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authorAlexander Harkness <bearbin@gmail.com>2014-10-11 19:32:21 +0200
committerAlexander Harkness <bearbin@gmail.com>2014-10-11 19:32:21 +0200
commit93833069a80fe4aec33a95148df39ad40671ddaf (patch)
tree2e6a335a60e618b5fe456ca8a586a2c5448c8c87 /src/StringCompression.cpp
parentReverted submodule changes. (diff)
parentMerge pull request #1528 from kjanku1/master (diff)
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Diffstat (limited to 'src/StringCompression.cpp')
-rw-r--r--src/StringCompression.cpp62
1 files changed, 62 insertions, 0 deletions
diff --git a/src/StringCompression.cpp b/src/StringCompression.cpp
index 71d64e71e..af9f1687f 100644
--- a/src/StringCompression.cpp
+++ b/src/StringCompression.cpp
@@ -180,3 +180,65 @@ extern int UncompressStringGZIP(const char * a_Data, size_t a_Length, AString &
+
+extern int InflateString(const char * a_Data, size_t a_Length, AString & a_Uncompressed)
+{
+ a_Uncompressed.reserve(a_Length);
+
+ char Buffer[64 KiB];
+ z_stream strm;
+ memset(&strm, 0, sizeof(strm));
+ strm.next_in = (Bytef *)a_Data;
+ strm.avail_in = (uInt)a_Length;
+ strm.next_out = (Bytef *)Buffer;
+ strm.avail_out = sizeof(Buffer);
+
+ int res = inflateInit(&strm); // Force GZIP decoding
+ if (res != Z_OK)
+ {
+ LOG("%s: inflation initialization failed: %d (\"%s\").", __FUNCTION__, res, strm.msg);
+ return res;
+ }
+
+ for (;;)
+ {
+ res = inflate(&strm, Z_NO_FLUSH);
+ switch (res)
+ {
+ case Z_OK:
+ {
+ // Some data has been uncompressed. Consume the buffer and continue uncompressing
+ a_Uncompressed.append(Buffer, sizeof(Buffer) - strm.avail_out);
+ strm.next_out = (Bytef *)Buffer;
+ strm.avail_out = sizeof(Buffer);
+ if (strm.avail_in == 0)
+ {
+ // All data has been uncompressed
+ inflateEnd(&strm);
+ return Z_OK;
+ }
+ break;
+ }
+
+ case Z_STREAM_END:
+ {
+ // Finished uncompressing. Consume the rest of the buffer and return
+ a_Uncompressed.append(Buffer, sizeof(Buffer) - strm.avail_out);
+ inflateEnd(&strm);
+ return Z_OK;
+ }
+
+ default:
+ {
+ // An error has occurred, log it and return the error value
+ LOG("%s: inflation failed: %d (\"%s\").", __FUNCTION__, res, strm.msg);
+ inflateEnd(&strm);
+ return res;
+ }
+ } // switch (res)
+ } // while (true)
+}
+
+
+
+