300 lines
10 KiB
Racket
300 lines
10 KiB
Racket
#lang at-exp racket/base
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(require racket/function
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racket/match
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racket/list)
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(struct bibdb (raw bibs))
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(define (bibtex-parse ip)
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(define STRING-DB (make-hash))
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(define ENTRY-DB (make-hash))
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(define (perror ip sym fmt . args)
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(define loc (call-with-values (λ () (port-next-location ip)) list))
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(apply error sym (string-append fmt " @ line ~a column ~a byte ~a") (append args loc)))
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(define (read-while pred ip)
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(list->string
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(let loop ()
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(match (peek-char ip)
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[(and (? char?) (? pred))
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(cons (read-char ip)
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(loop))]
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[_
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empty]))))
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(define (read-until pred ip)
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(read-while (negate pred) ip))
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(define (slurp-whitespace ip)
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(read-while (λ (c) (and (char? c) (char-whitespace? c))) ip))
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(define (read-entries ip)
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(slurp-whitespace ip)
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(match (read-char ip)
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[#\%
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(read-line ip)
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(read-entries ip)]
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[#\@
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(read-entry ip)
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(read-entries ip)]
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[(? eof-object?)
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(void)]
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[c
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;; All other characters are comments.
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(read-entries ip)]))
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(define (read-entry ip)
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(match (read-until (λ (c) (or (char=? c #\{)
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(char=? c #\()))
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ip)
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[(app string-downcase "string")
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(slurp-whitespace ip)
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(match (read-char ip)
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[#\{
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(void)]
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[c
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(perror ip 'read-entry "Parsing entry, expected {, got ~v" c)])
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(define tag (read-tag ip))
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(slurp-whitespace ip)
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(match (read-char ip)
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[#\=
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(slurp-whitespace ip)
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(define string (read-value ip))
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(slurp-whitespace ip)
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(match (read-char ip)
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[#\}
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(hash-set! STRING-DB tag string)]
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[c
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(perror ip 'read-entry "Parsing string, expected }, got ~v; tag is ~v; string is ~v" c tag string)])]
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[c
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(perror ip 'read-entry "Parsing string, expected =, got ~v; tag is ~v" c tag)])]
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[(or (app string-downcase "comment")
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(app string-downcase "preamble"))
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(read-char ip)
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(let loop ()
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(read-until (λ (c) (or (char=? c #\{) (char=? c #\}))) ip)
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(match (read-char ip)
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[#\{
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(loop) (loop)]
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[#\}
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(void)]))]
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[typ
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(read-char ip)
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(slurp-whitespace ip)
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(define label (read-until (λ (c) (char=? c #\,)) ip))
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(read-char ip)
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(define alist
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(let loop ()
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(slurp-whitespace ip)
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(define atag (read-tag ip))
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(cond
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[(string=? "" atag)
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(read-char ip)
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(hash)]
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[else
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(slurp-whitespace ip)
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(match (read-char ip)
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[#\=
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(slurp-whitespace ip)
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(define aval (read-value ip))
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(slurp-whitespace ip)
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(match (read-char ip)
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[#\,
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(hash-set (loop) atag aval)]
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[#\}
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(hash atag aval)]
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[c
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(perror ip 'read-entry "Parsing entry, expected , or }, got ~v; label is ~v; atag is ~v; aval is ~v" c label atag aval)])]
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[c
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(perror ip 'read-entry "Parsing entry tag, expected =, got ~v; label is ~v; atag is ~v" c label atag)])])))
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(hash-set! ENTRY-DB label
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(hash-set alist 'type typ))]))
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(define (read-tag ip)
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(slurp-whitespace ip)
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(string-downcase
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(read-until
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(λ (c) (or (char-whitespace? c)
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(char=? c #\=)
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(char=? c #\{)
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(char=? c #\})))
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ip)))
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(define (read-braced-value ip)
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(read-char ip)
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(let loop ()
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(define first-part (read-until (λ (c) (or (char=? c #\{) (char=? c #\})))
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ip))
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(match (peek-char ip)
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[#\{
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(string-append first-part (read-value ip) (loop))]
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[#\}
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(read-char ip)
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first-part])))
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(define (read-value ip)
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(slurp-whitespace ip)
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(define first-part (read-value-single ip))
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(slurp-whitespace ip)
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(match (peek-char ip)
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[#\#
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(read-char ip)
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(string-append first-part (read-value ip))]
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[_
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first-part]))
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(define (read-value-single ip)
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(slurp-whitespace ip)
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(match (peek-char ip)
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[#\{
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(read-braced-value ip)]
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[#\"
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(read-char ip)
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(let loop ()
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(define first-part (read-until (λ (c) (or (char=? c #\{) (char=? c #\")))
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ip))
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(match (peek-char ip)
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[#\{
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(string-append first-part (read-braced-value ip) (loop))]
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[#\"
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(read-char ip)
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first-part]))]
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[(? char-numeric?)
