editor: implement F

blk/064

@@ -1,6 +1,8 @@
 Disk
 
 BLK>  -- a      Address of the current block variable.
+BLK(  -- a      Beginning addr of blk buf.
+BLK)  -- a      Ending addr of blk buf.
 COPY  s d --    Copy contents of s block to d block.
 FLUSH --        Write current block to disk if dirty.
 LIST  n --      Prints the contents of the block n on screen
@@ -12,7 +14,3 @@ WIPE  --        Empties current block
 
 
 
-
-
-
-

blk/101

@@ -1,8 +1,7 @@
 T ( n -- ): select line n for editing.
 P xxx: put typed line on selected line.
 U xxx: insert typed line on selected line.
-
-
+F xxx: find typed string in block.
 
 
 

blk/102

@@ -1,5 +1,5 @@
 152 LOAD ( extras )
-103 106 LOADR
+103 107 LOADR
 
 : BROWSE
     100 _LIST

blk/104

@@ -1,6 +1,7 @@
 ( Cursor position in buffer. EDPOS/64 is line number )
 VARIABLE EDPOS
-CREATE EDBUF 64 ALLOT
+CREATE IBUF 64 ALLOT
+CREATE FBUF 64 ALLOT
 : _cpos BLK( + ;
 : _lpos 64 * _cpos ;
 : _pln ( lineno -- )
@@ -9,8 +10,4 @@ CREATE EDBUF 64 ALLOT
         I C@ DUP 0x20 < IF DROP 0x20 THEN
         EMIT
     LOOP ( lno ) 1+ . ;
-: _zbuf EDBUF 64 0 FILL ;
-: _type ( -- )
-    C< DUP 0xd = IF DROP EXIT THEN _zbuf EDBUF BEGIN ( c a )
-        C!+ C< SWAP OVER 0x0d = UNTIL ( c a )
-    2DROP ;
+: _zbuf 64 0 FILL ; ( buf -- )

blk/105

@@ -1,6 +1,11 @@
+: _type ( buf -- )
+    C< DUP 0xd = IF DROP EXIT THEN OVER DUP _zbuf ( c a )
+    BEGIN ( c a )
+        C!+ C< SWAP
+    OVER 0x0d = UNTIL ( c a ) C! ;
 ( user-facing lines are 1-based )
 : T 1- DUP 64 * EDPOS ! _pln ;
-: P _type EDBUF EDPOS @ _cpos 64 MOVE BLK!! ;
+: P IBUF _type IBUF EDPOS @ _cpos 64 MOVE BLK!! ;
 : _mvln+ ( ln -- move ln 1 line further )
     DUP 14 > IF DROP EXIT THEN
     _lpos DUP 64 + 64 MOVE

blk/106

@@ -1,7 +1,5 @@
 : U
     15 EDPOS @ 64 / - 0 DO
         14 I - _mvln+
-    LOOP
-    P
+    LOOP P
 ;
-

blk/107

@@ -0,0 +1,12 @@
+: F
+    FBUF _type FBUF EDPOS @ _cpos ( a1 a2 )
+    BEGIN
+        C@+ ROT ( a2+1 c2 a1 ) C@+ ROT ( a2+1 a1+1 c1 c2 )
+        = NOT IF DROP FBUF THEN
+        SWAP OVER C@ 0xd = ( a1 a2 f1 )
+        OVER BLK) = OR ( a1 a2 f1|f2 )
+    UNTIL
+    DUP BLK) < IF BLK( - FBUF + -^ EDPOS ! THEN
+    EDPOS @ 64 / _pln
+;
+

blk/464

@@ -8,5 +8,6 @@
 ( Whether buffer is dirty )
 : BLKDTY 6 BLKMEM+ ;
 : BLK( 8 BLKMEM+ ;
+: BLK) BLK( 1024 + ;