#region Copyright notice and license | |
// Protocol Buffers - Google's data interchange format | |
// Copyright 2008 Google Inc. All rights reserved. | |
// http://github.com/jskeet/dotnet-protobufs/ | |
// Original C++/Java/Python code: | |
// http://code.google.com/p/protobuf/ | |
// | |
// 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. | |
#endregion | |
using System; | |
using System.Text.RegularExpressions; | |
namespace Google.ProtocolBuffers | |
{ | |
/// <summary> | |
/// Helpers for converting names to pascal case etc. | |
/// </summary> | |
public class NameHelpers | |
{ | |
/// <summary> | |
/// All characters that are not alpha-numeric | |
/// </summary> | |
private static readonly Regex NonAlphaNumericCharacters = new Regex(@"[^a-zA-Z0-9]+"); | |
/// <summary> | |
/// Matches lower-case character that follow either an underscore, or a number | |
/// </summary> | |
private static readonly Regex UnderscoreOrNumberWithLowerCase = new Regex(@"[0-9_][a-z]"); | |
/// <summary> | |
/// Removes non alpha numeric characters while capitalizing letters that follow | |
/// a number or underscore. The first letter is always upper case. | |
/// </summary> | |
public static string UnderscoresToPascalCase(string input) | |
{ | |
string name = UnderscoresToUpperCase(input); | |
// Pascal case always begins with upper-case letter | |
if (Char.IsLower(name[0])) | |
{ | |
char[] chars = name.ToCharArray(); | |
chars[0] = char.ToUpper(chars[0]); | |
return new string(chars); | |
} | |
return name; | |
} | |
/// <summary> | |
/// Removes non alpha numeric characters while capitalizing letters that follow | |
/// a number or underscore. The first letter is always lower case. | |
/// </summary> | |
public static string UnderscoresToCamelCase(string input) | |
{ | |
string name = UnderscoresToUpperCase(input); | |
// Camel case always begins with lower-case letter | |
if (Char.IsUpper(name[0])) | |
{ | |
char[] chars = name.ToCharArray(); | |
chars[0] = char.ToLower(chars[0]); | |
return new string(chars); | |
} | |
return name; | |
} | |
/// <summary> | |
/// Capitalizes any characters following an '_' or a number '0' - '9' and removes | |
/// all non alpha-numeric characters. If the resulting string begins with a number | |
/// an '_' will be prefixed. | |
/// </summary> | |
private static string UnderscoresToUpperCase(string input) | |
{ | |
string name = UnderscoreOrNumberWithLowerCase.Replace(input, x => x.Value.ToUpper()); | |
name = NonAlphaNumericCharacters.Replace(name, String.Empty); | |
if (name.Length == 0) | |
{ | |
throw new ArgumentException(String.Format("The field name '{0}' is invalid.", input)); | |
} | |
// Fields can not start with a number | |
if (Char.IsNumber(name[0])) | |
{ | |
name = '_' + name; | |
} | |
return name; | |
} | |
internal static string StripProto(string text) | |
{ | |
if (!StripSuffix(ref text, ".protodevel")) | |
{ | |
StripSuffix(ref text, ".proto"); | |
} | |
return text; | |
} | |
/// <summary> | |
/// Attempts to strip a suffix from a string, returning whether | |
/// or not the suffix was actually present. | |
/// </summary> | |
public static bool StripSuffix(ref string text, string suffix) | |
{ | |
if (text.EndsWith(suffix)) | |
{ | |
text = text.Substring(0, text.Length - suffix.Length); | |
return true; | |
} | |
return false; | |
} | |
} | |
} |