1 | namespace HeuristicLab.Problems.ProgramSynthesis.Push.Expressions {
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2 | using System;
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3 | using System.Linq;
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4 |
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5 | using Attributes;
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6 | using Interpreter;
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7 | using Stack;
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8 |
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9 | [PushExpression(StackTypes.String, "STRING.FROMINTEGER", StackTypes.Integer)]
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10 | public class StringFromIntegerExpression : StatelessExpression {
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11 | public override bool Eval(IInternalPushInterpreter interpreter) {
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12 | if (interpreter.IntegerStack.IsEmpty)
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13 | return false;
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14 |
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15 | var value = interpreter.IntegerStack.Pop();
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16 | interpreter.StringStack.Push(value.ToString());
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17 | return true;
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18 | }
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19 | }
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20 |
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21 | [PushExpression(StackTypes.String, "STRING.FROMFLOAT", StackTypes.Float)]
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22 | public class StringFromFloatExpression : StatelessExpression {
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23 | public override bool Eval(IInternalPushInterpreter interpreter) {
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24 | if (interpreter.FloatStack.IsEmpty)
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25 | return false;
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26 |
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27 | var value = interpreter.FloatStack.Pop();
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28 | interpreter.StringStack.Push(value.ToString());
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29 | return true;
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30 | }
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31 | }
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32 |
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33 | [PushExpression(StackTypes.String, "STRING.FROMBOOLEAN", StackTypes.Boolean)]
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34 | public class StringFromBooleanExpression : StatelessExpression {
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35 | public override bool Eval(IInternalPushInterpreter interpreter) {
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36 | if (interpreter.BooleanStack.IsEmpty)
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37 | return false;
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38 |
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39 | var value = interpreter.BooleanStack.Pop();
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40 | interpreter.StringStack.Push(value.ToString());
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41 | return true;
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42 | }
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43 | }
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44 |
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45 | [PushExpression(StackTypes.String, "STRING.FROMCHAR", StackTypes.Char)]
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46 | public class StringFromCharExpression : StatelessExpression {
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47 | public override bool Eval(IInternalPushInterpreter interpreter) {
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48 | if (interpreter.CharStack.IsEmpty)
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49 | return false;
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50 |
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51 | var value = interpreter.CharStack.Pop();
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52 | interpreter.StringStack.Push(value.ToString());
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53 | return true;
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54 | }
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55 | }
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56 |
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57 | [PushExpression(StackTypes.String, "STRING.CONCAT")]
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58 | public class StringConcatExpression : StatelessExpression {
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59 | public override bool Eval(IInternalPushInterpreter interpreter) {
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60 | if (interpreter.StringStack.Count < 2 ||
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61 | interpreter.StringStack.Top.Length + interpreter.StringStack.ReverseElementAt(1).Length >= interpreter.Configuration.MaxStringLength)
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62 | return false;
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63 |
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64 | var str = interpreter.StringStack.Pop();
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65 | interpreter.StringStack.SetTop(str + interpreter.StringStack.Top);
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66 | return true;
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67 | }
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68 | }
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69 |
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70 | /// <summary>
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71 | /// Conj char onto string
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72 | /// </summary>
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73 | [PushExpression(StackTypes.String, "STRING.CONJCHAR", StackTypes.Char)]
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74 | public class StringConjCharExpression : StatelessExpression {
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75 | public override bool Eval(IInternalPushInterpreter interpreter) {
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76 | if (interpreter.StringStack.IsEmpty ||
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77 | interpreter.CharStack.IsEmpty ||
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78 | interpreter.StringStack.Top.Length + 1 >= interpreter.Configuration.MaxStringLength)
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79 | return false;
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80 |
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81 | var c = interpreter.CharStack.Pop();
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82 | interpreter.StringStack.SetTop(interpreter.StringStack.Top + c);
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83 | return true;
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84 | }
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85 | }
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86 |
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87 | [PushExpression(StackTypes.String, "STRING.TAKE", StackTypes.Integer)]
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88 | public class StringTakeExpression : StatelessExpression {
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89 | public override bool Eval(IInternalPushInterpreter interpreter) {
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90 | if (interpreter.StringStack.IsEmpty ||
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91 | interpreter.IntegerStack.IsEmpty)
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92 | return false;
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93 |
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94 | var value = interpreter.IntegerStack.Pop();
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95 |
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96 | if (value < 0) {
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97 | return true;
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98 | }
