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/* -*- mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; -*-
* vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
*
* Copyright (C) 2008 Sun Microsystems
*
* 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "config.h"
#include "drizzled/plugin/error_message.h"
#include "drizzled/gettext.h"
#include <cstdio>
#include <algorithm>
#include <vector>
using namespace std;
namespace drizzled
{
vector<plugin::ErrorMessage *> all_errmsg_handler;
bool errmsg_has= false;
bool plugin::ErrorMessage::addPlugin(plugin::ErrorMessage *handler)
{
all_errmsg_handler.push_back(handler);
errmsg_has= true;
return false;
}
void plugin::ErrorMessage::removePlugin(plugin::ErrorMessage *handler)
{
all_errmsg_handler.erase(find(all_errmsg_handler.begin(),
all_errmsg_handler.end(), handler));
}
class Print : public unary_function<plugin::ErrorMessage *, bool>
{
Session *session;
int priority;
const char *format;
va_list ap;
public:
Print(Session *session_arg, int priority_arg,
const char *format_arg, va_list ap_arg)
: unary_function<plugin::ErrorMessage *, bool>(), session(session_arg),
priority(priority_arg), format(format_arg)
{
va_copy(ap, ap_arg);
}
~Print() { va_end(ap); }
inline result_type operator()(argument_type handler)
{
va_list handler_ap;
va_copy(handler_ap, ap);
if (handler->errmsg(session, priority, format, handler_ap))
{
/* we're doing the errmsg plugin api,
so we can't trust the errmsg api to emit our error messages
so we will emit error messages to stderr */
/* TRANSLATORS: The leading word "errmsg" is the name
of the plugin api, and so should not be translated. */
fprintf(stderr,
_("errmsg plugin '%s' errmsg() failed"),
handler->getName().c_str());
va_end(handler_ap);
return true;
}
va_end(handler_ap);
return false;
}
};
bool plugin::ErrorMessage::vprintf(Session *session, int priority,
char const *format, va_list ap)
{
/* check to see if any errmsg plugin has been loaded
if not, just fall back to emitting the message to stderr */
if (!errmsg_has)
{
/* if it turns out that the vfprintf doesnt do one single write
(single writes are atomic), then this needs to be rewritten to
vsprintf into a char buffer, and then write() that char buffer
to stderr */
vfprintf(stderr, format, ap);
return false;
}
/* Use find_if instead of foreach so that we can collect return codes */
vector<plugin::ErrorMessage *>::iterator iter=
find_if(all_errmsg_handler.begin(), all_errmsg_handler.end(),
Print(session, priority, format, ap));
/* If iter is == end() here, that means that all of the plugins returned
* false, which in this case means they all succeeded. Since we want to
* return false on success, we return the value of the two being !=
*/
return iter != all_errmsg_handler.end();
}
} /* namespace drizzled */
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