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Added Packer::checkFinalCompressionRatio().

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committer: mfx <mfx> 976775892 +0000
This commit is contained in:
Markus F.X.J. Oberhumer
2000-12-14 06:38:12 +00:00
parent f751473195
commit 8ef3beb6c6
13 changed files with 79 additions and 32 deletions
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src/packer.cpp
+18 -3
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@@ -260,9 +260,9 @@ bool Packer::checkCompressionRatio(unsigned u_len, unsigned c_len) const
//assert((off_t)u_len < file_size);
#if 1
if (c_len >= u_len - u_len / 8) // min. 12.5% gain
if (c_len + 512 >= u_len) // min. 512 bytes gain
return false;
if (c_len + 512 >= u_len) // min. 512 bytes gain
if (c_len >= u_len - u_len / 8) // min. 12.5% gain
return false;
#else
if (c_len >= u_len)
@@ -272,6 +272,21 @@ bool Packer::checkCompressionRatio(unsigned u_len, unsigned c_len) const
}
bool Packer::checkFinalCompressionRatio(const OutputFile *fo) const
{
unsigned u_len = file_size;
unsigned c_len = fo->getBytesWritten();
assert((int)u_len > 0);
assert((int)c_len > 0);
if (c_len + 4096 <= u_len) // ok if we have 4096 bytes gain
return true;
return checkCompressionRatio(u_len, c_len);
}
/*************************************************************************
//
**************************************************************************/
@@ -350,7 +365,7 @@ void Packer::verifyOverlappingDecompression(MemBuffer *buf,
// buf was allocated with MemBuffer.allocForCompression(), and
// its contents are no longer needed, i.e. the compressed data
// must have been already written.
// We now could performa a real overlapping decompression and
// We now could perform a real overlapping decompression and
// verify the checksum.
//
// Note: