util.c

/* This file is part of dwmblocks2.
 * Copyright (C) 2024 Lucas Mior

 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero 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 Affero General Public License for more details.

 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#ifndef UTIL_C
#define UTIL_C

#include <stdarg.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>

static char *
itoa(long num, char *str) {
    int i = 0;
    bool negative = false;

    if (num < 0) {
        negative = true;
        num = -num;
    }

    do {
        str[i++] = num % 10 + '0';
        num /= 10;
    } while (num > 0);

    if (negative)
        str[i++] = '-';

    str[i] = '\0';

    for (int j = 0; j < i / 2; j++) {
        char temp = str[j];
        str[j] = str[i - j - 1];
        str[i - j - 1] = temp;
    }
    return str;
}

static void
error(char *format, ...) {
    int n;
    va_list args;
    char buffer[BUFSIZ];

    va_start(args, format);
    n = vsnprintf(buffer, sizeof (buffer) - 1, format, args);
    va_end(args);

    if (n < 0) {
        fprintf(stderr, "Error in vsnprintf()\n");
        exit(EXIT_FAILURE);
    }

    buffer[n] = '\0';
    write(STDERR_FILENO, buffer, (size_t) n);

#ifdef DEBUGGING
    switch (fork()) {
        char *notifiers[2] = { "dunstify", "notify-send" };
        case -1:
            fprintf(stderr, "Error forking: %s\n", strerror(errno));
            break;
        case 0:
            for (uint i = 0; i < LENGTH(notifiers); i += 1) {
                execlp(notifiers[i], notifiers[i], "-u", "critical", 
                                     program, buffer, NULL);
            }
            fprintf(stderr, "Error trying to exec dunstify.\n");
            break;
        default:
            break;
    }
    exit(EXIT_FAILURE);
#endif
}

#ifndef TESTING_THIS_FILE
#define TESTING_THIS_FILE 0
#endif

#if TESTING_THIS_FILE
#include <assert.h>

int
main(void) {
    assert(true);
    exit(EXIT_SUCCESS);
}

#endif

#endif