606 lines
20 KiB
Scheme
606 lines
20 KiB
Scheme
;;; nyacc/lang/c99/util2.scm - C processing code
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;;;
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;;; Copyright (C) 2015,2016 Matthew R. Wette
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;;;
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;;; This program is free software: you can redistribute it and/or modify
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;;; it under the terms of the GNU General Public License as published by
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;;; the Free Software Foundation, either version 3 of the License, or
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;;; (at your option) any later version.
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;;;
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;;; This program is distributed in the hope that it will be useful,
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;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;;; GNU General Public License for more details.
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;;;
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;;; You should have received a copy of the GNU General Public License
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;;; along with this program. If not, see <http://www.gnu.org/licenses/>.
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;; utilities for processing output trees
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;; The idea is to convert declarations into something like
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;; @example
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;; const char *args[21]; /* command arguments */
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;; @end example
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;; @noindent
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;; into
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;; @example
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;; ("args" (comment " command arguments ")
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;; (array-of 21) (pointer-to) (fixed "char"))
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;; @end example
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;; @noindent
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;; or without the comment. It is a question whether we need the fixed part.
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;; In addition, we want to reduce to a set of canonical types. So something
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;; like @code{foo_t} should be expanded.
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;; KEEPING STRUCTS ENUMS etc
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;; if have typename and want to keep it, then change
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;; (typename "foo_t")
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;; to
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;; (typename (@ (base "struct")) "foo_t")
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;; ALSO
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;; (make-proxy comp-udecl) => udecl
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;; (revert-proxy udecl) => comp-udecl
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(define-module (nyacc lang c99 util2)
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#:export (tree->udict
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stripdown stripdown-2
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udecl->mspec
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udecl->mspec/comm
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unwrap-decl
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canize-enum-def-list
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fix-fields
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fixed-width-int-names
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match-decl match-comp-decl
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declr->ident
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expand-decl-typerefs
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)
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#:use-module (nyacc lang c99 pprint)
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#:use-module (ice-9 pretty-print)
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#:use-module (srfi srfi-1)
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#:use-module ((sxml fold) #:select (foldts foldts*))
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#:use-module (sxml match)
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#:use-module (nyacc lang util)
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#:use-module (nyacc lang c99 pprint)
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)
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;; Use the term @dfn{udecl}, or unit-declaration, for a declaration which has
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;; only one decl-item. That is where,
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;; @example
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;; @end example
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;; (decl (decl-spec-list ...) (init-declr-list (init-declr ...) ...))
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;; @noindent
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;; has been replaced by
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;; (decl (decl-spec-list ...) (init-declr ...))
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;; ...
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;; @example
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;; @end example
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;; mspec is
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;; ("foo" (pointer-to) (array-of 3) (fixed-type "unsigned int"))
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;; which can be converted to
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;; ("(*foo) (array-of 3) (fixed-type "unsigned int"))
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;; which can be converted to
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;; (("((*foo)[0])" (fixed-type "unsigned int"))
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;; ("((*foo)[1])" (fixed-type "unsigned int"))
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;; ("((*foo)[2])" (fixed-type "unsigned int"))
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;; may need to replace (typename "int32_t") with (fixed-type "int32_t")
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;; @deffn declr->ident declr => (ident "name")
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;; just match the declarator
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;; (init-declr <declr> [<initzer>])
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;; See also: declr->id-name in body.scm.
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(define (declr->ident declr)
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(sxml-match declr
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((init-declr ,declr . ,rest) (declr->ident declr))
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((comp-declr ,declr) (declr->ident declr))
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((param-declr ,declr) (declr->ident declr))
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((ident ,name) declr)
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((array-of ,dir-declr ,array-spec) (declr->ident dir-declr))
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((array-of ,dir-declr) (declr->ident dir-declr))
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((ptr-declr ,pointer ,dir-declr) (declr->ident dir-declr))
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((ftn-declr ,dir-declr ,rest ...) (declr->ident dir-declr))
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((scope ,declr) (declr->ident declr))
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(,otherwise (throw 'util-error "c99/util2: unknown declarator: " declr))))
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;; @deffn unwrap-decl decl seed => seed
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;; This is a fold to break up multiple declarators.
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;; @example
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;; (decl (decl-spec-list ...) (init-declr-list (init-declr ...) ...))
