summaryrefslogtreecommitdiffstats
path: root/src/H5Spkg.h
blob: f5511fbf691879451a7d40bd7bafaa05e9207c16 (plain)
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
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
 * Copyright by The HDF Group.                                               *
 * Copyright by the Board of Trustees of the University of Illinois.         *
 * All rights reserved.                                                      *
 *                                                                           *
 * This file is part of HDF5.  The full HDF5 copyright notice, including     *
 * terms governing use, modification, and redistribution, is contained in    *
 * the files COPYING and Copyright.html.  COPYING can be found at the root   *
 * of the source code distribution tree; Copyright.html can be found at the  *
 * root level of an installed copy of the electronic HDF5 document set and   *
 * is linked from the top-level documents page.  It can also be found at     *
 * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
 * access to either file, you may request a copy from help@hdfgroup.org.     *
 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */

/*
 * Programmer:	Quincey Koziol <koziol@ncsa.uiuc.edu>
 *		Thursday, September 28, 2000
 *
 * Purpose:	This file contains declarations which are visible only within
 *		the H5S package.  Source files outside the H5S package should
 *		include H5Sprivate.h instead.
 */
#ifndef H5S_PACKAGE
#error "Do not include this file outside the H5S package!"
#endif

#ifndef _H5Spkg_H
#define _H5Spkg_H

#include "H5Sprivate.h"

/* Flags to indicate special dataspace features are active */
#define H5S_VALID_MAX	0x01
#define H5S_VALID_PERM	0x02


/* Initial version of the dataspace information */
#define H5O_SDSPACE_VERSION_1	1

/* This version adds support for "null" dataspaces, encodes the type of the
 *      dataspace in the message and eliminated the rest of the "reserved"
 *      bytes.
 */
#define H5O_SDSPACE_VERSION_2	2

/* The latest version of the format.  Look through the 'encode'
 *      and 'size' callbacks for places to change when updating this. */
#define H5O_SDSPACE_VERSION_LATEST H5O_SDSPACE_VERSION_2


/*
 * Dataspace extent information
 */
/* Extent container */
struct H5S_extent_t {
    H5O_shared_t sh_loc;        /* Shared message info (must be first) */

    H5S_class_t	type;           /* Type of extent */
    unsigned version;           /* Version of object header message to encode this object with */
    hsize_t nelem;              /* Number of elements in extent */

    unsigned rank;              /* Number of dimensions */
    hsize_t *size;              /* Current size of the dimensions */
    hsize_t *max;               /* Maximum size of the dimensions */
};

/*
 * Dataspace selection information
 */
/* Node in point selection list (typedef'd in H5Sprivate.h) */
struct H5S_pnt_node_t {
    hsize_t *pnt;          /* Pointer to a selected point */
    struct H5S_pnt_node_t *next;  /* pointer to next point in list */
};

/* Information about point selection list */
typedef struct {
    H5S_pnt_node_t *head;   /* Pointer to head of point list */
} H5S_pnt_list_t;

/* Information about new-style hyperslab spans */

/* Information a particular hyperslab span */
struct H5S_hyper_span_t {
    hsize_t low, high;          /* Low & high bounds of span */
    hsize_t nelem;              /* Number of elements in span (only needed during I/O) */
    hsize_t pstride;            /* Pseudo-stride from start of previous span (only used during I/O) */
    struct H5S_hyper_span_info_t *down;     /* Pointer to list of spans in next dimension down */
    struct H5S_hyper_span_t *next;     /* Pointer to next span in list */
};

/* Information about a list of hyperslab spans */
struct H5S_hyper_span_info_t {
    unsigned count;                    /* Ref. count of number of spans which share this span */
    struct H5S_hyper_span_info_t *scratch;  /* Scratch pointer
                                             * (used during copies, as mark
                                             * during precomputes for I/O &
                                             * to point to the last span in a
                                             * list during single element adds)
                                             */
    struct H5S_hyper_span_t *head;  /* Pointer to list of spans in next dimension down */
};

/* Information about new-style hyperslab selection */
typedef struct {
    hbool_t diminfo_valid;                      /* Whether the dataset has valid diminfo */
    H5S_hyper_dim_t opt_diminfo[H5S_MAX_RANK];  /* per-dim selection info */
    H5S_hyper_dim_t app_diminfo[H5S_MAX_RANK];  /* per-dim selection info */
	/* 'opt_diminfo' points to a [potentially] optimized version of the user's
         * hyperslab information.  'app_diminfo' points to the actual parameters
         * that the application used for setting the hyperslab selection.  These
         * are only used for re-gurgitating the original values used to set the
         * hyperslab to the application when it queries the hyperslab selection
         * information. */
    H5S_hyper_span_info_t *span_lst; /* List of hyperslab span information */
} H5S_hyper_sel_t;

