88 lines
3.3 KiB
Scheme
88 lines
3.3 KiB
Scheme
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;;; Mes --- Maxwell Equations of Software
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;;; Copyright © 2016,2017,2018 Jan (janneke) Nieuwenhuizen <janneke@gnu.org>
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;;;
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;;; This file is part of Mes.
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;;;
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;;; Mes is free software; you can redistribute it and/or modify it
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;;; 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 (at
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;;; your option) any later version.
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;;;
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;;; Mes is distributed in the hope that it will be useful, but
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;;; 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 Mes. If not, see <http://www.gnu.org/licenses/>.
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;;; Commentary:
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;;; Code:
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(define-module (mescc preprocess)
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#:use-module (ice-9 optargs)
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#:use-module (system base pmatch)
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#:use-module (srfi srfi-1)
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#:use-module (srfi srfi-26)
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#:use-module (nyacc lang c99 parser)
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#:use-module (mes guile)
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#:export (c99-input->ast))
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(define (logf port string . rest)
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(apply format (cons* port string rest))
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(force-output port)
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#t)
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(define (stderr string . rest)
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(apply logf (cons* (current-error-port) string rest)))
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(define mes? (pair? (current-module)))
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(define* (c99-input->full-ast #:key (prefix "") (defines '()) (includes '()))
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(let ((sys-include (if (equal? prefix "") "include" (string-append prefix "/share/include"))))
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(parse-c99
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#:inc-dirs (append includes (cons* sys-include "include" "lib" (or (and=> (getenv "C_INCLUDE_PATH") (cut string-split <> #\:)) '())))
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#:cpp-defs `(
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"NULL=0"
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"__linux__=1"
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"__i386__=1"
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"POSIX=0"
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"_POSIX_SOURCE=0"
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"__MESC__=1"
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,(if mes? "__MESC_MES__=1" "__MESC_MES__=0")
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,@defines)
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#:mode 'code)))
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(define* (c99-input->ast #:key (prefix "") (defines '()) (includes '()))
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(stderr "parsing: input\n")
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((compose ast-strip-const ast-strip-comment) (c99-input->full-ast #:prefix prefix #:defines defines #:includes includes)))
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(define (ast-strip-comment o)
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(pmatch o
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((comment . ,comment) #f)
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(((comment . ,comment) . ,t) (filter-map ast-strip-comment t))
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(((comment . ,comment) . ,cdr) cdr)
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((,car . (comment . ,comment)) car)
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((,h . ,t) (if (list? o) (filter-map ast-strip-comment o)
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(cons (ast-strip-comment h) (ast-strip-comment t))))
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(_ o)))
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(define (ast-strip-const o)
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(pmatch o
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((type-qual ,qual) (if (equal? qual "const") #f o))
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((pointer (type-qual-list (type-qual ,qual)) . ,rest)
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(if (equal? qual "const") `(pointer ,@rest) o))
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((decl-spec-list (type-qual ,qual))
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(if (equal? qual "const") #f
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`(decl-spec-list (type-qual ,qual))))
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((decl-spec-list (type-qual ,qual) . ,rest)
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(if (equal? qual "const") `(decl-spec-list ,@rest)
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`(decl-spec-list (type-qual ,qual) ,@(map ast-strip-const rest))))
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((decl-spec-list (type-qual-list (type-qual ,qual)) . ,rest)
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(if (equal? qual "const") `(decl-spec-list ,@rest)
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`(decl-spec-list (type-qual-list (type-qual ,qual)) ,@(map ast-strip-const rest))))
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((,h . ,t) (if (list? o) (filter-map ast-strip-const o)
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(cons (ast-strip-const h) (ast-strip-const t))))
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(_ o)))
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