libdwfl/dwfl_onesrcline.c

/* Return one of the sources lines of a CU.
   Copyright (C) 2005 Red Hat, Inc.
   This file is part of Red Hat elfutils.

   Red Hat elfutils is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by the
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   Red Hat elfutils is an included package of the Open Invention Network.
   An included package of the Open Invention Network is a package for which
   Open Invention Network licensees cross-license their patents.  No patent
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#include "libdwflP.h"

Dwfl_Line *
dwfl_onesrcline (Dwarf_Die *cudie, size_t idx)
{
  struct dwfl_cu *cu = (struct dwfl_cu *) cudie;

  if (cudie == NULL)
    return NULL;

  if (cu->lines == NULL)
    {
      Dwfl_Error error = __libdwfl_cu_getsrclines (cu);
      if (error != DWFL_E_NOERROR)
	{
	  __libdwfl_seterrno (error);
	  return NULL;
	}
    }

  if (idx >= cu->die.cu->lines->nlines)
    {
      __libdwfl_seterrno (DWFL_E (LIBDW, DWARF_E_INVALID_LINE_IDX));
      return NULL;
    }

  return &cu->lines->idx[idx];
}