1281 lines
43 KiB
C#
1281 lines
43 KiB
C#
using System;
|
|
using System.Collections.Generic;
|
|
using System.Globalization;
|
|
using System.Runtime.CompilerServices;
|
|
using System.Security;
|
|
using System.Text;
|
|
using System.Text.RegularExpressions;
|
|
using Godot.NativeInterop;
|
|
|
|
namespace Godot
|
|
{
|
|
public static class StringExtensions
|
|
{
|
|
private static int GetSliceCount(this string instance, string splitter)
|
|
{
|
|
if (string.IsNullOrEmpty(instance) || string.IsNullOrEmpty(splitter))
|
|
return 0;
|
|
|
|
int pos = 0;
|
|
int slices = 1;
|
|
|
|
while ((pos = instance.Find(splitter, pos, caseSensitive: true)) >= 0)
|
|
{
|
|
slices++;
|
|
pos += splitter.Length;
|
|
}
|
|
|
|
return slices;
|
|
}
|
|
|
|
private static string GetSliceCharacter(this string instance, char splitter, int slice)
|
|
{
|
|
if (!string.IsNullOrEmpty(instance) && slice >= 0)
|
|
{
|
|
int i = 0;
|
|
int prev = 0;
|
|
int count = 0;
|
|
|
|
while (true)
|
|
{
|
|
bool end = instance.Length <= i;
|
|
|
|
if (end || instance[i] == splitter)
|
|
{
|
|
if (slice == count)
|
|
{
|
|
return instance.Substring(prev, i - prev);
|
|
}
|
|
else if (end)
|
|
{
|
|
return string.Empty;
|
|
}
|
|
|
|
count++;
|
|
prev = i + 1;
|
|
}
|
|
|
|
i++;
|
|
}
|
|
}
|
|
|
|
return string.Empty;
|
|
}
|
|
|
|
/// <summary>
|
|
/// If the string is a path to a file, return the path to the file without the extension.
|
|
/// </summary>
|
|
public static string BaseName(this string instance)
|
|
{
|
|
int index = instance.LastIndexOf('.');
|
|
|
|
if (index > 0)
|
|
return instance.Substring(0, index);
|
|
|
|
return instance;
|
|
}
|
|
|
|
/// <summary>
|
|
/// Return <see langword="true"/> if the strings begins with the given string.
|
|
/// </summary>
|
|
public static bool BeginsWith(this string instance, string text)
|
|
{
|
|
return instance.StartsWith(text);
|
|
}
|
|
|
|
/// <summary>
|
|
/// Return the bigrams (pairs of consecutive letters) of this string.
|
|
/// </summary>
|
|
public static string[] Bigrams(this string instance)
|
|
{
|
|
var b = new string[instance.Length - 1];
|
|
|
|
for (int i = 0; i < b.Length; i++)
|
|
{
|
|
b[i] = instance.Substring(i, 2);
|
|
}
|
|
|
|
return b;
|
|
}
|
|
|
|
/// <summary>
|
|
/// Converts a string containing a binary number into an integer.
|
|
/// Binary strings can either be prefixed with `0b` or not,
|
|
/// and they can also start with a `-` before the optional prefix.
|
|
/// </summary>
|
|
/// <param name="instance">The string to convert.</param>
|
|
/// <returns>The converted string.</returns>
|
|
public static int BinToInt(this string instance)
|
|
{
|
|
if (instance.Length == 0)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
int sign = 1;
|
|
|
|
if (instance[0] == '-')
|
|
{
|
|
sign = -1;
|
|
instance = instance.Substring(1);
|
|
}
|
|
|
|
if (instance.StartsWith("0b"))
|
|
{
|
|
instance = instance.Substring(2);
|
|
}
|
|
|
|
return sign * Convert.ToInt32(instance, 2);
|
|
}
|
|
|
|
/// <summary>
|
|
/// Return the amount of substrings in string.
|
|
/// </summary>
|
|
public static int Count(this string instance, string what, bool caseSensitive = true, int from = 0, int to = 0)
|
|
{
|
|
if (what.Length == 0)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
int len = instance.Length;
|
|
int slen = what.Length;
|
|
|
|
if (len < slen)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
string str;
|
|
|
|
if (from >= 0 && to >= 0)
|
|
{
|
|
if (to == 0)
|
|
{
|
|
to = len;
|
|
}
|
|
else if (from >= to)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
if (from == 0 && to == len)
|
|
{
|
|
str = instance;
|
|
}
|
|
else
|
|
{
|
|
str = instance.Substring(from, to - from);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
int c = 0;
|
|
int idx;
|
|
|
|
do
|
|
{
|
|
idx = str.IndexOf(what, caseSensitive ? StringComparison.Ordinal : StringComparison.OrdinalIgnoreCase);
|
|
if (idx != -1)
|
|
{
|
|
str = str.Substring(idx + slen);
|
|
++c;
|
|
}
|
|
} while (idx != -1);
|
|
|
|
return c;
|
|
}
|
|
|
|
/// <summary>
|
|
/// Return a copy of the string with special characters escaped using the C language standard.
|
|
/// </summary>
|
|
public static string CEscape(this string instance)
|
|
{
|
|
var sb = new StringBuilder(instance);
|
|
|
|
sb.Replace("\\", "\\\\");
|
|
sb.Replace("\a", "\\a");
|
|
sb.Replace("\b", "\\b");
|
|
sb.Replace("\f", "\\f");
|
|
sb.Replace("\n", "\\n");
|
|
sb.Replace("\r", "\\r");
|
|
sb.Replace("\t", "\\t");
|
|
sb.Replace("\v", "\\v");
|
|
sb.Replace("\'", "\\'");
|
|
sb.Replace("\"", "\\\"");
|
|
sb.Replace("?", "\\?");
|
|
|
|
return sb.ToString();
|
|
}
|
|
|
|
/// <summary>
|
|
/// Return a copy of the string with escaped characters replaced by their meanings
|
|
/// according to the C language standard.
