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1 // Common/StringToInt.cpp
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2
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3 #include "StdAfx.h"
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4
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5 #include "StringToInt.h"
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6
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7 UInt64 ConvertStringToUInt64(const char *s, const char **end)
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8 {
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9 UInt64 result = 0;
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10 for (;;)
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11 {
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12 char c = *s;
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13 if (c < '0' || c > '9')
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14 {
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15 if (end != NULL)
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16 *end = s;
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17 return result;
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18 }
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19 result *= 10;
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20 result += (c - '0');
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21 s++;
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22 }
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23 }
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24
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25 UInt64 ConvertOctStringToUInt64(const char *s, const char **end)
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26 {
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27 UInt64 result = 0;
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28 for (;;)
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29 {
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30 char c = *s;
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31 if (c < '0' || c > '7')
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32 {
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33 if (end != NULL)
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34 *end = s;
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35 return result;
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36 }
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37 result <<= 3;
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38 result += (c - '0');
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39 s++;
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40 }
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41 }
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42
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43 UInt64 ConvertHexStringToUInt64(const char *s, const char **end)
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44 {
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45 UInt64 result = 0;
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46 for (;;)
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47 {
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48 char c = *s;
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49 UInt32 v;
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50 if (c >= '0' && c <= '9') v = (c - '0');
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51 else if (c >= 'A' && c <= 'F') v = 10 + (c - 'A');
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52 else if (c >= 'a' && c <= 'f') v = 10 + (c - 'a');
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53 else
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54 {
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55 if (end != NULL)
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56 *end = s;
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57 return result;
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58 }
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59 result <<= 4;
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60 result |= v;
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61 s++;
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62 }
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63 }
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64
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65
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66 UInt64 ConvertStringToUInt64(const wchar_t *s, const wchar_t **end)
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67 {
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68 UInt64 result = 0;
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69 for (;;)
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70 {
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71 wchar_t c = *s;
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72 if (c < '0' || c > '9')
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73 {
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74 if (end != NULL)
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75 *end = s;
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76 return result;
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77 }
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78 result *= 10;
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79 result += (c - '0');
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80 s++;
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81 }
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82 }
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83
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84
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85 Int64 ConvertStringToInt64(const char *s, const char **end)
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86 {
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87 if (*s == '-')
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88 return -(Int64)ConvertStringToUInt64(s + 1, end);
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89 return ConvertStringToUInt64(s, end);
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90 }
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