libraries/eosiolib/core/eosio/print.hpp

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Namespaces

Name
eosio
eosio::internal_use_do_not_use

Classes

	Name
class	eosio::iostream

Detailed Description

Copyright: defined in eos/LICENSE

Source code

#pragma once
#include <utility>
#include <string>



namespace eosio {
   namespace internal_use_do_not_use {
      extern "C" {
         __attribute__((eosio_wasm_import))
         void prints(const char*);

         __attribute__((eosio_wasm_import))
         void prints_l(const char*, uint32_t);

         __attribute__((eosio_wasm_import))
         void printi(int64_t);

         __attribute__((eosio_wasm_import))
         void printui(uint64_t);

         __attribute__((eosio_wasm_import))
         void printi128(const int128_t*);

         __attribute__((eosio_wasm_import))
         void printui128(const uint128_t*);

         __attribute__((eosio_wasm_import))
         void printsf(float);

         __attribute__((eosio_wasm_import))
         void printdf(double);

         __attribute__((eosio_wasm_import))
         void printqf(const long double*);

         __attribute__((eosio_wasm_import))
         void printn(uint64_t);

         __attribute__((eosio_wasm_import))
         void printhex(const void*, uint32_t);
      }
   };

   inline void printhex( const void* ptr, uint32_t size) {
      internal_use_do_not_use::printhex(ptr, size);
   }

   inline void printl( const char* ptr, size_t len ) {
     internal_use_do_not_use::prints_l(ptr, len);
   }

   inline void print( const char* ptr ) {
     internal_use_do_not_use::prints(ptr);
   }

   template <typename T, std::enable_if_t<std::is_integral<std::decay_t<T>>::value &&
                                          std::is_signed<std::decay_t<T>>::value, int> = 0>
   inline void print( T num ) {
      if constexpr(std::is_same<T, int128_t>::value)
        internal_use_do_not_use::printi128(&num);
      else if constexpr(std::is_same<T, char>::value)
        internal_use_do_not_use::prints_l( &num, 1 );
      else
        internal_use_do_not_use::printi(num);
   }

   template <typename T, std::enable_if_t<std::is_integral<std::decay_t<T>>::value &&
                                          !std::is_signed<std::decay_t<T>>::value, int> = 0>
   inline void print( T num ) {
      if constexpr(std::is_same<T, uint128_t>::value)
         internal_use_do_not_use::printui128(&num);
      else if constexpr(std::is_same<T, bool>::value)
         internal_use_do_not_use::prints(num?"true":"false");
      else
        internal_use_do_not_use::printui(num);
   }

   inline void print( float num ) { internal_use_do_not_use::printsf( num ); }

   inline void print( double num ) { internal_use_do_not_use::printdf( num ); }

   inline void print( long double num ) { internal_use_do_not_use::printqf( &num ); }

   template<typename T, std::enable_if_t<!std::is_integral<std::decay_t<T>>::value, int> = 0>
   inline void print( T&& t ) {
      if constexpr (std::is_same<std::decay_t<T>, std::string>::value)
         internal_use_do_not_use::prints_l( t.c_str(), t.size() );
      else if constexpr (std::is_same<std::decay_t<T>, char*>::value)
         internal_use_do_not_use::prints(t);
      else
         t.print();
   }

   inline void print_f( const char* s ) {
     internal_use_do_not_use::prints(s);
   }

   template <typename Arg, typename... Args>
   inline void print_f( const char* s, Arg val, Args... rest ) {
      while ( *s != '\0' ) {
         if ( *s == '%' ) {
            print( val );
            print_f( s+1, rest... );
            return;
         }
         internal_use_do_not_use::prints_l( s, 1 );
         s++;
      }
   }

   template<typename Arg, typename... Args>
   void print( Arg&& a, Args&&... args ) {
      print(std::forward<Arg>(a));
      print(std::forward<Args>(args)...);
   }

   class iostream {};


   template<typename T>
   inline iostream& operator<<( iostream& out, const T& v ) {
      print( v );
      return out;
   }


   static iostream cout;
}

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Updated on 2022-12-05 at 15:38:08 +0000