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author | Ludovic Court`es | 2005-11-02 10:08:38 +0000 |
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committer | Ludovic Court`es | 2005-11-02 10:08:38 +0000 |
commit | b76d5e1b252967521f210eac10ddbf089dde8c6a (patch) | |
tree | 00fc81c51256991c04799d79a749bbdd5b9fad30 /legacy/bigloo/read.scm | |
parent | ba63b8d4780428d9f63f6ace7f49361b77401112 (diff) | |
parent | f553cb65b157b6df9563cefa593902d59301461b (diff) | |
download | skribilo-b76d5e1b252967521f210eac10ddbf089dde8c6a.tar.gz skribilo-b76d5e1b252967521f210eac10ddbf089dde8c6a.tar.lz skribilo-b76d5e1b252967521f210eac10ddbf089dde8c6a.zip |
Cleaned up the source tree and the installation process.
Patches applied:
* lcourtes@laas.fr--2005-mobile/skribilo--devel--1.2--patch-6
Cosmetic changes.
* lcourtes@laas.fr--2005-mobile/skribilo--devel--1.2--patch-7
Removed useless files, integrated packages.
* lcourtes@laas.fr--2005-mobile/skribilo--devel--1.2--patch-8
Removed useless files, integrated packages.
* lcourtes@laas.fr--2005-mobile/skribilo--devel--1.2--patch-9
Moved the STkLos and Bigloo code to `legacy'.
* lcourtes@laas.fr--2005-mobile/skribilo--devel--1.2--patch-10
Installed Autoconf/Automake machinery. Fixed a few things.
* lcourtes@laas.fr--2005-mobile/skribilo--devel--1.2--patch-11
Changes related to source-highlighting and to the manual.
git-archimport-id: lcourtes@laas.fr--2004-libre/skribilo--devel--1.2--patch-10
Diffstat (limited to 'legacy/bigloo/read.scm')
-rw-r--r-- | legacy/bigloo/read.scm | 482 |
1 files changed, 482 insertions, 0 deletions
diff --git a/legacy/bigloo/read.scm b/legacy/bigloo/read.scm new file mode 100644 index 0000000..91cd345 --- /dev/null +++ b/legacy/bigloo/read.scm @@ -0,0 +1,482 @@ +;*=====================================================================*/ +;* serrano/prgm/project/skribe/src/bigloo/read.scm */ +;* ------------------------------------------------------------- */ +;* Author : Manuel Serrano */ +;* Creation : Tue Dec 27 11:16:00 1994 */ +;* Last change : Mon Nov 8 13:30:32 2004 (serrano) */ +;* ------------------------------------------------------------- */ +;* Skribe's reader */ +;*=====================================================================*/ + +;*---------------------------------------------------------------------*/ +;* Le module */ +;*---------------------------------------------------------------------*/ +(module skribe_read + (export (skribe-read . port))) + +;*---------------------------------------------------------------------*/ +;* Global counteurs ... */ +;*---------------------------------------------------------------------*/ +(define *par-open* 0) + +;*---------------------------------------------------------------------*/ +;* Parenthesis mismatch (or unclosing) errors. */ +;*---------------------------------------------------------------------*/ +(define *list-error-level* 20) +(define *list-errors* (make-vector *list-error-level* #unspecified)) +(define *vector-errors* (make-vector *list-error-level* #unspecified)) + +;*---------------------------------------------------------------------*/ +;* Control variables. */ +;*---------------------------------------------------------------------*/ +(define *end-of-list* (cons 0 0)) +(define *dotted-mark* (cons 1 1)) + +;*---------------------------------------------------------------------*/ +;* skribe-reader-reset! ... */ +;*---------------------------------------------------------------------*/ +(define (skribe-reader-reset!) + (set! *par-open* 0)) + +;*---------------------------------------------------------------------*/ +;* read-error ... */ +;*---------------------------------------------------------------------*/ +(define (read-error msg obj port) + (let* ((obj-loc (if (epair? obj) + (match-case (cer obj) + ((at ?fname ?pos ?