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circleq.3, queue.3: EXAMPLES: Move circleq example program from queue.3 to circleq.3 

Signed-off-by: Alejandro Colomar <colomar.6.4.3@gmail.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
This commit is contained in:
Alejandro Colomar 2020-10-23 16:57:31 +02:00 committed by Michael Kerrisk
parent 66bb7b4db4
commit 8306d5cb87
2 changed files with 56 additions and 56 deletions
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56
man3/circleq.3
View File

@ -210,4 +210,60 @@ from the circular queue.
.SH CONFORMING TO
.SH BUGS
.SH EXAMPLES
.Ss Circular queue example
.Bd -literal
#include <stddef.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/queue.h>
struct entry {
int data;
CIRCLEQ_ENTRY(entry) entries; /* Queue. */
};
CIRCLEQ_HEAD(circlehead, entry);
int
main(void)
{
struct entry *n1, *n2, *n3, *np;
struct circlehead head; /* Queue head. */
int i;
CIRCLEQ_INIT(&head); /* Initialize the queue. */
n1 = malloc(sizeof(struct entry)); /* Insert at the head. */
CIRCLEQ_INSERT_HEAD(&head, n1, entries);
n1 = malloc(sizeof(struct entry)); /* Insert at the tail. */
CIRCLEQ_INSERT_TAIL(&head, n1, entries);
n2 = malloc(sizeof(struct entry)); /* Insert after. */
CIRCLEQ_INSERT_AFTER(&head, n1, n2, entries);
n3 = malloc(sizeof(struct entry)); /* Insert before. */
CIRCLEQ_INSERT_BEFORE(&head, n2, n3, entries);
CIRCLEQ_REMOVE(&head, n2, entries); /* Deletion. */
free(n2);
/* Forward traversal. */
i = 0;
CIRCLEQ_FOREACH(np, &head, entries)
np->data = i++;
/* Reverse traversal. */
CIRCLEQ_FOREACH_REVERSE(np, &head, entries)
printf("%i\en", np->data);
/* Queue deletion. */
n1 = CIRCLEQ_FIRST(&head);
while (n1 != (void *)&head) {
n2 = CIRCLEQ_NEXT(n1, entries);
free(n1);
n1 = n2;
}
CIRCLEQ_INIT(&head);
exit(EXIT_SUCCESS);
}
.Ed
.SH SEE ALSO

56
man3/queue.3
View File

@ -791,62 +791,6 @@ main(void)
exit(EXIT_SUCCESS);
}
.Ed
.Ss Circular queue example
.Bd -literal
#include <stddef.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/queue.h>
struct entry {
int data;
CIRCLEQ_ENTRY(entry) entries; /* Queue. */
};
CIRCLEQ_HEAD(circlehead, entry);
int
main(void)
{
struct entry *n1, *n2, *n3, *np;
struct circlehead head; /* Queue head. */
int i;
CIRCLEQ_INIT(&head); /* Initialize the queue. */
n1 = malloc(sizeof(struct entry)); /* Insert at the head. */
CIRCLEQ_INSERT_HEAD(&head, n1, entries);
n1 = malloc(sizeof(struct entry)); /* Insert at the tail. */
CIRCLEQ_INSERT_TAIL(&head, n1, entries);
n2 = malloc(sizeof(struct entry)); /* Insert after. */
CIRCLEQ_INSERT_AFTER(&head, n1, n2, entries);
n3 = malloc(sizeof(struct entry)); /* Insert before. */
CIRCLEQ_INSERT_BEFORE(&head, n2, n3, entries);
CIRCLEQ_REMOVE(&head, n2, entries); /* Deletion. */
free(n2);
/* Forward traversal. */
i = 0;
CIRCLEQ_FOREACH(np, &head, entries)
np->data = i++;
/* Reverse traversal. */
CIRCLEQ_FOREACH_REVERSE(np, &head, entries)
printf("%i\en", np->data);
/* Queue deletion. */
n1 = CIRCLEQ_FIRST(&head);
while (n1 != (void *)&head) {
n2 = CIRCLEQ_NEXT(n1, entries);
free(n1);
n1 = n2;
}
CIRCLEQ_INIT(&head);
exit(EXIT_SUCCESS);
}
.Ed
.Sh CONFORMING TO
Not in POSIX.1, POSIX.1-2001 or POSIX.1-2008.
Present on the BSDs.