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99 |
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100 | var str = interpreter.StringStack.Top;
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101 |
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102 | if (str.Length > 0) {
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103 | value = Math.Min(str.Length - 1, value);
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104 | interpreter.StringStack.SetTop(str.Substring(0, (int)value));
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105 | }
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106 |
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107 | return true;
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108 | }
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109 | }
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110 |
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111 | [PushExpression(StackTypes.String, "STRING.SUBSTRING", StackTypes.Integer)]
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112 | public class StringSubstringExpression : StatelessExpression {
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113 | public override bool Eval(IInternalPushInterpreter interpreter) {
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114 | if (interpreter.StringStack.IsEmpty ||
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115 | interpreter.IntegerStack.Count < 2)
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116 | return false;
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117 |
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118 | var str = interpreter.StringStack.Top;
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119 | var values = interpreter.IntegerStack.Pop(2);
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120 | var first = Math.Min(str.Length - 1, Math.Max(values[0], 0));
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121 | var second = Math.Min(str.Length - 1, Math.Max(values[1], first));
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122 | var length = second - first;
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123 |
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124 | if (length > 0)
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125 | interpreter.StringStack.SetTop(str.Substring((int)first, (int)length));
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126 |
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127 | return true;
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128 | }
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129 | }
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130 |
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131 | [PushExpression(StackTypes.String, "STRING.FIRST")]
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132 | public class StringFirstExpression : StatelessExpression {
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133 | public override bool Eval(IInternalPushInterpreter interpreter) {
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134 | if (interpreter.StringStack.IsEmpty ||
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135 | interpreter.StringStack.Top.Length == 0)
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136 | return false;
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137 |
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138 | interpreter.StringStack.SetTop(interpreter.StringStack.Top[0].ToString());
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139 | return true;
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140 | }
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141 | }
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142 |
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143 |
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144 | [PushExpression(StackTypes.String, "STRING.LAST")]
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145 | public class StringLastExpression : StatelessExpression {
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146 | public override bool Eval(IInternalPushInterpreter interpreter) {
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147 | if (interpreter.StringStack.IsEmpty ||
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148 | interpreter.StringStack.Top.Length == 0)
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149 | return false;
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150 |
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151 | var str = interpreter.StringStack.Top;
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152 | var c = str[str.Length - 1].ToString();
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153 | interpreter.StringStack.SetTop(c);
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154 | return true;
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155 | }
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156 | }
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157 |
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158 | [PushExpression(StackTypes.String, "STRING.NTH", StackTypes.Integer)]
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159 | public class StringNthExpression : StatelessExpression {
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160 | public override bool Eval(IInternalPushInterpreter interpreter) {
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161 | if (interpreter.StringStack.IsEmpty ||
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162 | interpreter.IntegerStack.IsEmpty ||
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163 | interpreter.StringStack.Top.Length == 0)
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164 | return false;
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165 |
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166 | var str = interpreter.StringStack.Top;
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167 | var index = str.Length == 1 ? 0 : (int)Math.Abs(interpreter.IntegerStack.Pop() % (str.Length - 1));
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168 | var c = str[index].ToString();
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169 | interpreter.StringStack.SetTop(c);
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170 | return true;
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171 | }
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172 | }
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173 |
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174 | [PushExpression(StackTypes.String, "STRING.REST")]
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175 | public class StringRestExpression : StatelessExpression {
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176 | public override bool Eval(IInternalPushInterpreter interpreter) {
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177 | if (interpreter.StringStack.IsEmpty ||
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178 | interpreter.StringStack.Top.Length == 0)
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179 | return false;
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180 |
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181 | var str = interpreter.StringStack.Top;
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182 | interpreter.StringStack.SetTop(str.Length == 1 ? string.Empty : str.Substring(1, str.Length - 1));
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183 | return true;
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184 | }
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185 | }
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186 |
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187 | [PushExpression(StackTypes.String, "STRING.BUTLAST")]
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188 | public class StringButLastExpression : StatelessExpression {
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189 | public override bool Eval(IInternalPushInterpreter interpreter) {
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190 | if (interpreter.StringStack.IsEmpty ||
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191 | interpreter.StringStack.Top.Length == 0)
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192 | return false;
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193 |
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194 | var str = interpreter.StringStack.Top;
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195 | interpreter.StringStack.SetTop(str.Length == 1 ? string.Empty : str.Substring(0, str.Length - 1));
