Remove FindSDL2 find-module, use sdl2-config.cmake instead
This requires SDL >= 2.0.4.
Since <https://bugzilla.libsdl.org/show_bug.cgi?id=2464> was fixed in
SDL 2.0.4, SDL behaves as a CMake "config-file package", even if it was
not itself built using CMake: it installs a sdl2-config.cmake file to
${libdir}/cmake/SDL2, which tells CMake where to find SDL's headers and
library, analogous to a pkg-config .pc file.
As a result, we no longer need to copy/paste a "find-module package"
to be able to find a system copy of SDL >= 2.0.4 with find_package(SDL2).
Find-module packages are now discouraged by the CMake developers, in
favour of having upstream projects behave as config-file packages.
This results in a small API change: FindSDL2 used to set SDL2_INCLUDE_DIR
and SDL2_LIBRARY, but the standard behaviour for config-file packages is
to set <name>_INCLUDE_DIRS and <name>_LIBRARIES. Use the CONFIG keyword
to make sure we search in config-file package mode, and will not find a
FindSDL2.cmake in some other directory that implements the old interface.
In addition to deleting redundant code, this avoids some assumptions in
FindSDL2 about the layout of a SDL installation. The current libsdl2-dev
package in Debian breaks those assumptions; this is considered a bug
and will hopefully be fixed soon, but it illustrates how fragile these
assumptions can be. We can be more robust against different installation
layouts by relying on SDL's own CMake integration.
When linking to a copy of CMake in a non-standard location, users can
now set the SDL2_DIR or CMAKE_PREFIX_PATH environment variable to point
to it; previously, these users would have used the SDL2DIR environment
variable. This continues to be unnecessary if using matching system-wide
installations of CMake and SDL2, for example both from Debian.
/* borrowed from https://github.com/skhaz/qt-physfs-wrapper
* TODO: add copyright header, determine license
*/
#include "FileEngine.h"
#include "hwpacksmounter.h"
const QString FileEngineHandler::scheme = "physfs:/";
FileEngine::FileEngine(const QString& filename)
: m_handle(NULL)
, m_size(0)
, m_flags(0)
, m_bufferSet(false)
, m_readWrite(false)
{
setFileName(filename);
}
FileEngine::~FileEngine()
{
close();
}
bool FileEngine::open(QIODevice::OpenMode openMode)
{
close();
if ((openMode & QIODevice::ReadWrite) == QIODevice::ReadWrite) {
m_handle = PHYSFS_openAppend(m_fileName.toUtf8().constData());
if(m_handle)
{
m_readWrite = true;
seek(0);
}
}
else if (openMode & QIODevice::WriteOnly) {
m_handle = PHYSFS_openWrite(m_fileName.toUtf8().constData());
m_flags = QAbstractFileEngine::WriteOwnerPerm | QAbstractFileEngine::WriteUserPerm | QAbstractFileEngine::FileType;
}
else if (openMode & QIODevice::ReadOnly) {
m_handle = PHYSFS_openRead(m_fileName.toUtf8().constData());
}
else if (openMode & QIODevice::Append) {
m_handle = PHYSFS_openAppend(m_fileName.toUtf8().constData());
}
else {
qWarning("[PHYSFS] Bad file open mode: %d", (int)openMode);
}
if (!m_handle) {
qWarning("%s", QString("[PHYSFS] Failed to open %1, reason: %2").arg(m_fileName).arg(FileEngineHandler::errorStr()).toLocal8Bit().constData());
return false;
}
return true;
}
bool FileEngine::close()
{
if (isOpened()) {
int result = PHYSFS_close(m_handle);
m_handle = NULL;