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;; =>
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;; ((decl (decl-spec-list ...) (init-declr ...))
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;; (decl (decl-spec-list ...) (init-declr ...))
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;; ...)
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;; @end example
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(define (unwrap-decl decl seed)
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(cond
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((not (eqv? 'decl (car decl))) seed)
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((< (length decl) 3) seed) ; this should catch struct-ref etc.
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(else
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(let* ((tag (sx-ref decl 0))
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(attr (sx-attr decl))
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(spec (sx-ref decl 1)) ; (decl-spec-list ...)
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(id-l (sx-ref decl 2)) ; (init-declr-list ...)
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(tail (sx-tail decl 3))) ; comment
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(let iter ((res seed) (idl (cdr id-l)))
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(if (null? idl) res
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(let* ((declr (sx-ref (car idl) 1))
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(ident (declr->ident declr))
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(name (cadr ident)))
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(iter (cons (if attr
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(cons* tag attr spec (car idl) tail)
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(cons* tag spec (car idl) tail))
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res)
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(cdr idl)))))))))
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;; @deffn tree->udict tree => udict
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;; Turn a C parse tree into a assoc-list of names and definitions.
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;; This will unwrap @code{init-declr-list} into list of decls w/
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;; @code{init-declr}.
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;; BUG: need to add struct and union defn's: struct foo { int x; };
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;; how to deal with this
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;; lookup '(struct . "foo"), "struct foo", ???
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;; wanted "struct" -> dict but that is not great
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;; solution: match-decl => '(struct . "foo") then filter to generate
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;; ("struct" ("foo" . decl) ..)
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;; ("union" ("bar" . decl) ..)
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(define (tree->udict tree)
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(if (pair? tree)
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;;(reverse (fold match-decl '() (cdr tree)))
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(fold match-decl '() (cdr tree))
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'()))
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;; @deffn match-decl decl seed
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;; This procedure is intended to be used with @code{fold}. It breaks up
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;; up the init-declr-list into individual init-declr items and associates
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;; with the identifier being declared. So this is a fold iterator to
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;; provide a dictionary of declared names.
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;; @example
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;; (decl (decl-spec-list ...) (init-declr-list (init-declr ...) ...))
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;; @end example
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;; @noindent
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;; has been replaced by
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;; @example
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;; (decl (decl-spec-list ...) (init-declr ...))
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;; (decl (decl-spec-list ...) ...)
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;; @end example
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;; Here we generate a dictionary of all declared items:
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;; @example
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;; (let* ((sx0 (with-input-from-file src-file parse-c))
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;; (sx1 (merge-inc-trees! sx0))
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;; (name-dict (fold match-decl-1 '() (cdr sx1))))
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;; @end example
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(define (match-decl decl seed)
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(let* ((tag (sx-ref decl 0)) (attr (sx-attr decl)))
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(case tag
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((decl)
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(let* ((spec (sx-ref decl 1)) ; (decl-spec-list ...)
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(tbd (sx-ref decl 2))) ; (init-declr-list ...) OR ...
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(cond
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((or (not tbd) (eqv? 'comment (sx-tag tbd)))
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(display "ISSUE: some decls have no init-declr-list\n")
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;; no init-declr-list => struct or union def
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;;(display "spec:\n") (pretty-print spec)
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(sxml-match spec
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((decl-spec-list
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(type-spec
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(struct-def (ident ,name) . ,rest2) . ,rest1))
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(acons `(struct . ,name) decl seed))
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((decl-spec-list
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(type-spec
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(union-def (ident ,name) . ,rest2) . ,rest1))
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(acons `(union . ,name) decl seed))
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(,otherwise
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(display "otherwise:\n") (pretty-print (cdr spec))
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seed)))
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(else ;; decl with init-declr-list
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(let* ((id-l tbd) (tail (sx-tail decl 3)))
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(let iter ((res seed) (idl (cdr id-l)))
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(if (null? idl) res
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(let* ((declr (sx-ref (car idl) 1))
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(ident (declr->ident declr))
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(name (cadr ident)))
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(iter
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(acons name
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(if attr
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(cons* tag attr spec (car idl) tail)
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(cons* tag spec (car idl) tail))
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res)
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(cdr idl))))))))))
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(else seed))))
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;; @deffn match-comp-decl decl seed
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;; This will turn
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;; @example
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;; (comp-decl (decl-spec-list (type-spec "int"))
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;; (comp-decl-list (comp-decl (ident "a")) (comp-decl (ident "b"))))
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;; @end example
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;; @noindent
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;; into
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;; @example
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;; ("a" . (comp-decl (decl-spec-list ...) (comp-decl (ident "a"))))
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;; ("b" . (comp-decl (decl-spec-list ...) (comp-decl (ident "b"))))
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;; @end example
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;; @noindent
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;; This is coded to be used with fold-right in order to preserve order
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;; in @code{struct} and @code{union} field lists.