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(read-while char-numeric? ip)]
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[(? char-alphabetic?)
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(define string-tag (read-until (λ (c) (or (char-whitespace? c)
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(char=? c #\,)))
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ip))
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(hash-ref STRING-DB string-tag
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(λ () string-tag))]
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[c
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(perror ip 'read-value "Parsing value, expected {, got ~v" c)]))
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(read-entries ip)
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(bibdb ENTRY-DB (make-hash)))
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(define (path->bibdb pth)
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(define bibdb
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(with-input-from-file
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pth
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(λ ()
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(port-count-lines! (current-input-port))
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(bibtex-parse (current-input-port)))))
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bibdb)
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(require scriblib/autobib
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scribble/manual)
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(define-syntax-rule
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(define-bibtex-cite bib-pth
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~cite-id citet-id generate-bibliography-id . options)
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(begin
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(define-cite autobib-cite autobib-citet generate-bibliography-id . options)
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(define-bibtex-cite* bib-pth
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autobib-cite autobib-citet
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~cite-id citet-id)))
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(define-syntax-rule
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(define-bibtex-cite* bib-pth
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autobib-cite autobib-citet
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~cite-id citet-id)
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(begin
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(define bibtex-db (path->bibdb bib-pth))
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(define ((make-citer citer) f . r)
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(apply citer
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(filter-map
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(λ (key)
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(and (not (string=? "\n" key))
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(generate-bib bibtex-db key)))
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(append-map (curry regexp-split #rx" +")
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(cons f r)))))
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(define ~cite-id (make-citer autobib-cite))
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(define citet-id (make-citer autobib-citet))))
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(define (parse-author as)
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(apply authors
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(for/list ([a (in-list (regexp-split #rx" *and *" as))])
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(match (regexp-split #rx" +" a)
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[(list one) (org-author-name one)]
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[(list one two) (author-name one two)]
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[(list-rest first rest) (author-name first (apply string-append (add-between rest " ")))]))))
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(define (parse-pages ps)
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(match ps
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[(regexp #rx"^([0-9]+)\\-+([0-9]+)$" (list _ f l))
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(list f l)]
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[#f
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#f]
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[_
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(error 'parse-pages "Invalid page format ~e" ps)]))
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(define (generate-bib db key)
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(match-define (bibdb raw bibs) db)
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(hash-ref! bibs key
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(λ ()
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(define the-raw (hash-ref raw key (λ () (error 'bibtex "Unknown citation ~e" key))))
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(define (raw-attr a [def #f])
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(hash-ref the-raw a def))
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(define (raw-attr* a)
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(hash-ref the-raw a
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(λ () (error 'bibtex "Key ~a is missing attribute ~a, has ~a"
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key a the-raw))))
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(match (raw-attr 'type)
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["misc"
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(make-bib #:title (raw-attr "title")
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#:author (parse-author (raw-attr "author"))
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#:date (raw-attr "year")
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#:url (raw-attr "url"))]
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["book"
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(make-bib #:title (raw-attr "title")
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#:author (parse-author (raw-attr "author"))
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#:date (raw-attr "year")
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#:is-book? #t
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#:url (raw-attr "url"))]
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["article"
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(make-bib #:title (raw-attr "title")
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#:author (parse-author (raw-attr "author"))
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#:date (raw-attr "year")
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#:location (journal-location (raw-attr* "journal")
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#:pages (parse-pages (raw-attr "pages"))
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#:number (raw-attr "number")
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#:volume (raw-attr "volume"))
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#:url (raw-attr "url"))]
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["inproceedings"
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(make-bib #:title (raw-attr "title")
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#:author (parse-author (raw-attr "author"))
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#:date (raw-attr "year")
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#:location (proceedings-location (raw-attr "booktitle"))
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#:url (raw-attr "url"))]
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["webpage"
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(make-bib #:title (raw-attr "title")
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#:author (parse-author (raw-attr "author"))
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#:date (raw-attr "year")
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#:url (raw-attr "url"))]
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["mastersthesis"
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(make-bib #:title (raw-attr "title")
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#:author (parse-author (raw-attr "author"))
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#:date (raw-attr "year")
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#:location (raw-attr "school")
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#:url (raw-attr "url"))]
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["techreport"
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(make-bib #:title (raw-attr "title")
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#:author (parse-author (raw-attr "author"))
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#:date (raw-attr "year")
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#:location
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(match* ((raw-attr "institution") (raw-attr "number"))
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[(#f #f) @elem{}]
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[(l #f) @elem{@|l|}]
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[(#f n) @elem{@|n|}]
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[(l n) @elem{@|l|, @|n|}])
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#:url (raw-attr "url"))]
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[_
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(make-bib #:title (format "~v" the-raw))]))))
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(provide (struct-out bibdb)
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path->bibdb
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bibtex-parse
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define-bibtex-cite
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define-bibtex-cite*)
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