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Serenity Operating System
1/*
2 * Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are met:
7 *
8 * 1. Redistributions of source code must retain the above copyright notice, this
9 * list of conditions and the following disclaimer.
10 *
11 * 2. Redistributions in binary form must reproduce the above copyright notice,
12 * this list of conditions and the following disclaimer in the documentation
13 * and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
16 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
18 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
21 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
22 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
23 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
24 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 */
26
27#include <AK/PrintfImplementation.h>
28#include <AK/StdLibExtras.h>
29#include <AK/StringBuilder.h>
30#include <AK/String.h>
31
32namespace AK {
33
34inline void StringBuilder::will_append(size_t size)
35{
36 if ((m_length + size) > (size_t)m_buffer.size())
37 m_buffer.grow(max((size_t)16, (size_t)m_buffer.size() * 2 + size));
38}
39
40StringBuilder::StringBuilder(size_t initial_capacity)
41{
42 m_buffer.grow((int)initial_capacity);
43}
44
45void StringBuilder::append(const StringView& str)
46{
47 if (str.is_empty())
48 return;
49 will_append(str.length());
50 memcpy(m_buffer.data() + m_length, str.characters_without_null_termination(), str.length());
51 m_length += str.length();
52}
53
54void StringBuilder::append(const char* characters, size_t length)
55{
56 if (!length)
57 return;
58 will_append(length);
59 memcpy(m_buffer.data() + m_length, characters, length);
60 m_length += length;
61}
62
63void StringBuilder::append(char ch)
64{
65 will_append(1);
66 m_buffer.data()[m_length] = ch;
67 m_length += 1;
68}
69
70void StringBuilder::appendvf(const char* fmt, va_list ap)
71{
72 printf_internal([this](char*&, char ch) {
73 append(ch);
74 },
75 nullptr, fmt, ap);
76}
77
78void StringBuilder::appendf(const char* fmt, ...)
79{
80 va_list ap;
81 va_start(ap, fmt);
82 will_append(strlen(fmt));
83 appendvf(fmt, ap);
84 va_end(ap);
85}
86
87ByteBuffer StringBuilder::to_byte_buffer()
88{
89 m_buffer.trim(m_length);
90 m_length = 0;
91 return move(m_buffer);
92}
93
94String StringBuilder::to_string()
95{
96 return String((const char*)m_buffer.data(), m_length);
97}
98
99String StringBuilder::build()
100{
101 return to_string();
102}
103
104StringView StringBuilder::string_view() const
105{
106 return StringView { (const char*)m_buffer.data(), m_length };
107}
108
109void StringBuilder::clear()
110{
111 m_buffer.clear();
112 m_length = 0;
113}
114
115}