hex.h

/*
 * SPDX-FileCopyrightText: 2013 Barefoot Networks, Inc.
 * Copyright 2013-present Barefoot Networks, Inc.
 *
 * SPDX-License-Identifier: Apache-2.0
 */
 
#ifndef LIB_HEX_H_
#define LIB_HEX_H_
 
#include <cstdint>
#include <iomanip>
#include <iostream>
#include <vector>
 
namespace P4 {
 
class hex {
    std::intmax_t val;
    int width;
    char fill;
 
 public:
    explicit hex(intmax_t v, int w = 0, char f = ' ') : val(v), width(w), fill(f) {}
    explicit hex(void *v, int w = 0, char f = ' ') : val((intmax_t)v), width(w), fill(f) {}
    friend std::ostream &operator<<(std::ostream &os, const hex &h);
};
 
inline std::ostream &operator<<(std::ostream &os, const hex &h) {
    auto save = os.flags();
    auto save_fill = os.fill();
    os << std::hex << std::setw(h.width) << std::setfill(h.fill) << h.val;
    os.fill(save_fill);
    os.flags(save);
    return os;
}
 
class hexvec {
    void *data;
    size_t elsize, len;
    int width;
    char fill;
 
 public:
    template <typename I>
    hexvec(I *d, size_t l, int w = 0, char f = ' ')
        : data(d), elsize(sizeof(I)), len(l), width(w), fill(f) {}
    template <typename T>
    explicit hexvec(std::vector<T> &d, int w = 0, char f = ' ')
        : data(d.data()), elsize(sizeof(T)), len(d.size()), width(w), fill(f) {}
    friend std::ostream &operator<<(std::ostream &os, const hexvec &h);
};
 
std::ostream &operator<<(std::ostream &os, const hexvec &h);
 
}  // namespace P4
 
#endif /* LIB_HEX_H_ */