Adding new Bu::Settings system, which works more or less like QSettings from Qt,

only...without qt.

It's the first real system in libbu++ that is going to be all unicode, which
is exciting, but I'm having to actually finish the Bu::UtfString class while I
work on it.  Also exciting.

10 files changed, 336 insertions, 25 deletions

diff --git a/src/tests/settings.cpp b/src/tests/settings.cpp
new file mode 100644
index 0000000..0738cb7
--- /dev/null
+++ b/src/tests/settings.cpp
@@ -0,0 +1,9 @@
+#include "bu/settings.h"
+
+int main()
+{
+        Bu::Settings s("Xagasoft", "Settings");
+
+
+}
+
diff --git a/src/tests/utf.cpp b/src/tests/utf.cpp
index 3418e68..923b611 100644
--- a/src/tests/utf.cpp
+++ b/src/tests/utf.cpp
@@ -1,9 +1,15 @@
 #include <bu/file.h>
 #include <bu/string.h>
 #include <bu/utfstring.h>
+#include <bu/sio.h>
+
+using namespace Bu;
 
 int main()
 {
+        sio << "Code: " << Bu::__calcHashCode( Bu::UtfString("Hello there") )
+                << sio.nl;
+
         Bu::File fIn("utf8.in", Bu::File::Read );
         Bu::String sUtf8;
         char buf[4096];
diff --git a/src/unstable/settings.cpp b/src/unstable/settings.cpp
new file mode 100644
index 0000000..e993250
--- /dev/null
+++ b/src/unstable/settings.cpp
@@ -0,0 +1,40 @@
+#include "bu/settings.h"
+
+#include "bu/settingsdrivertaf.h"
+
+Bu::Settings::Settings( const Bu::UtfString &sCompany,
+                const Bu::UtfString &sProduct, Bu::Settings::Driver eDriver ) :
+        sCompany( sCompany ),
+        sProduct( sProduct ),
+        pDriver( NULL )
+{
+        switch( eDriver )
+        {
+                case DriverNative:
+#if defined( WIN32 )
+#else
+                        pDriver = new Bu::SettingsDriverTaf();
+#endif
+                        break;
+
+                case DriverTaf:
+                        pDriver = new Bu::SettingsDriverTaf();
+                        break;
+
+                case DriverIni:
+                        throw Bu::ExceptionBase("Not supported");
+                        break;
+        }
+
+        pDriver->init( sCompany, sProduct );
+}
+
+Bu::Settings::~Settings()
+{
+        delete pDriver;
+}
+
+void Bu::Settings::set( const Bu::UtfString &sKey, const Bu::UtfString &sValue )
+{
+}
+
diff --git a/src/unstable/settings.h b/src/unstable/settings.h
new file mode 100644
index 0000000..0736ee5
--- /dev/null
+++ b/src/unstable/settings.h
@@ -0,0 +1,34 @@
+#ifndef BU_SETTINGS_H
+#define BU_SETTINGS_H
+
+#include "bu/utfstring.h"
+
+namespace Bu
+{
+        /**
+         * Simple access to configuration data.  Provides a consistant, cross
+         * platform interface to configuration data using native storage.
+         */
+        class Settings
+        {
+        public:
+                enum Driver
+                {
+                        DriverNative,
+                        DriverTaf,
+                        DriverIni
+                };
+                Settings( const Bu::UtfString &sCompany, const Bu::UtfString &sProduct,
+                        Driver driver=DriverNative );
+                virtual ~Settings();
+
+                void set( const Bu::UtfString &sKey, const Bu::UtfString &sValue );
+
+        private:
+                Bu::UtfString sCompany;
+                Bu::UtfString sProduct;
+                class SettingsDriver *pDriver;
+        };
+};
+
+#endif
diff --git a/src/unstable/settingsdriver.cpp b/src/unstable/settingsdriver.cpp
new file mode 100644
