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96 lines
2.8 KiB
C++
96 lines
2.8 KiB
C++
/*
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* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <AK/PrintfImplementation.h>
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#include <AK/StdLibExtras.h>
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#include <Kernel/KBufferBuilder.h>
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#include <stdarg.h>
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namespace Kernel {
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inline bool KBufferBuilder::can_append(size_t size) const
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{
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bool has_space = ((m_size + size) < m_buffer.size());
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ASSERT(has_space);
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return has_space;
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}
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KBuffer KBufferBuilder::build()
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{
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m_buffer.set_size(m_size);
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return m_buffer;
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}
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KBufferBuilder::KBufferBuilder()
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: m_buffer(KBuffer::create_with_size(4 * MB, Region::Access::Read | Region::Access::Write))
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{
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}
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void KBufferBuilder::append(const StringView& str)
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{
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if (str.is_empty())
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return;
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if (!can_append(str.length()))
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return;
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memcpy(insertion_ptr(), str.characters_without_null_termination(), str.length());
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m_size += str.length();
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}
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void KBufferBuilder::append(const char* characters, int length)
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{
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if (!length)
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return;
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if (!can_append(length))
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return;
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memcpy(insertion_ptr(), characters, length);
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m_size += length;
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}
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void KBufferBuilder::append(char ch)
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{
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if (!can_append(1))
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return;
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insertion_ptr()[0] = ch;
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m_size += 1;
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}
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void KBufferBuilder::appendvf(const char* fmt, va_list ap)
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{
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printf_internal([this](char*&, char ch) {
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append(ch);
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},
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nullptr, fmt, ap);
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}
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void KBufferBuilder::appendf(const char* fmt, ...)
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{
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va_list ap;
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va_start(ap, fmt);
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appendvf(fmt, ap);
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va_end(ap);
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}
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}
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