adf3764857
git-subtree-dir: contrib/wireguard-tools git-subtree-mainline:9142a2a37bgit-subtree-split:7e00bf8773
77 lines
1.3 KiB
C
77 lines
1.3 KiB
C
// SPDX-License-Identifier: GPL-2.0 OR MIT
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/*
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* Copyright (C) 2015-2020 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
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*/
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#include <stdarg.h>
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#include <stddef.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <stdbool.h>
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#include <unistd.h>
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#include "ctype.h"
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#include "terminal.h"
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static bool color_mode(void)
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{
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static int mode = -1;
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const char *var;
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if (mode != -1)
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return mode;
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var = getenv("WG_COLOR_MODE");
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if (var && !strcmp(var, "always"))
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mode = true;
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else if (var && !strcmp(var, "never"))
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mode = false;
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else
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mode = isatty(fileno(stdout));
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return mode;
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}
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static void filter_ansi(const char *fmt, va_list args)
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{
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char *str = NULL;
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size_t len, i, j;
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if (color_mode()) {
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vfprintf(stdout, fmt, args);
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return;
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}
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len = vasprintf(&str, fmt, args);
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if (len >= 2) {
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for (i = 0; i < len - 2; ++i) {
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if (str[i] == '\x1b' && str[i + 1] == '[') {
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str[i] = str[i + 1] = '\0';
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for (j = i + 2; j < len; ++j) {
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if (char_is_alpha(str[j]))
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break;
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str[j] = '\0';
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}
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str[j] = '\0';
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}
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}
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}
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for (i = 0; i < len; i = j) {
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fputs(&str[i], stdout);
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for (j = i + strlen(&str[i]); j < len; ++j) {
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if (str[j] != '\0')
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break;
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}
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}
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free(str);
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}
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void terminal_printf(const char *fmt, ...)
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{
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va_list args;
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va_start(args, fmt);
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filter_ansi(fmt, args);
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va_end(args);
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}
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