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/* MIT License
*
* Copyright (c) 2021 Tyge Løvset, NORCE, www.norceresearch.no
*
* 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 CCOMMON_H_INCLUDED
#define CCOMMON_H_INCLUDED
#define __USE_MINGW_ANSI_STDIO 1
#include <stdint.h>
#include <stddef.h>
#include <stdbool.h>
#include <assert.h>
#if defined(_MSC_VER)
# define STC_FORCE_INLINE static __forceinline
#elif defined(__GNUC__) || defined(__clang__)
# define STC_FORCE_INLINE static inline __attribute((always_inline))
#else
# define STC_FORCE_INLINE static inline
#endif
#define STC_INLINE static inline
#if defined(STC_HEADER) || defined(STC_IMPLEMENTATION)
# define STC_API extern
# define STC_DEF
# define STC_LIBRARY_ONLY(...) __VA_ARGS__
# define STC_STATIC_ONLY(...)
#else
# define STC_API static inline
# define STC_DEF static inline
# define STC_LIBRARY_ONLY(...)
# define STC_STATIC_ONLY(...) __VA_ARGS__
#endif
/* Macro overloading feature support: https://rextester.com/ONP80107 */
#define _c_CAT( A, B ) A ## B
#define _c_EXPAND(...) __VA_ARGS__
#define _c_ARG_N(_0, _1, _2, _3, _4, _5, _6, _7, _8, _9, _10, _11, _12, _13, _14, _15, _16, _17, N,...) N
#define _c_RSEQ_N 18, 17, 16, 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0
#define _c_APPLY_ARG_N(ARGS) _c_EXPAND(_c_ARG_N ARGS)
#define _c_VA_ARG_SIZE(...) _c_EXPAND(_c_APPLY_ARG_N((__VA_ARGS__, _c_RSEQ_N)))
#define _c_SELECT(NAME, NUM) _c_CAT( NAME ## _, NUM)
#define c_MACRO_OVERLOAD(NAME, ...) _c_SELECT(NAME, _c_VA_ARG_SIZE(__VA_ARGS__))(__VA_ARGS__)
#define c_static_assert(cond, ...) typedef char _static_assert_[(cond) ? 1 : -1]
#define c_container_of(ptr, type, member) \
((type *)((char *)(ptr) - offsetof(type, member)))
#define c_struct(S) typedef struct S S; struct S
#define c_new(...) c_MACRO_OVERLOAD(c_new, __VA_ARGS__)
#define c_new_1(T) ((T *) c_malloc(sizeof(T)))
#define c_new_2(T, n) ((T *) c_malloc(sizeof(T)*(n)))
#ifndef c_malloc
#define c_malloc(sz) malloc(sz)
#define c_calloc(n, sz) calloc(n, sz)
#define c_realloc(p, sz) realloc(p, sz)
#define c_free(p) free(p)
#endif
#define c_swap(T, x, y) do { T _c_t = x; x = y; y = _c_t; } while (0)
#define c_arraylen(a) (sizeof (a)/sizeof (a)[0])
#define c_default_compare(x, y) c_less_compare(c_default_less, x, y)
#define c_default_less(x, y) (*(x) < *(y))
#define c_no_compare(x, y) (assert(!"c_no_compare() called"), 0)
#define c_less_compare(less, x, y) (less(y, x) - less(x, y))
#define c_default_equals(x, y) (*(x) == *(y))
#define c_trivial_equals(x, y) (memcmp(x, y, sizeof *(x)) == 0)
#define c_no_clone(x) (assert(!"c_no_clone() called"), x)
#define c_trivial_fromraw(x) (x)
#define c_trivial_toraw(ptr) (*(ptr))
#define c_trivial_del(ptr) ((void) (ptr))
/* Generic algorithms */
#define c_foreach(...) c_MACRO_OVERLOAD(c_foreach, __VA_ARGS__)
#define c_foreach_3(it, ctype, cnt) \
for (ctype##_iter_t it = ctype##_begin(&cnt), it##_end_ = ctype##_end(&cnt) \
; it.ref != it##_end_.ref; ctype##_next(&it))
#define c_foreach_4(it, ctype, start, finish) \
for (ctype##_iter_t it = start, it##_end_ = finish \
; it.ref != it##_end_.ref; ctype##_next(&it))
#define c_forrange(...) c_MACRO_OVERLOAD(c_forrange, __VA_ARGS__)
#define c_forrange_1(stop) for (size_t _c_i=0, _c_end_=stop; _c_i < _c_end_; ++_c_i)
#define c_forrange_2(i, stop) for (size_t i=0, i##_end_=stop; i < i##_end_; ++i)
#define c_forrange_3(i, type, stop) for (type i=0, i##_end_=stop; i < i##_end_; ++i)
#define c_forrange_4(i, type, start, stop) for (type i=start, i##_end_=stop; i < i##_end_; ++i)
#define c_forrange_5(i, type, start, stop, step) \
for (type i=start, i##_inc_=step, i##_end_=(stop) - (0 < i##_inc_) \
; (i <= i##_end_) == (0 < i##_inc_); i += i##_inc_)
#define c_withfile(f, open) for (FILE *f = open; f; fclose(f), f = NULL)
#define c_withbuffer(b, type, n) c_withbuffer_x(b, type, n, 256)
#define c_withbuffer_x(b, type, n, BYTES) \
for (type _c_b[((BYTES) - 1) / sizeof(type) + 1], \
*b = (n)*sizeof *b > (BYTES) ? c_new_2(type, n) : _c_b \
; b; b != _c_b ? c_free(b) : (void)0, b = NULL)
#define c_breakwith continue
#define c_init(ctype, c, ...) \
ctype c = ctype##_init(); c_emplace(ctype, c, __VA_ARGS__)
#define c_emplace(ctype, c, ...) do { \
const ctype##_rawvalue_t _c_arr[] = __VA_ARGS__; \
ctype##_emplace_n(&(c), _c_arr, c_arraylen(_c_arr)); \
} while (0)
#define c_del(ctype, ...) do { \
ctype* _c_arr[] = {__VA_ARGS__}; \
for (size_t _c_i = 0; _c_i < c_arraylen(_c_arr); ++_c_i) \
ctype##_del(_c_arr[_c_i]); \
} while (0)
#if defined(__SIZEOF_INT128__)
#define c_umul128(a, b, lo, hi) \
do { __uint128_t _z = (__uint128_t)(a)*(b); \
*(lo) = (uint64_t)_z, *(hi) = _z >> 64; } while(0)
#elif defined(_MSC_VER) && defined(_WIN64)
#include <intrin.h>
#define c_umul128(a, b, lo, hi) (*(lo) = _umul128(a, b, hi), (void)0)
#elif defined(__x86_64__)
#define c_umul128(a, b, lo, hi) \
asm("mulq %[rhs]" : "=a" (*(lo)), "=d" (*(hi)) \
: [lhs] "0" (a), [rhs] "rm" (b))
#endif
#endif
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