byteorder.so

berkeley db 4.6.21的源码。berkeley db是一个简单的数据库管理系统

m4_comment([$Id: byteorder.so,v 10.17 2001/02/15 22:21:13 bostic Exp $])

m4_ref_title(Access Methods,
    Selecting a byte order,
    selecting a @byte order,
    am_conf/cachesize, am_conf/dup)

m4_p([dnl
Database files created by m4_db can be created in either little- or
big-endian formats.  The byte order used for the underlying database
is specified by calling the m4_refT(dbh_set_lorder).  If no order
is selected, the native format of the machine on which the database is
created will be used.])

m4_p([dnl
m4_db databases are architecture independent, and any format database can
be used on a machine with a different native format.  In this case, as
each page that is read into or written from the cache must be converted
to or from the host format, and databases with non-native formats will
incur a performance penalty for the run-time conversion.])

m4_p([m4_bold([dnl
It is important to note that the m4_db access methods do no data
conversion for application specified data.  Key/data pairs written on a
little-endian format architecture will be returned to the application
exactly as they were written when retrieved on a big-endian format
architecture.])])

m4_page_footer