Glib实例学习（6）双端队列

1：结构

typedef struct {
GList *head;
GList *tail;
guint length;
} GQueue;

2：原型

GQueue* g_queue_new (void);
void g_queue_free (GQueue *queue);
#define G_QUEUE_INIT
void g_queue_init (GQueue *queue);
void g_queue_clear (GQueue *queue);
gboolean g_queue_is_empty (GQueue *queue);
guint g_queue_get_length (GQueue *queue);
void g_queue_reverse (GQueue *queue);
GQueue* g_queue_copy (GQueue *queue);
void g_queue_foreach (GQueue *queue,
GFunc func,
gpointer user_data);
GList* g_queue_find (GQueue *queue,
gconstpointer data);
GList* g_queue_find_custom (GQueue *queue,
gconstpointer data,
GCompareFunc func);
void g_queue_sort (GQueue *queue,
GCompareDataFunc compare_func,
gpointer user_data);
void g_queue_push_head (GQueue *queue,
gpointer data);
void g_queue_push_tail (GQueue *queue,
gpointer data);
void g_queue_push_nth (GQueue *queue,
gpointer data,
gint n);
gpointer g_queue_pop_head (GQueue *queue);
gpointer g_queue_pop_tail (GQueue *queue);
gpointer g_queue_pop_nth (GQueue *queue,
guint n);
gpointer g_queue_peek_head (GQueue *queue);
gpointer g_queue_peek_tail (GQueue *queue);
gpointer g_queue_peek_nth (GQueue *queue,
guint n);
gint g_queue_index (GQueue *queue,
gconstpointer data);
void g_queue_remove (GQueue *queue,
gconstpointer data);
void g_queue_remove_all (GQueue *queue,
gconstpointer data);
void g_queue_insert_before (GQueue *queue,
GList *sibling,
gpointer data);
void g_queue_insert_after (GQueue *queue,
GList *sibling,
gpointer data);
void g_queue_insert_sorted (GQueue *queue,
gpointer data,
GCompareDataFunc func,
gpointer user_data);
void g_queue_push_head_link (GQueue *queue,
GList *link_);
void g_queue_push_tail_link (GQueue *queue,
GList *link_);
void g_queue_push_nth_link (GQueue *queue,
gint n,
GList *link_);
GList* g_queue_pop_head_link (GQueue *queue);
GList* g_queue_pop_tail_link (GQueue *queue);
GList* g_queue_pop_nth_link (GQueue *queue,
guint n);
GList* g_queue_peek_head_link (GQueue *queue);
GList* g_queue_peek_tail_link (GQueue *queue);
GList* g_queue_peek_nth_link (GQueue *queue,
guint n);
gint g_queue_link_index (GQueue *queue,
GList *link_);
void g_queue_unlink (GQueue *queue,
GList *link_);
void g_queue_delete_link (GQueue *queue,
GList *link_);

3：实例

#include <stdio.h>
#include <glib.h>
#include <glib/gprintf.h>

struct map {
int key;
char *value;
} m[10] = {
{0,"zero"},
{1,"one"},
{2,"two"},
{3,"three"},
{4,"four"},
{5,"five"},
{6,"six"},
{7,"seven"},
{8,"eight"},
{9,"nine"},
};
typedef struct map map;

static void
myPrintInt(gpointer p1, gpointer fmt)
{
g_printf(fmt, *(gint *)p1);
}

static void
myPrintStr(gpointer p1, gpointer fmt)
{
g_printf(fmt, (gchar *)p1);
}

static void
test_queue_1(void)
{
// GQueue* g_queue_new(void);
GQueue *queue = g_queue_new();
// gboolean g_queue_is_empty(GQueue *queue);
gboolean b = g_queue_is_empty(queue);
g_printf("The queue should be empty now.\t\tResult: %s.\n", b ? "YES" : "NO");

// void g_queue_push_tail(GQueue *queue, gpointer data);
gint i;
for (i = 0; i < sizeof (m) / sizeof (m[0]); i++)
g_queue_push_tail(queue, m[i].value);

