1 files changed, 91 insertions, 0 deletions
diff --git a/server-tools/instance-manager/buffer.cc b/server-tools/instance-manager/buffer.cc
new file mode 100644
index 00000000000..39e255300cf
--- /dev/null
+++ b/server-tools/instance-manager/buffer.cc
@@ -0,0 +1,91 @@
+/* Copyright (C) 2004 MySQL AB
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 2 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA */
+
+#ifdef __GNUC__
+#pragma implementation
+#endif
+
+#include "buffer.h"
+#include <m_string.h>
+
+
+/*
+  Puts the given string to the buffer.
+
+  SYNOPSYS
+    put_to_buffer()
+    start_pos         start position in the buffer
+    string            string to be put in the buffer
+    len_arg           the length of the string. This way we can avoid some
+                      strlens.
+
+  DESCRIPTION
+
+    The method puts a string into the buffer, starting from start_pos .
+    In the case when the buffer is too small it reallocs the buffer. The
+    total size of the buffer is restricted with 16.
+
+  RETURN
+    0 - ok
+    1 - The buffer came to 16Mb barrier
+*/
+
+int Buffer::put_to_buffer(char *start_pos, const char *string, uint len_arg)
+{
+  if (check_and_add(start_pos - buffer, len_arg))
+    return 1;
+
+  strnmov(start_pos, string, len_arg);
+  return 0;
+}
+
+
+/*
+  Checks whether the current buffer size is ok to put a string of the length
+  "len_arg" starting from "position" and reallocs it if no.
+
+  SYNOPSYS
+    check_and_add()
+    position          the number starting byte on the buffer to store a buffer
+    len_arg           the length of the string.
+
+  DESCRIPTION
+
+    The method checks whether it is possible to pus a string of teh "len_arg"
+    length into the buffer, starting from "position" byte. In the case when the
+    buffer is too small it reallocs the buffer. The total size of the buffer is
+    restricted with 16 Mb.
+
+  RETURN
+    0 - ok
+    1 - The buffer came to 16Mb barrier
+*/
+
+int Buffer::check_and_add(uint position, uint len_arg)
+{
+  if (position + len_arg >= MAX_BUFFER_SIZE)
+    return 1;
+
+  if (position + len_arg>= buffer_size)
+  {
+    buffer= (char *) realloc(buffer,
+                             min(MAX_BUFFER_SIZE,
+                                 max((uint) buffer_size*1.5,
+                                     position + len_arg)));
+    buffer_size= (uint) buffer_size*1.5;
+  }
+  return 0;
+}