[8924] | 1 | #region License Information
|
---|
| 2 | /* HeuristicLab
|
---|
[16956] | 3 | * Copyright (C) 2002-2019 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
|
---|
[8924] | 4 | *
|
---|
| 5 | * This file is part of HeuristicLab.
|
---|
| 6 | *
|
---|
| 7 | * HeuristicLab is free software: you can redistribute it and/or modify
|
---|
| 8 | * it under the terms of the GNU General Public License as published by
|
---|
| 9 | * the Free Software Foundation, either version 3 of the License, or
|
---|
| 10 | * (at your option) any later version.
|
---|
| 11 | *
|
---|
| 12 | * HeuristicLab is distributed in the hope that it will be useful,
|
---|
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
|
---|
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
---|
| 15 | * GNU General Public License for more details.
|
---|
| 16 | *
|
---|
| 17 | * You should have received a copy of the GNU General Public License
|
---|
| 18 | * along with HeuristicLab. If not, see <http://www.gnu.org/licenses/>.
|
---|
| 19 | */
|
---|
| 20 | #endregion
|
---|
| 21 |
|
---|
| 22 | using System;
|
---|
[7228] | 23 | using System.Collections.Generic;
|
---|
| 24 | using System.Globalization;
|
---|
| 25 | using System.Linq;
|
---|
[8778] | 26 | using System.Text;
|
---|
[7228] | 27 | using System.Text.RegularExpressions;
|
---|
| 28 | using HeuristicLab.Common;
|
---|
| 29 | using HeuristicLab.Core;
|
---|
| 30 | using HeuristicLab.Data;
|
---|
[16956] | 31 | using HEAL.Attic;
|
---|
[7228] | 32 |
|
---|
| 33 | namespace HeuristicLab.Optimization {
|
---|
| 34 |
|
---|
[16956] | 35 | [StorableType("6C41AF6F-5F02-4510-B1B5-222651C4021B")]
|
---|
[7228] | 36 | public class Calculator : IDeepCloneable {
|
---|
| 37 |
|
---|
| 38 | #region Fields & Properties
|
---|
| 39 |
|
---|
| 40 | private List<string> tokens;
|
---|
| 41 |
|
---|
| 42 | [Storable]
|
---|
| 43 | public string Formula {
|
---|
[8778] | 44 | get { return tokens == null ? string.Empty : string.Join(" ", tokens); }
|
---|
[7228] | 45 | set { tokens = Tokenize(value).ToList(); }
|
---|
| 46 | }
|
---|
| 47 |
|
---|
| 48 | private static readonly Regex TokenRegex =
|
---|
| 49 | new Regex(@"""(\\""|[^""])*""|'(\\'|[^'])*'|[^\s]+");
|
---|
| 50 |
|
---|
| 51 | #endregion
|
---|
| 52 |
|
---|
| 53 | #region Construction & Cloning
|
---|
| 54 |
|
---|
| 55 | [StorableConstructor]
|
---|
[16956] | 56 | protected Calculator(StorableConstructorFlag _) { }
|
---|
[7228] | 57 | public Calculator() { }
|
---|
| 58 | protected Calculator(Calculator original, Cloner cloner) {
|
---|
| 59 | cloner.RegisterClonedObject(original, this);
|
---|
| 60 | if (original.tokens != null)
|
---|
| 61 | tokens = original.tokens.ToList();
|
---|
| 62 | }
|
---|
| 63 | public IDeepCloneable Clone(Cloner cloner) {
|
---|
| 64 | return new Calculator(this, cloner);
|
---|
| 65 | }
|
---|
| 66 | public object Clone() {
|
---|
| 67 | return Clone(new Cloner());
|
---|
| 68 | }
|
---|
| 69 | #endregion
|
---|
| 70 |
|
---|
| 71 | private static IEnumerable<string> Tokenize(string s) {
|
---|
| 72 | return TokenRegex.Matches(s).Cast<Match>().Select(m => m.Value);
|
---|
| 73 | }
|
---|
| 74 |
|
---|
| 75 | public IItem GetValue(IDictionary<string, IItem> variables) {