|
|
/// </summary>
|
|
public static string CUnescape(this string instance)
|
|
{
|
|
var sb = new StringBuilder(instance);
|
|
|
|
sb.Replace("\\a", "\a");
|
|
sb.Replace("\\b", "\b");
|
|
sb.Replace("\\f", "\f");
|
|
sb.Replace("\\n", "\n");
|
|
sb.Replace("\\r", "\r");
|
|
sb.Replace("\\t", "\t");
|
|
sb.Replace("\\v", "\v");
|
|
sb.Replace("\\'", "\'");
|
|
sb.Replace("\\\"", "\"");
|
|
sb.Replace("\\?", "?");
|
|
sb.Replace("\\\\", "\\");
|
|
|
|
return sb.ToString();
|
|
}
|
|
|
|
/// <summary>
|
|
/// Change the case of some letters. Replace underscores with spaces, convert all letters
|
|
/// to lowercase then capitalize first and every letter following the space character.
|
|
/// For <c>capitalize camelCase mixed_with_underscores</c> it will return
|
|
/// <c>Capitalize Camelcase Mixed With Underscores</c>.
|
|
/// </summary>
|
|
public static string Capitalize(this string instance)
|
|
{
|
|
string aux = instance.Replace("_", " ").ToLower();
|
|
var cap = string.Empty;
|
|
|
|
for (int i = 0; i < aux.GetSliceCount(" "); i++)
|
|
{
|
|
string slice = aux.GetSliceCharacter(' ', i);
|
|
if (slice.Length > 0)
|
|
{
|
|
slice = char.ToUpper(slice[0]) + slice.Substring(1);
|
|
if (i > 0)
|
|
cap += " ";
|
|
cap += slice;
|
|
}
|
|
}
|
|
|
|
return cap;
|
|
}
|
|
|
|
/// <summary>
|
|
/// Perform a case-sensitive comparison to another string, return -1 if less, 0 if equal and +1 if greater.
|
|
/// </summary>
|
|
public static int CasecmpTo(this string instance, string to)
|
|
{
|
|
return instance.CompareTo(to, caseSensitive: true);
|
|
}
|
|
|
|
/// <summary>
|
|
/// Perform a comparison to another string, return -1 if less, 0 if equal and +1 if greater.
|
|
/// </summary>
|
|
public static int CompareTo(this string instance, string to, bool caseSensitive = true)
|
|
{
|
|
if (string.IsNullOrEmpty(instance))
|
|
return string.IsNullOrEmpty(to) ? 0 : -1;
|
|
|
|
if (string.IsNullOrEmpty(to))
|
|
return 1;
|
|
|
|
int instanceIndex = 0;
|
|
int toIndex = 0;
|
|
|
|
if (caseSensitive) // Outside while loop to avoid checking multiple times, despite some code duplication.
|
|
{
|
|
while (true)
|
|
{
|
|
if (to[toIndex] == 0 && instance[instanceIndex] == 0)
|
|
return 0; // We're equal
|
|
if (instance[instanceIndex] == 0)
|
|
return -1; // If this is empty, and the other one is not, then we're less... I think?
|
|
if (to[toIndex] == 0)
|
|
return 1; // Otherwise the other one is smaller...
|
|
if (instance[instanceIndex] < to[toIndex]) // More than
|
|
return -1;
|
|
if (instance[instanceIndex] > to[toIndex]) // Less than
|
|
return 1;
|
|
|
|
instanceIndex++;
|
|
toIndex++;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
while (true)
|
|
{
|
|
if (to[toIndex] == 0 && instance[instanceIndex] == 0)
|
|
return 0; // We're equal
|
|
if (instance[instanceIndex] == 0)
|
|
return -1; // If this is empty, and the other one is not, then we're less... I think?
|
|
if (to[toIndex] == 0)
|
|
return 1; // Otherwise the other one is smaller..
|
|
if (char.ToUpper(instance[instanceIndex]) < char.ToUpper(to[toIndex])) // More than
|
|
return -1;
|
|
if (char.ToUpper(instance[instanceIndex]) > char.ToUpper(to[toIndex])) // Less than
|
|
return 1;
|
|
|
|
instanceIndex++;
|
|
toIndex++;
|
|
}
|
|
}
|
|
}
|
|
|
|
/// <summary>
|
|
/// Return <see langword="true"/> if the strings ends with the given string.
|
|
/// </summary>
|
|
public static bool EndsWith(this string instance, string text)
|
|
{
|
|
return instance.EndsWith(text);
|
|
}
|
|
|
|
/// <summary>
|
|
/// Erase <paramref name="chars"/> characters from the string starting from <paramref name="pos"/>.
|
|
/// </summary>
|
|
public static void Erase(this StringBuilder instance, int pos, int chars)
|
|
{
|
|
instance.Remove(pos, chars);
|
|
}
|
|
|
|
/// <summary>
|
|
/// If the string is a path to a file, return the extension.
