1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
|
import GFCC.Abs
import GFCC.ErrM
import GFCC.Lex
import GFCC.Par
import Control.Monad
import Data.Char
import Data.List
import Numeric
import System.Environment
import System.Exit
import System.IO
constrType :: Grammar -> String
constrType g = unlines $
["typedef enum { "]
++ map (\x -> " " ++ x ++ "," ) ds
++ ["} Fun;"]
where fs = [id2c n | (n,_) <- constructors g ]
ds = case fs of
[] -> []
(x:xs) -> (x ++ " = ATOM_FIRST_FUN"):xs
mkFunSigs :: Grammar -> String
mkFunSigs g = unlines [mkFunSig n ats | (n,(ats,_)) <- constructors g]
mkFunSig :: CId -> [CId] -> String
mkFunSig n ats =
"extern Tree *mk_" ++ id2c n ++ "(" ++ commaSep adecls ++ ");"
where
adecls = map ("Tree *" ++) args
args = [ "x" ++ show x | x <- [0..c-1] ]
c = length ats
mkFuns :: Grammar -> String
mkFuns g = unlines [mkFun n ats | (n,(ats,_)) <- constructors g]
mkFun :: CId -> [CId] -> String
mkFun n ats = unlines $
["extern Tree *mk_" ++ id2c n ++ "(" ++ commaSep adecls ++ ") {",
" Tree *t = tree_fun(" ++ id2c n ++ "," ++ show c ++ ");"]
++ [" tree_set_child(" ++ commaSep ["t",show i, args!!i] ++ ");" | i <- [0..c-1]]
++ [" return t;",
"}"]
where
adecls = map ("Tree *" ++) args
args = [ "x" ++ show x | x <- [0..c-1] ]
c = length ats
doDie :: String -> [String] -> [String]
doDie s args = ["fprintf(" ++ commaSep ("stderr":show s':args) ++ ");",
"exit(1);"]
where s' = "Error: " ++ s ++ "\n"
mkLin :: Grammar -> CId -> String
mkLin g l = unlines $
["extern Term *" ++ langLinName_ l ++ "(Tree *t) {",
" Term **cs = NULL;",
" int n = arity(t);",
" if (n > 0) {",
" int i;",
" cs = (Term**)term_alloc(n * sizeof(Term *));", -- FIXME: handle failure
" for (i = 0; i < n; i++) {",
" cs[i] = " ++ langLinName_ l ++ "(tree_get_child(t,i));",
" }",
" }",
"",
" switch (t->type) {",
" case ATOM_STRING: return term_str(t->value.string_value);",
-- " case ATOM_INTEGER: return NULL;", -- FIXME!
-- " case ATOM_DOUBLE: return NULL;", -- FIXME!
" case ATOM_META: return term_meta();"]
++ [" case " ++ id2c n ++ ": return " ++ linFunName n ++ "(cs);"
| (n,_) <- constructors g]
++ [" default: "]
++ map (" " ++) (doDie (langLinName_ l ++ " %d") ["t->type"])
++ [" return NULL;",
" }",
"}",
"",
"extern Term *" ++ langLinName l ++ "(Tree *t) {",
" Term *r;",
" term_alloc_pool(1000000);", -- FIXME: size?
" r = " ++ langLinName_ l ++ "(t);",
" /* term_free_pool(); */", -- FIXME: copy term?
