latest sources commit

deps/mysqllite/strings/strxnmov.c

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+/* Copyright (C) 2002 MySQL AB
+   
+   This library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Library General Public
+   License as published by the Free Software Foundation; version 2
+   of the License.
+   
+   This library 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
+   Library General Public License for more details.
+   
+   You should have received a copy of the GNU Library General Public
+   License along with this library; if not, write to the Free
+   Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
+   MA 02111-1307, USA */
+
+/*  File   : strxnmov.c
+    Author : Richard A. O'Keefe.
+    Updated: 2 June 1984
+    Defines: strxnmov()
+
+    strxnmov(dst, len, src1, ..., srcn, NullS)
+    moves the first len characters of the concatenation of src1,...,srcn
+    to dst and add a closing NUL character.
+    It is just like strnmov except that it concatenates multiple sources.
+    Beware: the last argument should be the null character pointer.
+    Take VERY great care not to omit it!  Also be careful to use NullS
+    and NOT to use 0, as on some machines 0 is not the same size as a
+    character pointer, or not the same bit pattern as NullS.
+
+    NOTE
+      strxnmov is like strnmov in that it moves up to len
+      characters; dst will be padded on the right with one '\0' character.
+      if total-string-length >= length then dst[length] will be set to \0
+*/
+
+#include <my_global.h>
+#include "m_string.h"
+#include <stdarg.h>
+
+char *strxnmov(char *dst, size_t len, const char *src, ...)
+{
+  va_list pvar;
+  char *end_of_dst=dst+len;
+
+  va_start(pvar,src);
+  while (src != NullS)
+  {
+    do
+    {
+      if (dst == end_of_dst)
+	goto end;
+    }
+    while ((*dst++ = *src++));
+    dst--;
+    src = va_arg(pvar, char *);
+  }
+end:
+  *dst=0;
+  va_end(pvar);
+  return dst;
+}