77 lines
2.5 KiB
C++
77 lines
2.5 KiB
C++
/*
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* Copyright 2009-2010 Cybozu Labs, Inc.
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* Copyright 2011-2014 Kazuho Oku
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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,
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* this 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
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <iostream>
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#include <iterator>
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#include "../picojson.h"
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// this example reads a array of hashes (each item representing a 2D point),
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// and prints the x and y values to stdout
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namespace {
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class root_context : public picojson::deny_parse_context {
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public:
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bool parse_array_start() {
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return true; // only allow array as root
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}
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template <typename Iter> bool parse_array_item(picojson::input<Iter>& in, size_t) {
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picojson::value item;
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// parse the array item
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picojson::default_parse_context ctx(&item);
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if (! picojson::_parse(ctx, in)) {
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return false;
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}
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// assert that the array item is a hash
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if (! item.is<picojson::object>()) {
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return false;
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}
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// print x and y
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std::cout << item.get("x") << ',' << item.get("y").to_str()
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<< std::endl;
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return true;
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}
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};
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}
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int main(void)
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{
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root_context ctx;
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std::string err;
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picojson::_parse(ctx, std::istream_iterator<char>(std::cin),
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std::istream_iterator<char>(), &err);
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if (! err.empty()) {
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std::cerr << err << std::endl;
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return 1;
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}
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return 0;
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}
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