|
|
/// </summary>
|
|
public static string Extension(this string instance)
|
|
{
|
|
int pos = instance.FindLast(".");
|
|
|
|
if (pos < 0)
|
|
return instance;
|
|
|
|
return instance.Substring(pos + 1);
|
|
}
|
|
|
|
/// <summary>
|
|
/// Find the first occurrence of a substring. Optionally, the search starting position can be passed.
|
|
/// </summary>
|
|
/// <returns>The starting position of the substring, or -1 if not found.</returns>
|
|
public static int Find(this string instance, string what, int from = 0, bool caseSensitive = true)
|
|
{
|
|
return instance.IndexOf(what, from,
|
|
caseSensitive ? StringComparison.Ordinal : StringComparison.OrdinalIgnoreCase);
|
|
}
|
|
|
|
/// <summary>
|
|
/// Find the first occurrence of a char. Optionally, the search starting position can be passed.
|
|
/// </summary>
|
|
/// <returns>The first instance of the char, or -1 if not found.</returns>
|
|
public static int Find(this string instance, char what, int from = 0, bool caseSensitive = true)
|
|
{
|
|
// TODO: Could be more efficient if we get a char version of `IndexOf`.
|
|
// See https://github.com/dotnet/runtime/issues/44116
|
|
return instance.IndexOf(what.ToString(), from,
|
|
caseSensitive ? StringComparison.Ordinal : StringComparison.OrdinalIgnoreCase);
|
|
}
|
|
|
|
/// <summary>Find the last occurrence of a substring.</summary>
|
|
/// <returns>The starting position of the substring, or -1 if not found.</returns>
|
|
public static int FindLast(this string instance, string what, bool caseSensitive = true)
|
|
{
|
|
return instance.FindLast(what, instance.Length - 1, caseSensitive);
|
|
}
|
|
|
|
/// <summary>Find the last occurrence of a substring specifying the search starting position.</summary>
|
|
/// <returns>The starting position of the substring, or -1 if not found.</returns>
|
|
public static int FindLast(this string instance, string what, int from, bool caseSensitive = true)
|
|
{
|
|
return instance.LastIndexOf(what, from,
|
|
caseSensitive ? StringComparison.Ordinal : StringComparison.OrdinalIgnoreCase);
|
|
}
|
|
|
|
/// <summary>
|
|
/// Find the first occurrence of a substring but search as case-insensitive.
|
|
/// Optionally, the search starting position can be passed.
|
|
/// </summary>
|
|
/// <returns>The starting position of the substring, or -1 if not found.</returns>
|
|
public static int FindN(this string instance, string what, int from = 0)
|
|
{
|
|
return instance.IndexOf(what, from, StringComparison.OrdinalIgnoreCase);
|
|
}
|
|
|
|
/// <summary>
|
|
/// If the string is a path to a file, return the base directory.
|
|
/// </summary>
|
|
public static string GetBaseDir(this string instance)
|
|
{
|
|
int basepos = instance.Find("://");
|
|
|
|
string rs;
|
|
var @base = string.Empty;
|
|
|
|
if (basepos != -1)
|
|
{
|
|
var end = basepos + 3;
|
|
rs = instance.Substring(end);
|
|
@base = instance.Substring(0, end);
|
|
}
|
|
else
|
|
{
|
|
if (instance.BeginsWith("/"))
|
|
{
|
|
rs = instance.Substring(1);
|
|
@base = "/";
|
|
}
|
|
else
|
|
{
|
|
rs = instance;
|
|
}
|
|
}
|
|
|
|
int sep = Mathf.Max(rs.FindLast("/"), rs.FindLast("\\"));
|
|
|
|
if (sep == -1)
|
|
return @base;
|
|
|
|
return @base + rs.Substr(0, sep);
|
|
}
|
|
|
|
/// <summary>
|
|
/// If the string is a path to a file, return the file and ignore the base directory.
|
|
/// </summary>
|
|
public static string GetFile(this string instance)
|
|
{
|
|
int sep = Mathf.Max(instance.FindLast("/"), instance.FindLast("\\"));
|
|
|
|
if (sep == -1)
|
|
return instance;
|
|
|
|
return instance.Substring(sep + 1);
|
|
}
|
|
|
|
/// <summary>
|
|
/// Converts the given byte array of ASCII encoded text to a string.
|
|
/// Faster alternative to <see cref="GetStringFromUTF8"/> if the
|
|
/// content is ASCII-only. Unlike the UTF-8 function this function
|
|
/// maps every byte to a character in the array. Multibyte sequences
|
|
/// will not be interpreted correctly. For parsing user input always
|
|
/// use <see cref="GetStringFromUTF8"/>.
|
|
/// </summary>
|
|
/// <param name="bytes">A byte array of ASCII characters (on the range of 0-127).</param>
|
|
/// <returns>A string created from the bytes.</returns>
|
|
public static string GetStringFromASCII(this byte[] bytes)
|
|
{
|
|
return Encoding.ASCII.GetString(bytes);
|
|
}
|
|
|
|
/// <summary>
|
|
/// Converts the given byte array of UTF-8 encoded text to a string.
|
|
/// Slower than <see cref="GetStringFromASCII"/> but supports UTF-8
|
|
/// encoded data. Use this function if you are unsure about the
|
|
/// source of the data. For user input this function
|
|
/// should always be preferred.
|
|
/// </summary>
|
|
/// <param name="bytes">A byte array of UTF-8 characters (a character may take up multiple bytes).</param>
|
|
/// <returns>A string created from the bytes.</returns>
|
|
public static string GetStringFromUTF8(this byte[] bytes)
|
|
{
|
|
return Encoding.UTF8.GetString(bytes);
|
|
}
|
|
|
|
/// <summary>
|
|
/// Hash the string and return a 32 bits unsigned integer.
