Add charset editing feature.

The syntax to add any characters to the charset table looks like:

<match target="scan">
    <test name="family">
        <string>Buggy Sans</string>
    </test>
    <edit name="charset" mode="assign">
        <plus>
            <name>charset</name>
            <charset>
                <int>0x3220</int>    <!-- PARENTHESIZED IDEOGRAPH ONE -->
            </charset>
        </plus>
    </edit>
</match>

To remove any characters from the charset table:

<match target="scan">
    <test name="family">
        <string>Buggy Sans</string>
    </test>
    <edit name="charset" mode="assign">
        <minus>
            <name>charset</name>
            <charset>
                <int>0x06CC</int>    <!-- ARABIC LETTER FARSI YEH -->
                <int>0x06D2</int>    <!-- ARABIC LETTER YEH BARREE -->
                <int>0x06D3</int>    <!-- ARABIC LETTER YEH BARREE WITH HAMZA ABOVE -->
            </charset>
        </minus>
    </edit>
</match>

You could also use the range element for convenience:

...
            <charset>
                <int>0x06CC</int>    <!-- ARABIC LETTER FARSI YEH -->
                <range>
                    <int>0x06D2</int>    <!-- ARABIC LETTER YEH BARREE -->
                    <int>0x06D3</int>    <!-- ARABIC LETTER YEH BARREE WITH HAMZA ABOVE -->
                </range>
            </charset>
...

1 files changed, 2 insertions, 0 deletions

diff --git a/src/fcdbg.c b/src/fcdbg.c
index fc3b5960..79e19534 100644
--- a/src/fcdbg.c
+++ b/src/fcdbg.c
@@ -160,6 +160,7 @@ FcOpPrint (FcOp op)
     case FcOpDouble: printf ("Double"); break;
     case FcOpString: printf ("String"); break;
     case FcOpMatrix: printf ("Matrix"); break;
+    case FcOpRange: printf ("Range"); break;
     case FcOpBool: printf ("Bool"); break;
     case FcOpCharSet: printf ("CharSet"); break;
     case FcOpField: printf ("Field"); break;
@@ -210,6 +211,7 @@ FcExprPrint (const FcExpr *expr)
 			      expr->u.mval->xy,
 			      expr->u.mval->yx,
 			      expr->u.mval->yy); break;
+    case FcOpRange: break;
     case FcOpBool: printf ("%s", expr->u.bval ? "true" : "false"); break;
     case FcOpCharSet: printf ("charset\n"); break;
     case FcOpNil: printf ("nil\n"); break;