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This commit is contained in:
Igor Pavlov
2021-07-22 23:00:14 +01:00
committed by Kornel
parent 4a960640a3
commit 585698650f
619 changed files with 34904 additions and 10859 deletions
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35
CPP/7zip/Archive/IArchive.h
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@@ -10,6 +10,30 @@
#define ARCHIVE_INTERFACE_SUB(i, base, x) DECL_INTERFACE_SUB(i, base, 6, x)
#define ARCHIVE_INTERFACE(i, x) ARCHIVE_INTERFACE_SUB(i, IUnknown, x)
/*
How the function in 7-Zip returns object for output parameter via pointer
1) The caller sets the value of variable before function call:
PROPVARIANT : vt = VT_EMPTY
BSTR : NULL
IUnknown* and derived interfaces : NULL
another scalar types : any non-initialized value is allowed
2) The callee in current 7-Zip code now can free input object for output parameter:
PROPVARIANT : the callee calls VariantClear(propvaiant_ptr) for input
value stored in variable
another types : the callee ignores stored value.
3) The callee writes new value to variable for output parameter and
returns execution to caller.
4) The caller must free or release object returned by the callee:
PROPVARIANT : VariantClear(&propvaiant)
BSTR : SysFreeString(bstr)
IUnknown* and derived interfaces : if (ptr) ptr->Relase()
*/
namespace NFileTimeType
{
enum EEnum
@@ -34,6 +58,7 @@ namespace NArcInfoFlags
const UInt32 kPreArc = 1 << 9; // such archive can be stored before real archive (like SFX stub)
const UInt32 kSymLinks = 1 << 10; // the handler supports symbolic links
const UInt32 kHardLinks = 1 << 11; // the handler supports hard links
const UInt32 kByExtOnlyOpen = 1 << 12; // call handler only if file extension matches
}
namespace NArchive
@@ -106,7 +131,7 @@ namespace NArchive
enum
{
kOK = 0
, // kError
// , kError
};
}
}
@@ -137,13 +162,13 @@ IArchiveExtractCallback::GetStream()
Int32 askExtractMode (Extract::NAskMode)
if (askMode != NExtract::NAskMode::kExtract)
{
then the callee can not real stream: (*inStream == NULL)
then the callee doesn't write data to stream: (*outStream == NULL)
}
Out:
(*inStream == NULL) - for directories
(*inStream == NULL) - if link (hard link or symbolic link) was created
if (*inStream == NULL && askMode == NExtract::NAskMode::kExtract)
(*outStream == NULL) - for directories
(*outStream == NULL) - if link (hard link or symbolic link) was created
if (*outStream == NULL && askMode == NExtract::NAskMode::kExtract)
{
then the caller must skip extracting of that file.
}