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| 1 // Copyright 2005-2009 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 | |
| 17 #include "omaha/base/atl_regexp.h" | |
| 18 | |
| 19 namespace omaha { | |
| 20 | |
| 21 const int kMaxArgs = 16; | |
| 22 | |
| 23 AtlRE::AtlRE(const TCHAR* pattern, bool case_sensitive) { | |
| 24 ASSERT(pattern, (L"")); | |
| 25 REParseError status = re_.Parse(pattern, case_sensitive); | |
| 26 ASSERT(status == REPARSE_ERROR_OK, (L"")); | |
| 27 } | |
| 28 | |
| 29 AtlRE::~AtlRE() { | |
| 30 } | |
| 31 | |
| 32 bool AtlRE::DoMatchImpl(const TCHAR* text, | |
| 33 CString* args[], | |
| 34 int n, | |
| 35 const TCHAR** match_end) const { | |
| 36 // text may be NULL. | |
| 37 ASSERT(args, (L"")); | |
| 38 | |
| 39 if (!text) { | |
| 40 return false; | |
| 41 } | |
| 42 | |
| 43 AtlMatchContext matches; | |
| 44 BOOL b = re_.Match(text, &matches, match_end); | |
| 45 if (!b || matches.m_uNumGroups < static_cast<uint32>(n)) { | |
| 46 return false; | |
| 47 } | |
| 48 | |
| 49 // Oddly enough, the Match call will make match_end | |
| 50 // point off the end of the string if the result is at the | |
| 51 // end of the string. We check this and handle it. | |
| 52 if (match_end) { | |
| 53 if ((*match_end - text) >= lstrlen(text)) { | |
| 54 *match_end = NULL; | |
| 55 } | |
| 56 } | |
| 57 | |
| 58 const TCHAR* start = 0; | |
| 59 const TCHAR* end = 0; | |
| 60 for (int i = 0; i < n; ++i) { | |
| 61 matches.GetMatch(i, &start, &end); | |
| 62 ptrdiff_t len = end - start; | |
| 63 ASSERT(args[i], (L"")); | |
| 64 // len+1 for the NULL character that's placed by lstrlen | |
| 65 VERIFY1(lstrcpyn(args[i]->GetBufferSetLength(len), start, len + 1) != NULL); | |
| 66 } | |
| 67 return true; | |
| 68 } | |
| 69 | |
| 70 } // namespace omaha | |
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