157 lines
3.4 KiB
C
157 lines
3.4 KiB
C
/*
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* Copyright (c) 2006-2018, 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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* 2017/10/15 bernard the first version
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*/
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/**
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* @file stdio.c
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* @brief support newlib stdio
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* @version 1.0
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* @author AIIT XUOS Lab
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* @date 2020-09-23
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*/
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/*************************************************
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File name: stdio.c
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Description: support newlib stdio
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Others: take RT-Thread v4.0.2/components/libc/compilers/newlib/stdio.c for references
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https://github.com/RT-Thread/rt-thread/tree/v4.0.2
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History:
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1. Date: 2020-09-23
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Author: AIIT XUOS Lab
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Modification: Use set and get console functions
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*************************************************/
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#include <xiuos.h>
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#include <device.h>
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#include <stdio.h>
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#include <stdlib.h>
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#define STDIO_DEVICE_NAME_MAX 32
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static FILE* std_console = NULL;
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/**
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* This function will set system console device.
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*
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* @param device_name the name of device
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* @param mode the mode
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*
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* @return file number on success; or -1 on failure
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*/
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int LibcStdioSetConsole(const char* device_name, int mode)
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{
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FILE *fp;
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char name[STDIO_DEVICE_NAME_MAX];
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char *file_mode;
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snprintf(name, sizeof(name) - 1, "/dev/%s", device_name);
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name[STDIO_DEVICE_NAME_MAX - 1] = '\0';
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switch (mode)
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{
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case O_RDWR:
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file_mode = "r+";
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break;
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case O_WRONLY:
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file_mode = "wb";
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break;
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default:
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file_mode = "rb";
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break;
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}
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/* try to open file */
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fp = fopen(name, file_mode);
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if (fp)
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{
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/* set the fp buffer */
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setvbuf(fp, NULL, _IONBF, 0);
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if (std_console)
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/* try to close console device */
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fclose(std_console);
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std_console = fp;
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if (mode == O_RDWR)
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{
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/* set _stdin as std_console */
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_GLOBAL_REENT->_stdin = std_console;
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}
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else
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{
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/* set NULL */
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_GLOBAL_REENT->_stdin = NULL;
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}
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if (mode == O_RDONLY)
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{
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/* set the _stdout as NULL */
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_GLOBAL_REENT->_stdout = NULL;
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/* set the _stderr as NULL */
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_GLOBAL_REENT->_stderr = NULL;
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}
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else
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{
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/* set the _stdout as std_console */
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_GLOBAL_REENT->_stdout = std_console;
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/* set the _stderr as std_console */
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_GLOBAL_REENT->_stderr = std_console;
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}
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/* set the __sdidinit as 1 */
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_GLOBAL_REENT->__sdidinit = 1;
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}
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if (std_console)
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/* return the file number */
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return fileno(std_console);
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/* failure and return -1 */
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return -1;
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}
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/**
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* This function will get system console device.
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*
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* @return file number on success; or -1 on failure
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*/
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int LibcStdioGetConsole(void) {
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if (std_console)
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/* return the file number */
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return fileno(std_console);
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else
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/* failure and return -1 */
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return -1;
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}
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/**
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* This function will initialize the c library system.
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*
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* @return 0
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*/
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int LibcSystemInit(void)
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{
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#if defined(KERNEL_CONSOLE)
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HardwareDevType console;
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/* try to get console device */
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console = ObtainConsole();
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if (console)
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{
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#if defined(LIB_POSIX)
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/* set console device mode */
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LibcStdioSetConsole(console->dev_name, O_RDWR);
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#else
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/* set console device mode */
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LibcStdioSetConsole(console->dev_name, O_WRONLY);
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#endif
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}
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#endif
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return 0;
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}
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