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BIO_vsnprintf.3
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Always turn off hyphenation; it makes .\" way too many mistakes in technical documents. .if n .ad l .nh .SH "NAME" BIO_printf, BIO_vprintf, BIO_snprintf, BIO_vsnprintf \&\- formatted output to a BIO .SH "SYNOPSIS" .IX Header "SYNOPSIS" .Vb 1 \& #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) .Ve .SH "DESCRIPTION" .IX Header "DESCRIPTION" \&\fBBIO_printf()\fR is similar to the standard C \fBprintf()\fR function, except that the output is sent to the specified \s-1BIO,\s0 \fBbio\fR, rather than standard output. All common format specifiers are supported. .PP \&\fBBIO_vprintf()\fR is similar to the \fBvprintf()\fR function found on many platforms, the output is sent to the specified \s-1BIO,\s0 \fBbio\fR, rather than standard output. All common format specifiers are supported. The argument list \fBargs\fR is a stdarg argument list. .PP \&\fBBIO_snprintf()\fR is for platforms that do not have the common \fBsnprintf()\fR function. It is like \fBsprintf()\fR except that the size parameter, \fBn\fR, specifies the size of the output buffer. .PP \&\fBBIO_vsnprintf()\fR is to \fBBIO_snprintf()\fR as \fBBIO_vprintf()\fR is to \fBBIO_printf()\fR. .SH "RETURN VALUES" .IX Header "RETURN VALUES" All functions return the number of bytes written, or \-1 on error. For \fBBIO_snprintf()\fR and \fBBIO_vsnprintf()\fR this includes when the output buffer is too small. .SH "COPYRIGHT" .IX Header "COPYRIGHT" Copyright 2017 The OpenSSL Project Authors. All Rights Reserved. .PP Licensed under the OpenSSL license (the \*(L"License\*(R"). You may not use this file except in compliance with the License. You can obtain a copy in the file \s-1LICENSE\s0 in the source distribution or at <https://www.openssl.org/source/license.html>.
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