Migrated over both code and build environment from was-v3.0 branch.

1 files changed, 98 insertions, 0 deletions

diff --git a/pyinterp.h b/pyinterp.h
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+/*
+ * Copyright (c) 2003-2007, 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 "xpath.h"
+
+#include <boost/python.hpp>
+#include <Python.h>
+
+namespace ledger {
+
+class python_interpreter_t : public xml::xpath_t::symbol_scope_t
+{
+  boost::python::handle<> mmodule;
+
+ public:
+  boost::python::dict nspace;
+
+  python_interpreter_t(xml::xpath_t::scope_t& parent);
+
+  virtual ~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 {
+  protected:
+    boost::python::object func;
+  public:
+    functor_t(const string& name, boost::python::object _func) : func(_func) {}
+    virtual ~functor_t() {}
+    virtual value_t operator()(xml::xpath_t::call_scope_t& args);
+  };
+
+  virtual xml::xpath_t::ptr_op_t lookup(const string& name) {
+    if (boost::python::object func = eval(name))
+      return WRAP_FUNCTOR(functor_t(name, func));
+    else
+      return xml::xpath_t::symbol_scope_t::lookup(name);
+  }
+
+  class lambda_t : public functor_t {
+   public:
+    lambda_t(boost::python::object code) : functor_t("<lambda>", code) {}
+    virtual value_t operator()(xml::xpath_t::call_scope_t& args);
+  };
+};
+
+} // namespace ledger
+
+#endif // _PYINTERP_H