thirdparty/scummvm
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COMMON: Use the file cache in ZipArchive::listMembers for performance.

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This avoids a new iteration through the .zip file for every listMember call.
Instead it uses the "_hash" HashMap, which already contains all the filenames
and is filled on initializing the ZipArchive by unzOpen.
This commit is contained in:
Johannes Schickel 2012-04-30 00:09:56 +02:00
parent e41e412c9e
commit f23ca8b62b
1 changed files with 7 additions and 13 deletions
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20
common/unzip.cpp
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@ -1463,22 +1463,16 @@ bool ZipArchive::hasFile(const String &name) const {
}
int ZipArchive::listMembers(ArchiveMemberList &list) const {
int matches = 0;
int err = unzGoToFirstFile(_zipFile);
int members = 0;
while (err == UNZ_OK) {
char szCurrentFileName[UNZ_MAXFILENAMEINZIP+1];
if (unzGetCurrentFileInfo(_zipFile, NULL,
szCurrentFileName, sizeof(szCurrentFileName)-1,
NULL, 0, NULL, 0) == UNZ_OK) {
list.push_back(ArchiveMemberList::value_type(new GenericArchiveMember(szCurrentFileName, this)));
matches++;
}
err = unzGoToNextFile(_zipFile);
const unz_s *const archive = (const unz_s *)_zipFile;
for (ZipHash::const_iterator i = archive->_hash.begin(), end = archive->_hash.end();
i != end; ++i) {
list.push_back(ArchiveMemberList::value_type(new GenericArchiveMember(i->_key, this)));
++members;
}
return matches;
return members;
}
const ArchiveMemberPtr ZipArchive::getMember(const String &name) const {