X-Git-Url: http://git.tdb.fi/?p=libs%2Fcore.git;a=blobdiff_plain;f=source%2Fstringcodec%2Fcodec.h;h=c70e052dd1b35e819a591327777f8eec4dbdc9bd;hp=00f03b0cc4b4c4f2f4fcd133f2d3fa67e9fac5fb;hb=d3fc0bf0f20f100f2831188c1ce21461d21c2c7a;hpb=94ee3a1040f67d9de2e92fc34049642b08d65b3e

diff --git a/source/stringcodec/codec.h b/source/stringcodec/codec.h
index 00f03b0..c70e052 100644
--- a/source/stringcodec/codec.h
+++ b/source/stringcodec/codec.h
@@ -10,6 +10,7 @@ namespace StringCodec {
 
 enum ErrorMode
 {
+	DEFAULT,
 	THROW_ON_ERROR,
 	IGNORE_ERRORS,
 	TRANSLITERATE
@@ -138,10 +139,10 @@ public:
 	virtual const char *get_name() const = 0;
 
 	/** Creates an encoder for this codec. */
-	virtual Encoder *create_encoder(ErrorMode err_mode = THROW_ON_ERROR) const = 0;
+	virtual Encoder *create_encoder(ErrorMode err_mode = DEFAULT) const = 0;
 
 	/** Creates a decoder for this codec. */
-	virtual Decoder *create_decoder(ErrorMode err_mode = THROW_ON_ERROR) const = 0;
+	virtual Decoder *create_decoder(ErrorMode err_mode = DEFAULT) const = 0;
 
 	/** Determines whether the given string can be successfully decoded with
 	this codec.  Note that this function returning true does not guarantee that
@@ -153,6 +154,28 @@ public:
 typedef Codec::Encoder Encoder;
 typedef Codec::Decoder Decoder;
 
+
+/**
+A helper class to provide some common functionality.
+*/
+template<typename C>
+class StandardCodec: public Codec
+{
+private:
+	ErrorMode err_mode;
+
+protected:
+	StandardCodec(ErrorMode em): err_mode(em==DEFAULT ? THROW_ON_ERROR : em) { }
+
+public:
+	virtual Encoder *create_encoder(ErrorMode em = DEFAULT) const
+	{ return new typename C::Encoder(em==DEFAULT ? err_mode : em); }
+
+	virtual Decoder *create_decoder(ErrorMode em = DEFAULT) const
+	{ return new typename C::Decoder(em==DEFAULT ? err_mode : em); }
+};
+
+
 /** Convenience function that decodes a string. */
 template<class C>
 ustring decode(const std::string &s)