int bstr_decode_utf8(struct bstr s, struct bstr *out_next)
{
if (s.len == 0)
return -1;
unsigned int codepoint = s.start[0];
s.start++; s.len--;
if (codepoint >= 128) {
int bytes = bstr_parse_utf8_code_length(codepoint);
if (bytes < 0 || s.len < bytes - 1)
return -1;
codepoint &= 127 >> bytes;
for (int n = 1; n < bytes; n++) {
int tmp = (unsigned char)s.start[0];
if ((tmp & 0xC0) != 0x80)
return -1;
codepoint = (codepoint << 6) | (tmp & ~0xC0);
s.start++; s.len--;
}
if (codepoint > 0x10FFFF || (codepoint >= 0xD800 && codepoint <= 0xDFFF))
return -1;
// Overlong sequences - check taken from libavcodec.
// (The only reason we even bother with this is to make libavcodec's
// retarded subtitle utf-8 check happy.)
unsigned int min = bytes == 2 ? 0x80 : 1 << (5 * bytes - 4);
if (codepoint < min)
return -1;
}
int bstr_decode_utf8(struct bstr s, struct bstr *out_next)
{
if (s.len == 0)
return -1;
unsigned int codepoint = s.start[0];
s.start++; s.len--;
if (codepoint >= 128) {
int bytes = bstr_parse_utf8_code_length(codepoint);
if (bytes < 0 || s.len < bytes - 1)
return -1;
codepoint &= 127 >> bytes;
for (int n = 1; n < bytes; n++) {
int tmp = s.start[0];
if ((tmp & 0xC0) != 0x80)
return -1;
codepoint = (codepoint << 6) | (tmp & ~0xC0);
s.start++; s.len--;
}
}
bool getch2(struct input_ctx *input_ctx)
{
int retval = read(0, &getch2_buf[getch2_pos], BUF_LEN - getch2_len - getch2_pos);
/* Return false on EOF to stop running select() on the FD, as it'd
* trigger all the time. Note that it's possible to get temporary
* EOF on terminal if the user presses ctrl-d, but that shouldn't
* happen if the terminal state change done in getch2_enable()
* works.
*/
if (retval == 0)
return false;
if (retval == -1)
return errno != EBADF && errno != EINVAL;
getch2_len += retval;
while (getch2_pos < getch2_len) {
unsigned char c = getch2_buf[getch2_pos++];
switch (state) {
case STATE_INITIAL: {
int match_count = keys_count_matches(&getch2_buf[0], getch2_len);
if (match_count == 1) {
keycode_st *st = keys_search(&getch2_buf[0], getch2_len);
if (st) {
mp_input_put_key(input_ctx, st->code);
walk_buf(st->len);
} /* else this is still a partial (but unique) match */
continue;
} else if (match_count > 1) {
continue; /* need more bytes to disambiguate */
} else {
/* backtrack, send as UTF-8 */
getch2_pos = 1;
c = getch2_buf[0];
}
utf8_len = bstr_parse_utf8_code_length(c);
if (utf8_len > 1) {
state = STATE_UTF8;
} else if (utf8_len == 1) {
switch (c) {
case 0x1b: /* ESC that's not part of escape sequence */
/* only if ESC was typed twice, otherwise ignore it */
if (getch2_len > 1 && getch2_buf[1] == 0x1b) {
walk_buf(1); /* eat the second ESC */
mp_input_put_key(input_ctx, MP_KEY_ESC);
}
break;
default:
mp_input_put_key(input_ctx, c);
}
walk_buf(1);
} else
walk_buf(getch2_pos);
break;
}
case STATE_UTF8: {
if (getch2_pos < utf8_len) /* need more bytes */
continue;
struct bstr s = {getch2_buf, utf8_len};
int unicode = bstr_decode_utf8(s, NULL);
if (unicode > 0) {
mp_input_put_key(input_ctx, unicode);
}
walk_buf(utf8_len);
state = STATE_INITIAL;
continue;
}
}
}
return true;
}
bool getch2(struct mp_fifo *fifo)
{
int retval = read(0, &getch2_buf[getch2_len], BUF_LEN-getch2_len);
/* Return false on EOF to stop running select() on the FD, as it'd
* trigger all the time. Note that it's possible to get temporary
* EOF on terminal if the user presses ctrl-d, but that shouldn't
* happen if the terminal state change done in getch2_enable()
* works.
