/src/serenity/AK/StringView.cpp

Source (jump to first uncovered line)
/*
 * Copyright (c) 2018-2021, Andreas Kling <kling@serenityos.org>
 *
 * SPDX-License-Identifier: BSD-2-Clause
 */

#include <AK/AnyOf.h>
#include <AK/ByteBuffer.h>
#include <AK/Find.h>
#include <AK/Function.h>
#include <AK/Memory.h>
#include <AK/StringView.h>
#include <AK/Vector.h>

#ifndef KERNEL
#    include <AK/FlyString.h>
#    include <AK/String.h>
#endif

namespace AK {

#ifndef KERNEL
StringView::StringView(String const& string)
    : m_characters(string.characters())
    , m_length(string.length())
{
}

StringView::StringView(FlyString const& string)
    : m_characters(string.characters())
    , m_length(string.length())
{
}
#endif

StringView::StringView(ByteBuffer const& buffer)
    : m_characters((char const*)buffer.data())
    , m_length(buffer.size())
{
}

Vector<StringView> StringView::split_view(char const separator, bool keep_empty) const
{
    StringView seperator_view { &separator, 1 };
    return split_view(seperator_view, keep_empty);
}

Vector<StringView> StringView::split_view(StringView separator, bool keep_empty) const
{
    Vector<StringView> parts;
    for_each_split_view(separator, keep_empty, [&](StringView view) {
        parts.append(view);
    });
    return parts;
}

Vector<StringView> StringView::lines(bool consider_cr) const
{
    if (is_empty())
        return {};

    if (!consider_cr)
        return split_view('\n', true);

    Vector<StringView> v;
    size_t substart = 0;
    bool last_ch_was_cr = false;
    bool split_view = false;
    for (size_t i = 0; i < length(); ++i) {
        char ch = characters_without_null_termination()[i];
        if (ch == '\n') {
            split_view = true;
            if (last_ch_was_cr) {
                substart = i + 1;
                split_view = false;
            }
        }
        if (ch == '\r') {
            split_view = true;
            last_ch_was_cr = true;
        } else {
            last_ch_was_cr = false;
        }
        if (split_view) {
            size_t sublen = i - substart;
            v.append(substring_view(substart, sublen));
            substart = i + 1;
        }
        split_view = false;
    }
    size_t taillen = length() - substart;
    if (taillen != 0)
        v.append(substring_view(substart, taillen));
    return v;
}

bool StringView::starts_with(char ch) const
{
    if (is_empty())
        return false;
    return ch == characters_without_null_termination()[0];
}

bool StringView::starts_with(StringView str, CaseSensitivity case_sensitivity) const
{
    return StringUtils::starts_with(*this, str, case_sensitivity);
}

bool StringView::ends_with(char ch) const
{
    if (is_empty())
        return false;
    return ch == characters_without_null_termination()[length() - 1];
}

bool StringView::ends_with(StringView str, CaseSensitivity case_sensitivity) const
{
    return StringUtils::ends_with(*this, str, case_sensitivity);
}

bool StringView::matches(StringView mask, Vector<MaskSpan>& mask_spans, CaseSensitivity case_sensitivity) const
{
    return StringUtils::matches(*this, mask, case_sensitivity, &mask_spans);
}

bool StringView::matches(StringView mask, CaseSensitivity case_sensitivity) const
{
    return StringUtils::matches(*this, mask, case_sensitivity);
}

bool StringView::contains(char needle) const
{
    for (char current : *this) {
        if (current == needle)
            return true;
    }
    return false;
}

bool StringView::contains(StringView needle, CaseSensitivity case_sensitivity) const
{
    return StringUtils::contains(*this, needle, case_sensitivity);
}

bool StringView::equals_ignoring_case(StringView other) const
{
    return StringUtils::equals_ignoring_case(*this, other);
}

#ifndef KERNEL
String StringView::to_lowercase_string() const
{
    return StringImpl::create_lowercased(characters_without_null_termination(), length());
}

String StringView::to_uppercase_string() const
{
    return StringImpl::create_uppercased(characters_without_null_termination(), length());
}

String StringView::to_titlecase_string() const
{
    return StringUtils::to_titlecase(*this);
}
#endif

StringView StringView::substring_view_starting_from_substring(StringView substring) const
{
    char const* remaining_characters = substring.characters_without_null_termination();
    VERIFY(remaining_characters >= m_characters);
    VERIFY(remaining_characters <= m_characters + m_length);
    size_t remaining_length = m_length - (remaining_characters - m_characters);
    return { remaining_characters, remaining_length };
}

