libcore: Added method for processing all command line option parameters

skyjake · Jan 6, 2017 · 6bfd747 · 6bfd747
1 parent 13d94f1
commit 6bfd747
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diff --git a/doomsday/sdk/libcore/include/de/core/commandline.h b/doomsday/sdk/libcore/include/de/core/commandline.h
@@ -127,6 +127,19 @@ class DENG2_PUBLIC CommandLine
      */
     ArgWithParams check(String const &arg, dint count = 0) const;
 
+    /**
+     * Calls a callback function for each of the parameters given to an argumnet.
+     * If there are multiple @a arg options found, all of the parameters given
+     * to each option get called in order.
+     *
+     * @param arg  Argument to look for. Don't use aliases here.
+     * @param paramHandler  Callback for the parameters.
+     *
+     * @return Number of parameters handled.
+     */
+    int forAllParameters(String const &arg,
+                         std::function<void (duint, String const &)> paramHandler) const;
+
     /**
      * Gets the parameter for an argument.
      *

diff --git a/doomsday/sdk/libcore/src/core/commandline.cpp b/doomsday/sdk/libcore/src/core/commandline.cpp
@@ -210,6 +210,35 @@ CommandLine::ArgWithParams CommandLine::check(String const &arg, dint numParams)
     return found;
 }
 
+int CommandLine::forAllParameters(String const &arg,
+                                  std::function<void (duint, String const &)> paramHandler) const
+{
+    int total = 0;
+    bool inside = false;
+
+    for (Impl::Arguments::const_iterator i = d->arguments.begin();
+         i != d->arguments.end(); ++i)
+    {
+        if (matches(arg, *i))
+        {
+            inside = true;
+        }
+        else if (inside)
+        {
+            if (isOption(*i))
+            {
+                inside = false;
+            }
+            else
+            {
+                paramHandler(i - d->arguments.begin(), *i);
+                ++total;
+            }
+        }
+    }
+    return total;
+}
+
 bool CommandLine::getParameter(String const &arg, String &param) const
 {
     dint pos = check(arg, 1);