Shinichiro Hamaji | 776ca30 | 2015-06-06 03:52:48 +0900 | [diff] [blame] | 1 | #include "eval.h" |
| 2 | |
| 3 | #include "ast.h" |
| 4 | #include "file.h" |
| 5 | #include "rule.h" |
| 6 | #include "strutil.h" |
| 7 | #include "value.h" |
| 8 | #include "var.h" |
| 9 | |
| 10 | EvalResult::~EvalResult() { |
| 11 | for (Rule* r : rules) |
| 12 | delete r; |
| 13 | for (auto p : rule_vars) |
| 14 | delete p.second; |
| 15 | delete vars; |
| 16 | } |
| 17 | |
| 18 | Evaluator::Evaluator(const Vars* vars) |
| 19 | : in_vars_(vars), |
| 20 | vars_(new Vars()), |
| 21 | last_rule_(NULL) { |
| 22 | } |
| 23 | |
| 24 | Evaluator::~Evaluator() { |
| 25 | for (Rule* r : rules_) { |
| 26 | delete r; |
| 27 | } |
| 28 | delete vars_; |
| 29 | // for (auto p : rule_vars) { |
| 30 | // delete p.second; |
| 31 | // } |
| 32 | } |
| 33 | |
| 34 | void Evaluator::EvalAssign(const AssignAST* ast) { |
| 35 | loc_ = ast->loc(); |
| 36 | last_rule_ = NULL; |
| 37 | |
| 38 | const char* origin = "file"; |
| 39 | |
| 40 | StringPiece lhs = Intern(*ast->lhs->Eval(this)); |
| 41 | Var* rhs = NULL; |
Shinichiro Hamaji | 4c469b3 | 2015-06-15 19:53:36 +0900 | [diff] [blame] | 42 | bool needs_assign = true; |
Shinichiro Hamaji | 776ca30 | 2015-06-06 03:52:48 +0900 | [diff] [blame] | 43 | switch (ast->op) { |
| 44 | case AssignOp::COLON_EQ: |
| 45 | rhs = new SimpleVar(ast->rhs->Eval(this), origin); |
| 46 | break; |
| 47 | case AssignOp::EQ: |
| 48 | rhs = new RecursiveVar(ast->rhs, origin); |
| 49 | break; |
| 50 | case AssignOp::PLUS_EQ: { |
| 51 | Var* prev = LookupVarInCurrentScope(lhs); |
| 52 | if (!prev->IsDefined()) { |
| 53 | rhs = new RecursiveVar(ast->rhs, origin); |
| 54 | } else { |
Shinichiro Hamaji | 4c469b3 | 2015-06-15 19:53:36 +0900 | [diff] [blame] | 55 | prev->AppendVar(this, ast->rhs); |
| 56 | rhs = prev; |
| 57 | needs_assign = false; |
Shinichiro Hamaji | 776ca30 | 2015-06-06 03:52:48 +0900 | [diff] [blame] | 58 | } |
| 59 | break; |
| 60 | } |
| 61 | case AssignOp::QUESTION_EQ: { |
| 62 | Var* prev = LookupVarInCurrentScope(lhs); |
| 63 | if (!prev->IsDefined()) { |
| 64 | rhs = new RecursiveVar(ast->rhs, origin); |
| 65 | } else { |
| 66 | // TODO |
| 67 | abort(); |
| 68 | } |
| 69 | break; |
| 70 | } |
| 71 | } |
| 72 | |
| 73 | LOG("Assign: %.*s=%s", SPF(lhs), rhs->DebugString().c_str()); |
Shinichiro Hamaji | 4c469b3 | 2015-06-15 19:53:36 +0900 | [diff] [blame] | 74 | if (needs_assign) |
| 75 | vars_->Assign(lhs, rhs); |
Shinichiro Hamaji | 776ca30 | 2015-06-06 03:52:48 +0900 | [diff] [blame] | 76 | } |
| 77 | |
| 78 | void Evaluator::EvalRule(const RuleAST* ast) { |
| 79 | loc_ = ast->loc(); |
| 80 | last_rule_ = NULL; |
| 81 | |
| 82 | shared_ptr<string> expr = ast->expr->Eval(this); |
| 83 | // See semicolon.mk. |
| 84 | if (expr->find_first_not_of(" \t\n;") == string::npos) |
| 85 | return; |
| 86 | |
| 87 | Rule* rule = new Rule; |
| 88 | rule->loc = loc_; |
| 89 | rule->Parse(*expr); |
| 90 | |
| 91 | LOG("Rule: %s", rule->DebugString().c_str()); |
| 92 | rules_.push_back(rule); |
| 93 | last_rule_ = rule; |
| 94 | } |
| 95 | |
| 96 | void Evaluator::EvalCommand(const CommandAST* ast) { |
| 97 | loc_ = ast->loc(); |
