INode * REParser::parseCharSequence(std::string::const_iterator & c, const std::string::const_iterator & end)
{
FinalSequence * ret = 0;
if (*c == '^')
{
++c;
if (c != end && *c == ']')
throw std::string("Empty character sequence []");
ret = new FinalNotSequence;
}
else
ret = new FinalOrSequence;
while (c != end && *c != ']')
{
if (*c == '[')
{
++c;
if (c != end && *c == ':')
{
++c;
addClassToSequence(c, end, ret);
continue ;
}
else
--c;
}
char rStart = getAChar(c, end);
if (*c == '.')
{
++c;
if (c != end && *c == '.')
{
++c;
if (c == end)
throw std::string("Incomplete character range");
char rEnd = getAChar(c, end);
if (rStart >= rEnd)
throw std::string("Incorrect character range");
ret->addRange(rStart, rEnd);
continue ;
}
else
--c;
}
ret->addChar(rStart);
}
if (c == end)
throw std::string("Incomplete character sequence");
return ret;
}
INode * REParser::getAFinal(std::string::const_iterator & c, const std::string::const_iterator & end)
{
if (*c == '.')
{
++c;
return new FinalAny;
}
return new FinalChar(getAChar(c, end));
}
int
gettoken(void)
{
while ((tval = getAChar()) == REDRAWTOKEN)
{
redraw();
}
if (isdigit(tval))
return (NUMTOKEN);
else if (isalpha(tval))
return (ALPHATOKEN);
else
return (tval);
}
gettoken()
{
while ((tval = getAChar()) == REDRAWTOKEN || tval == SHELLTOKEN)
{
if (tval == SHELLTOKEN)
{
#ifdef BSD
struct itimerval itv;
itv.it_value.tv_sec = 0;
itv.it_value.tv_usec = 0;
setitimer(ITIMER_REAL, &itv, NULL);
#endif
#ifdef SYSV
int aval;
aval = alarm(0);
#endif
if (fork() == 0) /* child */
{
char *shell, *base, *getenv(), *strrchr();
setuid(getuid()); /* turn off setuid bit */
done_screen();
/* run user's favorite shell */
if ((shell = getenv("SHELL")) != NULL)
{
base = strrchr(shell, '/');
if (base == NULL)
base = shell;
else
base++;
execl(shell, base, 0);
}
else
execl(_PATH_BSHELL, "sh", 0);
exit(0); /* oops */
}
wait(0);
#ifdef BSD
ioctl(fileno(stdin), TIOCSETP, &tty_new);
itv.it_value.tv_sec = 0;
itv.it_value.tv_usec = 1;
itv.it_interval.tv_sec = sp->update_secs;
itv.it_interval.tv_usec = 0;
setitimer(ITIMER_REAL, &itv, NULL);
#endif
#ifdef SYSV
ioctl(fileno(stdin), TCSETAW, &tty_new);
alarm(aval);
#endif
}
redraw();
}
if (isdigit(tval))
return (NUMTOKEN);
else if (isalpha(tval))
return (ALPHATOKEN);
else
return (tval);
}
