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Anvil: switched inflate to stream mode.

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This removes the fixed-size buffer which could have caused #1307 and #1366.
This commit is contained in:
madmaxoft
2014-09-03 19:36:53 +02:00
parent 1cc65b6264
commit 44c1d9c248
3 changed files with 70 additions and 18 deletions
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62
src/StringCompression.cpp
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@@ -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)
}