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;;; "dbrowse.scm" relational-database-browser
; Copyright 1996, 1997 Aubrey Jaffer
;
;Permission to copy this software, to redistribute it, and to use it
;for any purpose is granted, subject to the following restrictions and
;understandings.
;
;1. Any copy made of this software must include this copyright notice
;in full.
;
;2. I have made no warrantee or representation that the operation of
;this software will be error-free, and I am under no obligation to
;provide any services, by way of maintenance, update, or otherwise.
;
;3. In conjunction with products arising from the use of this
;material, there shall be no use of my name in any advertising,
;promotional, or sales literature without prior written consent in
;each case.
(require 'database-utilities)
(require 'printf)
(define browse:db #f)
(define (browse . args)
(define table-name #f)
(cond ((null? args))
((procedure? (car args))
(set! browse:db (car args))
(set! args (cdr args)))
((string? (car args))
(set! browse:db (open-database (car args)))
(set! args (cdr args))))
(cond ((null? args))
(else (set! table-name (car args))))
(let* ((open-table (browse:db 'open-table))
(catalog (and open-table (open-table '*catalog-data* #f))))
(cond ((not catalog)
(slib:error 'browse "could not open catalog"))
((not table-name)
(browse:display-dir '*catalog-data* catalog))
(else
(let ((table (open-table table-name #f)))
(cond (table (browse:display-table table-name table)
(table 'close-table))
(else (slib:error 'browse "could not open table"
table-name))))))))
(define (browse:display-dir table-name table)
(printf "%s Tables:
" table-name)
((table 'for-each-row)
(lambda (row)
(printf " %s
"
(car row)))))
(define (browse:display-table table-name table)
(let* ((width 18)
(dw (string-append "%-" (number->string width)))
(dwp (string-append "%-" (number->string width) "."
(number->string (+ -1 width))))
(dwp-string (string-append dwp "s"))
(dwp-any (string-append dwp "a"))
(dw-integer (string-append dw "d"))
(underline (string-append (make-string (+ -1 width) #\=) " "))
(form ""))
(printf "Table: %s
" table-name)
(for-each (lambda (name) (printf dwp-string name))
(table 'column-names))
(newline)
(for-each (lambda (foreign) (printf dwp-any foreign))
(table 'column-foreigns))
(newline)
(for-each (lambda (domain) (printf dwp-string domain))
(table 'column-domains))
(newline)
(for-each (lambda (type)
(case type
((integer number uint base-id)
(set! form (string-append form dw-integer)))
((boolean domain expression atom)
(set! form (string-append form dwp-any)))
((string symbol)
(set! form (string-append form dwp-string)))
(else (slib:error 'browse:display-table "unknown type" type)))
(printf dwp-string type))
(table 'column-types))
(newline)
(set! form (string-append form "
"))
(for-each (lambda (domain) (printf underline))
(table 'column-domains))
(newline)
((table 'for-each-row)
(lambda (row)
(apply printf form row)))))
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