1*a03ca8b9SKrzysztof Kosiński // Copyright 2017 The Chromium Authors. All rights reserved. 2*a03ca8b9SKrzysztof Kosiński // Use of this source code is governed by a BSD-style license that can be 3*a03ca8b9SKrzysztof Kosiński // found in the LICENSE file. 4*a03ca8b9SKrzysztof Kosiński 5*a03ca8b9SKrzysztof Kosiński #include "components/zucchini/ensemble_matcher.h" 6*a03ca8b9SKrzysztof Kosiński 7*a03ca8b9SKrzysztof Kosiński #include <algorithm> 8*a03ca8b9SKrzysztof Kosiński #include <limits> 9*a03ca8b9SKrzysztof Kosiński 10*a03ca8b9SKrzysztof Kosiński #include "base/containers/cxx20_erase.h" 11*a03ca8b9SKrzysztof Kosiński #include "base/logging.h" 12*a03ca8b9SKrzysztof Kosiński 13*a03ca8b9SKrzysztof Kosiński namespace zucchini { 14*a03ca8b9SKrzysztof Kosiński 15*a03ca8b9SKrzysztof Kosiński /******** EnsembleMatcher ********/ 16*a03ca8b9SKrzysztof Kosiński 17*a03ca8b9SKrzysztof Kosiński EnsembleMatcher::EnsembleMatcher() = default; 18*a03ca8b9SKrzysztof Kosiński 19*a03ca8b9SKrzysztof Kosiński EnsembleMatcher::~EnsembleMatcher() = default; 20*a03ca8b9SKrzysztof Kosiński Trim()21*a03ca8b9SKrzysztof Kosińskivoid EnsembleMatcher::Trim() { 22*a03ca8b9SKrzysztof Kosiński // Trim rule: If > 1 DEX files are found then ignore all DEX. This is done 23*a03ca8b9SKrzysztof Kosiński // because we do not yet support MultiDex, under which contents can move 24*a03ca8b9SKrzysztof Kosiński // across file boundary between "old" and "new" archives. When this occurs, 25*a03ca8b9SKrzysztof Kosiński // forcing matches of DEX files and patching them separately can result in 26*a03ca8b9SKrzysztof Kosiński // larger patches than naive patching. 27*a03ca8b9SKrzysztof Kosiński auto is_match_dex = [](const ElementMatch& match) { 28*a03ca8b9SKrzysztof Kosiński return match.exe_type() == kExeTypeDex; 29*a03ca8b9SKrzysztof Kosiński }; 30*a03ca8b9SKrzysztof Kosiński auto num_dex = std::count_if(matches_.begin(), matches_.end(), is_match_dex); 31*a03ca8b9SKrzysztof Kosiński if (num_dex > 1) { 32*a03ca8b9SKrzysztof Kosiński LOG(WARNING) << "Found " << num_dex << " DEX: Ignoring all."; 33*a03ca8b9SKrzysztof Kosiński base::EraseIf(matches_, is_match_dex); 34*a03ca8b9SKrzysztof Kosiński } 35*a03ca8b9SKrzysztof Kosiński } 36*a03ca8b9SKrzysztof Kosiński 37*a03ca8b9SKrzysztof Kosiński } // namespace zucchini 38