Initial import of the CDE 2.1.30 sources from the Open Group.

cde/programs/dtinfo/dtinfogen/infolib/etc/FlexBuffer.C

@@ -0,0 +1,73 @@
+/* $XConsortium: FlexBuffer.cc /main/2 1996/07/18 16:13:49 drk $ */
+
+#include <iostream.h>
+#include <memory.h>
+#include <string.h>
+#include "FlexBuffer.h"
+
+//---------------------------------------------------------
+FlexBuffer::FlexBuffer()
+{
+  HeadPtr = 0;
+  maxSize = pos = 0;
+}
+
+//---------------------------------------------------------
+//FlexBuffer::~FlexBuffer()
+//{
+//  delete HeadPtr;
+//}
+
+//---------------------------------------------------------
+void
+FlexBuffer::grow(size_t needed)
+{
+  if(needed + 1 > maxSize){
+    char *born = new char[maxSize = needed * 3 / 2 + 10];
+    
+    if(pos){
+      memcpy(born, HeadPtr, pos);
+      delete [] HeadPtr;
+    }
+
+    HeadPtr = born;
+  }
+}
+
+//---------------------------------------------------------
+void
+FlexBuffer::write(const char *d, size_t n)
+{
+  grow(pos + n);
+  memcpy(HeadPtr + pos, d, n);
+  pos += n;
+}
+
+//---------------------------------------------------------
+void
+FlexBuffer::writeStr(const char *str )
+{
+  int n = strlen(str);
+  grow( pos + n );
+  memcpy ( HeadPtr + pos, str, n );
+  pos += n;
+}
+
+//---------------------------------------------------------
+FlexBuffer &
+FlexBuffer::operator+( FlexBuffer & fb )
+{
+
+  grow( pos + fb.GetSize() );
+  memcpy(HeadPtr + pos , fb.HeadPtr, fb.GetSize() );
+  pos += fb.GetSize();
+  return ( *this );
+}
+
+//---------------------------------------------------------
+ostream &
+operator<< ( ostream &os, FlexBuffer &fb )
+{
+  os << fb.GetBuffer();
+  return os;
+}