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/*
* terminal printing routines
*
* Copyright (C) 2014-2018 LastPass.
*
* 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 2 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, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
* In addition, as a special exception, the copyright holders give
* permission to link the code of portions of this program with the
* OpenSSL library under certain conditions as described in each
* individual source file, and distribute linked combinations
* including the two.
*
* You must obey the GNU General Public License in all respects
* for all of the code used other than OpenSSL. If you modify
* file(s) with this exception, you may extend this exception to your
* version of the file(s), but you are not obligated to do so. If you
* do not wish to do so, delete this exception statement from your
* version. If you delete this exception statement from all source
* files in the program, then also delete it here.
*
* See LICENSE.OpenSSL for more details regarding this exception.
*/
#include "terminal.h"
#include "util.h"
#include <string.h>
#include <ctype.h>
#include <unistd.h>
#include <stdarg.h>
#include <stdio.h>
static enum color_mode color_mode = COLOR_MODE_AUTO;
static void filter_ansi(FILE *file, const char *fmt, va_list args)
{
_cleanup_free_ char *str = NULL;
size_t len, i, j;
if (color_mode == COLOR_MODE_ALWAYS ||
(color_mode == COLOR_MODE_AUTO && isatty(fileno(file)))) {
vfprintf(file, fmt, args);
return;
}
len = xvasprintf(&str, fmt, args);
for (i = 0; len >= 2 && i < len - 2; ++i) {
if (str[i] == '\x1b' && str[i + 1] == '[') {
str[i] = str[i + 1] = '\0';
for (j = i + 2; j < len; ++j) {
if (isalpha(str[j]))
break;
str[j] = '\0';
}
str[j] = '\0';
}
}
for (i = 0; i < len; i = j) {
fputs(&str[i], file);
for (j = i + strlen(&str[i]); j < len; ++j) {
if (str[j] != '\0')
break;
}
}
}
void terminal_set_color_mode(enum color_mode mode)
{
color_mode = mode;
}
void terminal_printf(const char *fmt, ...)
{
va_list args;
va_start(args, fmt);
filter_ansi(stdout, fmt, args);
va_end(args);
}
void terminal_fprintf(FILE *file, const char *fmt, ...)
{
va_list args;
va_start(args, fmt);
filter_ansi(file, fmt, args);
va_end(args);
}
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