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/* <!-- copyright */
/*
* aria2 - The high speed download utility
*
* Copyright (C) 2013 Nils Maier
*
* 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.
*
* 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 Street, Fifth Floor, Boston, MA 02110-1301 USA
*
* In addition, as a special exception, the copyright holders give
* permission to link the code of portions of this program with the
* OpenSSL library under certain conditions as described in each
* individual source file, and distribute linked combinations
* including the two.
* You must obey the GNU General Public License in all respects
* for all of the code used other than OpenSSL. If you modify
* file(s) with this exception, you may extend this exception to your
* version of the file(s), but you are not obligated to do so. If you
* do not wish to do so, delete this exception statement from your
* version. If you delete this exception statement from all source
* files in the program, then also delete it here.
*/
/* copyright --> */
#include "GZipFile.h"
#include <algorithm>
#include <limits>
#include "a2io.h"
#include "util.h"
namespace aria2 {
GZipFile::GZipFile(const char* filename, const char* mode)
: fp_(nullptr), buflen_(1_k), buf_(reinterpret_cast<char*>(malloc(buflen_)))
{
auto fp =
strcmp(DEV_STDIN, filename) == 0
? stdin
:
#ifdef __MINGW32__
a2fopen(utf8ToWChar(filename).c_str(), utf8ToWChar(mode).c_str())
#else // !__MINGW32__
a2fopen(filename, mode)
#endif // !__MINGW32__
;
if (fp) {
int fd = dup(fileno(fp));
if (fd != -1) {
fp_ = gzdopen(fd, mode);
if (fp_) {
// fp_ retains fd and gzclose() will close fd as well.
#if HAVE_GZBUFFER
gzbuffer(fp_, 1 << 17);
#endif
#if HAVE_GZSETPARAMS
gzsetparams(fp_, 2, Z_DEFAULT_STRATEGY);
#endif
}
else {
::close(fd);
}
}
fclose(fp);
}
}
GZipFile::~GZipFile()
{
close();
free(buf_);
}
int GZipFile::onClose()
{
int rv = 0;
if (fp_) {
rv = gzclose(fp_);
fp_ = nullptr;
}
return rv;
}
bool GZipFile::onSupportsColor() { return false; }
bool GZipFile::isError() const
{
int rv = 0;
const char* e = gzerror(fp_, &rv);
return (e != nullptr && *e != 0) || rv != 0;
}
bool GZipFile::isEOF() const { return gzeof(fp_); }
bool GZipFile::isOpen() const { return fp_; }
size_t GZipFile::onRead(void* ptr, size_t count)
{
char* data = reinterpret_cast<char*>(ptr);
size_t read = 0;
while (count) {
size_t len = std::min(count, (size_t)std::numeric_limits<unsigned>::max());
int rv = gzread(fp_, data, len);
if (rv <= 0) {
break;
}
count -= rv;
read += rv;
data += rv;
}
return read;
}
size_t GZipFile::onWrite(const void* ptr, size_t count)
{
const char* data = reinterpret_cast<const char*>(ptr);
size_t written = 0;
while (count) {
size_t len = std::min(count, (size_t)std::numeric_limits<unsigned>::max());
int rv = gzwrite(fp_, data, len);
if (rv <= 0) {
break;
}
count -= rv;
written += rv;
data += rv;
}
return written;
}
char* GZipFile::onGets(char* s, int size) { return gzgets(fp_, s, size); }
int GZipFile::onFlush() { return gzflush(fp_, 0); }
int GZipFile::onVprintf(const char* format, va_list va)
{
ssize_t len;
for (;;) {
len = vsnprintf(buf_, buflen_, format, va);
// len does not include terminating null
if (len >= static_cast<ssize_t>(buflen_)) {
// Include terminate null
++len;
// truncated; reallocate buf and try again
while (static_cast<ssize_t>(buflen_) < len) {
buflen_ *= 2;
}
buf_ = reinterpret_cast<char*>(realloc(buf_, buflen_));
}
else if (len < 0) {
return len;
}
else {
break;
}
}
return gzwrite(fp_, buf_, len);
}
} // namespace aria2
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