/*
 * The MIT License (MIT)
 *
 * Copyright (c) Henry Gabryjelski
 * Copyright (c) Ha Thach for Adafruit Industries
 *
 * 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.
 */

#ifndef COMPILE_DATE_H
#define COMPILE_DATE_H

/* Help enable build to be deterministic. */
/* Allows Ghostfat to generate 100% reproducible images across compilations. */
/* Reproducible builds are also important for other reasons. */
/* See generally, https://reproducible-builds.org/ */
#ifndef COMPILE_DATE
#define COMPILE_DATE __DATE__
#endif
#ifndef COMPILE_TIME
#define COMPILE_TIME __TIME__
#endif

#define COMPILE_YEAR_INT (((\
                (COMPILE_DATE[7u] - '0')  * 10u + \
                (COMPILE_DATE[8u] - '0')) * 10u + \
                (COMPILE_DATE[9u] - '0')) * 10u + \
                (COMPILE_DATE[10u] - '0'))

#define COMPILE_MONTH_INT  (\
        (COMPILE_DATE[2u] == 'n' && COMPILE_DATE[1u] == 'a') ?  1u  /*Jan*/ \
        : (COMPILE_DATE[2u] == 'b') ?  2u  /*Feb*/ \
        : (COMPILE_DATE[2u] == 'r' && COMPILE_DATE[1u] == 'a') ?  3u  /*Mar*/ \
        : (COMPILE_DATE[2u] == 'r') ?  4u  /*Apr*/ \
        : (COMPILE_DATE[2u] == 'y') ?  5u  /*May*/ \
        : (COMPILE_DATE[2u] == 'n') ?  6u  /*Jun*/ \
        : (COMPILE_DATE[2u] == 'l') ?  7u  /*Jul*/ \
        : (COMPILE_DATE[2u] == 'g') ?  8u  /*Aug*/ \
        : (COMPILE_DATE[2u] == 'p') ?  9u  /*Sep*/ \
        : (COMPILE_DATE[2u] == 't') ? 10u  /*Oct*/ \
        : (COMPILE_DATE[2u] == 'v') ? 11u  /*Nov*/ \
        :                                                          12u  /*Dec*/)

#define COMPILE_DAY_INT (\
        (COMPILE_DATE[4u] == ' ' ? 0 : COMPILE_DATE[4u] - '0') * 10u + \
        (COMPILE_DATE[5u] - '0')                                             \
)

/* __TIME__ expands to an eight-character string constant */
/* "23:59:01", or (if cannot determine time) "??:??:??"  */
#define COMPILE_HOUR_INT (\
        (COMPILE_TIME[0u] == '?' ? 0 : COMPILE_TIME[0u] - '0') * 10u \
        + (COMPILE_TIME[1u] == '?' ? 0 : COMPILE_TIME[1u] - '0'))

#define COMPILE_MINUTE_INT (\
        (COMPILE_TIME[3u] == '?' ? 0 : COMPILE_TIME[3u] - '0') * 10u \
        + (COMPILE_TIME[4u] == '?' ? 0 : COMPILE_TIME[4u] - '0'))

#define COMPILE_SECONDS_INT (\
        (COMPILE_TIME[6u] == '?' ? 0 : COMPILE_TIME[6u] - '0') * 10u \
        + (COMPILE_TIME[7u] == '?' ? 0 : COMPILE_TIME[7u] - '0'))


#define COMPILE_DOS_DATE (\
        ((COMPILE_YEAR_INT  - 1980u) << 9u) | \
        (COMPILE_MONTH_INT          << 5u) | \
        (COMPILE_DAY_INT            << 0u))

#define COMPILE_DOS_TIME (\
        (COMPILE_HOUR_INT    << 11u) | \
        (COMPILE_MINUTE_INT  <<  5u) | \
        (COMPILE_SECONDS_INT <<  0u))

#endif /* COMPILE_DATE_H */