vsscanf_s, vswscanf_s

From RAD Studio
Jump to: navigation, search

Go Up to stdio.h Index


Header File

stdio.h

Category

Formatted input/output functions

Prototype

int vsscanf_s(const char * restrict s, const char * restrict format, va_list arg);

int vswscanf_s(const wchar_t * restrict s, const wchar_t * restrict format, va_list arg);

Description

Replaces vsscanf adding security enhancements.

vsscanf_s is equivalent to sscanf_s, swscanf_s with the argument list replaced by arg.

vsscanf_s does not call the va_end macro.

Return Value

vsscanf_s returns the number of input fields successfully scanned, converted, and stored; the return value does not include scanned fields that were not stored. If no fields were stored, the return value is zero. In case of an input error, vsscanf_s returns the value of the macro EOF.

Example

#include <stdio.h>
#include <stdarg.h>
char buffer[80] = "30 90.0 abc";
int vssf(char *fmt, ...)
{
   va_list  argptr;
   int cnt;
   fflush(stdin);
   va_start(argptr, fmt);
   cnt = vsscanf_s(buffer, fmt, argptr);
   va_end(argptr);
   return(cnt);
}
int main(void)
{
   int inumber;
   float fnumber;
   char string[80];
   vssf("%d %f %s", &inumber, &fnumber, string);
   printf("%d %f %s\n", inumber, fnumber, string);
   return 0;
}

Portability

POSIX Win32 ANSI C ANSI C++

+

+

+

See Also