| 0,0 → 1,68 |
|---|
| #include <ctype.h> |
| #include <stdlib.h> |
| #include <errno.h> |
| #include <limits.h> |
| #include <inttypes.h> |
| |
| #define __expect(foo,bar) (foo) |
| #define __likely(foo) __expect((foo),1) |
| #define __unlikely(foo) __expect((foo),0) |
| |
| unsigned long long int strtoull(const char *ptr, char **endptr, int base) |
| { |
| int neg = 0, overflow = 0; |
| long long int v=0; |
| const char* orig; |
| const char* nptr=ptr; |
| |
| while(isspace(*nptr)) ++nptr; |
| |
| if (*nptr == '-') { neg=1; nptr++; } |
| else if (*nptr == '+') ++nptr; |
| orig=nptr; |
| if (base==16 && nptr[0]=='0') goto skip0x; |
| if (base) { |
| register unsigned int b=base-2; |
| if (__unlikely(b>34)) { errno=EINVAL; return 0; } |
| } else { |
| if (*nptr=='0') { |
| base=8; |
| skip0x: |
| if (((*(nptr+1)=='x')||(*(nptr+1)=='X')) && isxdigit(nptr[2])) { |
| nptr+=2; |
| base=16; |
| } |
| } else |
| base=10; |
| } |
| while(__likely(*nptr)) { |
| register unsigned char c=*nptr; |
| c=(c>='a'?c-'a'+10:c>='A'?c-'A'+10:c<='9'?c-'0':0xff); |
| if (__unlikely(c>=base)) break; /* out of base */ |
| { |
| register unsigned long x=(v&0xff)*base+c; |
| register unsigned long long w=(v>>8)*base+(x>>8); |
| if (w>(ULLONG_MAX>>8)) overflow=1; |
| v=(w<<8)+(x&0xff); |
| } |
| ++nptr; |
| } |
| if (__unlikely(nptr==orig)) { /* no conversion done */ |
| nptr=ptr; |
| errno=EINVAL; |
| v=0; |
| } |
| if (endptr) *endptr=(char *)nptr; |
| if (overflow) { |
| errno=ERANGE; |
| return ULLONG_MAX; |
| } |
| return (neg?-v:v); |
| } |
| |
| /* die, BSD, die!!! */ |
| unsigned long long int strtouq(const char *nptr, char **endptr, int base) |
| __attribute__((alias("strtoull"))); |
| |
| uintmax_t strtoumax(const char *nptr, char **endptr, int base) |
| __attribute__((alias("strtoull"))); |