// 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"); }