X-Git-Url: http://git.tdb.fi/?p=libs%2Fcore.git;a=blobdiff_plain;f=source%2Fstringcodec%2Fcodec.h;h=5e67d46049078f3555994eeca393ce9691bf75f8;hp=00f03b0cc4b4c4f2f4fcd133f2d3fa67e9fac5fb;hb=HEAD;hpb=94ee3a1040f67d9de2e92fc34049642b08d65b3e

diff --git a/source/stringcodec/codec.h b/source/stringcodec/codec.h
index 00f03b0..f53bae5 100644
--- a/source/stringcodec/codec.h
+++ b/source/stringcodec/codec.h
@@ -2,6 +2,7 @@
 #define MSP_STRINGCODEC_CODEC_H_
 
 #include <string>
+#include <msp/core/mspcore_api.h>
 #include "except.h"
 #include "ustring.h"
 
@@ -10,6 +11,7 @@ namespace StringCodec {
 
 enum ErrorMode
 {
+	DEFAULT,
 	THROW_ON_ERROR,
 	IGNORE_ERRORS,
 	TRANSLITERATE
@@ -24,7 +26,7 @@ Unicode strings are represented as ustrings.  An std::string is considered to
 be an encoded sequence of bytes.  A codec is able to determine if an encoded
 string could be decoded with it.
 */
-class Codec
+class MSPCORE_API Codec
 {
 public:
 	/**
@@ -35,14 +37,14 @@ public:
 	may find it useful or necessary to implement some other functions too
 	(particularly sync and reset for stateful codecs).
 	*/
-	class Encoder
+	class MSPCORE_API Encoder
 	{
 	protected:
-		ErrorMode err_mode;
+		ErrorMode err_mode = THROW_ON_ERROR;
 
-		Encoder(ErrorMode em): err_mode(em) { }
+		Encoder(ErrorMode em): err_mode(em==DEFAULT ? THROW_ON_ERROR : em) { }
 	public:
-		virtual ~Encoder() { }
+		virtual ~Encoder() = default;
 
 		/** Encodes a single unicode character.  If the character can't be
 		represented in this encoding, error() should be called. */
@@ -86,14 +88,14 @@ public:
 
 	Each codec class should contain an Decoder class derived from this.
 	*/
-	class Decoder
+	class MSPCORE_API Decoder
 	{
 	protected:
-		ErrorMode err_mode;
+		ErrorMode err_mode = THROW_ON_ERROR;
 
-		Decoder(ErrorMode em): err_mode(em) { }
+		Decoder(ErrorMode em): err_mode(em==DEFAULT ? THROW_ON_ERROR : em) { }
 	public:
-		virtual ~Decoder() { }
+		virtual ~Decoder() = default;
 
 		/** Decodes a single character from a string.  The iterator is advanced
 		to the next character.  For stateful codecs, -1 may be returned if a
@@ -130,18 +132,18 @@ public:
 	};
 
 protected:
-	Codec() { }
+	Codec() = default;
 public:
-	virtual ~Codec() { }
+	virtual ~Codec() = default;
 
 	/** Returns the name of the encoding handled by this codec. */
 	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 +155,33 @@ 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 = THROW_ON_ERROR;
+
+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:
+	Encoder *create_encoder(ErrorMode em = DEFAULT) const override
+	{ return new typename C::Encoder(get_error_mode(em)); }
+
+	Decoder *create_decoder(ErrorMode em = DEFAULT) const override
+	{ 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 +189,7 @@ 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 +197,7 @@ 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));
@@ -178,11 +205,11 @@ std::string transcode(const std::string &s)
 
 /** Creates a codec for an encoding by name.  The caller is responsible for
 deleting the codec when it's no longer needed. */
-Codec *create_codec(const std::string &);
+MSPCORE_API Codec *create_codec(const std::string &);
 
 /** Automatically detects the encoding of a string and creates a codec for it.
 The codec must be deleted when it's no longer needed. */
-Codec *detect_codec(const std::string &);
+MSPCORE_API Codec *detect_codec(const std::string &);
 
 } // namespace StringCodec
 } // namespace Msp