tiles.rc: rename tiles.dat to tiles.rc, bring TileSpec into main program

git-svn-id: https://micropolis.googlecode.com/svn/trunk/micropolis-java@730 d9718cc8-9f43-0410-858b-315f434eb58c

src/micropolisj/engine/TileSpec.java

@@ -0,0 +1,156 @@
+package micropolisj.engine;
+
+import java.util.*;
+
+public class TileSpec
+{
+	Map<String,String> attributes;
+	List<String> images;
+
+	protected TileSpec()
+	{
+		this.attributes = new HashMap<String,String>();
+		this.images = new ArrayList<String>();
+	}
+
+	public static TileSpec parse(String inStr)
+	{
+		TileSpec ts = new TileSpec();
+		ts.load(inStr);
+		return ts;
+	}
+
+	public String getAttribute(String key)
+	{
+		return attributes.get(key);
+	}
+
+	public String [] getImages()
+	{
+		return images.toArray(new String[0]);
+	}
+
+	protected void load(String inStr)
+	{
+		Scanner in = new Scanner(inStr);
+
+		while (in.hasMore()) {
+
+			if (in.peekChar() == '(') {
+				in.eatChar('(');
+				String k = in.readAttributeKey();
+				String v = "1";
+				if (in.peekChar() == '=') {
+					in.eatChar('=');
+					v = in.readAttributeValue();
+				}
+				in.eatChar(')');
+				attributes.put(k, v);
+			}
+
+			else if (in.peekChar() == '|' || in.peekChar() == ',') {
+				in.eatChar(in.peekChar());
+			}
+
+			else {
+				String v = in.readImageSpec();
+				images.add(v);
+			}
+		}
+	}
+
+	static class Scanner
+	{
+		String str;
+		int off = 0;
+
+		Scanner(String str)
+		{
+			this.str = str;
+		}
+
+		private void skipWhitespace()
+		{
+			while (off < str.length() && Character.isWhitespace(str.charAt(off))) {
+				off++;
+			}
+		}
+
+		public int peekChar()
+		{
+			skipWhitespace();
+			if (off < str.length()) {
+				return str.charAt(off);
+			}
+			else {
+				return -1;
+			}
+		}
+
+		public void eatChar(int ch)
+		{
+			skipWhitespace();
+			assert str.charAt(off) == ch;
+			off++;
+		}
+
+		public String readAttributeKey()
+		{
+			skipWhitespace();
+
+			int start = off;
+			while (off < str.length() && (str.charAt(off) == '-' || Character.isLetterOrDigit(str.charAt(off)))) {
+				off++;
+			}
+
+			if (off != start) {
+				return str.substring(start, off);
+			}
+			else {
+				return null;
+			}
+		}
+
+		public String readAttributeValue()
+		{
+			return readString();
+		}
+
+		public String readImageSpec()
+		{
+			return readString();
+		}
+
+		protected String readString()
+		{
+			skipWhitespace();
+
+			int endQuote = 0; //any whitespace or certain punctuation
+			if (peekChar() == '"') {
+				off++;
+				endQuote = '"';
+			}
+
+			int start = off;
+			while (off < str.length()) {
+				int c = str.charAt(off);
+				if (c == endQuote) {
+					int end = off;
+					off++;
+					return str.substring(start,end);
+				}
+				else if (endQuote == 0 && (Character.isWhitespace(c) || c == ')' || c == '|')) {
+					int end = off;
+					return str.substring(start, end);
+				}
+				off++;
+			}
+			return str.substring(start);
+		}
+
+		public boolean hasMore()
+		{
+			return peekChar() != -1;
+		}
+	}
+}