354 lines
12 KiB
C#
354 lines
12 KiB
C#
#region License
|
|
// Copyright (c) 2007 James Newton-King
|
|
//
|
|
// Permission is hereby granted, free of charge, to any person
|
|
// obtaining a copy of this software and associated documentation
|
|
// files (the "Software"), to deal in the Software without
|
|
// restriction, including without limitation the rights to use,
|
|
// copy, modify, merge, publish, distribute, sublicense, and/or sell
|
|
// copies of the Software, and to permit persons to whom the
|
|
// Software is furnished to do so, subject to the following
|
|
// conditions:
|
|
//
|
|
// The above copyright notice and this permission notice shall be
|
|
// included in all copies or substantial portions of the Software.
|
|
//
|
|
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
|
|
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
|
|
// OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
|
|
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
|
|
// HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
|
|
// WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
|
|
// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
|
|
// OTHER DEALINGS IN THE SOFTWARE.
|
|
#endregion
|
|
|
|
using System;
|
|
using System.Collections.Generic;
|
|
using System.IO;
|
|
using System.Text;
|
|
using System.Globalization;
|
|
using System.Diagnostics.CodeAnalysis;
|
|
#if !HAVE_LINQ
|
|
using LC.Newtonsoft.Json.Utilities.LinqBridge;
|
|
#else
|
|
using System.Linq;
|
|
#endif
|
|
using LC.Newtonsoft.Json.Serialization;
|
|
|
|
namespace LC.Newtonsoft.Json.Utilities
|
|
{
|
|
internal static class StringUtils
|
|
{
|
|
public const string CarriageReturnLineFeed = "\r\n";
|
|
public const string Empty = "";
|
|
public const char CarriageReturn = '\r';
|
|
public const char LineFeed = '\n';
|
|
public const char Tab = '\t';
|
|
|
|
public static bool IsNullOrEmpty([NotNullWhen(false)] string? value)
|
|
{
|
|
return string.IsNullOrEmpty(value);
|
|
}
|
|
|
|
public static string FormatWith(this string format, IFormatProvider provider, object? arg0)
|
|
{
|
|
return format.FormatWith(provider, new object?[] { arg0 });
|
|
}
|
|
|
|
public static string FormatWith(this string format, IFormatProvider provider, object? arg0, object? arg1)
|
|
{
|
|
return format.FormatWith(provider, new object?[] { arg0, arg1 });
|
|
}
|
|
|
|
public static string FormatWith(this string format, IFormatProvider provider, object? arg0, object? arg1, object? arg2)
|
|
{
|
|
return format.FormatWith(provider, new object?[] { arg0, arg1, arg2 });
|
|
}
|
|
|
|
public static string FormatWith(this string format, IFormatProvider provider, object? arg0, object? arg1, object? arg2, object? arg3)
|
|
{
|
|
return format.FormatWith(provider, new object?[] { arg0, arg1, arg2, arg3 });
|
|
}
|
|
|
|
private static string FormatWith(this string format, IFormatProvider provider, params object?[] args)
|
|
{
|
|
// leave this a private to force code to use an explicit overload
|
|
// avoids stack memory being reserved for the object array
|
|
ValidationUtils.ArgumentNotNull(format, nameof(format));
|
|
|
|
return string.Format(provider, format, args);
|
|
}
|
|
|
|
/// <summary>
|
|
/// Determines whether the string is all white space. Empty string will return <c>false</c>.
|
|
/// </summary>
|
|
/// <param name="s">The string to test whether it is all white space.</param>
|
|
/// <returns>
|
|
/// <c>true</c> if the string is all white space; otherwise, <c>false</c>.