|
|
/// </summary>
|
|
public static uint Hash(this string instance)
|
|
{
|
|
uint hash = 5381;
|
|
|
|
foreach (uint c in instance)
|
|
{
|
|
hash = (hash << 5) + hash + c; // hash * 33 + c
|
|
}
|
|
|
|
return hash;
|
|
}
|
|
|
|
/// <summary>
|
|
/// Returns a hexadecimal representation of this byte as a string.
|
|
/// </summary>
|
|
/// <param name="b">The byte to encode.</param>
|
|
/// <returns>The hexadecimal representation of this byte.</returns>
|
|
internal static string HexEncode(this byte b)
|
|
{
|
|
var ret = string.Empty;
|
|
|
|
for (int i = 0; i < 2; i++)
|
|
{
|
|
char c;
|
|
int lv = b & 0xF;
|
|
|
|
if (lv < 10)
|
|
{
|
|
c = (char)('0' + lv);
|
|
}
|
|
else
|
|
{
|
|
c = (char)('a' + lv - 10);
|
|
}
|
|
|
|
b >>= 4;
|
|
ret = c + ret;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
/// <summary>
|
|
/// Returns a hexadecimal representation of this byte array as a string.
|
|
/// </summary>
|
|
/// <param name="bytes">The byte array to encode.</param>
|
|
/// <returns>The hexadecimal representation of this byte array.</returns>
|
|
public static string HexEncode(this byte[] bytes)
|
|
{
|
|
var ret = string.Empty;
|
|
|
|
foreach (byte b in bytes)
|
|
{
|
|
ret += b.HexEncode();
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
/// <summary>
|
|
/// Converts a string containing a hexadecimal number into an integer.
|
|
/// Hexadecimal strings can either be prefixed with `0x` or not,
|
|
/// and they can also start with a `-` before the optional prefix.
|
|
/// </summary>
|
|
/// <param name="instance">The string to convert.</param>
|
|
/// <returns>The converted string.</returns>
|
|
public static int HexToInt(this string instance)
|
|
{
|
|
if (instance.Length == 0)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
int sign = 1;
|
|
|
|
if (instance[0] == '-')
|
|
{
|
|
sign = -1;
|
|
instance = instance.Substring(1);
|
|
}
|
|
|
|
if (instance.StartsWith("0x"))
|
|
{
|
|
instance = instance.Substring(2);
|
|
}
|
|
|
|
return sign * int.Parse(instance, NumberStyles.HexNumber);
|
|
}
|
|
|
|
/// <summary>
|
|
/// Insert a substring at a given position.
|
|
/// </summary>
|
|
public static string Insert(this string instance, int pos, string what)
|
|
{
|
|
return instance.Insert(pos, what);
|
|
}
|
|
|
|
/// <summary>
|
|
/// If the string is a path to a file or directory, return <see langword="true"/> if the path is absolute.
|
|
/// </summary>
|
|
public static bool IsAbsPath(this string instance)
|
|
{
|
|
if (string.IsNullOrEmpty(instance))
|
|
return false;
|
|
else if (instance.Length > 1)
|
|
return instance[0] == '/' || instance[0] == '\\' || instance.Contains(":/") || instance.Contains(":\\");
|
|
else
|
|
return instance[0] == '/' || instance[0] == '\\';
|
|
}
|
|
|
|
/// <summary>
|
|
/// If the string is a path to a file or directory, return <see langword="true"/> if the path is relative.
|
|
/// </summary>
|
|
public static bool IsRelPath(this string instance)
|
|
{
|
|
return !IsAbsPath(instance);
|
|
}
|
|
|
|
/// <summary>
|
|
/// Check whether this string is a subsequence of the given string.
|
|
/// </summary>
|
|
public static bool IsSubsequenceOf(this string instance, string text, bool caseSensitive = true)
|
|
{
|
|
int len = instance.Length;
|
|
|
|
if (len == 0)
|
|
return true; // Technically an empty string is subsequence of any string
|
|
|
|
if (len > text.Length)
|
|
return false;
|
|
|
|
int source = 0;
|
|
int target = 0;
|
|
|
|
while (source < len && target < text.Length)
|
|
{
|
|
bool match;
|
|
|
|
if (!caseSensitive)
|
|
{
|
|
char sourcec = char.ToLower(instance[source]);
|
|
char targetc = char.ToLower(text[target]);
|
|
match = sourcec == targetc;
|
|
}
|
|
else
|
|
{
|
|
match = instance[source] == text[target];
|
|
}
|
|
|
|
if (match)
|
|
{
|
|
source++;
|
|
if (source >= len)
|
|
return true;
|
|
}
|
|
|
|
target++;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
/// <summary>
|
|
/// Check whether this string is a subsequence of the given string, ignoring case differences.
|
|
/// </summary>
|
|
public static bool IsSubsequenceOfI(this string instance, string text)
|
|
{
|
|
return instance.IsSubsequenceOf(text, caseSensitive: false);
|
|
}
|
|
|
|
/// <summary>
|
|
/// Check whether the string contains a valid <see langword="float"/>.
|
|
/// </summary>
|
|
public static bool IsValidFloat(this string instance)
|
|
{
|
|
float f;
|
|
return float.TryParse(instance, out f);
|
|
}
|
|
|
|
/// <summary>
|
|
/// Check whether the string contains a valid color in HTML notation.
