From 4c3b2fec322feb8afd23703866d81f1dda51b6ae Mon Sep 17 00:00:00 2001
From: Rose Hogenson <rhogenson@posteo.net>
Date: Sat, 11 Feb 2023 09:41:54 -0800
Subject: Add a bytecode interpreter.

I wrote it in C because I actually like programming in C. Turns out
setting up a Makefile is really easy too.
---
 bytecode/encoding.h | 61 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 61 insertions(+)
 create mode 100644 bytecode/encoding.h

(limited to 'bytecode/encoding.h')

diff --git a/bytecode/encoding.h b/bytecode/encoding.h
new file mode 100644
index 0000000..49357f6
--- /dev/null
+++ b/bytecode/encoding.h
@@ -0,0 +1,61 @@
+#ifndef _ENCODING_H_
+#define _ENCODING_H_
+
+#include <stdbool.h>
+#include <stdint.h>
+
+#include "slice.h"
+#include "value.h"
+
+typedef uint8_t local;
+
+// An arg can be a value or a constant.
+struct arg {
+	local local;
+	value constant;
+};
+
+enum opcode {
+	OALLOC = 1,
+	OCALL = 2,
+	OPOKE = 3,
+	OPEEK = 4,
+	OSHUF = 5,
+	OEXIT = 6,
+};
+
+struct op {
+	enum opcode code;
+	union {
+		struct {
+			local out;
+			struct arg size;
+		} alloc;
+		struct {
+			uint8_t offset;
+			local pointer;
+			struct arg value;
+		} poke;
+		struct {
+			local out;
+			uint8_t offset;
+			struct arg value;
+		} peek;
+		struct {
+			local out;
+			struct arg value;
+		} shuf;
+		struct {
+			struct arg value;
+		} exit;
+	};
+};
+
+struct result {
+	struct op op;
+	int n;
+};
+
+struct result parse(struct slice);
+
+#endif
-- 
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