/* DWARF 2 debugging format utils for GDB.

   This file is part of GDB.

   This program 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.

   This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.  */

/* Check for GCC >= 4.x according to the symtab->producer string.  Return minor
   version (x) of 4.x in such case.  If it is not GCC or it is GCC older than
   4.x return -1.  If it is GCC 5.x or higher return INT_MAX.  */

#include "config.h"
#include "dwarf2utils.h"
#include "stdio.h"
#include "string.h"
#include "defs.h"
#include "dyn-string.h"
#include <ctype.h>

#include "common/common-types.h"
#include "common/common-exceptions.h"
#include "common/common-utils.h"


#include "utils.h"

int
producer_is_gcc_ge_4 (const char *producer)
{
  int major, minor;

  if (! producer_is_gcc (producer, &major, &minor))
    return -1;
  if (major < 4)
    return -1;
  if (major > 4)
    return INT_MAX;
  return minor;
}

/* Returns nonzero if the given PRODUCER string is GCC and sets the MAJOR
   and MINOR versions when not NULL.  Returns zero if the given PRODUCER
   is NULL or it isn't GCC.  */

int
producer_is_gcc (const char *producer, int *major, int *minor)
{
  const char *cs;

  if (producer != NULL && startswith (producer, "GNU "))
    {
      int maj, min;

      if (major == NULL)
	major = &maj;
      if (minor == NULL)
	minor = &min;

      /* Skip any identifier after "GNU " - such as "C11" "C++" or "Java".
	 A full producer string might look like:
	 "GNU C 4.7.2"
	 "GNU Fortran 4.8.2 20140120 (Red Hat 4.8.2-16) -mtune=generic ..."
	 "GNU C++14 5.0.0 20150123 (experimental)"
      */
      cs = &producer[strlen ("GNU ")];
      while (*cs && !isspace (*cs))
        cs++;
      if (*cs && isspace (*cs))
        cs++;
      if (sscanf (cs, "%d.%d", major, minor) == 2)
	return 1;
    }

  /* Not recognized as GCC.  */
  return 0;
}