29   bool GetVar(StringPiece variable_name, std::string* result) override {  in GetVar()  argument
30     if (GetVarImpl(variable_name, result))  in GetVar()
37     char first_char = variable_name[0];  in GetVar()
40       alternate_case_var = ToUpperASCII(variable_name);  in GetVar()
42       alternate_case_var = ToLowerASCII(variable_name);  in GetVar()
48   bool SetVar(StringPiece variable_name,  in SetVar()  argument
50     return SetVarImpl(variable_name, new_value);  in SetVar()
53   bool UnSetVar(StringPiece variable_name) override {  in UnSetVar()  argument
54     return UnSetVarImpl(variable_name);  in UnSetVar()
58   bool GetVarImpl(StringPiece variable_name, std::string* result) {  in GetVarImpl()  argument
61         ::GetEnvironmentVariable(UTF8ToWide(variable_name).c_str(), nullptr, 0);  in GetVarImpl()
66       ::GetEnvironmentVariable(UTF8ToWide(variable_name).c_str(), value.get(),  in GetVarImpl()
72     const char* env_value = getenv(variable_name.data());  in GetVarImpl()
82   bool SetVarImpl(StringPiece variable_name, const std::string& new_value) {  in SetVarImpl()  argument
85     return !!SetEnvironmentVariable(UTF8ToWide(variable_name).c_str(),  in SetVarImpl()
89     return !setenv(variable_name.data(), new_value.c_str(), 1);  in SetVarImpl()
93   bool UnSetVarImpl(StringPiece variable_name) {  in UnSetVarImpl()  argument
96     return !!SetEnvironmentVariable(UTF8ToWide(variable_name).c_str(), nullptr);  in UnSetVarImpl()
99     return !unsetenv(variable_name.data());  in UnSetVarImpl()
140 bool Environment::HasVar(StringPiece variable_name) {  in HasVar()  argument
141   return GetVar(variable_name, nullptr);  in HasVar()