webassembly: Enable time localtime, gmtime, time, time_ns.

Signed-off-by: Damien George <damien@micropython.org>

ports/webassembly/Makefile

@@ -23,6 +23,7 @@ SRC_SHARED = $(addprefix shared/,\
 	runtime/stdout_helpers.c \
 	runtime/pyexec.c \
 	readline/readline.c \
+	timeutils/timeutils.c \
 	)
 
 SRC_C = \

ports/webassembly/library.h

@@ -29,4 +29,5 @@
 extern void mp_js_write(const char *str, mp_uint_t len);
 extern int mp_js_ticks_ms(void);
 extern void mp_js_hook(void);
+extern double mp_js_time_ms(void);
 extern uint32_t mp_js_random_u32(void);

ports/webassembly/library.js

@@ -64,6 +64,8 @@ mergeInto(LibraryManager.library, {
         }
     },
 
+    mp_js_time_ms: () => Date.now(),
+
     // Node prior to v19 did not expose "crypto" as a global, so make sure it exists.
     mp_js_random_u32__postset:
         "if (globalThis.crypto === undefined) { globalThis.crypto = require('crypto'); }",

ports/webassembly/modtime.c

@@ -0,0 +1,51 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2023 Damien P. George
+ *
+ * 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 "py/obj.h"
+#include "shared/timeutils/timeutils.h"
+#include "library.h"
+
+// Return the localtime as an 8-tuple.
+static mp_obj_t mp_time_localtime_get(void) {
+    timeutils_struct_time_t tm;
+    timeutils_seconds_since_epoch_to_struct_time(mp_hal_time_ms() / 1000, &tm);
+    mp_obj_t tuple[8] = {
+        mp_obj_new_int(tm.tm_year),
+        mp_obj_new_int(tm.tm_mon),
+        mp_obj_new_int(tm.tm_mday),
+        mp_obj_new_int(tm.tm_hour),
+        mp_obj_new_int(tm.tm_min),
+        mp_obj_new_int(tm.tm_sec),
+        mp_obj_new_int(tm.tm_wday),
+        mp_obj_new_int(tm.tm_yday),
+    };
+    return mp_obj_new_tuple(8, tuple);
+}
+
+// Returns the number of seconds, as a float, since the Epoch.
+static mp_obj_t mp_time_time_get(void) {
+    return mp_obj_new_float((mp_float_t)mp_hal_time_ms() / 1000);
+}

ports/webassembly/mpconfigport.h

@@ -50,7 +50,11 @@
 #define MICROPY_USE_INTERNAL_ERRNO  (1)
 #define MICROPY_USE_INTERNAL_PRINTF (0)
 
+#define MICROPY_EPOCH_IS_1970       (1)
 #define MICROPY_PY_RANDOM_SEED_INIT_FUNC (mp_js_random_u32())
+#define MICROPY_PY_TIME_GMTIME_LOCALTIME_MKTIME (1)
+#define MICROPY_PY_TIME_TIME_TIME_NS (1)
+#define MICROPY_PY_TIME_INCLUDEFILE "ports/webassembly/modtime.c"
 #ifndef MICROPY_VFS
 #define MICROPY_VFS                 (1)
 #endif

ports/webassembly/mphalport.c

@@ -56,6 +56,15 @@ mp_uint_t mp_hal_ticks_cpu(void) {
     return 0;
 }
 
+uint64_t mp_hal_time_ms(void) {
+    double mm = mp_js_time_ms();
+    return (uint64_t)mm;
+}
+
+uint64_t mp_hal_time_ns(void) {
+    return mp_hal_time_ms() * 1000000ULL;
+}
+
 extern int mp_interrupt_char;
 
 int mp_hal_get_interrupt_char(void) {

ports/webassembly/mphalport.h

@@ -35,6 +35,7 @@ void mp_hal_delay_us(mp_uint_t us);
 mp_uint_t mp_hal_ticks_ms(void);
 mp_uint_t mp_hal_ticks_us(void);
 mp_uint_t mp_hal_ticks_cpu(void);
+uint64_t mp_hal_time_ms(void);
 
 int mp_hal_get_interrupt_char(void);