dbprint.h

/*
 * SPDX-FileCopyrightText: 2013 Barefoot Networks, Inc.
 * Copyright 2013-present Barefoot Networks, Inc.
 *
 * SPDX-License-Identifier: Apache-2.0
 */
 
#ifndef IR_DBPRINT_H_
#define IR_DBPRINT_H_
 
#include <cassert>
#include <iosfwd>
 
#include "lib/log.h"
 
namespace P4::DBPrint {
 
// Support for debug print, needed by the LOG* macros.
// TODO: These should be part of a def file
enum dbprint_flags {
    Precedence = 0xf,
    Prec_Postfix = 15,
    Prec_Prefix = 14,
    Prec_Mul = 13,
    Prec_Div = 13,
    Prec_Mod = 13,
    Prec_Add = 12,
    Prec_Sub = 12,
    Prec_AddSat = 12,
    Prec_SubSat = 12,
    Prec_Shl = 11,
    Prec_Shr = 11,
    Prec_BAnd = 10,
    Prec_BXor = 9,
    Prec_BOr = 8,
    Prec_Lss = 7,
    Prec_Leq = 7,
    Prec_Grt = 7,
    Prec_Geq = 7,
    Prec_Equ = 6,
    Prec_Neq = 6,
    Prec_LAnd = 5,
    Prec_LOr = 4,
    Prec_Cond = 3,
    Prec_Low = 1,
 
    Reset = 0,
    TableNoActions = 0x10,
    Brief = 0x20,
};
 
int dbgetflags(std::ostream &out);
int dbsetflags(std::ostream &out, int val, int mask = ~0U);
 
inline int getprec(std::ostream &out) { return dbgetflags(out) & DBPrint::Precedence; }
class setflags_helper {
    int val, mask;
 
 protected:
    setflags_helper(int v, int m) : val(v), mask(m) { assert((val & ~mask) == 0); }
 
 public:
    setflags_helper() = delete;
 
    void set(std::ostream &out) const { dbsetflags(out, val, mask); }
};
struct setprec : public setflags_helper {
    explicit setprec(int prec) : setflags_helper(prec, DBPrint::Precedence) {}
};
struct setflag : public setflags_helper {
    explicit setflag(int fl) : setflags_helper(fl, fl) {}
};
struct clrflag : public setflags_helper {
    explicit clrflag(int fl) : setflags_helper(0, fl) {}
};
 
inline std::ostream &operator<<(std::ostream &out, const DBPrint::setflags_helper &p) {
    p.set(out);
    return out;
}
 
inline std::ostream &operator<<(std::ostream &out, const DBPrint::dbprint_flags fl) {
    DBPrint::dbsetflags(out, fl, fl ? fl : ~0);
    return out;
}
 
}  // end namespace P4::DBPrint
 
#endif /* IR_DBPRINT_H_ */