iccavr编译器下的源代码

				#include 
				#include 
				#include 
				
				long atol(CONST char *s)
					{
					int uminus;
					long v;
					
					while (isspace(*s))
						s++;
					uminus = 0;
					if (*s == '-')
						{
						uminus = 1;
						s++;
						}
					else if (*s == '+')
						s++;
					for (v = 0; isdigit(*s); )
						v = v * 10 + *s++ - '0';
					if (uminus)
						return -v;
					return v;
					}