Functions which convert (h)words to and from bytes

Uses memcpy internally, so we don't need to care about endianness.

src/base.h

@@ -55,6 +55,12 @@ typedef enum
 
 #define HWORD_SIZE sizeof(hword)
 #define WORD_SIZE  sizeof(word)
-#define FLOAT_SIZE sizeof(f64)
+
+// Assume array contains 4 bytes.
+hword convert_bytes_to_hword(byte *);
+void convert_hword_to_bytes(hword, byte *);
+// Assume array contains 8 bytes.
+word convert_bytes_to_word(byte *);
+void convert_word_to_bytes(word, byte *);
 
 #endif

src/inst.c

@@ -129,6 +129,30 @@ void data_print(data_t datum, data_type_t type, FILE *fp)
   }
 }
 
+hword convert_bytes_to_hword(byte *bytes)
+{
+  hword h = 0;
+  memcpy(&h, bytes, HWORD_SIZE);
+  return h;
+}
+
+void convert_hword_to_bytes(hword w, byte *bytes)
+{
+  memcpy(bytes, &w, HWORD_SIZE);
+}
+
+void convert_word_to_bytes(word w, byte *bytes)
+{
+  memcpy(bytes, &w, WORD_SIZE);
+}
+
+word convert_bytes_to_word(byte *bytes)
+{
+  word w = 0;
+  memcpy(&w, bytes, WORD_SIZE);
+  return w;
+}
+
 data_type_t get_opcode_data_type(opcode_t opcode)
 {
   data_type_t type = DATA_TYPE_NIL;