text: /*
   * This file is part of the MicroPython project, http://micropython.org/
   *
   * The MIT License (MIT)
   *
   * Copyright (c) 2014-2017 Paul Sokolovsky
   * Copyright (c) 2014-2017 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/mpconfig.h"
  #if MICROPY_PY_UTIME
  
  #include <unistd.h>
  #include <errno.h>
  #include <string.h>
  #include <time.h>
  #include <sys/time.h>
  #include <math.h>
  
  #include "py/runtime.h"
  #include "py/smallint.h"
  #include "py/mphal.h"
  #include "extmod/utime_mphal.h"
  
  #ifdef _WIN32
  static inline int msec_sleep_tv(struct timeval *tv) {
      msec_sleep(tv->tv_sec * 1000.0 + tv->tv_usec / 1000.0);
      return 0;
  }
  #define sleep_select(a,b,c,d,e) msec_sleep_tv((e))
  #else
  #define sleep_select select
  #endif
  
  // mingw32 defines CLOCKS_PER_SEC as ((clock_t)<somevalue>) but preprocessor does not handle casts
  #if defined(__MINGW32__) && !defined(__MINGW64_VERSION_MAJOR)
  #define MP_REMOVE_BRACKETSA(x)
  #define MP_REMOVE_BRACKETSB(x) MP_REMOVE_BRACKETSA x
  #define MP_REMOVE_BRACKETSC(x) MP_REMOVE_BRACKETSB x
  #define MP_CLOCKS_PER_SEC MP_REMOVE_BRACKETSC(CLOCKS_PER_SEC)
  #else
  #define MP_CLOCKS_PER_SEC CLOCKS_PER_SEC
  #endif
  
  #if defined(MP_CLOCKS_PER_SEC)
  #define CLOCK_DIV (MP_CLOCKS_PER_SEC / 1000.0F)
  #else
  #error Unsupported clock() implementation
  #endif
  
  STATIC mp_obj_t mod_time_time(void) {
      #if MICROPY_PY_BUILTINS_FLOAT
      struct timeval tv;
      gettimeofday(&tv, NULL);
      mp_float_t val = tv.tv_sec + (mp_float_t)tv.tv_usec / 1000000;
      return mp_obj_new_float(val);
      #else
      return mp_obj_new_int((mp_int_t)time(NULL));
      #endif
  }
  STATIC MP_DEFINE_CONST_FUN_OBJ_0(mod_time_time_obj, mod_time_time);
  
  // Note: this is deprecated since CPy3.3, but pystone still uses it.
  STATIC mp_obj_t mod_time_clock(void) {
      #if MICROPY_PY_BUILTINS_FLOAT
      // float cannot represent full range of int32 precisely, so we pre-divide
      // int to reduce resolution, and then actually do float division hoping
      // to preserve integer part resolution.
      return mp_obj_new_float((float)(clock() / 1000) / CLOCK_DIV);
      #else
      return mp_obj_new_int((mp_int_t)clock());
      #endif
  }
  STATIC MP_DEFINE_CONST_FUN_OBJ_0(mod_time_clock_obj, mod_time_clock);
  
  STATIC mp_obj_t mod_time_sleep(mp_obj_t arg) {
      #if MICROPY_PY_BUILTINS_FLOAT
      struct timeval tv;
      mp_float_t val = mp_obj_get_float(arg);
      double ipart;
      tv.tv_usec = round(modf(val, &ipart) * 1000000);
      tv.tv_sec = ipart;
      int res;
      while (1) {
          MP_THREAD_GIL_EXIT();
          res = sleep_select(0, NULL, NULL, NULL, &tv);
          MP_THREAD_GIL_ENTER();
          #if MICROPY_SELECT_REMAINING_TIME
          // TODO: This assumes Linux behavior of modifying tv to the remaining
          // time.
          if (res != -1 || errno != EINTR) {
              break;
          }
          mp_handle_pending(true);
          //printf("select: EINTR: %ld:%ld\n", tv.tv_sec, tv.tv_usec);
          #else
          break;
          #endif
      }
      RAISE_ERRNO(res, errno);
      #else
      // TODO: Handle EINTR
      MP_THREAD_GIL_EXIT();
      sleep(mp_obj_get_int(arg));
      MP_THREAD_GIL_ENTER();
      #endif
      return mp_const_none;
  }
  STATIC MP_DEFINE_CONST_FUN_OBJ_1(mod_time_sleep_obj, mod_time_sleep);
  