StringView StringView::substring_view_starting_after_substring(StringView substring) const
{
    char const* remaining_characters = substring.characters_without_null_termination() + substring.length();
    VERIFY(remaining_characters >= m_characters);
    VERIFY(remaining_characters <= m_characters + m_length);
    size_t remaining_length = m_length - (remaining_characters - m_characters);
    return { remaining_characters, remaining_length };
}

bool StringView::copy_characters_to_buffer(char* buffer, size_t buffer_size) const
{
    // We must fit at least the NUL-terminator.
    VERIFY(buffer_size > 0);

    size_t characters_to_copy = min(m_length, buffer_size - 1);
    __builtin_memcpy(buffer, m_characters, characters_to_copy);
    buffer[characters_to_copy] = 0;

    return characters_to_copy == m_length;
}

template<typename T>
Optional<T> StringView::to_int() const
{
    return StringUtils::convert_to_int<T>(*this);
}

template Optional<i8> StringView::to_int() const;
template Optional<i16> StringView::to_int() const;
template Optional<i32> StringView::to_int() const;
template Optional<long> StringView::to_int() const;
template Optional<long long> StringView::to_int() const;

template<typename T>
Optional<T> StringView::to_uint() const
{
    return StringUtils::convert_to_uint<T>(*this);
}

template Optional<u8> StringView::to_uint() const;
template Optional<u16> StringView::to_uint() const;
template Optional<u32> StringView::to_uint() const;
template Optional<unsigned long> StringView::to_uint() const;
template Optional<unsigned long long> StringView::to_uint() const;
template Optional<long> StringView::to_uint() const;
template Optional<long long> StringView::to_uint() const;

#ifndef KERNEL
bool StringView::operator==(String const& string) const
{
    return *this == string.view();
}

String StringView::to_string() const { return String { *this }; }

String StringView::replace(StringView needle, StringView replacement, bool all_occurrences) const
{
    return StringUtils::replace(*this, needle, replacement, all_occurrences);
}
#endif

Vector<size_t> StringView::find_all(StringView needle) const
{
    return StringUtils::find_all(*this, needle);
}

Vector<StringView> StringView::split_view_if(Function<bool(char)> const& predicate, bool keep_empty) const
{
    if (is_empty())
        return {};

    Vector<StringView> v;
    size_t substart = 0;
    for (size_t i = 0; i < length(); ++i) {
        char ch = characters_without_null_termination()[i];
        if (predicate(ch)) {
            size_t sublen = i - substart;
            if (sublen != 0 || keep_empty)
                v.append(substring_view(substart, sublen));
            substart = i + 1;
        }
    }
    size_t taillen = length() - substart;
    if (taillen != 0 || keep_empty)
        v.append(substring_view(substart, taillen));
    return v;
}

