static void find_d_z_abl(chain_list* abl, long value)
{
if (ABL_ATOM(abl)) {
if (ABL_ATOM_VALUE(abl)==getablatomdc()/* = namealloc("'d'")*/) {
/*non standard IEEE VHDL*/ /*it means "don't care"*/
/* we can put zero either one, only to simplify*/
ABL_CAR_L(abl)=value?getablatomone():getablatomzero();
}
else if (ABL_ATOM_VALUE(abl)==getablatomtristate()/* =namealloc("'z'")*/){
/*no drive on signal*/
/* a pull-up is done for better conductance*/
ABL_CAR_L(abl)=getablatomone()/* = namealloc("'1'")*/;
}
return;
}
/*the first operator influences the most*/
switch (ABL_OPER(abl)) {
case ABL_OR: case ABL_NOR: value=1;
case ABL_AND: case ABL_NAND: value=0;
}
/*for each operator*/
for (abl=ABL_CDR(abl); abl; abl=ABL_CDR(abl)) {
find_d_z_abl(ABL_CAR(abl),value);
}
}
static int loc_pattern_matching(chain_list* expr, chain_list* pattern)
{
if (!expr || !pattern) {
fprintf(stderr,"loc_pattern_matching: NULL pointer\n");
exit(1);
}
/*pattern is an atom*/
if (ABL_ATOM (pattern)) {
/*constants MUST match*/
if (ABL_ATOM_VALUE(pattern)==getablatomone()) {
if (ABL_ATOM(expr) && ABL_ATOM_VALUE(expr)==getablatomone()) return 1;
else return 0;
}
if (ABL_ATOM_VALUE(pattern)==getablatomzero()) {
if (ABL_ATOM(expr) && ABL_ATOM_VALUE(expr)==getablatomzero()) return 1;
else return 0;
}
if (ABL_ATOM_VALUE(pattern)==getablatomdc() /* 'd' */) {
if (ABL_ATOM(expr) && ABL_ATOM_VALUE(expr)==getablatomdc()) return 1;
else return 0;
}
if (ABL_ATOM_VALUE(pattern)==getablatomtristate() /* 'z' */) {
if (ABL_ATOM(expr) && ABL_ATOM_VALUE(expr)==getablatomtristate())
return 1;
else return 0;
}
return relation_between(expr,ABL_ATOM_VALUE(pattern));
}
/* pattern isn't an atom and expr is*/
if (ABL_ATOM (expr)) return 0;
/* not the same oper */
if (ABL_OPER (expr) != ABL_OPER (pattern)) return 0;
if (ABL_ARITY (expr) != ABL_ARITY (pattern)) return 0;
for (pattern = ABL_CDR(pattern); pattern&&expr; pattern=ABL_CDR(pattern)) {
expr = ABL_CDR(expr);
if (!expr) return 0;
if (!loc_pattern_matching(ABL_CAR (expr), ABL_CAR (pattern))) return 0;
}
return 1;
}
