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Scan input from a string (varargs)
#include <stdio.h>
#include <stdarg.h>
int vsscanf( const char* in_string,
const char* format,
va_list arg );
- in_string
- The string that you want to read from.
- format
- A string that specifies the format of the input.
For more information, see
scanf().
The formatting string determines what additional arguments you need to
provide.
- arg
- A variable-argument list of the additional arguments, which you
must have initialized with the
va_start()
macro.
libc
Use the -l c option to
qcc
to link against this library.
This library is usually included automatically.
The vsscanf() function scans input from the string designated by
in_string, under control of the argument format.
The vsscanf() function is a “varargs” version of
sscanf().
The number of input arguments for which
values were successfully scanned and stored is returned, or
EOF
when the scanning is terminated by reaching the end of the input string.
#include <stdio.h>
#include <stdarg.h>
#include <stdlib.h>
void sfind( char* string, char* format, ... )
{
va_list arglist;
va_start( arglist, format );
vsscanf( string, format, arglist );
va_end( arglist );
}
int main( void )
{
int day, year;
char weekday[10], month[12];
sfind( "Monday June 28 1999",
"%s %s %d %d",
weekday, month, &day, &year );
printf( "\n%s, %s %d, %d\n",
weekday, month, day, year );
return EXIT_SUCCESS;
}
ANSI,
POSIX 1003.1
Safety: | |
Cancellation point |
No |
Interrupt handler |
No |
Signal handler |
Read the Caveats |
Thread |
Yes |
It's safe to call vsscanf() in a signal
handler if the data isn't floating point.
fscanf(),
fwscanf(),
scanf(),
sscanf(),
swscanf(),
va_start(),
vfscanf(),
vfwscanf(),
vscanf(),
vswscanf(),
vwscanf(),
wscanf()
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Warning: main() [function.include]: Failed opening '/www/www/htdocs/style/footer.php' for inclusion (include_path='.:/www/www/common:/www/www/php/lib/php') in /www/www/docs/6.4.1/neutrino/lib_ref/v/vsscanf.html on line 180