|
|
/// </returns>
|
|
public static bool IsWhiteSpace(string s)
|
|
{
|
|
if (s == null)
|
|
{
|
|
throw new ArgumentNullException(nameof(s));
|
|
}
|
|
|
|
if (s.Length == 0)
|
|
{
|
|
return false;
|
|
}
|
|
|
|
for (int i = 0; i < s.Length; i++)
|
|
{
|
|
if (!char.IsWhiteSpace(s[i]))
|
|
{
|
|
return false;
|
|
}
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
public static StringWriter CreateStringWriter(int capacity)
|
|
{
|
|
StringBuilder sb = new StringBuilder(capacity);
|
|
StringWriter sw = new StringWriter(sb, CultureInfo.InvariantCulture);
|
|
|
|
return sw;
|
|
}
|
|
|
|
public static void ToCharAsUnicode(char c, char[] buffer)
|
|
{
|
|
buffer[0] = '\\';
|
|
buffer[1] = 'u';
|
|
buffer[2] = MathUtils.IntToHex((c >> 12) & '\x000f');
|
|
buffer[3] = MathUtils.IntToHex((c >> 8) & '\x000f');
|
|
buffer[4] = MathUtils.IntToHex((c >> 4) & '\x000f');
|
|
buffer[5] = MathUtils.IntToHex(c & '\x000f');
|
|
}
|
|
|
|
public static TSource ForgivingCaseSensitiveFind<TSource>(this IEnumerable<TSource> source, Func<TSource, string> valueSelector, string testValue)
|
|
{
|
|
if (source == null)
|
|
{
|
|
throw new ArgumentNullException(nameof(source));
|
|
}
|
|
if (valueSelector == null)
|
|
{
|
|
throw new ArgumentNullException(nameof(valueSelector));
|
|
}
|
|
|
|
IEnumerable<TSource> caseInsensitiveResults = source.Where(s => string.Equals(valueSelector(s), testValue, StringComparison.OrdinalIgnoreCase));
|
|
if (caseInsensitiveResults.Count() <= 1)
|
|
{
|
|
return caseInsensitiveResults.SingleOrDefault();
|
|
}
|
|
else
|
|
{
|
|
// multiple results returned. now filter using case sensitivity
|
|
IEnumerable<TSource> caseSensitiveResults = source.Where(s => string.Equals(valueSelector(s), testValue, StringComparison.Ordinal));
|
|
return caseSensitiveResults.SingleOrDefault();
|
|
}
|
|
}
|
|
|
|
public static string ToCamelCase(string s)
|
|
{
|
|
if (StringUtils.IsNullOrEmpty(s) || !char.IsUpper(s[0]))
|
|
{
|
|
return s;
|
|
}
|
|
|
|
char[] chars = s.ToCharArray();
|
|
|
|
for (int i = 0; i < chars.Length; i++)
|
|
{
|
|
if (i == 1 && !char.IsUpper(chars[i]))
|
|
{
|
|
break;
|
|
}
|
|
|
|
bool hasNext = (i + 1 < chars.Length);
|
|
if (i > 0 && hasNext && !char.IsUpper(chars[i + 1]))
|
|
{
|
|
// if the next character is a space, which is not considered uppercase
|
|
// (otherwise we wouldn't be here...)
|
|
// we want to ensure that the following:
|
|
// 'FOO bar' is rewritten as 'foo bar', and not as 'foO bar'
|
|
// The code was written in such a way that the first word in uppercase
|
|
// ends when if finds an uppercase letter followed by a lowercase letter.
|
|
// now a ' ' (space, (char)32) is considered not upper
|
|
// but in that case we still want our current character to become lowercase
|
|
if (char.IsSeparator(chars[i + 1]))
|
|
{
|
|
chars[i] = ToLower(chars[i]);
|
|
}
|
|
|
|
break;
|
|
}
|
|
|
|
chars[i] = ToLower(chars[i]);
|
|
}
|
|
|
|
return new string(chars);
|
|
}
|
|
|
|
private static char ToLower(char c)
|
|
{
|
|
#if HAVE_CHAR_TO_STRING_WITH_CULTURE
|
|
c = char.ToLower(c, CultureInfo.InvariantCulture);
|
|
#else
|
|
c = char.ToLowerInvariant(c);
|
|
#endif
|
|
return c;
|
|
}
|
|
|
|
