From d5d37f1264174b0ae4178a23bced4c497452c0f4 Mon Sep 17 00:00:00 2001
From: Aryadev Chavali <aryadev@aryadevchavali.com>
Date: Sun, 22 Oct 2023 20:23:23 +0100
Subject: Functions which convert (h)words to and from bytes

Uses memcpy internally, so we don't need to care about endianness.
---
 src/base.h |  8 +++++++-
 src/inst.c | 24 ++++++++++++++++++++++++
 2 files changed, 31 insertions(+), 1 deletion(-)

diff --git a/src/base.h b/src/base.h
index 75ae6af..a135061 100644
--- a/src/base.h
+++ b/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
diff --git a/src/inst.c b/src/inst.c
index 74dd736..36156d4 100644
--- a/src/inst.c
+++ b/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;
-- 
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