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/*
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. 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 COPYRIGHT HOLDER 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.
*/
#include <AK/PrintfImplementation.h>
#include <AK/StdLibExtras.h>
#include <Kernel/KBufferBuilder.h>
#include <stdarg.h>
namespace Kernel {
inline bool KBufferBuilder::can_append(size_t size) const
{
if (!m_buffer)
return false;
bool has_space = ((m_size + size) < m_buffer->size());
ASSERT(has_space);
return has_space;
}
OwnPtr<KBuffer> KBufferBuilder::build()
{
m_buffer->set_size(m_size);
return m_buffer.release_nonnull();
}
KBufferBuilder::KBufferBuilder()
: m_buffer(KBuffer::try_create_with_size(4 * MiB, Region::Access::Read | Region::Access::Write))
{
}
void KBufferBuilder::append(const StringView& str)
{
if (str.is_empty())
return;
if (!can_append(str.length()))
return;
memcpy(insertion_ptr(), str.characters_without_null_termination(), str.length());
m_size += str.length();
}
void KBufferBuilder::append(const char* characters, int length)
{
if (!length)
return;
if (!can_append(length))
return;
memcpy(insertion_ptr(), characters, length);
m_size += length;
}
void KBufferBuilder::append(char ch)
{
if (!can_append(1))
return;
insertion_ptr()[0] = ch;
m_size += 1;
}
void KBufferBuilder::appendvf(const char* fmt, va_list ap)
{
printf_internal([this](char*&, char ch) {
append(ch);
},
nullptr, fmt, ap);
}
void KBufferBuilder::appendf(const char* fmt, ...)
{
va_list ap;
va_start(ap, fmt);
appendvf(fmt, ap);
va_end(ap);
}
void KBufferBuilder::append_escaped_for_json(const StringView& string)
{
for (auto ch : string) {
switch (ch) {
case '\e':
append("\\u001B");
break;
case '\b':
append("\\b");
break;
case '\n':
append("\\n");
break;
case '\t':
append("\\t");
break;
case '\"':
append("\\\"");
break;
case '\\':
append("\\\\");
break;
default:
append(ch);
}
}
}
}
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