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+.TH LIBKECCAK_BEHEX_UPPER 3 LIBKECCAK-%VERSION%
+.SH NAME
+libkeccak_behex_upper - Converts a binary hashsum to uppercase hexadecimal
+.SH SYNOPSIS
+.LP
+.nf
+#include <libkeccak.h>
+.P
+void libkeccak_behex_upper(char *restrict \fIoutput\fP,
+                           const char *restrict \fIhashsum\fP,
+                           size_t \fIn\fP);
+.fi
+.P
+Link with \fI-lkeccak\fP.
+.SH DESCRIPTION
+The
+.BR libkeccak_behex_upper ()
+function
+converts a binary hashsum, stored in \fIhashsum\fP,
+to uppercase hexadecimal, and stores the
+hexadecimal representation in \fIoutput\fP.
+.PP
+\fIoutput\fP will be terminated by a NUL-character.
+.PP
+The \fIn\fP parameter specifies the number of bytes
+the binary hashsum is comprised. \fIoutput\fP needs
+an allocation size of (2 * \fIn\fP + 1).
+.SH RETURN VALUES
+The
+.BR libkeccak_behex_upper ()
+function does return any value.
+.SH ERRORS
+The
+.BR libkeccak_behex_upper ()
+function cannot fail.
+.SH SEE ALSO
+.BR libkeccak_behex_lower (3),
+.BR libkeccak_unhex (3)
+.SH AUTHORS
+Principal author, Mattias Andrée.  See the LICENSE file for the full
+list of authors.
+.SH BUGS
+Please report bugs to https://github.com/maandree/libkeccak/issues or to
+maandree@member.fsf.org