/*!
 * @file	syscalls.c
 * Implements some base-level for libc for heap management and printing on
 * the debug port.
 */

#include <errno.h>
#include <fcntl.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <unistd.h>

#include <boardconfig.h>
#include <hardware_init.h>

#define AUTO_RETURN_AFTER_NEWLINE 1

// _write currently adds \n after \r automatically.
// If the At91lib\utility\stdio.c printf implementation is not used anymore:
// remove if there are spurious newlines!

// int _read(int file, void *ptr, size_t len) {
//	(void)len;
//	if(file <= STDERR_FILENO) {
//		*(char *) ptr = DBGU_GetChar();
//#if AUTO_RETURN_AFTER_NEWLINE
//		if((*(char *) ptr != '\n') && (*(char *) ptr != '\r')) {
//			DBGU_PutChar(*(char *) ptr);
//		}
//		else if(*(char *) ptr == '\r') {
//			DBGU_PutChar('\n');
//			DBGU_PutChar('\r');
//		}
//#endif
//		return 1;
//	}
//	else {
//		return -1;
//	}
//
// }

int _write(int file, const void *ptr, size_t len) {
  size_t i;

  if (file <= STDERR_FILENO) {
    for (i = 0; i < len; i++) {
#if AUTO_RETURN_AFTER_NEWLINE
      if (((const char *)ptr)[i] == '\n' &&
          ((const char *)ptr)[i + 1] != '\r') {
        HAL_UART_Transmit(&huart3, (uint8_t *)"\r", 1, DEBUG_UART_MS_TIMEOUT);
      }
#endif
      const uint8_t *character = (const uint8_t *)ptr;
      HAL_UART_Transmit(&huart3, (const uint8_t *)(character + i), 1,
                        DEBUG_UART_MS_TIMEOUT);
    }
    return len;
  } else {
    return -1;
  }
}

int _lseek(int file, int ptr, int dir) {
  (void)file;
  (void)ptr;
  (void)dir;
  return 0;
}

int _close(int file) {
  (void)file;
  return -1;
}

int _open(const char *name, int flags, ...) {
  (void)name;
  (void)flags;
  return -1;
}

int _link(const char *oldpath, const char *newpath) {
  (void)oldpath;
  (void)newpath;
  return -1;
}

int _rename(const char *oldpath, const char *newpath) {
  (void)oldpath;
  (void)newpath;
  return -1;
}

int _unlink(const char *pathname) {
  (void)pathname;
  return -1;
}

int fsync(int fd) {
  (void)fd;
  return -1;
}

int _fstat(int fd, struct stat *st) {
  (void)fd;
  (void)st;
  return -1;
}

int _stat(const char *path, struct stat *st) {
  (void)path;
  (void)st;
  return -1;
}

int _isatty(int fd) {
  if (fd <= STDERR_FILENO) {
    return 1;
  } else {
    return 0;
  }
}

void exit(int n) {
  printf("\n\r EXITING WITH CODE: %u \n\r", n);
  // restart();
  while (1)
    ;
}

void _exit(int n) {
  printf("\n\r EXITING WITH CODE: %u \n\r", n);
  // restart();
  while (1)
    ;
}

int _kill() { return -1; }

int _getpid() { return 1; }

int _gettimeofday() { return -1; }