*/
if (retval < 1)
return retval;
getch2_len += retval;
while (getch2_len > 0 && (getch2_len > 1 || getch2_buf[0] != 27)) {
int i, len, code;
/* First find in the TERMCAP database: */
for (i = 0; i < getch2_key_db; i++) {
if ((len = getch2_keys[i].len) <= getch2_len)
if(memcmp(getch2_keys[i].chars, getch2_buf, len) == 0) {
code = getch2_keys[i].code;
goto found;
}
}
/* We always match some keypress here, with length 1 if nothing else.
* Since some of the cases explicitly test remaining buffer length
* having a keycode only partially read in the buffer could incorrectly
* use the first byte as an independent character.
* However the buffer is big enough that this shouldn't happen too
* easily, and it's been this way for years without many complaints.
* I see no simple fix as there's no easy test which would tell
* whether a string must be part of a longer keycode. */
len = 1;
code = getch2_buf[0];
/* Check the well-known codes... */
if (code != 27) {
if (code == 'A'-64) code = MP_KEY_HOME;
else if (code == 'E'-64) code = MP_KEY_END;
else if (code == 'D'-64) code = MP_KEY_DEL;
else if (code == 'H'-64) code = MP_KEY_BS;
else if (code == 'U'-64) code = MP_KEY_PGUP;
else if (code == 'V'-64) code = MP_KEY_PGDWN;
else if (code == 8 || code==127) code = MP_KEY_BS;
else if (code == 10 || code==13) {
if (getch2_len > 1) {
int c = getch2_buf[1];
if ((c == 10 || c == 13) && (c != code))
len = 2;
}
code = MP_KEY_ENTER;
} else {
int utf8len = bstr_parse_utf8_code_length(code);
if (utf8len > 0 && utf8len <= getch2_len) {
struct bstr s = { getch2_buf, utf8len };
int unicode = bstr_decode_utf8(s, NULL);
if (unicode > 0) {
len = utf8len;
code = unicode;
}
}
}
}
else if (getch2_len > 1) {
int c = getch2_buf[1];
if (c == 27) {
code = MP_KEY_ESC;
len = 2;
goto found;
}
if (c >= '0' && c <= '9') {
code = c-'0'+MP_KEY_F;
len = 2;
goto found;
}
if (getch2_len >= 4 && c == '[' && getch2_buf[2] == '[') {
int c = getch2_buf[3];
if (c >= 'A' && c < 'A'+12) {
code = MP_KEY_F+1 + c-'A';
len = 4;
goto found;
}
}
if ((c == '[' || c == 'O') && getch2_len >= 3) {
int c = getch2_buf[2];
const int ctable[] = {
MP_KEY_UP, MP_KEY_DOWN, MP_KEY_RIGHT, MP_KEY_LEFT, 0,
MP_KEY_END, MP_KEY_PGDWN, MP_KEY_HOME, MP_KEY_PGUP, 0, 0, MP_KEY_INS, 0, 0, 0,
MP_KEY_F+1, MP_KEY_F+2, MP_KEY_F+3, MP_KEY_F+4};
if (c >= 'A' && c <= 'S')
if (ctable[c - 'A']) {
code = ctable[c - 'A'];
len = 3;
goto found;
}
}
if (getch2_len >= 4 && c == '[' && getch2_buf[3] == '~') {
int c = getch2_buf[2];
const int ctable[8] = {MP_KEY_HOME, MP_KEY_INS, MP_KEY_DEL, MP_KEY_END, MP_KEY_PGUP, MP_KEY_PGDWN, MP_KEY_HOME, MP_KEY_END};
if (c >= '1' && c <= '8') {
code = ctable[c - '1'];
len = 4;
goto found;
}
}
if (getch2_len >= 5 && c == '[' && getch2_buf[4] == '~') {
int i = getch2_buf[2] - '0';
int j = getch2_buf[3] - '0';
if (i >= 0 && i <= 9 && j >= 0 && j <= 9) {
const short ftable[20] = {
11,12,13,14,15, 17,18,19,20,21,
23,24,25,26,28, 29,31,32,33,34 };
int a = i*10 + j;
for (i = 0; i < 20; i++)
if (ftable[i] == a) {
code = MP_KEY_F+1 + i;
len = 5;
goto found;
}
}
}
}
found:
getch2_len -= len;
for (i = 0; i < getch2_len; i++)
getch2_buf[i] = getch2_buf[len+i];
mplayer_put_key(fifo, code);
}
return true;
}
