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+.TH LIBJ2_JU_TO_J2I 3 LIBJ2
+.SH NAME
+libj2_ju_to_j2i \- Extend integer to double-max precision
+
+.SH SYNOPSIS
+.nf
+#include <libj2.h>
+
+void \fBlibj2_ju_to_j2i\fP(uintmax_t \fIa\fP, struct libj2_j2i *\fIr\fP);
+void \fBlibj2_ju_to_j2u\fP(uintmax_t \fIa\fP, struct libj2_j2u *\fIr\fP);
+void \fBlibj2_ji_to_j2i\fP(intmax_t \fIa\fP, struct libj2_j2i *\fIr\fP);
+.fi
+.PP
+Link with
+.IR -lj2 .
+
+.SH DESCRIPTION
+The above listed functions calculate
+stores the value of
+.I a
+in
+.IR r ,
+extending
+.I a
+to double-max precision.
+.PP
+The arguments are assumed to be
+.RI non- NULL .
+
+.SH RETURN VALUE
+None.
+
+.SH ERRORS
+The above listed functions cannot fail.
+
+.SH HISTORY
+The
+.BR libj2_ju_to_j2u ()
+function was added in version 1.0 of
+.BR libj2 .
+
+The
+.BR libj2_ju_to_j2i ()
+and
+.BR libj2_ji_to_j2i ()
+functions were added in version 1.1 of
+.BR libj2 .
+
+.SH SEE ALSO
+.BR libj2 (7),
+.BR struct_libj2_j2i (3),
+.BR libj2_j2u_to_j2i (3),
+.BR libj2_j2i_to_str (3),
+.BR libj2_str_to_j2i (3)