| /* |
| * ===================================================================== |
| * Copyright (c) 2012, PLUMgrid, http://plumgrid.com |
| * |
| * This source is subject to the PLUMgrid License. |
| * All rights reserved. |
| * |
| * THIS CODE AND INFORMATION ARE PROVIDED "AS IS" WITHOUT WARRANTY OF |
| * ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO |
| * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND/OR FITNESS FOR A |
| * PARTICULAR PURPOSE. |
| * |
| * PLUMgrid confidential information, delete if you are not the |
| * intended recipient. |
| * |
| * ===================================================================== |
| */ |
| |
| #include <algorithm> |
| #include <assert.h> |
| #include "exception.h" |
| #include "cc/parser.h" |
| #include "cc/type_helper.h" |
| |
| namespace ebpf { |
| namespace cc { |
| |
| using std::find; |
| using std::move; |
| using std::string; |
| using std::unique_ptr; |
| |
| bool Parser::variable_exists(VariableDeclStmtNode* decl, bool search_local) { |
| if (scopes_->current_var()->lookup(decl->id_->name_, search_local) == NULL) { |
| return false; |
| } |
| return true; |
| } |
| |
| VariableDeclStmtNode* Parser::variable_add(VariableDeclStmtNode* decl) { |
| |
| if (variable_exists(decl, true)) { |
| fprintf(stderr, "redeclaration of variable %s", decl->id_->name_.c_str()); |
| assert(0 && "redeclaration of variable"); |
| // how to raise a bison error from here? |
| return decl; |
| } |
| decl->scope_id_ = string("v") + std::to_string(scopes_->current_var()->id_) + string("_"); |
| scopes_->current_var()->add(decl->id_->name_, decl); |
| return decl; |
| } |
| |
| VariableDeclStmtNode* Parser::variable_add(VariableDeclStmtNode* decl, ExprNode* init_expr) { |
| AssignExprNode::Ptr assign(new AssignExprNode(decl->id_->copy(), ExprNode::Ptr(init_expr))); |
| decl->init_.push_back(move(assign)); |
| |
| if (variable_exists(decl, true)) { |
| fprintf(stderr, "redeclaration of variable %s", decl->id_->name_.c_str()); |
| assert(0 && "redeclaration of variable"); |
| // how to raise a bison error from here? |
| return decl; |
| } |
| decl->scope_id_ = string("v") + std::to_string(scopes_->current_var()->id_) + string("_"); |
| scopes_->current_var()->add(decl->id_->name_, decl); |
| return decl; |
| } |
| |
| StructVariableDeclStmtNode* Parser::variable_add(StructVariableDeclStmtNode* decl, ExprNodeList* args, bool is_kv) { |
| if (is_kv) { |
| // annotate the init expressions with the declared id |
| for (auto arg = args->begin(); arg != args->end(); ++arg) { |
| // decorate with the name of this decl |
| auto n = static_cast<AssignExprNode*>(arg->get()); |
| n->id_->prepend_dot(decl->id_->name_); |
| } |
| } else { |
| fprintf(stderr, "must use key = value syntax\n"); |
| return NULL; |
| } |
| |
| decl->init_ = move(*args); |
| delete args; |
| |
| if (variable_exists(decl, true)) { |
| fprintf(stderr, "ccpg: warning: redeclaration of variable '%s'\n", decl->id_->name_.c_str()); |
| // how to raise a bison error from here? |
| return decl; |
| } |
| decl->scope_id_ = string("v") + std::to_string(scopes_->current_var()->id_) + string("_"); |
| scopes_->current_var()->add(decl->id_->name_, decl); |
| return decl; |
| } |
| |
| StmtNode* Parser::timer_add(Scopes::StateScope* scope, BlockStmtNode* body) { |
| if (scopes_->top_timer()->lookup("timer", true)) { |
| fprintf(stderr, "redeclaration of timer. Only one timer supported per plum"); |
| assert(0 && "redeclaration of timer. Only one timer supported per plum"); |
| } |
| auto timer = new TimerDeclStmtNode(BlockStmtNode::Ptr(body)); |
| |
| timer->scope_ = scope; |
| |
| scopes_->top_timer()->add("timer", timer); |
| |
| return timer; |
| } |
| |
| StmtNode* Parser::state_add(Scopes::StateScope* scope, IdentExprNode* id, BlockStmtNode* body) { |
| if (scopes_->current_state()->lookup(id->full_name(), true)) { |
| fprintf(stderr, "redeclaration of state %s\n", id->full_name().c_str()); |
| // redeclaration |
| return NULL; |
| } |
| auto state = new StateDeclStmtNode(IdentExprNode::Ptr(id), BlockStmtNode::Ptr(body)); |
| // add a reference to the lower scope |
| state->subs_[0].scope_ = scope; |
| |
