admc/attic/platform_linux.c

/* This file is part of asmc, a bootstrapping OS with minimal seed
   Copyright (C) 2018 Giovanni Mascellani <gio@debian.org>
   https://gitlab.com/giomasce/asmc

   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 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, see <https://www.gnu.org/licenses/>. */

#include <stdlib.h>
#include <fcntl.h>
#include <unistd.h>

#include "platform.h"

__attribute__((noreturn)) void platform_panic() {
  abort();
}

void platform_exit() {
  exit(0);
}

int platform_open_file(char *fname) {
  int ret = open(fname, O_RDONLY);
  if (ret < 0) {
    platform_panic();
  }
  return ret;
}

int platform_reset_file(int fd) {
  int res = lseek(fd, 0, SEEK_SET);
  if (res < 0) {
    platform_panic();
  }
}

int platform_read_char(int fd) {
  int buf = 0;
  int ret = read(fd, &buf, 1);
  if (ret == 0) {
    return -1;
  }
  if (ret != 1) {
    platform_panic();
  }
  return buf;
}

void platform_write_char(int fd, int c) {
  int buf = c;
  int ret = write(fd, &buf, 1);
  if (ret != 1) {
    platform_panic();
  }
}

void platform_log(int fd, char *s) {
  while (*s != '\0') {
    platform_write_char(fd, *s);
    s++;
  }
}

void *platform_allocate(int size) {
  return malloc(size);
}