add channel header

channel.h

@@ -0,0 +1,54 @@
+#ifndef CHANNEL_HEADER_HH
+#define CHANNEL_HEADER_HH
+
+#include <cstdint>
+#include <cstdlib>
+
+class Channel {
+   uint32_t id;
+   uint32_t size;
+   uint32_t version;
+   int32_t integral[3];
+   uint32_t crossing;
+   uint32_t block_count;
+   uint32_t spill;
+   char * block_data;
+   bool valid;
+   public:
+   Channel(char const * ptr, size_t len);
+   void Print();
+
+};
+Channel::Channel(char const * ptr, size_t len) {
+   valid = true;
+   uint32_t * wordData = (uint32_t *)ptr;
+   size = ((wordData[0] & 0xFFFFFF00) >> 8) * sizeof(uint32_t);
+   if (size != len) valid = false;
+
+   version = wordData[0] && 0xFF;
+   if (version != 0x1) valid = false;
+
+   for (int i = 0; i < 3; i++) 
+      integral[i] = (wordData[i + 1] & 0xFFFFFF00)>>8;
+
+   crossing = wordData[4] & 0x00FFFFFF;
+   block_count = (wordData[5] &0xFF000000) >> 24;
+   id = (wordData[5] & 0x00FF0000) >> 16;
+   spill = (wordData[5] & 0x0000FFFF);
+   if ((id > 8) || (id < 1)) {
+      valid = false;
+   }
+
+}
+
+#include <iostream>
+void Channel::Print(){
+   if (valid) {
+      printf("channel %u, spill %u, size %u, blocks %u, crossing %u, integrals %d, %d, %d\n",
+            id, spill, size, block_count, crossing, integral[0], integral[1], integral[2]);
+   }
+   else {
+      printf("Invalid channel\n");
+   }
+}
+#endif /* end of include guard */