#| -*-Scheme-*-

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    2017, 2018, 2019, 2020, 2021, 2022 Massachusetts Institute of
    Technology

This file is part of MIT/GNU Scheme.

MIT/GNU Scheme is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or (at
your option) any later version.

MIT/GNU Scheme is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
General Public License for more details.

You should have received a copy of the GNU General Public License
along with MIT/GNU Scheme; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301,
USA.

|#

;;;; Program to generate db4 code tables

(declare (usual-integrations))

(define (write-forward-map entries port)
  (write-map entries port
	     (lambda (name port)
	       (write-string "	RC_TO_NAME_CASE (" port)
	       (write-string name port)
	       (write-string ", \"" port)
	       (write-string (string-downcase name) port)
	       (write-string "\");" port)
	       (newline port))))

(define (write-backward-map entries port)
  (write-map entries port
	     (lambda (name port)
	       (write-string "    NAME_TO_RC_CASE (\"" port)
	       (write-string (string-downcase name) port)
	       (write-string "\", " port)
	       (write-string name port)
	       (write-string ");" port)
	       (newline port))))

(define (write-map entries port write-entry)
  (for-each (lambda (entry)
	      (let ((name (car entry))
		    (changes (cdr entry)))
		(if (pair? changes)
		    (begin
		      (write-conditional-start changes port)
		      (write-entry name port)
		      (write-conditional-end port))
		    (write-entry name port))))
	    entries))

(define (write-conditional-start changes port)
  (write-string "#if " port)
  (write-predicate changes port)
  (newline port))

(define (write-conditional-end port)
  (write-string "#endif" port)
  (newline port))

(define (write-predicate changes port)
  (write-comparison (caar changes) (cadar changes) port)
  (for-each (lambda (change)
	      (write-string " && " port)
	      (write-comparison (car change) (cadr change) port))
	    (cdr changes)))

(define (write-comparison action version port)
  (write-string "(UNIFIED_VERSION " port)
  (write-string (case action
		  ((added) ">=")
		  ((removed) "<")
		  (else (error "Unknown action:" action)))
		port)
  (write-string " 0x" port)
  (write-string version port)
  (write-string ")" port))

(define (generate-changes)
  (let ((table (make-string-hash-table))
	(groups
	 (sort (map (lambda (group)
		      (cons (car group)
			    (sort (cdr group) string<?)))
		    rc-names)
	   (lambda (g1 g2)
	     (string<? (car g1) (car g2))))))
    (for-each (lambda (name)
		(hash-table-set! table name '()))
	      (cdar groups))
    (let ((make-notes
	   (lambda (names action version)
	     (for-each
	      (lambda (name)
		(hash-table-update!/default table
					    name
					    (lambda (tail)
					      (cons (list action version)
						    tail))
					    '()))
	      names))))
      (let loop ((groups rc-names))
	(if (pair? (cdr groups))
	    (let ((g1 (car groups))
		  (g2 (cadr groups)))
	      (receive (g1-only g2-only)
		  (generate-one-diff (cdr g1) (cdr g2))
		(make-notes g1-only 'removed (car g2))
		(make-notes g2-only 'added (car g2))
		(loop (cdr groups)))))))
    (sort (map (lambda (entry)
		 (set-cdr! entry (reverse! (cdr entry)))
		 entry)
	       (hash-table->alist table))
      (lambda (e1 e2)
	(string<? (car e1) (car e2))))))

(define (generate-one-diff s1 s2)
  (let loop
      ((s1 (sort s1 string<?))
       (s2 (sort s2 string<?))
       (s1-only '())
       (s2-only '()))
    (cond ((not (pair? s1))
	   (values (reverse! s1-only)
		   (append! (reverse! s2-only) s2)))
	  ((not (pair? s2))
	   (values (append! (reverse! s1-only) s1)
		   (reverse! s2-only)))
	  ((string<? (car s1) (car s2))
	   (loop (cdr s1)
		 s2
		 (cons (car s1) s1-only)
		 s2-only))
	  ((string<? (car s2) (car s1))
	   (loop s1
		 (cdr s2)
		 s1-only
		 (cons (car s2) s2-only)))
	  (else
	   (loop (cdr s1)
		 (cdr s2)
		 s1-only
		 s2-only)))))

