gem-graph-client/include/base.h

/*
 *      Gem-graph OpenGL experiments
 *
 *      Desc: Base header
 *
 *  Copyright (C) 2023 Arthur Menges <arthur.menges@a-lec.org>
 *  Copyright (C) 2023 Adrien Bourmault <neox@a-lec.org>
 *
 *  This file is part of Gem-graph.
 *
 *  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/>.
 */

#pragma once
#include <stdio.h>
#include <stdlib.h>
#include <stdbool.h>
#include <fcntl.h>
#include <unistd.h>
#include <errno.h>

enum
{
    X_AXIS,
    Y_AXIS,
    Z_AXIS,

    N_AXIS
};

/*
 * Read a file from filename into a provided buffer
 *
 * @param   filename, file name
 *          contents, target ptr
 *
 * @return  void
 */
static inline char *read_file(char *filename)
{
    int fd;
    int filesize;
    char *contents;

    fd = open(filename, O_RDONLY);
    if(fd < 0) {
        printf("Couldn't read file: %s\n",filename);
        return NULL;
    }

    filesize = lseek(fd, 0, SEEK_END) + 1 ;
    contents = malloc(filesize * sizeof(char));

    if (contents == NULL) {
        perror("Not enough memory to allocate file");
        return NULL;
    }

    lseek(fd, 0, SEEK_SET);
    read(fd,contents,filesize);

    contents[filesize-1] = '\0';

    close(fd);

    return contents;
}