int GZDecompress(Stream& out, Stream& in, int size, Gate2<int, int> progress)
{
byte buffer[10];
if(!in.GetAll(buffer, 10) || buffer[0] != GZ_MAGIC1 || buffer[1] != GZ_MAGIC2) {
out.SetError();
return -1;
}
int flags = buffer[3];
if(buffer[2] != Z_DEFLATED || (flags & RESERVED) != 0)
return false;
size -= 10;
if(flags & EXTRA_FIELD) {
int len = in.Get16le();
in.SeekCur(len);
size -= len;
}
if(flags & ORIG_NAME)
size -= sSkipZ(in);
if(flags & COMMENT)
size -= sSkipZ(in);
if(flags & HEAD_CRC) {
in.Get16le();
size -= 2;
}
if(in.IsEof() || size < 0) {
out.SetError();
return -1;
}
dword crc;
int sz = ZDecompress(out, in, size, progress, true, &crc);
return sz < 0 || in.Get32le() != (int)crc || in.Get32le() != sz ? -1 : sz;
}
String ZDecompress(const void *data, int len, Gate2<int, int> progress)
{
StringStream out;
MemReadStream in(data, len);
ZDecompress(out, in, progress);
return out;
}
int StaticCompressor::decompressBuffer(unsigned char *plainBuffer,
const unsigned int plainSize,
const unsigned char *compressedBuffer,
const unsigned int compressedSize)
{
#ifdef TEST
*logofs << "StaticCompressor: Called for buffer at "
<< (void *) plainBuffer << ".\n"
<< logofs_flush;
#endif
unsigned int checkSize = plainSize;
int result = ZDecompress(&decompressionStream_, plainBuffer, &checkSize,
compressedBuffer, compressedSize);
if (result != Z_OK)
{
#ifdef PANIC
*logofs << "StaticCompressor: PANIC! Failure decompressing buffer. "
<< "Error is '" << zError(result) << "'.\n"
<< logofs_flush;
#endif
return -1;
}
if (plainSize != checkSize)
{
#ifdef PANIC
*logofs << "StaticCompressor: PANIC! Expected decompressed size was "
<< plainSize << " while it is " << checkSize
<< ".\n" << logofs_flush;
#endif
cerr << "Error" << ": Expected decompressed size was "
<< plainSize << " while it is " << checkSize
<< ".\n";
return -1;
}
#ifdef TEST
*logofs << "StaticCompressor: Decompressed buffer from "
<< compressedSize << " to " << plainSize
<< " bytes.\n" << logofs_flush;
#endif
return 1;
}
NAMESPACE_UPP
static Topic ReadTopic(const char *text)
{
Topic topic;
CParser p(text);
try {
if(p.Id("topic")) {
topic.title = p.ReadString();
p.Char(';');
topic.text = p.GetPtr();
return topic;
}
while(!p.IsEof()) {
if(p.Id("TITLE")) {
p.PassChar('(');
topic.title = p.ReadString();
p.PassChar(')');
} else if(p.Id("REF")) {
p.PassChar('(');
p.ReadString();
p.PassChar(')');
} else if(p.Id("TOPIC_TEXT")) {
p.PassChar('(');
topic.text << p.ReadString();
p.PassChar(')');
} else if(p.Id("COMPRESSED")) {
StringBuffer b;
b.Reserve(1024);
while(p.IsInt()) {
b.Cat(p.ReadInt());
p.PassChar(',');
}
topic.text = ZDecompress(~b, b.GetLength());
} else {
topic.text << p.GetPtr();
break;
}
}
}
catch(CParser::Error e) {
topic.text = String::GetVoid();
topic.title = e;
}
return topic;
}
static String sZet(FileIn& in, int offset, int len)
{
in.Seek(offset);
return ZDecompress(in.Get(len));
}
int StaticCompressor::decompressBuffer(unsigned char *plainBuffer,
unsigned int plainSize,
const unsigned char *&compressedBuffer,
unsigned int &compressedSize,
DecodeBuffer &decodeBuffer)
{
#ifdef DEBUG
*logofs << "StaticCompressor: Called for buffer at "
<< (void *) plainBuffer << ".\n"
<< logofs_flush;
#endif
unsigned int value;
decodeBuffer.decodeBoolValue(value);
if (value == 0)
{
memcpy(plainBuffer,
decodeBuffer.decodeMemory(plainSize),
plainSize);
return 0;
}
unsigned int checkSize = plainSize;
decodeBuffer.decodeValue(value, 32, 14);
compressedSize = value;
decodeBuffer.decodeValue(value, 32, 14);
checkSize = value;
//
// If caller needs the original compressed
// data it must copy this to its own buffer
// before using any further decode function.
