forked from enlightenment/terminology
terminology: cleanup escape sequences parsing. Fix #1628
Charset length for example was not correctly handled and could even lead to segfaults. SVN revision: 80980
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1434247df2
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d18cc90367
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@ -16,12 +16,16 @@
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#define ERR(...) EINA_LOG_DOM_ERR(_termpty_log_dom, __VA_ARGS__)
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#define WRN(...) EINA_LOG_DOM_WARN(_termpty_log_dom, __VA_ARGS__)
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#define INF(...) EINA_LOG_DOM_INFO(_termpty_log_dom, __VA_ARGS__)
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#define DBG(...) EINA_LOG_DOM_DBG(_termpty_log_dom, __VA_ARGS__)
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#define DBG(...) EINA_LOG_DOM_ERR(_termpty_log_dom, __VA_ARGS__)
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#define ST 0x9c // String Terminator
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#define BEL 0x07 // Bell
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#define ESC 033 // Escape
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/* XXX: all handle_ functions return the number of bytes successfully read, 0
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* if not enought bytes could be read
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*/
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static int
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_csi_arg_get(Eina_Unicode **ptr)
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{
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@ -62,10 +66,7 @@ _handle_esc_csi(Termpty *ty, const Eina_Unicode *c, Eina_Unicode *ce)
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b++;
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cc++;
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}
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// if cc == ce then we got to the end of the string with no end marker
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// so return -2 to indicate to go back to the escape beginning when
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// there is more bufer available
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if (cc == ce) return -2;
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if (cc == ce) return 0;
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*b = 0;
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b = buf;
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// DBG(" CSI: '%c' args '%s'", *cc, buf);
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@ -892,7 +893,7 @@ _handle_esc_xterm(Termpty *ty, const Eina_Unicode *c, Eina_Unicode *ce)
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}
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*b = 0;
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if ((*cc == ST) || (*cc == BEL) || (*cc == '\\')) cc++;
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else return -2;
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else return 0;
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switch (buf[0])
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{
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case '0':
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@ -946,6 +947,8 @@ _handle_esc_xterm(Termpty *ty, const Eina_Unicode *c, Eina_Unicode *ce)
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break;
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case '4':
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// XXX: set palette entry. not supported.
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DBG("set palette, not supported");
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if ((cc - c) < 3) return 0;
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b = &(buf[2]);
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break;
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default:
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@ -974,7 +977,7 @@ _handle_esc_terminology(Termpty *ty, const Eina_Unicode *c, Eina_Unicode *ce)
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}
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*b = 0;
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if (*cc == 0x0) cc++;
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else return -2;
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else return 0;
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// commands are stored in the buffer, 0 bytes not allowd (end marker)
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s = eina_unicode_unicode_to_utf8(buf, &slen);
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ty->cur_cmd = s;
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@ -1008,7 +1011,7 @@ _handle_esc_dcs(Termpty *ty __UNUSED__, const Eina_Unicode *c, Eina_Unicode *ce)
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}
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*b = 0;
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if ((*cc == ST) || (*cc == '\\')) cc++;
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else return -2;
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else return 0;
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switch (buf[0])
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{
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case '+':
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@ -1025,73 +1028,89 @@ _handle_esc_dcs(Termpty *ty __UNUSED__, const Eina_Unicode *c, Eina_Unicode *ce)
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static int
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_handle_esc(Termpty *ty, const Eina_Unicode *c, Eina_Unicode *ce)
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{
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if ((ce - c) < 2) return 0;
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DBG("ESC: '%c'", c[1]);
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switch (c[1])
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int len = ce - c;
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if (len < 1) return 0;
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DBG("ESC: '%c'", c[0]);
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switch (c[0])
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{
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case '[':
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return 2 + _handle_esc_csi(ty, c + 2, ce);
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len = _handle_esc_csi(ty, c + 1, ce);
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if (len == 0) return 0;
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return 1 + len;
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case ']':
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return 2 + _handle_esc_xterm(ty, c + 2, ce);
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len = _handle_esc_xterm(ty, c + 1, ce);
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if (len == 0) return 0;
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return 1 + len;
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case '}':
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return 2 + _handle_esc_terminology(ty, c + 2, ce);
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len = _handle_esc_terminology(ty, c + 1, ce);
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if (len == 0) return 0;
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return 1 + len;
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case 'P':
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return 2 + _handle_esc_dcs(ty, c + 2, ce);
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len = _handle_esc_dcs(ty, c + 1, ce);
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if (len == 0) return 0;
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return 1 + len;
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case '=': // set alternate keypad mode
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ty->state.alt_kp = 1;
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return 2;
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return 1;
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case '>': // set numeric keypad mode
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ty->state.alt_kp = 0;
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return 2;
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return 1;
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case 'M': // move to prev line
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ty->state.wrapnext = 0;
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ty->state.cy--;
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_termpty_text_scroll_rev_test(ty);
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return 2;
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return 1;
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case 'D': // move to next line
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ty->state.wrapnext = 0;
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ty->state.cy++;
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_termpty_text_scroll_test(ty);
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return 2;
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return 1;
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case 'E': // add \n\r