(define rc-names
  '(("040200"
     "DB_DONOTINDEX"
     "DB_FILEOPEN"
     "DB_KEYEMPTY"
     "DB_KEYEXIST"
     "DB_LOCK_DEADLOCK"
     "DB_LOCK_NOTGRANTED"
     "DB_NOSERVER"
     "DB_NOSERVER_HOME"
     "DB_NOSERVER_ID"
     "DB_NOTFOUND"
     "DB_OLD_VERSION"
     "DB_PAGE_NOTFOUND"
     "DB_REP_DUPMASTER"
     "DB_REP_HANDLE_DEAD"
     "DB_REP_HOLDELECTION"
     "DB_REP_ISPERM"
     "DB_REP_NEWMASTER"
     "DB_REP_NEWSITE"
     "DB_REP_NOTPERM"
     "DB_REP_OUTDATED"
     "DB_REP_UNAVAIL"
     "DB_RUNRECOVERY"
     "DB_SECONDARY_BAD"
     "DB_VERIFY_BAD"
     "DB_ALREADY_ABORTED"
     "DB_DELETED"
     "DB_LOCK_NOTEXIST"
     "DB_NEEDSPLIT"
     "DB_SURPRISE_KID"
     "DB_SWAPBYTES"
     "DB_TIMEOUT"
     "DB_TXN_CKP"
     "DB_VERIFY_FATAL")

    ("040300"
     "DB_BUFFER_SMALL"
     "DB_DONOTINDEX"
     "DB_KEYEMPTY"
     "DB_KEYEXIST"
     "DB_LOCK_DEADLOCK"
     "DB_LOCK_NOTGRANTED"
     "DB_LOG_BUFFER_FULL"
     "DB_NOSERVER"
     "DB_NOSERVER_HOME"
     "DB_NOSERVER_ID"
     "DB_NOTFOUND"
     "DB_OLD_VERSION"
     "DB_PAGE_NOTFOUND"
     "DB_REP_DUPMASTER"
     "DB_REP_HANDLE_DEAD"
     "DB_REP_HOLDELECTION"
     "DB_REP_ISPERM"
     "DB_REP_NEWMASTER"
     "DB_REP_NEWSITE"
     "DB_REP_NOTPERM"
     "DB_REP_STARTUPDONE"
     "DB_REP_UNAVAIL"
     "DB_RUNRECOVERY"
     "DB_SECONDARY_BAD"
     "DB_VERIFY_BAD"
     "DB_VERSION_MISMATCH"
     "DB_ALREADY_ABORTED"
     "DB_DELETED"
     "DB_LOCK_NOTEXIST"
     "DB_NEEDSPLIT"
     "DB_REP_EGENCHG"
     "DB_REP_LOGREADY"
     "DB_REP_PAGEDONE"
     "DB_SURPRISE_KID"
     "DB_SWAPBYTES"
     "DB_TIMEOUT"
     "DB_TXN_CKP"
     "DB_VERIFY_FATAL")

    ("040400"
     "DB_BUFFER_SMALL"
     "DB_DONOTINDEX"
     "DB_KEYEMPTY"
     "DB_KEYEXIST"
     "DB_LOCK_DEADLOCK"
     "DB_LOCK_NOTGRANTED"
     "DB_LOG_BUFFER_FULL"
     "DB_NOSERVER"
     "DB_NOSERVER_HOME"
     "DB_NOSERVER_ID"
     "DB_NOTFOUND"
     "DB_OLD_VERSION"
     "DB_PAGE_NOTFOUND"
     "DB_REP_DUPMASTER"
     "DB_REP_HANDLE_DEAD"
     "DB_REP_HOLDELECTION"
     "DB_REP_IGNORE"
     "DB_REP_ISPERM"
     "DB_REP_JOIN_FAILURE"
     "DB_REP_LOCKOUT"
     "DB_REP_NEWMASTER"
     "DB_REP_NEWSITE"
     "DB_REP_NOTPERM"
     "DB_REP_STARTUPDONE"
     "DB_REP_UNAVAIL"
     "DB_RUNRECOVERY"
     "DB_SECONDARY_BAD"
     "DB_VERIFY_BAD"
     "DB_VERSION_MISMATCH"
     "DB_ALREADY_ABORTED"
     "DB_DELETED"
     "DB_NEEDSPLIT"
     "DB_REP_BULKOVF"
     "DB_REP_EGENCHG"
     "DB_REP_LOGREADY"
     "DB_REP_PAGEDONE"
     "DB_SURPRISE_KID"
     "DB_SWAPBYTES"
     "DB_TIMEOUT"
     "DB_TXN_CKP"
     "DB_VERIFY_FATAL")