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196 | return true;
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197 | }
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198 | }
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199 |
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200 | [PushExpression(StackTypes.String, "STRING.LENGTH", StackTypes.Integer)]
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201 | public class StringLengthExpression : StatelessExpression {
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202 | public override bool Eval(IInternalPushInterpreter interpreter) {
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203 | if (interpreter.StringStack.IsEmpty)
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204 | return false;
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205 |
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206 | var str = interpreter.StringStack.Pop();
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207 | interpreter.IntegerStack.Push(str.Length);
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208 | return true;
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209 | }
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210 | }
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211 |
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212 | [PushExpression(StackTypes.String, "STRING.REVERSE")]
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213 | public class StringReverseExpression : StatelessExpression {
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214 | public override bool Eval(IInternalPushInterpreter interpreter) {
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215 | if (interpreter.StringStack.IsEmpty)
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216 | return false;
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217 |
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218 | interpreter.StringStack.SetTop(interpreter.StringStack.Top.Reverse().ToString());
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219 | return true;
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220 | }
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221 | }
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222 |
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223 | [PushExpression(StackTypes.String, "STRING.PARSETOCHARS")]
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224 | public class StringParseToCharsExpression : StatelessExpression {
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225 | public override bool Eval(IInternalPushInterpreter interpreter) {
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226 | if (interpreter.StringStack.IsEmpty)
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227 | return false;
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228 |
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229 | if (interpreter.StringStack.Top.Length == 0) {
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230 | interpreter.StringStack.Pop();
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231 | return true;
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232 | }
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233 |
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234 | var str = interpreter.StringStack.Top;
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235 | interpreter.StringStack.SetTop(str[0].ToString());
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236 |
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237 | if (str.Length > 1) {
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238 | var chars = new string[str.Length - 1];
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239 | for (var i = 0; i < str.Length - 1; i++) {
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240 | chars[i] = str[i + 1].ToString();
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241 | }
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242 |
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243 | interpreter.StringStack.Push(chars);
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244 | }
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245 |
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246 | return true;
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247 | }
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248 | }
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249 |
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250 | [PushExpression(StackTypes.String, "STRING.SPLIT")]
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251 | public class StringSplitExpression : StatelessExpression {
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252 | public override bool Eval(IInternalPushInterpreter interpreter) {
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253 | if (interpreter.StringStack.IsEmpty)
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254 | return false;
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255 |
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256 | var words = interpreter.StringStack.Top.Trim().Split();
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257 |
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258 | if (words.Length == 0)
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259 | return false;
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260 |
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261 | interpreter.StringStack.SetTop(words[0]);
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262 |
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263 | if (words.Length > 1)
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264 | interpreter.StringStack.Push(words, 1);
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265 |
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266 | return true;
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267 | }
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268 | }
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269 |
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270 | /// <summary>
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271 | /// True if top string is empty
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272 | /// </summary>
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273 |
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274 | [PushExpression(StackTypes.String, "STRING.EMPTYSTRING", StackTypes.Boolean)]
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275 | public class StringEmptyStringExpression : StatelessExpression {
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276 | public override bool Eval(IInternalPushInterpreter interpreter) {
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277 | if (interpreter.StringStack.IsEmpty)
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278 | return false;
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279 |
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280 | var str = interpreter.StringStack.Pop();
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281 | interpreter.BooleanStack.Push(str.Length == 0);
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282 | return true;
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283 | }
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284 | }
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285 |
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286 | /// <summary>
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287 | /// True if top string is a substring of second string; false otherwise
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288 | /// </summary>
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289 | [PushExpression(StackTypes.String, "STRING.CONTAINS", StackTypes.Boolean)]
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290 | public class StringContainsExpression : StatelessExpression {
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291 | public override bool Eval(IInternalPushInterpreter interpreter) {
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292 | if (interpreter.StringStack.Count < 2)
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293 | return false;
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294 |
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295 | var strings = interpreter.StringStack.Pop(2);
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296 | interpreter.BooleanStack.Push(strings[0].IndexOf(strings[1], StringComparison.Ordinal) >= 0);
