1/**************************************************************************
2 *
3 * Copyright 2009 VMware, Inc.  All Rights Reserved.
4 *
5 * Permission is hereby granted, free of charge, to any person obtaining a
6 * copy of this software and associated documentation files (the
7 * "Software"), to deal in the Software without restriction, including
8 * without limitation the rights to use, copy, modify, merge, publish,
9 * distribute, sub license, and/or sell copies of the Software, and to
10 * permit persons to whom the Software is furnished to do so, subject to
11 * the following conditions:
12 *
13 * The above copyright notice and this permission notice (including the
14 * next paragraph) shall be included in all copies or substantial portions
15 * of the Software.
16 *
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
18 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
19 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
20 * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
21 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
22 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
23 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
24 *
25 **************************************************************************/
26
27#ifndef UTIL_ARRAY_H
28#define UTIL_ARRAY_H
29
30#include "util/u_memory.h"
31
32#define DEFAULT_ARRAY_SIZE 256
33
34struct array {
35   VGint          datatype_size;
36   void          *data;
37   VGint          size;
38   VGint          num_elements;
39};
40
41static INLINE struct array *array_create(VGint datatype_size)
42{
43   struct array *array = CALLOC_STRUCT(array);
44   array->datatype_size = datatype_size;
45
46   array->size = DEFAULT_ARRAY_SIZE;
47   array->data = malloc(array->size * array->datatype_size);
48
49   return array;
50}
51
52
53static INLINE struct array *array_create_size(VGint datatype_size, VGint size)
54{
55   struct array *array = CALLOC_STRUCT(array);
56   array->datatype_size = datatype_size;
57
58   array->size = size;
59   array->data = malloc(array->size * array->datatype_size);
60
61   return array;
62}
63
64static INLINE void array_destroy(struct array *array)
65{
66   if (array)
67      free(array->data);
68   FREE(array);
69}
70
71static INLINE void array_resize(struct array *array, int num)
72{
73   VGint size = array->datatype_size * num;
74   void *data = malloc(size);
75   memcpy(data, array->data, array->size * array->datatype_size);
76   free(array->data);
77   array->data = data;
78   array->size = num;
79   array->num_elements = (array->num_elements > num) ? num :
80                         array->num_elements;
81}
82
83static INLINE void array_append_data(struct array *array,
84                              const void *data, int num_elements)
85{
86   VGbyte *adata;
87
88   while (array->num_elements + num_elements > array->size) {
89      array_resize(array, (array->num_elements + num_elements) * 1.5);
90   }
91   adata = (VGbyte *)array->data;
92   memcpy(adata + (array->num_elements * array->datatype_size), data,
93          num_elements * array->datatype_size);
94   array->num_elements += num_elements;
95}
96
97static INLINE void array_change_data(struct array *array,
98                              const void *data,
99                              int start_idx,
100                              int num_elements)
101{
102   VGbyte *adata = (VGbyte *)array->data;
103   memcpy(adata + (start_idx * array->datatype_size), data,
104          num_elements * array->datatype_size);
105}
106
107static INLINE void array_remove_element(struct array *array,
108                                        int idx)
109{
110   VGbyte *adata = (VGbyte *)array->data;
111   memmove(adata + (idx * array->datatype_size),
112           adata + ((idx + 1) * array->datatype_size),
113           (array->num_elements - idx - 1) * array->datatype_size);
114   --array->num_elements;
115}
116
117static INLINE void array_reset(struct array *array)
118{
119   array->num_elements = 0;
120}
121
122#endif
123