/*
* Read arbitrary number of chars from FIFO. Must conform to
* function definition that is passed to the function
* sbp_process().
* Returns the number of characters successfully read.
*/
u32 fifo_read(u8 *buff, u32 n, void *context) {
int i;
for (i=0; i<n; i++)
if (!fifo_read_char((char *)(buff + i)))
break;
return i;
}
// get's a y or n response, writes non-0 to target if yes
// returns OK/ABORT/TIMEOUT
// abort only occurs if ESC is hit, in which case target is not modified
static enum input_result_enum getyn(char* target)
{
enum input_result_enum success;
char tempchar;
char finished=FALSE;
do
{
//wait for input or timeout
time=INPUT_PROMPT_TIME/TIMER_TICK;
while(time && (console_fifo_tx.empty == TRUE))
main_fly();
if(console_fifo_tx.empty == TRUE)
{
success=INPUT_RESULT_TIMEOUT;
finished=TRUE;
}
else
{
tempchar=fifo_read_char(&console_fifo_tx);
if(tempchar=='y' || tempchar=='Y')
{
if(console_echo)
TEXTOUT_CHAR(tempchar);
*target=TRUE;
finished=TRUE;
success=INPUT_RESULT_OK;
}
else if(tempchar=='n' || tempchar=='N')
{
if(console_echo)
TEXTOUT_CHAR(tempchar);
*target=FALSE;
finished=TRUE;
success=INPUT_RESULT_OK;
}
else if(tempchar==0x1B)
{
finished=TRUE;
success=INPUT_RESULT_ABORTED;
};
};
}while(!finished);
TEXTOUT_P(PSTR("\r\n"));
return success;
}
// get's a line from input, terminates at CR, ignores outside 0x20-0x7E, writes it to *buffer
// returns OK/ABORT/TIMEOUT, does NOT return INPUT_RESULT_NIL, as an empty line is a valid entry.
// abort only occurs if ESC is hit, in which case buffer is terminated string of length 0
// a line input length of 0 is a valid entry (returns OK)
// maxlen includes terminator, must be non0
// attempting to enter text longer than maxlen-1 will simply return a truncated string once CR is received
// if echo is enabled chars will not be echo'd beyond maxlen-1
static enum input_result_enum getline(char* buffer, int maxlen)
{
enum input_result_enum success;
int index=0; //indexes terminator in buffer
char tempchar;
char finished=FALSE;
buffer[index]=0;
do
{
//wait for input or timeout
time=(INPUT_PROMPT_TIME/TIMER_TICK);
while( time && (console_fifo_tx.empty == TRUE) )
main_fly();
if(console_fifo_tx.empty == TRUE)
{
buffer[0]=0;
success=INPUT_RESULT_TIMEOUT;
finished=TRUE;
}
else
{
tempchar=fifo_read_char(&console_fifo_tx);
//abort (esc)
if(tempchar==0x1B)
{
buffer[0]=0;
success=INPUT_RESULT_ABORTED;
finished=TRUE;
}
//backspace
else if(tempchar==0x08 && index)
{
if(console_echo)
TEXTOUT_P(PSTR("\x08 \x08"));
buffer[--index]=0;
}
//text
else if(0x1F < tempchar && tempchar < 0x7F)
{
if(index<maxlen-1)
{
if(console_echo)
TEXTOUT_CHAR(tempchar);
buffer[index++]=tempchar;
buffer[index]=0;
};
}
//CR
else if(tempchar=='\r')
{
finished=TRUE;
success=INPUT_RESULT_OK;
};
};
} while(!finished);
if(console_echo)
{
TEXTOUT_P(PSTR("\r\n"));
};
return success;
}
