std::fill isn't optimized into memset for floats Under Consideration04 3Votes ACAl Cash -Reported Sep 15, 2022 7:18 AM [severity:It’s more difficult to complete my work] void zero_float_fill(float* buffer) { std::fill(buffer, buffer + N, 0.0f); } ...
long转string java_java中Long类型转换为String类型的两种方法及区别
Interestingly while there is a template/header optimization to implement std::fill via memset for byte types, but in this case it is a compiler optimization to transform the actual loop. Strangely,for a std::vector<char>, gcc begins to optimize also fill(1). The Intel compiler does not, ...
setfill<>() setiosflags() setlocale() setprecision() setvbuf() setw() shared_future<> (C++11 起) shared_lock<> (C++14 起) shared_mutex (C++17 起) shared_ptr<> (C++11 起) shared_timed_mutex (C++14 起) shift_left<>() (C++20 起) shift_right<>() (C++20 起) showbase() showpo...
C program not linking to CRT calls memset() for unknown reasons C/C++ : converting std::string to const char* I get the error : left of '.c_str' must have class/struct/union type is 'char *' C# to C++ dll - how to pass strings as In/Out parameters to unmanaged functions that ...
uninitialized_fill_n<>()uninitialized_move<>() (C++17 起)uninitialized_move_n<>() (C++17 起)uninitialized_value_construct<>() (C++17 起)uninitialized_value_construct_n<>() (C++17 起)unique<>()unique_copy<>()unique_lock<> (C++11 起)unique_ptr<> (C++11 起)unitbuf()unordered_map<>...
SYMBOL(uninitialized_fill_n, std::, <memory>) SYMBOL(uninitialized_move, std::, <memory>) SYMBOL(uninitialized_move_n, std::, <memory>) SYMBOL(uninitialized_value_construct, std::, <memory>) SYMBOL(uninitialized_value_construct_n, std::, <memory>) ...
memset(textString, '\0', sizeof(textString)); va_list args; va_start ( args, fmt ); vsnprintf ( textString, MAX_BUFFER*5, fmt, args ); va_end ( args ); std::string retStr = textString; return retStr; } textString 的初始化已经将整个缓冲区设置为零。不需要memset... 这会...
C program not linking to CRT calls memset() for unknown reasons C/C++ : converting std::string to const char* I get the error : left of '.c_str' must have class/struct/union type is 'char *' C# to C++ dll - how to pass strings as In/Out parameters to unmanaged functions that ...
memset(textString, '\0', sizeof(textString)); va_list args; va_start ( args, fmt ); vsnprintf ( textString, MAX_BUFFER*5, fmt, args ); va_end ( args ); std::string retStr = textString; return retStr; } textString 的初始化已经将整个缓冲区设置为零。不需要memset... 这会...