+ bool env_vector::present (const std::string& name) const\r
+ {\r
+ unsigned i = 0;\r
+ while(m_env[i])\r
+ {\r
+ std::string current_name;\r
+ std::string current_value;\r
+ envp_extract(current_name, current_value, m_env, i);\r
+ if (envp_equal(name,current_name))\r
+ return true;\r
+ }\r
+ return false;\r
+ }\r
+\r