fix some bugs

femto.tal

@@ -314,7 +314,7 @@
     &done ;redraw-cursor JSR2 ;return JMP2
 
 @center-view
-    ;term/rows LDZ2 INC2 #0002 DIV2 STH2k
+    .term/rows LDZ2 INC2 #0002 DIV2 STH2k
     .cursor/row LDZ2 LTH2 ,&standard JCN
         POP2r
         #0000 .buffer/line-offset STZ2
@@ -429,7 +429,7 @@
     GTH2 JMP2r
 
 @backspace ( -> )
-    .buffer/offset LDZ2 ;data EQU2 ,&skip JCN
+    ;cur-pos JSR2 ;data EQU2 ,&skip JCN
     ;go-back JSR2
     ;delete JMP2
     &skip
@@ -707,7 +707,24 @@
         ;redraw-all JSR2
         ;return JMP2
 
-@move-to-prev-match BRK
+@move-to-prev-match
+    ;data
+    ( FIXME: we should consider starting at the _end_ of the current match )
+    ;cur-pos JSR2 #0001 SUB2
+    &loop
+        GTH2k ,&fail JCN
+    &next
+        DUP2 ;matches-at JSR2
+        ORA ,&found JCN
+        #0001 SUB2 ,&loop JMP
+    &found
+        NIP2 ;jump-to-pos JSR2
+        ,&done JMP
+    &fail
+        POP2 POP2
+    &done
+        ;redraw-all JSR2
+        ;return JMP2
 
 @on-key-searching
     .state/key LDZ #07 EQU ( C-g ) ;cancel-search JCN2
@@ -726,8 +743,6 @@
     BRK
 
 ( TODO: C-h for help )
-( TODO: C-s for search )
-( TODO: tab input? )
 @on-key
     .Console/read DEI .state/key STZ
     ;clear-message-line JSR2
@@ -1073,6 +1088,7 @@
     &tabs #0004 ADD2 ,&loop JMP
     &done POP2 STH2r JMP2r )
 
+( TODO: leaving stuff on stack it seems )
 @jump-to-pos ( s* -> )
     ;pos-to-row-col JSR2 ( row col )
     SWP2 ;jump-to-line JSR2
@@ -1094,6 +1110,7 @@
         ,&row LDR2 INC2 ,&row STR2
         INC2 ,&loop JMP
     &done
+        POP2 POP2
         ,&row LDR2 ,&col LDR2 JMP2r
     [ &row $2 &col $2 ]