" return r;",
"}"]
langLinName :: CId -> String
langLinName n = id2c n ++ "_lin"
langLinName_ :: CId -> String
langLinName_ n = id2c n ++ "_lin_"
linFunName :: CId -> String
linFunName n = "lin_" ++ id2c n
mkLinFuns :: [CncDef] -> String
mkLinFuns cs = unlines $ map mkLinFunSig cs ++ [""] ++ map mkLinFun cs
mkLinFunSig :: CncDef -> String
mkLinFunSig (Lin n t) =
"static Term *" ++ linFunName n ++ "(Term **cs);"
mkLinFun :: CncDef -> String
mkLinFun (Lin (CId n) t) | "__" `isPrefixOf` n = ""
mkLinFun (Lin n t) = unlines [
"static Term *" ++ linFunName n ++ "(Term **cs) {",
" return " ++ term2c t ++ ";",
"}"
]
term2c :: Tree a -> String
term2c t = case t of
-- terms
R terms -> fun "term_array" terms
-- an optimization of t!n where n is a constant int
P term0 (C n) -> "term_sel_int("++ term2c term0 ++ "," ++ show n ++ ")"
P term0 term1 -> "term_sel(" ++ term2c term0 ++ "," ++ term2c term1 ++ ")"
S terms -> fun "term_seq" terms
K tokn -> term2c tokn
V n -> "cs[" ++ show n ++ "]"
C n -> "term_int(" ++ show n ++ ")"
F cid -> linFunName cid ++ "(cs)"
FV terms -> fun "term_variants" terms
W str term -> "term_suffix(" ++ string2c str ++ "," ++ term2c term ++ ")"
RP term0 term1 -> "term_rp(" ++ term2c term0 ++ "," ++ term2c term1 ++ ")"
TM -> "term_meta()"
-- tokens
KS s -> "term_str(" ++ string2c s ++ ")"
KP strs vars -> error $ show t -- FIXME: pre token
_ -> error $ show t
where fun f ts = f ++ "(" ++ commaSep (show (length ts):map term2c ts) ++ ")"
commaSep = concat . intersperse ","
id2c :: CId -> String
id2c (CId s) = s -- FIXME: convert ticks
string2c :: String -> String
string2c s = "\"" ++ concatEsc (map esc s) ++ "\""
where
esc c | isAscii c && isPrint c = [c]
esc '\n' = "\\n"
esc c = "\\x" ++ map toUpper (showHex (ord c) "")
concatEsc [] = ""
concatEsc (x:xs) | length x <= 2 = x ++ concatEsc xs
| otherwise = x ++ "\" \"" ++ concatEsc xs
lang2file :: CId -> String -> String
lang2file n ext = id2c n ++ "." ++ ext
constructors :: Grammar -> [(CId, ([CId],CId))]
constructors (Grm _ (Abs ads) _) = [(n,(ats,rt)) | Fun n (Typ ats rt) _ <- ads]
absHFile :: Grammar -> FilePath
absHFile (Grm (Hdr a _) _ _) = lang2file a "h"
cncHFile :: Concrete -> FilePath
cncHFile (Cnc l _) = lang2file l "h"
mkAbsH :: Grammar -> String
mkAbsH g = unlines ["#include \"gfcc-tree.h\"",
"#include \"gfcc-term.h\"",
constrType g,
"",
mkFunSigs g]
mkAbsC :: Grammar -> String
mkAbsC g = unlines [include (absHFile g),
"",
mkFuns g]
mkCncH :: Grammar -> Concrete -> String
mkCncH g (Cnc l _) = unlines
[include (absHFile g),
"",
"extern Term *" ++ langLinName l ++ "(Tree *);"]
mkCncC :: Grammar -> Concrete -> String
mkCncC g c@(Cnc l cds) = unlines $
["#include <stdio.h>",
"#include <stdlib.h>",
include (cncHFile c),
""]
++ [mkLinFuns cds, mkLin g l]
mkH :: FilePath -> String -> (FilePath, String)
mkH f c = (f, c')
where c' = unlines ["#ifndef " ++ s, "#define " ++ s, "", c, "#endif"]
s = [if x=='.' then '_' else toUpper x | x <- f]
include :: FilePath -> String
include f = "#include " ++ show f
-- returns list of file name, file contents
gfcc2c :: Grammar -> [(FilePath, String)]
gfcc2c g@(Grm (Hdr a _) _ cs) =
[mkH (absHFile g) (mkAbsH g), (lang2file a "c", mkAbsC g)]
++ concat [[mkH (cncHFile cnc) (mkCncH g cnc),(lang2file c "c", mkCncC g cnc)] | cnc@(Cnc c _) <- cs]
parse :: String -> Err Grammar
parse = pGrammar . myLexer
die :: String -> IO ()
die s = do hPutStrLn stderr "Usage: gfcc2c <gfcc file>"
exitFailure
createFile :: FilePath -> String -> IO ()
createFile f c = do hPutStrLn stderr $ "Writing " ++ f ++ "..."
writeFile f c
main :: IO ()
main = do args <- getArgs
case args of
[file] -> do c <- readFile file
case parse c of
Bad err -> die err
Ok g -> do let fs = gfcc2c g
mapM_ (uncurry createFile) fs
_ -> die "Usage: gfcc2c <gfcc file>"
|
