @@ bool getFileInfo(const char *path, FileInfo *fileInfo)
 
 	if (result < 0) {
 		WLOG("IsDirectory: stat failed on %s", path);
+		fileInfo->exists = false;
 		return false;
 	}
 
 	fileInfo->isDirectory = S_ISDIR(file_info.st_mode);
 	fileInfo->isWritable = false;
 	fileInfo->size = file_info.st_size;
+	fileInfo->exists = true;
 	// HACK: approximation
 	if (file_info.st_mode & 0200)
 		fileInfo->isWritable = true;
@@ -303,13 +307,25 @@ void deleteFile(const char *file)
 	}
 #endif
 }
+
+void deleteDir(const char *dir)
+{
+#ifdef _WIN32
+	if (!RemoveDirectory(dir)) {
+		ELOG("Error deleting directory %s: %i", dir, GetLastError());
+	}
+#else
+	rmdir(dir);
+#endif
+}
+
 #endif
 
 std::string getDir(const std::string &path)
 {
 	if (path == "/")
 		return path;
-	int n = path.size() - 1;
+	int n = (int)path.size() - 1;
 	while (n >= 0 && path[n] != '\\' && path[n] != '/')
 		n--;
 	std::string cutpath = n > 0 ? path.substr(0, n) : "";
diff --git a/file/file_util.h b/file/file_util.h
index b17a804d0..867f1a9d3 100644
--- a/file/file_util.h
+++ b/file/file_util.h
@@ -37,6 +37,7 @@ std::string getFileExtension(const std::string &fn);
 bool getFileInfo(const char *path, FileInfo *fileInfo);
 size_t getFilesInDir(const char *directory, std::vector<FileInfo> *files, const char *filter = 0);
 void deleteFile(const char *file);
+void deleteDir(const char *file);
 bool exists(const std::string &filename);
 void mkDir(const std::string &path);
 std::string getDir(const std::string &path);
diff --git a/file/zip_read.cpp b/file/zip_read.cpp
index 02add6f0f..cb210b703 100644
--- a/file/zip_read.cpp
+++ b/file/zip_read.cpp
@@ -236,9 +236,9 @@ void VFSShutdown() {
 }
 
 uint8_t *VFSReadFile(const char *filename, size_t *size) {
-	int fn_len = strlen(filename);
+	int fn_len = (int)strlen(filename);
 	for (int i = 0; i < num_entries; i++) {
-		int prefix_len = strlen(entries[i].prefix);
+		int prefix_len = (int)strlen(entries[i].prefix);
 		if (prefix_len >= fn_len) continue;
 		if (0 == memcmp(filename, entries[i].prefix, prefix_len)) {
 			ILOG("Prefix match: %s (%s) -> %s", entries[i].prefix, filename, filename + prefix_len);
@@ -256,9 +256,9 @@ uint8_t *VFSReadFile(const char *filename, size_t *size) {
 
 bool VFSGetFileListing(const char *path, std::vector<FileInfo> *listing, const char *filter)
 {
-	int fn_len = strlen(path);
+	int fn_len = (int)strlen(path);
 	for (int i = 0; i < num_entries; i++) {
-		int prefix_len = strlen(entries[i].prefix);
+		int prefix_len = (int)strlen(entries[i].prefix);
 		if (prefix_len >= fn_len) continue;
 		if (0 == memcmp(path, entries[i].prefix, prefix_len)) {
 			if (entries[i].reader->GetFileListing(path + prefix_len, listing, filter))
@@ -273,9 +273,9 @@ bool VFSGetFileListing(const char *path, std::vector<FileInfo> *listing, const c
 
 bool VFSGetFileInfo(const char *path, FileInfo *info)
 {
-	int fn_len = strlen(path);
+	int fn_len = (int)strlen(path);
 	for (int i = 0; i < num_entries; i++) {
-		int prefix_len = strlen(entries[i].prefix);
+		int prefix_len = (int)strlen(entries[i].prefix);
 		if (prefix_len >= fn_len) continue;
 		if (0 == memcmp(path, entries[i].prefix, prefix_len)) {
 			return entries[i].reader->GetFileInfo(path + prefix_len, info);
diff --git a/image/zim_load.cpp b/image/zim_load.cpp
index 7b5bf3e85..5f78345ed 100644
--- a/image/zim_load.cpp
+++ b/image/zim_load.cpp
@@ -147,7 +147,7 @@ int LoadZIM(const char *filename, int *width, int *height, int *format, uint8_t
 	if (!buffer) {
 		return 0;
 	}
-	int retval = LoadZIMPtr(buffer, size, width, height, format, image);
+	int retval = LoadZIMPtr(buffer, (int)size, width, height, format, image);
 	if (!retval) {
 		ELOG("Not a valid ZIM file: %s", filename);
 	}