}

Coverage Report

Created: 2022-05-20 06:13

Line	Count	Source (jump to first uncovered line)
1		/*
2		* Copyright (c) 2018-2021, Andreas Kling <kling@serenityos.org>
3		*
4		* SPDX-License-Identifier: BSD-2-Clause
5		*/
6
7		#include <AK/AnyOf.h>
8		#include <AK/ByteBuffer.h>
9		#include <AK/Find.h>
10		#include <AK/Function.h>
11		#include <AK/Memory.h>
12		#include <AK/StringView.h>
13		#include <AK/Vector.h>
14
15		#ifndef KERNEL
16		# include <AK/FlyString.h>
17		# include <AK/String.h>
18		#endif
19
20		namespace AK {
21
22		#ifndef KERNEL
23		StringView::StringView(String const& string)
24		: m_characters(string.characters())
25		, m_length(string.length())
26	2	{
27	2	}
28
29		StringView::StringView(FlyString const& string)
30		: m_characters(string.characters())
31		, m_length(string.length())
32	0	{
33	0	}
34		#endif
35
36		StringView::StringView(ByteBuffer const& buffer)
37		: m_characters((char const*)buffer.data())
38		, m_length(buffer.size())
39	0	{
40	0	}
41
42		Vector<StringView> StringView::split_view(char const separator, bool keep_empty) const
43	0	{
44	0	StringView seperator_view { &separator, 1 };
45	0	return split_view(seperator_view, keep_empty);
46	0	}
47
48		Vector<StringView> StringView::split_view(StringView separator, bool keep_empty) const
49	0	{
50	0	Vector<StringView> parts;
51	0	for_each_split_view(separator, keep_empty, [&](StringView view) {
52	0	parts.append(view);
53	0	});
54	0	return parts;
55	0	}
56
57		Vector<StringView> StringView::lines(bool consider_cr) const
58	0	{
59	0	if (is_empty())
60	0	return {};
61
62	0	if (!consider_cr)
63	0	return split_view('\n', true);
64
65	0	Vector<StringView> v;
66	0	size_t substart = 0;
67	0	bool last_ch_was_cr = false;
68	0	bool split_view = false;
69	0	for (size_t i = 0; i < length(); ++i) {
70	0	char ch = characters_without_null_termination()[i];
71	0	if (ch == '\n') {
72	0	split_view = true;
73	0	if (last_ch_was_cr) {
74	0	substart = i + 1;
75	0	split_view = false;
76	0	}
77	0	}
78	0	if (ch == '\r') {
79	0	split_view = true;
80	0	last_ch_was_cr = true;
81	0	} else {
82	0	last_ch_was_cr = false;
83	0	}
84	0	if (split_view) {
85	0	size_t sublen = i - substart;
86	0	v.append(substring_view(substart, sublen));
87	0	substart = i + 1;
88	0	}
89	0	split_view = false;
90	0	}
91	0	size_t taillen = length() - substart;
92	0	if (taillen != 0)
93	0	v.append(substring_view(substart, taillen));
94	0	return v;
95	0	}
96
97		bool StringView::starts_with(char ch) const
98	0	{
99	0	if (is_empty())
100	0	return false;
101	0	return ch == characters_without_null_termination()[0];
102	0	}
103
104		bool StringView::starts_with(StringView str, CaseSensitivity case_sensitivity) const
105	0	{
106	0	return StringUtils::starts_with(*this, str, case_sensitivity);
107	0	}
108
109		bool StringView::ends_with(char ch) const
110	0	{
111	0	if (is_empty())
112	0	return false;
113	0	return ch == characters_without_null_termination()[length() - 1];
114	0	}
115
116		bool StringView::ends_with(StringView str, CaseSensitivity case_sensitivity) const
117	0	{
118	0	return StringUtils::ends_with(*this, str, case_sensitivity);
119	0	}
120
121		bool StringView::matches(StringView mask, Vector<MaskSpan>& mask_spans, CaseSensitivity case_sensitivity) const
122	0	{
123	0	return StringUtils::matches(*this, mask, case_sensitivity, &mask_spans);
124	0	}
125
126		bool StringView::matches(StringView mask, CaseSensitivity case_sensitivity) const
127	0	{
128	0	return StringUtils::matches(*this, mask, case_sensitivity);
129	0	}
130
131		bool StringView::contains(char needle) const
132	110	{
133	220	for (char current : *this) {
134	220	if (current == needle)
135	8	return true;
136	220	}
137	102	return false;
138	110	}
139
140		bool StringView::contains(StringView needle, CaseSensitivity case_sensitivity) const
141	0	{
142	0	return StringUtils::contains(*this, needle, case_sensitivity);
143	0	}
144
145		bool StringView::equals_ignoring_case(StringView other) const
146	0	{
147	0	return StringUtils::equals_ignoring_case(*this, other);
148	0	}
149
150		#ifndef KERNEL
151		String StringView::to_lowercase_string() const
152	0	{
153	0	return StringImpl::create_lowercased(characters_without_null_termination(), length());
154	0	}
155
156		String StringView::to_uppercase_string() const
157	0	{
158	0	return StringImpl::create_uppercased(characters_without_null_termination(), length());
159	0	}
160
161		String StringView::to_titlecase_string() const
162	0	{
163	0	return StringUtils::to_titlecase(*this);
164	0	}
165		#endif
166
167		StringView StringView::substring_view_starting_from_substring(StringView substring) const
168	0	{
