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资源加载 - 相对路径获取JAVA配置文件

2013-06-30 15:49 671 查看

以下使用strncpy 但不安全

#include <stdio.h>
#include <malloc.h>
#include <string.h>
#include <windows.h>

int main (int argc, char *argv[])
{
char *p = "hello who you are ? ";
char *dest;
char s[20];
int valLen;

dest = (char *) malloc (sizeof (char) * 1000);

//if we use strncpy_s we will get assert
//for the size is not enough
//we can just change s[20] to s[21]
/*
strncpy_s(s, _countof(s), p, strlen(p));
printf("%s\n", s);
*/

// Here we use strncpy and get null termination
strncpy (dest, p, (valLen = strlen(p)));
dest[valLen] = '\0';
printf ("%s\n", dest);

//system ("pause");
return 0;
}

以下用strncpy 我们认为它更安全

#include <stdio.h>
#include <malloc.h>
#include <string.h>
#include <windows.h>

int main (int argc, char *argv[])
{
char *p = "hello who you are ? ";
char *dest;
char s[20];
int valLen;

dest = (char *) malloc (sizeof (char) * 1000);

//if we use strncpy_s we will get assert
//for the size is not enough
//we can just change s[20] to s[21]

strncpy_s(s, _countof(s), p, strlen(p));
printf("%s\n", s);

// Here we use strncpy and get null termination
/*
strncpy (dest, p, (valLen = strlen(p)));
dest[valLen] = '\0';
printf ("%s\n", dest);
*/
//system ("pause");
return 0;
}

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