| // add me to the upper scope |
| scopes_->current_state()->add(state->id_->full_name(), state); |
| state->scope_id_ = string("s") + std::to_string(scopes_->current_state()->id_) + string("_"); |
| |
| return state; |
| } |
| |
| StmtNode* Parser::state_add(Scopes::StateScope* scope, IdentExprNode* id1, IdentExprNode* id2, BlockStmtNode* body) { |
| auto state = scopes_->current_state()->lookup(id1->full_name(), true); |
| if (!state) { |
| state = new StateDeclStmtNode(IdentExprNode::Ptr(id1), IdentExprNode::Ptr(id2), BlockStmtNode::Ptr(body)); |
| // add a reference to the lower scope |
| state->subs_[0].scope_ = scope; |
| |
| // add me to the upper scope |
| scopes_->current_state()->add(state->id_->full_name(), state); |
| state->scope_id_ = string("s") + std::to_string(scopes_->current_state()->id_) + string("_"); |
| return state; |
| } else { |
| if (state->find_sub(id2->name_) != state->subs_.end()) { |
| fprintf(stderr, "redeclaration of state %s, %s\n", id1->full_name().c_str(), id2->full_name().c_str()); |
| return NULL; |
| } |
| state->subs_.push_back(StateDeclStmtNode::Sub(IdentExprNode::Ptr(id2), BlockStmtNode::Ptr(body), |
| ParserStateStmtNode::Ptr(), scope)); |
| delete id1; |
| |
| return new StateDeclStmtNode(); // stub |
| } |
| } |
| |
| bool Parser::table_exists(TableDeclStmtNode* decl, bool search_local) { |
| if (scopes_->top_table()->lookup(decl->id_->name_, search_local) == NULL) { |
| return false; |
| } |
| return true; |
| } |
| |
| StmtNode* Parser::table_add(IdentExprNode* type, IdentExprNodeList* templates, |
| IdentExprNode* id, string* size) { |
| auto table = new TableDeclStmtNode(IdentExprNode::Ptr(type), |
| move(*templates), |
| IdentExprNode::Ptr(id), size); |
| if (table_exists(table, true)) { |
| fprintf(stderr, "redeclaration of table %s\n", id->name_.c_str()); |
| return table; |
| } |
| scopes_->top_table()->add(id->name_, table); |
| return table; |
| } |
| |
| StmtNode* Parser::struct_add(IdentExprNode* type, FormalList* formals) { |
| auto struct_decl = new StructDeclStmtNode(IdentExprNode::Ptr(type), move(*formals)); |
| if (scopes_->top_struct()->lookup(type->name_, true) != NULL) { |
| fprintf(stderr, "redeclaration of struct %s\n", type->name_.c_str()); |
| return struct_decl; |
| } |
| |
| auto pr_it = pragmas_.find("packed"); |
| if (pr_it != pragmas_.end() && pr_it->second == "true") |
| struct_decl->packed_ = true; |
| |
| int i = 0; |
| size_t offset = 0; |
| for (auto it = struct_decl->stmts_.begin(); it != struct_decl->stmts_.end(); ++it, ++i) { |
| FieldType ft = bits_to_enum((*it)->bit_width_); |
| offset = struct_decl->is_packed() ? offset : align_offset(offset, ft); |
| (*it)->slot_ = i; |
| (*it)->bit_offset_ = offset; |
| offset += (*it)->bit_width_; |
| } |
| struct_decl->bit_width_ = struct_decl->is_packed() ? offset : align_offset(offset, UINT32_T); |
| |
| scopes_->top_struct()->add(type->name_, struct_decl); |
| return struct_decl; |
| } |
| |
| StmtNode* Parser::result_add(int token, IdentExprNode* id, FormalList* formals, BlockStmtNode* body) { |
| // result arguments are pass-by-reference instead of value |
| for (auto it = formals->begin(); it != formals->end(); ++it) { |
| (*it)->storage_type_ = VariableDeclStmtNode::STRUCT_REFERENCE; |
| } |
| StmtNode *stmt = NULL; |
| switch (token) { |
| case Tok::TMATCH: |
| stmt = new MatchDeclStmtNode(IdentExprNode::Ptr(id), move(*formals), BlockStmtNode::Ptr(body)); |
| break; |
| case Tok::TMISS: |
| stmt = new MissDeclStmtNode(IdentExprNode::Ptr(id), move(*formals), BlockStmtNode::Ptr(body)); |
| break; |
| case Tok::TFAILURE: |
| stmt = new FailureDeclStmtNode(IdentExprNode::Ptr(id), move(*formals), BlockStmtNode::Ptr(body)); |
| break; |
| default: |
| {} |
| } |
| return stmt; |
| } |
| |
| void Parser::set_loc(Node *n, const BisonParser::location_type &loc) const { |
| n->line_ = loc.begin.line; |
| n->column_ = loc.begin.column; |
| n->text_ = lexer.text(loc); |
| } |
| |
| string Parser::pragma(const string &name) const { |
| auto it = pragmas_.find(name); |
| if (it == pragmas_.end()) return ""; |
| return it->second; |
| } |
| |
| } // namespace cc |
| } // namespace ebpf |