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3148e13 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 | // Copyright 2011 Google Inc. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include <assert.h>
#include "eval_env.h"
using namespace std;
string BindingEnv::LookupVariable(const string& var) {
map<string, string>::iterator i = bindings_.find(var);
if (i != bindings_.end())
return i->second;
if (parent_)
return parent_->LookupVariable(var);
return "";
}
void BindingEnv::AddBinding(const string& key, const string& val) {
bindings_[key] = val;
}
void BindingEnv::AddRule(std::unique_ptr<const Rule> rule) {
assert(LookupRuleCurrentScope(rule->name()) == NULL);
rules_[rule->name()] = std::move(rule);
}
const Rule* BindingEnv::LookupRuleCurrentScope(const string& rule_name) {
auto i = rules_.find(rule_name);
if (i == rules_.end())
return NULL;
return i->second.get();
}
const Rule* BindingEnv::LookupRule(const string& rule_name) {
auto i = rules_.find(rule_name);
if (i != rules_.end())
return i->second.get();
if (parent_)
return parent_->LookupRule(rule_name);
return NULL;
}
void Rule::AddBinding(const string& key, const EvalString& val) {
bindings_[key] = val;
}
const EvalString* Rule::GetBinding(const string& key) const {
Bindings::const_iterator i = bindings_.find(key);
if (i == bindings_.end())
return NULL;
return &i->second;
}
std::unique_ptr<Rule> Rule::Phony() {
auto rule = std::unique_ptr<Rule>(new Rule("phony"));
rule->phony_ = true;
return rule;
}
bool Rule::IsPhony() const {
return phony_;
}
// static
bool Rule::IsReservedBinding(const string& var) {
return var == "command" ||
var == "depfile" ||
var == "dyndep" ||
var == "description" ||
var == "deps" ||
var == "generator" ||
var == "pool" ||
var == "restat" ||
var == "rspfile" ||
var == "rspfile_content" ||
var == "msvc_deps_prefix";
}
const map<string, std::unique_ptr<const Rule>>& BindingEnv::GetRules() const {
return rules_;
}
string BindingEnv::LookupWithFallback(const string& var,
const EvalString* eval,
Env* env) {
map<string, string>::iterator i = bindings_.find(var);
if (i != bindings_.end())
return i->second;
if (eval)
return eval->Evaluate(env);
if (parent_)
return parent_->LookupVariable(var);
return "";
}
string EvalString::Evaluate(Env* env) const {
if (parsed_.empty()) {
return single_token_;
}
string result;
for (TokenList::const_iterator i = parsed_.begin(); i != parsed_.end(); ++i) {
if (i->second == RAW)
result.append(i->first);
else
result.append(env->LookupVariable(i->first));
}
return result;
}
void EvalString::AddText(StringPiece text) {
if (parsed_.empty()) {
single_token_.append(text.begin(), text.end());
} else if (!parsed_.empty() && parsed_.back().second == RAW) {
parsed_.back().first.append(text.begin(), text.end());
} else {
parsed_.push_back(std::make_pair(text.AsString(), RAW));
}
}
void EvalString::AddSpecial(StringPiece text) {
if (parsed_.empty() && !single_token_.empty()) {
// Going from one to two tokens, so we can no longer apply
// our single_token_ optimization and need to push everything
// onto the vector.
parsed_.push_back(std::make_pair(std::move(single_token_), RAW));
}
parsed_.push_back(std::make_pair(text.AsString(), SPECIAL));
}
string EvalString::Serialize() const {
string result;
if (parsed_.empty() && !single_token_.empty()) {
result.append("[");
result.append(single_token_);
result.append("]");
} else {
for (const auto& pair : parsed_) {
result.append("[");
if (pair.second == SPECIAL)
result.append("$");
result.append(pair.first.begin(), pair.first.end());
result.append("]");
}
}
return result;
}
string EvalString::Unparse() const {
string result;
if (parsed_.empty() && !single_token_.empty()) {
result.append(single_token_.begin(), single_token_.end());
} else {
for (TokenList::const_iterator i = parsed_.begin();
i != parsed_.end(); ++i) {
bool special = (i->second == SPECIAL);
if (special)
result.append("${");
result.append(i->first.begin(), i->first.end());
if (special)
result.append("}");
}
}
return result;
}
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