|
---|
| 76 | var stack = new Stack<object>();
|
---|
| 77 | int i = 0;
|
---|
| 78 | try {
|
---|
[8778] | 79 | for (; i < tokens.Count; i++) {
|
---|
[7228] | 80 | var token = tokens[i];
|
---|
| 81 | double d;
|
---|
| 82 | if (TryParse(token, out d)) {
|
---|
| 83 | stack.Push(d);
|
---|
| 84 | } else if (token.StartsWith("\"")) {
|
---|
| 85 | stack.Push(GetVariableValue(variables, token.Substring(1, token.Length - 2).Replace("\\\"", "\"")));
|
---|
| 86 | } else if (token.StartsWith("'")) {
|
---|
[8778] | 87 | stack.Push(token.Substring(1, token.Length - 2).Replace("\\'", "'"));
|
---|
[7228] | 88 | } else {
|
---|
| 89 | Apply(token, stack, variables);
|
---|
| 90 | }
|
---|
| 91 | }
|
---|
[12091] | 92 | } catch (Exception x) {
|
---|
[7228] | 93 | throw new Exception(string.Format(
|
---|
| 94 | "Calculation of '{1}'{0}failed at token #{2}: {3} {0}current stack is: {0}{4}", Environment.NewLine,
|
---|
[8778] | 95 | Formula, i, TokenWithContext(tokens, i, 3),
|
---|
[7228] | 96 | string.Join(Environment.NewLine, stack.Select(AsString))),
|
---|
| 97 | x);
|
---|
| 98 | }
|
---|
| 99 | if (stack.Count != 1)
|
---|
| 100 | throw new Exception(
|
---|
| 101 | string.Format("Invalid final evaluation stack size {0} (should be 1) in formula '{1}'",
|
---|
| 102 | stack.Count, Formula));
|
---|
| 103 | var result = stack.Pop();
|
---|
| 104 | if (result is string) return new StringValue((string)result);
|
---|
[12091] | 105 | if (result is int) return new IntValue((int)result);
|
---|
[7228] | 106 | if (result is double) return new DoubleValue((double)result);
|
---|
| 107 | if (result is bool) return new BoolValue((bool)result);
|
---|
| 108 | return null;
|
---|
| 109 | }
|
---|
| 110 |
|
---|
| 111 | private string TokenWithContext(List<string> tokens, int i, int context) {
|
---|
| 112 | var sb = new StringBuilder();
|
---|
[8778] | 113 | if (i > context + 1)
|
---|
[7228] | 114 | sb.Append("... ");
|
---|
| 115 | int prefix = Math.Max(0, i - context);
|
---|
| 116 | sb.Append(string.Join(" ", tokens.GetRange(prefix, i - prefix)));
|
---|
| 117 | sb.Append(" ---> ").Append(tokens[i]).Append(" <--- ");
|
---|
| 118 | int postfix = Math.Min(tokens.Count, i + 1 + context);
|
---|
| 119 | sb.Append(string.Join(" ", tokens.GetRange(i + 1, postfix - (i + 1))));
|
---|
| 120 | if (postfix < tokens.Count)
|
---|
| 121 | sb.Append(" ...");
|
---|
| 122 | return sb.ToString();
|
---|
| 123 | }
|
---|
| 124 |
|
---|
| 125 |
|
---|
| 126 | private static void Apply(string token, Stack<object> stack, IDictionary<string, IItem> variables) {
|
---|
| 127 | switch (token) {
|
---|
[8778] | 128 | case "null": stack.Push(null); break;
|
---|
| 129 | case "true": stack.Push(true); break;
|
---|
[7228] | 130 | case "false": stack.Push(false); break;
|
---|
| 131 |
|
---|
| 132 | case "drop": stack.Pop(); break;
|
---|
| 133 | case "dup": stack.Push(stack.Peek()); break;
|
---|
| 134 | case "swap":
|
---|
| 135 | var top = stack.Pop();
|
---|
| 136 | var next = stack.Pop();
|
---|
| 137 | stack.Push(top);
|
---|
| 138 | stack.Push(next);
|
---|
| 139 | break;
|
---|
| 140 |
|
---|
[12091] | 141 | case "log": Apply(stack, x => Math.Log(Convert.ToDouble(x))); break;
|
---|