|
|
/// </summary>
|
|
public static bool IsValidHtmlColor(this string instance)
|
|
{
|
|
return Color.HtmlIsValid(instance);
|
|
}
|
|
|
|
/// <summary>
|
|
/// Check whether the string is a valid identifier. As is common in
|
|
/// programming languages, a valid identifier may contain only letters,
|
|
/// digits and underscores (_) and the first character may not be a digit.
|
|
/// </summary>
|
|
public static bool IsValidIdentifier(this string instance)
|
|
{
|
|
int len = instance.Length;
|
|
|
|
if (len == 0)
|
|
return false;
|
|
|
|
for (int i = 0; i < len; i++)
|
|
{
|
|
if (i == 0)
|
|
{
|
|
if (instance[0] >= '0' && instance[0] <= '9')
|
|
return false; // Don't start with number plz
|
|
}
|
|
|
|
bool validChar = instance[i] >= '0' &&
|
|
instance[i] <= '9' || instance[i] >= 'a' &&
|
|
instance[i] <= 'z' || instance[i] >= 'A' &&
|
|
instance[i] <= 'Z' || instance[i] == '_';
|
|
|
|
if (!validChar)
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
/// <summary>
|
|
/// Check whether the string contains a valid integer.
|
|
/// </summary>
|
|
public static bool IsValidInteger(this string instance)
|
|
{
|
|
int f;
|
|
return int.TryParse(instance, out f);
|
|
}
|
|
|
|
/// <summary>
|
|
/// Check whether the string contains a valid IP address.
|
|
/// </summary>
|
|
public static bool IsValidIPAddress(this string instance)
|
|
{
|
|
// TODO: Support IPv6 addresses
|
|
string[] ip = instance.Split(".");
|
|
|
|
if (ip.Length != 4)
|
|
return false;
|
|
|
|
for (int i = 0; i < ip.Length; i++)
|
|
{
|
|
string n = ip[i];
|
|
if (!n.IsValidInteger())
|
|
return false;
|
|
|
|
int val = n.ToInt();
|
|
if (val < 0 || val > 255)
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
/// <summary>
|
|
/// Return a copy of the string with special characters escaped using the JSON standard.
|
|
/// </summary>
|
|
public static string JSONEscape(this string instance)
|
|
{
|
|
var sb = new StringBuilder(instance);
|
|
|
|
sb.Replace("\\", "\\\\");
|
|
sb.Replace("\b", "\\b");
|
|
sb.Replace("\f", "\\f");
|
|
sb.Replace("\n", "\\n");
|
|
sb.Replace("\r", "\\r");
|
|
sb.Replace("\t", "\\t");
|
|
sb.Replace("\v", "\\v");
|
|
sb.Replace("\"", "\\\"");
|
|
|
|
return sb.ToString();
|
|
}
|
|
|
|
/// <summary>
|
|
/// Return an amount of characters from the left of the string.
|
|
/// </summary>
|
|
public static string Left(this string instance, int pos)
|
|
{
|
|
if (pos <= 0)
|
|
return string.Empty;
|
|
|
|
if (pos >= instance.Length)
|
|
return instance;
|
|
|
|
return instance.Substring(0, pos);
|
|
}
|
|
|
|
/// <summary>
|
|
/// Return the length of the string in characters.
|
|
/// </summary>
|
|
public static int Length(this string instance)
|
|
{
|
|
return instance.Length;
|
|
}
|
|
|
|
/// <summary>
|
|
/// Returns a copy of the string with characters removed from the left.
|
|
/// </summary>
|
|
/// <param name="instance">The string to remove characters from.</param>
|
|
/// <param name="chars">The characters to be removed.</param>
|
|
/// <returns>A copy of the string with characters removed from the left.</returns>
|
|
public static string LStrip(this string instance, string chars)
|
|
{
|
|
int len = instance.Length;
|
|
int beg;
|
|
|
|
for (beg = 0; beg < len; beg++)
|
|
{
|
|
if (chars.Find(instance[beg]) == -1)
|
|
{
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (beg == 0)
|
|
{
|
|
return instance;
|
|
}
|
|
|
|
return instance.Substr(beg, len - beg);
|
|
}
|
|
|
|
/// <summary>
|
|
/// Do a simple expression match, where '*' matches zero or more
|
|
/// arbitrary characters and '?' matches any single character except '.'.
|
|
/// </summary>
|
|
private static bool ExprMatch(this string instance, string expr, bool caseSensitive)
|
|
{
|
|
// case '\0':
|
|
if (expr.Length == 0)
|
|
return instance.Length == 0;
|
|
|
|
switch (expr[0])
|
|
{
|
|
case '*':
|
|
return ExprMatch(instance, expr.Substring(1), caseSensitive) || (instance.Length > 0 &&
|
|
ExprMatch(instance.Substring(1), expr, caseSensitive));
|
|
case '?':
|
|
return instance.Length > 0 && instance[0] != '.' &&
|
|
ExprMatch(instance.Substring(1), expr.Substring(1), caseSensitive);
|
|
default:
|
|
if (instance.Length == 0)
|
|
return false;
|
|
if (caseSensitive)
|
|
return instance[0] == expr[0];
|
|
return (char.ToUpper(instance[0]) == char.ToUpper(expr[0])) &&
|
|
ExprMatch(instance.Substring(1), expr.Substring(1), caseSensitive);
|
|
}
|
|
}
|
|
|
|
/// <summary>
|
|
/// Do a simple case sensitive expression match, using ? and * wildcards
|
|
/// (see <see cref="ExprMatch(string, string, bool)"/>).