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(define (match-comp-decl decl seed)
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(if (not (eqv? 'comp-decl (car decl))) seed
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(let* ((tag (sx-ref decl 0))
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(attr (sx-attr decl))
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(spec (sx-ref decl 1)) ; (type-spec ...)
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(id-l (sx-ref decl 2)) ; (init-declr-list ...)
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(tail (sx-tail decl 3))) ; opt comment, different here
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;;(simple-format #t "1: ~S\n" id-l)
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(let iter ((res seed) (idl (cdr id-l)))
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(if (null? idl) res
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(let* ((declr (sx-ref (car idl) 1))
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(ident (declr->ident declr))
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(name (cadr ident)))
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;;(pretty-print `(comp-decl ,spec ,(car idl) . ,tail))
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(acons name
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(if attr
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(cons* tag attr spec (car idl) tail)
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(cons* tag spec (car idl) tail))
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(iter res (cdr idl)))))))))
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;; @deffn find-special udecl-alist seed => ..
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;; NOT DONE
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;; @example
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;; '((struct . ("foo" ...) ...)
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;; (union . ("bar" ...) ...)
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;; (enum . ("bar" ...) ...)
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;; seed)
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;; @end example
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(define (find-special udecl-alist seed)
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(let iter ((struct '()) (union '()) (enum '()) (udal udecl-alist))
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(if (null? udal) (cons* (cons 'struct struct)
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(cons 'union union)
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(cons 'enum enum)
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seed)
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'())))
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(define tmap-fmt
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'(("char" "%hhd")
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("unsigned char" "%hhu")
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("short int" "%hd")
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("unsigned short int" "%hu")
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("int" "%d")
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("unsigned int" "%u")
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("long int" "%ld")
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("unsigned long int" "%lu")
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("long long int" "%lld")
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("unsigned long long int" "%llu")))
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(define fixed-width-int-names
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'("int8_t" "uint8_t" "int16_t" "uint16_t"
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"int32_t" "uint32_t" "int64_t" "uint64_t"))
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;; @deffn typedef-decl? decl)
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(define (typedef-decl? decl)
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(sxml-match decl
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((decl (decl-spec-list (stor-spec (typedef)) . ,r1) . ,r2) #t)
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(,otherwise #f)))
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;; @deffn splice-declarators orig-declr tdef-declr =>
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;; Splice the original declarator into the typedef declarator.
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;; This is a helper for @code{expand-*-typename-ref} procecures.
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(define (splice-declarators orig-declr tdef-declr)
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(define (fD seed tree) ; => (values seed tree)
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(sxml-match tree
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((param-list . ,rest) (values tree '())) ; don't process
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((ident ,name) (values (reverse (cadr orig-declr)) '())) ; replace
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(,otherwise (values '() tree))))
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(define (fU seed kseed tree)
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(let ((ktree (case (car kseed)
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((param-list ident) kseed)
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(else (reverse kseed)))))
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(if (null? seed) ktree (cons ktree seed))))
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(define (fH seed tree)
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(cons tree seed))
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;; This cons transfers the tag from orig-declr to the result.
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(cons
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(car orig-declr) ; init-declr or comp-declr
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(cdr (foldts* fD fU fH '() tdef-declr)))) ; always init-declr
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;; @deffn repl-typespec decl-spec-list replacement
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;; This is a helper for expand-decl-typerefs
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(define (repl-typespec decl-spec-list replacement)
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(fold-right
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(lambda (item seed)
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(cond ((symbol? item) (cons item seed))
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((eqv? 'type-spec (car item))
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(if (pair? (car replacement))
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(append replacement seed)
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(cons replacement seed)))
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(else (cons item seed))))
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'() decl-spec-list))
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;; @deffn expand-decl-typerefs udecl udecl-dict => udecl
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;; Given a declaration or component-declaration, expand all typename,
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;; struct, union and enum refs.
