74 lines
1.8 KiB
C
74 lines
1.8 KiB
C
/*
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* Copyright (c) 2006-2021, 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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* 2015-01-28 Bernard first version
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*/
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#include <rtthread.h>
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#include <LowLevelIOInterface.h>
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#include <unistd.h>
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#ifdef RT_USING_POSIX_STDIO
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#include "libc.h"
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#endif
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#define DBG_TAG "dlib.syscall_write"
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#define DBG_LVL DBG_INFO
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#include <rtdbg.h>
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/*
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* The "__write" function should output "size" number of bytes from
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* "buffer" in some application-specific way. It should return the
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* number of characters written, or _LLIO_ERROR on failure.
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*
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* If "buffer" is zero then __write should perform flushing of
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* internal buffers, if any. In this case "handle" can be -1 to
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* indicate that all handles should be flushed.
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*
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* The template implementation below assumes that the application
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* provides the function "MyLowLevelPutchar". It should return the
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* character written, or -1 on failure.
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*/
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#pragma module_name = "?__write"
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size_t __write(int handle, const unsigned char *buf, size_t len)
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{
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#ifdef RT_USING_POSIX
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int size;
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#endif /* RT_USING_POSIX */
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if ((handle == _LLIO_STDOUT) || (handle == _LLIO_STDERR))
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{
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#ifdef RT_USING_CONSOLE
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rt_device_t console_device;
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console_device = rt_console_get_device();
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if (console_device)
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{
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rt_device_write(console_device, 0, buf, len);
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}
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return len; /* return the length of the data written */
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#else
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return _LLIO_ERROR;
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#endif /* RT_USING_CONSOLE */
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}
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else if (handle == _LLIO_STDIN)
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{
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return _LLIO_ERROR;
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}
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else
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{
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#ifdef RT_USING_POSIX
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size = write(handle, buf, len);
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return size; /* return the length of the data written */
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#else
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return _LLIO_ERROR;
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#endif /* RT_USING_POSIX */
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}
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}
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