字符串处理函数收集

头文件：#include <string.h>

1、safe_strncpy函数

函数实现：/* Like strncpy but make sure the resulting string is always 0 terminated. */char * safe_strncpy(char *dst, const char *src, size_t size){if (!size) return dst;dst[--size] = '\0';return strncpy(dst, src, size);}

2、strncpy函数

 函数实现 char* strncpy(char *dest, const char *src, size_t n){             size_t i;               for (i = 0 ; i < n && src[i] != '\0' ; i++)                   dest[i] = src[i];               for ( ; i < n ; i++)                   dest[i] = '\0';               return dest;           }