Avoid memcpy() on copying structure.

src/load.c

@@ -111,22 +111,22 @@ load_rite_header(FILE* fp, rite_binary_header* bin_header, unsigned char* hcrc)
   if (fread(&file_header, 1, sizeof(file_header), fp) < sizeof(file_header)) {
     return MRB_DUMP_READ_FAULT;
   }
-  memcpy(bin_header->rbfi, file_header.rbfi, sizeof(file_header.rbfi));
+  *bin_header->rbfi = *file_header.rbfi;
   if (memcmp(bin_header->rbfi, RITE_FILE_IDENFIFIER, sizeof(bin_header->rbfi)) != 0) {
     return MRB_DUMP_INVALID_FILE_HEADER;    //File identifier error
   }
-  memcpy(bin_header->rbfv, file_header.rbfv, sizeof(file_header.rbfv));
+  *bin_header->rbfv = *file_header.rbfv;
   if (memcmp(bin_header->rbfv, RITE_FILE_FORMAT_VER, sizeof(bin_header->rbfv)) != 0) {
     return MRB_DUMP_INVALID_FILE_HEADER;    //File format version error
   }
-  memcpy(bin_header->risv, file_header.risv, sizeof(file_header.risv));
-  memcpy(bin_header->rct, file_header.rct, sizeof(file_header.rct));
-  memcpy(bin_header->rcv, file_header.rcv, sizeof(file_header.rcv));
+  *bin_header->risv = *file_header.risv;
+  *bin_header->rct = *file_header.rct;
+  *bin_header->rcv = *file_header.rcv;
   hex_to_bin32(bin_header->rbds, file_header.rbds);
   hex_to_bin16(bin_header->nirep, file_header.nirep);
   hex_to_bin16(bin_header->sirep, file_header.sirep);
-  memcpy(bin_header->rsv, file_header.rsv, sizeof(file_header.rsv));
-  memcpy(hcrc, file_header.hcrc, sizeof(file_header.hcrc));
+  *bin_header->rsv = *file_header.rsv;
+  *hcrc = *file_header.hcrc;
 
   return MRB_DUMP_OK;
 }
@@ -267,7 +267,7 @@ mrb_load_irep(mrb_state *mrb, FILE* fp)
 
   dst = rite_dst;
   memset(dst, 0x00, len);
-  memcpy(dst, &bin_header, sizeof(rite_binary_header));
+  *(rite_binary_header *)dst = bin_header;
   dst += sizeof(rite_binary_header);
   dst += hex_to_bin16(dst, hcrc);
 
@@ -302,7 +302,7 @@ read_rite_header(mrb_state *mrb, unsigned char *bin, rite_binary_header*  bin_he
 {
   uint16_t crc;
 
-  memcpy(bin_header, bin, sizeof(rite_binary_header));
+  *bin_header = *(rite_binary_header *)bin;
   bin += sizeof(rite_binary_header);
   if (memcmp(bin_header->rbfi, RITE_FILE_IDENFIFIER, sizeof(bin_header->rbfi)) != 0) {
     return MRB_DUMP_INVALID_FILE_HEADER;    //File identifier error