// void g_queue_foreach(GQueue *queue, GFunc func, gpointer user_data);
g_printf("Now the queue[after push tail] :\n");
g_queue_foreach(queue, myPrintStr, "%s, ");
g_printf("\n");

// guint g_queue_get_length(GQueue *queue);
g_printf("The lenght should be '%d' now.\t\tResult: %d.\n", 10, g_queue_get_length(queue));

// void g_queue_reverse(GQueue *queue);
g_queue_reverse(queue);
g_printf("Now the queue[after reverse] :\n");
g_queue_foreach(queue, myPrintStr, "%s, ");
g_printf("\n");

// gpointer g_queue_pop_head(GQueue *queue);
g_printf("The head should be '%s' now.\t\tResult: %s.\n", "nine", (gchar *)g_queue_pop_head(queue));

// gpointer g_queue_pop_tail(GQueue *queue);
g_printf("The tail should be '%s' now.\t\tResult: %s.\n", "zero", (gchar *)g_queue_pop_tail(queue));
g_printf("Now the queue[after pop head and tail] :\n");
g_queue_foreach(queue, myPrintStr, "%s, ");
g_printf("\n");

// gpointer g_queue_pop_nth(GQueue *queue, guint n);
g_printf("The head should be '%s' now.\t\tResult: %s.\n", "eight", (gchar *)g_queue_pop_nth(queue, 0));

// void g_queue_push_head(GQueue *queue, gpointer data);
g_queue_push_head(queue, "zero");
g_queue_push_head(queue, "eight");

// void g_queue_push_nth(GQueue *queue, gpointer data, gint n);
g_queue_push_nth(queue, "nine", 2);

g_printf("Now the queue[after push 'zero' 'eight' 'nine'] :\n");
g_queue_foreach(queue, myPrintStr, "%s, ");
g_printf("\n");

// gpointer g_queue_peek_head(GQueue *queue);
g_printf("The head should be '%s' now.\t\tResult: %s.\n", "eight", (gchar *)g_queue_peek_head(queue));

// gpointer g_queue_peek_tail(GQueue *queue);
g_printf("The tail should be '%s' now.\t\tResult: %s.\n", "zero", (gchar *)g_queue_peek_tail(queue));

// gpointer g_queue_peek_nth(GQueue *queue, guint n);
g_printf("The head should be '%s' now.\t\tResult: %s.\n", "eight", (gchar *)g_queue_peek_nth(queue, 0));

/*
// void g_queue_clear(GQueue *queue);
g_queue_clear(queue);
g_printf("Now the queue[after clear] :\n");
g_queue_foreach(queue, myPrintStr, "%s, ");
g_printf("\n");
*/

// void g_queue_free(GQueue *queue);
g_queue_free(queue);
}

static gint
sort(gconstpointer p1, gconstpointer p2, gpointer user_data)
{
gint32 a, b;

a = *(gint*)(p1);
b = *(gint*)(p2);

return (a > b ? +1 : a == b ? 0 : -1);
}

static gint
myCompareInt(gconstpointer p1, gconstpointer p2)
{
const int *a = p1;
const int *b = p2;

return *a - *b;
}

static gint
sort_r(gconstpointer p1, gconstpointer p2, gpointer user_data)
{
gint32 a, b;

a = *(gint*)(p1);
b = *(gint*)(p2);

return (a < b ? +1 : a == b ? 0 : -1);
}

static void
test_queue_2(void)
{
GQueue *queue = NULL;
/*
// void g_queue_init(GQueue *queue);
g_queue_init(queue);
*/
queue = g_queue_new();

// void g_queue_insert_sorted(GQueue *queue, gpointer data, GCompareDataFunc func gpointer user_data);
gint i;
for (i = 0; i < sizeof (m) / sizeof (m[0]); i++)
g_queue_insert_sorted(queue, &m[i].key, sort_r, NULL);

g_printf("Now the queue[after insert sorted] :\n");
for (i = 0; i < queue->length; i++)
g_printf("%d, ", *(gint *)g_queue_peek_nth(queue, i));
g_printf("\n");

// void g_queue_remove(GQueue *queue, gconstpointer data);
g_queue_remove(queue, &m[3].key);
g_printf("Now the queue[after remove '%d'] :\n", m[3].key);
for (i = 0; i < queue->length; i++)
g_printf("%d, ", *(gint *)g_queue_peek_nth(queue, i));
g_printf("\n");