public static string ToSnakeCase(string s) => ToSeparatedCase(s, '_');
|
|
|
|
public static string ToKebabCase(string s) => ToSeparatedCase(s, '-');
|
|
|
|
private enum SeparatedCaseState
|
|
{
|
|
Start,
|
|
Lower,
|
|
Upper,
|
|
NewWord
|
|
}
|
|
|
|
private static string ToSeparatedCase(string s, char separator)
|
|
{
|
|
if (StringUtils.IsNullOrEmpty(s))
|
|
{
|
|
return s;
|
|
}
|
|
|
|
StringBuilder sb = new StringBuilder();
|
|
SeparatedCaseState state = SeparatedCaseState.Start;
|
|
|
|
for (int i = 0; i < s.Length; i++)
|
|
{
|
|
if (s[i] == ' ')
|
|
{
|
|
if (state != SeparatedCaseState.Start)
|
|
{
|
|
state = SeparatedCaseState.NewWord;
|
|
}
|
|
}
|
|
else if (char.IsUpper(s[i]))
|
|
{
|
|
switch (state)
|
|
{
|
|
case SeparatedCaseState.Upper:
|
|
bool hasNext = (i + 1 < s.Length);
|
|
if (i > 0 && hasNext)
|
|
{
|
|
char nextChar = s[i + 1];
|
|
if (!char.IsUpper(nextChar) && nextChar != separator)
|
|
{
|
|
sb.Append(separator);
|
|
}
|
|
}
|
|
break;
|
|
case SeparatedCaseState.Lower:
|
|
case SeparatedCaseState.NewWord:
|
|
sb.Append(separator);
|
|
break;
|
|
}
|
|
|
|
char c;
|
|
#if HAVE_CHAR_TO_LOWER_WITH_CULTURE
|
|
c = char.ToLower(s[i], CultureInfo.InvariantCulture);
|
|
#else
|
|
c = char.ToLowerInvariant(s[i]);
|
|
#endif
|
|
sb.Append(c);
|
|
|
|
state = SeparatedCaseState.Upper;
|
|
}
|
|
else if (s[i] == separator)
|
|
{
|
|
sb.Append(separator);
|
|
state = SeparatedCaseState.Start;
|
|
}
|
|
else
|
|
{
|
|
if (state == SeparatedCaseState.NewWord)
|
|
{
|
|
sb.Append(separator);
|
|
}
|
|
|
|
sb.Append(s[i]);
|
|
state = SeparatedCaseState.Lower;
|
|
}
|
|
}
|
|
|
|
return sb.ToString();
|
|
}
|
|
|
|
public static bool IsHighSurrogate(char c)
|
|
{
|
|
#if HAVE_UNICODE_SURROGATE_DETECTION
|
|
return char.IsHighSurrogate(c);
|
|
#else
|
|
return (c >= 55296 && c <= 56319);
|
|
#endif
|
|
}
|
|
|
|
public static bool IsLowSurrogate(char c)
|
|
{
|
|
#if HAVE_UNICODE_SURROGATE_DETECTION
|
|
return char.IsLowSurrogate(c);
|
|
#else
|
|
return (c >= 56320 && c <= 57343);
|
|
#endif
|
|
}
|
|
|
|
public static bool StartsWith(this string source, char value)
|
|
{
|
|
return (source.Length > 0 && source[0] == value);
|
|
}
|
|
|
|
public static bool EndsWith(this string source, char value)
|
|
{
|
|
return (source.Length > 0 && source[source.Length - 1] == value);
|
|
}
|
|
|
|
public static string Trim(this string s, int start, int length)
|
|
{
|
|
// References: https://referencesource.microsoft.com/#mscorlib/system/string.cs,2691
|
|
// https://referencesource.microsoft.com/#mscorlib/system/string.cs,1226
|
|
if (s == null)
|
|
{
|
|
throw new ArgumentNullException();
|
|
}
|
|
if (start < 0)
|
|
{
|
|
throw new ArgumentOutOfRangeException(nameof(start));
|
|
}
|
|
if (length < 0)
|
|
{
|
|
throw new ArgumentOutOfRangeException(nameof(length));
|
|
}
|
|
int end = start + length - 1;
|
|
if (end >= s.Length)
|
|
{
|
|
throw new ArgumentOutOfRangeException(nameof(length));
|
|
}
|
|
for (; start < end; start++)
|
|
{
|
|
if (!char.IsWhiteSpace(s[start]))
|
|
{
|
|
break;
|
|
}
|
|
}
|
|
for (; end >= start; end--)
|
|
{
|
|
if (!char.IsWhiteSpace(s[end]))
|
|
{
|
|
break;
|
|
}
|
|
}
|
|
return s.Substring(start, end - start + 1);
|
|
}
|
|
}
|
|
} |