169	0	char const* remaining_characters = substring.characters_without_null_termination();
170	0	VERIFY(remaining_characters >= m_characters);
171	0	VERIFY(remaining_characters <= m_characters + m_length);
172	0	size_t remaining_length = m_length - (remaining_characters - m_characters);
173	0	return { remaining_characters, remaining_length };
174	0	}
175
176		StringView StringView::substring_view_starting_after_substring(StringView substring) const
177	0	{
178	0	char const* remaining_characters = substring.characters_without_null_termination() + substring.length();
179	0	VERIFY(remaining_characters >= m_characters);
180	0	VERIFY(remaining_characters <= m_characters + m_length);
181	0	size_t remaining_length = m_length - (remaining_characters - m_characters);
182	0	return { remaining_characters, remaining_length };
183	0	}
184
185		bool StringView::copy_characters_to_buffer(char* buffer, size_t buffer_size) const
186	0	{
187		// We must fit at least the NUL-terminator.
188	0	VERIFY(buffer_size > 0);
189
190	0	size_t characters_to_copy = min(m_length, buffer_size - 1);
191	0	__builtin_memcpy(buffer, m_characters, characters_to_copy);
192	0	buffer[characters_to_copy] = 0;
193
194	0	return characters_to_copy == m_length;
195	0	}
196
197		template<typename T>
198		Optional<T> StringView::to_int() const
199	0	{
200	0	return StringUtils::convert_to_int<T>(*this);
201	0	} Unexecuted instantiation: AK::Optional<signed char> AK::StringView::to_int<signed char>() const Unexecuted instantiation: AK::Optional<short> AK::StringView::to_int<short>() const Unexecuted instantiation: AK::Optional<int> AK::StringView::to_int<int>() const Unexecuted instantiation: AK::Optional<long> AK::StringView::to_int<long>() const Unexecuted instantiation: AK::Optional<long long> AK::StringView::to_int<long long>() const
202
203		template Optional<i8> StringView::to_int() const;
204		template Optional<i16> StringView::to_int() const;
205		template Optional<i32> StringView::to_int() const;
206		template Optional<long> StringView::to_int() const;
207		template Optional<long long> StringView::to_int() const;
208
209		template<typename T>
210		Optional<T> StringView::to_uint() const
211	0	{
212	0	return StringUtils::convert_to_uint<T>(*this);
213	0	} Unexecuted instantiation: AK::Optional<unsigned char> AK::StringView::to_uint<unsigned char>() const Unexecuted instantiation: AK::Optional<unsigned short> AK::StringView::to_uint<unsigned short>() const Unexecuted instantiation: AK::Optional<unsigned int> AK::StringView::to_uint<unsigned int>() const Unexecuted instantiation: AK::Optional<unsigned long> AK::StringView::to_uint<unsigned long>() const Unexecuted instantiation: AK::Optional<unsigned long long> AK::StringView::to_uint<unsigned long long>() const Unexecuted instantiation: AK::Optional<long> AK::StringView::to_uint<long>() const Unexecuted instantiation: AK::Optional<long long> AK::StringView::to_uint<long long>() const
214
215		template Optional<u8> StringView::to_uint() const;
216		template Optional<u16> StringView::to_uint() const;
217		template Optional<u32> StringView::to_uint() const;
218		template Optional<unsigned long> StringView::to_uint() const;
219		template Optional<unsigned long long> StringView::to_uint() const;
220		template Optional<long> StringView::to_uint() const;
221		template Optional<long long> StringView::to_uint() const;
222
223		#ifndef KERNEL
224		bool StringView::operator==(String const& string) const
225	0	{
226	0	return *this == string.view();
227	0	}
228
229	0	String StringView::to_string() const { return String { *this }; }
230
231		String StringView::replace(StringView needle, StringView replacement, bool all_occurrences) const
232	0	{
233	0	return StringUtils::replace(*this, needle, replacement, all_occurrences);
234	0	}
235		#endif
236
237		Vector<size_t> StringView::find_all(StringView needle) const
238	0	{
239	0	return StringUtils::find_all(*this, needle);
240	0	}
241
242		Vector<StringView> StringView::split_view_if(Function<bool(char)> const& predicate, bool keep_empty) const
243	0	{
244	0	if (is_empty())
245	0	return {};
246
247	0	Vector<StringView> v;
248	0	size_t substart = 0;
249	0	for (size_t i = 0; i < length(); ++i) {
250	0	char ch = characters_without_null_termination()[i];
251	0	if (predicate(ch)) {
252	0	size_t sublen = i - substart;
253	0	if (sublen != 0 \|\| keep_empty)
254	0	v.append(substring_view(substart, sublen));
255	0	substart = i + 1;
256	0	}
257	0	}
258	0	size_t taillen = length() - substart;
259	0	if (taillen != 0 \|\| keep_empty)
260	0	v.append(substring_view(substart, taillen));
261	0	return v;
262	0	}
263
264		}