  STATIC mp_obj_t mod_time_localtime(size_t n_args, const mp_obj_t *args) {
      time_t t;
      if (n_args == 0) {
          t = time(NULL);
      } else {
          #if MICROPY_PY_BUILTINS_FLOAT
          mp_float_t val = mp_obj_get_float(args[0]);
          t = (time_t)MICROPY_FLOAT_C_FUN(trunc)(val);
          #else
          t = mp_obj_get_int(args[0]);
          #endif
      }
      struct tm *tm = localtime(&t);
  
      mp_obj_t ret = mp_obj_new_tuple(9, NULL);
  
      mp_obj_tuple_t *tuple = MP_OBJ_TO_PTR(ret);
      tuple->items[0] = MP_OBJ_NEW_SMALL_INT(tm->tm_year + 1900);
      tuple->items[1] = MP_OBJ_NEW_SMALL_INT(tm->tm_mon + 1);
      tuple->items[2] = MP_OBJ_NEW_SMALL_INT(tm->tm_mday);
      tuple->items[3] = MP_OBJ_NEW_SMALL_INT(tm->tm_hour);
      tuple->items[4] = MP_OBJ_NEW_SMALL_INT(tm->tm_min);
      tuple->items[5] = MP_OBJ_NEW_SMALL_INT(tm->tm_sec);
      int wday = tm->tm_wday - 1;
      if (wday < 0) {
          wday = 6;
      }
      tuple->items[6] = MP_OBJ_NEW_SMALL_INT(wday);
      tuple->items[7] = MP_OBJ_NEW_SMALL_INT(tm->tm_yday + 1);
      tuple->items[8] = MP_OBJ_NEW_SMALL_INT(tm->tm_isdst);
  
      return ret;
  }
  STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(mod_time_localtime_obj, 0, 1, mod_time_localtime);
  
  STATIC mp_obj_t mod_time_mktime(mp_obj_t tuple) {
      size_t len;
      mp_obj_t *elem;
      mp_obj_get_array(tuple, &len, &elem);
  
      // localtime generates a tuple of len 8. CPython uses 9, so we accept both.
      if (len < 8 || len > 9) {
          mp_raise_TypeError("mktime needs a tuple of length 8 or 9");
      }
  
      struct tm time = {
          .tm_year = mp_obj_get_int(elem[0]) - 1900,
          .tm_mon = mp_obj_get_int(elem[1]) - 1,
          .tm_mday = mp_obj_get_int(elem[2]),
          .tm_hour = mp_obj_get_int(elem[3]),
          .tm_min = mp_obj_get_int(elem[4]),
          .tm_sec = mp_obj_get_int(elem[5]),
      };
      if (len == 9) {
          time.tm_isdst = mp_obj_get_int(elem[8]);
      } else {
          time.tm_isdst = -1; // auto-detect
      }
      time_t ret = mktime(&time);
      if (ret == -1) {
          mp_raise_msg(&mp_type_OverflowError, "invalid mktime usage");
      }
      return mp_obj_new_int(ret);
  }
  MP_DEFINE_CONST_FUN_OBJ_1(mod_time_mktime_obj, mod_time_mktime);
  
  STATIC const mp_rom_map_elem_t mp_module_time_globals_table[] = {
      { MP_ROM_QSTR(MP_QSTR___name__), MP_ROM_QSTR(MP_QSTR_utime) },
      { MP_ROM_QSTR(MP_QSTR_clock), MP_ROM_PTR(&mod_time_clock_obj) },
      { MP_ROM_QSTR(MP_QSTR_sleep), MP_ROM_PTR(&mod_time_sleep_obj) },
      { MP_ROM_QSTR(MP_QSTR_sleep_ms), MP_ROM_PTR(&mp_utime_sleep_ms_obj) },
      { MP_ROM_QSTR(MP_QSTR_sleep_us), MP_ROM_PTR(&mp_utime_sleep_us_obj) },
      { MP_ROM_QSTR(MP_QSTR_time), MP_ROM_PTR(&mod_time_time_obj) },
      { MP_ROM_QSTR(MP_QSTR_ticks_ms), MP_ROM_PTR(&mp_utime_ticks_ms_obj) },
      { MP_ROM_QSTR(MP_QSTR_ticks_us), MP_ROM_PTR(&mp_utime_ticks_us_obj) },
      { MP_ROM_QSTR(MP_QSTR_ticks_cpu), MP_ROM_PTR(&mp_utime_ticks_cpu_obj) },
      { MP_ROM_QSTR(MP_QSTR_ticks_add), MP_ROM_PTR(&mp_utime_ticks_add_obj) },
      { MP_ROM_QSTR(MP_QSTR_ticks_diff), MP_ROM_PTR(&mp_utime_ticks_diff_obj) },
      { MP_ROM_QSTR(MP_QSTR_localtime), MP_ROM_PTR(&mod_time_localtime_obj) },
      { MP_ROM_QSTR(MP_QSTR_mktime), MP_ROM_PTR(&mod_time_mktime_obj) },
  };
  
  STATIC MP_DEFINE_CONST_DICT(mp_module_time_globals, mp_module_time_globals_table);
  
  const mp_obj_module_t mp_module_time = {
      .base = { &mp_type_module },
      .globals = (mp_obj_dict_t *)&mp_module_time_globals,
  };
  
  #endif // MICROPY_PY_UTIME
  