304 lines
14 KiB
C#
304 lines
14 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Globalization;
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using System.IO;
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using System.Linq;
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using System.Text;
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using System.Text.RegularExpressions;
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//TODO add parsing for more than single letter
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namespace ConsoleLSystem {
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abstract public class LSystemGeneralWordBuilder {
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abstract public LSystemNode createLSystemNode(string name, int values_number);
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abstract public void fillArguments(LSystemNode node, string[] arguments_strings);
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}
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public class LSystemWordBuilder : LSystemGeneralWordBuilder {
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public override LSystemNode createLSystemNode(string name, int values_number) {
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return new LSystemNode(new LSystemNodeLiteral(name, values_number));
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}
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public override void fillArguments(LSystemNode node, string[] arguments_strings) {
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for (int i = 0; i < arguments_strings.Length; i++) {
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node.literal.values[i] = float.Parse(arguments_strings[i], NumberStyles.Any, CultureInfo.InvariantCulture);
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}
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}
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}
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public class LSystemWordGeneratorBuilder : LSystemGeneralWordBuilder {
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public Dictionary<string, int> variableIndex { get;}
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public LSystemWordGeneratorBuilder(Dictionary<string,int> variable_index) {
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this.variableIndex = variable_index;
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}
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public override LSystemNode createLSystemNode(string name, int values_number) {
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return new LSystemNodeGenerator(name, values_number);
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}
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public override void fillArguments(LSystemNode node, string[] arguments_strings) {
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MathExpression[] expressions = arguments_strings.Select(argument => new MathExpression(variableIndex, argument)).ToArray();
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LSystemNodeGenerator ng = (LSystemNodeGenerator)node;
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ng.fillArguments(expressions);
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}
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}
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public class LSystemFileParser {
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//LSystemWordParser wordParser;
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//LSystemRulesParser ruleParser;
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//public LSystemFileParser(LSystemWordParser wordParser, LSystemRulesParser ruleParser) {
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// this.wordParser = wordParser;
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// this.ruleParser = ruleParser;
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//}
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public static int countParenthesisEnd(string line,char opening_char, char closing_char) {
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var parenthesises_number = 1;
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var length = -1;
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while (parenthesises_number > 0) {
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length++;
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var c = line[1 + length];
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if (c == opening_char) {
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parenthesises_number++;
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}
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if (c == closing_char) {
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parenthesises_number--;
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}
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}
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return length;
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}
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public static bool parenthesisCheck(string line) {
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var parenthesises_number = 0;
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var brackets_number = 0;
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foreach (var s in line) {
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if (s == '(') {
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parenthesises_number++;
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}
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if (s == ')') {
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parenthesises_number--;
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}
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if (s == '[') {
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brackets_number++;
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}
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if (s == ']') {
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brackets_number--;
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}
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if (brackets_number<0 || parenthesises_number < 0) {
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return false;
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}
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}
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return (brackets_number == 0 && parenthesises_number == 0);
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}
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public static LSystemNode parseWord(string line, LSystemGeneralWordBuilder builder) {
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var read_characters = 0;
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LSystemNode node;
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if (line[0] == '[') {
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node = builder.createLSystemNode("", 0);
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}
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else {
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var literal_name = line.Substring(0, 1);
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if (line.Length>1 && line[1] == '(') {
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var length = countParenthesisEnd(line.Substring(1), '(', ')');
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var values_string = line.Substring(2, length).Split(',');
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node = builder.createLSystemNode(literal_name, values_string.Length);
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builder.fillArguments(node, values_string);
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//Leter and: (, )
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read_characters += length + 3;
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}
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else {
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read_characters += 1;
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node = builder.createLSystemNode(line.Substring(0,1),0);
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}
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}
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while (line.Length > read_characters && line[read_characters] == '[') {
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var brackets_number = 1;
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var length = countParenthesisEnd(line.Substring(read_characters), '[', ']');
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var child_node = parseWord(line.Substring(read_characters + 1, length),builder);
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read_characters += length + 2;
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child_node.parent = node;
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node.children.Add(child_node);
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}
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if (read_characters < line.Length) {
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var child_node = parseWord(line.Substring(read_characters),builder);
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child_node.parent = node;
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node.mainChild = (child_node);
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}
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return node;
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}
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public static LSystemNodeLiteralVariable parsePredecesor(string line) {
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var name = line.Substring(0, 1);
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var varable_index = new Dictionary<string, int>();
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if (line.Length > 1) {
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foreach (var i in line.Substring(2, line.Length - 3).Split(',').Select((_name, Index) => new { _name, Index })) {
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varable_index.Add(i._name, i.Index);
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};
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}
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return new LSystemNodeLiteralVariable(name, varable_index.Count, varable_index);
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}
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public static LSystemEvaluator parseLSystem(StreamReader sr) {
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string line;
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int line_number = 0;
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LSystemNode axiom = null;
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List<LSystemRule> rules = null;
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while ((line = sr.ReadLine()) != null) {
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line_number++;
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if (line.Trim() == "#axiom") {
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line = sr.ReadLine();
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if (!parenthesisCheck(line)) {
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throw new Exception(String.Format("In line {0} invalid syntax", line_number));
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}
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axiom = parseWord(line,new LSystemWordBuilder());
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}
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if (line.Trim() == "#rules") {
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rules = parseLSystemRules(sr);
