1 files changed, 104 insertions, 0 deletions
diff --git a/src/error.h b/src/error.h
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+++ b/src/error.h
@@ -0,0 +1,104 @@
+/*
+ * 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.
+ */
+
+/**
+ * @addtogroup util
+ */
+
+/**
+ * @file   error.h
+ * @author John Wiegley
+ *
+ * @ingroup util
+ */
+#ifndef _ERROR_H
+#define _ERROR_H
+
+#include "accum.h"
+
+namespace ledger {
+
+extern straccstream       _desc_accum;
+extern std::ostringstream _desc_buffer;
+
+template <typename T>
+inline void throw_func(const string& message) {
+  _desc_buffer.str("");
+  throw T(message);
+}
+
+#define throw_(cls, msg)			\
+  ((_desc_buffer << ACCUM(_desc_accum << msg)),	\
+   _desc_accum.clear(),				\
+   throw_func<cls>(_desc_buffer.str()))
+
+inline void warning_func(const string& message) {
+  std::cerr << "Warning: " << message << std::endl;
+  _desc_buffer.str("");
+}
+
+#define warning_(msg)				\
+  ((_desc_buffer << ACCUM(_desc_accum << msg)),	\
+   _desc_accum.clear(),				\
+   warning_func(_desc_buffer.str()))
+
+extern straccstream	  _ctxt_accum;
+extern std::ostringstream _ctxt_buffer;
+
+#define add_error_context(msg)					\
+  ((long(_ctxt_buffer.tellp()) == 0) ?				\
+   ((_ctxt_buffer << ACCUM(_ctxt_accum << msg)),		\
+    _ctxt_accum.clear()) :					\
+   ((_ctxt_buffer << std::endl << ACCUM(_ctxt_accum << msg)),	\
+    _ctxt_accum.clear()))
+
+string error_context();
+
+string file_context(const path& file, std::size_t line);
+string line_context(const string&	    line,
+		    const string::size_type pos     = 0,
+		    const string::size_type end_pos = 0);
+
+string source_context(const path&	     file,
+		      const istream_pos_type pos,
+		      const istream_pos_type end_pos,
+		      const string&	     prefix = "");
+
+#define DECLARE_EXCEPTION(name, kind)				\
+  class name : public kind {					\
+  public:							\
+  explicit name(const string& why) throw() : kind(why) {}	\
+  virtual ~name() throw() {}					\
+  }
+
+} // namespace ledger
+
+#endif // _ERROR_H