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.TH MTREE_INIT 3 2023-06-20 "LIBRECAST" "Librecast Programmer's Manual"
.SH NAME
mtree_init, mtree_free \- initialize and free a merkle tree
.SH LIBRARY
Librecast library
.RI ( liblibrecast ", " \-llibrecast )
.SH SYNOPSIS
.nf
.B #include <librecast/mtree.h>
.PP
.BI "int mtree_init(mtree_t " *tree ", size_t " sz ");"
.BI "void mtree_free(mtree_t " *tree ");"
.fi
.PP
Compile and link with \fI\-llibrecast\fP.
.SH DESCRIPTION
The
.BR tree_init
function initializes the merkle tree structure
.IR tree
with base data size
.IR sz .
sz is the size in bytes of the base file or data which will be used to build the
tree by calling
.BR mtree_build (3).
.SH RETURN VALUE
.BR mtree_init ()
returns zero on success.
On error, -1 is returned, and
.I errno
is set to indicate the error.
.PP
The
.BR mtree_free ()
function returns no value, and preserves
.IR errno .
.SH ERRORS
.TP
.BR ENOMEM
Not enough space/cannot allocate memory (POSIX.1-2001).
.PP
.SH SEE ALSO
.BR mdex_get (3),
.BR mdex_put (3),
.BR mdex_del (3)
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