uint64 ZipStream::size() const
{
ZZIP_STAT zs;
int ret = zzip_file_stat(handle, &zs);
assert( ret != -1 );
return zs.st_size;
}
long
ZipSource::GetSize() const
{
ZZIP_STAT st;
return zzip_file_stat(file, &st) >= 0
? (long)st.st_size
: -1l;
}
/** => zzip_dir_stat
* This function will obtain information about a opened file which may be
* either real/zipped. The file is supposed to be open (otherwise -1 is
* returned). The st_size stat-member contains the uncompressed size.
* The optional d_name is never set here. For a real file, we do set the
* d_csize := st_size and d_compr := 0 for meaningful defaults.
*/
int zzip_fstat (ZZIP_FILE* file, ZZIP_STAT* zs)
{
if (ZZIP_file_real(file))
{
struct stat st;
if (fstat (file->fd, &st) < 0) return -1;
zs->st_size = st.st_size;
zs->d_csize = st.st_size;
zs->d_compr = 0;
return 0;
}else{
return zzip_file_stat (file, zs);
}
}
/** => zzip_dir_stat
* This function will obtain information about a opened file which may be
* either real/zipped. The file is supposed to be open (otherwise -1 is
* returned). The st_size stat-member contains the uncompressed size.
* The optional d_name is never set here. For a real file, we do set the
* d_csize := st_size and d_compr := 0 for meaningful defaults.
*/
int zzip_fstat (ZZIP_FILE* file, ZZIP_STAT* zs)
{
if (ZZIP_file_real(file))
{
// JMW TODO!
#if (WINDOWSPC>0)
struct stat st;
if (fstat (file->fd, &st) < 0) return -1;
zs->st_size = st.st_size;
zs->d_csize = st.st_size;
zs->d_compr = 0;
return 0;
#else
return 0;
#endif
}else{
return zzip_file_stat (file, zs);
}
}
/** Creates a buffer of all the data in the SRTM file. The uncompressed version is used if available.
*
* \returns The length of the side of the data (e.g. 1201 or 3601)
* \note The buffer returned is owned by the caller of this function and _must_ be freed after usage.
*/
int SrtmZipFile::getData(QString filename, qint16 **buffer)
{
*buffer = 0;
QFileInfo fi(filename);
QString uncompressedFile = fi.path()+'/'+fi.completeBaseName();
int size = 0;
if (QFileInfo(uncompressedFile).exists()) {
QFile file(uncompressedFile);
if (!file.open(QIODevice::ReadOnly)) {
qCritical() << "ZIP(Uncompressed): Could not open file" << uncompressedFile << file.errorString();
return 0;
}
size = sqrt(file.size()/2);
if (size*size*2 != file.size()) {
qCritical() << "ZIP(Uncompressed): Invalid data: Not a square!";
}
*buffer = new qint16[file.size()/2];
if (!*buffer) {
qCritical() << "ZIP(Uncompressed): Could not allocate buffer.";
return 0;
}
if (file.read((char *)*buffer, file.size()) != file.size()) {
qCritical() << "ZIP(Uncompressed): Could not read all bytes.";
}
file.close();
} else {
ZZIP_DIR* dir = zzip_dir_open(filename.toAscii(), 0);
if (!dir) {
qCritical() << "ZIP: Could not open zip file" << filename;
return 0;
}
ZZIP_FILE* fp = zzip_file_open(dir, fi.completeBaseName().toAscii(), 0);
if (!fp) {
qCritical() << "ZIP: Could not find" << fi.completeBaseName() << "in" << filename;
return 0;
}
ZZIP_STAT stat;
if (zzip_file_stat(fp, &stat) == -1) {
qCritical() << "ZIP: Could not get info about" << uncompressedFile;
return 0;
}
size = sqrt(stat.st_size/2);
if (size*size*2 != stat.st_size) {
qCritical() << "ZIP: Invalid data: Not a square!";
}
*buffer = new qint16[stat.st_size/2];
if (zzip_file_read(fp, *buffer, stat.st_size) != stat.st_size) {
qCritical() << "ZIP: Could not read all bytes.";
delete *buffer;
*buffer = 0;
return 0;
}
//store uncompressed content on disk?
if (false) {
QFile file(uncompressedFile);
if (!file.open(QIODevice::WriteOnly | QIODevice::Truncate)) {
qCritical() << "ZIP(Writing): Could not open file" << uncompressedFile << file.errorString();
} else {
file.write((char *)*buffer, stat.st_size);
file.close();
}
}
zzip_file_close(fp);
zzip_dir_close(dir);
}
return size;
}
