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/*
* Copyright (c) 2019-2020 Arm Limited. All rights reserved.
*
* SPDX-License-Identifier: Apache-2.0
*
* Licensed under the Apache License, Version 2.0 (the License); you may
* not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an AS IS BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include "uart.h"
// armclang retargeting
#if defined(__ARMCC_VERSION) && (__ARMCC_VERSION >= 6100100)
#include <rt_misc.h>
#include <rt_sys.h>
/* Standard IO device handles. */
#define STDIN 0x8001
#define STDOUT 0x8002
#define STDERR 0x8003
#define RETARGET(fun) _sys##fun
#else
/*
* This type is used by the _ I/O functions to denote an open
* file.
*/
typedef int FILEHANDLE;
/*
* Open a file. May return -1 if the file failed to open.
*/
extern FILEHANDLE _open(const char * /*name*/, int /*openmode*/);
/* Standard IO device handles. */
#define STDIN 0x00
#define STDOUT 0x01
#define STDERR 0x02
#define RETARGET(fun) fun
#endif
/* Standard IO device name defines. */
const char __stdin_name[] __attribute__((aligned(4))) = "STDIN";
const char __stdout_name[] __attribute__((aligned(4))) = "STDOUT";
const char __stderr_name[] __attribute__((aligned(4))) = "STDERR";
void _ttywrch(int ch) {
(void)fputc(ch, stdout);
}
FILEHANDLE RETARGET(_open)(const char *name, int openmode) {
(void)openmode;
if (strcmp(name, __stdin_name) == 0) {
return (STDIN);
}
if (strcmp(name, __stdout_name) == 0) {
return (STDOUT);
}
if (strcmp(name, __stderr_name) == 0) {
return (STDERR);
}
return -1;
}
int RETARGET(_write)(FILEHANDLE fh, const unsigned char *buf, unsigned int len, int mode) {
(void)mode;
switch (fh) {
case STDOUT:
case STDERR: {
int c;
while (len-- > 0) {
c = fputc(*buf++, stdout);
if (c == EOF) {
return EOF;
}
}
return 0;
}
default:
return EOF;
}
}
int RETARGET(_read)(FILEHANDLE fh, unsigned char *buf, unsigned int len, int mode) {
(void)mode;
switch (fh) {
case STDIN: {
int c;
while (len-- > 0) {
c = fgetc(stdin);
if (c == EOF) {
return EOF;
}
*buf++ = (unsigned char)c;
}
return 0;
}
default:
return EOF;
}
}
int RETARGET(_istty)(FILEHANDLE fh) {
switch (fh) {
case STDIN:
case STDOUT:
case STDERR:
return 1;
default:
return 0;
}
}
int RETARGET(_close)(FILEHANDLE fh) {
if (RETARGET(_istty(fh))) {
return 0;
}
return -1;
}
int RETARGET(_seek)(FILEHANDLE fh, long pos) {
(void)fh;
(void)pos;
return -1;
}
int RETARGET(_ensure)(FILEHANDLE fh) {
(void)fh;
return -1;
}
long RETARGET(_flen)(FILEHANDLE fh) {
if (RETARGET(_istty)(fh)) {
return 0;
}
return -1;
}
int RETARGET(_tmpnam)(char *name, int sig, unsigned maxlen) {
(void)name;
(void)sig;
(void)maxlen;
return 1;
}
char *RETARGET(_command_string)(char *cmd, int len) {
(void)len;
return cmd;
}
void RETARGET(_exit)(int return_code) {
exit(return_code);
}
int system(const char *cmd) {
(void)cmd;
return 0;
}
time_t time(time_t *timer) {
time_t current;
current = 0; // To Do !! No RTC implemented
if (timer != NULL) {
*timer = current;
}
return current;
}
void _clock_init(void) {
#if 0
// Example implementation based on SysTick
// For instance, use a counting var in a SysTick interrupt handler
// for clock() to use
SysTick->LOAD = (uint32_t) ((SystemCoreClock/100)-1UL);
NVIC_SetPriority (SysTick_IRQn, (1UL << __NVIC_PRIO_BITS) - 1UL);
SysTick->VAL = 0UL;
SysTick->CTRL = SysTick_CTRL_CLKSOURCE_Msk | SysTick_CTRL_TICKINT_Msk | SysTick_CTRL_ENABLE_Msk;
#endif
}
clock_t clock(void) {
return (clock_t)-1;
}
int remove(const char *arg) {
(void)arg;
return 0;
}
int rename(const char *oldn, const char *newn) {
(void)oldn;
(void)newn;
return 0;
}
void exit(int code) {
uart_putc((char)0x4);
uart_putc((char)code);
while (1) {}
}
int fputc(int ch, FILE *f) {
(void)(f);
return uart_putc(ch);
}
int fgetc(FILE *f) {
(void)f;
return uart_putc(uart_getc());
}
#ifndef ferror
/* arm-none-eabi-gcc with newlib uses a define for ferror */
int ferror(FILE *f) {
(void)f;
return EOF;
}
#endif
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