Add editing langset feature.

The syntax to add any langset to the langset table looks like:

<match target="scan">
    <test name="family">
        <string>Buggy Sans</string>
    </test>
    <edit name="lang" mode="assign">
        <plus>
            <name>lang</name>
            <langset>
                <string>zh-cn</string>
                <string>zh-tw</string>
            </langset>
        </plus>
    </edit>
</match>

To remove any langset from the langset table:

<match target="scan">
    <test name="family">
        <string>Buggy Sans</string>
    </test>
    <edit name="lang" mode="assign">
        <minus>
            <name>lang</name>
            <langset>
                <string>ja</string>
            </langset>
        </minus>
    </edit>
</match>

1 files changed, 6 insertions, 0 deletions

diff --git a/src/fcdbg.c b/src/fcdbg.c
index 79e19534..cf2ff087 100644
--- a/src/fcdbg.c
+++ b/src/fcdbg.c
@@ -163,6 +163,7 @@ FcOpPrint (FcOp op)
     case FcOpRange: printf ("Range"); break;
     case FcOpBool: printf ("Bool"); break;
     case FcOpCharSet: printf ("CharSet"); break;
+    case FcOpLangSet: printf ("LangSet"); break;
     case FcOpField: printf ("Field"); break;
     case FcOpConst: printf ("Const"); break;
     case FcOpAssign: printf ("Assign"); break;
@@ -214,6 +215,11 @@ FcExprPrint (const FcExpr *expr)
     case FcOpRange: break;
     case FcOpBool: printf ("%s", expr->u.bval ? "true" : "false"); break;
     case FcOpCharSet: printf ("charset\n"); break;
+    case FcOpLangSet:
+	printf ("langset:");
+	FcLangSetPrint(expr->u.lval);
+	printf ("\n");
+	break;
     case FcOpNil: printf ("nil\n"); break;
     case FcOpField: printf ("%s", FcObjectName(expr->u.object)); break;
     case FcOpConst: printf ("%s", expr->u.constant); break;