src/gallium/state_trackers/vega/util_array.h

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   3  * Copyright 2009 VMware, Inc.  All Rights Reserved.
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  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
  34 struct array {
  35    VGint          datatype_size;
  36    void          *data;
  37    VGint          size;
  38    VGint          num_elements;
  39 };
  40
  41 static 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
  53 static 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
  64 static INLINE void array_destroy(struct array *array)
  65 {
  66    if (array)
  67       free(array->data);
  68    FREE(array);
  69 }
  70
  71 static 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
  83 static 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
  97 static 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
 107 static 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
 117 static INLINE void array_reset(struct array *array)
 118 {
 119    array->num_elements = 0;
 120 }
 121
 122 #endif