latest sources commit

deps/mysqllite/strings/bchange.c

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+/* Copyright (C) 2000 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; version 2 of the License.
+
+   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 */
+
+/*  File   : bchange.c
+    Author : Michael widenius
+    Updated: 1987-03-20
+    Defines: bchange()
+
+    bchange(dst, old_length, src, new_length, tot_length)
+    replaces old_length characters at dst to new_length characters from
+    src in a buffer with tot_length bytes.
+*/
+
+#include <my_global.h>
+#include "m_string.h"
+
+void bchange(register uchar *dst, size_t old_length, register const uchar *src,
+	     size_t new_length, size_t tot_length)
+{
+  size_t rest=tot_length-old_length;
+  if (old_length < new_length)
+    bmove_upp(dst+rest+new_length,dst+tot_length,rest);
+  else
+    bmove(dst+new_length,dst+old_length,rest);
+  memcpy(dst,src,new_length);
+}