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| #include <iostream>
#include <string>
#include <cassert>
#include <climits>
#include <cstdio>
#include <cstring>
#include <termios.h>
#include <unistd.h>
class Termios {
public:
explicit Termios (int fd)
: myFd(fd) {
assert(tcgetattr(myFd, &myStart) == 0);
assert(tcgetattr(myFd, &myCurrent) == 0);
reset();
}
struct input {
enum {
ignbrk = IGNBRK,
brkint = BRKINT,
ignpar = IGNPAR,
parmrk = PARMRK,
inpck = INPCK,
istrip = ISTRIP,
inlcr = INLCR,
igncr = IGNCR,
icrnl = ICRNL,
ixon = IXON,
ixoff = IXOFF,
ixany = IXANY,
imaxbel = IMAXBEL,
};
};
struct output {
enum {
opost = OPOST,
onlcr = ONLCR,
ocrnl = OCRNL,
oxtabs = OXTABS,
onoeot = ONOEOT,
onocr = ONOCR,
onlret = ONLRET,
};
};
struct control {
enum {
csize = CSIZE,
cs5 = CS5,
cs6 = CS6,
cs7 = CS7,
cs8 = CS8,
cstopb = CSTOPB,
cread = CREAD,
parenb = PARENB,
parodd = PARODD,
hupcl = HUPCL,
clocal = CLOCAL,
ccts_oflow = CCTS_OFLOW,
crtscts = CRTSCTS,
crts_iflow = CRTS_IFLOW,
mdmbuf = MDMBUF,
};
};
struct local {
enum {
echoke = ECHOKE,
echoe = ECHOE,
echo = ECHO,
echonl = ECHONL,
echoprt = ECHOPRT,
echoctl = ECHOCTL,
isig = ISIG,
icanon = ICANON,
altwerase = ALTWERASE,
iexten = IEXTEN,
extproc = EXTPROC,
tostop = TOSTOP,
flusho = FLUSHO,
nokerninfo = NOKERNINFO,
pendin = PENDIN,
noflsh = NOFLSH,
};
};
tcflag_t input_flags () const { return myCurrent.c_iflag; }
tcflag_t output_flags () const { return myCurrent.c_oflag; }
tcflag_t control_flags () const { return myCurrent.c_cflag; }
tcflag_t local_flags () const { return myCurrent.c_lflag; }
const cc_t *control_chars () const { return myCurrent.c_cc; }
speed_t input_speed () const { return myCurrent.c_ispeed; }
speed_t output_speed () const { return myCurrent.c_ospeed; }
void input_flags (tcflag_t flags) { myCurrent.c_iflag = flags; }
void output_flags (tcflag_t flags) { myCurrent.c_oflag = flags; }
void control_flags (tcflag_t flags) { myCurrent.c_cflag = flags; }
void local_flags (tcflag_t flags) { myCurrent.c_lflag = flags; }
cc_t *control_chars () { return myCurrent.c_cc; }
void input_speed (speed_t speed) { myCurrent.c_ispeed = speed; }
void output_speed (speed_t speed) { myCurrent.c_ospeed = speed; }
void apply () { assert(tcsetattr(myFd, TCSANOW, &myCurrent) == 0); }
void reset () { assert(tcgetattr(myFd, &myCurrent) == 0); }
~Termios () { assert(tcsetattr(myFd, TCSANOW, &myStart) == 0); }
private:
int myFd;
struct termios myStart, myCurrent;
explicit Termios (const Termios &);
Termios &operator= (const Termios &);
};
template <size_t N>
struct ClassifiedBuffer {
public:
char *buffer () { return myBuffer; }
const char *buffer () const { return myBuffer; }
char &operator[] (size_t i) { return myBuffer[i]; }
const char &operator[] (size_t i) const { return myBuffer[i]; }
~ClassifiedBuffer () {
std::memset(myBuffer, 0, N);
*const_cast<volatile char *>(myBuffer) = *const_cast<volatile char *>(myBuffer);
}
private:
char myBuffer[N];
};
std::istream &noecho_getline (char *buf, std::size_t len) {
Termios termios(STDIN_FILENO);
termios.local_flags(termios.local_flags() & ~(Termios::local::echo | Termios::local::icanon));
termios.apply();
return std::cin.getline(buf, len);
}
int main () {
setvbuf(stdin, 0, _IONBF, 0);
# if defined(__GNUC__) && __GNUC__ < 3
std::cin.rdbuf()->setbuf(0, 0);
# else
std::cin.rdbuf()->pubsetbuf(0, 0);
# endif
ClassifiedBuffer<80> pwd;
if (noecho_getline(pwd.buffer(), 80)) {
std::cout.put('[').write(pwd.buffer(), std::strlen(pwd.buffer())).put(']') << '\n';
}
return 0;
}
|