1 files changed, 115 insertions, 0 deletions
diff --git a/src/emscripten-helpers.cc b/src/emscripten-helpers.cc
new file mode 100644
index 00000000..4e8d92f6
--- /dev/null
+++ b/src/emscripten-helpers.cc
@@ -0,0 +1,115 @@
+/*
+ * Copyright 2016 WebAssembly Community Group participants
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef WABT_EMSCRIPTEN_HELPERS_H_
+#define WABT_EMSCRIPTEN_HELPERS_H_
+
+#include <stddef.h>
+
+#include "ast.h"
+#include "binary-reader.h"
+#include "binary-writer.h"
+#include "common.h"
+#include "stream.h"
+#include "writer.h"
+
+/* TODO(binji): it would be nicer to generate this as static data, but it's not
+ * currently easy to do. Maybe use LLVM's python bindings for this? */
+
+#define DEFINE_SIZEOF(Name, name) \
+  size_t wabt_sizeof_##name(void) { return sizeof(Name); }
+
+#define DEFINE_OFFSETOF(Name, name, member)      \
+  size_t wabt_offsetof_##name##_##member(void) { \
+    return offsetof(Name, member);               \
+  }
+
+/* See http://stackoverflow.com/a/1872506 */
+#define CONCAT(a, b) CONCAT_(a, b)
+#define CONCAT_(a, b) CONCAT__(a, b)
+#define CONCAT__(a, b) a##b
+#define FOREACH_1(m, S, s, x, ...) m(S, s, x)
+#define FOREACH_2(m, S, s, x, ...) m(S, s, x) FOREACH_1(m, S, s, __VA_ARGS__)
+#define FOREACH_3(m, S, s, x, ...) m(S, s, x) FOREACH_2(m, S, s, __VA_ARGS__)
+#define FOREACH_4(m, S, s, x, ...) m(S, s, x) FOREACH_3(m, S, s, __VA_ARGS__)
+#define FOREACH_5(m, S, s, x, ...) m(S, s, x) FOREACH_4(m, S, s, __VA_ARGS__)
+#define FOREACH_6(m, S, s, x, ...) m(S, s, x) FOREACH_5(m, S, s, __VA_ARGS__)
+#define FOREACH_7(m, S, s, x, ...) m(S, s, x) FOREACH_6(m, S, s, __VA_ARGS__)
+#define FOREACH_8(m, S, s, x, ...) m(S, s, x) FOREACH_7(m, S, s, __VA_ARGS__)
+#define NARG(...) NARG_(__VA_ARGS__, RSEQ_N())
+#define NARG_(...) ARG_N(__VA_ARGS__)
+#define ARG_N(_1, _2, _3, _4, _5, _6, _7, _8, N, ...) N
+#define RSEQ_N() 8, 7, 6, 5, 4, 3, 2, 1, 0
+#define FOREACH(m, S, s, ...) FOREACH_(NARG(__VA_ARGS__), m, S, s, __VA_ARGS__)
+#define FOREACH_(N, m, S, s, ...) CONCAT(FOREACH_, N)(m, S, s, __VA_ARGS__)
+#define DEFINE_STRUCT0(Name, name) DEFINE_SIZEOF(Name, name)
+#define DEFINE_STRUCT(Name, name, ...) \
+  DEFINE_SIZEOF(Name, name)            \
+  FOREACH(DEFINE_OFFSETOF, Name, name, __VA_ARGS__)
+
+WABT_EXTERN_C_BEGIN
+
+/* clang-format off */
+DEFINE_STRUCT(
+    WabtBinaryErrorHandler, binary_error_handler,
+    on_error, user_data)
+
+DEFINE_STRUCT(
+    WabtLocation, location,
+    filename, line, first_column, last_column)
+
+DEFINE_STRUCT(
+    WabtMemoryWriter, memory_writer,
+    base, buf)
+
+DEFINE_STRUCT0(
+    WabtModule, module)
+
+DEFINE_STRUCT(
+    WabtOutputBuffer, output_buffer,
+    start, size, capacity)
+
+DEFINE_STRUCT(
+    WabtReadBinaryOptions, read_binary_options,
+    read_debug_names)
+
+DEFINE_STRUCT0(
+    WabtScript, script)
+
+DEFINE_STRUCT(
+    WabtSourceErrorHandler, source_error_handler,
+    on_error, source_line_max_length, user_data)
+
+DEFINE_STRUCT(
+    WabtStream, stream,
+    writer, offset, result, log_stream)
+
+DEFINE_STRUCT(
+    WabtStringSlice, string_slice,
+    start, length)
+
+DEFINE_STRUCT(
+    WabtWriter, writer,
+    write_data, move_data)
+
+DEFINE_STRUCT(
+    WabtWriteBinaryOptions, write_binary_options,
+    log_stream, canonicalize_lebs, write_debug_names)
+/* clang-format on */
+
+WABT_EXTERN_C_END
+
+#endif /* WABT_EMSCRIPTEN_HELPERS_H_ */