diff -r ffa851df0825 -r 2fb8b9db1c86 symbian-qemu-0.9.1-12/python-2.6.1/Python/mystrtoul.c --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/symbian-qemu-0.9.1-12/python-2.6.1/Python/mystrtoul.c Fri Jul 31 15:01:17 2009 +0100 @@ -0,0 +1,285 @@ + +#include "Python.h" + +#if defined(__sgi) && defined(WITH_THREAD) && !defined(_SGI_MP_SOURCE) +#define _SGI_MP_SOURCE +#endif + +/* strtol and strtoul, renamed to avoid conflicts */ + + +#include +#ifdef HAVE_ERRNO_H +#include +#endif + +/* Static overflow check values for bases 2 through 36. + * smallmax[base] is the largest unsigned long i such that + * i * base doesn't overflow unsigned long. + */ +static unsigned long smallmax[] = { + 0, /* bases 0 and 1 are invalid */ + 0, + ULONG_MAX / 2, + ULONG_MAX / 3, + ULONG_MAX / 4, + ULONG_MAX / 5, + ULONG_MAX / 6, + ULONG_MAX / 7, + ULONG_MAX / 8, + ULONG_MAX / 9, + ULONG_MAX / 10, + ULONG_MAX / 11, + ULONG_MAX / 12, + ULONG_MAX / 13, + ULONG_MAX / 14, + ULONG_MAX / 15, + ULONG_MAX / 16, + ULONG_MAX / 17, + ULONG_MAX / 18, + ULONG_MAX / 19, + ULONG_MAX / 20, + ULONG_MAX / 21, + ULONG_MAX / 22, + ULONG_MAX / 23, + ULONG_MAX / 24, + ULONG_MAX / 25, + ULONG_MAX / 26, + ULONG_MAX / 27, + ULONG_MAX / 28, + ULONG_MAX / 29, + ULONG_MAX / 30, + ULONG_MAX / 31, + ULONG_MAX / 32, + ULONG_MAX / 33, + ULONG_MAX / 34, + ULONG_MAX / 35, + ULONG_MAX / 36, +}; + +/* maximum digits that can't ever overflow for bases 2 through 36, + * calculated by [int(math.floor(math.log(2**32, i))) for i in range(2, 37)]. + * Note that this is pessimistic if sizeof(long) > 4. + */ +#if SIZEOF_LONG == 4 +static int digitlimit[] = { + 0, 0, 32, 20, 16, 13, 12, 11, 10, 10, /* 0 - 9 */ + 9, 9, 8, 8, 8, 8, 8, 7, 7, 7, /* 10 - 19 */ + 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, /* 20 - 29 */ + 6, 6, 6, 6, 6, 6, 6}; /* 30 - 36 */ +#elif SIZEOF_LONG == 8 +/* [int(math.floor(math.log(2**64, i))) for i in range(2, 37)] */ +static int digitlimit[] = { + 0, 0, 64, 40, 32, 27, 24, 22, 21, 20, /* 0 - 9 */ + 19, 18, 17, 17, 16, 16, 16, 15, 15, 15, /* 10 - 19 */ + 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, /* 20 - 29 */ + 13, 12, 12, 12, 12, 12, 12}; /* 30 - 36 */ +#else +#error "Need table for SIZEOF_LONG" +#endif + +/* +** strtoul +** This is a general purpose routine for converting +** an ascii string to an integer in an arbitrary base. +** Leading white space is ignored. If 'base' is zero +** it looks for a leading 0, 0b, 0B, 0o, 0O, 0x or 0X +** to tell which base. If these are absent it defaults +** to 10. Base must be 0 or between 2 and 36 (inclusive). +** If 'ptr' is non-NULL it will contain a pointer to +** the end of the scan. +** Errors due to bad pointers will probably result in +** exceptions - we don't check for them. +*/ +unsigned long +PyOS_strtoul(register char *str, char **ptr, int base) +{ + register unsigned long result = 0; /* return value of the function */ + register int c; /* current input character */ + register int ovlimit; /* required digits to overflow */ + + /* skip leading white space */ + while (*str && isspace(Py_CHARMASK(*str))) + ++str; + + /* check for leading 0 or 0x for auto-base or base 16 */ + switch (base) { + case 0: /* look for leading 0, 0b, 0o or 0x */ + if (*str == '0') { + ++str; + if (*str == 'x' || *str == 'X') { + /* there must be at least one digit after 0x */ + if (_PyLong_DigitValue[Py_CHARMASK(str[1])] >= 16) { + if (ptr) + *ptr = str; + return 0; + } + ++str; + base = 16; + } else if (*str == 'o' || *str == 'O') { + /* there must be at least one digit after 0o */ + if (_PyLong_DigitValue[Py_CHARMASK(str[1])] >= 8) { + if (ptr) + *ptr = str; + return 0; + } + ++str; + base = 8; + } else if (*str == 'b' || *str == 'B') { + /* there must be at least one digit after 0b */ + if (_PyLong_DigitValue[Py_CHARMASK(str[1])] >= 2) { + if (ptr) + *ptr = str; + return 0; + } + ++str; + base = 2; + } else { + base = 8; + } + } + else + base = 10; + break; + + case 2: /* skip leading 0b or 0B */ + if (*str == '0') { + ++str; + if (*str == 'b' || *str == 'B') { + /* there must be at least one digit after 0b */ + if (_PyLong_DigitValue[Py_CHARMASK(str[1])] >= 2) { + if (ptr) + *ptr = str; + return 0; + } + ++str; + } + } + break; + + case 8: /* skip leading 0o or 0O */ + if (*str == '0') { + ++str; + if (*str == 'o' || *str == 'O') { + /* there must be at least one digit after 0o */ + if (_PyLong_DigitValue[Py_CHARMASK(str[1])] >= 8) { + if (ptr) + *ptr = str; + return 0; + } + ++str; + } + } + break; + + case 16: /* skip leading 0x or 0X */ + if (*str == '0') { + ++str; + if (*str == 'x' || *str == 'X') { + /* there must be at least one digit after 0x */ + if (_PyLong_DigitValue[Py_CHARMASK(str[1])] >= 16) { + if (ptr) + *ptr = str; + return 0; + } + ++str; + } + } + break; + } + + /* catch silly bases */ + if (base < 2 || base > 36) { + if (ptr) + *ptr = str; + return 0; + } + + /* skip leading zeroes */ + while (*str == '0') + ++str; + + /* base is guaranteed to be in [2, 36] at this point */ + ovlimit = digitlimit[base]; + + /* do the conversion until non-digit character encountered */ + while ((c = _PyLong_DigitValue[Py_CHARMASK(*str)]) < base) { + if (ovlimit > 0) /* no overflow check required */ + result = result * base + c; + else { /* requires overflow check */ + register unsigned long temp_result; + + if (ovlimit < 0) /* guaranteed overflow */ + goto overflowed; + + /* there could be an overflow */ + /* check overflow just from shifting */ + if (result > smallmax[base]) + goto overflowed; + + result *= base; + + /* check overflow from the digit's value */ + temp_result = result + c; + if (temp_result < result) + goto overflowed; + + result = temp_result; + } + + ++str; + --ovlimit; + } + + /* set pointer to point to the last character scanned */ + if (ptr) + *ptr = str; + + return result; + +overflowed: + if (ptr) { + /* spool through remaining digit characters */ + while (_PyLong_DigitValue[Py_CHARMASK(*str)] < base) + ++str; + *ptr = str; + } + errno = ERANGE; + return (unsigned long)-1; +} + +/* Checking for overflow in PyOS_strtol is a PITA; see comments + * about PY_ABS_LONG_MIN in longobject.c. + */ +#define PY_ABS_LONG_MIN (0-(unsigned long)LONG_MIN) + +long +PyOS_strtol(char *str, char **ptr, int base) +{ + long result; + unsigned long uresult; + char sign; + + while (*str && isspace(Py_CHARMASK(*str))) + str++; + + sign = *str; + if (sign == '+' || sign == '-') + str++; + + uresult = PyOS_strtoul(str, ptr, base); + + if (uresult <= (unsigned long)LONG_MAX) { + result = (long)uresult; + if (sign == '-') + result = -result; + } + else if (sign == '-' && uresult == PY_ABS_LONG_MIN) { + result = LONG_MIN; + } + else { + errno = ERANGE; + result = LONG_MAX; + } + return result; +}