/
C.hs
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/
C.hs
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{-# LANGUAGE NoImplicitPrelude #-}
{-
BNF Converter: C Main file
Copyright (C) 2004 Author: Michael Pellauer
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335, USA
-}
module BNFC.Backend.C (makeC) where
import Prelude'
import BNFC.Utils
import BNFC.CF
import BNFC.Options
import BNFC.Backend.Base
import BNFC.Backend.C.CFtoCAbs
import BNFC.Backend.C.CFtoFlexC
import BNFC.Backend.C.CFtoBisonC
import BNFC.Backend.C.CFtoCSkel
import BNFC.Backend.C.CFtoCPrinter
import BNFC.PrettyPrint
import qualified BNFC.Backend.Common.Makefile as Makefile
makeC :: SharedOptions -> CF -> MkFiles ()
makeC opts cf = do
let (hfile, cfile) = cf2CAbs (linenumbers opts) prefix cf
mkfile "Absyn.h" hfile
mkfile "Absyn.c" cfile
let (flex, env) = cf2flex prefix cf
mkfile (name ++ ".l") flex
let bison = cf2Bison (linenumbers opts) prefix cf env
mkfile (name ++ ".y") bison
let header = mkHeaderFile (linenumbers opts) cf env
mkfile "Parser.h" header
let (skelH, skelC) = cf2CSkel cf
mkfile "Skeleton.h" skelH
mkfile "Skeleton.c" skelC
let (prinH, prinC) = cf2CPrinter cf
mkfile "Printer.h" prinH
mkfile "Printer.c" prinC
mkfile "Test.c" (ctest cf)
Makefile.mkMakefile opts (makefile name prefix)
where prefix :: String -- The prefix is a string used by flex and bison
-- that is prepended to generated function names.
-- In most cases we want the grammar name as the prefix
-- but in a few specific cases, this can create clashes
-- with existing functions
prefix = if name `elem` ["m","c","re","std","str"]
then name ++ "_" else name
name = lang opts
makefile :: String -> String -> String -> Doc
makefile name prefix basename = vcat
[ "CC = gcc"
, "CCFLAGS = -g -W -Wall -Wno-unused-parameter -Wno-unused-function -Wno-unneeded-internal-declaration"
, ""
, "FLEX = flex"
, "FLEX_OPTS = -P" <> text prefix
, ""
, "BISON = bison"
, "BISON_OPTS = -t -p" <> text prefix
, ""
, "OBJS = Absyn.o Lexer.o Parser.o Printer.o"
, ""
, Makefile.mkRule ".PHONY" ["clean", "distclean"]
[]
, Makefile.mkRule "all" [testName]
[]
, Makefile.mkRule "clean" []
-- peteg: don't nuke what we generated - move that to the "vclean" target.
[ "rm -f *.o " ++ testName ++ " " ++ unwords
[ name ++ e | e <- [".aux", ".log", ".pdf",".dvi", ".ps", ""]] ]
, Makefile.mkRule "distclean" ["clean"]
[ "rm -f " ++ unwords
[ "Absyn.h", "Absyn.c", "Test.c", "Parser.c", "Parser.h", "Lexer.c",
"Skeleton.c", "Skeleton.h", "Printer.c", "Printer.h", basename,
name ++ ".l", name ++ ".y", name ++ ".tex"
]
]
, Makefile.mkRule testName ["${OBJS}", "Test.o"]
[ "@echo \"Linking " ++ testName ++ "...\""
, "${CC} ${CCFLAGS} ${OBJS} Test.o -o " ++ testName ]
, Makefile.mkRule "Absyn.o" [ "Absyn.c", "Absyn.h"]
[ "${CC} ${CCFLAGS} -c Absyn.c" ]
, Makefile.mkRule "Lexer.c" [ name ++ ".l" ]
[ "${FLEX} ${FLEX_OPTS} -oLexer.c " ++ name ++ ".l" ]
, Makefile.mkRule "Parser.c" [ name ++ ".y" ]
[ "${BISON} ${BISON_OPTS} " ++ name ++ ".y -o Parser.c" ]
, Makefile.mkRule "Lexer.o" [ "Lexer.c", "Parser.h" ]
[ "${CC} ${CCFLAGS} -c Lexer.c " ]
, Makefile.mkRule "Parser.o" ["Parser.c", "Absyn.h" ]
[ "${CC} ${CCFLAGS} -c Parser.c" ]
, Makefile.mkRule "Printer.o" [ "Printer.c", "Printer.h", "Absyn.h" ]
[ "${CC} ${CCFLAGS} -c Printer.c" ]
, Makefile.mkRule "Test.o" [ "Test.c", "Parser.h", "Printer.h", "Absyn.h" ]
[ "${CC} ${CCFLAGS} -c Test.c" ]
]
where testName = "Test" ++ name
-- | Generate a test program that parses stdin and prints the AST and it's
-- linearization
ctest :: CF -> String
ctest cf =
unlines
[