|
|
/// </summary>
|
|
public static bool Match(this string instance, string expr, bool caseSensitive = true)
|
|
{
|
|
if (instance.Length == 0 || expr.Length == 0)
|
|
return false;
|
|
|
|
return instance.ExprMatch(expr, caseSensitive);
|
|
}
|
|
|
|
/// <summary>
|
|
/// Do a simple case insensitive expression match, using ? and * wildcards
|
|
/// (see <see cref="ExprMatch(string, string, bool)"/>).
|
|
/// </summary>
|
|
public static bool MatchN(this string instance, string expr)
|
|
{
|
|
if (instance.Length == 0 || expr.Length == 0)
|
|
return false;
|
|
|
|
return instance.ExprMatch(expr, caseSensitive: false);
|
|
}
|
|
|
|
/// <summary>
|
|
/// Return the MD5 hash of the string as an array of bytes.
|
|
/// </summary>
|
|
public static unsafe byte[] MD5Buffer(this string instance)
|
|
{
|
|
using godot_string instanceStr = Marshaling.mono_string_to_godot(instance);
|
|
using godot_packed_byte_array md5Buffer = default;
|
|
NativeFuncs.godotsharp_string_md5_buffer(&instanceStr, &md5Buffer);
|
|
return Marshaling.PackedByteArray_to_mono_array(&md5Buffer);
|
|
}
|
|
|
|
/// <summary>
|
|
/// Return the MD5 hash of the string as a string.
|
|
/// </summary>
|
|
public static unsafe string MD5Text(this string instance)
|
|
{
|
|
using godot_string instanceStr = Marshaling.mono_string_to_godot(instance);
|
|
using godot_string md5Text = default;
|
|
NativeFuncs.godotsharp_string_md5_text(&instanceStr, &md5Text);
|
|
return Marshaling.mono_string_from_godot(&md5Text);
|
|
}
|
|
|
|
/// <summary>
|
|
/// Perform a case-insensitive comparison to another string, return -1 if less, 0 if equal and +1 if greater.
|
|
/// </summary>
|
|
public static int NocasecmpTo(this string instance, string to)
|
|
{
|
|
return instance.CompareTo(to, caseSensitive: false);
|
|
}
|
|
|
|
/// <summary>
|
|
/// Return the character code at position <paramref name="at"/>.
|
|
/// </summary>
|
|
public static int OrdAt(this string instance, int at)
|
|
{
|
|
return instance[at];
|
|
}
|
|
|
|
/// <summary>
|
|
/// Format a number to have an exact number of <paramref name="digits"/> after the decimal point.
|
|
/// </summary>
|
|
public static string PadDecimals(this string instance, int digits)
|
|
{
|
|
int c = instance.Find(".");
|
|
|
|
if (c == -1)
|
|
{
|
|
if (digits <= 0)
|
|
return instance;
|
|
|
|
instance += ".";
|
|
c = instance.Length - 1;
|
|
}
|
|
else
|
|
{
|
|
if (digits <= 0)
|
|
return instance.Substring(0, c);
|
|
}
|
|
|
|
if (instance.Length - (c + 1) > digits)
|
|
{
|
|
instance = instance.Substring(0, c + digits + 1);
|
|
}
|
|
else
|
|
{
|
|
while (instance.Length - (c + 1) < digits)
|
|
{
|
|
instance += "0";
|
|
}
|
|
}
|
|
|
|
return instance;
|
|
}
|
|
|
|
/// <summary>
|
|
/// Format a number to have an exact number of <paramref name="digits"/> before the decimal point.
|
|
/// </summary>
|
|
public static string PadZeros(this string instance, int digits)
|
|
{
|
|
string s = instance;
|
|
int end = s.Find(".");
|
|
|
|
if (end == -1)
|
|
end = s.Length;
|
|
|
|
if (end == 0)
|
|
return s;
|
|
|
|
int begin = 0;
|
|
|
|
while (begin < end && (s[begin] < '0' || s[begin] > '9'))
|
|
{
|
|
begin++;
|
|
}
|
|
|
|
if (begin >= end)
|
|
return s;
|
|
|
|
while (end - begin < digits)
|
|
{
|
|
s = s.Insert(begin, "0");
|
|
end++;
|
|
}
|
|
|
|
return s;
|
|
}
|
|
|
|
/// <summary>
|
|
/// If the string is a path, this concatenates <paramref name="file"/> at the end of the string as a subpath.
|
|
/// E.g. <c>"this/is".PlusFile("path") == "this/is/path"</c>.
|
|
/// </summary>
|
|
public static string PlusFile(this string instance, string file)
|
|
{
|
|
if (instance.Length > 0 && instance[instance.Length - 1] == '/')
|
|
return instance + file;
|
|
return instance + "/" + file;
|
|
}
|
|
|
|
/// <summary>
|
|
/// Replace occurrences of a substring for different ones inside the string.
|
|
/// </summary>
|
|
public static string Replace(this string instance, string what, string forwhat)
|
|
{
|
|
return instance.Replace(what, forwhat);
|
|
}
|
|
|
|
/// <summary>
|
|
/// Replace occurrences of a substring for different ones inside the string, but search case-insensitive.
|
|
/// </summary>
|
|
public static string ReplaceN(this string instance, string what, string forwhat)
|
|
{
|
|
return Regex.Replace(instance, what, forwhat, RegexOptions.IgnoreCase);
|
|
}
|
|
|
|
/// <summary>
|
|
/// Perform a search for a substring, but start from the end of the string instead of the beginning.
