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/* MIT License
*
* Copyright (c) 2023 Tyge Løvset
*
* 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.
*/
/*
#include <stdio.h>
#include <stc/algo/filter.h>
#include <stc/algo/crange.h>
int main()
{
crange r1 = crange_make(80, 90);
c_foreach (i, crange, r1)
printf(" %lld", *i.ref);
puts("");
// use a temporary crange object.
int a = 100, b = INT32_MAX;
c_forfilter (i, crange, crange_obj(a, b, 8),
c_flt_skip(i, 10) &&
c_flt_take(i, 3))
printf(" %lld", *i.ref);
puts("");
}
*/
#ifndef STC_CRANGE_H_INCLUDED
#define STC_CRANGE_H_INCLUDED
#include <stc/ccommon.h>
#define crange_obj(...) \
(*(crange[]){crange_make(__VA_ARGS__)})
typedef long long crange_value;
typedef struct { crange_value start, end, step, value; } crange;
typedef struct { crange_value *ref, end, step; } crange_iter;
#define crange_make(...) c_MACRO_OVERLOAD(crange_make, __VA_ARGS__)
#define crange_make_1(stop) crange_make_3(0, stop, 1)
#define crange_make_2(start, stop) crange_make_3(start, stop, 1)
STC_INLINE crange crange_make_3(crange_value start, crange_value stop, crange_value step)
{ crange r = {start, stop - (step > 0), step}; return r; }
STC_INLINE crange_iter crange_begin(crange* self)
{ self->value = self->start; crange_iter it = {&self->value, self->end, self->step}; return it; }
STC_INLINE crange_iter crange_end(crange* self)
{ crange_iter it = {NULL}; return it; }
STC_INLINE void crange_next(crange_iter* it)
{ *it->ref += it->step; if ((it->step > 0) == (*it->ref > it->end)) it->ref = NULL; }
#endif
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