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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 8687 | turbocat | 1 | #include |
| 2 | #include |
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| 3 | #include |
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| 4 | |||
| 5 | int getdigit(char ch, int base) |
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| 6 | { |
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| 7 | if (isdigit(ch)) ch-= '0'; |
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| 8 | else |
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| 9 | if (isalpha(ch) && ch <= 'Z') ch = 10 + ch - 'A'; |
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| 10 | else |
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| 11 | if (isalpha(ch)) ch = 10 + ch - 'a'; |
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| 12 | else |
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| 13 | return -1; |
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| 14 | |||
| 15 | if (ch / base != 0) return -1; |
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| 16 | |||
| 17 | return ch; |
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| 18 | } |
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| 19 | |||
| 20 | |||
| 21 | long int strtol (const char* str, char** endptr, int base) |
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| 22 | { |
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| 23 | long int res = 0; |
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| 24 | int sign = 1; |
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| 25 | |||
| 26 | if (base > 36) |
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| 27 | { |
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| 28 | errno = EINVAL; |
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| 29 | goto bye; |
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| 30 | } |
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| 31 | |||
| 32 | while (isspace(*str)) str++; |
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| 33 | |||
| 34 | if (*str == '-') { sign = -1; str++; } |
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| 35 | else |
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| 36 | if (*str == '+') str++; |
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| 37 | |||
| 38 | if (base == 0 || base == 16) |
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| 39 | { |
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| 40 | if (*str == '0' && (str[1] == 'x' || str[1] == 'X')) |
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| 41 | { |
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| 42 | base = 16; |
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| 43 | str += 2; |
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| 44 | } |
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| 45 | } |
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| 46 | |||
| 47 | if (base == 0 && *str == '0') base = 8; |
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| 48 | |||
| 49 | if (base == 0) base = 10; |
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| 50 | |||
| 51 | |||
| 52 | int digit; |
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| 53 | while ((digit = getdigit(*str, base)) >= 0) |
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| 54 | { |
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| 55 | res = base * res + digit; |
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| 56 | str++; |
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| 57 | if (res < 0) |
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| 58 | { |
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| 59 | errno = ERANGE; |
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| 60 | if (sign > 0) |
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| 61 | res = LONG_MAX; |
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| 62 | else |
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| 63 | res = LONG_MIN; |
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| 64 | } |
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| 65 | } |
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| 66 | |||
| 67 | bye: |
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| 68 | if (endptr) |
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| 69 | *endptr = (char*)str; |
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| 70 | |||
| 71 | return res * sign; |
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| 72 | } |
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| 73 |