// SPDX-License-Identifier: (LGPL-2.1 OR BSD-2-Clause)

/*
 * BTF-to-C dumper test for majority of C syntax quirks.
 *
 * Copyright (c) 2019 Facebook
 */
/* ----- START-EXPECTED-OUTPUT ----- */
enum e1 {
        A = 0,
        B = 1,
};

enum e2 {
        C = 100,
        D = -100,
        E = 0,
};

typedef enum e2 e2_t;

typedef enum {
        F = 0,
        G = 1,
        H = 2,
} e3_t;

typedef int int_t;

typedef volatile const int * volatile const crazy_ptr_t;

typedef int *****we_need_to_go_deeper_ptr_t;

typedef volatile const we_need_to_go_deeper_ptr_t * restrict * volatile * const * restrict volatile * restrict const * volatile const * restrict volatile const how_about_this_ptr_t;

typedef int *ptr_arr_t[10];

typedef void (*fn_ptr1_t)(int);

typedef void (*printf_fn_t)(const char *, ...);

/* ------ END-EXPECTED-OUTPUT ------ */
/*
 * While previous function pointers are pretty trivial (C-syntax-level
 * trivial), the following are deciphered here for future generations:
 *
 * - `fn_ptr2_t`: function, taking anonymous struct as a first arg and pointer
 *   to a function, that takes int and returns int, as a second arg; returning
 *   a pointer to a const pointer to a char. Equivalent to:
 *      typedef struct { int a; } s_t;
 *      typedef int (*fn_t)(int);
 *      typedef char * const * (*fn_ptr2_t)(s_t, fn_t);
 *
 * - `fn_complext_t`: pointer to a function returning struct and accepting
 *   union and struct. All structs and enum are anonymous and defined inline.
 *
 * - `signal_t: pointer to a function accepting a pointer to a function as an
 *   argument and returning pointer to a function as a result. Sane equivalent:
 *      typedef void (*signal_handler_t)(int);
 *      typedef signal_handler_t (*signal_ptr_t)(int, signal_handler_t);
 *
 * - fn_ptr_arr1_t: array of pointers to a function accepting pointer to
 *   a pointer to an int and returning pointer to a char. Easy.
 *
 * - fn_ptr_arr2_t: array of const pointers to a function taking no arguments
 *   and returning a const pointer to a function, that takes pointer to a
 *   `int -> char *` function and returns pointer to a char. Equivalent:
 *   typedef char * (*fn_input_t)(int);
 *   typedef char * (*fn_output_outer_t)(fn_input_t);
 *   typedef const fn_output_outer_t (* fn_output_inner_t)();
 *   typedef const fn_output_inner_t fn_ptr_arr2_t[5];
 */
/* ----- START-EXPECTED-OUTPUT ----- */
typedef char * const * (*fn_ptr2_t)(struct {
        int a;
}, int (*)(int));

typedef struct {
        int a;
        void (*b)(int, struct {
                int c;
        }, union {
                char d;
                int e[5];
        });
} (*fn_complex_t)(union {
        void *f;
        char g[16];
}, struct {
        int h;
});

typedef void (* (*signal_t)(int, void (*)(int)))(int);

typedef char * (*fn_ptr_arr1_t[10])(int **);

typedef char * (* const (* const fn_ptr_arr2_t[5])())(char * (*)(int));

struct struct_w_typedefs {
        int_t a;
        crazy_ptr_t b;
        we_need_to_go_deeper_ptr_t c;
        how_about_this_ptr_t d;
        ptr_arr_t e;
        fn_ptr1_t f;
        printf_fn_t g;
        fn_ptr2_t h;
        fn_complex_t i;
        signal_t j;
        fn_ptr_arr1_t k;
        fn_ptr_arr2_t l;
};

typedef struct {
        int x;
        int y;
        int z;
} anon_struct_t;

struct struct_fwd;

typedef struct struct_fwd struct_fwd_t;

typedef struct struct_fwd *struct_fwd_ptr_t;

union union_fwd;

typedef union union_fwd union_fwd_t;

typedef union union_fwd *union_fwd_ptr_t;

struct struct_empty {};

struct struct_simple {
        int a;
        char b;
        const int_t *p;
        struct struct_empty s;
        enum e2 e;
        enum {
                ANON_VAL1 = 1,
                ANON_VAL2 = 2,
        } f;
        int arr1[13];
        enum e2 arr2[5];
};

union union_empty {};

union union_simple {
        void *ptr;
        int num;
        int_t num2;
        union union_empty u;
};

struct struct_in_struct {
        struct struct_simple simple;
        union union_simple also_simple;
        struct {
                int a;
        } not_so_hard_as_well;
        union {
                int b;
                int c;
        } anon_union_is_good;
        struct {
                int d;
                int e;
        };
        union {
                int f;
                int g;
        };
};

struct struct_with_embedded_stuff {
        int a;
        struct {
                int b;
                struct {
                        struct struct_with_embedded_stuff *c;
                        const char *d;
                } e;
                union {
                        volatile long int f;
                        void * restrict g;
                };
        };
        union {
                const int_t *h;
                void (*i)(char, int, void *);
        } j;
        enum {
                K = 100,
                L = 200,
        } m;
        char n[16];
        struct {
                char o;
                int p;
                void (*q)(int);
        } r[5];
        struct struct_in_struct s[10];
        int t[11];
};

struct root_struct {
        enum e1 _1;
        enum e2 _2;
        e2_t _2_1;
        e3_t _2_2;
        struct struct_w_typedefs _3;
        anon_struct_t _7;
        struct struct_fwd *_8;
        struct_fwd_t *_9;
        struct_fwd_ptr_t _10;
        union union_fwd *_11;
        union_fwd_t *_12;
        union_fwd_ptr_t _13;
        struct struct_with_embedded_stuff _14;
};

/* ------ END-EXPECTED-OUTPUT ------ */

int f(struct root_struct *s)
{
        return 0;
}