\
\ This code is part of pForth.
\
-\ The pForth software code is dedicated to the public domain,
-\ and any third party may reproduce, distribute and modify
-\ the pForth software code or any derivative works thereof
-\ without any compensation or license. The pForth software
-\ code is provided on an "as is" basis without any warranty
-\ of any kind, including, without limitation, the implied
-\ warranties of merchantability and fitness for a particular
-\ purpose and their equivalents under the laws of any jurisdiction.
+\ Permission to use, copy, modify, and/or distribute this
+\ software for any purpose with or without fee is hereby granted.
+\
+\ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL
+\ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED
+\ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL
+\ THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR
+\ CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING
+\ FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF
+\ CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+\ OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
private{
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
THEN
;
+\ A limit used to perform a sanity check on the size argument for
+\ RESIZE-FILE.
+2variable RESIZE-FILE-LIMIT
+10000000 0 resize-file-limit 2! \ 10MB is somewhat arbitrarily chosen
+
+: RESIZE-FILE ( ud fileid -- ior )
+ -rot 2dup resize-file-limit 2@ d> ( fileid ud big? )
+ IF
+ ." Argument (" 0 d.r ." ) is larger then RESIZE-FILE-LIMIT." cr
+ ." (You can increase RESIZE-FILE-LIMIT with 2!)" cr
+ abort
+ ELSE
+ rot (resize-file)
+ THEN
+;
+
+: ( ( "comment<rparen>" -- )
+ source-id
+ CASE
+ -1 OF postpone ( ENDOF
+ 0 OF postpone ( ENDOF
+ \ for input from files
+ multi-line-comment
+ ENDCASE
+; immediate
+
+\ We basically try to open the file in read-only mode. That seems to
+\ be the best that we can do with ANSI C. If we ever want to do
+\ something more sophisticated, like calling access(2), we must create
+\ a proper primitive. (OTOH, portable programs can't assume much
+\ about FILE-STATUS and non-portable programs could create a custom
+\ function for access(2).)
+: FILE-STATUS ( c-addr u -- 0 ior )
+ r/o bin open-file ( fileid ior1 )
+ ?dup
+ IF nip 0 swap ( 0 ior1 )
+ ELSE close-file 0 swap ( 0 ior2 )
+ THEN
+;
+
privatize