/[escript]/trunk/escript/src/DataC.h
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Annotation of /trunk/escript/src/DataC.h

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Revision 82 - (hide annotations)
Tue Oct 26 06:53:54 2004 UTC (15 years, 1 month ago) by jgs
Original Path: trunk/esys2/escript/src/Data/DataC.h
File MIME type: text/plain
File size: 4285 byte(s)
Initial revision

1 jgs 82 /*
2     ******************************************************************************
3     * *
4     * COPYRIGHT ACcESS 2004 - All Rights Reserved *
5     * *
6     * This software is the property of ACcESS. No part of this code *
7     * may be copied in any form or by any means without the expressed written *
8     * consent of ACcESS. Copying, use or modification of this software *
9     * by any unauthorised person is illegal unless that person has a software *
10     * license agreement with ACcESS. *
11     * *
12     ******************************************************************************
13     */
14    
15     #if !defined escript_DataC_20040611_H
16     #define escript_DataC_20040611_H
17    
18     #define ESCRIPT_MAX_DATA_RANK 4
19     /**
20     \brief
21     Provide a wrapper around a Data object so Data may be accessed from C.
22    
23     Description:
24     Provide a wrapper around a Data object so Data may be accessed from C.
25    
26     */
27     struct escriptDataC {
28     void* m_dataPtr;
29     };
30    
31     typedef struct escriptDataC escriptDataC;
32    
33     /**
34     \brief
35     Return the function space type code.
36     \param data Input - C wrapper for Data.
37     */
38     int getFunctionSpaceType(escriptDataC* data);
39    
40     /**
41     \brief
42     sets the int variable _fs_ the function space type of _data_ if the data are not empty.
43     \param _fs_ Input/Output - variable to be updated.
44     \param _data_ Input - C wrapper for Data.
45     */
46     #define updateFunctionSpaceType(_fs_,_data_) _fs_=(isEmpty(_data_) ? _fs_ : getFunctionSpaceType(_data_))
47    
48     /**
49     \brief
50     is true if the function space type of _data_ is equal to _fs_ or is empty
51     \param _fs_ Input - function space type to checked against
52     \param _data_ Input - C wrapper for Data.
53     */
54     #define functionSpaceTypeEqual(_fs_,_data_) ( (_fs_==getFunctionSpaceType(_data_)) || isEmpty(_data_) ) ? 1 : 0
55    
56     /**
57     \brief
58     Returns the true if the data are empty or data is NULL.
59     \param data Input - C wrapper for Data.
60     */
61     int isEmpty(escriptDataC* data);
62    
63     /**
64     \brief
65     Return true if the input shape matches the data point shape for data
66     \param data Input - C wrapper for Data.
67     \param rank Input - number of dimensions.
68     \param dimensions Input -
69     */
70     int isDataPointShapeEqual(escriptDataC* data, int rank, int* dimensions);
71     /**
72     \brief
73     Return true if the number of data points per sample and the number
74     of samples equal the input values. In the case that data is empty or NULL,
75     true is returned.
76     \param data Input - C wrapper for Data.
77     \param noDataPointsPerSample Input - number of data points per sample
78     \param noSamples Input - number of samples
79     */
80     int numSamplesEqual(escriptDataC* data, int numDataPointsPerSample,
81     int numSamples);
82    
83     /**
84     \brief
85     Returns the rank of the point data for the data.
86     \param data Input - C wrapper for Data.
87     */
88     int getDataPointRank(escriptDataC* data);
89    
90     /**
91     \brief
92     Returns the pointer to the shape array of the point data.
93     \param data Input - C wrapper for Data.
94     */
95     int* getDataPointShape(escriptDataC* data);
96    
97     /**
98     \brief
99     Return the number of doubles needed for each data point.
100     \param data Input - C wrapper for Data.
101     */
102     int getDataPointSize(escriptDataC* data);
103     /**
104     \brief
105     Return the number of doubles stored for the Data object.
106     Argument data may be NULL, in which case 0 is returnd.
107     \param data Input - C wrapper for Data.
108     */
109     int getLength(escriptDataC* data);
110     /**
111     \brief
112     Return true if data is expanded.
113     Argument data may be NULL, in which case false is returnd.
114     \param data Input - C wrapper for Data.
115     */
116     int isExpanded(escriptDataC* data);
117     /**
118     \brief
119     Return a pointer to the data for the given sample number.
120     if data is empty NULL is returned.
121     data may be NULL, in which case NULL is returnd.
122     \param data Input - C wrapper for Data.
123     \param sampleNo Input - The sample number.
124     */
125     double* getSampleData(escriptDataC* data, int sampleNo);
126    
127     #endif

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