/* Selection information methods */
/* Method to copy a selection */
typedef herr_t (*H5S_sel_copy_func_t)(H5S_t *dst, const H5S_t *src, hbool_t share_selection);
/* Method to retrieve a list of offset/length sequences for selection */
typedef herr_t (*H5S_sel_get_seq_list_func_t)(const H5S_t *space, unsigned flags,
    H5S_sel_iter_t *iter, size_t maxseq, size_t maxbytes,
    size_t *nseq, size_t *nbytes, hsize_t *off, size_t *len);
/* Method to release current selection */
typedef herr_t (*H5S_sel_release_func_t)(H5S_t *space);
/* Method to determine if current selection is valid for dataspace */
typedef htri_t (*H5S_sel_is_valid_func_t)(const H5S_t *space);
/* Method to determine number of bytes required to store current selection */
typedef hssize_t (*H5S_sel_serial_size_func_t)(const H5S_t *space);
/* Method to store current selection in "serialized" form (a byte sequence suitable for storing on disk) */
typedef herr_t (*H5S_sel_serialize_func_t)(const H5S_t *space, uint8_t **p);
/* Method to store create selection from "serialized" form (a byte sequence suitable for storing on disk) */
typedef herr_t (*H5S_sel_deserialize_func_t)(H5S_t *space, const uint8_t **p);
/* Method to determine smallest n-D bounding box containing the current selection */
typedef herr_t (*H5S_sel_bounds_func_t)(const H5S_t *space, hsize_t *start, hsize_t *end);
/* Method to determine linear offset of initial element in selection within dataspace */
typedef herr_t (*H5S_sel_offset_func_t)(const H5S_t *space, hsize_t *offset);
/* Method to determine if current selection is contiguous */
typedef htri_t (*H5S_sel_is_contiguous_func_t)(const H5S_t *space);
/* Method to determine if current selection is a single block */
typedef htri_t (*H5S_sel_is_single_func_t)(const H5S_t *space);
/* Method to determine if current selection is "regular" */
typedef htri_t (*H5S_sel_is_regular_func_t)(const H5S_t *space);
/* Method to adjust a selection by an offset */
typedef herr_t (*H5S_sel_adjust_u_func_t)(H5S_t *space, const hsize_t *offset);
/* Method to construct single element projection onto scalar dataspace */
typedef herr_t (*H5S_sel_project_scalar)(const H5S_t *space, hsize_t *offset);
/* Method to construct selection projection onto/into simple dataspace */
typedef herr_t (*H5S_sel_project_simple)(const H5S_t *space, H5S_t *new_space, hsize_t *offset);
/* Method to initialize iterator for current selection */
typedef herr_t (*H5S_sel_iter_init_func_t)(H5S_sel_iter_t *sel_iter, const H5S_t *space);

/* Selection class information */
typedef struct {
    H5S_sel_type type;                          /* Type of selection (all, none, points or hyperslab) */

    /* Methods */
    H5S_sel_copy_func_t copy;                   /* Method to make a copy of a selection */
    H5S_sel_get_seq_list_func_t get_seq_list;   /* Method to retrieve a list of offset/length sequences for selection */
    H5S_sel_release_func_t release;             /* Method to release current selection */
    H5S_sel_is_valid_func_t is_valid;           /* Method to determine if current selection is valid for dataspace */
    H5S_sel_serial_size_func_t serial_size;     /* Method to determine number of bytes required to store current selection */
    H5S_sel_serialize_func_t serialize;         /* Method to store current selection in "serialized" form (a byte sequence suitable for storing on disk) */
    H5S_sel_deserialize_func_t deserialize;     /* Method to store create selection from "serialized" form (a byte sequence suitable for storing on disk) */
    H5S_sel_bounds_func_t bounds;               /* Method to determine to smallest n-D bounding box containing the current selection */
    H5S_sel_offset_func_t offset;               /* Method to determine linear offset of initial element in selection within dataspace */
    H5S_sel_is_contiguous_func_t is_contiguous; /* Method to determine if current selection is contiguous */
    H5S_sel_is_single_func_t is_single;         /* Method to determine if current selection is a single block */
    H5S_sel_is_regular_func_t is_regular;       /* Method to determine if current selection is "regular" */
    H5S_sel_adjust_u_func_t adjust_u;           /* Method to adjust a selection by an offset */
    H5S_sel_project_scalar project_scalar;      /* Method to construct scalar dataspace projection */
    H5S_sel_project_simple project_simple;      /* Method to construct simple dataspace projection */
    H5S_sel_iter_init_func_t iter_init;         /* Method to initialize iterator for current selection */
} H5S_select_class_t;

