int FGETC(FILE *f)
{
if ((stdout == f) || (stderr == f))
{
return 0;
}
else if (stdin == f)
{
if (!appio_dummy)
{
uint32_t size;
do
{
usb_protocol_poll();
size = vsf_fifo_get_data_length(&shell_stream.stream_tx.fifo);
} while (!size);
return vsf_fifo_pop8(&shell_stream.stream_tx.fifo);
}
}
else
{
struct appio_file_t *file = appio_file_byfn(f);
if (file != NULL)
{
return file->pos >= file->size ? EOF : file->addr[file->pos++];
}
}
return 0;
}
int FFLUSH(FILE *f)
{
if ((stdout == f) || (stderr == f))
{
if (!appio_dummy)
{
app_io_out_sync();
}
return 0;
}
else if (stdin == f)
{
if (!appio_dummy)
{
uint32_t i, size = vsf_fifo_get_data_length(&shell_stream.stream_tx.fifo);
for (i = 0; i < size; i++)
{
vsf_fifo_pop8(&shell_stream.stream_tx.fifo);
}
}
return 0;
}
else
{
struct appio_file_t *file = appio_file_byfn(f);
if (file != NULL)
{
// TODO: flush appio_file
}
}
return 0;
}
int32_t comm_flush_usbtocomm(void)
{
if (!usbtocomm_open)
{
return -1;
}
while (vsf_fifo_get_data_length(&usart_stream_p0.stream_tx.fifo) > 0)
{
usart_stream_poll(&usart_stream_p0);
}
while (vsf_fifo_get_data_length(&usart_stream_p0.stream_rx.fifo) > 0)
{
vsf_fifo_pop8(&usart_stream_p0.stream_rx.fifo);
usart_stream_poll(&usart_stream_p0);
}
return 0;
}
char* FGETS(char *buf, int count, FILE *f)
{
char cur_char, *result = buf;
int size = 0, cur_size, pos;
if ((NULL == buf) || (NULL == f) || (stdout == f) || (stderr == f))
{
return NULL;
}
if (stdin == f)
{
if (!appio_dummy)
{
#if HW_HAS_LCM
char vsprog_ui_buf[2];
#endif
pos = 0;
cur_char = '\0';
while ((size < count) && (cur_char != '\r'))
{
usb_protocol_poll();
cur_size = vsf_fifo_get_data_length(&shell_stream.stream_tx.fifo);
while (cur_size && (size < count) && (cur_char != '\r'))
{
cur_char = (char)vsf_fifo_pop8(&shell_stream.stream_tx.fifo);
if ('\r' == cur_char)
{
vsf_fifo_push8(&shell_stream.stream_rx.fifo, '\n');
#if HW_HAS_LCM
vsprog_ui_print("\n\0");
#endif
}
else if ('\b' == cur_char)
{
if (pos)
{
vsf_fifo_push8(&shell_stream.stream_rx.fifo, '\b');
vsf_fifo_push8(&shell_stream.stream_rx.fifo, ' ');
vsf_fifo_push8(&shell_stream.stream_rx.fifo, '\b');
#if HW_HAS_LCM
vsprog_ui_print("\b \b\0");
#endif
pos--;
}
cur_size--;
continue;
}
else if (!((cur_char >= ' ') && (cur_char <= '~')))
{
cur_size--;
continue;
}
vsf_fifo_push8(&shell_stream.stream_rx.fifo, (uint8_t)cur_char);
#if HW_HAS_LCM
vsprog_ui_buf[0] = cur_char;
vsprog_ui_buf[1] = '\0';
vsprog_ui_print(vsprog_ui_buf);
#endif
buf[pos++] = cur_char;
size++;
cur_size--;
}
}
buf[pos] = '\0';
app_io_out_sync();
}
else
{
return NULL;
}
}
else
{
struct appio_file_t *file = appio_file_byfn(f);
if (file != NULL)
{
if (count < 3)
{
return NULL;
}
count -= 3;
while ((file->addr[file->pos] != '\0') &&
(file->addr[file->pos] != 0xFF) &&
(file->pos < file->size) &&
((file->addr[file->pos] == '\n') ||
(file->addr[file->pos] == '\r')))
{
file->pos++;
}
while (count-- &&
(file->pos < file->size) &&
(file->addr[file->pos] != '\0') &&
(file->addr[file->pos] != '\n') &&
(file->addr[file->pos] != '\r') &&
(file->addr[file->pos] != 0xFF))
{
*buf++ = file->addr[file->pos++];
}
if (result == buf)
{
return NULL;
}
*buf++ = '\n';
*buf++ = '\r';
*buf++ = '\0';
}
}
return result;
}