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}
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}
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return new LSystemEvaluator(axiom, rules);
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}
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private static List<LSystemRule> parseLSystemRules(StreamReader sr) {
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List<LSystemRule> rules = new List<LSystemRule>();
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Regex separator = new Regex(@"-(\d*\.?\d*){1}>");
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Regex weight_regex = new Regex(@"p=(\d+\.?\d*){1}");
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string line;
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while ((line = sr.ReadLine()) != null && line.Trim() != "#rules end") {
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try {
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if (line.Length == 0 || line[0] == '#') {
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continue;
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}
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MathExpressionComparison[] conditions = new MathExpressionComparison[0];
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var split = separator.Match(line);
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var line_parts = line.Split(new string[] { split.Value }, StringSplitOptions.None);
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// check conditions;
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//parse predecesor
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var _t = line_parts[0].Split(':');
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var predecesor_string = _t[0];
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LSystemNodeLiteralVariable predecesor;
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LSystemContext context;
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//check if contains < or >
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// check context
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getPredecesorContext(predecesor_string, out predecesor, out context);
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if (_t.Length > 1) {
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conditions = _t[1].Trim().Split(';').Select(text => MathExpressionComparasionParser.parse(predecesor.variableIndex, text.Trim())).ToArray();
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}
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// tochastic rule parsing
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var sucsessor_string = line_parts[1];
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var probabilities_list = new List<float>();
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var consequents_list = new List<LSystemNodeGenerator>();
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if (sucsessor_string.Trim() == "#stochastic") {
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while ((line = sr.ReadLine()) != null && line.Trim() != "#stochastic end") {
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if (line[0] == '#') {
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continue;
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}
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var weight_string = weight_regex.Match(line);
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var weight = float.Parse(weight_string.Value.Substring(2), NumberStyles.Any, CultureInfo.InvariantCulture);
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probabilities_list.Add(weight);
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var prob_len = weight_string.Value.Length;
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consequents_list.Add((LSystemNodeGenerator)parseWord(line.Substring(prob_len).Trim(), new LSystemWordGeneratorBuilder(predecesor.variableIndex)));
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}
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}
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else {
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consequents_list.Add((LSystemNodeGenerator)parseWord(sucsessor_string.Trim(), new LSystemWordGeneratorBuilder(predecesor.variableIndex)));
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}
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//context
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if (context != null) {
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if (consequents_list.Count > 1) {
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rules.Add(new LSystemRuleParametricStochasticContext(predecesor, conditions, consequents_list.ToArray(), probabilities_list.ToArray(), context));
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}
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else {
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rules.Add(new LSystemRuleParametricStochasticContext(predecesor, conditions, consequents_list[0], context));
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}
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}
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else {
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if (consequents_list.Count > 1) {
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rules.Add(new LSystemRuleParametricStochastic(predecesor, conditions, consequents_list.ToArray(), probabilities_list.ToArray()));
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}
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else {
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rules.Add(new LSystemRuleParametric(predecesor, conditions, consequents_list[0]));
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}
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}
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//var conditions = parts[0];
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//var result
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}
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catch (Exception e) {
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sr.Close();
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throw new Exception(String.Format("error in {0} with a message \n {1}", line,e.Message));
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}
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}
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return rules;
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}
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private static void getPredecesorContext(string predecesor_string, out LSystemNodeLiteralVariable predecesor, out LSystemContext context) {
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string partent_context_str = null;
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string child_context_str = null;
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string mid_context_str = null;
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int mid_start = 0;
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for (int i = 0; i < predecesor_string.Length; i++) {
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if (predecesor_string[i] == '<' && partent_context_str == null) {
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partent_context_str = predecesor_string.Substring(0, i).Trim();
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mid_start = i+1;
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//Console.WriteLine(i);
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}
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if (predecesor_string[i] == '>' && child_context_str == null) {
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child_context_str = predecesor_string.Substring(i + 1).Trim();
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mid_context_str = predecesor_string.Substring(mid_start, i - mid_start).Trim();
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//Console.WriteLine(i);
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}
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}
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if (mid_context_str == null) {
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mid_context_str = predecesor_string.Substring(mid_start).Trim();
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}
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LSystemNodeLiteralVariable parent = null;
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LSystemNodeLiteralVariable child = null;
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predecesor = LSystemFileParser.parsePredecesor(mid_context_str);
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if (partent_context_str != null) {
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parent = LSystemFileParser.parsePredecesor(partent_context_str);
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foreach (KeyValuePair<string, int> kvp in new Dictionary<string, int>(predecesor.variableIndex)) {
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//textBox3.Text += ("Key = {0}, Value = {1}", kvp.Key, kvp.Value);
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predecesor.variableIndex[kvp.Key] = kvp.Value + parent.variableIndex.Count;
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}
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foreach (KeyValuePair<string, int> kvp in parent.variableIndex) {
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//textBox3.Text += ("Key = {0}, Value = {1}", kvp.Key, kvp.Value);
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predecesor.variableIndex.Add(kvp.Key, kvp.Value);
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}
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}
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if (child_context_str != null) {
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int size = predecesor.variableIndex.Count;
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child = LSystemFileParser.parsePredecesor(child_context_str);
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foreach (KeyValuePair<string, int> kvp in child.variableIndex) {
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//textBox3.Text += ("Key = {0}, Value = {1}", kvp.Key, kvp.Value);
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predecesor.variableIndex.Add(kvp.Key, kvp.Value + size);
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}
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}
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if (child_context_str != null) {
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if (partent_context_str != null) {
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context = new LSystemContext(parent, child);
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}
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else {
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context = new LSystemContext();
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context.setOnlySucceeding(child);
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}
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}
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else if (partent_context_str != null) {
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context = new LSystemContext();
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context.setOnlyPreceding(parent);
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}
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else {
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context = null;
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}
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}
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}
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}
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