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Merge FileFileName::Private::checksum() into FileFileName::checksum().

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git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@26615 a592a061-630c-0410-9148-cb99ea01b6c8
This commit is contained in:
Abdelrazak Younes 2008-09-29 09:35:13 +00:00
parent 0442417d22
commit 56a60dce0a
1 changed files with 82 additions and 85 deletions
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167
src/support/FileName.cpp
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@ -121,85 +121,10 @@ struct FileName::Private
#endif
}
unsigned long checksum();
///
QFileInfo fi;
};
unsigned long FileName::Private::checksum()
{
#if QT_VERSION >= 0x999999
// First version of checksum uses Qt4.4 mmap support.
// FIXME: This code is not ready with Qt4.4.2,
// see http://bugzilla.lyx.org/show_bug.cgi?id=5293
// FIXME: should we check if the MapExtension extension is supported?
// see QAbstractFileEngine::supportsExtension() and
// QAbstractFileEngine::MapExtension)
QFile qf(fi.filePath());
if (!qf.open(QIODevice::ReadOnly))
return 0;
qint64 size = fi.size();
uchar * ubeg = qf.map(0, size);
uchar * uend = ubeg + size;
boost::crc_32_type ucrc;
ucrc.process_block(ubeg, uend);
qf.unmap(ubeg);
qf.close();
return ucrc.checksum();
#endif
//FIXME: This doesn't work on Windows for non ascii file names. Provided that
// Windows package uses Qt4.4, this isn't a problem.
QByteArray const encoded = QFile::encodeName(fi.absoluteFilePath());
char const * file = encoded.constData();
#ifdef SUM_WITH_MMAP
//LYXERR(Debug::FILES, "using mmap (lightning fast)");
int fd = open(file, O_RDONLY);
if (!fd)
return 0;
struct stat info;
fstat(fd, &info);
void * mm = mmap(0, info.st_size, PROT_READ,
MAP_PRIVATE, fd, 0);
// Some platforms have the wrong type for MAP_FAILED (compaq cxx).
if (mm == reinterpret_cast<void*>(MAP_FAILED)) {
close(fd);
return 0;
}
char * beg = static_cast<char*>(mm);
char * end = beg + info.st_size;
boost::crc_32_type crc;
crc.process_block(beg, end);
unsigned long result = crc.checksum();
munmap(mm, info.st_size);
close(fd);
return result;
#else // no SUM_WITH_MMAP
//LYXERR(Debug::FILES, "lyx::sum() using istreambuf_iterator (fast)");
ifstream ifs(file, ios_base::in | ios_base::binary);
if (!ifs)
return 0;
istreambuf_iterator<char> beg(ifs);
istreambuf_iterator<char> end;
boost::crc_32_type crc;
crc = for_each(beg, end, crc);
return crc.checksum();
#endif // SUM_WITH_MMAP
}
/////////////////////////////////////////////////////////////////////
//
// FileName
@ -330,6 +255,8 @@ bool FileName::changePermission(unsigned long int mode) const
string FileName::toFilesystemEncoding() const
{
// FIXME: This doesn't work on Windows for non ascii file names with Qt < 4.4.
// Provided that Windows package uses Qt4.4, this isn't a problem.
QByteArray const encoded = QFile::encodeName(d->fi.absoluteFilePath());
return string(encoded.begin(), encoded.end());
}
@ -521,24 +448,94 @@ bool FileName::chdir() const
unsigned long FileName::checksum() const
{
unsigned long result = 0;
if (!exists()) {
//LYXERR0("File \"" << absFilename() << "\" does not exist!");
return 0;
return result;
}
// a directory may be passed here so we need to test it. (bug 3622)
if (isDirectory()) {
LYXERR0('"' << absFilename() << "\" is a directory!");
return 0;
return result;
}
if (!lyxerr.debugging(Debug::FILES))
return d->checksum();
QTime t;
t.start();
unsigned long r = d->checksum();
lyxerr << "Checksumming \"" << absFilename() << "\" "
<< r << " lasted " << t.elapsed() << " ms." << endl;
return r;
// This is used in the debug output at the end of the method.
static QTime t;
if (lyxerr.debugging(Debug::FILES))
t.restart();
#if QT_VERSION >= 0x999999
// First version of checksum uses Qt4.4 mmap support.
// FIXME: This code is not ready with Qt4.4.2,
// see http://bugzilla.lyx.org/show_bug.cgi?id=5293
// FIXME: should we check if the MapExtension extension is supported?
// see QAbstractFileEngine::supportsExtension() and
// QAbstractFileEngine::MapExtension)
QFile qf(fi.filePath());
if (!qf.open(QIODevice::ReadOnly))
return result;
qint64 size = fi.size();
uchar * ubeg = qf.map(0, size);
uchar * uend = ubeg + size;
boost::crc_32_type ucrc;
ucrc.process_block(ubeg, uend);
qf.unmap(ubeg);
qf.close();
result = ucrc.checksum();
#else // QT_VERSION
string const encoded = toFilesystemEncoding();
char const * file = encoded.c_str();
#ifdef SUM_WITH_MMAP
//LYXERR(Debug::FILES, "using mmap (lightning fast)");
int fd = open(file, O_RDONLY);
if (!fd)
return result;
struct stat info;
fstat(fd, &info);
void * mm = mmap(0, info.st_size, PROT_READ,
MAP_PRIVATE, fd, 0);
// Some platforms have the wrong type for MAP_FAILED (compaq cxx).
if (mm == reinterpret_cast<void*>(MAP_FAILED)) {
close(fd);
return result;
}
char * beg = static_cast<char*>(mm);
char * end = beg + info.st_size;
boost::crc_32_type crc;
crc.process_block(beg, end);
unsigned long result = crc.checksum();
munmap(mm, info.st_size);
close(fd);
#else // no SUM_WITH_MMAP
//LYXERR(Debug::FILES, "lyx::sum() using istreambuf_iterator (fast)");
ifstream ifs(file, ios_base::in | ios_base::binary);
if (!ifs)
return result;
istreambuf_iterator<char> beg(ifs);
istreambuf_iterator<char> end;
boost::crc_32_type crc;
crc = for_each(beg, end, crc);
result = crc.checksum();
#endif // SUM_WITH_MMAP
#endif // QT_VERSION
LYXERR(Debug::FILES, "Checksumming \"" << absFilename() << "\" "
<< result << " lasted " << t.elapsed() << " ms.");
return result;
}