libgdiagnostics++.h

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/* A C++ wrapper API around libgdiagnostics.h for emitting diagnostics.
   Copyright (C) 2023-2025 Free Software Foundation, Inc.
 
This file is part of GCC.
 
GCC 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, or (at your option)
any later version.
 
GCC 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 GCC; see the file COPYING3.  If not see
<http://www.gnu.org/licenses/>.  */
 
#ifndef LIBGDIAGNOSTICSPP_H
#define LIBGDIAGNOSTICSPP_H
 
#include "libgdiagnostics.h"
 
namespace libgdiagnostics {
 
typedef diagnostic_line_num_t line_num_t;
typedef diagnostic_column_num_t column_num_t;
 
class file;
class physical_location;
class logical_location;
class execution_path;
class group;
class manager;
class diagnostic;
 
/* Wrapper around a borrowed diagnostic_text_sink *.  */
 
class text_sink
{
public:
  text_sink (diagnostic_text_sink *inner)
  : m_inner (inner)
  {
  }
 
  void
  set_source_printing_enabled (int value)
  {
    diagnostic_text_sink_set_source_printing_enabled (m_inner, value);
  }
 
  void
  set_colorize (enum diagnostic_colorize colorize)
  {
    diagnostic_text_sink_set_colorize (m_inner, colorize);
  }
 
  void
  set_labelled_source_colorization_enabled (int value)
  {
    diagnostic_text_sink_set_labelled_source_colorization_enabled (m_inner,
                                                                   value);
  }
 
  diagnostic_text_sink *m_inner;
};
 
/* Wrapper around a diagnostic_file *.  */
 
class file
{
public:
  file () : m_inner (nullptr) {}
  file (diagnostic_file *file) : m_inner (file) {}
  file (const file &other) : m_inner (other.m_inner) {}
  file &operator= (const file &other) { m_inner = other.m_inner; return *this; }
 
  void set_buffered_content (const char *data, size_t sz);
 
  diagnostic_file * m_inner;
};
 
/* Wrapper around a const diagnostic_physical_location *.  */
 
class physical_location
{
public:
  physical_location () : m_inner (nullptr) {}
 
  physical_location (const diagnostic_physical_location *location)
  : m_inner (location)
  {}
 
  file get_file () const;
 
  const diagnostic_physical_location *m_inner;
};
 
/* Wrapper around a const diagnostic_logical_location *.  */
 
class logical_location
{
public:
  logical_location () : m_inner (nullptr) {}
 
  logical_location (const diagnostic_logical_location *logical_loc)
  : m_inner (logical_loc)
  {}
 
  const diagnostic_logical_location *m_inner;
};
 
/* RAII class around a diagnostic_execution_path *.  */
 
class execution_path
{
public:
  execution_path () : m_inner (nullptr), m_owned (false) {}
 
  execution_path (diagnostic_execution_path *path)
  : m_inner (path), m_owned (true)
  {}
 
  execution_path (const diagnostic_execution_path *path)
  : m_inner (const_cast<diagnostic_execution_path *> (path)),
    m_owned (false)
  {}
 
  execution_path (const execution_path &other) = delete;
  execution_path &operator= (const execution_path &other) = delete;
 
  execution_path (execution_path &&other)
  : m_inner (other.m_inner),
    m_owned (other.m_owned)
  {
    other.m_inner = nullptr;
    other.m_owned = false;
  }
 
  execution_path &operator= (execution_path &&other)
  {
    m_inner = other.m_inner;
    m_owned = other.m_owned;
    other.m_inner = nullptr;
    other.m_owned = false;
    return *this;
  }
 
  ~execution_path ()
  {
    if (m_owned)
      diagnostic_execution_path_release (m_inner);
  }
 
  diagnostic_event_id
  add_event (physical_location physical_loc,
             logical_location logical_loc,
             unsigned stack_depth,
             const char *fmt, ...)
    LIBGDIAGNOSTICS_PARAM_GCC_FORMAT_STRING (5, 6);
 
  diagnostic_event_id
  add_event_va (physical_location physical_loc,
                logical_location logical_loc,
                unsigned stack_depth,
                const char *fmt,
                va_list *args)
    LIBGDIAGNOSTICS_PARAM_GCC_FORMAT_STRING (5, 0);
 
  diagnostic_execution_path *m_inner;
  bool m_owned;
};
 
/* RAII class for starting/ending a group within a diagnostic_manager.  */
 
class group
{
public:
  group (manager &mgr);
  ~group ();
 
private:
  manager &m_mgr;
};
 
