| static private UnescapeText ( string input ) : string | ||
| input | string | |
| return | string | |
public void Escape()
{
// Escape sequences.
Assert.AreEqual("\\000\\001\\a\\b\\f\\n\\r\\t\\v\\\\\\'\\\"",
TextFormat.EscapeBytes(Bytes("\0\u0001\u0007\b\f\n\r\t\v\\\'\"")));
Assert.AreEqual("\\000\\001\\a\\b\\f\\n\\r\\t\\v\\\\\\'\\\"",
TextFormat.EscapeText("\0\u0001\u0007\b\f\n\r\t\v\\\'\""));
Assert.AreEqual(Bytes("\0\u0001\u0007\b\f\n\r\t\v\\\'\""),
TextFormat.UnescapeBytes("\\000\\001\\a\\b\\f\\n\\r\\t\\v\\\\\\'\\\""));
Assert.AreEqual("\0\u0001\u0007\b\f\n\r\t\v\\\'\"",
TextFormat.UnescapeText("\\000\\001\\a\\b\\f\\n\\r\\t\\v\\\\\\'\\\""));
// Unicode handling.
Assert.AreEqual("\\341\\210\\264", TextFormat.EscapeText("\u1234"));
Assert.AreEqual("\\341\\210\\264", TextFormat.EscapeBytes(Bytes(0xe1, 0x88, 0xb4)));
Assert.AreEqual("\u1234", TextFormat.UnescapeText("\\341\\210\\264"));
Assert.AreEqual(Bytes(0xe1, 0x88, 0xb4), TextFormat.UnescapeBytes("\\341\\210\\264"));
Assert.AreEqual("\u1234", TextFormat.UnescapeText("\\xe1\\x88\\xb4"));
Assert.AreEqual(Bytes(0xe1, 0x88, 0xb4), TextFormat.UnescapeBytes("\\xe1\\x88\\xb4"));
// Errors.
AssertFormatException(() => TextFormat.UnescapeText("\\x"));
AssertFormatException(() => TextFormat.UnescapeText("\\z"));
AssertFormatException(() => TextFormat.UnescapeText("\\"));
}
/// <summary>
/// If the next token is a string, consume it and return its (unescaped) value.
/// Otherwise, throw a FormatException.
/// </summary>
public string ConsumeString()
{
char quote = currentToken.Length > 0 ? currentToken[0] : '\0';
if (quote != '\"' && quote != '\'')
{
throw CreateFormatException("Expected string.");
}
if (currentToken.Length < 2 ||
currentToken[currentToken.Length - 1] != quote)
{
throw CreateFormatException("String missing ending quote.");
}
try
{
string escaped = currentToken.Substring(1, currentToken.Length - 2);
string result = TextFormat.UnescapeText(escaped);
NextToken();
return(result);
}
catch (FormatException e)
{
throw CreateFormatException(e.Message);
}
}