-) + pos) + (else + #f)) + #f)) + (loc (if (number? obj-loc) + obj-loc + (cond + ((>fx *par-open* 0) + (let ((open-key (-fx *par-open* 1))) + (if (<fx open-key (vector-length *list-errors*)) + (vector-ref *list-errors* open-key) + #f))) + (else + #f))))) + (if (fixnum? loc) + (error/location "skribe-read" msg obj (input-port-name port) loc) + (error "skribe-read" msg obj)))) + +;*---------------------------------------------------------------------*/ +;* make-list! ... */ +;*---------------------------------------------------------------------*/ +(define (make-list! l port) + (define (reverse-proper-list! l) + (let nr ((l l) + (r '())) + (cond + ((eq? (car l) *dotted-mark*) + (read-error "Illegal pair" r port)) + ((null? (cdr l)) + (set-cdr! l r) + l) + (else + (let ((cdrl (cdr l))) + (nr cdrl + (begin (set-cdr! l r) + l))))))) + (define (reverse-improper-list! l) + (let nr ((l (cddr l)) + (r (car l))) + (cond + ((eq? (car l) *dotted-mark*) + (read-error "Illegal pair" r port)) + ((null? (cdr l)) + (set-cdr! l r) + l) + (else + (let ((cdrl (cdr l))) + (nr cdrl + (begin (set-cdr! l r) + l))))))) + (cond + ((null? l) + l) + ((and (pair? l) (pair? (cdr l)) (eq? (cadr l) *dotted-mark*)) + (if (null? (cddr l)) + (car l) + (reverse-improper-list! l))) + (else + (reverse-proper-list! l)))) + +;*---------------------------------------------------------------------*/ +;* make-at ... */ +;*---------------------------------------------------------------------*/ +(define (make-at name pos) + (cond-expand + ((or bigloo2.4 bigloo2.5 bigloo2.6) + `(at ,name ,pos _)) + (else + `(at ,name ,pos)))) + +;*---------------------------------------------------------------------*/ +;* collect-up-to ... */ +;* ------------------------------------------------------------- */ +;* The first pair of the list is special because of source file */ +;* location. We want the location to be associated to the first */ +;* open parenthesis, not the last character of the car of the list. */ +;*---------------------------------------------------------------------*/ +(define-inline (collect-up-to ignore kind port) + (let ((name (input-port-name port))) + (let* ((pos (input-port-position port)) + (item (ignore))) + (if (eq? item *end-of-list*) + '() + (let loop ((acc (econs item '() (make-at name pos)))) + (let ((item (ignore))) + (if (eq? item *end-of-list*) + acc + (loop (let ((new-pos (input-port-position port))) + (econs item + acc + (make-at name new-pos))))))))))) + +;*---------------------------------------------------------------------*/ +;* read-quote ... */ +;*---------------------------------------------------------------------*/ +(define (read-quote kwote port ignore) + (let* ((pos (input-port-position port)) + (obj (ignore))) + (if (or (eof-object? obj) (eq? obj *end-of-list*)) + (error/location "read" + "Illegal quotation" + kwote + (input-port-name port) + pos)) + (econs kwote + (cons obj '()) + (make-at (input-port-name port) pos)))) + +;*---------------------------------------------------------------------*/ +;* *sexp-grammar* ... */ +;*---------------------------------------------------------------------*/ +(define *sexp-grammar* + (regular-grammar ((float (or (: (* digit) "." (+ digit)) + (: (+ digit) "." (* digit)))) + (letter (in ("azAZ") (#a128 #a255))) + (special (in "!@~$%^&*></-_+\\=?.:{}")) + (kspecial (in "!@~$%^&*></-_+\\=?.")) + (quote (in "\",'`")) + (paren (in "()")) + (id (: (* digit) + (or letter special) + (* (or letter special digit (in ",'`"))))) + (kid (: (* digit) + (or letter kspecial) + (* (or letter kspecial digit (in ",'`"))))) + (blank (in #\Space #\Tab #a012 #a013))) + + ;; newlines + ((+ #\Newline) + (ignore)) + + ;; blank lines + ((+ blank) + (ignore)) + + ;; comments + ((: ";" (* all)) + (ignore)) + + ;; the interpreter header or the dsssl named constants + ((: "#!" (+ (in letter))) + (let* ((str (the-string))) + (cond + ((string=? str "#!optional") + boptional) + ((string=? str "#!rest") + brest) + ((string=? str "#!key") + bkey) + (else + (ignore))))) + + ;; characters + ((: (uncase "#a") (= 3 digit)) + (let ((string (the-string))) + (if (not (=fx (the-length) 5)) + (error/location "skribe-read" + "Illegal ascii character" + string + (input-port-name (the-port)) + (input-port-position (the-port))) + (integer->char (string->integer (the-substring 2 5)))))) + ((: "#\\" (or letter digit special (in "|#; []" quote paren))) + (string-ref (the-string) 2)) + ((: "#\\" (>= 2 letter)) + (let ((char-name (string->symbol + (string-upcase! + (the-substring 2 (the-length)))))) + (case char-name + ((NEWLINE) + #\Newline) + ((TAB) + #\tab) + ((SPACE) + #\space) + ((RETURN) + (integer->char 13)) + (else + (error/location "skribe-read" + "Illegal character" + (the-string) + (input-port-name (the-port)) + (input-port-position (the-port))))))) + + ;; ucs-2 characters + ((: "#u" (= 4 xdigit)) + (integer->ucs2 (string->integer (the-substring 2 6) 16))) + + ((: "\"" (* (or (out #a000 #\\ #\") (: #\\ all))) "\"") + (let ((str (the-substring 1 (-fx (the-length) 1)))) + (let ((str (the-substring 0 (-fx (the-length) 1)))) + (escape-C-string str)))) + ;; ucs2 strings + ((: "#u\"" (* (or (out #a000 #\\ #\") (: #\\ all))) "\"") + (let ((str (the-substring 3 (-fx (the-length) 1)))) + (utf8-string->ucs2-string str))) + + ;; fixnums + ((: (? (in "-+")) (+ digit)) + (the-fixnum)) + ((: "#o" (? (in "-+")) (+ (in ("07")))) + (string->integer (the-substring 2 (the-length)) 8)) + ((: "#d" (? (in "-+")) (+ (in ("09")))) + (string->integer (the-substring 2 (the-length)) 10)) + ((: "#x" (? (in "-+")) (+ (in (uncase (in ("09af")))))) + (string->integer (the-substring 2 (the-length)) 16)) + ((: "#e" (? (in "-+")) (+ digit)) + (string->elong (the-substring 2 (the-length)) 10)) + ((: "#l" (? (in "-+")) (+ digit)) + (string->llong (the-substring 2 (the-length)) 10)) + + ;; flonum + ((: (? (in "-+")) + (or float + (: (or float (+ digit)) (in "eE") (? (in "+-")) (+ digit)))) + (the-flonum)) + + ;; doted pairs + ("." + (if (<=fx *par-open* 0) + (error/location "read" + "Illegal token" + #\. + (input-port-name (the-port)) + (input-port-position (the-port))) + *dotted-mark*)) + + ;; unspecified and eof-object + ((: "#" (in "ue") (+ (in "nspecified-objt"))) + (let ((symbol (string->symbol + (string-upcase! + (the-substring 1 (the-length)))))) + (case symbol + ((UNSPECIFIED) + unspec) + ((EOF-OBJECT) + beof) + (else + (error/location "read" + "Illegal identifier" + symbol + (input-port-name (the-port)) + (input-port-position (the-port))))))) + + ;; booleans + ((: "#" (uncase #\t)) + #t) + ((: "#" (uncase #\f)) + #f) + + ;; keywords + ((or (: ":" kid) (: kid ":")) + ;; since the keyword expression is also matched by the id + ;; rule, keyword rule has to be placed before the id rule. + (the-keyword)) + + ;; identifiers + (id + ;; this rule has to be placed after the rule matching the `.' char + (the-symbol)) + ((: "|" (+ (or (out #a000 #\\ #\|) (: #\\ all))) "|") + (if (=fx (the-length) 2) + (the-symbol) + (let ((str (the-substring 0 (-fx (the-length) 1)))) + (string->symbol (escape-C-string str))))) + + ;; quotations + ("'" + (read-quote 'quote (the-port) ignore)) + ("`" + (read-quote 'quasiquote (the-port) ignore)) + ("," + (read-quote 'unquote (the-port) ignore)) + (",@" + (read-quote 'unquote-splicing (the-port) ignore)) + + ;; lists + (#\( + ;; if possible, we store the opening parenthesis. + (if (and (vector? *list-errors*) + (<fx *par-open* (vector-length *list-errors*))) + (vector-set! *list-errors* + *par-open* + (input-port-position (the-port)))) + ;; we increment the number of open parenthesis + (set! *par-open* (+fx 1 *par-open*)) + ;; and then, we compute the result list... + (make-list! (collect-up-to ignore "list" (the-port)) (the-port))) + (#\) + ;; we decrement the number of open parenthesis + (set! *par-open* (-fx *par-open* 1)) + (if (<fx *par-open* 0) + (begin + (warning/location (input-port-name (the-port)) + (input-port-position (the-port)) + "read" + "Superfluous closing parenthesis `" + (the-string) + "'") + (set! *par-open* 0) + (ignore)) + *end-of-list*)) + + ;; list of strings + (#\[ + (let ((exp (read/rp *text-grammar* (the-port)))) + (list 'quasiquote exp))) + + ;; vectors + ("#(" + ;; if possible, we store the opening parenthesis. + (if (and (vector? *vector-errors*) + (<fx *par-open* (vector-length *vector-errors*))) + (let ((pos (input-port-position (the-port)))) + (vector-set! *vector-errors* *par-open* pos))) + ;; we increment the number of open parenthesis + (set! *par-open* (+fx 1 *par-open*)) + (list->vector (reverse! (collect-up-to ignore "vector" (the-port))))) + + ;; error or eof + (else + (let ((port (the-port)) + (char (the-failure))) + (if (eof-object? char) + (cond + ((>fx *par-open* 0) + (let ((open-key (-fx *par-open* 1))) + (skribe-reader-reset!) + (if (and (<fx open-key (vector-length *list-errors*)) + (fixnum? (vector-ref *list-errors* open-key))) + (error/location "skribe-read" + "Unclosed list" + char + (input-port-name port) + (vector-ref *list-errors* open-key)) + (error "skribe-read" + "Unexpected end-of-file" + "Unclosed list")))) + (else + (reset-eof port) + char)) + (error/location "skribe-read" + "Illegal char" + (illegal-char-rep char) + (input-port-name port) + (input-port-position port))))))) + +;*---------------------------------------------------------------------*/ +;* *text-grammar* ... */ +;* ------------------------------------------------------------- */ +;* The grammar that parses texts (the [...] forms). */ +;*---------------------------------------------------------------------*/ +(define *text-grammar* + (regular-grammar () + ((: (* (out ",[]\\")) #\]) + (let* ((port (the-port)) + (name (input-port-name port)) + (pos (input-port-position port)) + (loc (make-at name pos)) + (item (the-substring 0 (-fx (the-length) 1)))) + (econs item '() loc))) + ((: (* (out ",[\\")) ",]") + (let* ((port (the-port)) + (name (input-port-name port)) + (pos (input-port-position port)) + (loc (make-at name pos)) + (item (the-substring 0 (-fx (the-length) 1)))) + (econs item '() loc))) + ((: (* (out ",[]\\")) #\,) + (let* ((port (the-port)) + (name (input-port-name port)) + (pos (input-port-position port)) + (loc (make-at name pos)) + (item (the-substring 0 (-fx (the-length) 1))) + (sexp (read/rp *sexp-grammar* (the-port))) + (rest (ignore))) + (if (string=? item "") + (cons (list 'unquote sexp) rest) + (econs item (cons (list 'unquote sexp) rest) loc)))) + ((or (+ (out ",[]\\")) + (+ #\Newline) + (: (* (out ",[]\\")) #\, (out "([]\\"))) + (let* ((port (the-port)) + (name (input-port-name port)) + (pos (input-port-position port)) + (loc (make-at name pos)) + (item (the-string)) + (rest (ignore))) + (econs item rest loc))) + ("\\\\" + (cons "\\" (ignore))) + ("\\n" + (cons "\n" (ignore))) + ("\\t" + (cons "\t" (ignore))) + ("\\]" + (cons "]" (ignore))) + ("\\[" + (cons "[" (ignore))) + ("\\," + (cons "," (ignore))) + (#\\ + (cons "\\" (ignore))) + (else + (let ((c (the-failure)) + (port (the-port))) + (define (err msg) + (error/location "skribe-read-text" + msg + (the-failure) + (input-port-name port) + (input-port-position port))) + (cond + ((eof-object? c) + (err "Illegal `end of file'")) + ((char=? c #\[) + (err "Illegal nested `[...]' form")) + (else + (err "Illegal string character"))))))) + +;*---------------------------------------------------------------------*/ +;* skribe-read ... */ +;*---------------------------------------------------------------------*/ +(define (skribe-read . input-port) + (cond + ((null? input-port) + (read/rp *sexp-grammar* (current-input-port))) + ((not (input-port? (car input-port))) + (error "read" "type `input-port' expected" (car input-port))) + (else + (let ((port (car input-port))) + (if (closed-input-port? port) + (error "read" "Illegal closed input port" port) + (read/rp *sexp-grammar* port)))))) + |