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Add zstd fast levels and update 7z property sizes

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- add the "fast compression levels" of zstd via "fast" option (fast=1..64)
- change the 7-Zip property sizes of LZ4, LZ5 and Zstandard to 3
- 3 and 5 byte header are valid now (default is 3)
- update the Methods-Extern.md file, to reflect the property changes
This commit is contained in:
Tino Reichardt
2018-11-25 18:03:13 +01:00
parent 4728ce24ef
commit f98edef556
15 changed files with 129 additions and 88 deletions
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17
CPP/7zip/Archive/7z/7zHandler.cpp
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@@ -507,7 +507,7 @@ HRESULT CHandler::SetMethodToProp(CNum folderIndex, PROPVARIANT *prop) const
else if (id == k_LZ4)
{
name = "LZ4";
if (propsSize == 5)
if (propsSize == 3 || propsSize == 5)
{
char *dest = s;
*dest++ = 'v';
@@ -525,7 +525,7 @@ HRESULT CHandler::SetMethodToProp(CNum folderIndex, PROPVARIANT *prop) const
else if (id == k_LZ5)
{
name = "LZ5";
if (propsSize == 5)
if (propsSize == 3 || propsSize == 5)
{
char *dest = s;
*dest++ = 'v';
@@ -543,9 +543,10 @@ HRESULT CHandler::SetMethodToProp(CNum folderIndex, PROPVARIANT *prop) const
else if (id == k_ZSTD)
{
name = "ZSTD";
if (propsSize == 5)
if (propsSize == 3 || propsSize == 5)
{
char *dest = s;
UInt32 l = props[2];
*dest++ = 'v';
ConvertUInt32ToString(props[0], dest);
dest += MyStringLen(dest);
@@ -553,8 +554,14 @@ HRESULT CHandler::SetMethodToProp(CNum folderIndex, PROPVARIANT *prop) const
ConvertUInt32ToString(props[1], dest);
dest += MyStringLen(dest);
*dest++ = ',';
*dest++ = 'l';
ConvertUInt32ToString(props[2], dest);
if (l <= 22) {
*dest++ = 'l';
ConvertUInt32ToString(l, dest);
} else {
*dest++ = 'f';
*dest++ = 'l';
ConvertUInt32ToString(l - 32, dest);
}
dest += MyStringLen(dest);
}
}