1 files changed, 142 insertions, 0 deletions
diff --git a/ports/webassembly/main.c b/ports/webassembly/main.c
new file mode 100644
index 0000000000..36ea9e98be
--- /dev/null
+++ b/ports/webassembly/main.c
@@ -0,0 +1,142 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2013-2021 Damien P. George and 2017, 2018 Rami Ali
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "py/builtin.h"
+#include "py/compile.h"
+#include "py/runtime.h"
+#include "py/repl.h"
+#include "py/gc.h"
+#include "py/mperrno.h"
+#include "shared/runtime/pyexec.h"
+
+#include "emscripten.h"
+#include "library.h"
+
+#if MICROPY_ENABLE_COMPILER
+int do_str(const char *src, mp_parse_input_kind_t input_kind) {
+    int ret = 0;
+    nlr_buf_t nlr;
+    if (nlr_push(&nlr) == 0) {
+        mp_lexer_t *lex = mp_lexer_new_from_str_len(MP_QSTR__lt_stdin_gt_, src, strlen(src), 0);
+        qstr source_name = lex->source_name;
+        mp_parse_tree_t parse_tree = mp_parse(lex, input_kind);
+        mp_obj_t module_fun = mp_compile(&parse_tree, source_name, false);
+        mp_call_function_0(module_fun);
+        nlr_pop();
+    } else {
+        // uncaught exception
+        if (mp_obj_is_subclass_fast(mp_obj_get_type((mp_obj_t)nlr.ret_val), &mp_type_SystemExit)) {
+            mp_obj_t exit_val = mp_obj_exception_get_value(MP_OBJ_FROM_PTR(nlr.ret_val));
+            if (exit_val != mp_const_none) {
+                mp_int_t int_val;
+                if (mp_obj_get_int_maybe(exit_val, &int_val)) {
+                    ret = int_val & 255;
+                } else {
+                    ret = 1;
+                }
+            }
+        } else {
+            mp_obj_print_exception(&mp_plat_print, (mp_obj_t)nlr.ret_val);
+            ret = 1;
+        }
+    }
+    return ret;
+}
+#endif
+
+int mp_js_do_str(const char *code) {
+    return do_str(code, MP_PARSE_FILE_INPUT);
+}
+
+int mp_js_process_char(int c) {
+    return pyexec_event_repl_process_char(c);
+}
+
+void mp_js_init(int heap_size) {
+    #if MICROPY_ENABLE_GC
+    char *heap = (char *)malloc(heap_size * sizeof(char));
+    gc_init(heap, heap + heap_size);
+    #endif
+
+    #if MICROPY_ENABLE_PYSTACK
+    static mp_obj_t pystack[1024];
+    mp_pystack_init(pystack, &pystack[MP_ARRAY_SIZE(pystack)]);
+    #endif
+
+    mp_init();
+}
+
+void mp_js_init_repl() {
+    pyexec_event_repl_init();
+}
+
+STATIC void gc_scan_func(void *begin, void *end) {
+    gc_collect_root((void **)begin, (void **)end - (void **)begin + 1);
+}
+
+void gc_collect(void) {
+    gc_collect_start();
+    emscripten_scan_stack(gc_scan_func);
+    emscripten_scan_registers(gc_scan_func);
+    gc_collect_end();
+}
+
+mp_lexer_t *mp_lexer_new_from_file(const char *filename) {
+    mp_raise_OSError(MP_ENOENT);
+}
+
+mp_import_stat_t mp_import_stat(const char *path) {
+    return MP_IMPORT_STAT_NO_EXIST;
+}
+
+mp_obj_t mp_builtin_open(size_t n_args, const mp_obj_t *args, mp_map_t *kwargs) {
+    return mp_const_none;
+}
+MP_DEFINE_CONST_FUN_OBJ_KW(mp_builtin_open_obj, 1, mp_builtin_open);
+
+void nlr_jump_fail(void *val) {
+    while (1) {
+        ;
+    }
+}
+
+void NORETURN __fatal_error(const char *msg) {
+    while (1) {
+        ;
+    }
+}
+
+#ifndef NDEBUG
+void MP_WEAK __assert_func(const char *file, int line, const char *func, const char *expr) {
+    printf("Assertion '%s' failed, at file %s:%d\n", expr, file, line);
+    __fatal_error("Assertion failed");
+}
+#endif