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297 | return true;
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298 | }
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299 | }
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300 |
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301 | /// <summary>
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302 | /// True if the top char is in the top string
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303 | /// </summary>
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304 | [PushExpression(StackTypes.String, "STRING.CONTAINSCHAR", StackTypes.Boolean | StackTypes.Char)]
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305 | public class StringContainsCharExpression : StatelessExpression {
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306 | public override bool Eval(IInternalPushInterpreter interpreter) {
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307 | if (interpreter.StringStack.IsEmpty ||
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308 | interpreter.CharStack.IsEmpty)
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309 | return false;
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310 |
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311 | var str = interpreter.StringStack.Pop();
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312 | var c = interpreter.CharStack.Pop();
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313 |
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314 | interpreter.BooleanStack.Push(str.IndexOf(c) >= 0);
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315 | return true;
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316 | }
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317 | }
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318 |
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319 | /// <summary>
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320 | /// Puts on the integer stack the index of the top char in the top string
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321 | /// </summary>
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322 | [PushExpression(StackTypes.String, "STRING.INDEXOFCHAR", StackTypes.Integer | StackTypes.Char)]
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323 | public class StringIndexOfCharExpression : StatelessExpression {
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324 | public override bool Eval(IInternalPushInterpreter interpreter) {
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325 | if (interpreter.StringStack.IsEmpty ||
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326 | interpreter.CharStack.IsEmpty)
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327 | return false;
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328 |
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329 | var str = interpreter.StringStack.Pop();
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330 | var c = interpreter.CharStack.Pop();
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331 |
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332 | interpreter.IntegerStack.Push(str.IndexOf(c));
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333 | return true;
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334 | }
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335 | }
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336 |
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337 | /// <summary>
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338 | /// The number of times the top char is in the top string
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339 | /// </summary>
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340 | [PushExpression(StackTypes.String, "STRING.OCCURENCESOFCHAR", StackTypes.Integer | StackTypes.Char)]
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341 | public class StringOccurrencesOfCharExpression : StatelessExpression {
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342 | public override bool Eval(IInternalPushInterpreter interpreter) {
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343 | if (interpreter.StringStack.IsEmpty ||
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344 | interpreter.CharStack.IsEmpty)
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345 | return false;
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346 |
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347 | var str = interpreter.StringStack.Pop();
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348 | var c = interpreter.CharStack.Pop();
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349 |
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350 | var count = 0;
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351 | for (var i = 0; i < str.Length; i++)
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352 | if (str[i] == c) count++;
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353 |
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354 | interpreter.IntegerStack.Push(count);
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355 | return true;
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356 | }
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357 | }
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358 |
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359 | /// <summary>
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360 | /// In third string on stack, replaces second string with first string
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361 | /// </summary>
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362 | [PushExpression(StackTypes.String, "STRING.REPLACE")]
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363 | public class StringReplaceExpression : StatelessExpression {
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364 | public override bool Eval(IInternalPushInterpreter interpreter) {
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365 | if (interpreter.StringStack.Count < 3)
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366 | return false;
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367 |
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368 | var strings = interpreter.StringStack.Pop(2);
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369 |
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370 | if (strings[0].Length == 0 || strings[1].Length == 0)
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371 | interpreter.StringStack.SetTop(strings[0]);
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372 | else {
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373 | var result = strings[0].Replace(strings[1], interpreter.StringStack.Top);
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374 | interpreter.StringStack.SetTop(result);
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375 | }
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376 |
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377 | return true;
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378 | }
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379 | }
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380 |
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381 | /// <summary>
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382 | /// In third string on stack, replaces first occurence of second string with first string
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383 | /// </summary>
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384 | [PushExpression(StackTypes.String, "STRING.REPLACEFIRST")]
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385 | public class StringReplaceLastExpression : StatelessExpression {
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386 | public override bool Eval(IInternalPushInterpreter interpreter) {
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387 | if (interpreter.StringStack.Count < 3)
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388 | return false;
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389 |
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390 | var strings = interpreter.StringStack.Pop(2);
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391 |
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392 | var pos = strings[0].IndexOf(strings[1], StringComparison.Ordinal);
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393 |
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394 | if (pos < 0)
