1 // Common/StringToInt.cpp

     2 

     3 #include "StdAfx.h"

     4 

     5 #include "StringToInt.h"

     6 

     7 UInt64 ConvertStringToUInt64(const char *s, const char **end)

     8 {

     9   UInt64 result = 0;

    10   for (;;)

    11   {

    12     char c = *s;

    13     if (c < '0' || c > '9')

    14     {

    15       if (end != NULL)

    16         *end = s;

    17       return result;

    18     }

    19     result *= 10;

    20     result += (c - '0');

    21     s++;

    22   }

    23 }

    24 

    25 UInt64 ConvertOctStringToUInt64(const char *s, const char **end)

    26 {

    27   UInt64 result = 0;

    28   for (;;)

    29   {

    30     char c = *s;

    31     if (c < '0' || c > '7')

    32     {

    33       if (end != NULL)

    34         *end = s;

    35       return result;

    36     }

    37     result <<= 3;

    38     result += (c - '0');

    39     s++;

    40   }

    41 }

    42 

    43 

    44 UInt64 ConvertStringToUInt64(const wchar_t *s, const wchar_t **end)

    45 {

    46   UInt64 result = 0;

    47   for (;;)

    48   {

    49     wchar_t c = *s;

    50     if (c < '0' || c > '9')

    51     {

    52       if (end != NULL)

    53         *end = s;

    54       return result;

    55     }

    56     result *= 10;

    57     result += (c - '0');

    58     s++;

    59   }

    60 }

    61 

    62 

    63 Int64 ConvertStringToInt64(const char *s, const char **end)

    64 {

    65   if (*s == '-')

    66     return -(Int64)ConvertStringToUInt64(s + 1, end);

    67   return ConvertStringToUInt64(s, end);

    68 }