| 142 | case "+": Apply(stack, (x, y) => Convert.ToDouble(x) + Convert.ToDouble(y)); break;
|
---|
| 143 | case "-": Apply(stack, (x, y) => Convert.ToDouble(x) - Convert.ToDouble(y)); break;
|
---|
| 144 | case "*": Apply(stack, (x, y) => Convert.ToDouble(x) * Convert.ToDouble(y)); break;
|
---|
| 145 | case "/": Apply(stack, (x, y) => Convert.ToDouble(x) / Convert.ToDouble(y)); break;
|
---|
| 146 | case "^": Apply(stack, (x, y) => Math.Pow(Convert.ToDouble(x), Convert.ToDouble(y))); break;
|
---|
| 147 | case "<": Apply(stack, (x, y) => Convert.ToDouble(x) < Convert.ToDouble(y)); break;
|
---|
| 148 | case ">": Apply(stack, (x, y) => Convert.ToDouble(x) > Convert.ToDouble(y)); break;
|
---|
[7228] | 149 |
|
---|
[12091] | 150 | case "toint": Apply(stack, x => Convert.ToInt32(x)); break;
|
---|
| 151 | case "todouble": Apply(stack, x => Convert.ToDouble(x)); break;
|
---|
| 152 |
|
---|
[12096] | 153 | case "[]": Apply(stack, (a, i) => GetArrayValueAtIndex(a, Convert.ToInt32(i))); break;
|
---|
| 154 |
|
---|
[7228] | 155 | case "==": Apply(stack, (x, y) => Equal(x, y)); break;
|
---|
[12091] | 156 | case "not": Apply(stack, x => !Convert.ToBoolean(x)); break;
|
---|
[7228] | 157 | case "isnull": Apply(stack, x => x == null); break;
|
---|
[12091] | 158 | case "if": Apply(stack, (then, else_, cond) => Convert.ToBoolean(cond) ? then : else_); break;
|
---|
[7228] | 159 |
|
---|
[12091] | 160 | case "ismatch": Apply(stack, (s, p) => new Regex(Convert.ToString(p)).IsMatch(Convert.ToString(s))); break;
|
---|
| 161 | case "rename": Apply(stack, (s, p, r) => new Regex(Convert.ToString(p)).Replace(Convert.ToString(s), Convert.ToString(r))); break;
|
---|
[7228] | 162 |
|
---|
| 163 | default: stack.Push(GetVariableValue(variables, token)); break;
|
---|
| 164 | }
|
---|
| 165 | }
|
---|
| 166 |
|
---|
| 167 | #region Auxiliary Functions
|
---|
| 168 |
|
---|
| 169 | #region IItem value conversion
|
---|
| 170 | private static object GetIntValue(IItem value) {
|
---|
| 171 | var v = value as IntValue;
|
---|
| 172 | if (v != null) return (double)v.Value;
|
---|
| 173 | return null;
|
---|
| 174 | }
|
---|
| 175 |
|
---|
| 176 | private static object GetDoubleValue(IItem value) {
|
---|
| 177 | var v = value as DoubleValue;
|
---|
| 178 | if (v != null) return v.Value;
|
---|
| 179 | return null;
|
---|
| 180 | }
|
---|
| 181 |
|
---|
| 182 | private static object GetBoolValue(IItem value) {
|
---|
| 183 | var v = value as BoolValue;
|
---|
| 184 | if (v != null) return v.Value;
|
---|
| 185 | return null;
|
---|
| 186 | }
|
---|
| 187 |
|
---|
[12096] | 188 | private static object GetArrayValue(IItem value) {
|
---|
| 189 | if (value is IntArray || value is DoubleArray || value is BoolArray || value is StringArray)
|
---|
| 190 | return value;
|
---|
| 191 | return null;
|
---|
| 192 | }
|
---|
| 193 |
|
---|
[7228] | 194 | private static object GetVariableValue(IDictionary<string, IItem> variables, string name) {
|
---|
| 195 | if (variables.ContainsKey(name)) {
|
---|
| 196 | var item = variables[name];
|
---|
| 197 | return
|
---|
| 198 | GetIntValue(item) ??
|
---|
| 199 | GetDoubleValue(item) ??
|
---|
| 200 | GetBoolValue(item) ??
|
---|
[12096] | 201 | GetArrayValue(item) ??
