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/* MIT License
*
* Copyright (c) 2022 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.
*/
/*
#include <stdio.h>
#include <stc/algo/cspan.h>
using_cspan(IntSpan, int);
int main()
{
int array[] = {1, 2, 3, 4, 5};
IntSpan iv = {array, c_arraylen(array)};
c_foreach (i, IntSpan, iv)
printf(" %d", *i.ref);
puts("");
// use a temporary IntSpan object.
c_forfilter (i, IntSpan, cspan_LITERAL(IntSpan, {10, 20, 30, 23, 22, 21})
, c_flt_skipwhile(i, *i.ref < 25)
&& (*i.ref & 1) == 0 // even only
, c_flt_take(i, 2)) // break after 2
printf(" %d", *i.ref);
puts("");
}
*/
#ifndef STC_CSPAN_H_INCLUDED
#define STC_CSPAN_H_INCLUDED
#include <stc/ccommon.h>
#define cspan_LITERAL(C, ...) \
((C){.data = (C##_value[])__VA_ARGS__, \
.size = sizeof((C##_value[])__VA_ARGS__)/sizeof(C##_value)})
#define using_cspan(Self, T) \
typedef T Self##_raw; typedef const Self##_raw Self##_value; \
typedef struct { Self##_value *data; size_t size; } Self; \
typedef struct { Self##_value *ref, *end; } Self##_iter; \
\
STC_INLINE Self##_value* Self##_at(const Self* self, size_t idx) \
{ assert(idx < self->size); return self->data + idx; } \
\
STC_INLINE Self##_iter Self##_begin(const Self* self) { \
Self##_iter it = {self->data, self->data + self->size}; \
return it; \
} \
\
STC_INLINE Self##_iter Self##_end(const Self* self) { \
Self##_iter it = {NULL, self->data + self->size}; \
return it; \
} \
\
STC_INLINE void Self##_next(Self##_iter* it) \
{ if (++it->ref == it->end) it->ref = NULL; } \
struct stc_nostruct
#endif
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