| 98 | |
| 99 | if (!last_rule_) { |
| 100 | // TODO: |
| 101 | ERROR("TODO"); |
| 102 | } |
| 103 | |
| 104 | last_rule_->cmds.push_back(ast->expr); |
| 105 | LOG("Command: %s", ast->expr->DebugString().c_str()); |
| 106 | } |
| 107 | |
Shinichiro Hamaji | 42b625f | 2015-06-16 23:07:21 +0900 | [diff] [blame] | 108 | void Evaluator::EvalIf(const IfAST* ast) { |
Shinichiro Hamaji | 7e256df | 2015-06-17 15:33:11 +0900 | [diff] [blame] | 109 | bool is_true; |
| 110 | StringPiece lhs = Intern(*ast->lhs->Eval(this)); |
| 111 | switch (ast->op) { |
| 112 | case CondOp::IFDEF: |
| 113 | case CondOp::IFNDEF: { |
| 114 | Var* v = LookupVarInCurrentScope(lhs); |
| 115 | shared_ptr<string> s = v->Eval(this); |
| 116 | is_true = s->empty() == (ast->op == CondOp::IFNDEF); |
| 117 | break; |
| 118 | } |
| 119 | case CondOp::IFEQ: |
| 120 | case CondOp::IFNEQ: { |
| 121 | ERROR("TODO"); |
| 122 | break; |
| 123 | } |
| 124 | default: |
| 125 | CHECK(false); |
| 126 | } |
| 127 | |
| 128 | const vector<AST*>* asts; |
| 129 | if (is_true) { |
Shinichiro Hamaji | 2847f09 | 2015-06-17 15:48:37 +0900 | [diff] [blame] | 130 | asts = &ast->true_asts; |
Shinichiro Hamaji | 7e256df | 2015-06-17 15:33:11 +0900 | [diff] [blame] | 131 | } else { |
Shinichiro Hamaji | 2847f09 | 2015-06-17 15:48:37 +0900 | [diff] [blame] | 132 | asts = &ast->false_asts; |
Shinichiro Hamaji | 7e256df | 2015-06-17 15:33:11 +0900 | [diff] [blame] | 133 | } |
| 134 | for (AST* a : *asts) { |
Shinichiro Hamaji | 6cb1c25 | 2015-06-17 16:22:51 +0900 | [diff] [blame] | 135 | LOG("%s", a->DebugString().c_str()); |
Shinichiro Hamaji | 7e256df | 2015-06-17 15:33:11 +0900 | [diff] [blame] | 136 | a->Eval(this); |
| 137 | } |
Shinichiro Hamaji | 42b625f | 2015-06-16 23:07:21 +0900 | [diff] [blame] | 138 | } |
| 139 | |
| 140 | void Evaluator::EvalInclude(const IncludeAST* ast) { |
| 141 | ERROR("TODO"); |
| 142 | } |
| 143 | |
| 144 | void Evaluator::EvalExport(const ExportAST* ast) { |
| 145 | ERROR("TODO"); |
| 146 | } |
| 147 | |
Shinichiro Hamaji | 776ca30 | 2015-06-06 03:52:48 +0900 | [diff] [blame] | 148 | Var* Evaluator::LookupVar(StringPiece name) { |
| 149 | // TODO: TSV. |
| 150 | Var* v = vars_->Lookup(name); |
| 151 | if (v->IsDefined()) |
| 152 | return v; |
| 153 | return in_vars_->Lookup(name); |
| 154 | } |
| 155 | |
| 156 | Var* Evaluator::LookupVarInCurrentScope(StringPiece name) { |
| 157 | // TODO: TSV. |
| 158 | Var* v = vars_->Lookup(name); |
| 159 | if (v->IsDefined()) |
| 160 | return v; |
| 161 | return in_vars_->Lookup(name); |
| 162 | } |
| 163 | |
| 164 | EvalResult* Evaluator::GetEvalResult() { |
| 165 | EvalResult* er = new EvalResult; |
| 166 | er->rules.swap(rules_); |
| 167 | er->vars = vars_; |
| 168 | vars_ = NULL; |
| 169 | er->rule_vars.swap(rule_vars_); |
| 170 | return er; |
| 171 | } |
Shinichiro Hamaji | 9619b36 | 2015-06-16 16:13:25 +0900 | [diff] [blame] | 172 | |
| 173 | void Evaluator::Error(const string& msg) { |
Shinichiro Hamaji | 8ee8c37 | 2015-06-16 16:19:40 +0900 | [diff] [blame] | 174 | ERROR("%s:%d: %s", LOCF(loc_), msg.c_str()); |
Shinichiro Hamaji | 9619b36 | 2015-06-16 16:13:25 +0900 | [diff] [blame] | 175 | } |