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
|
/*
* Copyright 2022-2023 Frederico de Oliveira Linhares
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "binary_reader.hpp"
#include <fstream>
namespace
{
union IntAndFloat32bit{
uint32_t i;
float f;
};
union IntAndFloat64bit{
uint64_t i;
double f;
};
}
BinaryReader::BinaryReader(std::string file_path):
_pointer{0}
{
std::ifstream file(file_path, std::ios::binary | std::ios::ate);
if(!file.is_open())
{
std::string error{"failed to open file: "};
error += file_path;
throw std::runtime_error{error};
}
this->_size = file.tellg();
file.seekg(0);
this->data = new uint8_t[this->_size];
file.read((char*)data, this->_size);
}
BinaryReader::BinaryReader(const char *file_path):
BinaryReader{std::string(file_path)}
{
}
BinaryReader::~BinaryReader()
{
delete[] this->data;
}
uint8_t
BinaryReader::read_ui8()
{
return this->data[this->_pointer++];
}
uint32_t
BinaryReader::read_ui32()
{
uint8_t b1{this->data[_pointer++]}, b2{this->data[_pointer++]},
b3{this->data[_pointer++]}, b4{this->data[_pointer++]};
return b1 << 24 | b2 << 16 | b3 << 8 | b4;
}
uint64_t
BinaryReader::read_ui64()
{
uint8_t b1{this->data[_pointer++]}, b2{this->data[_pointer++]},
b3{this->data[_pointer++]}, b4{this->data[_pointer++]},
b5{this->data[_pointer++]}, b6{this->data[_pointer++]},
b7{this->data[_pointer++]}, b8{this->data[_pointer++]};
return (uint64_t)b1 << 56 | (uint64_t)b2 << 48 | (uint64_t)b3 << 40 |
(uint64_t)b4 << 32 | (uint64_t)b5 << 24 | (uint64_t)b6 << 16 |
(uint64_t)b7 << 8 | (uint64_t)b8;
}
float
BinaryReader::read_float()
{
IntAndFloat32bit num;
num.i = read_ui32();
return num.f;
}
double
BinaryReader::read_double()
{
IntAndFloat64bit num;
num.i = read_ui64();
return num.f;
}
glm::vec2
BinaryReader::read_vec2()
{
IntAndFloat32bit x{read_ui32()}, y{read_ui32()};
return glm::vec2{x.f, y.f};
}
glm::vec3
BinaryReader::read_vec3()
{
IntAndFloat32bit x{read_ui32()}, y{read_ui32()}, z{read_ui32()};
return glm::vec3{x.f, y.f, z.f};
}
glm::quat
BinaryReader::read_quat()
{
IntAndFloat32bit w{read_ui32()}, x{read_ui32()}, y{read_ui32()},
z{read_ui32()};
return glm::quat{w.f, x.f, y.f, z.f};
}
glm::mat4
BinaryReader::read_mat4()
{
glm::mat4 matrix;
float *offset_matrix_data{glm::value_ptr(matrix)};
for(int i{0}; i < 16; i++)
{
IntAndFloat32bit num;
num.i = read_ui32();
offset_matrix_data[i] = num.f;
}
return matrix;
}
void
BinaryReader::read_chars(char *str, int size)
{
for(int i{0}; i < size; i++)
str[i] = (char)data[this->_pointer++];
}
|