/* Wrapper around a diagnostic *.  */
 
class diagnostic
{
public:
  diagnostic (::diagnostic *d) : m_inner (d) {}
 
  void
  set_cwe (unsigned cwe_id);
 
  void
  add_rule (const char *title, const char *url);
 
  void
  set_location (physical_location loc);
 
  void
  add_location (physical_location loc);
 
  void
  add_location_with_label (physical_location loc,
                           const char *text);
 
  void
  set_logical_location (logical_location loc);
 
  void
  add_fix_it_hint_insert_before (physical_location loc,
                                 const char *addition);
  void
  add_fix_it_hint_insert_after (physical_location loc,
                                const char *addition);
  void
  add_fix_it_hint_replace (physical_location loc,
                           const char *replacement);
  void
  add_fix_it_hint_delete (physical_location loc);
 
  void
  take_execution_path (execution_path path);
 
  void
  finish (const char *fmt, ...)
    LIBGDIAGNOSTICS_PARAM_MUST_BE_NON_NULL (2)
    LIBGDIAGNOSTICS_PARAM_GCC_FORMAT_STRING (2, 3);
 
  void
  finish_va (const char *fmt, va_list *args)
    LIBGDIAGNOSTICS_PARAM_MUST_BE_NON_NULL (2)
    LIBGDIAGNOSTICS_PARAM_GCC_FORMAT_STRING (2, 0);
 
  ::diagnostic * const m_inner;
};
 
/* Wrapper around a diagnostic_manager *, possibly with ownership.  */
 
class manager
{
public:
  manager ()
  : m_inner (diagnostic_manager_new ()),
    m_owned (true)
  {
  }
  manager (diagnostic_manager *inner, bool owned)
  : m_inner (inner),
    m_owned (owned)
  {
  }
  ~manager ()
  {
    if (m_owned)
      diagnostic_manager_release (m_inner);
  }
 
  manager (const manager &other) = delete;
  manager (manager &&other)
  : m_inner (other.m_inner),
    m_owned (other.m_owned)
  {
    other.m_inner = nullptr;
  }
 
  void
  set_tool_name (const char *value)
  {
    diagnostic_manager_set_tool_name (m_inner, value);
  }
 
  void
  set_full_name (const char *value)
  {
    diagnostic_manager_set_full_name (m_inner, value);
  }
 
  void
  set_version_string (const char *value)
  {
    diagnostic_manager_set_version_string (m_inner, value);
  }
 
  void
  set_version_url (const char *value)
  {
    diagnostic_manager_set_version_url (m_inner, value);
  }
 
  text_sink
  add_text_sink (FILE *dst_stream,
                 enum diagnostic_colorize colorize)
  {
    return text_sink
      (diagnostic_manager_add_text_sink (m_inner, dst_stream, colorize));
  }
 
  void
  add_sarif_sink (FILE *dst_stream,
                  file main_input_file,
                  enum diagnostic_sarif_version version)
  {
    diagnostic_manager_add_sarif_sink (m_inner, dst_stream,
                                       main_input_file.m_inner,
                                       version);
  }
 
  void
  write_patch (FILE *dst_stream)
  {
    diagnostic_manager_write_patch (m_inner, dst_stream);
  }
 
  /* Location management.  */
 
  file
  new_file (const char *name,
            const char *sarif_source_language)
    LIBGDIAGNOSTICS_PARAM_MUST_BE_NON_NULL (2)
    LIBGDIAGNOSTICS_PARAM_CAN_BE_NULL (3);
 
  void
  debug_dump (file f,
              FILE *out);
 
  physical_location
  new_location_from_file_and_line (file f, diagnostic_line_num_t line_num);
 
  physical_location
  new_location_from_file_line_column (file f,
                                      line_num_t line_num,
                                      column_num_t column_num);
 
  physical_location
  new_location_from_range (physical_location loc_caret,
                           physical_location loc_start,
                           physical_location loc_end);
 
  void
  debug_dump (physical_location loc,
              FILE *out);
 
  logical_location
  new_logical_location (enum diagnostic_logical_location_kind_t kind,
                        logical_location parent,
                        const char *short_name,
                        const char *fully_qualified_name,
                        const char *decorated_name);
 
  void
  debug_dump (logical_location loc,
              FILE *out);
 
  execution_path
  new_execution_path ();
 
  diagnostic
  begin_diagnostic (enum diagnostic_level level);
 
 
  diagnostic_manager *m_inner;
  bool m_owned;
};
 
// Implementation
 
// class file
 
inline void
file::set_buffered_content (const char *data, size_t sz)
{
  diagnostic_file_set_buffered_content (m_inner, data, sz);
}
 
// class physical_location
 
inline file
physical_location::get_file () const
{
  return file (diagnostic_physical_location_get_file (m_inner));
}
 
// class execution_path
 
inline diagnostic_event_id
execution_path::add_event (physical_location physical_loc,
                           logical_location logical_loc,
                           unsigned stack_depth,
                           const char *fmt, ...)
{
  va_list args;
  va_start (args, fmt);
  diagnostic_event_id result = add_event_va (physical_loc,
                                             logical_loc,
                                             stack_depth,
                                             fmt, &args);
  va_end (args);
 
  return result;
}
 
inline diagnostic_event_id
execution_path::add_event_va (physical_location physical_loc,
                              logical_location logical_loc,
                              unsigned stack_depth,
                              const char *fmt,
                              va_list *args)
{
  return diagnostic_execution_path_add_event_va (m_inner,
                                                 physical_loc.m_inner,
                                                 logical_loc.m_inner,
                                                 stack_depth,
                                                 fmt,
                                                 args);
}
 
