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[diderot] Annotation of /branches/vis12/src/compiler/c-util/gen-load-nrrd.sml
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Annotation of /branches/vis12/src/compiler/c-util/gen-load-nrrd.sml

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1 : jhr 2051 (* gen-load-nrrd.sml
2 :     *
3 :     * COPYRIGHT (c) 2012 The Diderot Project (http://diderot-language.cs.uchicago.edu)
4 :     * All rights reserved.
5 :     *)
6 :    
7 :     structure GenLoadNrrd : sig
8 :    
9 :     (* loadImage (lhs, info, name)
10 :     * returns code to load an image from a Nrrd file, where "lhs" is the l-value to hold
11 :     * the image, "info" specifies information about the image format, and "name" specifies
12 :     * the file name. The generated code check the status of the load attempt and will
13 :     * return "true" (i.e., error) if the load fails.
14 :     *)
15 :     val loadImage : CLang.exp * ImageInfo.info * CLang.exp -> CLang.stm
16 :    
17 :     (* setImage (lhs, info, nrrd)
18 :     * returns code to initialize an image from a Nrrd, where "lhs" is the l-value to hold
19 :     * the image, "info" specifies information about the image format, and "nrrd" specifies
20 :     * the nrrd. The generated code check the status of the initialization and will
21 :     * return "true" (i.e., error) if the load fails.
22 :     *)
23 :     val setImage : CLang.exp * ImageInfo.info * CLang.exp -> CLang.stm
24 :    
25 : jhr 2053 val loadSeqFromFile : CLang.exp * TreeIL.Ty.ty * CLang.exp -> CLang.stm
26 : jhr 2052 val loadSeq : CLang.exp * TreeIL.Ty.ty * CLang.exp -> CLang.stm
27 :    
28 : jhr 2051 end = struct
29 :    
30 :     structure CL = CLang
31 :     structure N = CNames
32 : jhr 2052 structure Ty = TreeIL.Ty
33 : jhr 2051
34 :     val wrldPrefixTy = CL.T_Ptr(CL.T_Named "WorldPrefix_t")
35 :    
36 :     fun doImage imageFn (lhs, info, arg) = let
37 :     val sts = "_sts"
38 :     val dim = ImageInfo.dim info
39 :     in CL.mkBlock [
40 :     CL.mkDecl(
41 :     CL.T_Named N.statusTy, sts,
42 :     SOME(CL.I_Exp(CL.E_Apply(imageFn dim, [
43 :     CL.mkCast(wrldPrefixTy, CL.mkVar "wrld"),
44 :     arg,
45 :     CL.mkUnOp(CL.%&, lhs)
46 :     ])))),
47 :     (* FIXME: we should also generate code to check that the loaded image has the right type, etc. *)
48 :     CL.mkIfThen(
49 :     CL.mkBinOp(CL.mkVar "DIDEROT_OK", CL.#!=, CL.mkVar sts),
50 :     CL.mkReturn(SOME(CL.mkVar "true")))
51 :     ] end
52 :    
53 :    
54 :     val loadImage = doImage N.loadImage
55 :     val setImage = doImage N.setImage
56 :    
57 : jhr 2053 fun doSeq loadFn (lhs, elemTy, arg) = let
58 : jhr 2052 val (nDims, dimInit, dimExp, elemTy) = (case elemTy
59 :     of Ty.TensorTy(dims as _::_) => let
60 :     val nDims = List.length dims
61 :     fun lp (_, [], init) = CL.I_Array(List.rev init)
62 :     | lp (i, d::dd, init) =
63 :     lp(i+1, dd, (i, CL.I_Exp(CL.mkInt(IntInf.fromInt d)))::init)
64 :     val dimInit = CL.mkDecl(
65 :     CL.T_Ptr(CL.T_Named "unsigned int"), "_dims",
66 :     SOME(lp(0, dims, [])))
67 :     in
68 :     (nDims, [dimInit], CL.mkVar "_dims", Ty.TensorTy[])
69 :     end
70 :     | Ty.SeqTy ty' => raise Fail "loading sequences of type not supported yet"
71 :     | _ => (0, [], CL.mkInt 0, elemTy)
72 :     (* end case *))
73 :     in CL.mkBlock (
74 :     dimInit @ [
75 :     CL.mkAssign(
76 :     lhs,
77 : jhr 2053 CL.E_Apply(loadFn elemTy, [
78 : jhr 2052 CL.mkCast(CL.T_Ptr(CL.T_Named "WorldPrefix_t"), CL.mkVar "wrld"),
79 : jhr 2053 arg,
80 : jhr 2052 CL.mkInt(IntInf.fromInt nDims),
81 :     dimExp
82 :     ])),
83 :     CL.mkIfThen(
84 :     CL.mkBinOp(lhs, CL.#==, CL.mkInt 0),
85 :     CL.mkReturn(SOME(CL.mkVar "true")))
86 :     ]
87 :     ) end
88 :    
89 : jhr 2053 val loadSeqFromFile = doSeq N.loadDynSeqFromFile
90 :     val loadSeq = doSeq N.loadDynSeq
91 :    
92 : jhr 2051 end

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