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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,71 +1,93 @@ | ||
| using sdmap.Functional; | ||
| using System; | ||
| using System.Collections.Generic; | ||
| using System.Globalization; | ||
| using System.Linq; | ||
| using System.Text.RegularExpressions; | ||
| using System.Threading.Tasks; | ||
|
|
||
| namespace sdmap.Utils | ||
| { | ||
| public class StringUtil | ||
| { | ||
| public static Result<string> Parse(string input) | ||
| { | ||
| if (string.IsNullOrWhiteSpace(input)) | ||
| return Result.Fail<string>($"string literial must not be empty."); | ||
|
|
||
| if (input.Length <= 2) | ||
| return Result.Fail<string>($"string literial length must > 2."); | ||
|
|
||
| if (input.First() != input.Last()) | ||
| return Result.Fail<string>($"string literial's first and last char must be the same."); | ||
|
|
||
| var firstChar = input[0]; | ||
| var escapedChar = Details.GetEscapedChar(firstChar); | ||
| if (escapedChar.IsFailure) | ||
| return Result.Fail<string>(escapedChar.Error); | ||
|
|
||
| var inner = input.Substring(1, input.Length - 2); | ||
| return Result.Ok(Details.EscapeNoCheck(inner, escapedChar.Value)); | ||
| } | ||
|
|
||
| public class Details | ||
| { | ||
| public static Result<char> GetEscapedChar(char ch) | ||
| { | ||
| if (ch == '\'') | ||
| { | ||
| return Result.Ok('"'); | ||
| } | ||
| else if (ch == '"') | ||
| { | ||
| return Result.Ok('\''); | ||
| } | ||
| else | ||
| { | ||
| return Result.Fail<char>($"char {ch} not escappable."); | ||
| } | ||
| } | ||
|
|
||
| public static string EscapeNoCheck(string input, char escapeChar) | ||
| { | ||
| var unicodeRegex = new Regex(@"\\[uU]([0-9A-Fa-f]{4})"); | ||
|
|
||
| var result = input | ||
| .Replace(@"\\", @"\") | ||
| .Replace(@"\/", @"/") | ||
| .Replace(@"\t", "\t") | ||
| .Replace(@"\b", "\b") | ||
| .Replace(@"\f", "\f") | ||
| .Replace(@"\n", "\n") | ||
| .Replace(@"\r", "\r") | ||
| .Replace(@"\t", "\t") | ||
| .Replace($@"\{escapeChar}", escapeChar.ToString()); | ||
|
|
||
| return unicodeRegex.Replace(result, match => | ||
| ((char)int.Parse(match.Value.Substring(2), NumberStyles.HexNumber)).ToString()); | ||
| } | ||
| } | ||
| } | ||
| } | ||
| using sdmap.Functional; | ||
| using System; | ||
| using System.Collections.Generic; | ||
| using System.Globalization; | ||
| using System.Linq; | ||
| using System.Text.RegularExpressions; | ||
| using System.Threading.Tasks; | ||
|
|
||
| namespace sdmap.Utils | ||
| { | ||
| public class StringUtil | ||
| { | ||
| public static Result<string> Parse(string input) | ||
| { | ||
| if (string.IsNullOrWhiteSpace(input)) | ||
| return Result.Fail<string>($"string literial must not be empty."); | ||
|
|
||
| if (input[0] == '@') | ||
| { | ||
| return AtStringParse(input); | ||
| } | ||
| else | ||
| { | ||
| return RegularStringParse(input); | ||
| } | ||
| } | ||
|
|
||
| private static Result<string> RegularStringParse(string input) | ||
| { | ||
| if (input.Length < 2) | ||
| return Result.Fail<string>($"string literial length must > 2."); | ||
|
|
||
| if (input.First() != input.Last()) | ||
| return Result.Fail<string>($"string literial's first and last char must be the same."); | ||
|
|
||
| var firstChar = input[0]; | ||
| var escapedChar = Details.GetEscapedChar(firstChar); | ||
| if (escapedChar.IsFailure) | ||
| return Result.Fail<string>(escapedChar.Error); | ||
|
|
||
| var inner = input.Substring(1, input.Length - 2); | ||
| return Result.Ok(Details.EscapeNoCheck(inner, escapedChar.Value)); | ||
| } | ||
|
|
||
| private static Result<string> AtStringParse(string input) | ||
| { | ||
| if (input.Length < 3) | ||
| return Result.Fail<string>($"AtString literial length must > 3."); | ||
|
|
||
| var inner = input.Substring(2, input.Length - 3); | ||
| var escaped = inner.Replace("\"\"", "\""); | ||
| return Result.Ok(escaped); | ||
| } | ||
|
|
||
| public class Details | ||
| { | ||
| public static Result<char> GetEscapedChar(char ch) | ||
| { | ||
| if (ch == '\'') | ||
| { | ||
| return Result.Ok('"'); | ||
| } | ||
| else if (ch == '"') | ||
| { | ||
| return Result.Ok('\''); | ||
| } | ||
| else | ||
| { | ||
| return Result.Fail<char>($"char {ch} not escappable."); | ||
| } | ||
| } | ||
|
|
||
| public static string EscapeNoCheck(string input, char escapeChar) | ||
| { | ||
| var unicodeRegex = new Regex(@"\\[uU]([0-9A-Fa-f]{4})"); | ||
|
|
||
| var result = input | ||
| .Replace(@"\\", @"\") | ||
| .Replace(@"\/", @"/") | ||
| .Replace(@"\t", "\t") | ||
| .Replace(@"\b", "\b") | ||
| .Replace(@"\f", "\f") | ||
| .Replace(@"\n", "\n") | ||
| .Replace(@"\r", "\r") | ||
| .Replace(@"\t", "\t") | ||
| .Replace($@"\{escapeChar}", escapeChar.ToString()); | ||
|
|
||
| return unicodeRegex.Replace(result, match => | ||
| ((char)int.Parse(match.Value.Substring(2), NumberStyles.HexNumber)).ToString()); | ||
| } | ||
| } | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,46 @@ | ||
| using System; | ||
| using System.Collections.Generic; | ||
| using System.Linq; | ||
| using System.Threading.Tasks; | ||
| using Xunit; | ||
|
|
||
| using static sdmap.Parser.G4.SdmapLexer; | ||
|
|
||
| namespace sdmap.test.LexerTest | ||
| { | ||
| public class StringTest : LexerTestBase | ||
| { | ||
| [Fact] | ||
| public void String1() | ||
| { | ||
| var tokens = GetAllTokens("\"Test\""); | ||
| Assert.Equal(1, tokens.Count); | ||
| Assert.Equal(STRING, tokens[0].Type); | ||
| } | ||
|
|
||
| [Fact] | ||
| public void String2() | ||
| { | ||
| var tokens = GetAllTokens("'Test'"); | ||
| Assert.Equal(1, tokens.Count); | ||
| Assert.Equal(STRING, tokens[0].Type); | ||
| } | ||
|
|
||
| [Fact] | ||
| public void EmptyStringIsOk() | ||
| { | ||
| var tokens = GetAllTokens("''"); | ||
| Assert.Equal(1, tokens.Count); | ||
| Assert.Equal(STRING, tokens[0].Type); | ||
| } | ||
|
|
||
| [Fact] | ||
| public void AtString() | ||
| { | ||
| var tokens = GetAllTokens(@"@""Hel\/lo"""); | ||
| Assert.Equal(1, tokens.Count); | ||
| Assert.Equal(STRING, tokens[0].Type); | ||
| Assert.Equal(@"@""Hel\/lo""", tokens[0].Text); | ||
| } | ||
| } | ||
| } |
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