|
|
/// </summary>
|
|
public static unsafe int RFind(this string instance, string what, int from = -1)
|
|
{
|
|
using godot_string instanceStr = Marshaling.mono_string_to_godot(instance);
|
|
using godot_string whatStr = Marshaling.mono_string_to_godot(instance);
|
|
return NativeFuncs.godotsharp_string_rfind(&instanceStr, &whatStr, from);
|
|
}
|
|
|
|
/// <summary>
|
|
/// Perform a search for a substring, but start from the end of the string instead of the beginning.
|
|
/// Also search case-insensitive.
|
|
/// </summary>
|
|
public static unsafe int RFindN(this string instance, string what, int from = -1)
|
|
{
|
|
using godot_string instanceStr = Marshaling.mono_string_to_godot(instance);
|
|
using godot_string whatStr = Marshaling.mono_string_to_godot(instance);
|
|
return NativeFuncs.godotsharp_string_rfindn(&instanceStr, &whatStr, from);
|
|
}
|
|
|
|
/// <summary>
|
|
/// Return the right side of the string from a given position.
|
|
/// </summary>
|
|
public static string Right(this string instance, int pos)
|
|
{
|
|
if (pos >= instance.Length)
|
|
return instance;
|
|
|
|
if (pos < 0)
|
|
return string.Empty;
|
|
|
|
return instance.Substring(pos, instance.Length - pos);
|
|
}
|
|
|
|
/// <summary>
|
|
/// Returns a copy of the string with characters removed from the right.
|
|
/// </summary>
|
|
/// <param name="instance">The string to remove characters from.</param>
|
|
/// <param name="chars">The characters to be removed.</param>
|
|
/// <returns>A copy of the string with characters removed from the right.</returns>
|
|
public static string RStrip(this string instance, string chars)
|
|
{
|
|
int len = instance.Length;
|
|
int end;
|
|
|
|
for (end = len - 1; end >= 0; end--)
|
|
{
|
|
if (chars.Find(instance[end]) == -1)
|
|
{
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (end == len - 1)
|
|
{
|
|
return instance;
|
|
}
|
|
|
|
return instance.Substr(0, end + 1);
|
|
}
|
|
|
|
public static unsafe byte[] SHA256Buffer(this string instance)
|
|
{
|
|
using godot_string instanceStr = Marshaling.mono_string_to_godot(instance);
|
|
using godot_packed_byte_array sha256Buffer = default;
|
|
NativeFuncs.godotsharp_string_sha256_buffer(&instanceStr, &sha256Buffer);
|
|
return Marshaling.PackedByteArray_to_mono_array(&sha256Buffer);
|
|
}
|
|
|
|
/// <summary>
|
|
/// Return the SHA-256 hash of the string as a string.
|
|
/// </summary>
|
|
public static unsafe string SHA256Text(this string instance)
|
|
{
|
|
using godot_string instanceStr = Marshaling.mono_string_to_godot(instance);
|
|
using godot_string sha256Text = default;
|
|
NativeFuncs.godotsharp_string_sha256_text(&instanceStr, &sha256Text);
|
|
return Marshaling.mono_string_from_godot(&sha256Text);
|
|
}
|
|
|
|
/// <summary>
|
|
/// Return the similarity index of the text compared to this string.
|
|
/// 1 means totally similar and 0 means totally dissimilar.
|
|
/// </summary>
|
|
public static float Similarity(this string instance, string text)
|
|
{
|
|
if (instance == text)
|
|
{
|
|
// Equal strings are totally similar
|
|
return 1.0f;
|
|
}
|
|
|
|
if (instance.Length < 2 || text.Length < 2)
|
|
{
|
|
// No way to calculate similarity without a single bigram
|
|
return 0.0f;
|
|
}
|
|
|
|
string[] sourceBigrams = instance.Bigrams();
|
|
string[] targetBigrams = text.Bigrams();
|
|
|
|
int sourceSize = sourceBigrams.Length;
|
|
int targetSize = targetBigrams.Length;
|
|
|
|
float sum = sourceSize + targetSize;
|
|
float inter = 0;
|
|
|
|
for (int i = 0; i < sourceSize; i++)
|
|
{
|
|
for (int j = 0; j < targetSize; j++)
|
|
{
|
|
if (sourceBigrams[i] == targetBigrams[j])
|
|
{
|
|
inter++;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
return 2.0f * inter / sum;
|
|
}
|
|
|
|
/// <summary>
|
|
/// Split the string by a divisor string, return an array of the substrings.
|
|
/// Example "One,Two,Three" will return ["One","Two","Three"] if split by ",".
|
|
/// </summary>
|
|
public static string[] Split(this string instance, string divisor, bool allowEmpty = true)
|
|
{
|
|
return instance.Split(new[] { divisor },
|
|
allowEmpty ? StringSplitOptions.None : StringSplitOptions.RemoveEmptyEntries);
|
|
}
|
|
|
|
/// <summary>
|
|
/// Split the string in floats by using a divisor string, return an array of the substrings.
|
|
/// Example "1,2.5,3" will return [1,2.5,3] if split by ",".
