/* * Copyright (c) 2006-2021, RT-Thread Development Team * * SPDX-License-Identifier: Apache-2.0 * * Change Logs: * Date Author Notes * 2015-01-28 Bernard first version */ #include <rtthread.h> #include <LowLevelIOInterface.h> #include <unistd.h> #include <compiler_private.h> #define DBG_TAG "dlib.syscall.write" #define DBG_LVL DBG_INFO #include <rtdbg.h> /* * The "__write" function should output "size" number of bytes from * "buffer" in some application-specific way. It should return the * number of characters written, or _LLIO_ERROR on failure. * * If "buffer" is zero then __write should perform flushing of * internal buffers, if any. In this case "handle" can be -1 to * indicate that all handles should be flushed. * * The template implementation below assumes that the application * provides the function "MyLowLevelPutchar". It should return the * character written, or -1 on failure. */ #pragma module_name = "?__write" size_t __write(int handle, const unsigned char *buf, size_t len) { #ifdef DFS_USING_POSIX int size; #endif /* DFS_USING_POSIX */ if ((handle == _LLIO_STDOUT) || (handle == _LLIO_STDERR)) { #if defined(RT_USING_CONSOLE) && defined(RT_USING_DEVICE) rt_device_t console_device; console_device = rt_console_get_device(); if (console_device) { rt_device_write(console_device, 0, buf, len); } return len; /* return the length of the data written */ #else return _LLIO_ERROR; #endif /* defined(RT_USING_CONSOLE) && defined(RT_USING_DEVICE) */ } else if (handle == _LLIO_STDIN) { return _LLIO_ERROR; } else { #ifdef DFS_USING_POSIX size = write(handle, buf, len); return size; /* return the length of the data written */ #else LOG_W(_WARNING_WITHOUT_FS); return _LLIO_ERROR; #endif /* DFS_USING_POSIX */ } }