index 0000000..92cac77
--- /dev/null
+++ b/src/unstable/settingsdriver.cpp
@@ -0,0 +1,10 @@
+#include "bu/settingsdriver.h"
+
+Bu::SettingsDriver::SettingsDriver()
+{
+}
+
+Bu::SettingsDriver::~SettingsDriver()
+{
+}
+
diff --git a/src/unstable/settingsdriver.h b/src/unstable/settingsdriver.h
new file mode 100644
index 0000000..0a63106
--- /dev/null
+++ b/src/unstable/settingsdriver.h
@@ -0,0 +1,26 @@
+#ifndef BU_SETTINGS_DRIVER_H
+#define BU_SETTINGS_DRIVER_H
+
+#include "bu/utfstring.h"
+
+namespace Bu
+{
+        class Settings;
+
+        /**
+         * Base class for i/o interfaces for Bu::Settings.  By subclassing this you
+         * can provide custom storage for application settings.
+         */
+        class SettingsDriver
+        {
+        friend class Bu::Settings;
+        public:
+                SettingsDriver();
+                virtual ~SettingsDriver();
+
+        protected:
+                virtual void init( const Bu::UtfString &sCompany, const Bu::UtfString &sProduct )=0;
+        };
+};
+
+#endif
diff --git a/src/unstable/settingsdrivertaf.cpp b/src/unstable/settingsdrivertaf.cpp
new file mode 100644
index 0000000..164bf0b
--- /dev/null
+++ b/src/unstable/settingsdrivertaf.cpp
@@ -0,0 +1,29 @@
+#include "bu/settingsdrivertaf.h"
+
+#include "bu/file.h"
+#include "bu/taf.h"
+
+#include <stdlib.h>
+
+Bu::SettingsDriverTaf::SettingsDriverTaf() :
+        pRoot( NULL )
+{
+}
+
+Bu::SettingsDriverTaf::~SettingsDriverTaf()
+{
+}
+
+void Bu::SettingsDriverTaf::init( const Bu::UtfString &sCompany,
+                const Bu::UtfString &sProduct )
+{
+        Bu::UtfString us( getenv("HOME") );
+        us += "/";
+        us += sCompany;
+        us += "/";
+        us += sProduct;
+        Bu::File fIn( us.get(), Bu::File::Read|Bu::File::Create );
+        Bu::TafReader tr( fIn );
+        pRoot = tr.readGroup();
+}
+
diff --git a/src/unstable/settingsdrivertaf.h b/src/unstable/settingsdrivertaf.h
new file mode 100644
index 0000000..d7d751b
--- /dev/null
+++ b/src/unstable/settingsdrivertaf.h
@@ -0,0 +1,24 @@
+#ifndef BU_SETTINGS_DRIVER_TAF_H
+#define BU_SETTINGS_DRIVER_TAF_H
+
+#include "bu/settingsdriver.h"
+
+namespace Bu
+{
+        class TafGroup;
+
+        class SettingsDriverTaf : public SettingsDriver
+        {
+        public:
+                SettingsDriverTaf();
+                virtual ~SettingsDriverTaf();
+
+        protected:
+                virtual void init( const Bu::UtfString &sCompany, const Bu::UtfString &sProduct );
+
+        private:
+                class Bu::TafGroup *pRoot;
+        };
+};
+
+#endif
diff --git a/src/unstable/utfstring.cpp b/src/unstable/utfstring.cpp
index 1c6813c..9fe2d02 100644
--- a/src/unstable/utfstring.cpp
+++ b/src/unstable/utfstring.cpp
@@ -23,10 +23,25 @@ Bu::UtfString::UtfString( const Bu::String &sInput, Encoding eEnc )
         set( sInput, eEnc );
 }
 
+Bu::UtfString::UtfString( const char *sInput, Encoding eEnc )
+{
+        set( sInput, eEnc );
+}
+
 Bu::UtfString::~UtfString()
 {
 }
 
+Bu::UtfString::iterator Bu::UtfString::begin()
+{
+        return Bu::UtfString::iterator( this, 0 );
+}
+
+Bu::UtfString::const_iterator Bu::UtfString::begin() const
+{
+        return Bu::UtfString::const_iterator( this, 0 );
+}
+
 void Bu::UtfString::set( const Bu::String &sInput, Encoding eEnc )
 {
         switch( eEnc )
@@ -258,7 +273,7 @@ void Bu::UtfString::setUtf32le( const Bu::String &sInput )
         }
 }
 
