X-Git-Url: http://git.tdb.fi/?p=libs%2Fcore.git;a=blobdiff_plain;f=source%2Fstringcodec%2Fcodec.h;h=1b893470c6e9462993d10953e36952b4fc08b6d1;hp=00f03b0cc4b4c4f2f4fcd133f2d3fa67e9fac5fb;hb=242a4a9abe1e1113b5eb39aa751aa054f696d7be;hpb=94ee3a1040f67d9de2e92fc34049642b08d65b3e

diff --git a/source/stringcodec/codec.h b/source/stringcodec/codec.h
index 00f03b0..1b89347 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
@@ -40,7 +41,7 @@ public:
 	protected:
 		ErrorMode err_mode;
 
-		Encoder(ErrorMode em): err_mode(em) { }
+		Encoder(ErrorMode em): err_mode(em==DEFAULT ? THROW_ON_ERROR : em) { }
 	public:
 		virtual ~Encoder() { }
 
@@ -91,7 +92,7 @@ public:
 	protected:
 		ErrorMode err_mode;
 
-		Decoder(ErrorMode em): err_mode(em) { }
+		Decoder(ErrorMode em): err_mode(em==DEFAULT ? THROW_ON_ERROR : em) { }
 	public:
 		virtual ~Decoder() { }
 
@@ -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
@@ -153,8 +154,33 @@ 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) { }
+
+	ErrorMode get_error_mode(ErrorMode em = DEFAULT) const
+	{ return (em==DEFAULT ? err_mode : em); }
+
+public:
+	virtual Encoder *create_encoder(ErrorMode em = DEFAULT) const
+	{ return new typename C::Encoder(get_error_mode(em)); }
+
+	virtual Decoder *create_decoder(ErrorMode em = DEFAULT) const
+	{ return new typename C::Decoder(get_error_mode(em)); }
+};
+
+
 /** Convenience function that decodes a string. */
-template<class C>
+template<typename C>
 ustring decode(const std::string &s)
 {
 	typename C::Decoder dec;
@@ -162,7 +188,7 @@ ustring decode(const std::string &s)
 }
 
 /** Convenience function that encodes a string. */
-template<class C>
+template<typename C>
 std::string encode(const ustring &s)
 {
 	typename C::Encoder enc;
@@ -170,7 +196,7 @@ std::string encode(const ustring &s)
 }
 
 /** Convenience function that transcodes a string from one codec to another. */
-template<class F, class T>
+template<typename F, typename T>
 std::string transcode(const std::string &s)
 {
 	return encode<T>(decode<F>(s));