"/*** Compiler Front-End Test automatically generated by the BNF Converter ***/",
"/* */",
"/* This test will parse a file, print the abstract syntax tree, and then */",
"/* pretty-print the result. */",
"/* */",
"/****************************************************************************/",
"",
"#include <stdio.h>",
"#include <stdlib.h>",
"#include <string.h>",
"",
"#include \"Parser.h\"",
"#include \"Printer.h\"",
"#include \"Absyn.h\"",
"",
"void usage(void) {",
" printf(\"usage: Call with one of the following argument " ++
"combinations:\\n\");",
" printf(\"\\t--help\\t\\tDisplay this help message.\\n\");",
" printf(\"\\t(no arguments)\tParse stdin verbosely.\\n\");",
" printf(\"\\t(files)\\t\\tParse content of files verbosely.\\n\");",
" printf(\"\\t-s (files)\\tSilent mode. Parse content of files " ++
"silently.\\n\");",
"}",
"",
"int main(int argc, char ** argv)",
"{",
" FILE *input;",
" " ++ dat ++ " parse_tree;",
" int quiet = 0;",
" char *filename = NULL;",
"",
" if (argc > 1) {",
" if (strcmp(argv[1], \"-s\") == 0) {",
" quiet = 1;",
" if (argc > 2) {",
" filename = argv[2];",
" } else {",
" input = stdin;",
" }",
" } else {",
" filename = argv[1];",
" }",
" }",
"",
" if (filename) {",
" input = fopen(filename, \"r\");",
" if (!input) {",
" usage();",
" exit(1);",
" }",
" }",
" else input = stdin;",
" /* The default entry point is used. For other options see Parser.h */",
" parse_tree = p" ++ def ++ "(input);",
" if (parse_tree)",
" {",
" printf(\"\\nParse Successful!\\n\");",
" if (!quiet) {",
" printf(\"\\n[Abstract Syntax]\\n\");",
" printf(\"%s\\n\\n\", show" ++ dat ++ "(parse_tree));",
" printf(\"[Linearized Tree]\\n\");",
" printf(\"%s\\n\\n\", print" ++ dat ++ "(parse_tree));",
" }",
" return 0;",
" }",
" return 1;",
"}",
""
]
where
cat :: Cat
cat = head $ allEntryPoints cf
def :: String
def = identCat cat
dat :: String
dat = identCat . normCat $ cat
mkHeaderFile :: RecordPositions -> CF -> [(a, String)] -> String
mkHeaderFile _ cf env = unlines $ concat
[ [ "#ifndef PARSER_HEADER_FILE"
, "#define PARSER_HEADER_FILE"
, ""
, "#include \"Absyn.h\""
, ""
, "typedef union"
, "{"
]
, map (" " ++) unionBuiltinTokens
, concatMap mkPointer $ allParserCatsNorm cf
, [ "} YYSTYPE;"
, ""
-- https://www.gnu.org/software/bison/manual/html_node/Location-Type.html#Location-Type
, "typedef struct YYLTYPE"
, "{"
, " int first_line;"
, " int first_column;"
, " int last_line;"
, " int last_column;"
, "} YYLTYPE;"
, ""
, "#define _ERROR_ 258"
, mkDefines (259::Int) env
, ""
, "extern YYLTYPE yylloc;"
, "extern YYSTYPE yylval;"
, ""
]
, concatMap mkFunc $ allEntryPoints cf
, [ ""
, "#endif"
]
]
where
mkDefines n [] = mkString n
mkDefines n ((_,s):ss) = ("#define " ++ s +++ (show n) ++ "\n") ++ (mkDefines (n+1) ss)
mkString n = if isUsedCat cf (TokenCat catString)
then ("#define _STRING_ " ++ show n ++ "\n") ++ mkChar (n+1)
else mkChar n
mkChar n = if isUsedCat cf (TokenCat catChar)
then ("#define _CHAR_ " ++ show n ++ "\n") ++ mkInteger (n+1)
else mkInteger n
mkInteger n = if isUsedCat cf (TokenCat catInteger)
then ("#define _INTEGER_ " ++ show n ++ "\n") ++ mkDouble (n+1)
else mkDouble n
mkDouble n = if isUsedCat cf (TokenCat catDouble)
then ("#define _DOUBLE_ " ++ show n ++ "\n") ++ mkIdent(n+1)
else mkIdent n
mkIdent n = if isUsedCat cf (TokenCat catIdent)
then ("#define _IDENT_ " ++ show n ++ "\n")
else ""
-- Andreas, 2019-04-29, issue #210: generate parsers also for coercions
mkFunc c =
[ identCat (normCat c) ++ " p" ++ identCat c ++ "(FILE *inp);"
, identCat (normCat c) ++ " ps" ++ identCat c ++ "(const char *str);"
]