glib 哈希调用

glib: linux 编译调用

gcc main.c `pkg-config --libs --cflags glib-2.0` -o main

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#include <stdio.h> #include <glib.h> #include <stdlib.h> #include <string.h>   typedef struct _Node {     char key[32];     char value[32]; }Node;   static void displayhash(gpointer key, gpointer value, gpointer user_data) {     printf("user_data:%s\n",user_data);     printf("key:%s value:%s\n",key,value); }   static void destroy_key(gpointer hash_data) {     printf("destroy key:%s\n",hash_data);     //因为我这里的键是数组形式不是指针所以不用释放内存。我就直接清空吧 /*    free(hash_data);     hash_data = NULL;*/     memset(hash_data,0,sizeof(hash_data)); }   static void destroy_value(gpointer hash_data) {     printf("destroy value:%s\n",hash_data);     //因为我这里的值是数组形式不是指针所以不用释放内存。我就直接清空吧 /*    free(hash_data);     hash_data = NULL;*/     memset(hash_data,0,sizeof(hash_data)); }   /*用来创建每个节点。每个键值对都需要有自己的内存*/ Node *create_node(char *key,char * value) {     Node *node = NULL;     node = malloc(sizeof(Node));     if (node == NULL) {         return NULL;     }       memset(node,0,sizeof(Node));     strcpy(node->key,key);     strcpy(node->value,value);       return node; }   int main() {     char buff[32] = {0};     static GHashTable *g_hash = NULL;           g_hash = g_hash_table_new_full(g_str_hash, g_int_equal, destroy_key, destroy_value);           Node *node = create_node("name","xcy");     if(node != NULL)         g_hash_table_insert(g_hash, &node->key, &node->value);     Node *node1 = create_node("age","18");     if(node1 != NULL)         g_hash_table_insert(g_hash, &node1->key, &node1->value);     Node *node2 = create_node("sex","man");     if(node2 != NULL)         g_hash_table_insert(g_hash, &node2->key, &node2->value);     Node *node3 = create_node("id","00001");     if(node3 != NULL)         g_hash_table_insert(g_hash, &node3->key, &node3->value);         memcpy(buff,"this is parm",12);     if(NULL != g_hash) {         g_hash_table_foreach(g_hash, displayhash, buff);     }             printf("------------------free hashtable------------------------\n");       g_hash_table_destroy(g_hash); }