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
157
158
159
160
161
162
|
/*************************************************************************/
/* string_buffer.h */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2020 Juan Linietsky, Ariel Manzur. */
/* Copyright (c) 2014-2020 Godot Engine contributors (cf. AUTHORS.md). */
/* */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the */
/* "Software"), to deal in the Software without restriction, including */
/* without limitation the rights to use, copy, modify, merge, publish, */
/* distribute, sublicense, and/or sell copies of the Software, and to */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions: */
/* */
/* The above copyright notice and this permission notice shall be */
/* included in all copies or substantial portions of the Software. */
/* */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
/*************************************************************************/
#ifndef STRING_BUFFER_H
#define STRING_BUFFER_H
#include "core/string/ustring.h"
template <int SHORT_BUFFER_SIZE = 64>
class StringBuffer {
char32_t short_buffer[SHORT_BUFFER_SIZE];
String buffer;
int string_length = 0;
_FORCE_INLINE_ char32_t *current_buffer_ptr() {
return static_cast<String &>(buffer).empty() ? short_buffer : buffer.ptrw();
}
public:
StringBuffer &append(char32_t p_char);
StringBuffer &append(const String &p_string);
StringBuffer &append(const char *p_str);
StringBuffer &append(const char32_t *p_str, int p_clip_to_len = -1);
_FORCE_INLINE_ void operator+=(char32_t p_char) {
append(p_char);
}
_FORCE_INLINE_ void operator+=(const String &p_string) {
append(p_string);
}
_FORCE_INLINE_ void operator+=(const char *p_str) {
append(p_str);
}
_FORCE_INLINE_ void operator+=(const char32_t *p_str) {
append(p_str);
}
StringBuffer &reserve(int p_size);
int length() const;
String as_string();
double as_double();
int64_t as_int();
_FORCE_INLINE_ operator String() {
return as_string();
}
};
template <int SHORT_BUFFER_SIZE>
StringBuffer<SHORT_BUFFER_SIZE> &StringBuffer<SHORT_BUFFER_SIZE>::append(char32_t p_char) {
reserve(string_length + 2);
current_buffer_ptr()[string_length++] = p_char;
return *this;
}
template <int SHORT_BUFFER_SIZE>
StringBuffer<SHORT_BUFFER_SIZE> &StringBuffer<SHORT_BUFFER_SIZE>::append(const String &p_string) {
return append(p_string.get_data());
}
template <int SHORT_BUFFER_SIZE>
StringBuffer<SHORT_BUFFER_SIZE> &StringBuffer<SHORT_BUFFER_SIZE>::append(const char *p_str) {
int len = strlen(p_str);
reserve(string_length + len + 1);
char32_t *buf = current_buffer_ptr();
for (const char *c_ptr = p_str; *c_ptr; ++c_ptr) {
buf[string_length++] = *c_ptr;
}
return *this;
}
template <int SHORT_BUFFER_SIZE>
StringBuffer<SHORT_BUFFER_SIZE> &StringBuffer<SHORT_BUFFER_SIZE>::append(const char32_t *p_str, int p_clip_to_len) {
int len = 0;
while ((p_clip_to_len < 0 || len < p_clip_to_len) && p_str[len]) {
++len;
}
reserve(string_length + len + 1);
memcpy(&(current_buffer_ptr()[string_length]), p_str, len * sizeof(char32_t));
string_length += len;
return *this;
}
template <int SHORT_BUFFER_SIZE>
StringBuffer<SHORT_BUFFER_SIZE> &StringBuffer<SHORT_BUFFER_SIZE>::reserve(int p_size) {
if (p_size < SHORT_BUFFER_SIZE || p_size < buffer.size()) {
return *this;
}
bool need_copy = string_length > 0 && buffer.empty();
buffer.resize(next_power_of_2(p_size));
if (need_copy) {
memcpy(buffer.ptrw(), short_buffer, string_length * sizeof(char32_t));
}
return *this;
}
template <int SHORT_BUFFER_SIZE>
int StringBuffer<SHORT_BUFFER_SIZE>::length() const {
return string_length;
}
template <int SHORT_BUFFER_SIZE>
String StringBuffer<SHORT_BUFFER_SIZE>::as_string() {
current_buffer_ptr()[string_length] = '\0';
if (buffer.empty()) {
return String(short_buffer);
} else {
buffer.resize(string_length + 1);
return buffer;
}
}
template <int SHORT_BUFFER_SIZE>
double StringBuffer<SHORT_BUFFER_SIZE>::as_double() {
current_buffer_ptr()[string_length] = '\0';
return String::to_float(current_buffer_ptr());
}
template <int SHORT_BUFFER_SIZE>
int64_t StringBuffer<SHORT_BUFFER_SIZE>::as_int() {
current_buffer_ptr()[string_length] = '\0';
return String::to_int(current_buffer_ptr());
}
#endif // STRING_BUFFER_H
|