1 files changed, 36 insertions, 0 deletions
diff --git a/lpg/libqr/code-common.c b/lpg/libqr/code-common.c
new file mode 100644
index 0000000..08b16df
--- /dev/null
+++ b/lpg/libqr/code-common.c
@@ -0,0 +1,36 @@
+#include <stdlib.h>
+#include <qr/code.h>
+
+#include "code-common.h"
+
+void qr_code_destroy(struct qr_code * code)
+{
+        free(code->modules);
+        free(code);
+}
+
+int qr_code_width(const struct qr_code * code)
+{
+        return code_side_length(code->format);
+}
+
+int code_side_length(int format)
+{
+        return format * 4 + 17;
+}
+
+int code_finder_count(int format)
+{
+        int x = format / 7;
+        return format > 1 ? x*x + 4*x + 1 : 0;        
+}
+
+size_t code_total_capacity(int format)
+{
+        /* XXX: figure out the "correct" formula */
+        return 160
+             +  25 * code_finder_count(format)
+             -  10 * (format / 7)
+             +   2 * code_side_length(format);
+}
+