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
|
/*
* Copyright (C) Igor Sysoev
* Copyright (C) NGINX, Inc.
*/
#ifndef _NJS_TYPED_ARRAY_H_INCLUDED_
#define _NJS_TYPED_ARRAY_H_INCLUDED_
njs_typed_array_t *njs_typed_array_alloc(njs_vm_t *vm, njs_value_t *args,
njs_uint_t nargs, njs_bool_t zeroing, njs_object_type_t type);
njs_array_buffer_t *njs_typed_array_writable(njs_vm_t *vm,
njs_typed_array_t *array);
njs_int_t njs_typed_array_set_value(njs_vm_t *vm, njs_typed_array_t *array,
uint32_t index, njs_value_t *setval);
void njs_typed_array_to_chain(njs_vm_t *vm, njs_chb_t *chain,
njs_typed_array_t *array, njs_value_t *sep);
njs_int_t njs_typed_array_prototype_slice(njs_vm_t *vm, njs_value_t *args,
njs_uint_t nargs, njs_index_t copy, njs_value_t *retval);
njs_inline unsigned
njs_typed_array_element_size(njs_object_type_t type)
{
switch (type) {
case NJS_OBJ_TYPE_DATA_VIEW:
case NJS_OBJ_TYPE_UINT8_ARRAY:
case NJS_OBJ_TYPE_UINT8_CLAMPED_ARRAY:
case NJS_OBJ_TYPE_INT8_ARRAY:
return 1;
case NJS_OBJ_TYPE_UINT16_ARRAY:
case NJS_OBJ_TYPE_INT16_ARRAY:
return 2;
case NJS_OBJ_TYPE_UINT32_ARRAY:
case NJS_OBJ_TYPE_INT32_ARRAY:
case NJS_OBJ_TYPE_FLOAT32_ARRAY:
return 4;
default:
/* NJS_OBJ_TYPE_FLOAT64_ARRAY. */
return 8;
}
}
njs_inline uint32_t
njs_typed_array_length(const njs_typed_array_t *array)
{
return array->byte_length / njs_typed_array_element_size(array->type);
}
njs_inline uint32_t
njs_typed_array_offset(const njs_typed_array_t *array)
{
return array->offset * njs_typed_array_element_size(array->type);
}
njs_inline u_char *
njs_typed_array_start(const njs_typed_array_t *array)
{
return &array->buffer->u.u8[njs_typed_array_offset(array)];
}
njs_inline double
njs_typed_array_prop(const njs_typed_array_t *array, uint32_t index)
{
njs_array_buffer_t *buffer;
index += array->offset;
buffer = array->buffer;
switch (array->type) {
case NJS_OBJ_TYPE_UINT8_ARRAY:
case NJS_OBJ_TYPE_UINT8_CLAMPED_ARRAY:
return buffer->u.u8[index];
case NJS_OBJ_TYPE_INT8_ARRAY:
return buffer->u.i8[index];
case NJS_OBJ_TYPE_UINT16_ARRAY:
return buffer->u.u16[index];
case NJS_OBJ_TYPE_INT16_ARRAY:
return buffer->u.i16[index];
case NJS_OBJ_TYPE_UINT32_ARRAY:
return buffer->u.u32[index];
case NJS_OBJ_TYPE_INT32_ARRAY:
return buffer->u.i32[index];
case NJS_OBJ_TYPE_FLOAT32_ARRAY:
return buffer->u.f32[index];
default:
/* NJS_OBJ_TYPE_FLOAT64_ARRAY. */
return buffer->u.f64[index];
}
}
extern const njs_object_type_init_t njs_typed_array_type_init;
extern const njs_object_type_init_t njs_data_view_type_init;
extern const njs_object_type_init_t njs_typed_array_u8_type_init;
extern const njs_object_type_init_t njs_typed_array_u8clamped_type_init;
extern const njs_object_type_init_t njs_typed_array_i8_type_init;
extern const njs_object_type_init_t njs_typed_array_u16_type_init;
extern const njs_object_type_init_t njs_typed_array_i16_type_init;
extern const njs_object_type_init_t njs_typed_array_u32_type_init;
extern const njs_object_type_init_t njs_typed_array_i32_type_init;
extern const njs_object_type_init_t njs_typed_array_f32_type_init;
extern const njs_object_type_init_t njs_typed_array_f64_type_init;
#endif /* _NJS_TYPED_ARRAY_H_INCLUDED_ */
|