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395 | return true;
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396 |
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397 | var result = strings[0].Substring(0, pos) +
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398 | interpreter.StringStack.Top +
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399 | strings[0].Substring(pos + strings[1].Length);
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400 |
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401 | interpreter.StringStack.SetTop(result);
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402 | return true;
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403 | }
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404 | }
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405 |
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406 | /// <summary>
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407 | /// In top string on stack, replaces all occurences of second char with first char
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408 | /// </summary>
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409 | [PushExpression(StackTypes.String, "STRING.REPLACECHAR", StackTypes.Char)]
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410 | public class StringReplaceCharExpression : StatelessExpression {
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411 | public override bool Eval(IInternalPushInterpreter interpreter) {
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412 | if (interpreter.StringStack.IsEmpty ||
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413 | interpreter.CharStack.Count < 2)
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414 | return false;
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415 |
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416 | var chars = interpreter.CharStack.Pop(2);
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417 | var result = interpreter.StringStack.Top.Replace(chars[0], chars[1]);
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418 | interpreter.StringStack.SetTop(result);
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419 | return true;
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420 | }
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421 | }
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422 |
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423 | /// <summary>
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424 | /// In top string on stack, replaces first occurence of second char with first char
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425 | /// </summary>
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426 | [PushExpression(StackTypes.String, "STRING.REPLACEFIRSTCHAR", StackTypes.Char)]
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427 | public class StringReplaceLastCharExpression : StatelessExpression {
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428 | public override bool Eval(IInternalPushInterpreter interpreter) {
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429 | if (interpreter.StringStack.IsEmpty ||
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430 | interpreter.CharStack.Count < 2)
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431 | return false;
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432 |
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433 | var str = interpreter.StringStack.Top;
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434 | var chars = interpreter.CharStack.Pop(2);
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435 | var pos = interpreter.StringStack.Top.IndexOf(chars[0]);
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436 |
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437 | if (pos < 0)
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438 | return true;
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439 |
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440 | var result = str.Substring(0, pos) +
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441 | chars[1] +
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442 | str.Substring(Math.Min(pos + 2, str.Length - 1));
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443 | interpreter.StringStack.SetTop(result);
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444 | return true;
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445 | }
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446 | }
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447 |
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448 | /// <summary>
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449 | /// In top string on stack, remove all occurences of char
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450 | /// </summary>
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451 | [PushExpression(StackTypes.String, "STRING.REMOVECHAR", StackTypes.Char)]
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452 | public class StringRemoveCharExpression : StatelessExpression {
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453 | public override bool Eval(IInternalPushInterpreter interpreter) {
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454 | if (interpreter.StringStack.IsEmpty ||
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455 | interpreter.CharStack.IsEmpty)
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456 | return false;
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457 |
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458 | var c = interpreter.CharStack.Pop();
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459 | var result = interpreter.StringStack.Top.Trim(c);
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460 | interpreter.StringStack.SetTop(result);
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461 | return true;
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462 | }
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463 | }
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464 |
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465 | /// <summary>
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466 | /// Returns a function that sets char at index in string
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467 | /// </summary>
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468 | [PushExpression(StackTypes.String, "STRING.SETCHAR", StackTypes.Char | StackTypes.Integer)]
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469 | public class StringSetCharExpression : StatelessExpression {
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470 | public override bool Eval(IInternalPushInterpreter interpreter) {
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471 | if (interpreter.StringStack.IsEmpty ||
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472 | interpreter.CharStack.IsEmpty ||
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473 | interpreter.IntegerStack.IsEmpty)
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474 | return false;
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475 |
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476 | var str = interpreter.StringStack.Top;
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477 | var i = (int)interpreter.IntegerStack.Pop();
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478 | var c = interpreter.CharStack.Pop();
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479 |
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480 | if (str.Length == 0) {
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481 | interpreter.StringStack.Pop();
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482 | return true;
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483 | }
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484 |
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485 | var pos = str.Length == 1 ? 0 : Math.Abs(i) % (str.Length - 1);
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486 | var result = str.Substring(0, pos) + c + str.Substring(Math.Min(pos + 2, str.Length - 1));
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487 |
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488 | interpreter.StringStack.SetTop(result);
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489 | return true;
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490 | }
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491 | }
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492 | }
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