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// Copyright (C) 1999-2018
// Smithsonian Astrophysical Observatory, Cambridge, MA, USA
// For conditions of distribution and use, see copyright notice in "copyright"
#include "outsocket.h"
#include "util.h"
#ifndef __WIN32
#include <sys/types.h>
#include <sys/socket.h>
#include "file.h"
OutFitsSocket::OutFitsSocket(int s)
{
id_ = s;
valid_ = 1;
}
int OutFitsSocket::write(char* where, size_t size)
{
// size_t size is unsigned
long long ss = size;
size_t rr =0;
int r;
do {
r = (ss>B4KB) ? B4KB : ss;
send(id_, where+rr, r, 0);
if (r == -1) {
internalError("Fitsy++ outsocket write error");
return -1;
}
ss -= r;
rr += r;
} while (r>0 && rr<size);
return rr;
}
OutFitsSocketGZ::OutFitsSocketGZ(int s)
{
id_ = s;
stream_ = new z_stream;
buf_ = new unsigned char[B4KB];
crc_ = crc32(0L, Z_NULL, 0);
stream_->next_in = NULL;
stream_->avail_in = 0;
stream_->next_out = NULL;
stream_->avail_out = 0;
stream_->zalloc = NULL;
stream_->zfree = NULL;
stream_->opaque = NULL;
if (deflateInit2(stream_, Z_DEFAULT_COMPRESSION, Z_DEFLATED,
-MAX_WBITS, 8, Z_DEFAULT_STRATEGY) != Z_OK) {
internalError("Fitsy++ outsocket deflateInit error");
return;
}
// dump simple header
unsigned char header[10] =
{0x1f,0x8b,0x08,0x00,0x00,0x00,0x00,0x00,0x00,0x03};
send(id_, header, 10, 0);
stream_->next_out = buf_;
stream_->avail_out = B4KB;
valid_ = 1;
}
OutFitsSocketGZ::~OutFitsSocketGZ()
{
// flush any pending output
while (deflategz(Z_FINISH) == Z_OK);
// output crc/length
putlong(crc_);
putlong(stream_->total_in);
if (deflateEnd(stream_) != Z_OK)
internalError("Fitsy++ outsocket deflateEnd error");
if (stream_)
delete stream_;
if (buf_)
delete [] buf_;
}
int OutFitsSocketGZ::write(char* where, size_t size)
{
stream_->next_in = (unsigned char*)where;
stream_->avail_in = size;
if (DebugGZ)
cerr << "write " << size << endl;
while (stream_->avail_in > 0 && deflategz(Z_NO_FLUSH) == Z_OK);
// update crc
crc_ = crc32(crc_, (const Bytef *)where, size);
return size - stream_->avail_in;
}
int OutFitsSocketGZ::deflategz(int flush)
{
int result = deflate(stream_, flush);
switch (result) {
case Z_OK:
if (DebugGZ)
cerr << "deflate OK: avail_in " << stream_->avail_in
<< " avail_out " << stream_->avail_out << endl;
break;
case Z_STREAM_END:
if (DebugGZ)
cerr << "deflate STRM_END: avail_in " << stream_->avail_in
<< " avail_out " << stream_->avail_out << endl;
break;
default:
if (DebugGZ)
cerr << "deflate Error " << result << endl;
return result;
}
if (stream_->avail_out == 0 || result != Z_OK) {
int s = B4KB - stream_->avail_out;
unsigned char* d = buf_;
while (s>0) {
int r = send(id_, d, s, 0);
if (r == -1) {
internalError("Fitsy++ outsocket deflate send error");
return Z_ERRNO;
}
if (DebugGZ)
cerr << "deflate send " << r << " out of " << s << endl;
s -= r;
d += r;
}
stream_->next_out = buf_;
stream_->avail_out = B4KB;
}
return result;
}
void OutFitsSocketGZ::putlong(unsigned long l)
{
// dump in LSB order
for (int n = 0; n < 4; n++) {
unsigned char foo = (int)(l & 0xff);
send(id_, &foo, 1, 0);
l >>= 8;
}
}
#else
OutFitsSocket::OutFitsSocket(int s)
{
id_ = s;
valid_ = 0;
}
int OutFitsSocket::write(char* where, size_t size)
{
return 0;
}
OutFitsSocketGZ::OutFitsSocketGZ(int s)
{
id_ = s;
valid_ = 0;
}
OutFitsSocketGZ::~OutFitsSocketGZ() {}
int OutFitsSocketGZ::write(char* where, size_t size)
{
return 0;
}
int OutFitsSocketGZ::deflategz(int flush)
{
return 0;
}
void OutFitsSocketGZ::putlong(unsigned long l) {}
#endif
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