Most of a C implementation of jq

c/opcode.c

@@ -0,0 +1,27 @@
+#include "opcode.h"
+
+#define NONE 0
+#define CONSTANT (OP_HAS_IMMEDIATE | OP_HAS_CONSTANT)
+#define VARIABLE (OP_HAS_IMMEDIATE | OP_HAS_VARIABLE)
+#define BRANCH (OP_HAS_IMMEDIATE | OP_HAS_BRANCH)
+#define CFUNC (OP_HAS_IMMEDIATE | OP_HAS_SYMBOL | OP_HAS_CFUNC)
+
+#define OP(name, imm, in, out) \
+  {name, #name, imm, in, out},
+
+static const struct opcode_description opcode_descriptions[] = {
+#include "opcode_list.h"
+};
+
+static const struct opcode_description invalid_opcode_description = {
+  -1, "#INVALID", 0, 0, 0
+};
+
+
+const struct opcode_description* opcode_describe(opcode op) {
+  if ((int)op >= 0 && (int)op < NUM_OPCODES) {
+    return &opcode_descriptions[op];
+  } else {
+    return &invalid_opcode_description;
+  }
+}