    ("040500"
     "DB_BUFFER_SMALL"
     "DB_DONOTINDEX"
     "DB_KEYEMPTY"
     "DB_KEYEXIST"
     "DB_LOCK_DEADLOCK"
     "DB_LOCK_NOTGRANTED"
     "DB_LOG_BUFFER_FULL"
     "DB_NOSERVER"
     "DB_NOSERVER_HOME"
     "DB_NOSERVER_ID"
     "DB_NOTFOUND"
     "DB_OLD_VERSION"
     "DB_PAGE_NOTFOUND"
     "DB_REP_DUPMASTER"
     "DB_REP_HANDLE_DEAD"
     "DB_REP_HOLDELECTION"
     "DB_REP_IGNORE"
     "DB_REP_ISPERM"
     "DB_REP_JOIN_FAILURE"
     "DB_REP_LOCKOUT"
     "DB_REP_NEWMASTER"
     "DB_REP_NEWSITE"
     "DB_REP_NOTPERM"
     "DB_REP_UNAVAIL"
     "DB_RUNRECOVERY"
     "DB_SECONDARY_BAD"
     "DB_VERIFY_BAD"
     "DB_VERSION_MISMATCH"
     "DB_ALREADY_ABORTED"
     "DB_DELETED"
     "DB_NEEDSPLIT"
     "DB_REP_BULKOVF"
     "DB_REP_EGENCHG"
     "DB_REP_LOGREADY"
     "DB_REP_PAGEDONE"
     "DB_SURPRISE_KID"
     "DB_SWAPBYTES"
     "DB_TIMEOUT"
     "DB_TXN_CKP"
     "DB_VERIFY_FATAL")

    ("040600"
     "DB_BUFFER_SMALL"
     "DB_DONOTINDEX"
     "DB_KEYEMPTY"
     "DB_KEYEXIST"
     "DB_LOCK_DEADLOCK"
     "DB_LOCK_NOTGRANTED"
     "DB_LOG_BUFFER_FULL"
     "DB_NOSERVER"
     "DB_NOSERVER_HOME"
     "DB_NOSERVER_ID"
     "DB_NOTFOUND"
     "DB_OLD_VERSION"
     "DB_PAGE_NOTFOUND"
     "DB_REP_DUPMASTER"
     "DB_REP_HANDLE_DEAD"
     "DB_REP_HOLDELECTION"
     "DB_REP_IGNORE"
     "DB_REP_ISPERM"
     "DB_REP_JOIN_FAILURE"
     "DB_REP_LEASE_EXPIRED"
     "DB_REP_LOCKOUT"
     "DB_REP_NEWSITE"
     "DB_REP_NOTPERM"
     "DB_REP_UNAVAIL"
     "DB_RUNRECOVERY"
     "DB_SECONDARY_BAD"
     "DB_VERIFY_BAD"
     "DB_VERSION_MISMATCH"
     "DB_ALREADY_ABORTED"
     "DB_DELETED"
     "DB_EVENT_NOT_HANDLED"
     "DB_NEEDSPLIT"
     "DB_REP_BULKOVF"
     "DB_REP_EGENCHG"
     "DB_REP_LOGREADY"
     "DB_REP_NEWMASTER"
     "DB_REP_PAGEDONE"
     "DB_SURPRISE_KID"
     "DB_SWAPBYTES"
     "DB_TIMEOUT"
     "DB_TXN_CKP"
     "DB_VERIFY_FATAL")))