|
---|
[7228] | 202 | item.ToString();
|
---|
| 203 | }
|
---|
| 204 | return null;
|
---|
| 205 | }
|
---|
[12096] | 206 |
|
---|
| 207 | private static object GetArrayValueAtIndex(object array, int index) {
|
---|
| 208 | if (array is IntArray)
|
---|
| 209 | return ((IntArray)array)[index];
|
---|
| 210 | if (array is DoubleArray)
|
---|
| 211 | return ((DoubleArray)array)[index];
|
---|
| 212 | if (array is BoolArray)
|
---|
| 213 | return ((BoolArray)array)[index];
|
---|
| 214 | if (array is StringArray)
|
---|
| 215 | return ((StringArray)array)[index];
|
---|
| 216 | throw new NotSupportedException(string.Format("Type {0} is not a supported array type", array.GetType().Name));
|
---|
| 217 | }
|
---|
[7228] | 218 | #endregion
|
---|
| 219 |
|
---|
| 220 | #region variadic equality
|
---|
[12096] | 221 | private static bool Equal(object a, object b) { return EqualIntegerNumber(a, b) || EqualFloatingNumber(a, b) || EqualBool(a, b) || EqualString(a, b) || a == b; }
|
---|
| 222 | private static bool EqualIntegerNumber(object a, object b) { return a is int && b is int && (int)a == (int)b; }
|
---|
| 223 | private static bool EqualFloatingNumber(object a, object b) { return a is double && b is double && (double)a == (double)b; }
|
---|
[7228] | 224 | private static bool EqualBool(object a, object b) { return a is bool && b is bool && (bool)a == (bool)b; }
|
---|
| 225 | private static bool EqualString(object a, object b) { return a is string && b is string && ((string)a).Equals((string)b); }
|
---|
| 226 | #endregion
|
---|
| 227 |
|
---|
| 228 | #region stack calculation
|
---|
| 229 | private static void Apply(Stack<object> stack, Func<object, object> func) {
|
---|
| 230 | if (stack.Count < 1)
|
---|
| 231 | throw new InvalidOperationException("Stack is empty");
|
---|
| 232 | var a = stack.Pop();
|
---|
| 233 | try {
|
---|
| 234 | stack.Push(func(a));
|
---|
[12091] | 235 | } catch (Exception) {
|
---|
[7228] | 236 | stack.Push(a);
|
---|
| 237 | throw;
|
---|
| 238 | }
|
---|
| 239 | }
|
---|
| 240 |
|
---|
| 241 | private static void Apply(Stack<object> stack, Func<object, object, object> func) {
|
---|
| 242 | if (stack.Count < 2)
|
---|
| 243 | throw new InvalidOperationException("Stack contains less than two elements");
|
---|
| 244 | var b = stack.Pop();
|
---|
| 245 | var a = stack.Pop();
|
---|
| 246 | try {
|
---|
| 247 | stack.Push(func(a, b));
|
---|
[12091] | 248 | } catch (Exception) {
|
---|
[7228] | 249 | stack.Push(b);
|
---|
| 250 | stack.Push(a);
|
---|
| 251 | throw;
|
---|
| 252 | }
|
---|
| 253 | }
|
---|
| 254 |
|
---|
| 255 | private static void Apply(Stack<object> stack, Func<object, object, object, object> func) {
|
---|
| 256 | if (stack.Count < 3)
|
---|
| 257 | throw new InvalidOperationException("Stack contains less than three elements");
|
---|
| 258 | var c = stack.Pop();
|
---|
| 259 | var b = stack.Pop();
|
---|
| 260 | var a = stack.Pop();
|
---|
| 261 | try {
|
---|
| 262 | stack.Push(func(a, b, c));
|
---|
[12091] | 263 | } catch (Exception) {
|
---|
[7228] | 264 | stack.Push(a);
|
---|
| 265 | stack.Push(b);
|
---|
| 266 | stack.Push(c);
|
---|
| 267 | throw;
|
---|
| 268 | }
|
---|
| 269 | }
|
---|
| 270 | #endregion
|
---|
| 271 |
|
---|
| 272 | private static bool TryParse(string token, out double d) {
|
---|
| 273 | return double.TryParse(token,
|
---|
| 274 | NumberStyles.AllowDecimalPoint |
|
---|
| 275 | NumberStyles.AllowExponent |
|
---|
| 276 | NumberStyles.AllowLeadingSign, CultureInfo.InvariantCulture, out d);
|
---|
| 277 | }
|
---|
| 278 |
|
---|
| 279 | private static string AsString(object o) {
|
---|
| 280 | if (o == null) return "null";
|
---|
| 281 | if (o is string) return string.Format("'{0}'", o);
|
---|
| 282 | return o.ToString();
|
---|
| 283 | }
|
---|
| 284 |
|
---|
| 285 | #endregion
|
---|
| 286 | }
|
---|
| 287 | }
|
---|