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/*
* Copyright (C) 2013-2015 Max Kellermann <max@duempel.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the
* distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* FOUNDATION OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef STRING_VIEW_HXX
#define STRING_VIEW_HXX
#include "ConstBuffer.hxx"
#include <string.h>
struct StringView : ConstBuffer<char> {
StringView() = default;
constexpr StringView(pointer_type _data, size_type _size)
:ConstBuffer<char>(_data, _size) {}
constexpr StringView(pointer_type _begin, pointer_type _end)
:ConstBuffer<char>(_begin, _end - _begin) {}
StringView(pointer_type _data)
:ConstBuffer<char>(_data,
_data != nullptr ? strlen(_data) : 0) {}
constexpr StringView(std::nullptr_t n)
:ConstBuffer<char>(n) {}
static constexpr StringView Empty() {
return StringView("", size_t(0));
}
template<size_t n>
static constexpr StringView Literal(const char (&_data)[n]) {
static_assert(n > 0, "");
return {_data, n - 1};
}
static constexpr StringView Literal() {
return StringView("", size_t(0));
}
void SetEmpty() {
data = "";
size = 0;
}
gcc_pure
pointer_type Find(char ch) const {
return (pointer_type)memchr(data, ch, size);
}
StringView &operator=(std::nullptr_t) {
data = nullptr;
size = 0;
return *this;
}
StringView &operator=(pointer_type _data) {
data = _data;
size = _data != nullptr ? strlen(_data) : 0;
return *this;
}
gcc_pure
bool StartsWith(StringView needle) const {
return size >= needle.size &&
memcmp(data, needle.data, needle.size) == 0;
}
gcc_pure
bool Equals(StringView other) const {
return size == other.size &&
memcmp(data, other.data, size) == 0;
}
template<size_t n>
bool EqualsLiteral(const char (&other)[n]) const {
return Equals(Literal(other));
}
gcc_pure
bool EqualsIgnoreCase(StringView other) const {
return size == other.size &&
strncasecmp(data, other.data, size) == 0;
}
template<size_t n>
bool EqualsLiteralIgnoreCase(const char (&other)[n]) const {
return EqualsIgnoreCase(Literal(other));
}
/**
* Skip all whitespace at the beginning.
*/
void StripLeft();
/**
* Skip all whitespace at the end.
*/
void StripRight();
void Strip() {
StripLeft();
StripRight();
}
};
#endif
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