1 files changed, 134 insertions, 0 deletions
diff --git a/kdesu/kdesud/lexer.cpp b/kdesu/kdesud/lexer.cpp
new file mode 100644
index 000000000..a05251a58
--- /dev/null
+++ b/kdesu/kdesud/lexer.cpp
@@ -0,0 +1,134 @@
+/* vi: ts=8 sts=4 sw=4
+ *
+ * This file is part of the KDE project, module kdesu.
+ * Copyright (C) 1999,2000 Geert Jansen <jansen@kde.org>
+ * 
+ * lexer.cpp: A lexer for the kdesud protocol. See kdesud.cpp for a
+ *            description of the protocol.
+ */
+
+#include <ctype.h>
+#include <qcstring.h>
+#include "lexer.h"
+
+
+Lexer::Lexer(const QCString &input)
+{
+    m_Input = input;
+    in = 0;
+}
+
+Lexer::~Lexer()
+{
+    // Erase buffers
+    m_Input.fill('x');
+    m_Output.fill('x');
+}
+
+QCString &Lexer::lval()
+{
+    return m_Output;
+}
+
+/*
+ * lex() is the lexer. There is no end-of-input check here so that has to be
+ * done by the caller.
+ */
+
+int Lexer::lex()
+{
+    char c;
+
+    c = m_Input[in++];
+    m_Output.fill('x');
+    m_Output.resize(0);
+
+    while (1) 
+    {
+	// newline? 
+	if (c == '\n')
+	    return '\n';
+
+	// No control characters 
+	if (iscntrl(c))
+	    return Tok_none;
+
+	if (isspace(c))
+	    while (isspace(c = m_Input[in++]));
+
+	// number?
+	if (isdigit(c)) 
+	{
+	    m_Output += c;
+	    while (isdigit(c = m_Input[in++]))
+		m_Output += c;
+	    in--;
+	    return Tok_num;
+	}
+
+	// quoted string?
+	if (c == '"') 
+	{
+	    c = m_Input[in++];
+	    while ((c != '"') && !iscntrl(c)) {
+		// handle escaped characters
+		if (c == '\\')
+		    m_Output += m_Input[in++];
+		else
+		    m_Output += c;
+		c = m_Input[in++];
+	    }
+	    if (c == '"')
+		return Tok_str;
+	    return Tok_none;
+	}
+
+	// normal string
+	while (!isspace(c) && !iscntrl(c)) 
+	{
+	    m_Output += c;
+	    c = m_Input[in++];
+	}
+	in--;
+
+	// command? 
+	if (m_Output.length() <= 4) 
+	{
+	    if (m_Output == "EXEC")
+		return Tok_exec;
+	    if (m_Output == "PASS")
+		return Tok_pass;
+	    if (m_Output == "DEL")
+		return Tok_delCmd;
+	    if (m_Output == "PING")
+		return Tok_ping;
+	    if (m_Output == "EXIT")
+		return Tok_exit;
+	    if (m_Output == "STOP")
+		return Tok_stop;
+	    if (m_Output == "SET")
+		return Tok_set;
+	    if (m_Output == "GET")
+		return Tok_get;
+	    if (m_Output == "HOST")
+		return Tok_host;
+	    if (m_Output == "SCHD")
+		return Tok_sched;
+	    if (m_Output == "PRIO")
+		return Tok_prio;
+	    if (m_Output == "DELV")
+		return Tok_delVar;
+	    if (m_Output == "DELG")
+		return Tok_delGroup;
+	    if (m_Output == "DELS")
+		return Tok_delSpecialKey;
+        if (m_Output == "GETK")
+        return Tok_getKeys;
+        if (m_Output == "CHKG")
+        return Tok_chkGroup;
+	}
+
+	return Tok_str;
+    }
+}
+