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| author | sra@chromium.org <sra@chromium.org@0039d316-1c4b-4281-b951-d872f2087c98> | 2009-05-06 04:02:10 +0000 |
|---|---|---|
| committer | sra@chromium.org <sra@chromium.org@0039d316-1c4b-4281-b951-d872f2087c98> | 2009-05-06 04:02:10 +0000 |
| commit | f76b3b04a4c092d7db4cc2a75da4ca7fbac1f620 (patch) | |
| tree | f32d9b1d982f427681c4c3a95c266afebf5e523a /third_party/courgette/ensemble.cc | |
| parent | 5754c035975900ea5a48cb33aaa2c73d77c2cb35 (diff) | |
| download | chromium_src-f76b3b04a4c092d7db4cc2a75da4ca7fbac1f620.zip chromium_src-f76b3b04a4c092d7db4cc2a75da4ca7fbac1f620.tar.gz chromium_src-f76b3b04a4c092d7db4cc2a75da4ca7fbac1f620.tar.bz2 | |
Move Courgette from internal depot to third_party.
Review URL: http://codereview.chromium.org/113009
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@15377 0039d316-1c4b-4281-b951-d872f2087c98
Diffstat (limited to 'third_party/courgette/ensemble.cc')
| -rw-r--r-- | third_party/courgette/ensemble.cc | 102 |
1 files changed, 102 insertions, 0 deletions
diff --git a/third_party/courgette/ensemble.cc b/third_party/courgette/ensemble.cc new file mode 100644 index 0000000..4c8f013 --- /dev/null +++ b/third_party/courgette/ensemble.cc @@ -0,0 +1,102 @@ +// Copyright (c) 2009 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// *** File comments
+
+#include "third_party/courgette/ensemble.h"
+
+#include "base/basictypes.h"
+#include "base/logging.h"
+#include "base/string_util.h"
+
+#include "third_party/courgette/image_info.h"
+#include "third_party/courgette/region.h"
+#include "third_party/courgette/streams.h"
+#include "third_party/courgette/simple_delta.h"
+
+namespace courgette {
+
+Element::Element(Kind kind, Ensemble* ensemble, const Region& region)
+ : kind_(kind), ensemble_(ensemble), region_(region) {
+}
+
+std::string Element::Name() const {
+ return ensemble_->name() + "("
+ + IntToString(kind()) + ","
+ + Uint64ToString(offset_in_ensemble()) + ","
+ + Uint64ToString(region().length()) + ")";
+}
+
+// A subclass of Element that has a PEInfo.
+class ElementWinPE : public Element {
+ public:
+ ElementWinPE(Kind kind, Ensemble* ensemble, const Region& region,
+ PEInfo* info)
+ : Element(kind, ensemble, region),
+ pe_info_(info) {
+ }
+
+ virtual PEInfo* GetPEInfo() const { return pe_info_; }
+
+ protected:
+ ~ElementWinPE() { delete pe_info_; }
+
+ private:
+ PEInfo* pe_info_; // Owned by |this|.
+};
+
+// Scans the Ensemble's region, sniffing out Elements. We assume that the
+// elements do not overlap.
+Status Ensemble::FindEmbeddedElements() {
+ size_t length = region_.length();
+ const uint8* start = region_.start();
+
+ size_t position = 0;
+ while (position < length) {
+ // Quick test; Windows executables begin with 'MZ'.
+ if (start[position] == 'M' &&
+ position + 1 < length && start[position + 1] == 'Z') {
+ courgette::PEInfo *info = new courgette::PEInfo();
+ info->Init(start + position, length - position);
+ if (info->ParseHeader()) {
+ Region region(start + position, info->length());
+
+ if (info->has_text_section()) {
+ Element* element = new ElementWinPE(Element::WIN32_X86_WITH_CODE,
+ this, region, info);
+ owned_elements_.push_back(element);
+ elements_.push_back(element);
+ position += region.length();
+ continue;
+ }
+
+ // If we had a clever transformation for resource-only executables we
+ // should identify the suitable elements here:
+ if (!info->has_text_section() && false) {
+ Element* element = new ElementWinPE(Element::WIN32_NOCODE,
+ this, region, info);
+ owned_elements_.push_back(element);
+ elements_.push_back(element);
+ position += region.length();
+ continue;
+ }
+ }
+ delete info;
+ }
+
+ // This is where to add new formats, e.g. Linux executables, Dalvik
+ // executables etc.
+
+ // No Element found at current position.
+ ++position;
+ }
+ return C_OK;
+}
+
+Ensemble::~Ensemble() {
+ for (size_t i = 0; i < owned_elements_.size(); ++i)
+ delete owned_elements_[i];
+}
+
+} // namespace
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