145 lines
3.2 KiB
C++
145 lines
3.2 KiB
C++
// Common/StringToInt.cpp
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#include "StdAfx.h"
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#include "StringToInt.h"
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static const UInt32 k_UInt32_max = 0xFFFFFFFF;
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static const UInt64 k_UInt64_max = UINT64_CONST(0xFFFFFFFFFFFFFFFF);
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// static const UInt64 k_UInt64_max = (UInt64)(Int64)-1;
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#define CONVERT_STRING_TO_UINT_FUNC(uintType, charType, charTypeUnsigned) \
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uintType ConvertStringTo ## uintType(const charType *s, const charType **end) throw() { \
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if (end) *end = s; \
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uintType res = 0; \
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for (;; s++) { \
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charTypeUnsigned c = (charTypeUnsigned)*s; \
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if (c < '0' || c > '9') { if (end) *end = s; return res; } \
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if (res > (k_ ## uintType ## _max) / 10) return 0; \
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res *= 10; \
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unsigned v = (c - '0'); \
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if (res > (k_ ## uintType ## _max) - v) return 0; \
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res += v; }}
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CONVERT_STRING_TO_UINT_FUNC(UInt32, char, Byte)
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CONVERT_STRING_TO_UINT_FUNC(UInt32, wchar_t, wchar_t)
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CONVERT_STRING_TO_UINT_FUNC(UInt64, char, Byte)
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CONVERT_STRING_TO_UINT_FUNC(UInt64, wchar_t, wchar_t)
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Int32 ConvertStringToInt32(const wchar_t *s, const wchar_t **end) throw()
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{
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if (end)
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*end = s;
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const wchar_t *s2 = s;
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if (*s == '-')
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s2++;
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if (*s2 == 0)
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return 0;
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const wchar_t *end2;
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UInt32 res = ConvertStringToUInt32(s2, &end2);
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if (*s == '-')
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{
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if (res > ((UInt32)1 << (32 - 1)))
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return 0;
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}
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else if ((res & ((UInt32)1 << (32 - 1))) != 0)
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return 0;
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if (end)
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*end = end2;
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if (*s == '-')
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return -(Int32)res;
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return (Int32)res;
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}
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UInt32 ConvertOctStringToUInt32(const char *s, const char **end) throw()
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{
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if (end)
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*end = s;
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UInt32 res = 0;
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for (;; s++)
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{
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unsigned c = (unsigned char)*s;
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if (c < '0' || c > '7')
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{
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if (end)
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*end = s;
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return res;
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}
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if ((res & (UInt32)7 << (32 - 3)) != 0)
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return 0;
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res <<= 3;
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res |= (unsigned)(c - '0');
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}
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}
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UInt64 ConvertOctStringToUInt64(const char *s, const char **end) throw()
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{
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if (end)
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*end = s;
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UInt64 res = 0;
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for (;; s++)
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{
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unsigned c = (unsigned char)*s;
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if (c < '0' || c > '7')
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{
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if (end)
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*end = s;
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return res;
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}
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if ((res & (UInt64)7 << (64 - 3)) != 0)
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return 0;
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res <<= 3;
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res |= (unsigned)(c - '0');
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}
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}
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UInt32 ConvertHexStringToUInt32(const char *s, const char **end) throw()
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{
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if (end)
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*end = s;
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UInt32 res = 0;
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for (;; s++)
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{
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unsigned c = (Byte)*s;
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unsigned v;
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if (c >= '0' && c <= '9') v = (c - '0');
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else if (c >= 'A' && c <= 'F') v = 10 + (c - 'A');
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else if (c >= 'a' && c <= 'f') v = 10 + (c - 'a');
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else
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{
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if (end)
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*end = s;
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return res;
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}
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if ((res & (UInt32)0xF << (32 - 4)) != 0)
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return 0;
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res <<= 4;
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res |= v;
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}
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}
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UInt64 ConvertHexStringToUInt64(const char *s, const char **end) throw()
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{
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if (end)
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*end = s;
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UInt64 res = 0;
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for (;; s++)
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{
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unsigned c = (Byte)*s;
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unsigned v;
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if (c >= '0' && c <= '9') v = (c - '0');
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else if (c >= 'A' && c <= 'F') v = 10 + (c - 'A');
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else if (c >= 'a' && c <= 'f') v = 10 + (c - 'a');
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else
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{
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if (end)
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*end = s;
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return res;
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}
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if ((res & (UInt64)0xF << (64 - 4)) != 0)
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return 0;
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res <<= 4;
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res |= v;
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}
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}
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