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[diderot] Annotation of /branches/vis15/src/compiler/cxx-util/gen-load-nrrd.sml
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Annotation of /branches/vis15/src/compiler/cxx-util/gen-load-nrrd.sml

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Revision 3810 - (view) (download)
Original Path: branches/vis15/src/compiler/c-util/gen-load-nrrd.sml

1 : jhr 3810 (* gen-load-nrrd.sml
2 :     *
3 :     * This code is part of the Diderot Project (http://diderot-language.cs.uchicago.edu)
4 :     *
5 :     * COPYRIGHT (c) 2015 The University of Chicago
6 :     * All rights reserved.
7 :     *)
8 :    
9 :     structure GenLoadNrrd : sig
10 :    
11 :     (* loadImage (lhs, info, name)
12 :     * returns code to load an image from a Nrrd file, where "lhs" is the l-value to hold
13 :     * the image, "info" specifies information about the image format, and "name" specifies
14 :     * the file name. The generated code check the status of the load attempt and will
15 :     * return "true" (i.e., error) if the load fails.
16 :     *)
17 :     val loadImage : CLang.exp * ImageInfo.info * CLang.exp -> CLang.stm
18 :    
19 :     (* setImage (lhs, info, nrrd)
20 :     * returns code to initialize an image from a Nrrd, where "lhs" is the l-value to hold
21 :     * the image, "info" specifies information about the image format, and "nrrd" specifies
22 :     * the nrrd. The generated code check the status of the initialization and will
23 :     * return "true" (i.e., error) if the load fails.
24 :     *)
25 :     val setImage : CLang.exp * ImageInfo.info * CLang.exp -> CLang.stm
26 :    
27 :     val loadSeqFromFile : CLang.exp * APITypes.t * CLang.exp -> CLang.stm
28 :     val loadSeq : CLang.exp * APITypes.t * CLang.exp -> CLang.stm
29 :    
30 :     end = struct
31 :    
32 :     structure CL = CLang
33 :     structure RN = RuntimeNames
34 :     structure Ty = APITypes
35 :    
36 :     val wrldPrefixTy = CL.T_Ptr(CL.T_Named "WorldBase")
37 :    
38 :     fun doImage imageFn (lhs, info, arg) = let
39 :     val dim = ImageInfo.dim info
40 :     val loadExp = CL.mkApply(imageFn dim, [
41 :     CL.mkCast(wrldPrefixTy, CL.mkVar "wrld"),
42 :     arg,
43 :     CL.mkUnOp(CL.%&, lhs)
44 :     ])
45 :     in
46 :     (* FIXME: we should also generate code to check that the loaded image has the right type, etc. *)
47 :     CL.mkIfThen(loadExp, CL.mkReturn(SOME(CL.mkVar "true")))
48 :     end
49 :    
50 :     val loadImage = doImage RN.loadImage
51 :     val setImage = doImage RN.setImage
52 :    
53 :     fun doSeq loadFn (lhs, elemTy, arg) = let
54 :     val (nDims, dimInit, dimExp, elemTy) = (case elemTy
55 :     of Ty.TensorTy(dims as _::_) => let
56 :     val nDims = List.length dims
57 :     fun lp (_, [], init) = CL.I_Array(List.rev init)
58 :     | lp (i, d::dd, init) =
59 :     lp(i+1, dd, (i, CL.I_Exp(CL.mkInt(IntInf.fromInt d)))::init)
60 :     val dimInit = CL.mkDecl(
61 :     CL.T_Array(CL.T_Named "unsigned int", SOME nDims), "_dims",
62 :     SOME(lp(0, dims, [])))
63 :     in
64 :     (nDims, [dimInit], CL.mkVar "_dims", Ty.realTy)
65 :     end
66 :     | Ty.SeqTy ty' => raise Fail "loading sequences of type not supported yet"
67 :     | _ => (0, [], CL.mkInt 0, elemTy)
68 :     (* end case *))
69 :     in CL.mkBlock (
70 :     dimInit @ [
71 :     CL.mkAssign(
72 :     lhs,
73 :     CL.mkApply(loadFn elemTy, [
74 :     CL.mkCast(CL.T_Ptr(CL.T_Named "WorldBase"), CL.mkVar "wrld"),
75 :     arg,
76 :     CL.mkInt(IntInf.fromInt nDims),
77 :     dimExp
78 :     ])),
79 :     CL.mkIfThen(
80 :     CL.mkBinOp(lhs, CL.#==, CL.mkInt 0),
81 :     CL.mkReturn(SOME(CL.mkVar "true")))
82 :     ]
83 :     ) end
84 :    
85 :     val loadSeqFromFile = doSeq RN.loadDynSeqFromFile
86 :     val loadSeq = doSeq RN.loadDynSeq
87 :    
88 :     end

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