/* Output colorization.

   Copyright 2011-2017 Free Software Foundation, Inc.

   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, 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, write to the Free Software

   Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA

   02110-1301, USA.  */

/* Without this pragma, gcc 4.7.0 20120102 suggests that the

   init_colorize function might be candidate for attribute 'const'  */

#if (__GNUC__ == 4 && 6 <= __GNUC_MINOR__) || 4 < __GNUC__

# pragma GCC diagnostic ignored "-Wsuggest-attribute=const"

#endif

#include <config.h>

#include "colorize.h"

#include <stdio.h>

#include <stdlib.h>

#include <string.h>

#include <unistd.h>

/* Return non-zero if we should highlight matches in output to file

   descriptor FD.  */

int

should_colorize (void)

{

  char const *t = getenv ("TERM");

  return t && strcmp (t, "dumb") != 0;

}

void init_colorize (void) { }

/* Start a colorized text attribute on stdout using the SGR_START

   format; the attribute is specified by SGR_SEQ.  */

void

print_start_colorize (char const *sgr_start, char const *sgr_seq)

{

  printf (sgr_start, sgr_seq);

}

/* Restore the normal text attribute using the SGR_END string.  */

void

print_end_colorize (char const *sgr_end)

{

  fputs (sgr_end, stdout);

}