1 files changed, 76 insertions, 0 deletions
diff --git a/src/nvim/msgpack_rpc/packer.h b/src/nvim/msgpack_rpc/packer.h
new file mode 100644
index 0000000000..8117bd09bd
--- /dev/null
+++ b/src/nvim/msgpack_rpc/packer.h
@@ -0,0 +1,76 @@
+#pragma once
+
+#include <stdbool.h>
+#include <stddef.h>
+#include <stdint.h>
+#include <string.h>
+
+#include "nvim/api/private/defs.h"
+#include "nvim/msgpack_rpc/packer_defs.h"
+
+#define mpack_w(b, byte) *(*(b))++ = (char)(byte);
+static inline void mpack_w2(char **b, uint32_t v)
+{
+  *(*b)++ = (char)((v >> 8) & 0xff);
+  *(*b)++ = (char)(v & 0xff);
+}
+
+static inline void mpack_w4(char **b, uint32_t v)
+{
+  *(*b)++ = (char)((v >> 24) & 0xff);
+  *(*b)++ = (char)((v >> 16) & 0xff);
+  *(*b)++ = (char)((v >> 8) & 0xff);
+  *(*b)++ = (char)(v & 0xff);
+}
+
+static inline void mpack_uint(char **buf, uint32_t val)
+{
+  if (val > 0xffff) {
+    mpack_w(buf, 0xce);
+    mpack_w4(buf, val);
+  } else if (val > 0xff) {
+    mpack_w(buf, 0xcd);
+    mpack_w2(buf, val);
+  } else if (val > 0x7f) {
+    mpack_w(buf, 0xcc);
+    mpack_w(buf, val);
+  } else {
+    mpack_w(buf, val);
+  }
+}
+
+#define mpack_nil(buf) mpack_w(buf, 0xc0)
+static inline void mpack_bool(char **buf, bool val)
+{
+  mpack_w(buf, 0xc2 | (val ? 1 : 0));
+}
+
+static inline void mpack_array(char **buf, uint32_t len)
+{
+  if (len < 0x10) {
+    mpack_w(buf, 0x90 | len);
+  } else if (len < 0x10000) {
+    mpack_w(buf, 0xdc);
+    mpack_w2(buf, len);
+  } else {
+    mpack_w(buf, 0xdd);
+    mpack_w4(buf, len);
+  }
+}
+
+static inline void mpack_map(char **buf, uint32_t len)
+{
+  if (len < 0x10) {
+    mpack_w(buf, 0x80 | len);
+  } else if (len < 0x10000) {
+    mpack_w(buf, 0xde);
+    mpack_w2(buf, len);
+  } else {
+    mpack_w(buf, 0xdf);
+    mpack_w4(buf, len);
+  }
+}
+
+#ifdef INCLUDE_GENERATED_DECLARATIONS
+# include "msgpack_rpc/packer.h.generated.h"
+#endif