First Commit

For Azeroth!

dep/mysqllite/strings/strmake.c

@@ -0,0 +1,54 @@
+/* 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   : strmake.c
+    Author : Michael Widenius
+    Updated: 20 Jul 1984
+    Defines: strmake()
+
+    strmake(dst,src,length) moves length characters, or until end, of src to
+    dst and appends a closing NUL to dst.
+    Note that if strlen(src) >= length then dst[length] will be set to \0
+    strmake() returns pointer to closing null
+*/
+
+#include <my_global.h>
+#include "m_string.h"
+
+char *strmake(register char *dst, register const char *src, size_t length)
+{
+#ifdef EXTRA_DEBUG
+  /*
+    'length' is the maximum length of the string; the buffer needs
+    to be one character larger to accomodate the terminating '\0'.
+    This is easy to get wrong, so we make sure we write to the
+    entire length of the buffer to identify incorrect buffer-sizes.
+    We only initialise the "unused" part of the buffer here, a) for
+    efficiency, and b) because dst==src is allowed, so initialising
+    the entire buffer would overwrite the source-string. Also, we
+    write a character rather than '\0' as this makes spotting these
+    problems in the results easier.
+  */
+  uint n= 0;
+  while (n < length && src[n++]);
+  memset(dst + n, (int) 'Z', length - n + 1);
+#endif
+
+  while (length--)
+    if (! (*dst++ = *src++))
+      return dst-1;
+  *dst=0;
+  return dst;
+}