1 files changed, 73 insertions, 0 deletions
diff --git a/FICS/rating_conv.c b/FICS/rating_conv.c
new file mode 100644
index 0000000..553b4b0
--- /dev/null
+++ b/FICS/rating_conv.c
@@ -0,0 +1,73 @@
+/* Ratings conversions by DAV */
+/* GNU licensing applies */
+
+#include "rating_conv.h"
+#include "common.h"
+#include "stdinclude.h"
+#include "command.h"
+#include "utils.h"
+
+PRIVATE int elo_to_uscf(int elo)
+{
+  return elo + 100;
+}
+
+PRIVATE int uscf_to_elo(int uscf)
+{
+  return uscf - 100;
+}
+
+PRIVATE int bcf_to_elo(int bcf)
+{
+  return bcf * 8 + 600;
+}
+
+PRIVATE int elo_to_bcf(int elo)
+{
+  return (elo - 600) / 8;
+}
+
+PRIVATE int uscf_to_bcf(int uscf)
+{
+  return (uscf - 700) / 8;
+}
+
+PRIVATE int bcf_to_uscf(int bcf)
+{
+  return bcf * 8 + 700;
+}
+
+PRIVATE void printgrades(int p, int elo, int uscf, int bcf)
+{
+  pprintf(p, "Grading conversion:\n");
+  pprintf(p, "  ELO = %d, USCF = %d, BCF = %d\n", elo, uscf, bcf);
+}
+
+PUBLIC int com_CONVERT_BCF(int p, param_list param)
+{
+  int elo = bcf_to_elo(param[0].val.integer);
+  int uscf = elo_to_uscf(elo);
+
+  printgrades(p, elo, uscf, param[0].val.integer);
+  return COM_OK;
+}
+
+PUBLIC int com_CONVERT_ELO(int p, param_list param)
+{
+  int bcf = elo_to_bcf(param[0].val.integer);
+  int uscf = elo_to_uscf(param[0].val.integer);
+
+  printgrades(p, param[0].val.integer, uscf, bcf);
+  return COM_OK;
+}
+
+
+PUBLIC int com_CONVERT_USCF(int p, param_list param)
+{
+  int elo = uscf_to_elo(param[0].val.integer);
+  int bcf = elo_to_bcf(elo);
+
+  printgrades(p, elo, param[0].val.integer, bcf);
+  return COM_OK;
+}
+