VFSCANF(3) NEWLIB VFSCANF(3)NAME
4.69 `vfscanf', `vscanf', `vsscanf'--format argument list
SYNOPSIS
#include <stdio.h>
#include <stdarg.h>
int vscanf(const char *FMT, va_list LIST);
int vfscanf(FILE *FP, const char *FMT, va_list LIST);
int vsscanf(const char *STR, const char *FMT, va_list LIST);
int _vscanf_r(struct _reent *REENT, const char *FMT,
va_list LIST);
int _vfscanf_r(struct _reent *REENT, FILE *FP, const char *FMT,
va_list LIST);
int _vsscanf_r(struct _reent *REENT, const char *STR,
const char *FMT, va_list LIST);
DESCRIPTION
`vscanf', `vfscanf', and `vsscanf' are (respectively) variants of
`scanf', `fscanf', and `sscanf'. They differ only in allowing their
caller to pass the variable argument list as a `va_list' object (ini‐
tialized by `va_start') rather than directly accepting a variable num‐
ber of arguments.
RETURNS
The return values are consistent with the corresponding functions:
`vscanf' returns the number of input fields successfully scanned, con‐
verted, and stored; the return value does not include scanned fields
which were not stored.
If `vscanf' attempts to read at end-of-file, the return value is
`EOF'.
If no fields were stored, the return value is `0'.
The routines `_vscanf_r', `_vfscanf_f', and `_vsscanf_r' are reen‐
trant versions which take an additional first parameter which points to
the reentrancy structure.
PORTABILITY
These are GNU extensions.
Supporting OS subroutines required:
SEE ALSOvfscanf is part of the library. The full documentation for is main‐
tained as a Texinfo manual. If info and are properly installed at your
site, the command
info
will give you access to the complete manual.
NEWLIB April 2010 VFSCANF(3)
