move stuff into trunk

1 files changed, 147 insertions, 0 deletions

diff --git a/src/java/org/anarres/cpp/CppReader.java b/src/java/org/anarres/cpp/CppReader.java
new file mode 100644
index 0000000..0aa6788
--- /dev/null
+++ b/src/java/org/anarres/cpp/CppReader.java
@@ -0,0 +1,147 @@
+/*
+ * Anarres C Preprocessor
+ * Copyright (C) 2007 Shevek
+ * 
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+
+package org.anarres.cpp;
+
+import java.io.File;
+import java.io.IOException;
+import java.io.Reader;
+
+import static org.anarres.cpp.Token.*;
+
+/**
+ * A Reader wrapper around the Preprocessor.
+ *
+ * This is a utility class to provide a transparent {@link Reader}
+ * which preprocesses the input text.
+ *
+ * @see Preprocessor
+ * @see Reader
+ */
+public class CppReader extends Reader {
+
+	private Preprocessor	cpp;
+	private String			token;
+	private int				idx;
+
+	public CppReader(final Reader r) {
+		cpp = new Preprocessor(new LexerSource(r, true) {
+			@Override
+			public String getName() {
+				return "<CppReader Input@" +
+						System.identityHashCode(r) + ">";
+			}
+		});
+		token = "";
+		idx = 0;
+	}
+
+	public CppReader(Preprocessor p) {
+		cpp = p;
+		token = "";
+		idx = 0;
+	}
+
+	/**
+	 * Returns the Preprocessor used by this CppReader.
+	 */
+	public Preprocessor getPreprocessor() {
+		return cpp;
+	}
+
+	/**
+	 * Defines the given name as a macro.
+	 *
+	 * This is a convnience method.
+	 */
+	public void addMacro(String name)
+						throws LexerException {
+		cpp.addMacro(name);
+	}
+
+	/**
+	 * Defines the given name as a macro.
+	 *
+	 * This is a convnience method.
+	 */
+	public void addMacro(String name, String value)
+						throws LexerException {
+		cpp.addMacro(name, value);
+	}
+
+	private boolean refill()
+						throws IOException {
+		try {
+			assert cpp != null : "cpp is null : was it closed?";
+			if (token == null)
+				return false;
+			while (idx >= token.length()) {
+				Token	tok = cpp.token();
+				switch (tok.getType()) {
+					case EOF:
+						token = null;
+						return false;
+					case COMMENT:
+						if (false) {
+							token = " ";
+							break;
+						}
+					default:
+						token = tok.getText();
+						break;
+				}
+				idx = 0;
+			}
+			return true;
+		}
+		catch (LexerException e) {
+			IOException	ie = new IOException(String.valueOf(e));
+			ie.initCause(e);
+			throw ie;
+		}
+	}
+
+	public int read()
+						throws IOException {
+		if (!refill())
+			return -1;
+		return token.charAt(idx++);
+	}
+
+	/* XXX Very slow and inefficient. */
+	public int read(char cbuf[], int off, int len)
+						throws IOException {
+		if (token == null)
+			return -1;
+		for (int i = 0; i < len; i++) {
+			int	ch = read();
+			if (ch == -1)
+				return i;
+			cbuf[off + i] = (char)ch;
+		}
+		return len;
+	}
+
+	public void close()
+						throws IOException {
+		cpp = null;
+		token = null;
+	}
+
+}