Simplify Env code by reusing QProcessEnvironment.

This gets rid of the custom parse code and slims down the API.

https://github.com/ariya/phantomjs/issues/12424

src/env.cpp

@@ -32,6 +32,7 @@
 #include <QCoreApplication>
 #include <QString>
 #include <QVariantMap>
+#include <QProcessEnvironment>
 
 static Env *env_instance = NULL;
 
@@ -46,35 +47,14 @@ Env *Env::instance()
 Env::Env()
     : QObject(QCoreApplication::instance())
 {
+    const QProcessEnvironment &env = QProcessEnvironment::systemEnvironment();
+    foreach(const QString &key, env.keys()) {
+        m_map[key] = env.value(key);
+    }
 }
 
 // public:
 
-void Env::parse(const char **envp)
-{
-    const char **env = (const char **)NULL;
-    QString envvar, name, value;
-    int indexOfEquals;
-    // Loop for each of the <NAME>=<VALUE> pairs and split them into a map
-    for (env = envp; *env != (const char *)NULL; env++) {
-        envvar = QString(*env);
-        indexOfEquals = envvar.indexOf('=');
-        if (0 >= indexOfEquals) {
-            // Should never happen because names cannot contain "=" and cannot
-            // be empty. If it does happen, then just ignore this record.
-            // See: http://pubs.opengroup.org/onlinepubs/009695399/basedefs/xbd_chap08.html
-            continue;
-        }
-        // Extract name and value (if it exists) from envvar
-        // NOTE:
-        //  QString::mid() will gracefully return an empty QString when the
-        //  specified position index is >= the length() of the string
-        name = envvar.left(indexOfEquals);
-        value = envvar.mid(indexOfEquals + 1);
-        m_map.insert(name, value);
-    }
-}
-
 QVariantMap Env::asVariantMap() const
 {
     return m_map;

src/env.h

@@ -40,7 +40,6 @@ class Env : public QObject
 public:
     static Env *instance();
 
-    void parse(const char ** envp);
     QVariantMap asVariantMap() const;
 
 private:

src/main.cpp

@@ -54,7 +54,7 @@ static google_breakpad::ExceptionHandler* eh;
 #error Something is wrong with the setup. Please report to the mailing list!
 #endif
 
-int main(int argc, char** argv, const char** envp)
+int main(int argc, char** argv)
 {
     // Setup Google Breakpad exception handler
 #ifdef Q_OS_LINUX
@@ -91,9 +91,6 @@ int main(int argc, char** argv, const char** envp)
     app.setOrganizationDomain("www.ofilabs.com");
     app.setApplicationVersion(PHANTOMJS_VERSION_STRING);
 
-    // Prepare the "env" singleton using the environment variables
-    Env::instance()->parse(envp);
-
     // Registering an alternative Message Handler
     qInstallMessageHandler(Utils::messageHandler);