@@ -66,10 +66,13 @@
 - initWithPath: (const char*)path
        andMode: (const char*)mode
 {
 	if ((self = [super init])) {
 		if ((fp = fopen(path, mode)) == NULL) {
+			[[OFOpenFileFailedException newWithObject: self
+							  andPath: path
+							  andMode: mode] raise];
 			[self free];
 			return nil;
 		}
 	}
 	return self;
@@ -84,11 +87,11 @@
 - (BOOL)atEndOfFile
 {
 	return (feof(fp) == 0 ? NO : YES);
 }
 
-- (size_t)readIntoBuffer: (char*)buf
+- (size_t)readIntoBuffer: (uint8_t*)buf
 		withSize: (size_t)size
 	       andNItems: (size_t)nitems
 {
 	size_t ret;
 
@@ -98,15 +101,15 @@
 					    andNItems: nitems] raise];
 
 	return ret;
 }
 
-- (char*)readWithSize: (size_t)size
-	    andNItems: (size_t)nitems
+- (uint8_t*)readWithSize: (size_t)size
+	       andNItems: (size_t)nitems
 {
 	uint64_t memsize;
-	char *ret;
+	uint8_t	 *ret;
        
 	if (size >= 0xFFFFFFFF || nitems >= 0xFFFFFFFF ||
 	    (memsize = (uint64_t)nitems * size) > 0xFFFFFFFF) {
 		[[OFOverflowException newWithObject: self] raise];
 		return NULL;
@@ -125,11 +128,11 @@
 	}
 
 	return ret;
 }
 
-- (size_t)writeBuffer: (char*)buf
+- (size_t)writeBuffer: (uint8_t*)buf
 	     withSize: (size_t)size
 	    andNItems: (size_t)nitems
 {
 	size_t ret;