// class group
 
inline
group::group (manager &mgr)
: m_mgr (mgr)
{
  diagnostic_manager_begin_group (m_mgr.m_inner);
}
 
inline
group::~group ()
{
  diagnostic_manager_end_group (m_mgr.m_inner);
}
 
// class diagnostic
 
inline void
diagnostic::set_cwe (unsigned cwe_id)
{
  diagnostic_set_cwe (m_inner, cwe_id);
}
 
inline void
diagnostic::add_rule (const char *title, const char *url)
{
  diagnostic_add_rule (m_inner, title, url);
}
 
inline void
diagnostic::set_location (physical_location loc)
{
  diagnostic_set_location (m_inner, loc.m_inner);
}
 
inline void
diagnostic::add_location_with_label (physical_location loc,
                                     const char *text)
{
  diagnostic_add_location_with_label (m_inner, loc.m_inner, text);
}
 
inline void
diagnostic::add_location (physical_location loc)
{
  diagnostic_add_location (m_inner, loc.m_inner);
}
 
inline void
diagnostic::set_logical_location (logical_location loc)
{
  diagnostic_set_logical_location (m_inner, loc.m_inner);
}
 
inline void
diagnostic::add_fix_it_hint_insert_before (physical_location loc,
                                           const char *addition)
{
  diagnostic_add_fix_it_hint_insert_before (m_inner,
                                            loc.m_inner,
                                            addition);
}
 
inline void
diagnostic::add_fix_it_hint_insert_after (physical_location loc,
                                const char *addition)
{
  diagnostic_add_fix_it_hint_insert_after (m_inner,
                                           loc.m_inner,
                                           addition);
}
 
inline void
diagnostic::add_fix_it_hint_replace (physical_location loc,
                                     const char *replacement)
{
  diagnostic_add_fix_it_hint_replace (m_inner,
                                      loc.m_inner,
                                      replacement);
}
 
inline void
diagnostic::add_fix_it_hint_delete (physical_location loc)
{
  diagnostic_add_fix_it_hint_delete (m_inner,
                                     loc.m_inner);
}
 
inline void
diagnostic::take_execution_path (execution_path path)
{
  diagnostic_take_execution_path (m_inner,
                                  path.m_inner);
  path.m_owned = false;
}
 
inline void
diagnostic::finish (const char *fmt, ...)
{
  va_list ap;
  va_start (ap, fmt);
  diagnostic_finish_va (m_inner, fmt, &ap);
  va_end (ap);
}
 
inline void
diagnostic::finish_va (const char *fmt, va_list *args)
{
  diagnostic_finish_va (m_inner, fmt, args);
}
 
// class manager
 
inline file
manager::new_file (const char *name,
                   const char *sarif_source_language)
{
  return file
    (diagnostic_manager_new_file (m_inner, name, sarif_source_language));
}
 
inline physical_location
manager::new_location_from_file_and_line (file f,
                                          diagnostic_line_num_t line_num)
{
  return physical_location
    (diagnostic_manager_new_location_from_file_and_line (m_inner,
                                                         f.m_inner,
                                                         line_num));
}
 
inline physical_location
manager::new_location_from_file_line_column (file f,
                                             line_num_t line_num,
                                             column_num_t column_num)
{
  return physical_location
    (diagnostic_manager_new_location_from_file_line_column (m_inner,
                                                            f.m_inner,
                                                            line_num,
                                                            column_num));
}
 
inline physical_location
manager::new_location_from_range (physical_location loc_caret,
                                  physical_location loc_start,
                                  physical_location loc_end)
{
  return physical_location
    (diagnostic_manager_new_location_from_range (m_inner,
                                                 loc_caret.m_inner,
                                                 loc_start.m_inner,
                                                 loc_end.m_inner));
}
 
inline void
manager::debug_dump (physical_location loc,
                     FILE *out)
{
  diagnostic_manager_debug_dump_location (m_inner,
                                          loc.m_inner,
                                          out);
}
inline logical_location
manager::new_logical_location (enum diagnostic_logical_location_kind_t kind,
                               logical_location parent,
                               const char *short_name,
                               const char *fully_qualified_name,
                               const char *decorated_name)
{
  return logical_location
    (diagnostic_manager_new_logical_location (m_inner,
                                              kind,
                                              parent.m_inner,
                                              short_name,
                                              fully_qualified_name,
                                              decorated_name));
}
 
inline void
manager::debug_dump (logical_location loc,
                     FILE *out)
{
  diagnostic_manager_debug_dump_logical_location (m_inner,
                                                  loc.m_inner,
                                                  out);
}
 
inline execution_path
manager::new_execution_path ()
{
  return execution_path (diagnostic_manager_new_execution_path (m_inner));
}
 
inline diagnostic
manager::begin_diagnostic (enum diagnostic_level level)
{
  return diagnostic (diagnostic_begin (m_inner, level));
}
 
} // namespace libgdiagnostics
 
#endif // #ifndef LIBGDIAGNOSTICSPP_H