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| 1 // Copyright 2004-2009 Google Inc. | |
| 2 // | |
| 3 // Licensed under the Apache License, Version 2.0 (the "License"); | |
| 4 // you may not use this file except in compliance with the License. | |
| 5 // You may obtain a copy of the License at | |
| 6 // | |
| 7 // http://www.apache.org/licenses/LICENSE-2.0 | |
| 8 // | |
| 9 // Unless required by applicable law or agreed to in writing, software | |
| 10 // distributed under the License is distributed on an "AS IS" BASIS, | |
| 11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |
| 12 // See the License for the specific language governing permissions and | |
| 13 // limitations under the License. | |
| 14 // ======================================================================== | |
| 15 | |
| 16 #include "omaha/base/debug.h" | |
| 17 #include "omaha/base/logging.h" | |
| 18 #include "omaha/base/module_utils.h" | |
| 19 #include "omaha/base/utils.h" | |
| 20 | |
| 21 namespace omaha { | |
| 22 | |
| 23 const int kLongPath = (_MAX_PATH * 2); | |
| 24 const int kReallyLongPath = (kLongPath * 2); | |
| 25 | |
| 26 HMODULE ModuleFromStatic(void* pointer_to_static_in_module) { | |
| 27 ASSERT(pointer_to_static_in_module, (L"")); | |
| 28 | |
| 29 MEMORY_BASIC_INFORMATION info = { 0 }; | |
| 30 VirtualQuery(reinterpret_cast<void*>(pointer_to_static_in_module), | |
| 31 &info, sizeof(info)); | |
| 32 // Module handles are just the allocation base address of the module. | |
| 33 return reinterpret_cast<HMODULE>(info.AllocationBase); | |
| 34 } | |
| 35 | |
| 36 bool GetModuleDirectory(HMODULE module, TCHAR* directory) { | |
| 37 ASSERT(directory, (L"Invalid arguments")); | |
| 38 if (!directory) { | |
| 39 return false; | |
| 40 } | |
| 41 | |
| 42 // PathRemoveFileSpec only supports buffers up to MAX_PATH so we must | |
| 43 // limit ourselves to this. It will "always" work anyway, given that | |
| 44 // our installation path is not absurdly deep. | |
| 45 if (0 == GetModuleFileName(module, directory, MAX_PATH)) { | |
| 46 ASSERT(false, (L"Path longer than MAX_PATH")); | |
| 47 return false; | |
| 48 } | |
| 49 | |
| 50 if (!String_PathRemoveFileSpec(directory)) { | |
| 51 ASSERT(false, (L"PathRemoveFileSpec failed")); | |
| 52 // Ensure we don't return with an incorrect path in the buffer that was | |
| 53 // passed in. | |
| 54 ZeroMemory(directory, MAX_PATH * sizeof(TCHAR)); | |
| 55 return false; | |
| 56 } | |
| 57 | |
| 58 return true; | |
| 59 } | |
| 60 | |
| 61 HRESULT GetModuleFileName(HMODULE module, CString* path) { | |
| 62 ASSERT(path, (_T("must be valid"))); | |
| 63 | |
| 64 // _MAX_PATH should cover at least 99% of the paths | |
| 65 int buf_size = _MAX_PATH; | |
| 66 int chars_copied = 0; | |
| 67 while ((chars_copied = ::GetModuleFileName(module, | |
| 68 CStrBuf(*path, buf_size + 1), | |
| 69 buf_size)) == buf_size) { | |
| 70 // We'll stop before things get ridiculous | |
| 71 if (buf_size >= kReallyLongPath) { | |
| 72 UTIL_LOG(LEVEL_ERROR, | |
| 73 (_T("[GetModuleFileName - unusually long path '%s']"), path)); | |
| 74 chars_copied = 0; | |
| 75 ::SetLastError(ERROR_NOT_ENOUGH_MEMORY); | |
| 76 break; | |
| 77 } | |
| 78 | |
| 79 buf_size *= 2; | |
| 80 } | |
| 81 | |
| 82 if (!chars_copied) { | |
| 83 path->Empty(); | |
| 84 return GetCurError(); | |
| 85 } | |
| 86 | |
| 87 return S_OK; | |
| 88 } | |
| 89 | |
| 90 } // namespace omaha | |
| 91 | |
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Chromium Code Reviews
Issue 624713003:
Keep only base/extractor.[cc|h]. (Closed)
Base URL: https://chromium.googlesource.com/external/omaha.git@master