add vern's ok for copyright/license changes and john's answer on line offsets

1 files changed, 168 insertions, 52 deletions

diff --git a/to.do/flex.rmail b/to.do/flex.rmail
index 5080d5f..ec2eb9e 100644
--- a/to.do/flex.rmail
+++ b/to.do/flex.rmail
@@ -2364,58 +2364,6 @@ you - search for "reentrant".
 		Vern
 
 
-1, filed, answered,,
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-	Tue, 17 Apr 2001 09:15:50 -0700 (PDT)
-Message-Id: <200104171615.f3HGFoP19785@daffy.ee.lbl.gov>
-To: "W. L. Estes" <wlestes@uncg.edu>
-Subject: Re: Flex comments
-In-reply-to: Your message of Tue, 17 Apr 2001 08:57:41 PDT.
-Date: Tue, 17 Apr 2001 09:15:50 PDT
-From: Vern Paxson <vern@ee.lbl.gov>
-
-*** EOOH ***
-To: "W. L. Estes" <wlestes@uncg.edu>
-Subject: Re: Flex comments
-In-reply-to: Your message of Tue, 17 Apr 2001 08:57:41 PDT.
-Date: Tue, 17 Apr 2001 09:15:50 PDT
-From: Vern Paxson <vern@ee.lbl.gov>
-
-> If there is more detail in the original message, could you forward it
-> to me?
-
-That was the whole message.  The basic problem that people run into
-is they want reentrant scanners, so no statics or global variables.
-The general strategy for this is to have a new yylex() interface in
-which the caller passes in a struct that has all of the otherwise-global
-variables.  This is a bit tricky to do cleanly because you can't switch
-to that as *the* interface, of course, because it would break the
-existing API; which means you have to be able to generate two forms of
-the skeleton file, one for the existing API with the statics/globals,
-and one without them and the struct definition instead.
-
-There's probably some more discussion on this in the mail tarball I sent
-you - search for "reentrant".
-
-		Vern
-
-
 1,,
 X-Coding-System: nil
 Mail-from: From help-flex-admin@gnu.org  Wed Apr 25 00:20:40 2001
@@ -4199,4 +4147,172 @@ Bill Fenlason
 
 
 
+
+1, answered,,
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+Mail-from: From vern@daffy.ee.lbl.gov  Sun Jun 17 03:08:59 2001
+Return-Path: <vern@daffy.ee.lbl.gov>
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+Message-Id: <200106170706.f5H76So24900@daffy.ee.lbl.gov>
+To: Theo de Raadt <deraadt@cvs.openbsd.org>
+Subject: Re: lex license
+Cc: wlestes@uncg.edu
+In-reply-to: Your message of Sat, 02 Jun 2001 13:15:37 PDT.
+Date: Sun, 17 Jun 2001 00:06:28 PDT
+From: Vern Paxson <vern@ee.lbl.gov>
+
+*** EOOH ***
+To: Theo de Raadt <deraadt@cvs.openbsd.org>
+Subject: Re: lex license
+Cc: wlestes@uncg.edu
+In-reply-to: Your message of Sat, 02 Jun 2001 13:15:37 PDT.
+Date: Sun, 17 Jun 2001 00:06:28 PDT
+From: Vern Paxson <vern@ee.lbl.gov>
+
+> Specifically, this license does not grant modification
+> rights -- which must be explicitly granted under copyright law.
+
+Yes, this came up a while ago, and I put together a flex release with
+a modified copyright that begins:
+
+        Redistribution and use in source and binary forms, with or
+        without modification, are permitted provided that:
+
+However, that version didn't get fully integrated into the sources I sent
+to Will.  It's in the COPYING file but not in the individual source files,
+just because I hadn't gotten around to it.
+
+Will, feel free to update the copyrights in each of the files with the
+one in COPYING.
+
+		Vern
+
+
+1,,
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+From: "John W. Millaway" <johnmillaway@yahoo.com>
+Subject: Re: yylineno
+To: Bill Fenlason <BillFen@Ulster.Net>
+Cc: help-flex@gnu.org
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+Date: Sun, 17 Jun 2001 10:03:20 -0700 (PDT)
+
+*** EOOH ***
+From: "John W. Millaway" <johnmillaway@yahoo.com>
+Subject: Re: yylineno
+To: Bill Fenlason <BillFen@Ulster.Net>
+Cc: help-flex@gnu.org
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+	the GNU lexical analyser generator <help-flex.gnu.org>
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+Date: Sun, 17 Jun 2001 10:03:20 -0700 (PDT)
+
+> How do you (or would you) keep track of the token offset within the line?
+> 
+
+By this, do you mean the "column"?  If your tokens do not span lines,
+then you can use yyleng. If the tokens do span lines,
+then you have to rescan the token. Yuk!
+
+%%
+  /* This is untested code. But in the right spirit ! */
+  static int yycol=0, next_col=0;
+  char* _p;
+
+  /* Update yycol for tokens that do not contain '\n' */
+  #define COL()  yycol=next_col; next_col += yyleng
+
+  /* Update yycol for tokens that may possibly contain '\n' */
+  #define COLN() do{ \
+                   yycol=next_col; \
+                   for(_p=yytext; *_p; _p++,next_col++)  \
+                      if( *_p == '\n' )  \
+                         next_col = -1; \
+                 }while(0)
+
+  #define NEWL() yycol = next_col= 0
+
+foo|bar  { COL();  printf("%d: %s\n" ,  yycol, yytext); }
+\n       { NEWL(); printf("%d: NEWL\n", yycol); }
+foo\nbar { COLN(); printf("%d: %s\n" ,  yycol, yytext); }
+
+%%
+
+-John
+
+
+
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