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