整理代码

util/xpack/example/mysql.cpp

@@ -0,0 +1,89 @@
+#include <iostream>
+#include <mysql/mysql.h>
+#include <xpack/mysql.h>
+#include <xpack/json.h>
+
+using namespace std;
+
+struct VID {
+    int64_t Vid;
+    int64_t vlen;
+    string  sid;
+    int64_t level;
+    XPACK(A(Vid, "db:vid"), O(vlen, sid, level));
+};
+
+typedef char cfgstr[64];
+struct config {
+    cfgstr   host;
+    uint32_t port;
+    cfgstr   user;
+    cfgstr   password;
+    cfgstr   dbname;
+    XPACK(M(host, port, user, password, dbname))
+};
+
+int main(int argc, char **argv) {
+    MYSQL *mysql = NULL;
+
+    if (mysql_library_init(argc, argv, NULL)) {
+        cout<<"could not initialize MySQL client library"<<endl;
+        return -1;
+    }
+ 
+    mysql = mysql_init(mysql);
+
+    if (!mysql) {
+        cout<<"Init faild, out of memory?"<<endl;
+        return -1;
+    }
+        
+    config cfg;
+    xpack::json::decode_file("./config.json", cfg);
+
+    if (!mysql_real_connect(mysql,        /* MYSQL structure to use */
+                            cfg.host,     /* server hostname or IP address */ 
+                            cfg.user,     /* mysql user */
+                            cfg.password, /* password */
+                            cfg.dbname,   /* default database to use, NULL for none */
+                            cfg.port,     /* port number, 0 for default */
+                            NULL,         /* socket file or named pipe name */
+                            CLIENT_FOUND_ROWS /* connection flags */ )) {
+        cout<<"Connect failed"<<endl;
+    } else {              
+        if (mysql_query(mysql, argv[1])) {
+            cout<<"Query failed: "<<mysql_error(mysql)<<endl;
+        } else {
+            MYSQL_RES *result = mysql_store_result(mysql);
+
+            if (!result) {
+                cout<<"Couldn't get results set: "<<mysql_error(mysql)<<endl;
+            } else {
+                VID vid;
+                xpack::mysql::decode(result, vid); // decode first row
+
+                vector<VID> vids;
+                xpack::mysql::decode(result, vids);// decode all rows
+
+                vector<int64_t> ids;
+                xpack::mysql::decode(result, "vid", ids); // decode vid column of all rows
+
+                int64_t id;
+                xpack::mysql::decode(result, "vid", id);  // decode vid column of first row
+
+                cout<<xpack::json::encode(vid)<<endl;
+                cout<<xpack::json::encode(vids)<<endl;
+                cout<<xpack::json::encode(ids)<<endl;
+                cout<<id<<endl;
+
+                mysql_free_result(result);
+            }
+        }
+    }
+        
+    mysql_close(mysql);
+
+    mysql_library_end();
+  
+    return EXIT_SUCCESS;
+}