From 26aa4bd668a2f2358b03634bce78c58085f14164 Mon Sep 17 00:00:00 2001
From: Mike Buland <eichlan@xagasoft.com>
Date: Sat, 25 May 2019 23:04:09 -0700
Subject: Started work on the SharedCore BlobBuilder.

This will contain everything that made Bu::String flexible and fast when
building, and a nightmare for multi-threaded programming.
---
 src/unstable/blob.h          |  8 +++++-
 src/unstable/blobbuilder.cpp | 63 ++++++++++++++++++++++++++++++++++++++++++++
 src/unstable/blobbuilder.h   | 53 +++++++++++++++++++++++++++++++++++++
 3 files changed, 123 insertions(+), 1 deletion(-)

diff --git a/src/unstable/blob.h b/src/unstable/blob.h
index daee5f9..b48f488 100644
--- a/src/unstable/blob.h
+++ b/src/unstable/blob.h
@@ -8,7 +8,7 @@
 #ifndef BU_BLOB_H
 #define BU_BLOB_H
 
-#include <stdint.h>
+#include "bu/config.h"
 
 namespace Bu
 {
@@ -19,6 +19,12 @@ namespace Bu
      * choice when dealing with any sequence of binary data that you don't
      * need to interpret further.
      *
+     * You may note that Blob doesn't have any append, prepend, etc. methods.
+     * This is because Blobs are designed to be more or less immutable. If you
+     * need that functionality (which is quite likely), check out
+     * Bu::BlobBuilder which offers a flexible, fast interface to build Blobs
+     * dynamically, piece at a time.
+     *
      * If you're dealing with data that contains language, such as human text,
      * then use the Bu::Text class instead.
      */
diff --git a/src/unstable/blobbuilder.cpp b/src/unstable/blobbuilder.cpp
index 73271f8..b98476b 100644
--- a/src/unstable/blobbuilder.cpp
+++ b/src/unstable/blobbuilder.cpp
@@ -5,4 +5,67 @@
  * terms of the license contained in the file LICENSE.
  */
 
+#include "blobbuilder.h"
+
+/////
+// BlobBuilderCore::Chunk
+//
+
+Bu::BlobBuilderCore::Chunk::Chunk() :
+    iFill( 0 ),
+    iLength( 0 ),
+    pData( 0 ),
+    pNext( 0 )
+{
+}
+
+Bu::BlobBuilderCore::Chunk::~Chunk()
+{
+    delete[] pData;
+    pData = 0;
+    delete pNext;
+    pNext = 0;
+}
+
+/////
+// BlobBuilderCore
+//
+
+Bu::BlobBuilderCore::BlobBuilderCore() : 
+    pFirst( 0 ),
+    pLast( 0 ),
+    iLength( 0 )
+{
+}
+
+Bu::BlobBuilderCore::BlobBuilderCore( const Bu::BlobBuilderCore &rSrc ) :
+    iLength( rSrc.iLength ),
+    pFirst( 0 ),
+    pLast( 0 )
+{
+
+}
+
+Bu::BlobBuilderCore::~BlobBuilderCore()
+{
+    delete pFirst;
+    pFirst = pLast = 0;
+}
+
+//////
+// BlobBuilder
+//
+
+Bu::BlobBuilder::BlobBuilder()
+{
+}
+
+Bu::BlobBuilder::BlobBuilder( const Bu::BlobBuilder &rSrc ) :
+    Bu::SharedCore<Bu::BlobBuilder, Bu::BlobBuilderCore>( rSrc )
+{
+}
+
+Bu::BlobBuilder::~BlobBuilder()
+{
+}
 
diff --git a/src/unstable/blobbuilder.h b/src/unstable/blobbuilder.h
index 73271f8..8cc2a24 100644
--- a/src/unstable/blobbuilder.h
+++ b/src/unstable/blobbuilder.h
@@ -5,4 +5,57 @@
  * terms of the license contained in the file LICENSE.
  */
 
+#ifndef BU_BLOB_BUILDER_H
+#define BU_BLOB_BUILDER_H
 
+#include "bu/config.h"
+#include "bu/sharedcore.h"
+
+namespace Bu
+{
+    class BlobBuilder;
+
+    class BlobBuilderCore
+    {
+    friend class BlobBuilder;
+    friend class SharedCore<BlobBuilder, BlobBuilderCore>;
+    private:
+        class Chunk
+        {
+        public:
+            Chunk();
+            ~Chunk();
+
+            int16_t iFill;
+            int16_t iLength;
+            char *pData;
+            Chunk *pNext;
+        };
+
+        BlobBuilderCore();
+        BlobBuilderCore( const BlobBuilderCore &rSrc );
+        virtual ~BlobBuilderCore();
+
+        void clear();
+
+        Chunk *pFirst;
+        Chunk *pLast;
+        int32_t iLength;
+    };
+
+    class BlobBuilder : public Bu::SharedCore<BlobBuilder, BlobBuilderCore>
+    {
+    protected:
+        using SharedCore<BlobBuilder, BlobBuilderCore>::core;
+        using SharedCore<BlobBuilder, BlobBuilderCore>::_hardCopy;
+
+    public:
+        BlobBuilder();
+        BlobBuilder( const BlobBuilder &rSrc );
+        virtual ~BlobBuilder();
+
+    private:
+    };
+};
+
+#endif
-- 
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