forked from stijnherfst/HiveWE
-
Notifications
You must be signed in to change notification settings - Fork 0
/
binary_writer.ixx
73 lines (62 loc) · 2.53 KB
/
binary_writer.ixx
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
module;
#include <cstring>
#include <string>
#include <vector>
export module BinaryWriter;
export class BinaryWriter {
public:
std::vector<uint8_t> buffer;
template <typename T = void, typename U>
void write(U value) {
static_assert(std::is_standard_layout<U>::value, "U must be of standard layout.");
if constexpr (not std::is_void_v<T>) {
static_assert(std::is_standard_layout<T>::value, "T must be of standard layout.");
T temp = static_cast<T>(value);
buffer.resize(buffer.size() + sizeof(T));
std::memcpy(buffer.data() + buffer.size() - sizeof(T), &temp, sizeof(T));
} else {
U temp = value;
buffer.resize(buffer.size() + sizeof(U));
std::memcpy(buffer.data() + buffer.size() - sizeof(U), &temp, sizeof(U));
}
}
/// Writes the string to the buffer (null terminated if the input string is null terminated)
/// ToDo string_view?
void write_string(const std::string& string) {
buffer.resize(buffer.size() + string.size());
std::copy(string.begin(), string.end(), buffer.end() - string.size());
}
/// Writes a null terminated string to the buffer
/// ToDo string_view?
void write_c_string(const std::string& string) {
if (!string.empty() && string.back() == '\0') {
buffer.resize(buffer.size() + string.size());
std::copy(string.begin(), string.end(), buffer.end() - string.size());
} else {
buffer.resize(buffer.size() + string.size() + 1);
std::copy(string.begin(), string.end(), buffer.end() - string.size() - 1);
buffer[buffer.size() - 1] = '\0';
}
}
/// Writes a null terminated string to the buffer with padding
/// ToDo string_view?
void write_c_string_padded(const std::string& string, int final_size) {
buffer.resize(buffer.size() + final_size);
std::copy(string.begin(), string.end(), buffer.end() - final_size);
// std::vector::resize will memset to 0 so adding a \0 terminator is not required
}
/// Copies the contents of the array to the buffer, has special code for std::string
template <typename T>
void write_vector(const std::vector<T>& vector) {
if constexpr (std::is_same_v<T, std::string>) {
for (const auto& i : vector) {
buffer.insert(buffer.end(), i.begin(), i.end());
}
} else {
static_assert(std::is_standard_layout<T>::value, "T must be of standard layout or std::string.");
buffer.resize(buffer.size() + vector.size() * sizeof(T));
// std::copy(vector.begin(), vector.end(), buffer.end() - vector.size() * sizeof(T));
std::memcpy(buffer.data() + buffer.size() - vector.size() * sizeof(T), vector.data(), vector.size() * sizeof(T));
}
}
};