Create a py_value module, for translating value_t objects to/from Python.

1 files changed, 83 insertions, 0 deletions

diff --git a/python/py_value.cc b/python/py_value.cc
new file mode 100644
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--- /dev/null
+++ b/python/py_value.cc
@@ -0,0 +1,83 @@
+/*
+ * Copyright (c) 2003-2009, 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.
+ */
+
+#include "pyinterp.h"
+#include "pyutils.h"
+#include "value.h"
+
+#include <boost/python/exception_translator.hpp>
+#include <boost/python/implicit.hpp>
+#include <boost/python/args.hpp>
+
+namespace ledger {
+
+using namespace boost::python;
+
+#define EXC_TRANSLATOR(type)				\
+  void exc_translate_ ## type(const type& err) {	\
+    PyErr_SetString(PyExc_ArithmeticError, err.what());	\
+  }
+
+EXC_TRANSLATOR(value_error)
+
+void export_value()
+{
+#if 0
+      if (PyBool_Check(func.ptr()))
+	return extract<bool>(func)();
+      else if (PyInt_Check(func.ptr()))
+	return long(extract<int>(func)());
+      else if (PyString_Check(func.ptr()))
+	return string_value(extract<string>(func)());
+
+      extract<date_t> d(func);
+      if (d.check())
+	return value_t(d());
+      extract<datetime_t> dt(func);
+      if (dt.check())
+	return value_t(dt());
+#endif
+
+  register_optional_to_python<value_t>();
+
+#ifdef HAVE_GDTOA
+  implicitly_convertible<double, value_t>();
+#endif
+  implicitly_convertible<long, value_t>();
+  implicitly_convertible<string, value_t>();
+
+#define EXC_TRANSLATE(type) \
+  register_exception_translator<type>(&exc_translate_ ## type);
+
+  EXC_TRANSLATE(value_error);
+}
+
+} // namespace ledger