return result != 0;
}
return true;
}
bool FileEngine::flush()
{
return PHYSFS_flush(m_handle) != 0;
}
qint64 FileEngine::size() const
{
return m_size;
}
qint64 FileEngine::pos() const
{
return PHYSFS_tell(m_handle);
}
bool FileEngine::setSize(qint64 size)
{
if(size == 0)
{
m_size = 0;
return open(QIODevice::WriteOnly);
}
else
return false;
}
bool FileEngine::seek(qint64 pos)
{
bool ok = PHYSFS_seek(m_handle, pos) != 0;
return ok;
}
bool FileEngine::isSequential() const
{
return false;
}
bool FileEngine::remove()
{
return PHYSFS_delete(m_fileName.toUtf8().constData()) != 0;
}
bool FileEngine::mkdir(const QString &dirName, bool createParentDirectories) const
{
Q_UNUSED(createParentDirectories);
return PHYSFS_mkdir(dirName.toUtf8().constData()) != 0;
}
bool FileEngine::rmdir(const QString &dirName, bool recurseParentDirectories) const
{
Q_UNUSED(recurseParentDirectories);
return PHYSFS_delete(dirName.toUtf8().constData()) != 0;
}
bool FileEngine::caseSensitive() const
{
return true;
}
bool FileEngine::isRelativePath() const
{
return false;
}
QAbstractFileEngineIterator * FileEngine::beginEntryList(QDir::Filters filters, const QStringList &filterNames)
{
return new FileEngineIterator(filters, filterNames, entryList(filters, filterNames));
}
QStringList FileEngine::entryList(QDir::Filters filters, const QStringList &filterNames) const
{
Q_UNUSED(filters);
QString file;
QStringList result;
char **files = PHYSFS_enumerateFiles(m_fileName.toUtf8().constData());
for (char **i = files; *i != NULL; i++) {
file = QString::fromUtf8(*i);
if (filterNames.isEmpty() || QDir::match(filterNames, file)) {
result << file;
}
}
PHYSFS_freeList(files);
return result;
}
QAbstractFileEngine::FileFlags FileEngine::fileFlags(FileFlags type) const
{
return type & m_flags;
}
QString FileEngine::fileName(FileName file) const
{
switch(file)
{
case QAbstractFileEngine::AbsolutePathName:
{
QString s(PHYSFS_getWriteDir());
return s;
}
case QAbstractFileEngine::BaseName:
{
int l = m_fileName.lastIndexOf('/');
QString s = m_fileName.mid(l + 1);
return s;
}
case QAbstractFileEngine::DefaultName:
case QAbstractFileEngine::AbsoluteName:
default:
{
QString s = "physfs:/" + m_fileName;
return s;
}
}
}
QDateTime FileEngine::fileTime(FileTime time) const
{
switch (time)
{
case QAbstractFileEngine::ModificationTime:
default:
return m_date;
break;
};
}
void FileEngine::setFileName(const QString &file)
{
if(file.startsWith(FileEngineHandler::scheme))
m_fileName = file.mid(FileEngineHandler::scheme.size());
else
m_fileName = file;
PHYSFS_Stat stat;
if (PHYSFS_stat(m_fileName.toUtf8().constData(), &stat) != 0) {
m_size = stat.filesize;
m_date = QDateTime::fromTime_t(stat.modtime);
// m_flags |= QAbstractFileEngine::WriteOwnerPerm;
m_flags |= QAbstractFileEngine::ReadOwnerPerm;
m_flags |= QAbstractFileEngine::ReadUserPerm;
m_flags |= QAbstractFileEngine::ExistsFlag;
m_flags |= QAbstractFileEngine::LocalDiskFlag;
switch (stat.filetype)
{
case PHYSFS_FILETYPE_REGULAR:
m_flags |= QAbstractFileEngine::FileType;
break;
case PHYSFS_FILETYPE_DIRECTORY:
m_flags |= QAbstractFileEngine::DirectoryType;
break;
case PHYSFS_FILETYPE_SYMLINK:
m_flags |= QAbstractFileEngine::LinkType;
break;
default: ;
}
}
}
bool FileEngine::atEnd() const
{
return PHYSFS_eof(m_handle) != 0;
