/* * pANS stdio -- vsnprintf */#define _C99_SNPRINTF_EXTENSION #include "iolib.h" int vsnprintf(char *buf, size_t nbuf, const char *fmt, va_list args){	int n;	FILE *f=_IO_sopenw();	if(f==NULL)		return 0;	setvbuf(f, buf, _IOFBF, nbuf);	n=vfprintf(f, fmt, args);	_IO_sclose(f);	return n;}