117 lines
2.6 KiB
C
117 lines
2.6 KiB
C
#include <errno.h>
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#include <stdio.h>
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#include <sys/stat.h>
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#include <sys/unistd.h>
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#include "common.h"
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#include "uart.h"
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#undef errno
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extern int errno;
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#define OUTPUT_PRINTF 0
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/******************************************************************************
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*
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******************************************************************************/
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void stdio_setup(void)
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{
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#if OUTPUT_PRINTF
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// Turn off buffers, so I/O occurs immediately
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setvbuf(stdin, NULL, _IONBF, 0);
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setvbuf(stdout, NULL, _IONBF, 0);
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setvbuf(stderr, NULL, _IONBF, 0);
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#endif
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}
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/******************************************************************************
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*
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******************************************************************************/
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int _read(int file, char *data, int len)
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{
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int bytes_read = 0;
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#if OUTPUT_PRINTF
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if (file != STDIN_FILENO)
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{
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errno = EBADF;
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return -1;
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}
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for (bytes_read = 0; bytes_read < len; bytes_read++)
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{
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*data = (char)UART_GetChar(TERM_PORT);
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data++;
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}
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#endif
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return bytes_read;
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}
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/******************************************************************************
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*
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******************************************************************************/
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int _write(int file, char *data, int len)
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{
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int bytes_written = 0;
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#if OUTPUT_PRINTF
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if ((file != STDOUT_FILENO) && (file != STDERR_FILENO))
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{
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errno = EBADF;
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return -1;
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}
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for (bytes_written = 0; bytes_written < len; bytes_written++)
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{
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UART_PutChar(TERM_PORT, *data);
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data++;
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}
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#endif
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return bytes_written;
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}
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/******************************************************************************
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*
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******************************************************************************/
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int _close(int file)
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{
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return -1;
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}
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/******************************************************************************
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*
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******************************************************************************/
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int _lseek(int file, int ptr, int dir)
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{
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return 0;
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}
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/******************************************************************************
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*
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******************************************************************************/
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int _fstat(int file, struct stat *st)
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{
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st->st_mode = S_IFCHR;
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return 0;
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}
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/******************************************************************************
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*
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******************************************************************************/
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int _isatty(int file)
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{
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if ((file == STDOUT_FILENO) ||
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(file == STDIN_FILENO) ||
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(file == STDERR_FILENO))
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{
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return 1;
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}
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errno = EBADF;
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return 0;
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} |