|
|
/// </summary>
|
|
public static float[] SplitFloats(this string instance, string divisor, bool allowEmpty = true)
|
|
{
|
|
var ret = new List<float>();
|
|
int from = 0;
|
|
int len = instance.Length;
|
|
|
|
while (true)
|
|
{
|
|
int end = instance.Find(divisor, from, caseSensitive: true);
|
|
if (end < 0)
|
|
end = len;
|
|
if (allowEmpty || end > from)
|
|
ret.Add(float.Parse(instance.Substring(from)));
|
|
if (end == len)
|
|
break;
|
|
|
|
from = end + divisor.Length;
|
|
}
|
|
|
|
return ret.ToArray();
|
|
}
|
|
|
|
private static readonly char[] _nonPrintable =
|
|
{
|
|
(char)00, (char)01, (char)02, (char)03, (char)04, (char)05,
|
|
(char)06, (char)07, (char)08, (char)09, (char)10, (char)11,
|
|
(char)12, (char)13, (char)14, (char)15, (char)16, (char)17,
|
|
(char)18, (char)19, (char)20, (char)21, (char)22, (char)23,
|
|
(char)24, (char)25, (char)26, (char)27, (char)28, (char)29,
|
|
(char)30, (char)31, (char)32
|
|
};
|
|
|
|
/// <summary>
|
|
/// Return a copy of the string stripped of any non-printable character at the beginning and the end.
|
|
/// The optional arguments are used to toggle stripping on the left and right edges respectively.
|
|
/// </summary>
|
|
public static string StripEdges(this string instance, bool left = true, bool right = true)
|
|
{
|
|
if (left)
|
|
{
|
|
if (right)
|
|
return instance.Trim(_nonPrintable);
|
|
return instance.TrimStart(_nonPrintable);
|
|
}
|
|
|
|
return instance.TrimEnd(_nonPrintable);
|
|
}
|
|
|
|
/// <summary>
|
|
/// Return part of the string from the position <paramref name="from"/>, with length <paramref name="len"/>.
|
|
/// </summary>
|
|
public static string Substr(this string instance, int from, int len)
|
|
{
|
|
int max = instance.Length - from;
|
|
return instance.Substring(from, len > max ? max : len);
|
|
}
|
|
|
|
/// <summary>
|
|
/// Convert the String (which is a character array) to PackedByteArray (which is an array of bytes).
|
|
/// The conversion is speeded up in comparison to <see cref="ToUTF8(string)"/> with the assumption
|
|
/// that all the characters the String contains are only ASCII characters.
|
|
/// </summary>
|
|
public static byte[] ToAscii(this string instance)
|
|
{
|
|
return Encoding.ASCII.GetBytes(instance);
|
|
}
|
|
|
|
/// <summary>
|
|
/// Convert a string, containing a decimal number, into a <see langword="float" />.
|
|
/// </summary>
|
|
public static float ToFloat(this string instance)
|
|
{
|
|
return float.Parse(instance);
|
|
}
|
|
|
|
/// <summary>
|
|
/// Convert a string, containing an integer number, into an <see langword="int" />.
|
|
/// </summary>
|
|
public static int ToInt(this string instance)
|
|
{
|
|
return int.Parse(instance);
|
|
}
|
|
|
|
/// <summary>
|
|
/// Return the string converted to lowercase.
|
|
/// </summary>
|
|
public static string ToLower(this string instance)
|
|
{
|
|
return instance.ToLower();
|
|
}
|
|
|
|
/// <summary>
|
|
/// Return the string converted to uppercase.
|
|
/// </summary>
|
|
public static string ToUpper(this string instance)
|
|
{
|
|
return instance.ToUpper();
|
|
}
|
|
|
|
/// <summary>
|
|
/// Convert the String (which is an array of characters) to PackedByteArray (which is an array of bytes).
|
|
/// The conversion is a bit slower than <see cref="ToAscii(string)"/>, but supports all UTF-8 characters.
|
|
/// Therefore, you should prefer this function over <see cref="ToAscii(string)"/>.
|
|
/// </summary>
|
|
public static byte[] ToUTF8(this string instance)
|
|
{
|
|
return Encoding.UTF8.GetBytes(instance);
|
|
}
|
|
|
|
/// <summary>
|
|
/// Decodes a string in URL encoded format. This is meant to
|
|
/// decode parameters in a URL when receiving an HTTP request.
|
|
/// This mostly wraps around `System.Uri.UnescapeDataString()`,
|
|
/// but also handles `+`.
|
|
/// See <see cref="URIEncode"/> for encoding.
|
|
/// </summary>
|
|
/// <param name="instance">The string to decode.</param>
|
|
/// <returns>The unescaped string.</returns>
|
|
public static string URIDecode(this string instance)
|
|
{
|
|
return Uri.UnescapeDataString(instance.Replace("+", "%20"));
|
|
}
|
|
|
|
/// <summary>
|
|
/// Encodes a string to URL friendly format. This is meant to
|
|
/// encode parameters in a URL when sending an HTTP request.
|
|
/// This wraps around `System.Uri.EscapeDataString()`.
|
|
/// See <see cref="URIDecode"/> for decoding.
|
|
/// </summary>
|
|
/// <param name="instance">The string to encode.</param>
|
|
/// <returns>The escaped string.</returns>
|
|
public static string URIEncode(this string instance)
|
|
{
|
|
return Uri.EscapeDataString(instance);
|
|
}
|
|
|
|
/// <summary>
|
|
/// Return a copy of the string with special characters escaped using the XML standard.
|
|
/// </summary>
|
|
public static string XMLEscape(this string instance)
|
|
{
|
|
return SecurityElement.Escape(instance);
|
|
}
|
|
|
|
/// <summary>
|
|
/// Return a copy of the string with escaped characters replaced by their meanings
|
|
/// according to the XML standard.
|
|
/// </summary>
|
|
public static string XMLUnescape(this string instance)
|
|
{
|
|
return SecurityElement.FromString(instance).Text;
|
|
}
|
|
}
|
|
}
|