fmemopen、open_memstream/wmemstream

fmemopen - open memory as stream

#include <stdio.h>

FILE *fmemopen(void *buf, size_t size, const char *mode);
//Returns： stream pointer if OK， NULL on error

fmemopen

buf

size

buf = NULL

size

stream

mode

FILE *open_memstream(char **ptr, size_t *sizeloc);

#include <wchar.h>
FILE *open_wmemstream(wchar_t **ptr, size_t *sizeloc);

open_memstream, open_wmemstream