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NAME

       losig - mbk logical signal

DESCRIPTION

       The losig is used to describe a logical signal.

       The   declarations   needed   to   work   on  losig  are  available  in  the  header  file
       "/labo/include/mlo404.h", where '404' is the actual mbk version.

       The following C structure supports the description of the logical signal :
              typedef struct losig {
                 struct losig     ∗NEXT;
                 struct chain     ∗NAMECHAIN;
                 float            CAPA;
                 long             INDEX;
                 char             TYPE;
                 struct ptype     ∗USER;
              } losig_list;

       NEXT                Pointer to the next losig of the list.

       INDEX               Long integer beeing the  signal  identifier.  It  represents  the  net
                           number at a given hierachical level, and must be unique.

       NAMECHAIN           Pointer  to  a  list  of names, aliases, attached to the signal. If no
                           names are given then the field points  to  NULL.  Many  names  can  be
                           present  if  the  signal  result  of  the  flatten  of a netlist.  See
                           chain(3) for details.

       CAPA                Floating point number containing the value of  the  total  capacitance
                           attached  to  a  signal in respect to ground. This field may be set to
                           zero, since it make sens only if the signal is the result of a  layout
                           extraction, or has been used for electrical simulation purposes.

       TYPE                This  field  can  take  two legal values depending on the types of the
                           connectors attached to it. See locon(3) for detail.

                           EXTERNAL            The signal is connected at least to  one  external
                                               connector,   a  connector  of  the  figure  beeing
                                               described.

                           INTERNAL            The signal  is  connected  only  to  instances  or
                                               transistors connectors.

                           The  tools  using  the TYPE should fill it with care, since unexpected
                           results may appear if the consistency with connectors is violated.

       USER                Pointer to a ptype list, see ptype(3) for details, that is  a  general
                           purpose pointer used to share informations on the signal.

       Remark :            the  netlist view is given in terms of connectors pointing to signals,
                           but it may be useful to have also the dual representation, in term  of
                           list  of  connectors attached to a single signal. This may be obtained
                           by the lofigchain function.

SEE ALSO

       mbk(1),  addlosig(3),  getlosig(3),  dellosig(3),   lofigchain(3),   locon(3),   lofig(3),
       chain(3), ptype(3).