74 lines
1.6 KiB
C
74 lines
1.6 KiB
C
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/*
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* Copyright (c) 2006-2023, RT-Thread Development Team
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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* Change Logs:
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* Date Author Notes
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*/
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#include <rtthread.h>
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#include <sys/types.h>
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#include <stdio.h>
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#include <unistd.h>
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#ifdef RT_USING_POSIX_STDIO
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#include <posix/stdio.h>
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#endif /* RT_USING_POSIX_STDIO */
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#define DBG_TAG "picolibc.iob"
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#define DBG_LVL DBG_INFO
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#include <rtdbg.h>
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#ifdef TINY_STDIO
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static int __fputc(char c, FILE *file);
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static int __fgetc(FILE *file);
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static FILE __stdio_in = FDEV_SETUP_STREAM(NULL, __fgetc, NULL, _FDEV_SETUP_READ);
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static FILE __stdio_out = FDEV_SETUP_STREAM(__fputc, NULL, NULL, _FDEV_SETUP_WRITE);
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#ifdef __strong_reference
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#define STDIO_ALIAS(x) __strong_reference(stdout, x);
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#else
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#define STDIO_ALIAS(x) FILE *const x = &__stdio_out;
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#endif
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FILE *const stdin = &__stdio_in;
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FILE *const stdout = &__stdio_out;
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STDIO_ALIAS(stderr);
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static int __fputc(char c, FILE *file)
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{
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if (file == &__stdio_out)
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{
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#if defined(RT_USING_CONSOLE) && defined(RT_USING_DEVICE)
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rt_device_t console = rt_console_get_device();
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if (console)
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{
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rt_ssize_t rc = rt_device_write(console, -1, &c, 1);
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return rc > 0 ? rc : -1;
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}
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#endif /* defined(RT_USING_CONSOLE) && defined(RT_USING_DEVICE) */
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}
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return -1;
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}
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static int __fgetc(FILE *file)
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{
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if (file == &__stdio_in)
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{
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#ifdef RT_USING_POSIX_STDIO
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if (rt_posix_stdio_get_console() >= 0)
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{
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char c;
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int rc = read(STDIN_FILENO, &c, 1);
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return rc == 1 ? c : EOF;
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}
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#endif /* RT_USING_POSIX_STDIO */
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}
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return EOF;
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}
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#endif
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