-void Bu::UtfString::write( Bu::Stream &sOut, Encoding eEnc )
+void Bu::UtfString::write( Bu::Stream &sOut, Encoding eEnc ) const
 {
         switch( eEnc )
         {
@@ -306,7 +321,7 @@ void Bu::UtfString::write( Bu::Stream &sOut, Encoding eEnc )
         }
 }
 
-void Bu::UtfString::writeUtf8( Bu::Stream &sOut )
+void Bu::UtfString::writeUtf8( Bu::Stream &sOut ) const
 {
         int iPos = 0;
         while( iPos < aData.getSize() )
@@ -359,12 +374,12 @@ void Bu::UtfString::writeUtf16( Bu::Stream &sOut )
 {
 }
 */
-void Bu::UtfString::writeUtf16be( Bu::Stream &sOut )
+void Bu::UtfString::writeUtf16be( Bu::Stream &sOut ) const
 {
 #if BYTE_ORDER == BIG_ENDIAN
         uint16_t iTmp = 0xFEFF; // Byte Order Marker
         sOut.write( &iTmp, 2 );
-        for( Array<uint16_t>::iterator i = aData.begin(); i; i++ )
+        for( Array<uint16_t>::const_iterator i = aData.begin(); i; i++ )
         {
                 iTmp = *i;
                 sOut.write( &iTmp, 2 );
@@ -373,7 +388,7 @@ void Bu::UtfString::writeUtf16be( Bu::Stream &sOut )
         uint16_t iTmp = 0xFEFF; // Byte Order Marker
         iTmp = (iTmp>>8) | (iTmp<<8);
         sOut.write( &iTmp, 2 );
-        for( Array<uint16_t>::iterator i = aData.begin(); i; i++ )
+        for( Array<uint16_t>::const_iterator i = aData.begin(); i; i++ )
         {
                 iTmp = *i;
                 iTmp = (iTmp>>8) | (iTmp<<8);
@@ -382,12 +397,12 @@ void Bu::UtfString::writeUtf16be( Bu::Stream &sOut )
 #endif
 }
 
-void Bu::UtfString::writeUtf16le( Bu::Stream &sOut )
+void Bu::UtfString::writeUtf16le( Bu::Stream &sOut ) const
 {
 #if BYTE_ORDER == LITTLE_ENDIAN
         uint16_t iTmp = 0xFEFF; // Byte Order Marker
         sOut.write( &iTmp, 2 );
-        for( Array<uint16_t>::iterator i = aData.begin(); i; i++ )
+        for( Array<uint16_t>::const_iterator i = aData.begin(); i; i++ )
         {
                 iTmp = *i;
                 sOut.write( &iTmp, 2 );
@@ -396,7 +411,7 @@ void Bu::UtfString::writeUtf16le( Bu::Stream &sOut )
         uint16_t iTmp = 0xFEFF; // Byte Order Marker
         iTmp = (iTmp>>8) | (iTmp<<8);
         sOut.write( &iTmp, 2 );
-        for( Array<uint16_t>::iterator i = aData.begin(); i; i++ )
+        for( Array<uint16_t>::const_iterator i = aData.begin(); i; i++ )
         {
                 iTmp = *i;
                 iTmp = (iTmp>>8) | (iTmp<<8);
@@ -405,7 +420,7 @@ void Bu::UtfString::writeUtf16le( Bu::Stream &sOut )
 #endif
 }
 
-void Bu::UtfString::writeUtf32be( Bu::Stream &sOut )
+void Bu::UtfString::writeUtf32be( Bu::Stream &sOut ) const
 {
 #if BYTE_ORDER == BIG_ENDIAN
         uint32_t iTmp = 0xFEFF; // Byte Order Marker
@@ -430,7 +445,7 @@ void Bu::UtfString::writeUtf32be( Bu::Stream &sOut )
 #endif
 }
 
