Ints n

examples/gfcc/compiler/CleanJVM.hs

@@ -0,0 +1,30 @@
+module Main where
+
+import System
+
+main :: IO ()
+main = do
+  jvm:src:_ <- getArgs
+  s <- readFile jvm
+  let obj = takeWhile (/='.') src ++ ".j"
+  writeFile obj $ mkJVM s
+  putStrLn $ "wrote file " ++ obj
+
+mkJVM :: String -> String
+mkJVM = unlines . reverse . fst . foldl trans ([],([],0)) . lines where
+  trans (code,(env,v)) s = case words s of
+    ".method":f:ns -> ((".method " ++ f ++ concat ns):code,([],0))
+    "alloc":t:x:_  -> (code, ((x,v):env, v + size t))
+    ".limit":"locals":ns -> chCode (".limit locals " ++ show (length ns - 1))
+    t:"_load" :x:_ -> chCode (t ++ "load "  ++ look x) 
+    t:"_store":x:_ -> chCode (t ++ "store " ++ look x)
+    t:"_return":_  -> chCode (t ++ "return")
+    "goto":ns      -> chCode ("goto " ++ concat ns)
+    "ifzero":ns    -> chCode ("ifzero " ++ concat ns) 
+    _ ->   chCode s
+   where
+     chCode c = (c:code,(env,v))
+     look x = maybe (x ++ show env) show $ lookup x env
+     size t = case t of
+       "d" -> 2
+       _ -> 1

examples/gfcc/compiler/FILES

@@ -0,0 +1,39 @@
+GF sources:
+----------
+Imper.gf      -- abstract syntax of an imperative language
+ImperC.gf     -- concrete syntax for C notation
+ImperJVM.gf   -- concrete syntax for JVM notation
+ResImper.gf   -- resource module for concrete syntaxes
+
+Scripts:
+-------
+gfcc          -- the main compiler executable reading Foo.c ; shell script
+typecheck.gfs -- the type checker and constraint solver ; GF editor script
+CleanJVM.hs   -- cleans up jvm.tmp to produce Foo.j ; Haskell module
+makefile      -- builds the compiler from GF source ; Unix Make file
+
+Generated files:
+---------------
+Imper.gfcm    -- canonical multilingual GF grammar for C and JVM
+ImperC.cf     -- LBNF grammar for C generated from Imper.gfcm
+gft.tmp       -- parse result generated by the compiler front end
+jvm.tmp       -- pseudo-JVM produced by GF linearization
+
+Required programs to use the compiler:
+-------------------------------------
+gf+       -- Grammatical Framework version 2.0+, >= 23/9/2004
+jasmin    -- JVM assembler (to compile Foo.j to Foo.class)
+
+Required programs to build the compiler:
+---------------------------------------
+bnfc       -- BNF Converter version 2.1+,  >= 23/9/2004
+happy      -- parser generator for Haskell, >= 1.13 
+alex       -- lexer generator for Haskell, >= 2.0
+Profile.hs -- BNFC source file (formats/profile), must be on your path
+Trees.hs   -- BNFC source file (formats/profile), must be on your path
+
+File formats:
+------------
+Foo.c      -- C source file
+Foo.j      -- generated Jasmin JVM assembler file
+Foo.class  -- assembled JVM bytecode file

examples/gfcc/compiler/abs.c

@@ -0,0 +1,12 @@
+int abs (int x){
+  if (x < 0){
+    return 0 - x ;
+    }
+  else return x ;
+  } ;
+int main () {
+  int i ;
+  i = abs (16);
+  } ;
+
+

examples/gfcc/compiler/gfcc

@@ -0,0 +1,4 @@
+./TestImperC $1 | tail -1 >gft.tmp
+echo "es -file=typecheck.gfs" | gf+ -s Imper.gfcm
+runhugs CleanJVM jvm.tmp $1
+rm *.tmp

examples/gfcc/compiler/makefile

@@ -0,0 +1,12 @@
+GF=gf+
+SRC=../
+
+all: compiler
+
+compiler:
+	echo "pm | wf Imper.gfcm ;; pg -lang=ImperC -printer=lbnf | wf ImperC.tmp" | $(GF) $(SRC)ImperC.gf $(SRC)ImperJVM.gf
+	echo "entrypoints Program, Stm, Exp ;" >entry.tmp
+	cat entry.tmp ImperC.tmp >ImperC.cf
+	bnfc -m -prof ImperC.cf
+	make -f Makefile
+	rm *.tmp

examples/gfcc/compiler/typecheck.gfs

@@ -0,0 +1,8 @@
+n Program
+open gft.tmp
+'
+c solve
+'
+c reindex
+'
+save ImperJVM jvm.tmp