bool move_wire_to_statement(evl_tokens &statement_tokens, evl_tokens &tokens) {
assert(statement_tokens.empty());
assert(!tokens.empty());
for (; !tokens.empty();) {
statement_tokens.push_back(tokens.front());
tokens.erase(tokens.begin());
if (statement_tokens.back().str == "=")
break; //exit if the ending "=" is found
}
if (statement_tokens.back().str != "=") {
std::cerr << "Look for '=' but reach the end of file" << std::endl;
return false;
}
return true;
}
bool group_tokens_into_statements(evl_statements &statements, evl_tokens &tokens)
{
for (; !tokens.empty();)
{ // generate one statement per iteration evl_token token = tokens.front();
evl_token token = tokens.front();
if (token.type != evl_token::NAME)
{
std::cerr << "Need a NAME token but found '" << token.str << "' on line " << token.line_no << std::endl;
return false;
}
if (token.str == "module") // MODULE statement
{
evl_statement module;
module.type = evl_statement::MODULE;
if (!move_tokens_to_statement(module.tokens, tokens))
return false;
statements.push_back(module);
}
else if (token.str == "endmodule") // ENDMODULE statement
{
evl_statement endmodule;
endmodule.type = evl_statement::ENDMODULE; endmodule.tokens.push_back(token);
tokens.erase(tokens.begin()); statements.push_back(endmodule);
}
else if (token.str == "wire") // WIRE statement
{
evl_statement wire;
wire.type = evl_statement::WIRE;
if (!move_tokens_to_statement(wire.tokens, tokens))
return false;
statements.push_back(wire);
}
//ASSIGN statement
else if (token.str == "assign"){
evl_statement assign;
assign.type = evl_statement::ASSIGN;
if (!move_tokens_to_statement(assign.tokens, tokens))
return false;
statements.push_back(assign);
}
else // COMPONENT statement
{
evl_statement component;
component.type = evl_statement::COMPONENT;
if (!move_tokens_to_statement(component.tokens, tokens))
return false;
statements.push_back(component);
}
}
return true;
}
bool move_tokens_to_statement(evl_tokens &statement_tokens, evl_tokens &tokens)
{
for (; !tokens.empty();)
{
statement_tokens.push_back(tokens.front());
tokens.erase(tokens.begin()); // consume one token per iteration
if (statement_tokens.back().str == ";")
break; // exit if the ending ";" is found
}
if (statement_tokens.back().str != ";")
{
std::cerr << "Look for ';' but reach the end of file" << std::endl;
return false;
}
return true;
}
bool group_tokens_into_statements(evl_statements &statements, evl_tokens &tokens) {
assert(statements.empty());
for(; !tokens.empty();) { //generates one statement per iteration
evl_token token = tokens.front();
if (token.type != evl_token::NAME) {
std::cerr << "Need a NAME token but found '" << token.str << "' on line" << token.line_no << std::endl;
return false;
}
if ((token.str == "INPUT") || (token.str == "OUTPUT") || (token.str == "AND") ||
(token.str == "NAND") || (token.str == "OR") || (token.str == "NOR") ||
(token.str == "DFF") || (token.str == "NOT")) {
evl_statement component;
component.type = evl_statement::COMPONENT;
if(!move_comp_to_statement(component.tokens, tokens)) {
return false;
}
//INPUT and OUTPUT are both components and wires;
if ((token.str == "INPUT") || (token.str == "OUTPUT")) {
evl_statement wire;
wire.type = evl_statement::WIRE;
wire.tokens = component.tokens;
statements.push_back(wire);
}
statements.push_back(component);
}
else {
evl_statement wire;
wire.type = evl_statement::WIRE;
if(!move_wire_to_statement(wire.tokens, tokens)) {
return false;
}
statements.push_back(wire);
}
}
return true;
}
