OpenTTD Source
20241108-master-g80f628063a
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Filter using Zlib compression. More...
Public Member Functions | |
ZlibSaveFilter (std::shared_ptr< SaveFilter > chain, uint8_t compression_level) | |
Initialise this filter. More... | |
~ZlibSaveFilter () | |
Clean up what we allocated. | |
void | WriteLoop (uint8_t *p, size_t len, int mode) |
Helper loop for writing the data. More... | |
void | Write (uint8_t *buf, size_t size) override |
Write a given number of bytes into the savegame. More... | |
void | Finish () override |
Prepare everything to finish writing the savegame. | |
Public Member Functions inherited from SaveFilter | |
SaveFilter (std::shared_ptr< SaveFilter > chain) | |
Initialise this filter. More... | |
virtual | ~SaveFilter () |
Make sure the writers are properly closed. | |
Data Fields | |
z_stream | z |
Stream state we are writing to. | |
uint8_t | fwrite_buf [MEMORY_CHUNK_SIZE] |
Buffer for writing to the file. | |
Data Fields inherited from SaveFilter | |
std::shared_ptr< SaveFilter > | chain |
Chained to the (savegame) filters. | |
Filter using Zlib compression.
Definition at line 2459 of file saveload.cpp.
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inline |
Initialise this filter.
chain | The next filter in this chain. |
compression_level | The requested level of compression. |
Definition at line 2468 of file saveload.cpp.
References SlError().
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inlineoverridevirtual |
Write a given number of bytes into the savegame.
buf | The bytes to write. |
len | The number of bytes to write. |
Implements SaveFilter.
Definition at line 2514 of file saveload.cpp.
References WriteLoop().
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inline |
Helper loop for writing the data.
p | The bytes to write. |
len | Amount of bytes to write. |
mode | Mode for deflate. |
For the poor next soul who sees many valgrind warnings of the "Conditional jump or move depends on uninitialised value(s)" kind: According to the author of zlib it is not a bug and it won't be fixed. http://groups.google.com/group/comp.compression/browse_thread/thread/b154b8def8c2a3ef/cdf9b8729ce17ee2 [Mark Adler, Feb 24 2004, 'zlib-1.2.1 valgrind warnings' in the newsgroup comp.compression]
Definition at line 2486 of file saveload.cpp.
References SaveFilter::chain, fwrite_buf, and SlError().