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/*
* Copyright 2021 Max Kellermann <max.kellermann@gmail.com>
*
* 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 YAJL_GEN_HXX
#define YAJL_GEN_HXX
#include "util/ConstBuffer.hxx"
#include <yajl/yajl_gen.h>
#include <algorithm>
#include <string_view>
namespace Yajl {
/**
* OO wrapper for #yajl_gen.
*/
class Gen {
yajl_gen gen = nullptr;
public:
Gen() = default;
explicit Gen(const yajl_alloc_funcs *allocFuncs) noexcept
:gen(yajl_gen_alloc(allocFuncs)) {}
Gen(Gen &&src) noexcept
:gen(std::exchange(src.gen, nullptr)) {}
~Gen() noexcept {
if (gen != nullptr)
yajl_gen_free(gen);
}
Gen &operator=(Gen &&src) noexcept {
using std::swap;
swap(gen, src.gen);
return *this;
}
void Integer(long long int number) noexcept {
yajl_gen_integer(gen, number);
}
void String(std::string_view s) noexcept {
yajl_gen_string(gen, (const unsigned char *)s.data(), s.size());
}
void OpenMap() noexcept {
yajl_gen_map_open(gen);
}
void CloseMap() noexcept {
yajl_gen_map_close(gen);
}
void OpenArray() noexcept {
yajl_gen_array_open(gen);
}
void CloseArray() noexcept {
yajl_gen_array_close(gen);
}
ConstBuffer<char> GetBuffer() const noexcept {
const unsigned char *buf;
size_t len;
auto status = yajl_gen_get_buf(gen, &buf, &len);
if (status != yajl_gen_status_ok)
return nullptr;
return {(const char *)buf, len};
}
};
} // namespace Yajl
#endif
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