From e8537f4b5246ac61bdbc11602fc802a288198555 Mon Sep 17 00:00:00 2001
From: Tau <tau@nowhere>
Date: Thu, 8 Nov 2018 14:17:59 -0500
Subject: [PATCH] jvs/jvs-bus.c: Add JVS bus definitions

---
 jvs/jvs-bus.c   | 30 ++++++++++++++++++++++++++++++
 jvs/jvs-bus.h   | 24 ++++++++++++++++++++++++
 jvs/meson.build |  2 ++
 3 files changed, 56 insertions(+)
 create mode 100644 jvs/jvs-bus.c
 create mode 100644 jvs/jvs-bus.h

diff --git a/jvs/jvs-bus.c b/jvs/jvs-bus.c
new file mode 100644
index 0000000..8961b84
--- /dev/null
+++ b/jvs/jvs-bus.c
@@ -0,0 +1,30 @@
+#include <assert.h>
+#include <stdbool.h>
+#include <stddef.h>
+
+#include "jvs/jvs-bus.h"
+
+void jvs_bus_transact(
+        struct jvs_node *head,
+        const void *bytes,
+        size_t nbytes,
+        struct iobuf *resp)
+{
+    struct jvs_node *node;
+
+    assert(bytes != NULL);
+    assert(resp != NULL);
+
+    for (node = head ; node != NULL ; node = node->next) {
+        node->transact(node, bytes, nbytes, resp);
+    }
+}
+
+bool jvs_node_sense(struct jvs_node *node)
+{
+    if (node != NULL) {
+        return node->sense(node);
+    } else {
+        return false;
+    }
+}
diff --git a/jvs/jvs-bus.h b/jvs/jvs-bus.h
new file mode 100644
index 0000000..820ba20
--- /dev/null
+++ b/jvs/jvs-bus.h
@@ -0,0 +1,24 @@
+#pragma once
+
+#include <stdbool.h>
+#include <stddef.h>
+
+#include "hook/iobuf.h"
+
+struct jvs_node {
+    struct jvs_node *next;
+    void (*transact)(
+            struct jvs_node *node,
+            const void *bytes,
+            size_t nbytes,
+            struct iobuf *resp);
+    bool (*sense)(struct jvs_node *node);
+};
+
+void jvs_bus_transact(
+        struct jvs_node *head,
+        const void *bytes,
+        size_t nbytes,
+        struct iobuf *resp);
+
+bool jvs_node_sense(struct jvs_node *node);
diff --git a/jvs/meson.build b/jvs/meson.build
index a8854fe..f39045a 100644
--- a/jvs/meson.build
+++ b/jvs/meson.build
@@ -7,5 +7,7 @@ jvs_lib = static_library(
         capnhook.get_variable('hook_dep'),
     ],
     sources : [
+        'jvs-bus.c',
+        'jvs-bus.h',
     ],
 )