Add base to the repository.

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@8 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 119 insertions, 0 deletions

diff --git a/base/command_line.h b/base/command_line.h
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+++ b/base/command_line.h
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+// Copyright 2008, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//    * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//    * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//    * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+//
+// This file contains a class that can be used to extract the salient
+// elements of a command line in a relatively lightweight manner.
+// Switches can optionally have a value attached using an equals sign,
+// as in "-switch=value".  Arguments that aren't prefixed with a
+// switch prefix are considered "loose parameters".  Switch names
+// are case-insensitive.
+
+#ifndef BASE_COMMAND_LINE_H__
+#define BASE_COMMAND_LINE_H__
+
+#include <map>
+#include <string>
+#include <vector>
+
+#include "base/basictypes.h"
+#include "base/scoped_ptr.h"
+
+class CommandLine {
+ public:
+  // Creates a parsed version of the command line used to launch
+  // the current process.
+  CommandLine();
+
+  // Creates a parsed version of the given command-line string.
+  // The program name is assumed to be the first item in the string.
+  CommandLine(const std::wstring& command_line);
+
+  ~CommandLine();
+
+  // Returns true if this command line contains the given switch.
+  // (Switch names are case-insensitive.)
+  bool HasSwitch(const std::wstring& switch_string) const;
+
+  // Returns the value associated with the given switch.  If the
+  // switch has no value or isn't present, this method returns
+  // the empty string.
+  std::wstring GetSwitchValue(const std::wstring& switch_string) const;
+
+  // Returns the number of "loose values" found in the command line.
+  // Loose values are arguments that aren't switches.
+  // (The program name is also excluded from the set of loose values.)
+  size_t GetLooseValueCount() const;
+
+  typedef std::vector<std::wstring>::const_iterator LooseValueIterator;
+
+  // Returns a const_iterator to the list of loose values.
+  LooseValueIterator GetLooseValuesBegin() const;
+
+  // Returns the end const_iterator for the list of loose values.
+  LooseValueIterator GetLooseValuesEnd() const;
+
+  // Simply returns the original command line string.
+  std::wstring command_line_string() const;
+
+  // Returns the program part of the command line string (the first item).
+  std::wstring program() const;
+
+  // An array containing the prefixes that identify an argument as
+  // a switch.
+  static const wchar_t* const kSwitchPrefixes[];
+
+  // The string that's used to separate switches from their values.
+  static const wchar_t kSwitchValueSeparator[];
+
+  // Appends the given switch string (preceded by a space and a switch
+  // prefix) to the given string.
+  static void AppendSwitch(std::wstring* command_line_string,
+                           const std::wstring& switch_string);
+
+  // Appends the given switch string (preceded by a space and a switch
+  // prefix) to the given string, with the given value attached.
+  static void AppendSwitchWithValue(std::wstring* command_line_string,
+                                    const std::wstring& switch_string,
+                                    const std::wstring& value_string);
+
+ private:
+  class Data;
+
+  // True if we are responsible for deleting our |data_| pointer.  In some cases
+  // we cache the result of parsing the command line and |data_|'s lifetime is
+  // managed by someone else (e.g., the |Singleton| class).
+  bool we_own_data_;
+
+  // A pointer to the parsed version of the command line.
+  Data* data_;
+
+  DISALLOW_EVIL_CONSTRUCTORS(CommandLine);
+};
+
+#endif  // BASE_COMMAND_LINE_H__