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// Copyright 2024 syzkaller project authors. All rights reserved.
// Use of this source code is governed by Apache 2 LICENSE that can be found in the LICENSE file.
#ifndef SYZ_DECLEXTRACT_JSON_H
#define SYZ_DECLEXTRACT_JSON_H
#include <cassert>
#include <cstdio>
#include <memory>
#include <string>
#include <vector>
class JSONPrinter {
public:
JSONPrinter() : Top(*this) {}
template <typename T> void Field(const char* Name, const T& V, bool Last = false) {
printf("%s\"%s\": ", Indent(), Name);
print(*this, V);
printf("%s\n", Last ? "" : ",");
}
const char* Indent() const {
static std::string Indents;
while (Indents.size() < Nesting)
Indents.push_back('\t');
return Indents.c_str() + Indents.size() - Nesting;
}
class Scope {
public:
Scope(JSONPrinter& Printer, bool Array = false) : Printer(Printer), Array(Array) {
printf("%c\n", "{["[Array]);
Printer.Nesting++;
assert(Printer.Nesting < 1000);
}
~Scope() {
assert(Printer.Nesting > 0);
Printer.Nesting--;
printf("%s%c", Printer.Indent(), "}]"[Array]);
}
private:
JSONPrinter& Printer;
const bool Array;
};
private:
friend class Scope;
size_t Nesting = 0;
Scope Top;
};
inline void print(JSONPrinter& Printer, int V) { printf("%d", V); }
inline void print(JSONPrinter& Printer, unsigned V) { printf("%u", V); }
inline void print(JSONPrinter& Printer, int64_t V) { printf("%ld", V); }
inline void print(JSONPrinter& Printer, bool V) { printf("%s", V ? "true" : "false"); }
inline void print(JSONPrinter& Printer, const char* V) { printf("\"%s\"", V ? V : ""); }
inline void print(JSONPrinter& Printer, const std::string& V) { print(Printer, V.c_str()); }
template <typename E> void print(JSONPrinter& Printer, const std::unique_ptr<E>& V) {
if (!V)
printf("null");
else
print(Printer, *V);
}
template <typename E> void print(JSONPrinter& Printer, const std::vector<E>& V) {
JSONPrinter::Scope Scope(Printer, true);
size_t i = 0;
for (const auto& Elem : V) {
printf("%s", Printer.Indent());
print(Printer, Elem);
printf("%s\n", ++i == V.size() ? "" : ",");
}
}
#endif
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