1 files changed, 33 insertions, 0 deletions
diff --git a/fixed.h b/fixed.h
new file mode 100644
index 0000000..0ff27b2
--- /dev/null
+++ b/fixed.h
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+/* Stuff specific to the CCSDS (255,223) RS codec
+ * (255,223) code over GF(256). Note: the conventional basis is still
+ * used; the dual-basis mappings are performed in [en|de]code_rs_ccsds.c
+ *
+ * Copyright 2003 Phil Karn, KA9Q
+ * May be used under the terms of the GNU Lesser General Public License (LGPL)
+ */
+typedef unsigned char data_t;
+
+static inline int mod255(int x){
+  while (x >= 255) {
+    x -= 255;
+    x = (x >> 8) + (x & 255);
+  }
+  return x;
+}
+#define MODNN(x) mod255(x)
+
+extern data_t CCSDS_alpha_to[];
+extern data_t CCSDS_index_of[];
+extern data_t CCSDS_poly[];
+
+#define MM 8
+#define NN 255
+#define ALPHA_TO CCSDS_alpha_to
+#define INDEX_OF CCSDS_index_of
+#define GENPOLY CCSDS_poly
+#define NROOTS 32
+#define FCR 112
+#define PRIM 11
+#define IPRIM 116
+#define PAD pad
+