Index: src/OFString.h
==================================================================
--- src/OFString.h
+++ src/OFString.h
@@ -542,10 +542,18 @@
  *
  * \return The OFString as a UTF-8 encoded C string
  */
 - (const char*)cString;
 
+/**
+ * \brief Returns the OFString as a C string in the specified encoding.
+ *
+ * \param encoding The encoding for the C string
+ * \return The OFString as a C string in the specified encoding
+ */
+- (const char*)cStringWithEncoding: (of_string_encoding_t)encoding;;
+
 /**
  * \brief Returns the length of the string in Unicode characters.
  *
  * \return The length of the string in Unicode characters
  */
@@ -556,10 +564,19 @@
  *
  * \return The length of the string which cString would return
  */
 - (size_t)cStringLength;
 
+/**
+ * \brief Returns the number of bytes the string needs in the specified
+ *	  encoding.
+ *
+ * \param encoding The encoding for the string
+ * \return The number of bytes the string needs in the specified encoding.
+ */
+- (size_t)cStringLengthWithEncoding: (of_string_encoding_t)encoding;
+
 /**
  * \brief Compares the OFString to another OFString without caring about the
  *	  case.
  *
  * \param otherString A string to compare with

Index: src/OFString.m
==================================================================
--- src/OFString.m
+++ src/OFString.m
@@ -43,10 +43,11 @@
 #import "OFHTTPRequestFailedException.h"
 #import "OFInitializationFailedException.h"
 #import "OFInvalidArgumentException.h"
 #import "OFInvalidEncodingException.h"
 #import "OFInvalidFormatException.h"
+#import "OFNotImplementedException.h"
 #import "OFOpenFileFailedException.h"
 #import "OFOutOfMemoryException.h"
 #import "OFOutOfRangeException.h"
 
 #import "macros.h"
@@ -1131,10 +1132,26 @@
 
 - (const char*)cString
 {
 	return s->cString;
 }
+
+- (const char*)cStringWithEncoding: (of_string_encoding_t)encoding
+{
+	switch (encoding) {
+	case OF_STRING_ENCODING_UTF_8:
+		return s->cString;
+	case OF_STRING_ENCODING_ASCII:
+		if (s->isUTF8)
+			@throw [OFInvalidEncodingException newWithClass: isa];
+
+		return s->cString;
+	default:
+		@throw [OFNotImplementedException newWithClass: isa
+						      selector: _cmd];
+	}
+}
 
 - (size_t)length
 {
 	return s->length;
 }
@@ -1141,10 +1158,26 @@
 
 - (size_t)cStringLength
 {
 	return s->cStringLength;
 }
+
+- (size_t)cStringLengthWithEncoding: (of_string_encoding_t)encoding
+{
+	switch (encoding) {
+	case OF_STRING_ENCODING_UTF_8:
+		return s->cStringLength;
+	case OF_STRING_ENCODING_ASCII:
+		if (s->isUTF8)
+			@throw [OFInvalidEncodingException newWithClass: isa];
+
+		return s->cStringLength;
+	default:
+		@throw [OFNotImplementedException newWithClass: isa
+						      selector: _cmd];
+	}
+}
 
 - (BOOL)isEqual: (id)object
 {
 	OFString *otherString;