// SPDX-License-Identifier: GPL-2.0
// Copyright (c) 2024, Intel Corporation
#include <stdbool.h>
#include <stdio.h>

#define MAX_PACKED_FIELD_SIZE 50

int main(int argc, char **argv)
{
        /* The first macro doesn't need a 'do {} while(0)' loop */
        printf("#define CHECK_PACKED_FIELDS_1(fields) \\\n");
        printf("\tCHECK_PACKED_FIELD(fields, 0)\n\n");

        /* Remaining macros require a do/while loop, and are implemented
         * recursively by calling the previous iteration's macro.
         */
        for (int i = 2; i <= MAX_PACKED_FIELD_SIZE; i++) {
                printf("#define CHECK_PACKED_FIELDS_%d(fields) do { \\\n", i);
                printf("\tCHECK_PACKED_FIELDS_%d(fields); \\\n", i - 1);
                printf("\tCHECK_PACKED_FIELD(fields, %d); \\\n", i - 1);
                printf("} while (0)\n\n");
        }

        printf("#define CHECK_PACKED_FIELDS(fields) \\\n");

        for (int i = 1; i <= MAX_PACKED_FIELD_SIZE; i++)
                printf("\t__builtin_choose_expr(ARRAY_SIZE(fields) == %d, ({ CHECK_PACKED_FIELDS_%d(fields); }), \\\n",
                       i, i);

        printf("\t({ BUILD_BUG_ON_MSG(1, \"CHECK_PACKED_FIELDS() must be regenerated to support array sizes larger than %d.\"); }) \\\n",
               MAX_PACKED_FIELD_SIZE);

        for (int i = 1; i <= MAX_PACKED_FIELD_SIZE; i++)
                printf(")");

        printf("\n");
}