Add support for multi-line ( comments

[pforth] / fth / file.fth

diff --git a/fth/file.fth b/fth/file.fth
index bc81f3a..6b0db20 100644 (file)
--- a/fth/file.fth
+++ b/fth/file.fth
@@ -50,6 +50,27 @@ private{
 create (LINE-TERMINATOR) \n c,
 : LINE-TERMINATOR ( -- c-addr u ) (line-terminator) 1 ;
 
 create (LINE-TERMINATOR) \n c,
 : LINE-TERMINATOR ( -- c-addr u ) (line-terminator) 1 ;
 

+\ Standard throw code
+\ See: http://lars.nocrew.org/forth2012/exception.html#table:throw
+-72 constant THROW_RENAME_FILE
+
+\ Copy the string C-ADDR/U1 to C-ADDR2 and append a NUL.
+: PLACE-CSTR  ( c-addr1 u1 c-addr2 -- )
+    2dup 2>r          ( c-addr1 u1 c-addr2 )  ( r: u1 c-addr2 )
+    swap cmove        ( ) ( r: u1 c-addr2 )
+    0 2r> + c!        ( )
+;
+
+: MULTI-LINE-COMMENT ( "comment<rparen>" -- )
+    BEGIN
+        >in @ ')' parse         ( >in c-addr len )
+        nip + >in @ =           ( delimiter-not-found? )
+    WHILE                       ( )
+        refill 0= IF EXIT THEN  ( )
+    REPEAT
+
+;
+

 }private
 
 \ This treats \n, \r\n, and \r as line terminator.  Reading is done
 }private
 
 \ This treats \n, \r\n, and \r as line terminator.  Reading is done


@@ -85,4 +106,25 @@ create (LINE-TERMINATOR) \n c,
     THEN
 ;
 
     THEN
 ;
 

+: RENAME-FILE ( c-addr1 u1 c-addr2 u2 -- ior )
+    { a1 u1 a2 u2 | new }
+    \ Convert the file-names to C-strings by copying them after HERE.
+    a1 u1 here place-cstr
+    here u1 1+ chars + to new
+    a2 u2 new place-cstr
+    here new (rename-file) 0=
+    IF 0
+    ELSE throw_rename_file
+    THEN
+;
+
+: (  ( "comment<rparen>"  -- )
+    source-id
+    CASE
+        -1 OF postpone ( ENDOF
+        0  OF postpone ( ENDOF
+        multi-line-comment
+    ENDCASE
+; immediate
+

 privatize
 privatize