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;; @example
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;; typedef const int (*foo_t)(int a, double b);
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;; extern foo_t fctns[2];
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;; @noindent
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;; This routine should create an init-declarator associated with
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;; @end example
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;; extern {const int} (*{fctns[2]})(int a, double b);
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;; @end example
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;; @noindent
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;; Cool. Eh? (but is it done?)
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(define* (expand-decl-typerefs udecl udecl-dict #:key (keep '()))
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(display "FIXME: some decls have no init-declr-list\n")
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;; between adding (init-declr-list) to those or having predicate
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;; (has-init-declr? decl)
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(let* ((tag (sx-tag udecl)) ; decl or comp-decl
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(attr (sx-attr udecl)) ; (@ ...)
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(specl (sx-ref udecl 1)) ; decl-spec-list
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(declr (or (sx-find 'init-declr udecl)
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(sx-find 'comp-declr udecl)))
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(tail (if declr (sx-tail udecl 3) (sx-tail udecl 2))) ; opt comment
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(tspec (cadr (sx-find 'type-spec specl))))
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;;(simple-format #t "=D> ~S\n" decl-spec-list)
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;;(simple-format #t "init-declr: ~S\n" init-declr)
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(case (car tspec)
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((typename)
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(cond
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((member (cadr tspec) keep)
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udecl)
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#;((member (cadr tspec) fixed-width-int-names)
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;; Convert it to @code{fixed-type}.
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(let* ((name (cadr tspec))
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(fixd-tspec `(type-spec (fixed-type ,name)))
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(fixd-specl (repl-typespec specl fixd-tspec))
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;; TODO add attr
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(fixed-udecl (cons* tag fixd-specl declr tail)))
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;;(expand-decl-typerefs fixed-udecl udecl-dict))) ; not needed ?
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fixed-udecl))
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(else
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;; splice in the typedef
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(let* ((name (sx-ref tspec 1))
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(decl (assoc-ref udecl-dict name)) ; decl for typename
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(tdef-specl (sx-ref decl 1)) ; decl-spec-list for typename
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(tdef-declr (sx-ref decl 2)) ; init-declr for typename
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;; splice the typedef specifiers into target:
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(fixd-specl (repl-typespec specl (sx-tail tdef-specl 2)))
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(fixd-declr (splice-declarators declr tdef-declr))
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(fixed-udecl (cons* tag fixd-specl fixd-declr tail)))
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(expand-decl-typerefs fixed-udecl udecl-dict #:keep keep)))))
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((struct-ref union-ref)
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(simple-format (current-error-port)
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"+++ c99/util2: struct/union-ref: more to do?\n")
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;;(simple-format #t "\nstruct-ref:\n") (pretty-print udecl)
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udecl)
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((struct-def union-def)
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(let* ((ident (sx-find 'ident tspec))
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(field-list (sx-find 'field-list tspec))
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(orig-flds (cdr field-list))
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(unit-flds (map cdr (fold-right match-comp-decl '() orig-flds)))
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(fixd-flds (map
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(lambda (fld)
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(expand-decl-typerefs fld udecl-dict #:keep keep))
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unit-flds))
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(fixd-tspec
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(if #f ;;ident
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`(type-spec (struct-def ,ident (field-list ,@fixd-flds)))
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`(type-spec (struct-def (field-list ,@fixd-flds)))))
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(fixd-specl (repl-typespec specl fixd-tspec)))
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(if declr (cons* tag fixd-specl declr tail)
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(cons* tag fixd-specl tail))))
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((enum-def)
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(let* ((enum-def-list (sx-find 'enum-def-list tspec))
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(fixd-def-list (canize-enum-def-list enum-def-list))
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(fixd-tspec `(type-spec (enum-def ,fixd-def-list)))
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(fixd-specl (repl-typespec specl fixd-tspec))
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(fixed-decl (cons* tag fixd-specl declr tail))) ;; !!!
