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pqu · glouw/ctl Wiki · GitHub
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pqu
Gustav Louw edited this page Jan 13, 2021
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6 revisions
#include <pqu.h>
The CTL pqu
, analogous to the STL std::priority_queue
, is a
container specializing in prioritized queue operations. A pqu
can be
seen as a simplified but extended vec
, and therefor maintains all pointer validity
and memory contiguousness properties of a vec
.
#include <stdio.h>
typedef struct
{
int value;
int priority;
}
elem;
#define P
#define T elem
#include <pqu.h>
int compare(elem* a, elem* b)
{
return a->priority < b->priority;
}
int main(void)
{
pqu_elem a = pqu_elem_init(compare);
for(int i = 0; i < 32; i++)
pqu_elem_push(&a, (elem) { rand() % 1024, rand() % 1024 });
int sum = 0;
int index = 0;
while(!pqu_elem_empty(&a))
{
elem* e = pqu_elem_top(&a);
printf("%2d: %4d %4d\n", index, e->value, e->priority);
sum += e->value;
index += 1;
pqu_elem_pop(&a);
}
printf("%d\n", sum);
pqu_elem_free(&a);
}
gcc main.c -I ctl
Lower priority elements can be queued first by reversing the comparison operator.
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