Don't crash if ivar_getTypeEncoding returns NULL.

[cycript.git] / Display.cpp

diff --git a/Display.cpp b/Display.cpp
index 5e45c458a16f91c574ce77954024039304ab8323..bd646bbd2f856294f3c1b4e7d626440750e5471c 100644 (file)
--- a/Display.cpp
+++ b/Display.cpp
@@ -1,20 +1,20 @@
 /* Cycript - Optimizing JavaScript Compiler/Runtime
- * Copyright (C) 2009-2012  Jay Freeman (saurik)
+ * Copyright (C) 2009-2013  Jay Freeman (saurik)
 */
 
-/* GNU Lesser General Public License, Version 3 {{{ */
+/* GNU General Public License, Version 3 {{{ */
 /*
- * Cycript is free software: you can redistribute it and/or modify it under
- * the terms of the GNU Lesser General Public License as published by the
- * Free Software Foundation, either version 3 of the License, or (at your
- * option) any later version.
+ * Cycript is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published
+ * by the Free Software Foundation, either version 3 of the License,
+ * or (at your option) any later version.
  *
- * Cycript is distributed in the hope that it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
- * License for more details.
+ * Cycript is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
  *
- * You should have received a copy of the GNU Lesser General Public License
+ * You should have received a copy of the GNU General Public License
  * along with Cycript.  If not, see <http://www.gnu.org/licenses/>.
 **/
 /* }}} */
@@ -28,6 +28,8 @@
 #include <readline/readline.h>
 #endif
 
+#if RL_READLINE_VERSION >= 0x0600
+
 #include <sys/ioctl.h>
 
 #include "Highlight.hpp"
@@ -36,6 +38,11 @@
 
 typedef std::complex<int> CYCursor;
 
+extern "C" int rl_display_fixed;
+extern "C" int _rl_vis_botlin;
+extern "C" int _rl_last_c_pos;
+extern "C" int _rl_last_v_pos;
+
 CYCursor current_;
 int width_;
 size_t point_;
@@ -72,9 +79,6 @@ CYCursor CYDisplayOutput(int (*put)(int), int width, const char *data, ssize_t o
 
             case CYIgnoreStart:
                 CYDisplayOutput_(put, data);
-                ++offset;
-            break;
-
             case CYIgnoreEnd:
                 ++offset;
             break;
@@ -90,28 +94,33 @@ CYCursor CYDisplayOutput(int (*put)(int), int width, const char *data, ssize_t o
 
         }
     }
+}
 
-    return point;
+void CYDisplayMove_(char *negative, char *positive, int offset) {
+    if (offset < 0)
+        putp(tparm(negative, -offset));
+    else if (offset > 0)
+        putp(tparm(positive, offset));
 }
 
 void CYDisplayMove(CYCursor target) {
-    int offset(target.real() - current_.real());
+    CYCursor offset(target - current_);
 
-    if (offset < 0)
-        putp(tparm(parm_up_cursor, -offset));
-    else if (offset > 0)
-        putp(tparm(parm_down_cursor, offset));
+    CYDisplayMove_(parm_up_cursor, parm_down_cursor, offset.real());
 
-    putp(tparm(column_address, target.imag()));
-    current_ = target;
-}
+    if (char *parm = tparm(column_address, target.imag()))
+        putp(parm);
+    else
+        CYDisplayMove_(parm_left_cursor, parm_right_cursor, offset.imag());
 
-void CYDisplayStart(int meta) {
-    rl_prep_terminal(meta);
-    current_ = CYCursor();
+    current_ = target;
 }
 
 void CYDisplayUpdate() {
+    rl_display_fixed = 1;
+    rl_redisplay();
+    current_ = CYCursor(_rl_last_v_pos, _rl_last_c_pos);
+
 #if RL_READLINE_VERSION >= 0x0600
     const char *prompt(rl_display_prompt);
 #else
@@ -132,20 +141,22 @@ void CYDisplayUpdate() {
 
     CYDisplayMove(CYCursor());
     CYDisplayOutput(putchar, width, prompt);
-
     CYCursor target(CYDisplayOutput(putchar, width, stream.str().c_str(), rl_point));
-    if (target.imag() == 0)
-        putp(cursor_down);
 
+    _rl_vis_botlin = current_.real();
+
+    if (current_.imag() == 0)
+        CYDisplayOutput(putchar, width, " ");
     putp(clr_eos);
-    CYDisplayMove(target);
 
+    CYDisplayMove(target);
     fflush(stdout);
 
+    _rl_last_v_pos = current_.real();
+    _rl_last_c_pos = current_.imag();
+
     width_ = width;
     point_ = rl_point;
 }
 
-void CYDisplayFinish() {
-    rl_deprep_terminal();
-}
+#endif