-void Bu::UtfString::writeUtf32le( Bu::Stream &sOut )
+void Bu::UtfString::writeUtf32le( Bu::Stream &sOut ) const
 {
 #if BYTE_ORDER == LITTLE_ENDIAN
         uint32_t iTmp = 0xFEFF; // Byte Order Marker
@@ -455,12 +470,12 @@ void Bu::UtfString::writeUtf32le( Bu::Stream &sOut )
 #endif
 }
 
-Bu::UtfChar Bu::UtfString::get( int iIndex )
+Bu::UtfChar Bu::UtfString::get( int iIndex ) const
 {
         return nextChar( iIndex );
 }
 
-Bu::UtfChar Bu::UtfString::nextChar( int &iIndex )
+Bu::UtfChar Bu::UtfString::nextChar( int &iIndex ) const
 {
         Bu::UtfChar i = aData[iIndex++];
         switch( i&0xFC00 )
@@ -476,14 +491,31 @@ Bu::UtfChar Bu::UtfString::nextChar( int &iIndex )
         }
 }
 
-Bu::String Bu::UtfString::get( Encoding eEnc )
+bool Bu::UtfString::operator==( const Bu::UtfString &rhs ) const
+{
+        return aData == rhs.aData;
+}
+
+Bu::UtfString &Bu::UtfString::operator+=( const Bu::UtfString &rhs )
+{
+        append( rhs );
+        return *this;
+}
+
+Bu::UtfString &Bu::UtfString::operator+=( const UtfChar &rhs )
+{
+        append( rhs );
+        return *this;
+}
+
+Bu::String Bu::UtfString::get( Encoding eEnc ) const
 {
         Bu::MemBuf mb;
         write( mb, eEnc );
         return mb.getString();
 }
 
-void Bu::UtfString::debug()
+void Bu::UtfString::debug() const
 {
         sio << "Raw Utf16: ";
         for( int i = 0; i < aData.getSize(); i++ )
@@ -552,3 +584,21 @@ void Bu::UtfString::debugUtf8( const Bu::String &sUtf8 )
         sio << sio.nl;
 }
 */
+
+template<> uint32_t Bu::__calcHashCode<Bu::UtfString>( const Bu::UtfString &k )
+{
+        uint32_t uCode = 0;
+
+        for( Bu::UtfString::const_iterator i = k.begin(); i; i++ )
+        {
+                uCode = *i + (uCode<<6) + (uCode<<16) - uCode;
+        }
+
+        return uCode;
+}
+
+template<> bool Bu::__cmpHashKeys<Bu::UtfString>(
+                const Bu::UtfString &a, const Bu::UtfString &b )
+{
+        return a == b;
+}
diff --git a/src/unstable/utfstring.h b/src/unstable/utfstring.h
index af233e8..1bd4cce 100644
--- a/src/unstable/utfstring.h
+++ b/src/unstable/utfstring.h
@@ -72,10 +72,12 @@ namespace Bu
 
                 UtfString();
                 UtfString( const Bu::String &sInput, Encoding eEnc=Utf8 );
+                UtfString( const char *sInput, Encoding eEnc=Utf8 );
                 virtual ~UtfString();
 
                 class iterator
                 {
+                friend class UtfString;
                 private:
                         iterator( UtfString *pSrc, int iCodePos ) :
                                 pSrc( pSrc ), iCodePos( iCodePos )
@@ -92,13 +94,77 @@ namespace Bu
                         {
                                 if( !pSrc )
                                         throw Bu::ExceptionBase("invalid UtfString::iterator dereferenced.");
-                                return pSrc->nextChar( iCodePos );
+                                return pSrc->get( iCodePos );
+                        }
+
+                        iterator operator++()
+                        {
+                                pSrc->nextChar( iCodePos );
+                                return *this;
+                        }
+
+                        iterator operator++( int )
+                        {
+                                pSrc->nextChar( iCodePos );
+                                return *this;
+                        }
+
+                        operator bool() const
+                        {
+                                return iCodePos < pSrc->aData.getSize();
                         }
 