// GList* g_queue_find_custom(GQueue *queue, gconstpointer data, GCompareFunc func);
// void g_queue_insert_before(GQueue *queue, GList *sibling, gpointer data);
// void g_queue_insert_after(GQueue *queue, GList *sibling, gpointer data);
g_queue_insert_before(queue, g_queue_find_custom(queue, &m[5].key, myCompareInt), &m[3].key);
g_queue_insert_after(queue, g_queue_find_custom(queue, &m[5].key, myCompareInt), &m[3].key);

g_printf("Now the queue[after insert '%d' around '%d'] :\n", m[3].key, m[5].key);
g_queue_foreach(queue, myPrintInt, "%d, ");
g_printf("\n");

// void g_queue_sort(GQueue *queue, GCompareDataFunc compare, gpointer user_data);
g_queue_sort(queue, sort, NULL);

g_printf("Now the queue[sorted] :\n");
g_queue_foreach(queue, myPrintInt, "%d, ");
g_printf("\n");

// GQueue* g_queue_copy(GQueue *queue);
GQueue *q = g_queue_copy(queue);
g_printf("Now the queue[copy] :\n");
g_queue_foreach(q, myPrintInt, "%d, ");
g_printf("\n");

// void g_queue_remove_all(GQueue *queue, gconstpointer data);
g_queue_remove_all(q, &m[3].key);
g_printf("Now the queue[remove '%d'] :\n", m[3].key);
g_queue_foreach(q, myPrintInt, "%d, ");
g_printf("\n");

g_queue_free(q);
g_queue_free(queue);
}

int
main(void)
{
printf("BEGIN:\n************************************************************\n");
printf("\n------------------------------------------------------------\ntest_queue_1:\n");
test_queue_1();
printf("------------------------------------------------------------\n");
printf("\n------------------------------------------------------------\ntest_queue_2:\n");
test_queue_2();
printf("------------------------------------------------------------\n");
printf("\n************************************************************\nDONE\n");

return 0;
}

4：结果

[xied1@soho use]$ gcc `pkg-config --cflags --libs glib-2.0` -Wall -O2 -o queue queue.c
[xied1@soho use]$ ./queue
BEGIN:
************************************************************

------------------------------------------------------------
test_queue_1:
The queue should be empty now. Result: YES.
Now the queue[after push tail] :
zero, one, two, three, four, five, six, seven, eight, nine,
The lenght should be '10' now. Result: 10.
Now the queue[after reverse] :
nine, eight, seven, six, five, four, three, two, one, zero,
The head should be 'nine' now. Result: nine.
The tail should be 'zero' now. Result: zero.
Now the queue[after pop head and tail] :
eight, seven, six, five, four, three, two, one,
The head should be 'eight' now. Result: eight.
Now the queue[after push 'zero' 'eight' 'nine'] :
eight, zero, nine, seven, six, five, four, three, two, one,
The head should be 'eight' now. Result: eight.
The tail should be 'zero' now. Result: one.
The head should be 'eight' now. Result: eight.
------------------------------------------------------------

------------------------------------------------------------
test_queue_2:
Now the queue[after insert sorted] :
9, 8, 7, 6, 5, 4, 3, 2, 1, 0,
Now the queue[after remove '3'] :
9, 8, 7, 6, 5, 4, 2, 1, 0,
Now the queue[after insert '3' around '5'] :
9, 8, 7, 6, 3, 5, 3, 4, 2, 1, 0,
Now the queue[sorted] :
0, 1, 2, 3, 3, 4, 5, 6, 7, 8, 9,
Now the queue[copy] :
0, 1, 2, 3, 3, 4, 5, 6, 7, 8, 9,
Now the queue[remove '3'] :
0, 1, 2, 4, 5, 6, 7, 8, 9,
------------------------------------------------------------

************************************************************
DONE

5：小结

创建： g_queue_new()

入队： g_queue_push_head() g_queue_push_tail()

出队： g_queue_pop_head() g_queue_pop_tail()

销毁： g_queue_free()