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.

1 files changed, 61 insertions, 0 deletions

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