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fixed-decl))
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((enum-ref)
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(simple-format (current-error-port) "chack: enum-ref NOT DONE\n")
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udecl)
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(else udecl))))
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;; @deffn canize-enum-def-list
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;; Fill in constants for all entries of an enum list.
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(define (canize-enum-def-list enum-def-list)
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(define (get-used edl)
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(let iter ((uzd '()) (edl edl))
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(cond
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((null? edl) uzd)
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((assq-ref (cdar edl) 'p-expr) =>
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(lambda (x)
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(iter (cons (string->number (cadar x)) uzd) (cdr edl))))
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(else
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(iter uzd (cdr edl))))))
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(let ((used (get-used (cdr enum-def-list))))
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(let iter ((rez '()) (ix 0) (edl (cdr enum-def-list)))
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(cond
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((null? edl) (cons (car enum-def-list) (reverse rez)))
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((assq-ref (cdar edl) 'p-expr)
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(iter (cons (car edl) rez) ix (cdr edl)))
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(else
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(let* ((ix1 (let iter ((ix (1+ ix)))
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(if (memq ix used) (iter (1+ ix)) ix)))
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(is1 (number->string ix1)))
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|
(iter (cons (append (car edl) `((p-expr (fixed ,is1)))) rez)
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|
ix1 (cdr edl))))))))
|
|
|
|
;; @deffn stripdown udecl decl-dict => decl
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|
;; 1) remove stor-spec
|
|
;; 2) expand typenames
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|
;; @example
|
|
;; typedef int *x_t;
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|
;; x_t a[10];
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|
;; (spec (typename x_t)) (init-declr (array-of 10 (ident a)))
|
|
;; (spec (typedef) (fixed-type "int")) (init-declr (pointer) (ident "x_t"))
|
|
;; =>
|
|
;; [TO BE DOCUMENTED]
|
|
;; @end example
|
|
(define* (stripdown udecl decl-dict #:key (keep '()))
|
|
|
|
;;(define strip-list '(stor-spec type-qual comment))
|
|
(define strip-list '(stor-spec type-qual))
|
|
|
|
(define (fsD seed tree)
|
|
'())
|
|
|
|
(define (fsU seed kseed tree)
|
|
(if (memq (car tree) strip-list)
|
|
seed
|
|
(if (null? seed)
|
|
(reverse kseed)
|
|
(cons (reverse kseed) seed))))
|
|
|
|
(define (fsH seed tree)
|
|
(cons tree seed))
|
|
|
|
(let* ((xdecl (expand-decl-typerefs udecl decl-dict #:keep keep))
|
|
(tag (sx-tag xdecl))
|
|
(attr (sx-attr xdecl))
|
|
(specl (sx-ref xdecl 1))
|
|
(declr (sx-ref xdecl 2))
|
|
(specl1 (foldts fsD fsU fsH '() specl)))
|
|
(list tag specl1 declr)))
|
|
|
|
;; This one experimental for guile ffi.
|
|
(define* (stripdown-2 udecl decl-dict #:key (keep '()))
|
|
|
|
;;(define strip-list '(stor-spec type-qual comment))
|
|
(define strip-list '(stor-spec type-qual))
|
|
|
|
(define (fsD seed tree)
|
|
'())
|
|
|
|
(define (fsU seed kseed tree)
|
|
(if (memq (car tree) strip-list)
|
|
seed
|
|
(if (null? seed)
|
|
(reverse kseed)
|
|
(cons (reverse kseed) seed))))
|
|
|
|
(define (fsH seed tree)
|
|
(cons tree seed))
|
|
|
|
(let* ((speclt (sx-tail udecl 1))) ; decl-spec-list tail
|
|
;; don't expand typedefs, structure specs etc,
|
|
(cond
|
|
((and (eqv? 'stor-spec (caar speclt))
|
|
(eqv? 'typedef (cadar speclt)))
|
|
udecl)
|
|
;; lone struct ref
|
|
(else
|
|
(let* ((xdecl (expand-decl-typerefs udecl decl-dict #:keep keep))
|
|
(tag (sx-tag xdecl))
|
|
(attr (sx-attr xdecl))
|
|
(specl (sx-ref xdecl 1))
|
|
(declr (sx-ref xdecl 2))
|
|
(specl1 (foldts fsD fsU fsH '() specl)))
|
|
(list tag specl1 declr))))
|
|
))
|
|
|
|
|
|
;; @deffn udecl->mspec sudecl
|
|
;; Turn a stripped-down unit-declaration into an m-spec.