/* Selection information object */
typedef struct {
    const H5S_select_class_t *type;     /* Pointer to selection's class info */
    hbool_t offset_changed;             /* Indicate that the offset for the selection has been changed */
    hssize_t offset[H5S_MAX_RANK];      /* Offset within the extent */
    hsize_t num_elem;   /* Number of elements in selection */
    union {
        H5S_pnt_list_t *pnt_lst; /* List of selected points (order is important) */
        H5S_hyper_sel_t *hslab;  /* Info about hyperslab selections */
    } sel_info;
} H5S_select_t;

/* Main dataspace structure (typedef'd in H5Sprivate.h) */
struct H5S_t {
    H5S_extent_t extent;                /* Dataspace extent (must stay first) */
    H5S_select_t select;		/* Dataspace selection */
};

/* Selection iteration methods */
/* Method to retrieve the current coordinates of iterator for current selection */
typedef herr_t (*H5S_sel_iter_coords_func_t)(const H5S_sel_iter_t *iter, hsize_t *coords);
/* Method to retrieve the current block of iterator for current selection */
typedef herr_t (*H5S_sel_iter_block_func_t)(const H5S_sel_iter_t *iter, hsize_t *start, hsize_t *end);
/* Method to determine number of elements left in iterator for current selection */
typedef hsize_t (*H5S_sel_iter_nelmts_func_t)(const H5S_sel_iter_t *iter);
/* Method to determine if there are more blocks left in the current selection */
typedef htri_t (*H5S_sel_iter_has_next_block_func_t)(const H5S_sel_iter_t *iter);
/* Method to move selection iterator to the next element in the selection */
typedef herr_t (*H5S_sel_iter_next_func_t)(H5S_sel_iter_t *iter, size_t nelem);
/* Method to move selection iterator to the next block in the selection */
typedef herr_t (*H5S_sel_iter_next_block_func_t)(H5S_sel_iter_t *iter);
/* Method to release iterator for current selection */
typedef herr_t (*H5S_sel_iter_release_func_t)(H5S_sel_iter_t *iter);

/* Selection iteration class */
typedef struct H5S_sel_iter_class_t {
    H5S_sel_type type;                          /* Type of selection (all, none, points or hyperslab) */

    /* Methods on selections */
    H5S_sel_iter_coords_func_t iter_coords;     /* Method to retrieve the current coordinates of iterator for current selection */
    H5S_sel_iter_block_func_t iter_block;       /* Method to retrieve the current block of iterator for current selection */
    H5S_sel_iter_nelmts_func_t iter_nelmts;     /* Method to determine number of elements left in iterator for current selection */
    H5S_sel_iter_has_next_block_func_t iter_has_next_block;         /* Method to query if there is another block left in the selection */
    H5S_sel_iter_next_func_t iter_next;         /* Method to move selection iterator to the next element in the selection */
    H5S_sel_iter_next_block_func_t iter_next_block;     /* Method to move selection iterator to the next block in the selection */
    H5S_sel_iter_release_func_t iter_release;   /* Method to release iterator for current selection */
} H5S_sel_iter_class_t;

/*
 * All selection class methods.
 */
H5_DLLVAR const H5S_select_class_t H5S_sel_all[1];

/*
 * Hyperslab selection class methods.
 */
H5_DLLVAR const H5S_select_class_t H5S_sel_hyper[1];

/*
 * None selection class methods.
 */
H5_DLLVAR const H5S_select_class_t H5S_sel_none[1];

/*
 * Pointer selection class methods.
 */
H5_DLLVAR const H5S_select_class_t H5S_sel_point[1];

/* Extent functions */
H5_DLL herr_t H5S_extent_release(H5S_extent_t *extent);
H5_DLL herr_t H5S_extent_copy_real(H5S_extent_t *dst, const H5S_extent_t *src,
    hbool_t copy_max);

/* Operations on selections */

/* Testing functions */
#ifdef H5S_TESTING
H5_DLL htri_t H5S_select_shape_same_test(hid_t sid1, hid_t sid2);
H5_DLL htri_t H5S_get_rebuild_status_test(hid_t space_id);
#endif /* H5S_TESTING */

#endif /*_H5Spkg_H*/