/*
 * Copyright (c) 2020-2026 Valve Corporation
 * Copyright (c) 2020-2026 LunarG, Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 * Authors:
 * - Christophe Riccio <christophe@lunarg.com>
 */

#include "date.h"
#include "util.h"

#define COMPUTE_BUILD_YEAR \
    ((__DATE__[7] - '0') * 1000 + (__DATE__[8] - '0') * 100 + (__DATE__[9] - '0') * 10 + (__DATE__[10] - '0'))

#define COMPUTE_BUILD_DAY (((__DATE__[4] >= '0') ? (__DATE__[4] - '0') * 10 : 0) + (__DATE__[5] - '0'))

#define BUILD_MONTH_IS_JAN (__DATE__[0] == 'J' && __DATE__[1] == 'a' && __DATE__[2] == 'n')
#define BUILD_MONTH_IS_FEB (__DATE__[0] == 'F')
#define BUILD_MONTH_IS_MAR (__DATE__[0] == 'M' && __DATE__[1] == 'a' && __DATE__[2] == 'r')
#define BUILD_MONTH_IS_APR (__DATE__[0] == 'A' && __DATE__[1] == 'p')
#define BUILD_MONTH_IS_MAY (__DATE__[0] == 'M' && __DATE__[1] == 'a' && __DATE__[2] == 'y')
#define BUILD_MONTH_IS_JUN (__DATE__[0] == 'J' && __DATE__[1] == 'u' && __DATE__[2] == 'n')
#define BUILD_MONTH_IS_JUL (__DATE__[0] == 'J' && __DATE__[1] == 'u' && __DATE__[2] == 'l')
#define BUILD_MONTH_IS_AUG (__DATE__[0] == 'A' && __DATE__[1] == 'u')
#define BUILD_MONTH_IS_SEP (__DATE__[0] == 'S')
#define BUILD_MONTH_IS_OCT (__DATE__[0] == 'O')
#define BUILD_MONTH_IS_NOV (__DATE__[0] == 'N')
#define BUILD_MONTH_IS_DEC (__DATE__[0] == 'D')

#define COMPUTE_BUILD_MONTH      \
    ((BUILD_MONTH_IS_JAN)   ? 1  \
     : (BUILD_MONTH_IS_FEB) ? 2  \
     : (BUILD_MONTH_IS_MAR) ? 3  \
     : (BUILD_MONTH_IS_APR) ? 4  \
     : (BUILD_MONTH_IS_MAY) ? 5  \
     : (BUILD_MONTH_IS_JUN) ? 6  \
     : (BUILD_MONTH_IS_JUL) ? 7  \
     : (BUILD_MONTH_IS_AUG) ? 8  \
     : (BUILD_MONTH_IS_SEP) ? 9  \
     : (BUILD_MONTH_IS_OCT) ? 10 \
     : (BUILD_MONTH_IS_NOV) ? 11 \
     : (BUILD_MONTH_IS_DEC) ? 12 \
                            : /* error default */ 99)

#define BUILD_DATE_IS_BAD (__DATE__[0] == '?')

#define BUILD_YEAR ((BUILD_DATE_IS_BAD) ? 99 : COMPUTE_BUILD_YEAR)
#define BUILD_MONTH ((BUILD_DATE_IS_BAD) ? 99 : COMPUTE_BUILD_MONTH)
#define BUILD_DAY ((BUILD_DATE_IS_BAD) ? 99 : COMPUTE_BUILD_DAY)

std::string GetBuildDate() { return format("%04d%02d%02d", BUILD_YEAR, BUILD_MONTH, BUILD_DAY); }
