iccavr编译器下的源代码

				#include 
				
				char *strstr(CONST char *s1, CONST char *s2)
					{
					int i = strlen(s1);
					int j = strlen(s2);
				
					for ( ; i && i >= j; s1++, i--)
						if (strncmp(s1, s2, j) == 0)
							return (char *)s1;
					return 0;
					}