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- Add functions

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- Code improvements
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Stone-Red-Code
2021-11-19 20:49:55 +01:00
parent 812b780942
commit 2a7e8074ba
27 changed files with 356 additions and 156 deletions
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YesNt.Interpreter/Utilities/Evaluator.cs
+164
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using System.Text.RegularExpressions;
namespace YesNt.Interpreter.Utilities
{
internal static class Evaluator
{
public static bool? EvaluateCondition(string input)
{
string[] parts = input.Split("==");
if (parts.Length == 2)
{
string part1 = parts[0].FromSaveString().Trim();
string part2 = parts[1].FromSaveString().Trim();
return part1 == part2;
}
parts = input.Split("!=");
if (parts.Length == 2)
{
string part1 = parts[0].FromSaveString().Trim();
string part2 = parts[1].FromSaveString().Trim();
return part1 != part2;
}
parts = input.Split(">");
if (parts.Length == 2)
{
bool succ1 = parts[0].ToStandardizedNumber(out double part1);
bool succ2 = parts[1].ToStandardizedNumber(out double part2);
if (!succ1 || !succ2)
{
return false;
}
return part1 > part2;
}
parts = input.Split("<");
if (parts.Length == 2)
{
bool succ1 = parts[0].ToStandardizedNumber(out double part1);
bool succ2 = parts[1].ToStandardizedNumber(out double part2);
if (!succ1 || !succ2)
{
return false;
}
return part1 < part2;
}
parts = input.Split(">=");
if (parts.Length == 2)
{
bool succ1 = parts[0].ToStandardizedNumber(out double part1);
bool succ2 = parts[1].ToStandardizedNumber(out double part2);
if (!succ1 || !succ2)
{
return false;
}
return part1 >= part2;
}
parts = input.Split("<=");
if (parts.Length == 2)
{
bool succ1 = parts[0].ToStandardizedNumber(out double part1);
bool succ2 = parts[1].ToStandardizedNumber(out double part2);
if (!succ1 || !succ2)
{
return false;
}
return part1 <= part2;
}
return null;
}
public static string Calculate(string input, char op = '+')
{
if (input is null)
{
return null;
}
MatchCollection matches = Regex.Matches(input, @"\(([^()]+)\)");
while (matches.Count > 0)
{
for (int i = 0; i < matches.Count; i++)
{
string calc = matches[i].Value.Substring(1, matches[i].Length - 2);
string ret = Calculate(calc);
input = input.Replace(matches[i].Value, ret);
}
matches = Regex.Matches(input, @"\(([^()]+)\)");
}
string[] parts = input.Split(op);
double number = double.NaN;
foreach (string p in parts)
{
string part = p;
switch (op)
{
case '+':
part = Calculate(part, '-');
break;
case '-':
part = Calculate(part, '*');
break;
case '*':
part = Calculate(part, '/');
break;
}
if (part is null)
{
return null;
}
if (part.ToStandardizedNumber(out double num))
{
if (double.IsNaN(number))
{
number = num;
}
else
{
switch (op)
{
case '+':
number += num;
break;
case '-':
number -= num;
break;
case '*':
number *= num;
break;
case '/':
number /= num;
break;
}
}
}
else
{
return null;
}
}
return number.ToString();
}
}
}