/* *  linux/lib/string.c * *  Copyright (C) 1991, 1992  Linus Torvalds */#include <sys/types.h>#include <string.h>#include <ctype.h>#ifndef __HAVE_ARCH_STRTOULunsigned long strtoul(const char *cp,char **endp,unsigned int base){  unsigned long result = 0,value;    if (!base) {    base = 10;    if (*cp == '0') {      base = 8;      cp++;      if ((*cp == 'x') && isxdigit(cp[1])) {	cp++;	base = 16;      }    }  }  while (isxdigit(*cp) && (value = isdigit(*cp) ? *cp-'0' : (islower(*cp) ? toupper(*cp) : *cp)-'A'+10) < base) {    result = result*base + value;    cp++;  }  if (endp)    *endp = (char *)cp;  return result;}#endif