annotate base/Debug.cpp @ 1008:d9e0e59a1581

When using an aggregate model to pass data to a transform, zero-pad the shorter input to the duration of the longer rather than truncating the longer. (This is better behaviour for e.g. MATCH, and in any case the code was previously truncating incorrectly and ending up with garbage data at the end.)

/* -*- c-basic-offset: 4 indent-tabs-mode: nil -*-  vi:set ts=8 sts=4 sw=4: */

/*
    Sonic Visualiser
    An audio file viewer and annotation editor.
    Centre for Digital Music, Queen Mary, University of London.
    This file copyright 2010-2011 Chris Cannam and QMUL.
    
    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; either version 2 of the
    License, or (at your option) any later version.  See the file
    COPYING included with this distribution for more information.
*/

#include "Debug.h"
#include "ResourceFinder.h"

#include <QString>
#include <QUrl>
#include <QMutex>
#include <QMutexLocker>
#include <QFile>
#include <QDir>
#include <QCoreApplication>
#include <QDateTime>
#include <QThreadStorage>

#include <cstdio>

static QThreadStorage<QDebug *> debugs;
static QMutex mutex;
static char *prefix = 0;

QDebug &
getSVDebug()
{
    mutex.lock();

    QDebug *debug = 0;

    QString pfx = ResourceFinder().getUserResourcePrefix();
    QDir logdir(QString("%1/%2").arg(pfx).arg("log"));

    if (!prefix) {
        prefix = strdup(QString("[%1]")
                        .arg(QCoreApplication::applicationPid())
                        .toLatin1().data());
        //!!! what to do if mkpath fails?
	if (!logdir.exists()) logdir.mkpath(logdir.path());
    }

    if (!debugs.hasLocalData()) {
        QFile *logFile = new QFile(logdir.path() + "/sv-debug.log");
        if (logFile->open(QIODevice::WriteOnly | QIODevice::Append)) {
            QDebug(QtDebugMsg) << (const char *)prefix
                               << "Opened debug log file "
                               << logFile->fileName();
            debug = new QDebug(logFile);
        } else {
            QDebug(QtWarningMsg) << (const char *)prefix
                                 << "Failed to open debug log file "
                                 << logFile->fileName()
                                 << " for writing, using console debug instead";
            delete logFile;
            logFile = 0;
            debug = new QDebug(QtDebugMsg);
        }
        debugs.setLocalData(debug);
        *debug << endl << (const char *)prefix << "Log started at "
               << QDateTime::currentDateTime().toString();
    } else {
        debug = debugs.localData();
    }

    mutex.unlock();

    QDebug &dref = *debug;
    dref << endl << (const char *)prefix;

    return dref;
}

QDebug &
operator<<(QDebug &dbg, const std::string &s)
{
    dbg << QString::fromUtf8(s.c_str());
    return dbg;
}

std::ostream &
operator<<(std::ostream &target, const QString &str)
{
    return target << str.toStdString();
}

std::ostream &
operator<<(std::ostream &target, const QUrl &u)
{
    return target << "<" << u.toString().toStdString() << ">";
}