//
compressedBuffer = decodeBuffer.decodeMemory(compressedSize);
int result = ZDecompress(&decompressionStream_, plainBuffer, &checkSize,
compressedBuffer, compressedSize);
if (result != Z_OK)
{
#ifdef PANIC
*logofs << "StaticCompressor: PANIC! Failure decompressing buffer. "
<< "Error is '" << zError(result) << "'.\n"
<< logofs_flush;
#endif
cerr << "Error" << ": Failure decompressing buffer. "
<< "Error is '" << zError(result) << "'.\n";
return -1;
}
else if (plainSize != checkSize)
{
#ifdef PANIC
*logofs << "StaticCompressor: PANIC! Expected decompressed size was "
<< plainSize << " while it is " << checkSize
<< ".\n" << logofs_flush;
#endif
cerr << "Error" << ": Expected decompressed size was "
<< plainSize << " while it is " << checkSize
<< ".\n";
return -1;
}
return 1;
}
int UnpackRgb(T_geometry *geometry, unsigned char method, unsigned char *src_data,
int src_size, int dst_bpp, int dst_width, int dst_height,
unsigned char *dst_data, int dst_size)
{
if (*src_data == 0)
{
if (dst_size != src_size - 1)
{
#ifdef TEST
*logofs << "UnpackRgb: PANIC! Invalid destination size "
<< dst_size << " with source " << src_size
<< ".\n" << logofs_flush;
#endif
return -1;
}
#ifdef TEST
*logofs << "UnpackRgb: Expanding " << src_size - 1
<< " bytes of plain RGB data.\n" << logofs_flush;
#endif
memcpy(dst_data, src_data + 1, src_size - 1);
return 1;
}
unsigned int check_size = dst_size;
int result = ZDecompress(&unpackStream, dst_data, &check_size,
src_data + 1, src_size - 1);
if (result != Z_OK)
{
#ifdef PANIC
*logofs << "UnpackRgb: PANIC! Failure decompressing RGB data. "
<< "Error is '" << zError(result) << "'.\n"
<< logofs_flush;
#endif
cerr << "Error" << ": Failure decompressing RGB data. "
<< "Error is '" << zError(result) << "'.\n";
return -1;
}
else if (check_size != (unsigned int) dst_size)
{
#ifdef PANIC
*logofs << "UnpackRgb: PANIC! Size mismatch in RGB data. "
<< "Resulting size is " << check_size << " with "
<< "expected size " << dst_size << ".\n"
<< logofs_flush;
#endif
cerr << "Error" << ": Size mismatch in RGB data. "
<< "Resulting size is " << check_size << " with "
<< "expected size " << dst_size << ".\n";
return -1;
}
#ifdef TEST
*logofs << "UnpackRgb: Decompressed " << src_size - 1
<< " bytes to " << dst_size << " bytes of RGB data.\n"
<< logofs_flush;
#endif
return 1;
}
String ZDecompress(const String& s, Gate2<int, int> progress)
{
return ZDecompress(~s, s.GetCount(), progress);
}
int ZDecompress(Stream& out, Stream& in, Gate2<int, int> progress)
{
return ZDecompress(out, in, (int)in.GetLeft(), progress);
}
