NAME

       BIO_printf, BIO_vprintf, BIO_snprintf, BIO_vsnprintf - formatted output to a BIO

SYNOPSIS

        #include <openssl/bio.h>

        int BIO_printf(BIO *bio, const char *format, ...)
        int BIO_vprintf(BIO *bio, const char *format, va_list args)

        int BIO_snprintf(char *buf, size_t n, const char *format, ...)
        int BIO_vsnprintf(char *buf, size_t n, const char *format, va_list args)

DESCRIPTION

       BIO_printf() is similar to the standard C printf() function, except that the output is sent to the
       specified BIO, bio, rather than standard output.  All common format specifiers are supported.

       BIO_vprintf() is similar to the vprintf() function found on many platforms, the output is sent to the
       specified BIO, bio, rather than standard output.  All common format specifiers are supported. The
       argument list args is a stdarg argument list.

       BIO_snprintf() is for platforms that do not have the common snprintf() function. It is like sprintf()
       except that the size parameter, n, specifies the size of the output buffer.

       BIO_vsnprintf() is to BIO_snprintf() as BIO_vprintf() is to BIO_printf().

RETURN VALUES

       All functions return the number of bytes written, or -1 on error.  For BIO_snprintf() and BIO_vsnprintf()
       this includes when the output buffer is too small.

COPYRIGHT

       Copyright 2017 The OpenSSL Project Authors. All Rights Reserved.

       Licensed under the OpenSSL license (the "License").  You may not use this file except in compliance with
       the License.  You can obtain a copy in the file LICENSE in the source distribution or at
       <https://www.openssl.org/source/license.html>.