/*

Copyright (C) 1993-2011 John W. Eaton

This file is part of Octave.

Octave is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by the
Free Software Foundation; either version 3 of the License, or (at your
option) any later version.

Octave is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
for more details.

You should have received a copy of the GNU General Public License
along with Octave; see the file COPYING.  If not, see
<http://www.gnu.org/licenses/>.

*/

#if !defined (octave_error_h)
#define octave_error_h 1

#include <cstdarg>
#include <string>

class octave_value_list;
class unwind_protect;

#define panic_impossible() \
  panic ("impossible state reached in file `%s' at line %d", \
         __FILE__, __LINE__)

extern OCTINTERP_API void reset_error_handler (void);

extern OCTINTERP_API int warning_enabled (const std::string& id);

extern OCTINTERP_API void vmessage (const char *name, const char *fmt, va_list args);
extern OCTINTERP_API void message (const char *name, const char *fmt, ...);

extern OCTINTERP_API void vusage (const char *fmt, va_list args);
extern OCTINTERP_API void usage (const char *fmt, ...);

extern OCTINTERP_API void vwarning (const char *fmt, va_list args);
extern OCTINTERP_API void warning (const char *fmt, ...);

extern OCTINTERP_API void verror (const char *fmt, va_list args);
extern OCTINTERP_API void error (const char *fmt, ...);

extern OCTINTERP_API void verror_with_cfn (const char *fmt, va_list args);
extern OCTINTERP_API void error_with_cfn (const char *fmt, ...);

extern OCTINTERP_API void vparse_error (const char *fmt, va_list args);
extern OCTINTERP_API void parse_error (const char *fmt, ...);

extern OCTINTERP_API void
vmessage_with_id (const char *id, const char *name, const char *fmt, va_list args);

extern OCTINTERP_API void
message_with_id (const char *id, const char *name, const char *fmt, ...);

extern OCTINTERP_API void
vusage_with_id (const char *id, const char *fmt, va_list args);

extern OCTINTERP_API void
usage_with_id (const char *id, const char *fmt, ...);

extern OCTINTERP_API void
vwarning_with_id (const char *id, const char *fmt, va_list args);

extern OCTINTERP_API void
warning_with_id (const char *id, const char *fmt, ...);

extern OCTINTERP_API void
verror_with_id (const char *id, const char *fmt, va_list args);

extern OCTINTERP_API void
error_with_id (const char *id, const char *fmt, ...);

extern OCTINTERP_API void
verror_with_id_cfn (const char *id, const char *fmt, va_list args);

extern OCTINTERP_API void
error_with_id_cfn (const char *id, const char *fmt, ...);

extern OCTINTERP_API void
vparse_error_with_id (const char *id, const char *fmt, va_list args);

extern OCTINTERP_API void
parse_error_with_id (const char *id, const char *fmt, ...);

extern OCTINTERP_API void panic (const char *fmt, ...) GCC_ATTR_NORETURN;

// Helper function for print_usage defined in defun.cc.
extern OCTINTERP_API void defun_usage_message (const std::string& msg);

extern OCTINTERP_API octave_value_list
set_warning_state (const std::string& id, const std::string& state);

extern OCTINTERP_API octave_value_list
set_warning_state (const octave_value_list& args);

extern OCTINTERP_API void disable_warning (const std::string& id);
extern OCTINTERP_API void initialize_default_warning_state (void);

// TRUE means that Octave will try to enter the debugger when an error
// is encountered.  This will also inhibit printing of the normal
// traceback message (you will only see the top-level error message).
extern OCTINTERP_API bool Vdebug_on_error;

// TRUE means that Octave will try to enter the debugger when a warning
// is encountered.
extern OCTINTERP_API bool Vdebug_on_warning;

// Current error state.
extern OCTINTERP_API int error_state;

// Current warning state.
extern OCTINTERP_API int warning_state;

// Tell the error handler whether to print messages, or just store
// them for later.  Used for handling errors in eval() and
// the `unwind_protect' statement.
extern OCTINTERP_API int buffer_error_messages;

// TRUE means error messages are turned off.
extern OCTINTERP_API bool discard_error_messages;

// TRUE means warning messages are turned off.
extern OCTINTERP_API bool discard_warning_messages;

// Helper functions to pass last error and warning messages and ids
extern OCTINTERP_API std::string last_error_message (void);
extern OCTINTERP_API std::string last_error_id (void);
extern OCTINTERP_API std::string last_warning_message (void);
extern OCTINTERP_API std::string last_warning_id (void);

extern OCTINTERP_API void interpreter_try (unwind_protect&);

#endif
