1=pod 2 3=head1 NAME 4 5BIO_f_prefix, BIO_set_prefix, BIO_set_indent, BIO_get_indent 6- prefix BIO filter 7 8=head1 SYNOPSIS 9 10 #include <openssl/bio.h> 11 12 const BIO_METHOD *BIO_f_prefix(void); 13 long BIO_set_prefix(BIO *b, const char *prefix); 14 long BIO_set_indent(BIO *b, long indent); 15 long BIO_get_indent(BIO *b); 16 17=head1 DESCRIPTION 18 19BIO_f_cipher() returns the prefix BIO method. This is a filter for 20text output, where each line gets automatically prefixed and indented 21according to user input. 22 23The prefix and the indentation are combined. For each line of output 24going through this filter, the prefix is output first, then the amount 25of additional spaces indicated by the indentation, and then the line 26itself. 27 28By default, there is no prefix, and indentation is set to 0. 29 30BIO_set_prefix() sets the prefix to be used for future lines of 31text, using I<prefix>. I<prefix> may be NULL, signifying that there 32should be no prefix. If I<prefix> isn't NULL, this function makes a 33copy of it. 34 35BIO_set_indent() sets the indentation to be used for future lines of 36text, using I<indent>. Negative values are not allowed. 37 38BIO_get_indent() gets the current indentation. 39 40=head1 NOTES 41 42BIO_set_prefix(), BIO_set_indent() and BIO_get_indent() are 43implemented as macros. 44 45=head1 RETURN VALUES 46 47BIO_f_prefix() returns the prefix BIO method. 48 49BIO_set_prefix() returns 1 if the prefix was correctly set, or <=0 on 50failure. 51 52BIO_set_indent() returns 1 if the prefix was correctly set, or <=0 on 53failure. 54 55BIO_get_indent() returns the current indentation, or a negative value for failure. 56 57=head1 SEE ALSO 58 59L<bio(7)> 60 61=head1 COPYRIGHT 62 63Copyright 2019 The OpenSSL Project Authors. All Rights Reserved. 64 65Licensed under the Apache License 2.0 (the "License"). You may not use 66this file except in compliance with the License. You can obtain a copy 67in the file LICENSE in the source distribution or at 68L<https://www.openssl.org/source/license.html>. 69 70=cut 71
