From 238244337283a7f888cf49a1e56b809c22466a63 Mon Sep 17 00:00:00 2001
From: Mike Buland <eichlan@xagasoft.com>
Date: Thu, 8 Aug 2019 09:59:52 -0700
Subject: Fixed a bug in the BlobBuilder.

Appending wasn't working correctly.
---
 src/unit/blobbuilder.unit    | 13 +++++++++++++
 src/unstable/blobbuilder.cpp | 37 +++++++++++++++++++++++++++++++++++++
 src/unstable/blobbuilder.h   |  6 +++++-
 3 files changed, 55 insertions(+), 1 deletion(-)

diff --git a/src/unit/blobbuilder.unit b/src/unit/blobbuilder.unit
index 84bf549..7f3fb93 100644
--- a/src/unit/blobbuilder.unit
+++ b/src/unit/blobbuilder.unit
@@ -17,6 +17,7 @@ suite BlobBuilder
 {
     test append
     {
+        /*
         Bu::BlobBuilder a;
         a.append("a");
         a.append("bc");
@@ -24,5 +25,17 @@ suite BlobBuilder
         Bu::println(">%1<\n\n").arg( a.getBlob() );
         a.append("abcdef");
         Bu::println(">%1<\n\n").arg( a.getBlob() );
+        */
+    }
+
+    test appendChar
+    {
+        Bu::BlobBuilder a;
+        for( int j = 0; j < 20; j++ )
+        {
+            a += 'A';
+        }
+        Bu::println("%1").arg( a.getBlob() );
+        unitTest( a.getBlob() == "AAAAAAAAAAAAAAAAAAAA" );
     }
 }
diff --git a/src/unstable/blobbuilder.cpp b/src/unstable/blobbuilder.cpp
index 497a1a1..43c0779 100644
--- a/src/unstable/blobbuilder.cpp
+++ b/src/unstable/blobbuilder.cpp
@@ -7,6 +7,7 @@
 
 #include "bu/blobbuilder.h"
 #include "bu/blob.h"
+#include "bu/exceptionbase.h"
 
 #define PAGE_SIZE 8
 
@@ -132,6 +133,7 @@ void Bu::BlobBuilderCore::append( const char *pSrc, int32_t iLength )
     if( iLength > 0 )
     {
         pLast->pNext = new Chunk( pSrc, iLength );
+        pLast = pLast->pNext;
     }
 }
 
@@ -214,6 +216,21 @@ void Bu::BlobBuilderCore::copyTo( void *pDestRaw, int32_t iLength ) const
     }
 }
 
+char Bu::BlobBuilderCore::getAt( int32_t iIndex ) const
+{
+    if( iIndex < 0 || iIndex >= iLength )
+        throw Bu::ExceptionBase("Requseted index is out of range.");
+
+    Chunk *pCur = pFirst;
+    while( iIndex >= pCur->iLength )
+    {
+        iIndex -= pCur->iLength;
+        pCur = pCur->pNext;
+    }
+
+    return pCur->pData[iIndex];
+}
+
 //////
 // BlobBuilder
 //
@@ -245,6 +262,7 @@ void Bu::BlobBuilder::set( const char *pSrc, int32_t iLength )
 
 void Bu::BlobBuilder::set( const char *pSrc )
 {
+    _hardCopy();
     set( pSrc, strlen( pSrc ) );
 }
 
@@ -262,6 +280,7 @@ void Bu::BlobBuilder::append( const char *pSrc, int32_t iLength )
 
 void Bu::BlobBuilder::append( const char *pSrc )
 {
+    _hardCopy();
     append( pSrc, strlen( pSrc ) );
 }
 
@@ -279,6 +298,7 @@ void Bu::BlobBuilder::prepend( const char *pSrc, int32_t iLength )
 
 void Bu::BlobBuilder::prepend( const char *pSrc )
 {
+    _hardCopy();
     prepend( pSrc, strlen( pSrc ) );
 }
 
@@ -297,6 +317,7 @@ void Bu::BlobBuilder::insert( int32_t iBefore, const char *pSrc,
 
 void Bu::BlobBuilder::insert( int32_t iBefore, const char *pSrc )
 {
+    _hardCopy();
     insert( iBefore, pSrc, strlen( pSrc ) );
 }
 
@@ -321,6 +342,11 @@ void Bu::BlobBuilder::copyTo( void *pDestRaw, int32_t iDestSize ) const
     core->copyTo( pDestRaw, iDestSize );
 }
 
+char Bu::BlobBuilder::operator[]( int32_t iIndex ) const
+{
+    return core->getAt( iIndex );
+}
+
 Bu::BlobBuilder &Bu::BlobBuilder::operator=( const Blob &rSrc )
 {
     set( rSrc );
@@ -333,6 +359,12 @@ Bu::BlobBuilder &Bu::BlobBuilder::operator=( const char *pSrc )
     return *this;
 }
 
+Bu::BlobBuilder &Bu::BlobBuilder::operator=( const char chr )
+{
+    set( &chr, 1 );
+    return *this;
+}
+
 Bu::BlobBuilder &Bu::BlobBuilder::operator+=( const Blob &rSrc )
 {
     append( rSrc );
@@ -345,4 +377,9 @@ Bu::BlobBuilder &Bu::BlobBuilder::operator+=( const char *pSrc )
     return *this;
 }
 
+Bu::BlobBuilder &Bu::BlobBuilder::operator+=( const char chr )
+{
+    append( &chr, 1 );
+    return *this;
+}
 
diff --git a/src/unstable/blobbuilder.h b/src/unstable/blobbuilder.h
index 744212a..c343a4f 100644
--- a/src/unstable/blobbuilder.h
+++ b/src/unstable/blobbuilder.h
@@ -53,7 +53,8 @@ namespace Bu
         void prepend( const char *pSrc, int32_t iLength );
         void insert( int32_t iBefore, const char *pSrc, int32_t iLength );
         void set( const char *pSrc, int32_t iLength );
-        void copyTo( void *pDestRaw, int32_t iLength ) const; 
+        void copyTo( void *pDestRaw, int32_t iLength ) const;
+        char getAt( int32_t iIndex ) const;
 
         Chunk *pFirst;
         Chunk *pLast;
@@ -110,11 +111,14 @@ namespace Bu
         int32_t getSize() const;
         Blob getBlob() const;
         void copyTo( void *pDestRaw, int32_t iDestSize ) const;
+        char operator[]( int32_t iIndex ) const;
 
         BlobBuilder &operator=( const Blob &rSrc );
         BlobBuilder &operator=( const char *pSrc );
+        BlobBuilder &operator=( const char chr );
         BlobBuilder &operator+=( const Blob &rSrc );
         BlobBuilder &operator+=( const char *pSrc );
+        BlobBuilder &operator+=( const char chr );
     private:
     };
 };
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