/* handle escape characters, writing to output */
void cook_buf(int fd, char *buf, int num) {
int current = 0;
if (in_escape) {
/* cook_buf last called with an incomplete escape sequence */
switch (help_state) {
case 0:
help_send_escape(fd, buf[0]);
break;
case 1:
help_set_terminal(fd, buf[0]);
break;
default:
help_set_speed(fd, buf[0]);
}
num--; /* advance to the next character in the buffer */
buf++;
}
while (current < num) { /* big while loop, to process all the charactes in buffer */
/* look for the next escape character '~' */
while ((current < num) && (buf[current] != 0x7e)) current++;
/* and write the sequence before esc char to the comm port */
if (current) {
DEBUG_DUMP_MEMORY(buf,current);
const ssize_t written = write (fd, buf, current);
if (written == -1) {
const int error = errno;
ERROR_MSG("error writting to device %d (%m)",error);
} else if (written != current) {
ERROR_MSG("error writting to device only %d bytes written",written);
}
}
if (current < num) { /* process an escape sequence */
/* found an escape character */
if (help_state == 0) {
help_escape();
}
current++;
if (current >= num) {
/* interpret first character of next sequence */
in_escape = 1;
return;
}
switch (help_state) {
case 0:
help_send_escape(fd, buf[current]);
break;
case 1:
help_set_terminal(fd, buf[current]);
break;
default:
help_set_speed(fd, buf[current]);
} /* end switch */
current++;
if (current >= num)
return;
} /* if - end of processing escape sequence */
num -= current;
buf += current;
current = 0;
} /* while - end of processing all the charactes in the buffer */
return;
}
/* handle escape characters, writing to output */
void cook_buf(struct ios_ops *ios, unsigned char *buf, int num)
{
int current = 0;
if (in_escape) {
/* cook_buf last called with an incomplete escape sequence */
switch (help_state) {
case 0:
help_send_escape(ios, buf[0]);
break;
case 1:
help_set_terminal(ios, buf[0]);
break;
default:
help_set_speed(ios, buf[0]);
}
num--; /* advance to the next character in the buffer */
buf++;
}
while (current < num) { /* big while loop, to process all the charactes in buffer */
/* look for the next escape character '~' */
while ((current < num) && (buf[current] != 28))
current++;
/* and write the sequence befor esc char to the comm port */
if (current)
{
if (in_echo)
{
write(STDOUT_FILENO, buf, current); /* echo */
}
if (!in_line)
write(ios->fd, buf, current);
else
writeline(ios->fd, buf, current);
}
if (current < num) { /* process an escape sequence */
/* flush buffers */
fflush(stdout);
if (in_line)
flushline(ios->fd);
/* found an escape character */
if (help_state == 0)
help_escape();
current++;
if (current >= num) {
/* interpret first character of next sequence */
in_escape = 1;
return;
}
switch (help_state) {
case 0:
help_send_escape(ios, buf[current]);
break;
case 1:
help_set_terminal(ios, buf[current]);
break;
default:
help_set_speed(ios, buf[current]);
} /* end switch */
current++;
if (current >= num)
return;
} /* if - end of processing escape sequence */
num -= current;
buf += current;
current = 0;
} /* while - end of processing all the charactes in the buffer */
return;
}
