1 files changed, 93 insertions, 0 deletions
diff --git a/core/upb_stream_vtbl.h b/core/upb_stream_vtbl.h
new file mode 100644
index 0000000..0ec45d2
--- /dev/null
+++ b/core/upb_stream_vtbl.h
@@ -0,0 +1,93 @@
+/*
+ * upb - a minimalist implementation of protocol buffers.
+ *
+ * vtable declarations for types that are implementing any of the src or sink
+ * interfaces.  Only components that are implementing these interfaces need
+ * to worry about this file.
+ *
+ * Copyright (c) 2010 Joshua Haberman.  See LICENSE for details.
+ */
+
+#ifndef UPB_SRCSINK_VTBL_H_
+#define UPB_SRCSINK_VTBL_H_
+
+#include "upb.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+struct upb_src;
+typedef struct upb_src upb_src;
+struct upb_sink;
+typedef struct upb_sink upb_sink;
+struct upb_bytesrc;
+typedef struct upb_bytesrc upb_bytesrc;
+struct upb_bytesink;
+typedef struct upb_bytesink upb_bytesink;
+
+// Typedefs for function pointers to all of the virtual functions.
+typedef struct _upb_fielddef (*upb_src_getdef_fptr)(upb_src *src);
+typedef bool (*upb_src_getval_fptr)(upb_src *src, upb_valueptr val);
+typedef bool (*upb_src_skipval_fptr)(upb_src *src);
+typedef bool (*upb_src_startmsg_fptr)(upb_src *src);
+typedef bool (*upb_src_endmsg_fptr)(upb_src *src);
+
+typedef bool (*upb_sink_putdef_fptr)(upb_sink *sink, struct _upb_fielddef *def);
+typedef bool (*upb_sink_putval_fptr)(upb_sink *sink, upb_value val);
+typedef bool (*upb_sink_startmsg_fptr)(upb_sink *sink);
+typedef bool (*upb_sink_endmsg_fptr)(upb_sink *sink);
+
+typedef upb_string *(*upb_bytesrc_get_fptr)(upb_bytesrc *src);
+typedef void (*upb_bytesrc_recycle_fptr)(upb_bytesrc *src, upb_string *str);
+typedef bool (*upb_bytesrc_append_fptr)(
+    upb_bytesrc *src, upb_string *str, upb_strlen_t len);
+
+typedef int32_t (*upb_bytesink_put_fptr)(upb_bytesink *sink, upb_string *str);
+
+// Vtables for the above interfaces.
+typedef struct {
+  upb_src_getdef_fptr   getdef;
+  upb_src_getval_fptr   getval;
+  upb_src_skipval_fptr  skipval;
+  upb_src_startmsg_fptr startmsg;
+  upb_src_endmsg_fptr   endmsg;
+} upb_src_vtable;
+
+typedef struct {
+  upb_bytesrc_get_fptr     get;
+  upb_bytesrc_append_fptr  append;
+  upb_bytesrc_recycle_fptr recycle;
+} upb_bytesrc_vtable;
+
+// "Base Class" definitions; components that implement these interfaces should
+// contain one of these structures.
+
+struct upb_src {
+  upb_src_vtable *vtbl;
+  upb_status status;
+  bool eof;
+#ifndef NDEBUG
+  int state;  // For debug-mode checking of API usage.
+#endif
+};
+
+struct upb_bytesrc {
+  upb_bytesrc_vtable *vtbl;
+  upb_status status;
+  bool eof;
+};
+
+INLINE void upb_src_init(upb_src *s, upb_src_vtable *vtbl) {
+  s->vtbl = vtbl;
+  s->eof = false;
+#ifndef DEBUG
+  // TODO: initialize debug-mode checking.
+#endif
+}
+
+#ifdef __cplusplus
+}  /* extern "C" */
+#endif
+
+#endif