Prepare skeleton for bytecode interpreter

1 files changed, 32 insertions, 0 deletions

diff --git a/src/bytecode/debug.h b/src/bytecode/debug.h
new file mode 100644
index 0000000..3d08d8f
--- /dev/null
+++ b/src/bytecode/debug.h
@@ -0,0 +1,32 @@
+#ifndef BDL_DEBUG_H
+#define BDL_DEBUG_H
+
+void disassemble_chunk(u8 *chunk, const char *name);
+size_t disassemble_instruction(u8 *chunk, size_t offset);
+
+void
+disassemble_chunk(u8 *chunk, const char *name) {
+    printf("== %s ==\n", name);
+    size_t offset = 0;
+    while (offset < array_size(chunk)) {
+        offset = disassemble_instruction(chunk, offset);
+    }
+}
+
+size_t
+disassemble_instruction(u8 *chunk, size_t offset) {
+    printf("%04ld ", offset);
+    u8 instruction = chunk[offset];
+    switch (instruction) {
+        case OP_RETURN: {
+            printf("OP_RETURN\n");
+            return offset + 1;
+        } break;
+        default: {
+            printf("Unknown OP: %d\n", instruction);
+            return offset + 1;
+        } break;
+    }
+}
+
+#endif // BDL_DEBUG_H