Wasm export

BUILD.bazel

@@ -1,31 +1,67 @@
-load("@rules_cc//cc:defs.bzl", "cc_library")
+load("@rules_cc//cc:defs.bzl", "cc_binary", "cc_library")
+load("@emsdk//emscripten_toolchain:wasm_rules.bzl", "wasm_cc_binary")
 load("//bazel:copts.bzl", "copts")
 
 package(default_visibility = ["//visibility:public"])
 
+# keep sorted
+_srcs = [
+    "ecsact/detail/check_set.hh",
+    "ecsact/detail/fixed_stack.hh",
+    "ecsact/detail/grammar.hh",
+    "ecsact/detail/read_util.hh",
+    "ecsact/detail/stack_util.hh",
+    "ecsact/ecsact_parse.cc",
+    "ecsact/ecsact_parse_statement.cc",
+]
+
+# keep sorted
+_hdrs = [
+    "ecsact/parse.h",
+    "ecsact/parse/error.h",
+    "ecsact/parse/statements.h",
+    "ecsact/parse/status.h",
+    "ecsact/parse/string.h",
+]
+
+# keep sorted
+_deps = [
+    "@ecsact_runtime//:common",
+    "@ecsact_runtime//:definitions",
+    "@lexy",
+    "@magic_enum",
+]
+
 cc_library(
     name = "ecsact_parse",
-    srcs = [
-        "ecsact/detail/check_set.hh",
-        "ecsact/detail/fixed_stack.hh",
-        "ecsact/detail/grammar.hh",
-        "ecsact/detail/read_util.hh",
-        "ecsact/detail/stack_util.hh",
-        "ecsact/ecsact_parse.cc",
-        "ecsact/ecsact_parse_statement.cc",
+    srcs = _srcs,
+    hdrs = _hdrs,
+    copts = copts,
+    deps = _deps,
+)
+
+cc_binary(
+    name = "ecsact_parse_shared",
+    srcs = _srcs + _hdrs,
+    copts = copts,
+    features = [
+        "wasm_standalone",
+        "wasm_no_entry",
+        "-wasm_warnings_as_errors",
+        "-wasm_error_on_undefined_symbols",
+        "-exceptions",
     ],
-    hdrs = [
-        "ecsact/parse.h",
-        "ecsact/parse/error.h",
-        "ecsact/parse/statements.h",
-        "ecsact/parse/status.h",
-        "ecsact/parse/string.h",
+    linkshared = True,
+    deps = _deps,
+)
+
+wasm_cc_binary(
+    name = "ecsact_parse_wasm",
+    cc_target = ":ecsact_parse_shared",
+    exported_functions = [
+        "_ecsact_parse_statement",
     ],
-    copts = copts,
-    deps = [
-        "@ecsact_runtime//:common",
-        "@ecsact_runtime//:definitions",
-        "@lexy",
-        "@magic_enum",
+    outputs = [
+        "ecsact_parse_shared.wasm",
     ],
 )

WORKSPACE.bazel

@@ -12,6 +12,25 @@ http_archive(
     url = "https://github.com/google/googletest/archive/d1a0039b97291dd1dc14f123b906bb7622ffe07c.zip",
 )
 
+http_archive(
+    name = "emsdk",
+    sha256 = "28bba9c179854b0f7e548a7adf87173e8cbe098ddfdbe25fa9f5a5875faa0a1a",
+    strip_prefix = "emsdk-589dd6a639ff428852cf998607cf226c5ce12efb/bazel",
+    url = "https://github.com/zaucy/emsdk/archive/589dd6a639ff428852cf998607cf226c5ce12efb.zip",
+)
+
+load("@emsdk//:deps.bzl", emsdk_deps = "deps")
+
+emsdk_deps()
+
+load("@emsdk//:emscripten_deps.bzl", emsdk_emscripten_deps = "emscripten_deps")
+
+emsdk_emscripten_deps()
+
+load("@emsdk//:toolchains.bzl", "register_emscripten_toolchains")
+
+register_emscripten_toolchains()
+
 http_archive(
     name = "hedron_compile_commands",
     sha256 = "4deb7cd90ba69983ec7734c0dcc7071828ebdc430a69f82ddbccf698018b9c04",

ecsact/parse.h

@@ -5,6 +5,12 @@
 #include "ecsact/parse/status.h"
 #include "ecsact/parse/error.h"
 
+#ifdef __cplusplus
+#	define ECSACT_PARSE_API extern "C"
+#else
+#	define ECSACT_PARSE_API extern
+#endif
+
 typedef enum {
 	ECSACT_PARSE_CALLBACK_STOP,
 	ECSACT_PARSE_CALLBACK_CONTINUE,
@@ -34,15 +40,15 @@ typedef ecsact_parse_callback_result(*ecsact_parse_callback)
  *        parsing `statement_string`. May be `NULL`.
  * @returns read length
  */
-int ecsact_parse_statement
+ECSACT_PARSE_API int ecsact_parse_statement
 	( const char*              statement_string
 	, int                      max_read_length
 	, const ecsact_statement*  context_statement
 	, ecsact_statement*        out_statement
 	, ecsact_parse_status*     out_status
 	);
 
-void ecsact_parse
+ECSACT_PARSE_API void ecsact_parse
 	( const char**           file_paths
 	, int                    file_paths_count
 	, ecsact_parse_callback  callback