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primarykey
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15658911
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0
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0
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2013-03-27T12:34:35.827
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2013-03-27T12:34:35.827
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986743
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15658105
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Luckily, chromium is open source so you can look into the well-documented code. Ok... I found it: <a href="https://code.google.com/p/chromium/codesearch#chromium/src/content/browser/download/download_file_impl.cc&sq=package%3achromium&type=cs&l=104&rcl=1364340364" rel="nofollow">here</a> <code>RenameAndUniquify</code> is: <pre><code>void DownloadFileImpl::RenameAndUniquify( const base::FilePath& full_path, const RenameCompletionCallback& callback) { DCHECK(BrowserThread::CurrentlyOn(BrowserThread::FILE)); base::FilePath new_path(full_path); int uniquifier = file_util::GetUniquePathNumber(new_path, FILE_PATH_LITERAL("")); if (uniquifier > 0) { new_path = new_path.InsertBeforeExtensionASCII( base::StringPrintf(" (%d)", uniquifier)); } ... } </code></pre> and <code>InsertBeforeExtension</code> calls <code>ExtensionSeperatorPosition</code> which interests you (<a href="https://code.google.com/p/chromium/codesearch#chromium/src/base/files/file_path.cc&sq=package%3achromium&type=cs&l=126&rcl=1364340364" rel="nofollow">link</a>): <pre><code>// Find the position of the '.' that separates the extension from the rest // of the file name. The position is relative to BaseName(), not value(). // This allows a second extension component of up to 4 characters when the // rightmost extension component is a common double extension (gz, bz2, Z). // For example, foo.tar.gz or foo.tar.Z would have extension components of // '.tar.gz' and '.tar.Z' respectively. Returns npos if it can't find an // extension. StringType::size_type ExtensionSeparatorPosition(const StringType& path) { // Special case "." and ".." if (path == FilePath::kCurrentDirectory || path == FilePath::kParentDirectory) return StringType::npos; const StringType::size_type last_dot = path.rfind(FilePath::kExtensionSeparator); // No extension, or the extension is the whole filename. if (last_dot == StringType::npos || last_dot == 0U) return last_dot; const StringType::size_type penultimate_dot = path.rfind(FilePath::kExtensionSeparator, last_dot - 1); const StringType::size_type last_separator = path.find_last_of(FilePath::kSeparators, last_dot - 1, arraysize(FilePath::kSeparators) - 1); if (penultimate_dot == StringType::npos || (last_separator != StringType::npos && penultimate_dot < last_separator)) { return last_dot; } for (size_t i = 0; i < arraysize(kCommonDoubleExtensions); ++i) { StringType extension(path, penultimate_dot + 1); if (LowerCaseEqualsASCII(extension, kCommonDoubleExtensions[i])) return penultimate_dot; } StringType extension(path, last_dot + 1); for (size_t i = 0; i < arraysize(kCommonDoubleExtensionSuffixes); ++i) { if (LowerCaseEqualsASCII(extension, kCommonDoubleExtensionSuffixes[i])) { if ((last_dot - penultimate_dot) <= 5U && (last_dot - penultimate_dot) > 1U) { return penultimate_dot; } } } return last_dot; } </code></pre>
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1. POHow does google chrome auto-rename files when downloading files?
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1. USzenpoy
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