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ty->state.wrapnext = 0;
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ty->state.cx = 0;
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ty->state.cy++;
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_termpty_text_scroll_test(ty);
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return 2;
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return 1;
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case 'Z': // same a 'ESC [ Pn c'
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_term_txt_write(ty, "\033[?1;2C");
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return 2;
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return 1;
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case 'c': // reset terminal to initial state
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DBG("reset to init mode and clear");
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_termpty_reset_state(ty);
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_termpty_clear_screen(ty, TERMPTY_CLR_ALL);
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if (ty->cb.cancel_sel.func)
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ty->cb.cancel_sel.func(ty->cb.cancel_sel.data);
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return 2;
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return 1;
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case '(': // charset 0
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ty->state.chset[0] = c[2];
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if (len < 2) return 0;
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ty->state.chset[0] = c[1];
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ty->state.multibyte = 0;
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ty->state.charsetch = c[2];
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return 3;
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ty->state.charsetch = c[1];
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return 2;
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case ')': // charset 1
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ty->state.chset[1] = c[2];
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if (len < 2) return 0;
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ty->state.chset[1] = c[1];
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ty->state.multibyte = 0;
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return 3;
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return 2;
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case '*': // charset 2
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ty->state.chset[2] = c[2];
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if (len < 2) return 0;
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ty->state.chset[2] = c[1];
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ty->state.multibyte = 0;
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return 3;
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return 2;
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case '+': // charset 3
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ty->state.chset[3] = c[2];
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if (len < 2) return 0;
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ty->state.chset[3] = c[1];
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ty->state.multibyte = 0;
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return 3;
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return 2;
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case '$': // charset -2
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ty->state.chset[2] = c[2];
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if (len < 2) return 0;
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ty->state.chset[2] = c[1];
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ty->state.multibyte = 1;
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return 3;
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return 2;
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case '#': // #8 == test mode -> fill screen with "E";
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if (c[2] == '8')
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if (len < 2) return 0;
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if (c[1] == '8')
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{
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int i, size;
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Termcell *cells;
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@ -1110,30 +1129,31 @@ _handle_esc(Termpty *ty, const Eina_Unicode *c, Eina_Unicode *ce)
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for (i = 0; i < size; i++) cells[i].codepoint = 'E';
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}
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}
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return 3;
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return 2;
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case '@': // just consume this plus next char
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return 3;
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if (len < 2) return 0;
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return 2;
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case '7': // save cursor pos
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_termpty_cursor_copy(&(ty->state), &(ty->save));
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return 2;
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return 1;
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case '8': // restore cursor pos
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_termpty_cursor_copy(&(ty->save), &(ty->state));
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return 2;
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return 1;
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/*
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case 'G': // query gfx mode
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return 3;
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return 2;
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case 'H': // set tab at current column
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return 2;
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return 1;
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case 'n': // single shift 2
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return 2;
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return 1;
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case 'o': // single shift 3
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return 2;
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return 1;
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*/
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default:
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ERR("eek - esc unhandled '%c' (0x%02x)", c[1], c[1]);
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break;
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}
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ERR("eek - esc unhandled '%c' (0x%02x)", c[0], c[0]);
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return 1;
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}
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return 0;
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}
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int
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@ -1257,7 +1277,9 @@ _termpty_handle_seq(Termpty *ty, Eina_Unicode *c, Eina_Unicode *ce)
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*/
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case 0x1b: // ESC (escape)
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ty->state.had_cr = 0;
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return _handle_esc(ty, c, ce);
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len = _handle_esc(ty, c + 1, ce);
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if (len == 0) return 0;
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return 1 + len;
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/*
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case 0x1c: // FS (file separator)
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return 1;
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@ -1282,13 +1304,11 @@ _termpty_handle_seq(Termpty *ty, Eina_Unicode *c, Eina_Unicode *ce)
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}
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else if (c[0] == 0x9b) // ANSI ESC!!!
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{
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int v;
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printf("ANSI CSI!!!!!\n");
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ty->state.had_cr = 0;
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v = _handle_esc_csi(ty, c + 1, ce);
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if (v == -2) return 0;
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return v + 1;
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len = _handle_esc_csi(ty, c + 1, ce);
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if (len == 0) return 0;
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return 1 + len;
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}
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cc = (int *)c;
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