1 files changed, 118 insertions, 0 deletions
diff --git a/python/pyinterp.h b/python/pyinterp.h
new file mode 100644
index 00000000..5486eea5
--- /dev/null
+++ b/python/pyinterp.h
@@ -0,0 +1,118 @@
+/*
+ * Copyright (c) 2003-2008, John Wiegley.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ *
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ *
+ * - Neither the name of New Artisans LLC nor the names of its
+ *   contributors may be used to endorse or promote products derived from
+ *   this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef _PYINTERP_H
+#define _PYINTERP_H
+
+#include "scope.h"
+
+#include <boost/python.hpp>
+#include <Python.h>
+
+namespace ledger {
+
+class python_interpreter_t : public noncopyable, public scope_t
+{
+  boost::python::handle<> mmodule;
+
+  python_interpreter_t();
+
+public:
+  boost::python::dict nspace;
+
+  python_interpreter_t(expr_t::scope_t& parent);
+
+  virtual ~python_interpreter_t() {
+    TRACE_DTOR(python_interpreter_t);
+
+    Py_Finalize();
+  }
+
+  boost::python::object import(const string& name);
+
+  enum py_eval_mode_t {
+    PY_EVAL_EXPR,
+    PY_EVAL_STMT,
+    PY_EVAL_MULTI
+  };
+
+  boost::python::object eval(std::istream& in,
+			     py_eval_mode_t mode = PY_EVAL_EXPR);
+  boost::python::object eval(const string& str,
+			     py_eval_mode_t mode = PY_EVAL_EXPR);
+  boost::python::object eval(const char * c_str,
+			     py_eval_mode_t mode = PY_EVAL_EXPR) {
+    string str(c_str);
+    return eval(str, mode);
+  }
+
+  class functor_t {
+    functor_t();
+  protected:
+    boost::python::object func;
+  public:
+    functor_t(const string& name, boost::python::object _func) : func(_func) {
+      TRACE_CTOR(functor_t, "const string&, boost::python::object");
+    }
+    functor_t(const functor_t& other) : func(other.func) {
+      TRACE_CTOR(functor_t, "copy");
+    }
+    virtual ~functor_t() throw() {
+      TRACE_DTOR(functor_t);
+    }
+    virtual value_t operator()(expr_t::call_scope_t& args);
+  };
+
+  virtual expr_t::ptr_op_t lookup(const string& name) {
+    if (boost::python::object func = eval(name))
+      return WRAP_FUNCTOR(functor_t(name, func));
+    return expr_t::ptr_op_t();
+  }
+
+  class lambda_t : public functor_t {
+    lambda_t();
+  public:
+    lambda_t(boost::python::object code) : functor_t("<lambda>", code) {
+      TRACE_CTOR(functor_t, "boost::python::object");
+    }
+    lambda_t(const lambda_t& other) : functor_t(other) {
+      TRACE_CTOR(lambda_t, "copy");
+    }
+    virtual ~lambda_t() throw() {
+      TRACE_DTOR(lambda_t);
+    }
+    virtual value_t operator()(expr_t::call_scope_t& args);
+  };
+};
+
+} // namespace ledger
+
+#endif // _PYINTERP_H