}
qint64 FileEngine::read(char *data, qint64 maxlen)
{
if(m_readWrite)
{
if(pos() == 0)
open(QIODevice::ReadOnly);
else
return -1;
}
qint64 len = PHYSFS_readBytes(m_handle, data, maxlen);
return len;
}
qint64 FileEngine::readLine(char *data, qint64 maxlen)
{
if(!m_bufferSet)
{
PHYSFS_setBuffer(m_handle, 4096);
m_bufferSet = true;
}
qint64 bytesRead = 0;
while(PHYSFS_readBytes(m_handle, data, 1)
&& maxlen
&& (*data == '\n'))
{
++data;
--maxlen;
++bytesRead;
}
return bytesRead;
}
qint64 FileEngine::write(const char *data, qint64 len)
{
return PHYSFS_writeBytes(m_handle, data, len);
}
bool FileEngine::isOpened() const
{
return m_handle != NULL;
}
QFile::FileError FileEngine::error() const
{
return QFile::UnspecifiedError;
}
QString FileEngine::errorString() const
{
#if PHYSFS_VER_MAJOR >= 3
return PHYSFS_getErrorByCode(PHYSFS_getLastErrorCode());
#else
return PHYSFS_getLastError();
#endif
}
bool FileEngine::supportsExtension(Extension extension) const
{
return
(extension == QAbstractFileEngine::AtEndExtension)
|| (extension == QAbstractFileEngine::FastReadLineExtension)
;
}
FileEngineHandler::FileEngineHandler(char *argv0)
{
if (!PHYSFS_init(argv0))
{
qCritical("PHYSFS initialization failed");
}
qDebug("%s", QString("[PHYSFS] Init: %1").arg(errorStr()).toLocal8Bit().constData());
}
FileEngineHandler::~FileEngineHandler()
{
PHYSFS_deinit();
}
QAbstractFileEngine* FileEngineHandler::create(const QString &filename) const
{
if (filename.startsWith(scheme))
return new FileEngine(filename);
else
return NULL;
}
void FileEngineHandler::mount(const QString &path)
{
PHYSFS_mount(path.toUtf8().constData(), NULL, 0);
qDebug("%s", QString("[PHYSFS] Mounting '%1' to '/': %2").arg(path).arg(errorStr()).toLocal8Bit().constData());
}
void FileEngineHandler::mount(const QString & path, const QString & mountPoint)
{
PHYSFS_mount(path.toUtf8().constData(), mountPoint.toUtf8().constData(), 0);
qDebug("%s", QString("[PHYSFS] Mounting '%1' to '%2': %3").arg(path).arg(mountPoint).arg(errorStr()).toLocal8Bit().data());
}
void FileEngineHandler::setWriteDir(const QString &path)
{
PHYSFS_setWriteDir(path.toUtf8().constData());
qDebug("%s", QString("[PHYSFS] Setting write dir to '%1': %2").arg(path).arg(errorStr()).toLocal8Bit().data());
}
void FileEngineHandler::mountPacks()
{
hedgewarsMountPackages();
}
QString FileEngineHandler::errorStr()
{
QString s;
#if PHYSFS_VER_MAJOR >= 3
s = QString::fromUtf8(PHYSFS_getErrorByCode(PHYSFS_getLastErrorCode()));
#else
s = QString::fromUtf8(PHYSFS_getLastError());
#endif
return s.isEmpty() ? "ok" : s;
}
FileEngineIterator::FileEngineIterator(QDir::Filters filters, const QStringList &nameFilters, const QStringList &entries)
: QAbstractFileEngineIterator(filters, nameFilters)
{
m_entries = entries;
/* heck.. docs are unclear on this
* QDirIterator puts iterator before first entry
* but QAbstractFileEngineIterator example puts iterator on first entry
* though QDirIterator approach seems to be the right one
*/
m_index = -1;
}
bool FileEngineIterator::hasNext() const
{
return m_index < m_entries.size() - 1;
}
QString FileEngineIterator::next()
{
if (!hasNext())
return QString();
++m_index;
return currentFilePath();
}
QString FileEngineIterator::currentFileName() const
{
return m_entries.at(m_index);
}