X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~yarrgweb/git?p=ypp-sc-tools.web-live.git;a=blobdiff_plain;f=yarrg%2Frscommon.h;h=0933e0fecc9565b2368ebb0d3f4b55284aff5f6b;hp=bdcc15759705bb5667d26583bdbd63315536d642;hb=706d75804688b94f51b806adc44f10269c35b0db;hpb=4ed298fb2ac975783ad1a350659f5ae22825e24e

diff --git a/yarrg/rscommon.h b/yarrg/rscommon.h
index bdcc157..0933e0f 100644
--- a/yarrg/rscommon.h
+++ b/yarrg/rscommon.h
@@ -163,5 +163,15 @@ static inline int isle2arch(int isle) {
   return arch;
 }
 
+static inline int route2midarch(const int *ports, int nports) {
+  int archs[nports], last_arch=-1, narchs=0, i;
+  for (i=0; i<nports; i++) {
+    int arch= isle2arch(ports[i]);
+    if (arch==last_arch) continue;
+    archs[narchs++]= last_arch= arch;
+  }
+  return archs[narchs/2];
+}
+
 
 #endif /*RSCOMMON_H*/