imei verify C code

最新推荐文章于 2024-04-13 18:01:27 发布

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#IMEI #校验 #code #C #imei 算法

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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#define SUCCESS 0
#define FAIL -1

int DIAG_imeiValueVerify(char* imei)
{
if(15 != strlen(imei))
{
printf("The imei value you set illegal\n");
printf("set imei fail\n");
return FAIL;
}
else
{
char* ptr = imei;
int idx = 0;
int iTmp = 0;
int sum = 0;

for(idx = 0; idx < strlen(imei)-1; idx++)
{
if(('0' > *(ptr+idx)) || *(ptr+idx)>'9' )
{
printf("The imei value you set illegal\nset imei fail\n");
return FAIL;
}
if(idx%2)
{
iTmp = (*(ptr+idx)-'0')*2;
sum += (iTmp)%10 + (iTmp/10)%10;
}
else
{
sum += (*(ptr+idx)-'0');
}
}

if(0 == sum%10)
{
iTmp = 0;
}
else
{
iTmp = 10 - sum%10;
}
printf("The verify num is %d\n" , iTmp);
if((*(ptr+idx)-'0') != iTmp)
{
printf("The imei value you set illegal\n");
printf("set imei fail\n");
return FAIL;
}
}
return SUCCESS;
}
int main( int argc , char** argv)
{
if(argc < 2)
{
printf("please set the imei parameter\n");
return -1;
}
if(DIAG_imeiValueVerify(argv[1]))
{
printf("verify failed\n");
return -1;
}
printf("verify success\n");
return 0;
}