                 private:
                         UtfString *pSrc;
                         int iCodePos;
                 };
+                
+                class const_iterator
+                {
+                friend class UtfString;
+                private:
+                        const_iterator( const UtfString *pSrc, int iCodePos ) :
+                                pSrc( pSrc ), iCodePos( iCodePos )
+                        {
+                        }
+
+                public:
+                        const_iterator() :
+                                pSrc( NULL ), iCodePos( 0 )
+                        {
+                        }
+
+                        UtfChar operator*()
+                        {
+                                if( !pSrc )
+                                        throw Bu::ExceptionBase("invalid UtfString::iterator dereferenced.");
+                                return pSrc->get( iCodePos );
+                        }
+
+                        const_iterator operator++()
+                        {
+                                pSrc->nextChar( iCodePos );
+                                return *this;
+                        }
+
+                        const_iterator operator++( int )
+                        {
+                                pSrc->nextChar( iCodePos );
+                                return *this;
+                        }
+
+                        operator bool() const
+                        {
+                                return iCodePos < pSrc->aData.getSize();
+                        }
+
+                private:
+                        const UtfString *pSrc;
+                        int iCodePos;
+                };
+
+                iterator begin();
+                const_iterator begin() const;
 
                 /**
                  * Append a UtfChar (A unicode code point) to the string.  This can be
@@ -122,23 +188,23 @@ namespace Bu
                  * the provided stream.  all Utf16 and Utf32 encodings will have the
                  * correct BOM (byte order marker) at the begining.
                  */
-                void write( Bu::Stream &sOut, Encoding eEnc=Utf8 );
+                void write( Bu::Stream &sOut, Encoding eEnc=Utf8 ) const;
 
                 /**
                  * This encodes the UtfString in the given encoding and returns it as
                  * a binary Bu::String.  Like write, this also includes the proper BOM
                  * at the begining.
                  */
-                Bu::String get( Encoding eEnc=Utf8 );
+                Bu::String get( Encoding eEnc=Utf8 ) const;
 
-                void debug();
+                void debug() const;
 
                 /**
                  * This may or may not stick around, given an index, this returns a
                  * codepoint, however there isn't necesarilly a 1:1 ratio between
                  * indexes and code points.
                  */
-                UtfChar get( int iIndex );
+                UtfChar get( int iIndex ) const;
 
                 /**
                  * This is what to use if you want to iterate through a section of the
@@ -147,7 +213,11 @@ namespace Bu
                  * will return the codepoint at that position and increment iIndex an
                  * appropriate amount for it to point to the next code point.
                  */
-                UtfChar nextChar( int &iIndex );
+                UtfChar nextChar( int &iIndex ) const;
+
+                bool operator==( const Bu::UtfString &rhs ) const;
+                UtfString &operator+=( const Bu::UtfString &rhs );
+                UtfString &operator+=( const UtfChar &rhs );
 
         private:
                 void append16( uint16_t i ) { aData.append( i ); }
@@ -160,17 +230,30 @@ namespace Bu
                 void setUtf32be( const Bu::String &sInput );
                 void setUtf32le( const Bu::String &sInput );
                 
-                void writeUtf8( Bu::Stream &sOut );
-                void writeUtf16be( Bu::Stream &sOut );
-                void writeUtf16le( Bu::Stream &sOut );
-                void writeUtf32be( Bu::Stream &sOut );
-                void writeUtf32le( Bu::Stream &sOut );
+                void writeUtf8( Bu::Stream &sOut ) const;
+                void writeUtf16be( Bu::Stream &sOut ) const;
+                void writeUtf16le( Bu::Stream &sOut ) const;
+                void writeUtf32be( Bu::Stream &sOut ) const;
+                void writeUtf32le( Bu::Stream &sOut ) const;
 
         private:
                 Bu::Array<uint16_t> aData;
                 int iRawLen;
                 int iCharLen;
         };
+
+        //
+        // Hash support
+        //
+        template<typename T>
+        uint32_t __calcHashCode( const T &k );
+
+        template<typename T>
+        bool __cmpHashKeys( const T &a, const T &b );
+
+        template<> uint32_t __calcHashCode<UtfString>( const UtfString &k );
+        template<> bool __cmpHashKeys<UtfString>(
+                const UtfString &a, const UtfString &b );
 };
 
 #endif