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 UInt64 ConvertHexStringToUInt64(const char *s, const char **end) 44 { 45 UInt64 result = 0; 46 for (;;) 47 { 48 char c = *s; 49 UInt32 v; 50 if (c >= '0' && c <= '9') v = (c - '0'); 51 else if (c >= 'A' && c <= 'F') v = 10 + (c - 'A'); 52 else if (c >= 'a' && c <= 'f') v = 10 + (c - 'a'); 53 else 54 { 55 if (end != NULL) 56 *end = s; 57 return result; 58 } 59 result <<= 4; 60 result |= v; 61 s++; 62 } 63 } 64 65 66 UInt64 ConvertStringToUInt64(const wchar_t *s, const wchar_t **end) 67 { 68 UInt64 result = 0; 69 for (;;) 70 { 71 wchar_t c = *s; 72 if (c < '0' || c > '9') 73 { 74 if (end != NULL) 75 *end = s; 76 return result; 77 } 78 result *= 10; 79 result += (c - '0'); 80 s++; 81 } 82 } 83 84 85 Int64 ConvertStringToInt64(const char *s, const char **end) 86 { 87 if (*s == '-') 88 return -(Int64)ConvertStringToUInt64(s + 1, end); 89 return ConvertStringToUInt64(s, end); 90 } 91
