vsscanf_s, vswscanf_s
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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++ |
|---|---|---|---|
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