|
|
;; This assumes decls have been run through @code{stripdown}.
|
|
(define (udecl->mspec decl . rest)
|
|
|
|
(define (cnvt-array-size size-spec)
|
|
(simple-format #t "cnvt-array-size\n")
|
|
(with-output-to-string (lambda () (pretty-print-c99 size-spec))))
|
|
|
|
(define (unwrap-specl specl)
|
|
(let ((tspec (cadadr specl)))
|
|
;;(simple-format #t "tspec:\n") (pretty-print tspec)
|
|
(sxml-match tspec
|
|
((xxx-struct-def (field-list . ,rest))
|
|
`(struct-def ,@rest))
|
|
(,otherwise
|
|
tspec))))
|
|
|
|
(define (unwrap-declr declr)
|
|
(sxml-match declr
|
|
((ident ,name)
|
|
(list name))
|
|
((init-declr ,item)
|
|
(unwrap-declr item))
|
|
((comp-declr ,item)
|
|
(unwrap-declr item))
|
|
((ptr-declr (pointer . ,r) ,dir-declr)
|
|
(cons '(pointer-to) (unwrap-declr dir-declr)))
|
|
((array-of ,dir-declr ,size)
|
|
(cons `(array-of ,(cnvt-array-size size)) (unwrap-declr dir-declr)))
|
|
((ftn-declr ,dir-declr ,params)
|
|
(cons '(function-returning) (unwrap-declr dir-declr)))
|
|
((scope ,expr)
|
|
(unwrap-declr expr))
|
|
(,otherwise
|
|
(simple-format #t "unwrap-declr: OTHERWISE\n") (pretty-print otherwise)
|
|
;; failed got: (array-of (ident "foo")) FROM const char foo[];
|
|
#f)))
|
|
|
|
(define (find-type-spec decl-spec-list)
|
|
(let iter ((tsl (cdr decl-spec-list)))
|
|
(if (eqv? 'type-spec (caar tsl)) (car tsl)
|
|
(iter (cdr tsl)))))
|
|
|
|
(let* ((decl-dict (if (pair? rest) (car rest) '()))
|
|
(specl (sx-ref decl 1))
|
|
(declr (sx-ref decl 2))
|
|
(comm (sx-ref decl 3))
|
|
(m-specl (unwrap-specl specl))
|
|
(m-declr (unwrap-declr declr))
|
|
(m-decl (reverse (cons m-specl m-declr))))
|
|
m-decl))
|
|
|
|
(define* (udecl->mspec/comm decl #:optional (dict '()) #:key (def-comm ""))
|
|
(let* ((comm (sx-ref decl 3))
|
|
(spec (udecl->mspec decl dict)))
|
|
(cons* (car spec) (or comm `(comment ,def-comm)) (cdr spec))))
|
|
|
|
;; @deffn fix-fields flds => flds
|
|
;; This will take a list of fields from a struct and remove lone comments.
|
|
;; If a field following a lone comment has no code-comment, the lone comment
|
|
;; will be used. For example,
|
|
;; @example
|
|
;; /* foo */
|
|
;; int x;
|
|
;; @end example
|
|
;; @noindent
|
|
;; will be treated as if it was denereed
|
|
;; @example
|
|
;; int x; /* foo */
|
|
;; @end example
|
|
;; @noindent
|
|
(define (fix-fields flds)
|
|
(let iter ((rz '()) (cl '()) (fl flds))
|
|
;;(pretty-print fl)
|
|
(cond
|
|
((null? fl) (reverse rz))
|
|
((eqv? 'comment (caar fl))
|
|
(iter rz (cons (cadar fl) cl) (cdr fl)))
|
|
((eqv? 'comp-decl (caar fl))
|
|
(if (eq? 4 (length (car fl)))
|
|
(iter (cons (car fl) rz) '() (cdr fl)) ; has comment
|
|
(let* ((cs (apply string-append (reverse cl))) ; add comment
|
|
(fd (append (car fl) (list (list 'comment cs)))))
|
|
(iter (cons fd rz) '() (cdr fl)))))
|
|
(else
|
|
(error "bad field")))))
|
|
|
|
;; --- last line ---
|