} 实测,当格式化字符串的长度大于等于1024时,会崩溃。 改成:vsnprintf_s(logbuff,sizeof(logbuff)-1, format, ap)即可,会自动截断。
使用指向参数列表的指针写入格式化的输出。 这些函数的版本是vsnprintf、_vsnprintf、_vsnprintf_l、_vsnwprintf、_vsnwprintf_l,具有安全性增强功能,如CRT 中的安全功能中所述。 语法 C复制 intvsnprintf_s(char*buffer,size_tsizeOfBuffer,size_tcount,constchar*format, va_list argptr )...
Each of these functions takes a pointer to an argument list, then formats and writes up to count characters of the given data to the memory pointed to by buffer and appends a terminating null.If count is _TRUNCATE, then these functions write as much of the string as will fit in ...
int vsnprintf_s( char *buffer, size_t sizeOfBuffer, size_t count, const char *format, va_list argptr ); int _vsnprintf_s( char *buffer, size_t sizeOfBuffer, size_t count, const char *format, va_list argptr ); int _vsnprintf_s_l( char *buffer, si...
编写使用指针参数列表的格式化输出。vsnprintf、_vsnprintf、_vsnprintf_l、_vsnwprintf、_vsnwprintf_l的一些版本提供安全增强功能(如CRT 中的安全功能所述)。 复制 int vsnprintf_s( char *buffer, size_t sizeOfBuffer, size_t count, const char *format, va_list argptr ); int _vsnprintf_s( char *...
_vstprintf_s_l(pBuffer, STRING_LENGTH, strFormat, NULL, argsList); va_end(argsList); 1. 2. 3. 4. 5. 可变参数的个数和占位符不一致,不会崩溃,但是类型不一样就会崩溃,比如 ("%s %s ", 10, "test") 会崩溃 ("%s %s ", ) 不会崩溃...
intvsnprintf_s(char*buffer,size_tsizeOfBuffer,size_tcount,constchar*format, va_list argptr );int_vsnprintf_s(char*buffer,size_tsizeOfBuffer,size_tcount,constchar*format, va_list argptr );int_vsnprintf_s_l(char*buffer,size_tsizeOfBuffer,size_tcount,constchar*format,_locale_tlocale, va...
sprintf_s(data.buf, len,"%d",1234); Debug模式下执行,会触发assert,如下图: 总结:sprintf_s函数只能在Windows下使用,虽然不会出现写坏内存的情况,但是会触发assert,导致程序中断,使用起来也要慎重。 vsprintf_s的行为与sprintf_s一样。 三、_snprintf(Windows only) ...
int vsnprintf_s( char *buffer, size_t sizeOfBuffer, size_t count, const char *format, va_list argptr ); int _vsnprintf_s( char *buffer, size_t sizeOfBuffer, size_t count, const char *format, va_list argptr ); int _vsnprintf_s_l( char *buffer, size_t sizeOfBuffer, size_...
_vsnprintf_s是一种 C 语言函数，用于将格式化字符串写入指定大小的缓冲区。它是 _vsprintf_s 的变体...