82 lines
1.4 KiB
C++
82 lines
1.4 KiB
C++
#include <retarget.hpp>
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#include <errno.h>
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#include <stdio.h>
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#include <sys/stat.h>
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#include <span>
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namespace
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{
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hal::uart *uart_stdio;
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};
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void retarget::set_stdio_uart(hal::uart *uart)
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{
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uart_stdio = uart;
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/* Disable I/O buffering for STDOUT stream, so that
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* chars are sent out as soon as they are printed. */
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setvbuf(stdout, NULL, _IONBF, 0);
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}
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#define STDIN_FILENO 0
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#define STDOUT_FILENO 1
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#define STDERR_FILENO 2
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extern "C" int _write(int fd, char * ptr, int len)
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{
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if(fd == STDOUT_FILENO || fd == STDERR_FILENO)
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{
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uart_stdio->write(std::span<const char>(ptr, len));
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}
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return len;
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}
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extern "C" int _isatty(int fd)
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{
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if(fd >= STDIN_FILENO && fd <= 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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}
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extern "C" int _close(int fd)
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{
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if(fd >= STDIN_FILENO && fd <= STDERR_FILENO)
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return 0;
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errno = EBADF;
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return -1;
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}
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extern "C" int _lseek(int fd, int ptr, int dir)
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{
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(void)fd;
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(void)ptr;
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(void)dir;
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errno = EBADF;
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return -1;
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}
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extern "C" int _read(int fd, char *ptr, int len)
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{
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return -1;
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}
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int _fstat(int fd, struct stat *st)
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{
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if(fd >= STDIN_FILENO && fd <= STDERR_FILENO)
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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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errno = EBADF;
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return 0;
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}
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