From 807d835c2bfc5d794a74f9690d1fafbe55ff88cc Mon Sep 17 00:00:00 2001
From: Dave Parks <davep@lindenlab.com>
Date: Fri, 2 Apr 2010 14:43:05 -0500
Subject: First draft of skin weights in .mesh asset
---
indra/llcommon/llsdserialize.cpp | 137 +++++++++++++++++++++++++++++++++++++++
indra/llcommon/llsdserialize.h | 4 ++
2 files changed, 141 insertions(+)
(limited to 'indra/llcommon')
diff --git a/indra/llcommon/llsdserialize.cpp b/indra/llcommon/llsdserialize.cpp
index cf337be161..c341b15539 100644
--- a/indra/llcommon/llsdserialize.cpp
+++ b/indra/llcommon/llsdserialize.cpp
@@ -39,6 +39,7 @@
#include <iostream>
#include "apr_base64.h"
+#include "zlib/zlib.h" // for davep's dirty little zip functions
#if !LL_WINDOWS
#include <netinet/in.h> // htonl & ntohl
@@ -1989,3 +1990,139 @@ std::ostream& operator<<(std::ostream& s, const LLSD& llsd)
return s;
}
+
+//dirty little zippers -- yell at davep if these are horrid
+
+//return a string containing gzipped bytes of binary serialized LLSD
+// VERY inefficient -- creates several copies of LLSD block in memory
+std::string zip_llsd(LLSD& data)
+{
+ std::stringstream llsd_strm;
+
+ LLSDSerialize::serialize(data, llsd_strm, LLSDSerialize::LLSD_BINARY);
+
+ z_stream strm;
+ strm.zalloc = Z_NULL;
+ strm.zfree = Z_NULL;
+ strm.opaque = Z_NULL;
+
+ S32 ret = deflateInit(&strm, Z_BEST_COMPRESSION);
+ if (ret != Z_OK)
+ {
+ llwarns << "Failed to compress LLSD block." << llendl;
+ return std::string();
+ }
+
+ std::string source = llsd_strm.str();
+
+ strm.avail_in = source.size();
+ strm.next_in = (U8*) source.data();
+ U8* output = new U8[strm.avail_in];
+ strm.avail_out = strm.avail_in;
+ strm.next_out = output;
+ ret = deflate(&strm, Z_FINISH);
+ if (ret != Z_STREAM_END)
+ {
+ delete [] output;
+ llwarns << "Failed to compress LLSD block." << llendl;
+ }
+
+ std::string::size_type size = source.size()-strm.avail_out;
+
+ std::string result((char*) output, size);
+ deflateEnd(&strm);
+ delete [] output;
+
+ return result;
+}
+
+//decompress a block of LLSD from provided istream
+// not very efficient -- creats a copy of decompressed LLSD block in memory
+// and deserializes from that copy using LLSDSerialize
+bool unzip_llsd(LLSD& data, std::istream& is, S32 size)
+{
+ U8* result = NULL;
+ U32 cur_size = 0;
+ z_stream strm;
+
+ const U32 CHUNK = 65536;
+
+ U8 *in = new U8[size];
+ is.read((char*) in, size);
+
+ U8 out[CHUNK];
+
+ strm.zalloc = Z_NULL;
+ strm.zfree = Z_NULL;
+ strm.opaque = Z_NULL;
+ strm.avail_in = size;
+ strm.next_in = in;
+
+ S32 ret = inflateInit(&strm);
+
+ if (ret != Z_OK)
+ {
+ llerrs << "WTF?" << llendl;
+ }
+
+ do
+ {
+ strm.avail_out = CHUNK;
+ strm.next_out = out;
+ ret = inflate(&strm, Z_NO_FLUSH);
+ if (ret == Z_STREAM_ERROR)
+ {
+ inflateEnd(&strm);
+ free(result);
+ delete [] in;
+ return false;
+ }
+
+ switch (ret)
+ {
+ case Z_NEED_DICT:
+ ret = Z_DATA_ERROR;
+ case Z_DATA_ERROR:
+ case Z_MEM_ERROR:
+ inflateEnd(&strm);
+ free(result);
+ delete [] in;
+ return false;
+ break;
+ }
+
+ U32 have = CHUNK-strm.avail_out;
+
+ result = (U8*) realloc(result, cur_size + have);
+ memcpy(result+cur_size, out, have);
+ cur_size += have;
+
+ } while (strm.avail_out == 0);
+
+ inflateEnd(&strm);
+ delete [] in;
+
+ if (ret != Z_STREAM_END)
+ {
+ free(result);
+ return false;
+ }
+
+ //result now points to the decompressed LLSD block
+ {
+ std::string res_str((char*) result, cur_size);
+ std::istringstream istr(res_str);
+
+ if (!LLSDSerialize::deserialize(data, istr, cur_size))
+ {
+ llwarns << "Failed to unzip LLSD block" << llendl;
+ return false;
+ }
+ }
+
+ free(result);
+ return true;
+}
+
+
+
diff --git a/indra/llcommon/llsdserialize.h b/indra/llcommon/llsdserialize.h
index 2f2b292189..390eaca783 100644
--- a/indra/llcommon/llsdserialize.h
+++ b/indra/llcommon/llsdserialize.h
@@ -796,4 +796,8 @@ public:
}
};
+//dirty little zip functions -- yell at davep
+LL_COMMON_API std::string zip_llsd(LLSD& data);
+LL_COMMON_API bool unzip_llsd(LLSD& data, std::istream& is, S32 size);
+
#endif // LL_LLSDSERIALIZE_H
--
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