C++博客-ymgsc-文章分类-C++http://www.cppblog.com/ymgsc/category/9960.html下次一定赶车zh-cnWed, 01 Jul 2009 10:11:00 GMTWed, 01 Jul 2009 10:11:00 GMT60sqlite 方便调用的宏http://www.cppblog.com/ymgsc/articles/77960.html又没赶上车又没赶上车Thu, 26 Mar 2009 08:58:00 GMThttp://www.cppblog.com/ymgsc/articles/77960.htmlhttp://www.cppblog.com/ymgsc/comments/77960.htmlhttp://www.cppblog.com/ymgsc/articles/77960.html#Feedback0http://www.cppblog.com/ymgsc/comments/commentRss/77960.htmlhttp://www.cppblog.com/ymgsc/services/trackbacks/77960.html #include "sqlite3.h" #pragma comment(lib,"sqlite3.lib") #define __PACKET_LEN_ (4096) #define DB_SQL_LEN (1024) sqlite3* g_db = NULL; int sprintf_s_1(CHAR **string,UINT& sizeInBytes,const char *fmt,...) { char buf[__PACKET_LEN_] = {0}; char* oldstring = *string; va_list args; va_start(args, fmt); vsprintf_s(buf, __PACKET_LEN_, fmt, args); va_end(args); int nLen = sprintf_s(oldstring, sizeInBytes, buf); oldstring += nLen; *string = oldstring; sizeInBytes -= nLen; return nLen; } ////////////////////////////////////////////////////////////////////////// //宏定义 #define DECLARE_SQL(__db_) \ sqlite3 *db = NULL; \ sqlite3_stmt * stmt = NULL; \ const char *sztail; \ char sqlcmd[DB_SQL_LEN] = "\0"; \ char* psql = NULL; \ int count; \ UINT uSprintLen; \ int ret; \ db = __db_; //可变参数的宏 #define PREPARE_SQL(...) \ count = 0; \ ret = -1; \ uSprintLen = DB_SQL_LEN; \ psql = sqlcmd; \ sprintf_s_1(&psql, uSprintLen, __VA_ARGS__); \ sqlite3_prepare(db , sqlcmd , -1 , &stmt , &sztail); \ ret = sqlite3_step(stmt); \ while(ret == SQLITE_ROW) \ { \ UINT uColIndex = 0; #define FINISH_SQL \ ret = sqlite3_step(stmt); \ count++; \ } \ sqlite3_finalize(stmt); \ stmt = NULL; #define SQL_INT(__value_) __value_ = sqlite3_column_int(stmt , uColIndex++); #define SQL_BOOL(__value_) __value_ = (sqlite3_column_int(stmt , uColIndex++) == 1 ? true : false); #define SQL_TEXT(__value_, __size_) sprintf_s(__value_ , __size_, "%s" , sqlite3_column_text(stmt , uColIndex++)) //////////////////////////////////////////////////////// struct MAGIC { UINT ID; CHAR name[32]; }; BOOL db_init() { int ret = 0; char szFileName[MAX_PATH]; ::GetModuleFileNameA(NULL,szFileName, sizeof(szFileName)); char *pStr = strrchr(szFileName, '\\' ); sprintf_s(pStr + 1,MAX_PATH - (pStr + 1 - szFileName),"%s", "user.db"); ret = sqlite3_open(szFileName, &g_db); if( ret ){ sqlite3_close(g_db); g_db = NULL; return FALSE; } return TRUE; } BOOL db_close() { if(g_db){ sqlite3_close(g_db); g_db = NULL; } return TRUE; } int _tmain(int argc, _TCHAR* argv[]) { if (db_init()) { DECLARE_SQL(g_db); PREPARE_SQL("select ID, name from TBL_MAGIC where ID = %d" , 1); MAGIC magic; SQL_INT(magic.ID); SQL_TEXT(magic.name, 32); printf("[%d][%s]\n", magic.ID, magic.name); FINISH_SQL; db_close(); } return 0; }

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