5 BIO_printf, BIO_vprintf, BIO_snprintf, BIO_vsnprintf
6 - formatted output to a BIO
10 #include <openssl/bio.h>
12 int BIO_printf(BIO *bio, const char *format, ...);
13 int BIO_vprintf(BIO *bio, const char *format, va_list args);
15 int BIO_snprintf(char *buf, size_t n, const char *format, ...);
16 int BIO_vsnprintf(char *buf, size_t n, const char *format, va_list args);
20 BIO_printf() is similar to the standard C printf() function, except that
21 the output is sent to the specified BIO, I<bio>, rather than standard
22 output. All common format specifiers are supported.
24 BIO_vprintf() is similar to the vprintf() function found on many platforms,
25 the output is sent to the specified BIO, I<bio>, rather than standard
26 output. All common format specifiers are supported. The argument
27 list I<args> is a stdarg argument list.
29 BIO_snprintf() is for platforms that do not have the common snprintf()
30 function. It is like sprintf() except that the size parameter, I<n>,
31 specifies the size of the output buffer.
33 BIO_vsnprintf() is to BIO_snprintf() as BIO_vprintf() is to BIO_printf().
37 All functions return the number of bytes written, or -1 on error.
38 For BIO_snprintf() and BIO_vsnprintf() this includes when the output
43 Except when I<n> is 0, both BIO_snprintf() and BIO_vsnprintf() always
44 terminate their output with C<'\0'>. This includes cases where -1 is
45 returned, such as when there is insufficient space to output the whole
50 Copyright 2017-2021 The OpenSSL Project Authors. All Rights Reserved.
52 Licensed under the Apache License 2.0 (the "License"). You may not use
53 this file except in compliance with the License. You can obtain a copy
54 in the file LICENSE in the source distribution or at
55 L<https://www.openssl.org/source/license.html>.