gecko/xpcom/tests/ShowAlignments.cpp

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/* vim: set shiftwidth=2 tabstop=8 autoindent cindent expandtab: */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is ShowAlignments.cpp.
*
* The Initial Developer of the Original Code is the Mozilla Foundation.
* Portions created by the Initial Developer are Copyright (C) 2010
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* L. David Baron <dbaron@dbaron.org>, Mozilla Corporation (original author)
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
/* show the size and alignment requirements of various types */
#include "nsMemory.h"
#include <stdio.h>
struct S {
double d;
char c;
short s;
};
int main()
{
static const char str[] =
"Type %s has size %u and alignment requirement %u\n";
#define SHOW_TYPE(t_) \
printf(str, #t_, unsigned(sizeof(t_)), unsigned(NS_ALIGNMENT_OF(t_)))
SHOW_TYPE(char);
SHOW_TYPE(unsigned short);
SHOW_TYPE(int);
SHOW_TYPE(long);
SHOW_TYPE(PRUint8);
SHOW_TYPE(PRInt16);
SHOW_TYPE(PRUint32);
SHOW_TYPE(PRFloat64);
SHOW_TYPE(void*);
SHOW_TYPE(double);
SHOW_TYPE(short[7]);
SHOW_TYPE(S);
SHOW_TYPE(double S::*);
return 0;
}